Tower-shaped structures

Abstract

To provide a towering structure capable of using industrial products for foundation parts by unifying the size of the foundation part supporting the tower into multiple types depending on the size of the tower and site conditions, and the like.SOLUTION: The towering structure includes: a tower part A including multiple steel pipe columns that are constituted of lower steel pipe unit members joined together in the axial direction and multiple upper steel pipe unit members; and a base part B that is placed integrally with the tower part A at the bottom of the tower part A. The base part B includes: a foundation slab 23 placed at the bottom of the excavated ground; multiple lower steel pipe column unit members 4 placed being spaced from each other apart on the foundation slab 23, which constitute the bottom part of each steel pipe column 1; and multiple foundation panel unit members placed on the foundation slab 23. The foundation panel unit member is constituted of an outer foundation panel unit member 19a and an inner foundation panel unit member 19b placed inside, and concrete 20 is filled into the foundation formwork 19 composed of the outer foundation panel unit member 19a and the inner foundation panel unit member 19b.SELECTED DRAWING: Figure 15

Description

[Technical Field]

[0001] The present invention relates to a tower-like structure comprising a tower-like section as an upper structure made up of a plurality of steel columns made of steel pipes or shaped steel, erected at intervals, and a plurality of horizontal members and diagonal members erected between adjacent steel columns, and a foundation section as a lower structure formed integrally with the tower-like section at the lower end thereof. In particular, the foundation section is integrated with the tower-like section, and the shape, size, etc. of the foundation section are standardized into multiple types depending on the scale (height, diameter, etc.) of the tower-like section, the site conditions (area, elevation difference, etc.) of the foundation section, the ground conditions, etc., thereby realizing the industrialization of the foundation section, which reduces the manufacturing costs of the members and parts that make up the foundation section, and enables shortened, labor-saving, and simplified construction, particularly in densely populated areas where vehicles have difficulty entering, and mountainous areas that are difficult to access. [Background technology]

[0002] In recent years, tower-like structures using one or more steel pipe poles have been constructed in densely populated residential areas and mountainous regions with difficult access, such as utility poles for power transmission and transmission, lighting poles, and sign poles.

[0003] Steel pipe poles are closed-section materials and have higher geometric cross-sectional performance than poles made of steel sections such as angle bars and H-shaped steel beams, which are open-section materials. In addition, they are lighter than other composite poles such as reinforced concrete poles, so in recent years they have been widely used as poles for transmitting and receiving electricity, such as utility poles and lighting poles.

[0004] Furthermore, for aesthetic reasons, steel pipe columns can be manufactured with a thin diameter to avoid a feeling of oppression, and because they have a small wind coefficient they are structurally advantageous against wind loads. They also have many other advantages, such as being less likely to break easily due to unexpected impacts such as traffic accidents.

[0005] However, compared to open-section materials such as angle bars, which can be easily joined with joint bolts, there are issues with the method of joining steel pipes together.In addition, in recent years, long steel pipe poles exceeding 10 meters have been used for electric poles, lighting poles, and other purposes.However, when transporting long steel pipe poles exceeding 10 meters to the site, there have been issues such as traffic restrictions along the way making it difficult to transport them to the site, and the need for large trailers, which increases costs.

[0006] For this reason, steel pipe poles to be installed in mountainous areas that are difficult to access or densely populated areas that are difficult for vehicles to enter are manufactured to the required length by joining multiple short steel pipes together on-site.

[0007] A widely used method for joining short steel pipes in the axial direction of the pipes is to weld a joint plate in the shape of a flange to the ends of the steel pipes to be joined, and then fasten the joint plates together with multiple joint bolts that pass through the joint plates in the axial direction of the pipes (flange joint joining).

[0008] For example, Patent Document 1 discloses an invention relating to an improved pile joint structure for joining two or more piles in series. Briefly explained, tubular piles are aligned in the axial direction, a joint member is hung between the two aligned piles, a common through-hole is drilled in the joint member and the piles, and a male-threaded rod with a nut threadedly fitted thereto passes through the through-hole.

[0009] A central hole is drilled in the male threaded rod from one end to the other end along the axis, and a slit is formed in the other end of the male threaded rod that leads to the central hole. The slit is expanded by a pin that is forcibly inserted from one end of the male threaded rod, and a nut that is threadedly fitted onto the one end of the male threaded rod is tightened to fasten the pile and connecting member between the expanded part.

[0010] In addition, the foundation that supports the tower-like structure is separated from the tower-like structure and designed separately based on the size of the site, elevation difference, bearing capacity of the ground, water level, access roads, etc., and at the site it is separated from the tower-like structure as the upper structure and constructed separately based on individual design drawings. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-329118 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-069071 [Patent Document 3] Japanese Utility Model Application Publication No. 60-195330 Summary of the Invention [Problem to be solved by the invention]

[0012] However, the flange joints mentioned above require high manufacturing precision for the joint plates and high welding precision for welding the joint plates to the ends of the steel pipes. In addition, the high heat generated by welding causes the base material (steel columns such as steel pipes) to become plastic (iron is an elastic material and is difficult to break), which could lead to serious accidents such as deterioration or breakage of the welded joints.

[0013] Furthermore, flange joints are primarily used as connectors for liquid pipes that are installed horizontally on the ground, such as pipelines, to transport fluids such as water and oil, and when used in vertical structures such as tower-like structures, there are many problems with the structure and ease of construction.

[0014] In particular, joint plates need to be of a certain thickness to ensure strength, and steel pipes with joint plates attached are heavy, making them difficult to handle during transportation, etc. Furthermore, when joint plates are attached to joints, the joint plates can generate a "leverage reaction force" at the joints.

[0015] In addition, since the joint bolts are arranged at a predetermined pitch around the circumferential direction of the steel pipe column, if there are a large number of bolts, the bolt pitch becomes narrow and it can become difficult to tighten the joint bolts.

[0016] Furthermore, the joint plates can be a hindrance during storage or transportation, and are particularly heavy and bulky, making handling difficult.

[0017] On the other hand, the joining method of Patent Document 1 was developed especially as a method for joining piles in series, but the joints between the piles are mainly subjected to axial compression force, which is transmitted directly between the piles as the pile ends abut against each other, so the shear force acting on the joint bolts due to the axial compression force is small.

[0018] For this reason, as shown in the figure, there is a problem that the number of joint bolts is small and the tensile strength of the joint portion is considerably smaller than the compressive strength.

[0019] It is assumed that manufacturing the male threaded rod is troublesome because it is necessary to form a reaction force receiver by slotting one end of the male threaded rod for the nut that is fastened to the other end of the male threaded rod.

[0020] Furthermore, the foundations of steel pipe poles such as utility poles and lighting poles are generally designed individually based on site conditions such as the size of the site, elevation difference, bearing capacity of the ground, water level, and access roads, and are constructed on site based on individual design drawings separately from the superstructure, which poses the following challenges that need to be resolved.

[0021] (1) Construction quality varies depending on the contractor. (2) Waste materials such as formwork materials are generated at each construction site, causing environmental problems. (3) In the case of temporary structures, costs for demolishing the reinforced concrete foundation and waste concrete will be incurred. (4) Sites without access roads and where heavy machinery cannot be used require longer construction periods and higher construction costs. (5) The ideal shape for the foundation of a tower-like structure is said to be circular in plan view, but this is not actually done due to the difficulty of constructing formwork on site.

[0022] The present invention has been made to solve the above-mentioned problems, and aims to provide a tower-like structure that realizes industrial production of the foundation by integrating the foundation that supports the tower-like portion as the upper structure with the tower-like portion, and standardizing (standardizing) the shape, size, etc. of the foundation into multiple types depending on the scale (height, diameter, etc.) of the tower-like portion, the site conditions (area, elevation difference, etc.) of the foundation, the ground conditions, etc., thereby reducing the manufacturing costs of the members and parts that make up the foundation, and enabling shortened construction time, labor-saving, and simplified construction, particularly in places such as densely populated residential areas that are difficult for vehicles to enter and mountainous areas that are difficult to access. [Means for solving the problem]

[0023] The present invention comprises a tower-shaped section having a plurality of steel columns consisting of a lower steel column unit material and a plurality of upper steel column unit materials joined to each other in the axial direction, and a foundation section arranged integrally with the tower-shaped section at the lower end of the tower-shaped section, wherein the foundation section comprises a foundation slab arranged at the bottom of the excavated ground, a plurality of lower steel column unit materials arranged at intervals on the foundation slab and constituting the lower end of each of the steel columns, and a plurality of foundation panel unit materials arranged on the foundation slab, wherein the foundation panel unit materials consist of an outer foundation panel unit material and an inner foundation panel unit material arranged inside the outer foundation panel unit material, and a solidification material is filled inside the foundation formwork formed by the outer foundation panel unit material and the inner foundation panel unit material.

[0024] The tower-like section can be constructed as a truss structure tower-like section consisting of a plurality of steel columns (single columns) arranged at intervals on the foundation slab, and a plurality of horizontal and diagonal unit members arranged between the steel columns and connecting each steel column. The steel column can be constructed by joining a lower steel column unit material and a plurality of upper steel column unit materials together in the axial direction, and the tower-shaped section can be constructed as a single column by simply joining a lower steel column unit material and a plurality of upper steel column unit materials in the axial direction.

[0025] In addition, the tower-shaped portion of the truss structure may be constructed from a plurality of steel columns erected at intervals and a plurality of horizontal and diagonal unit members erected between adjacent steel columns, in the shape of a polygonal tower, for example, approximately triangular, rectangular, or hexagonal when viewed from above. In addition, the lower steel column unit material and the upper steel column unit material can be made of circular steel pipes or square steel pipes (steel pipes), and the horizontal and diagonal member unit materials can be made of H-shaped steel, channel steel, or angle steel (angle material).

[0026] The foundation portion comprises a foundation slab placed at the bottom of the excavated ground, a plurality of lower steel column unit materials placed on top of the foundation slab and constituting the lower end of each steel column, and a plurality of foundation panel unit materials arranged circumferentially around the tower-shaped portion around the periphery of the foundation slab, and can be integrally formed as a foundation beam (strip footing) or underground continuous wall that continues circumferentially around the tower-shaped portion by filling a solidifying material such as concrete or soil cement into the foundation formwork formed by the plurality of foundation panel unit materials.

[0027] The lower steel column unit materials are arranged at intervals on the foundation slab, and the foundation panel unit materials are made up of a plurality of outer foundation panel unit materials and an inner foundation panel unit material arranged inside them.The outer foundation panel unit materials and the inner foundation panel unit materials are arranged in a continuous circumferential direction of the tower-shaped portion, and by filling the foundation formwork formed by the outer foundation panel unit materials and the inner foundation panel unit materials with a solidifying material such as concrete or soil cement, the tower-shaped portion can be integrally formed as a foundation beam (strip footing) or underground continuous wall that is continuous in the circumferential direction of the tower-shaped portion.

[0028] In particular, the outer foundation panel unit material and the inner foundation panel unit material are arranged continuously circumferentially around the tower-shaped portion on the outside and inside of each lower steel column unit material, respectively, and in particular, the inner foundation panel unit material is arranged in an approximately U-shape in plan view along the outer peripheral surface of the lower steel column unit material at the column base of the lower steel column unit material, thereby forming column base foundations around each lower steel column unit material and foundation beams (strip foundations) integrated with the column base foundations between each lower steel column unit material.

[0029] Furthermore, the outer foundation panel unit materials and the inner foundation panel unit materials are arranged in multiple stages according to the depth of the foundation, and the outer foundation panel unit materials and the inner foundation panel unit materials are connected to each other with multiple FormTie (registered trademark) bolts, and the outer foundation panel unit materials and the inner foundation panel unit materials arranged on the outside and inside of each lower steel column unit material are connected to the lower steel column unit materials with multiple FormTie (registered trademark) bolts, thereby allowing the outer foundation panel unit materials and the inner foundation panel unit materials to be firmly assembled.

[0030] In addition, by arranging multiple foundation steel column unit materials at intervals around the circumferential direction of the tower-shaped section on the sides (inside or outside) of the foundation panel unit material (outer foundation panel unit material and / or inner foundation panel unit material), and erecting multiple foundation steel beam unit materials and / or foundation steel brace unit materials between each foundation steel column unit material and each lower steel column unit material that constitutes the lower end of the tower-shaped section, the entire foundation section can be integrated, significantly increasing the rigidity of the foundation section.

[0031] In addition, the rigidity of the entire foundation can be further increased by erecting the foundation steel beam unit materials and / or foundation steel brace unit materials between each of the foundation steel column unit materials arranged at intervals around the circumferential direction of the tower-shaped section.

[0032] In this case, the unit members can be easily connected to each other using connecting metal fittings. Furthermore, the foundation steel column unit materials, foundation steel beam unit materials, and foundation steel brace unit materials can be made of shaped steel materials such as angle steel (angle steel) and H-shaped steel, or steel pipes.

[0033] In addition, soil such as excavated soil generated by digging down into the ground, crushed stone or soil cement may be filled inside the foundation beam (strip foundation) or underground continuous wall and around the lower steel column unit material that constitutes the lower end of the tower-shaped section, i.e., between the foundation beam (strip foundation) or underground continuous wall and the lower steel column unit material that constitutes the lower end of the tower-shaped section.

[0034] Furthermore, the foundation panel unit materials (inner foundation panel unit materials and outer panel unit materials) are preferably formed from lightweight thin steel plates (thin steel plates about 1 mm thick, etc.), lightweight corrugated steel plates, or mesh steel plates (for example, lath wire mesh plates), and are unitized into sizes and shapes that allow them to be transported, assembled, joined, etc., by hand alone, so that assembly on site can be carried out extremely efficiently by hand alone without the use of special heavy machinery.

[0035] [Tower-like part] The tower-shaped section made of steel columns may be a single column made of a single steel column, but an assembled column made of multiple steel columns is preferable in terms of strength. For example, a tower-shaped section with a roughly triangular shape in plan view constructed from multiple steel columns made of shaped steel or steel pipes erected at intervals and multiple horizontal and diagonal unit members made of shaped steel or the like erected between adjacent steel columns is preferable as a truss structure in plan and elevation.

[0036] Steel columns can be structural steel columns made of H-shaped steel, angle steel, or channel steel, or steel pipe columns made of steel pipes with circular or square cross sections, and all of these can be easily obtained standard products (JIS, ISO, or BS standards).

[0037] In particular, steel pipe poles have high cross-sectional performance due to their shape, are lighter than other composite poles such as reinforced concrete poles, and can be manufactured with a narrow diameter to avoid an oppressive appearance, making them particularly suitable for use in urban areas as electric poles for transmitting and receiving electricity, lighting poles, and sign poles.

[0038] Furthermore, for example, a steel pipe column can be easily formed to the required length by joining a plurality of standardized lower steel pipe unit materials and upper steel pipe unit materials via joint steel pipe unit materials and a plurality of joint bolts.

[0039] Furthermore, by using standard products for the upper steel pipe unit material, lower steel pipe unit material, and joint steel pipe unit material, the required steel pipes can be easily obtained, which is extremely economical. Standard products that can be used include steel pipes of JIS, ISO, or BS standards.

[0040] [Foundation] The foundation portion is formed in a frame shape that surrounds the lower end of the tower-shaped portion, and can be formed into a continuous polygonal frame shape that is approximately circular, rectangular, hexagonal, or other polygonal shape when viewed from above, for example, by forming a base foundation around the base of each steel column and forming a foundation beam (or strip foundation) integrally with each base foundation between the base foundations.

[0041] By using a footing foundation for the column base, the contact area can be increased, thereby improving the stability and bearing capacity of the column base.

[0042] The base is preferably formed in a generally circular frame shape in plan view, which is economical and can significantly increase the resistance to tipping over due to horizontal loads from any direction of the tower-shaped section. Furthermore, a generally circular base in plan view is preferred because it can meet the required design performance with the minimum amount of material required.

[0043] The planar shape of the foundation does not necessarily have to be circular, but may be rectangular or polygonal, such as a hexagon or octagon. The optimal planar shape can be selected depending on the cross-sectional shape of the steel columns, the number of columns, the installation spacing, or the condition of the installation ground.

[0044] In addition, by forming the foundation part integrally with the column base part (lower steel column unit material) of each of the multiple steel columns, the resistance of the tower-shaped part to tipping over can be increased, and construction can be simplified and made more economical.

[0045] Furthermore, by erecting one or more foundation steel beam units made of shaped steel such as H-shaped steel between the surrounding frame-shaped foundation (column base foundations and foundation beams) and the lower steel column unit members of each steel column, a foundation for a steel-framed reinforced concrete structure can be achieved, significantly increasing its strength and rigidity. In this case, the foundation steel beam units are preferably erected in a lattice pattern (a grid pattern) that is rectangular or triangular in plan view, connecting the lower steel column unit members of each steel column, and both ends are preferably extended and joined to the foundation steel column unit members of the surrounding foundation. Furthermore, it is preferable to erect them in multiple stages depending on the depth of the foundation. Furthermore, it is preferable to install jacks (preload jacks) on the foundation steel beam units to apply axial force to the foundation steel beam units.

[0046] In particular, by integrating the foundation with the tower-shaped portion and standardizing the shape, size, etc. of the foundation into multiple types depending on the scale (height, diameter, etc.) of the tower-shaped portion, the site conditions (area, elevation difference, etc.) of the foundation, the ground conditions, etc. (standardization), the foundation can be industrialized, thereby reducing the manufacturing costs of the components and parts that make up the foundation and enabling shorter, more labor-saving, and simplified construction on site.

[0047] In other words, by standardizing the shapes and dimensions of the foundation panel unit materials and metal fittings such as Form-Tie (registered trademark) bolts that make up the outer and inner formwork of the foundation formwork of the foundation section, as well as the type, diameter, length, and other dimensions of the foundation beam unit materials installed between the foundation section and the steel columns, into multiple types depending on the scale (height, diameter, etc.) of the tower-shaped section and the site conditions (area, elevation difference, etc.) on which the tower-shaped section is to be constructed (standardization), it is possible to reduce the manufacturing costs of these unit materials and parts and to shorten, save labor, and simplify construction on site.This means that even in places such as densely populated residential areas where vehicles cannot easily enter or mountainous areas that are difficult to access, construction can be done efficiently and at low cost in a short period of time using almost only human labor, without the need for large heavy machinery or special skills.

[0048] As a construction method for the foundation, for example, the column base foundation and the foundation beams (or continuous footings) between each column base foundation are formed on the ground in a roughly circular frame shape in plan view, and then the area directly below each column base foundation and each foundation beam and the inside of each column base foundation and each foundation beam are excavated evenly throughout, causing the entire foundation to gradually sink under its own weight. Then, a foundation slab is formed at the bottom inside the sunken foundation (Figure 15(b), etc.).

[0049] Furthermore, the area directly below and inside the foundation is excavated using a method similar to that used for manual caisson construction, so the surrounding soil is not disturbed and the passive earth pressure on the side of the foundation of the tower-like structure works effectively, ensuring a constant level of stability against tipping over.

[0050] In particular, to form a deep fire-fighting water tank, etc., the area directly below and inside the foundation is dug further to gradually lower the entire foundation, and at the same time, new foundation formwork (formwork for the column base foundations and foundation beams) is assembled in sequence on top of each column base foundation and foundation beam, and concrete is poured into it to form side walls that are continuous circumferentially and vertically with the foundation, making them one unit with the foundation.

[0051] Then, a foundation slab is formed at the bottom of the excavated area. In this case, the base foundation of each steel column may be formed only at the bottom of the column base, and the portion above that may be only a wall portion.

[0052] With this construction method, the foundation formwork also serves as a retaining wall to prevent the collapse of the ground and subsidence of the surrounding ground, eliminating the need for separate retaining wall construction, enabling significant cost savings and safe construction.

[0053] The space between the foundation and the steel columns can be left as is, or it can be filled with soil excavated on site to create a planting space such as a flower bed, or concrete can be poured into the base of the foundation and the foundation beams, or a foundation slab can be installed and filled with water to serve as a resistance (heavy body) to prevent the tower-like structure from tipping over, or a fire water tank in urban areas, or even an evacuation shelter in the event of a mountain disaster by installing a foundation slab and roof slab.

[0054] The foundation slab can be omitted if the foundation design conditions allow it to withstand the foundation reaction force using passive earth pressure alone (see Figures 15(a) and (b)). For example, in the case of structures such as utility poles erected in towns, the foundation slab can be omitted because the utility poles are structurally supported by the passive earth pressure of the surrounding area.

[0055] [Joint between the lower steel pipe unit and the upper steel pipe unit] When a lower steel pipe unit material and an upper steel pipe unit material are used as the lower steel column unit material and the upper steel column unit material, respectively, the upper steel pipe unit material and the lower steel pipe unit material are joined by a joint steel pipe unit material which is formed with a smaller diameter than the upper and lower steel pipe unit materials and which is inserted into the lower end of the upper steel pipe unit material and the upper end of the lower steel pipe unit material, respectively, a plurality of joint nuts attached to the inner peripheral wall of the joint steel pipe unit material, and a plurality of joint bolts which are screwed into the joint nuts through bolt holes formed in the peripheral walls of the end parts of the upper steel pipe unit material and the lower steel pipe unit material and in the peripheral wall of the joint steel pipe unit material, thereby allowing the joining to be carried out very easily and reliably by tightening the joint bolts, without the need for special joining means such as welding.

[0056] Furthermore, by attaching a plurality of positioning fittings to the outer peripheral wall of the joint steel pipe unit material, which set the upper steel pipe unit material and the lower steel pipe unit material on the same pipe axis, the upper steel pipe unit material and the lower steel pipe unit material can be set on the same pipe axis and joined. It is preferable that the positioning fittings be attached to at least three places in the circumferential direction of the joint steel pipe unit material.

[0057] In addition, by filling a filler such as adhesive or non-shrinkage mortar between the inner peripheral walls of the ends of the upper steel pipe unit material and the lower steel pipe unit material and the outer peripheral wall of the joint steel pipe unit material, the lower steel pipe unit material and the upper steel pipe unit material can be rigidly joined together.

[0058] Furthermore, the multiple joint bolts provide shear resistance to the tensile load in the pipe axis direction acting on the joint portion of the upper steel pipe unit material and the lower steel pipe unit material, and the steel pipe directly resists the compressive load in the pipe axis direction at the butt joint portion of the ends of the upper steel pipe unit material and the lower steel pipe unit material.This eliminates problems that were problematic with conventional flange joint connections, such as the ``leverage reaction force'' caused by the joint plate occurring at the joint portion, the increase in weight of the steel pipe due to the attachment of the joint plate, and poor welding and welding heat caused by attaching the joint plate by welding.

[0059] Furthermore, by standardizing the lengths and diameters of the upper steel pipe unit materials, lower steel pipe unit materials, and joint steel pipe unit materials, as well as the joint bolts and joint nuts, etc., into multiple types in accordance with the scale (height, diameter, etc.) of the tower-shaped portion and the conditions (area, elevation difference, etc.) of the site on which the tower-shaped portion is to be constructed, as with the foundation portion, it is possible to reduce the manufacturing costs of these components and parts and to shorten construction time on site, save labor, and simplify construction, etc.

[0060] Furthermore, lower and upper steel pipe unit members of different diameters can be easily joined. In this case, multiple joint nuts are attached to the inner peripheral wall of the lower end of the upper steel pipe unit member, and the lower end of the upper steel pipe unit member is inserted into the upper end of a lower steel pipe unit member of a larger diameter than the upper steel pipe unit member. Then, joint bolts are passed through bolt holes formed in the peripheral wall of the upper end of the lower steel pipe unit member and the peripheral wall of the lower end of the upper steel pipe, and screwed into the joint nuts, allowing for extremely easy and reliable joining.

[0061] In addition, by filling adhesive or non-shrinkage mortar between the inner peripheral wall of the end of the lower steel pipe unit material and the outer peripheral wall of the end of the upper steel pipe unit material, lower steel pipe unit material and upper steel pipe unit material of different diameters can be easily joined in a rigid state.

[0062] Furthermore, the inner and outer formworks (foundation panel unit materials) that make up the foundation formwork for the foundation beams (or slab foundation) are preferably formed from lightweight thin steel plates, lightweight corrugated steel plates, or mesh steel plates (for example, lath wire mesh plates), and are unitized into sizes and shapes that allow them to be transported, assembled, joined, etc., by hand alone, which allows for extremely efficient assembly on site by hand alone without the use of special heavy machinery. [Effects of the Invention]

[0063] In the present invention, a tower-shaped section as an upper structure and a foundation section formed integrally with the tower-shaped section at the lower end of the tower-shaped section are both unitized, and the tower-shaped section is constructed from a plurality of upper steel column unit materials and lower steel column unit materials joined to each other in the axial direction, and the foundation section is formed from a plurality of foundation steel column unit materials installed at intervals around the tower-shaped section and joined to the lower end of the lower steel column unit material, and a plurality of foundation panel unit materials installed circumferentially of the tower-shaped section outside the foundation steel column unit materials.Therefore, by unifying (standardizing) the shape, size, etc. of the foundation into a plurality of types depending on the scale (height, diameter, etc.) of the tower-shaped section, the site conditions (area, elevation difference, etc.) of the foundation, the ground conditions, etc., the tower-shaped section and the foundation section can be industrially produced.

[0064] This also makes it possible to reduce the manufacturing costs of the individual unit materials that make up the tower-like portion and foundation portion, and to shorten the construction time on site, save labor, and achieve economical construction.

[0065] Furthermore, even in densely populated residential areas where vehicles have difficulty entering or mountainous areas that are difficult to access, the system can be constructed efficiently and at low cost in a short period of time using almost entirely human labor, without the need for large heavy machinery or special skills. [Brief explanation of the drawings]

[0066] [Figure 1] FIG. 1 is a longitudinal cross-sectional view of a tower-like structure consisting of a steel pipe column constructed as the tower-like portion of the tower-like structure and a foundation portion supporting the steel pipe column. [Figure 2] 2A and 2B are diagrams illustrating the column base of the steel pipe column illustrated in FIG. 1, where FIG. 2A is an enlarged cross-sectional view taken along the mm line in FIG. 1, and FIG. 2B is an enlarged view of the column base in FIG. [Figure 3] This is an illustration of the foundation of a tower-like structure consisting of a steel pipe column and a foundation supporting the steel pipe column, in which a foundation steel beam unit material and a foundation steel brace unit material are arranged between the lower steel pipe unit material of the steel pipe column and the foundation steel column unit material, where Figure (a) is a longitudinal cross-sectional view and Figure (b) is a cross-sectional view along line nn in Figure (a). [Figure 4] This is an illustration of a tower-like structure consisting of a steel pipe column and a foundation supporting the steel pipe column, with a foundation steel beam unit material and a simple jack arranged between the lower steel pipe unit material of the steel pipe column and the foundation steel column unit material, where Figure (a) is a longitudinal cross-sectional view and Figure (b) is a cross-sectional view along line oo in Figure (a). [Figure 5] This is an illustration of a tower-like structure consisting of a steel pipe column and a foundation supporting the steel pipe column, with a foundation steel beam unit material and a simple jack arranged between the lower steel pipe unit material of the steel pipe column and the foundation steel column unit material, where Figure (a) is a longitudinal cross-sectional view and Figure (b) is a cross-sectional view along line pp in Figure (a). [Figure 6]In a tower-like structure composed of a steel pipe column and a foundation that supports the steel pipe column, a foundation steel beam unit material and a simple jack are arranged between the lower steel pipe unit material of the steel pipe column and the foundation steel column unit material, and an anchor is arranged on the back side of the foundation steel column unit material. The figure shows this foundation part. Figure (a) is a longitudinal sectional view, Figure (b) is a sectional view taken along the q-q line in Figure (a), and Figure (c) is a sectional view taken along the r-r line in Figure (a). [Figure 7] Figures (a) to (e) are explanatory diagrams showing the construction procedure by the caisson method of the foundation part of the tower-like structure shown in Figure 3. [Figure 8] It is a figure showing the joint part between the upper steel pipe unit material and the lower steel pipe unit material of the same diameter. Figure (a) is a longitudinal sectional view, and Figure (b) is a sectional view taken along the b-b line in Figure (a). [Figure 9] Figure (a) is a perspective view of the steel pipe joint part shown in Figure 8, and Figure (b) is a perspective view of the positioning fitting. [Figure 10] Figures (a) and (b) are explanatory diagrams showing the method of filling an adhesive into the joint part between the lower steel pipe unit material and the upper steel pipe unit material. [Figure 11] It is a figure showing the joint part between the upper steel pipe unit material and the lower steel pipe unit material with different diameters. Figure (a) is a longitudinal sectional view, and Figure (b) is a sectional view taken along the c-c line in Figure (a). [Figure 12] Figure (a) is a perspective view of the steel pipe joint part shown in Figure 11, and Figure (b) is a perspective view of the positioning fitting. [Figure 13] It is a partial front view of an integrated up-and-down tower-like structure in which the tower-like part consists of a plurality of steel pipe columns, a plurality of horizontal unit materials and diagonal member unit materials installed between the steel pipe columns, and a foundation unit material. [Figure 14] It is an enlarged view of a part of the tower-like part of the tower-like structure shown in Figure 13. Figure (a) is its front view, and Figure (b) is a sectional view taken along the a-a line in Figure (a). [Figure 15] There is an enlarged view of the foundation part of the tower-like structure shown in Figure 13. Figure (a) is an enlarged sectional view taken along the d-d line in Figure 13, and Figure (b) is a front view of the foundation part shown in Figure 15(a). [Figure 16]This shows the foundation formed deep below the ground surface, where Figure (a) is an enlarged cross-section taken along line dd in Figure 13, and Figure (b) is a cross-section taken along line e-e in Figure 16(a). [Figure 17] 17(a) and 17(b) are diagrams illustrating a base part of another embodiment of the present invention, where FIG. 17(a) is a longitudinal cross-sectional view of the base part, and FIG. 17(b) is a cross-sectional view taken along line ff in FIG. 17(a). [Figure 18] 10A and 10B are longitudinal cross-sectional views of a base part according to another embodiment of the present invention. [Figure 19] 18(a) is a cross-sectional view taken along line tt in FIGS. 18(a) and 18(b), and FIG. 19(b) is a cross-sectional view taken along line uu in FIG. 19(a). [Figure 20] 20(a) and 20(b) are diagrams illustrating a base part of another embodiment of the present invention, where FIG. 20(a) is a longitudinal cross-sectional view of the base part, and FIG. 20(b) is a cross-sectional view taken along line gg in FIG. 20(a). [Figure 21] 10A and 10B are diagrams illustrating a base part of another embodiment of the present invention, in which FIG. 10A is a longitudinal cross-sectional view of the base part, and FIG. 10B is a cross-sectional view taken along line hh in FIG. 10A. [Figure 22] This is another embodiment of the present invention, illustrating the base of an angle truss structure in which the tower-shaped portion is made of angle iron, where Figure (a) is a longitudinal cross-sectional view of the base, and Figure (b) is a cross-sectional view along line ii in Figure (a). [Figure 23] This is another embodiment of the present invention, illustrating the base of an angle truss structure in which the tower-shaped portion is made of angle iron, where Figure (a) is a longitudinal cross-sectional view of the base, and Figure (b) is a cross-sectional view along line jj in Figure (a). [Figure 24] This is another embodiment of the present invention, illustrating the base of an angle truss structure in which the tower-shaped portion is made of angle bars. Figure (a) is a longitudinal cross-sectional view of the base, and Figure (b) is a cross-sectional view along line kk in Figure (a). [Figure 25] This shows the joints between a steel pipe column and a horizontal unit material and upper and lower diagonal unit materials using connecting fittings, where Figure (a) is a front view and Figure (b) is a cross-sectional view along line ll in Figure (a). [Figure 26]This figure illustrates the joint between a steel pipe column and a horizontal unit member and upper and lower diagonal unit members using a joining plate attached to the steel pipe column by welding, and is a cross-sectional view of a steel pipe joint portion. DETAILED DESCRIPTION OF THE INVENTION

[0067] Figures 1 to 12 show one embodiment of the present invention, illustrating a tower-like structure constructed from a tower-like section A as an upper structure and a foundation section B as a lower structure that is formed integrally with the tower-like section A at the lower end of the tower-like section A and supports the tower-like section A.

[0068] [Tower-like part] The tower-shaped section A is a single steel pipe column, and the steel pipe column 1 is formed from multiple steel pipes joined together in the pipe axis direction, and the steel pipe located below it (hereinafter referred to as the ``lower steel pipe unit material 4'') and the steel pipe located above the lower steel pipe unit material 4 (hereinafter referred to as the ``upper steel pipe unit material 5'') are joined to each other by a joint steel pipe unit material 6 and multiple joint bolts 11.

[0069] The lower steel pipe unit material 4 and the upper steel pipe unit material 5 are formed from circular steel pipes or square steel pipes ("circular steel pipes" in this embodiment) of the same diameter, and the ends of each lower steel pipe unit material 4 and upper steel pipe unit material 5 are butted against each other in the pipe axis direction.

[0070] The joint steel pipe unit material 6 is formed from a circular steel pipe (a "square steel pipe" in the case of a square steel pipe column) with a smaller diameter than the lower steel pipe unit material 4 and the upper steel pipe unit material 5, and the lower part 6a below the middle part in the pipe axis direction of the joint steel pipe unit material 6 and the upper part 6b above are inserted into the upper end part of the lower steel pipe unit material 4 and the lower end part of the upper steel pipe unit material 5, respectively (see Figures 8(a) and 9(a)).

[0071] In addition, a gap S is formed between the inner walls of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 and the outer wall of the joint steel pipe unit material 6, with equal width in the pipe axial and circumferential directions of the joint steel pipe unit material 6.

[0072] The diameters and lengths of the lower steel pipe unit material 4, upper steel pipe unit material 5, and joint steel pipe unit 6 are standardized (standardized) into several types, which allows these components to be industrially manufactured. Furthermore, assembly on site does not require special skills, and even ordinary workers can carry out the work very efficiently. In addition, a positioning fitting 7 is attached to the outer wall of the joint steel pipe unit material 6 at the middle part in the pipe axis direction, which sets the joint steel pipe unit material 6 on the same pipe axis line as the lower steel pipe unit material 4 and the upper steel pipe unit material 5.

[0073] The positioning fittings 7 are attached at least three equally spaced locations around the circumferential direction of the joint steel pipe unit material 6. The joint steel pipe unit material 6 also has a horizontal rib 7a that protrudes horizontally from the peripheral wall of the joint steel pipe unit material 6 toward the butt end of the lower steel pipe unit material 4 and the upper steel pipe unit material 5, and upper and lower vertical ribs 7b, 7b that are attached symmetrically to both the upper and lower sides of the horizontal rib 7a and whose tips abut against the inner peripheral walls of the lower steel pipe unit material 4 and the upper steel pipe unit material 5.

[0074] The horizontal rib 7a and the upper and lower vertical ribs 7b, 7b are integrally formed and are attached to the outer peripheral wall of the joint steel pipe unit material 6 by welding or the like.

[0075] In addition, a notch 8 is formed at the butt joint of the end portions of the lower steel pipe unit material 4 and the upper steel pipe unit material 5, into which the horizontal rib 7a engages.

[0076] The horizontal ribs 7 a of each positioning fitting 7 fit into the notches 8 , so that the joint steel pipe unit material 6 is held in place at the joint between the lower steel pipe unit material 4 and the upper steel pipe unit material 5 .

[0077] In addition, since the tips of the upper and lower vertical ribs 7b, 7b of each positioning fitting 7 abut against the inner walls of the lower steel pipe unit material 4 and the upper steel pipe unit material 5, the joint steel pipe unit material 6 is set vertically on the same pipe axis line of the lower steel pipe unit material 4 and the upper steel pipe unit material 5, thereby positioning the lower steel pipe unit material 4 and the upper steel pipe unit material 5 vertically on the same pipe axis line.

[0078] In addition, multiple bolt holes 9 are formed in the lower portion 6a of the joint steel pipe unit material 6 and the upper end portion of the lower steel pipe unit material 4, and similarly, multiple bolt holes 9 are formed in the upper portion 6b of the joint steel pipe unit material 6 and the lower end portion of the upper steel pipe unit material 5.

[0079] The bolt holes 9 are formed at equal intervals in the circumferential direction and pipe axis direction on the peripheral walls of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 and on the peripheral wall of the joint steel pipe unit material 6, and are formed so as to communicate with the lower steel pipe unit material 4 and the upper steel pipe unit material 5 in the radial direction of the joint steel pipe unit material 6.

[0080] In addition, a plurality of joint nuts 10 are attached to the inner peripheral walls of the lower part 6a and upper part 6b of the joint steel pipe unit material 6, communicating with each bolt hole 9. The joint nuts 10 are integrally attached to the inner peripheral wall of the joint steel pipe unit material 6 by welding or adhesive.

[0081] Joint bolts 11 are then passed through the bolt holes 9 from the outside of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 and tightened into the joint nuts 10. This allows each lower steel pipe unit material 4 and upper steel pipe unit material 5 to be detachably joined to the joint steel pipe unit material 6 by the multiple joint bolts 11.

[0082] The length of the joint steel pipe unit material 6 and the diameter, number and spacing of the joint bolts 11 are optimally determined taking into consideration the bending and shear forces acting on the joint between the lower steel pipe unit material 4 and the upper steel pipe unit material 5.

[0083] In particular, adhesive or non-shrinkage mortar (hereinafter referred to as "adhesive") 12 is filled in the gap S between the inner walls of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 and the outer wall of the joint steel pipe unit material 6, thereby joining each lower steel pipe unit material 4 and upper steel pipe unit material 5 together completely and integrally (rigidly joined).

[0084] Symbol 13 is a gasket seal for preventing the adhesive 12 from leaking out of the gap S before it solidifies, and the gasket seal 13 is attached continuously to the lower end of the joint steel pipe unit material 6 in the circumferential direction of the joint steel pipe unit material 6, thereby sealing the lower end of the gap S formed between the outer wall of the joint steel pipe unit material 6 and the inner wall of the lower steel pipe unit material 4.

[0085] Although not specifically shown, packing seals 13 are also attached around each joint bolt 11 and at the butt joints at the ends of the lower steel pipe unit material 4 and the upper steel pipe unit material 5.

[0086] The method of filling the gap S with adhesive 12 involves placing a joint steel pipe unit 6 on the upper end of the lower steel pipe unit 4, and then erecting the upper steel pipe unit 5 on top of that. At this time, the lower end of the gap S and the butt joints between the lower steel pipe unit 4 and the upper steel pipe unit 5 are each sealed with a packing seal 13 beforehand.

[0087] The upper end of the joint steel pipe unit material 6 is closed with a lid (e.g., a plate-shaped lid) 14 made of steel, plastic, or the like (see Figure 10(a)). The upper end of the joint steel pipe unit material 6 may be left open and the lower end may be closed (see Figure 10(b)). In this case, the adhesive 12 is also filled inside the joint steel pipe unit material 6.

[0088] The lower steel pipe unit material 4 and the upper steel pipe unit material 5 are joined to the joint steel pipe unit material 6 by a plurality of joint bolts 11, and the periphery of each joint bolt 11 is sealed with a packing seal material.

[0089] The adhesive 12 can be reliably and efficiently filled into the narrow gap S by inserting an injection pipe 15 into the upper steel pipe unit member 5 and filling the gap. Also, by attaching tape or the like (not shown) as a visible memory display line to the inner surfaces (particularly the inner surfaces of the joint portions) of the lower steel pipe unit member 4 and the upper steel pipe unit member 5 to indicate the amount of adhesive 12 filled, or by measuring the amount of adhesive 12 to be filled in advance based on the volume of the gap S, the required amount of adhesive 12 can be reliably filled into the gap S without waste.

[0090] In this case, the filling of the adhesive 12 can be confirmed more accurately by checking the state of filling of the adhesive 12 both by visually checking the memory display line during filling and by measuring the amount of adhesive filled.

[0091] Furthermore, when filling the adhesive 12, the joint portion of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 can be struck from the outside with a wooden hammer (not shown) or the like to vibrate it, thereby preventing the entrapment of air bubbles, etc., and allowing the adhesive 12 to be filled densely.

[0092] 11 and 12 show a joint portion of a steel pipe pole 1 serving as a tower-like portion, which is made up of a plurality of lower and upper steel pipe unit materials having different diameters.

[0093] The upper steel pipe unit material 5 is formed with a smaller diameter than the lower steel pipe unit material 4. The upper steel pipe unit material 5 and the lower steel pipe unit material 4 are arranged on the same pipe axis, and the lower end of the upper steel pipe unit material 5 is inserted into the upper end of the lower steel pipe unit material 4 by a predetermined length.

[0094] Furthermore, a positioning fitting 16 is attached to the outer peripheral wall of the lower end of the upper steel pipe unit material 5 to set the lower steel pipe unit material 4 and the upper steel pipe unit material 5 vertically on the same pipe axis.

[0095] The positioning fitting 16 has a horizontal rib 16a that protrudes horizontally from the outer peripheral wall of the lower end of the upper steel pipe unit material 5 toward the upper edge of the lower steel pipe unit material 4, and a vertical rib 16b that is located below the horizontal rib 16a and whose tip abuts the inner peripheral wall of the lower steel pipe unit material 4, and is formed in an approximately T-shape when viewed from the side (see Figure 12(b)).

[0096] The horizontal rib 16a and the vertical rib 16b are integrally formed by welding and are attached integrally by welding or the like to the outer peripheral wall of the lower end of the upper steel pipe unit material 5. In addition, a groove-shaped notch 8 is formed in the upper edge of the lower steel pipe unit material 4, into which the tip of the horizontal rib 16a fits.

[0097] The horizontal ribs 16a of each positioning fitting 16 engage with the cutout portions 8 of the lower steel pipe unit material 4, thereby holding the upper steel pipe unit material 5 at the upper end of the lower steel pipe unit material 4, and the tips of the vertical ribs 16b of each positioning fitting 16 abut against the inner wall of the lower steel pipe unit material 4, thereby arranging the lower steel pipe unit material 4 and the upper steel pipe unit material 5 on the same pipe axis.

[0098] In addition, multiple bolt holes 9 are formed in the overlapping portion of the upper end of the lower steel pipe unit material 4 and the lower end of the upper steel pipe unit material 5. The bolt holes 9 are formed at equal intervals in the circumferential direction and pipe axis direction of the lower steel pipe unit material 4 and the upper steel pipe unit material 5, and are formed so as to communicate in the diameter direction of the lower steel pipe unit material 4 and the upper steel pipe unit material 5.

[0099] In addition, a plurality of joint nuts 10 are attached to the inner peripheral wall of the lower end of the upper steel pipe unit material 5, communicating with each bolt hole 9. The joint nuts 10 are integrally attached to the inner peripheral wall of the lower end of the upper steel pipe unit material 5 by welding or adhesive.

[0100] Then, joint bolts 11 are passed through each bolt hole 9 from the outside of the lower steel pipe unit material 4 and removably tightened to each joint nut 10, thereby removably joining each lower steel pipe unit material 4 and each upper steel pipe unit material 5 to each other.

[0101] The diameter, number, pitch, etc. of the joint bolts 11 are optimally determined taking into consideration the shear force acting on the joint between the lower steel pipe unit material 4 and the upper steel pipe unit material 5.

[0102] In particular, adhesive 12 is filled in the gap S where the upper end of the lower steel pipe unit material 4 and the lower end of the upper steel pipe unit material 5 overlap, thereby joining the ends of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 together completely and rigidly.

[0103] In addition, a packing seal 13 that seals the lower end of the gap S between the lower steel pipe unit material 4 and the upper steel pipe unit material 5 is attached continuously in the circumferential direction of the upper steel pipe unit material 5 to the outer peripheral wall of the lower end of the upper steel pipe unit material 5. Although not specifically shown, the packing seal 13 is also attached around each joint bolt 11.

[0104] To fill the gap S with adhesive 12, the lower end of the upper steel pipe unit material 5 is erected onto the upper end of the lower steel pipe unit material 4. The lower end of the gap S is then closed, and the upper end of the lower steel pipe unit material 4 and the lower end of the upper steel pipe unit material 5 are joined with a plurality of joint bolts 11. Then, adhesive 12 is filled into the gap S from the upper end of the lower steel pipe unit material 4 using an injection pipe or the like.

[0105] [Foundation] The foundation section B is formed in the shape of a polygonal frame such as a circle, a rectangle, or a hexagon when viewed from above, and is composed of a plurality of foundation steel column unit materials 31 erected at equal intervals around the steel pipe column 1 below the ground surface surrounding the base of the tower-shaped section A (hereinafter referred to as "steel pipe column 1"); a plurality of foundation panel unit materials 19a adjacent to each other in the circumferential and vertical directions of the steel pipe column 1 outside the plurality of foundation steel column unit materials 31 and arranged continuously in the circumferential and vertical directions of the steel pipe column 1; a plurality of foundation steel beam unit materials 27 erected radially between each foundation steel column unit material 31 and the steel pipe column 1; and, as necessary, a plurality of foundation steel brace unit materials 40 (see Figure 3) erected between each foundation steel column unit material 31 and the steel pipe column 1, and between adjacent foundation steel columns 31, 31.

[0106] In addition, the foundation steel beam unit material 27 and the foundation steel brace unit material 40 are erected to form a truss structure between the lower steel pipe unit material 4 that constructs the lower end of the steel pipe column 1 and each foundation steel column unit material 31.

[0107] In addition, the foundation steel beam unit material 27, the foundation steel column unit material 31 and the foundation steel brace unit material 40 are made of structural steel or steel pipes such as H-shaped steel, I-shaped steel, L-shaped steel or CT (cut T) steel, and in particular the foundation steel column unit material 31 is fixed to the ground on the back side by anchor material 32 (see Figures 6(a) and (b)), and a simple jack 33 such as a screw-type jack is attached to the foundation steel beam unit material 27 to prepare for surrounding earth pressure (see Figures 4(a) and (b), etc.).

[0108] Furthermore, a foundation unit material 34 made of a concrete block or a steel plate (base plate) or the like is installed at the lower end of the steel pipe column 1 (see Figures 1 and 3), and the lower end of the steel pipe column 1, i.e., the lower end of the lower steel pipe unit material 4 (see Figure 7 etc. described later) that constructs the lower end of the steel pipe column 1, is fixed to the foundation unit material 34 by an angle material 35 made of an L-shaped steel or the like and a plurality of fixing bolts 36 (see Figures 2(a) and (b)). The angle material 35 is fixed to the top of the foundation unit material 34 by welding or anchor bolts (not shown).

[0109] In addition, instead of the foundation unit material 34, a foundation slab 23 is formed over the entire bottom of the foundation formwork consisting of the foundation steel column unit material 31 and the foundation panel unit material 19a (see Figures 3(a) and (b)), and in this case, the lower end of the steel pipe column 1, i.e., the lower end of the lower steel pipe column 4 arranged at the lower end of the steel pipe column 1, is fixed on top of the foundation slab 23.

[0110] Furthermore, backfill soil (excavated soil on site) is filled into the formwork formed by the foundation steel column unit material 31 and the foundation panel unit material 19a as required.

[0111] In particular, by radially erecting multiple foundation steel beam unit materials 27 between each foundation steel column unit material 31 and steel pipe column (lower end steel column unit material) 1, and filling backfill soil into a formwork consisting of the foundation steel column unit material 31 and foundation panel unit material 19a, the multiple foundation steel beam unit materials 27 will have a structure similar to tree roots, and the resistance force due to the weight of the backfill soil against the pull-out force acting on the steel pipe column 1 will increase, which is expected to have effects such as an increase in the resistance moment against the bending moment acting on the foundation part B.

[0112] In addition, by attaching a simple jack 33 such as a screw jack to each foundation steel beam unit material 27 to prepare for surrounding earth pressure and adopting a mechanical construction method in which each foundation steel column unit material 31 is pressed against the surrounding ground, passive earth pressure can be effectively utilized and the erection accuracy (verticality) of the foundation steel column unit material 31 can be adjusted (see Figures 4(a) and (b)).

[0113] Furthermore, by fixing the lower end side of each foundation steel column unit material 31 to the ground on the rear side with anchor materials 32, it is possible to expect pull-out resistance that utilizes the "adhesion of the undisturbed soil" against the pull-out force acting on the steel pipe column (tower-shaped section A) 1. In this case, the pull-out resistance of the anchor materials 32 can be increased by installing the anchor materials 32 diagonally downward into the ground on the rear side.

[0114] The foundation panel unit material 19a is formed into a rectangular plate shape around the steel pipe column 1, and is unitized around the steel pipe column 1 and in the vertical direction in a shape and size that makes it easy to carry and assemble by hand.In addition, the assembly and joining work on site is minimized as much as possible, thereby standardizing the assembly and joining work and preventing quality variations.

[0115] In addition, it is designed so that even ordinary workers without particular skills can easily assemble and join it using fixing fittings for fixing it to the foundation steel column unit material 31 and other connecting fittings.

[0116] Furthermore, the foundation panel unit material 19a is formed from thin steel plate (such as a thin steel plate of about 1 mm), thin corrugated steel plate, or mesh steel plate (such as a mesh panel) in a size that can be easily carried by hand.

[0117] In addition, the shapes and sizes of the foundation panel unit material 19a, fixing fittings, and other connecting fittings are unified (standardized) into several types depending on the scale (height, diameter, etc.) of the steel pipe column 1 and the ground conditions of the installation ground, etc., thereby making it possible to industrialize the parts and components that make up the foundation, and also making it possible for ordinary workers to carry out construction very efficiently without requiring special skills for on-site assembly, etc.

[0118] Next, a construction method for the foundation B of the tower-like structure shown in FIG. 3 will be described (see FIGS. 7(a) to (e)). (1) First, the frame (framework) 41 of the foundation section B is constructed by assembling each of the foundation unit materials, such as the lower steel pipe unit material 4, foundation steel column unit material 31, foundation steel beam unit material 27, and foundation steel brace unit material 40, which construct the lower end of the manufactured steel pipe column 1 on the ground on which the tower-like structure will be constructed (see Figures (a) and (b)). (2) In addition, multiple foundation panel unit materials 19a are installed around the outer periphery of the frame 41 while being joined together in the circumferential and vertical directions of the frame 41 to assemble a foundation formwork 42 that is continuous around the frame 41 (see Figures (a) and (b)).

[0119] (3) Next, once the assembly of the foundation formwork 42 is complete, the frame 41 inside the foundation formwork 42 is dismantled and removed. At this time, the frame 41 is removed so as not to interfere with the excavation work, but it is preferable to leave a portion of it as support material for the foundation formwork (foundation panel unit material 19a) 42. (4) Next, the ground inside the foundation formwork 42 is excavated evenly across the entire surface to gradually sink the foundation formwork (foundation panel unit material 19a) 42 (see Figures (c) and (d)). In this case, by forming a blade at the bottom end of the foundation formwork (foundation panel unit material 19a) 42, the foundation formwork (foundation panel unit material 19a) 42 can be efficiently sunk (see Figures (c) and (d)). (5) Next, the foundation formwork (foundation panel unit material 19a) 42 is lowered to a predetermined supporting ground surface, and then the foundation slab 23 is formed on the supporting ground surface, and the framework of the foundation section B is reassembled on top of it (see Figure (e)). Then, excavated soil is filled between the foundation formwork (foundation panel unit material 19a) 42 and the lower steel pipe 4.

[0120] Figures 13 to 16 show other embodiments of the present invention, and in particular the tower-shaped section A as the upper structure is constructed in the shape of a tower that is approximately an equilateral triangle in plan view and has a cross section of approximately the same diameter from the ground to the top, from a plurality of steel pipe columns 1 erected at intervals and a plurality of horizontal unit members 2 and diagonal unit members 3 erected between each steel pipe column 1,1.

[0121] Each steel pipe column 1 is constructed from a plurality of lower steel pipe unit materials 4 and upper steel pipe unit materials 5 arranged adjacent to each other in the pipe axial direction, and each lower steel pipe unit material 4 and upper steel pipe unit material 5 is joined to a joint steel pipe unit material 6 by a plurality of joint bolts 11.

[0122] In addition, the size, shape, shape of connecting members such as positioning fittings 7, bolt hole positions, etc. of the lower steel pipe unit material 4, upper steel pipe unit material 5 and joint steel pipe unit material 6, and the connecting method between each lower steel pipe unit material 4 and upper steel pipe unit material 5 are as described in Figures 8 to 12.

[0123] The foundation portion B is formed integrally and continuously in the shape of a roughly circular frame in plan view from the column base foundations 17 formed at the column base of each steel pipe column 1 and a plurality of foundation beams (including continuous foundations) 18 formed between each column base foundation 17, 17.

[0124] Each column base foundation 17 and foundation beam 18 is formed integrally with the column base of each steel pipe column 1, foundation formwork 19 placed below the ground surface between each column base, and concrete 20 poured into the foundation formwork 19. In addition, reinforcing steel bars (not shown) are arranged in the concrete 20, and each column base foundation 17 and foundation steel beam 18 is fixed to the ground by multiple underground anchors 21.

[0125] The foundation formwork 19 is composed of outer foundation panel unit materials 19a (hereinafter referred to as "outer formwork 19a") and inner foundation panel unit materials (hereinafter referred to as "inner formwork 19b") which are installed continuously in the form of an approximately circular frame in plan view on the outside and inside of each steel pipe column 1, sandwiching each steel pipe column 1 between the base of each steel pipe column 1 and each adjacent column base, and a plurality of FormTie (registered trademark) bolts 22 which are installed between the outer formwork 19a and the inner formwork 19b and connect the outer formwork 19a and the inner formwork 19b to each other.

[0126] The outer formwork 19a and the inner formwork 19b are both formed as rectangular plates in the circumferential direction of the tower-shaped section A, and are unitized in the circumferential and vertical directions of the tower-shaped section A in a shape and size that makes them easy to carry and assemble by hand, and are also formed so that even ordinary unskilled workers can easily assemble and join them using Form Tie (registered trademark) bolts 22 and other connecting fittings.

[0127] In addition, the shapes and sizes of the outer formwork 19a, inner formwork 19b, Form Tie (registered trademark) bolts 22 and other connecting fittings are unified (standardized) into several types depending on the scale (height, diameter, etc.) of the tower-shaped section A and the ground conditions of the installation ground, etc., thereby making it possible to industrialize the parts and components that make up the foundation, and also making it possible for ordinary workers to carry out construction very efficiently without requiring special skills for on-site assembly, etc.

[0128] In addition, the inner formwork 19b arranged around the inside of each steel pipe column 1 is formed in a shape that bulges out greatly inward of the foundation formwork 19, roughly in a U-shape when viewed from above, along the outer surface of the steel pipe column 1 (see Figures 15(a) and 16(a)).

[0129] Moreover, both the outer formwork 19a and the inner formwork 19b are made of thin steel plate, thin corrugated steel plate, or mesh steel plate (mesh panel, etc.) and are formed to a size that allows them to be easily carried by human power.

[0130] The outer formwork 19a and inner formwork 19b formed and arranged in this manner are joined to each other by a plurality of FormTie (registered trademark) bolts 22, and are fixed to the base of each steel pipe column 1 by a plurality of FormTie (registered trademark) bolts 22 (see Figures 15(a) and 16(a)).

[0131] When installing the outer formwork 19a and the inner formwork 19b, no support material is required to hold the outer formwork 19a and the inner formwork 19b in a generally circular shape in plan view, as the lower steel pipe unit material 4 that constructs the lower end of the steel pipe column 1 is used as a support member. Furthermore, the outer formwork 19a and the inner formwork 19b are formed so that they can be bent and deformed by human power alone while maintaining the strength required for foundation formwork.

[0132] Furthermore, the column base foundation 17 can be omitted. In this case, an outer formwork 19a and an inner formwork 19b may be arranged on the outside and inside of each column base in parallel to the circumferential direction of the foundation formwork 19.

[0133] Concrete 20 is then poured between the outer formwork 19a and the inner formwork 19b, and in the case of a particularly simple temporary structure, soil cement or the like is poured.

[0134] Furthermore, if the planar shape of the base portion B is a frame shape that is approximately circular in plan view, this is particularly preferable as it significantly increases the resistance of the tower-shaped portion serving as the upper structure against tipping over, making the structure more stable.

[0135] In addition, the inside of the foundation section B can be filled with excavated soil from the site to create a planting space such as a flower bed, or concrete can be poured into the surrounding column base foundations 17 and foundation beams 18, or a foundation slab 23 can be formed at the bottom and filled with water to create a heavy body that prevents the tower-like structure from tipping over, or it can be used as a fire prevention water tank in urban areas, etc.

[0136] The inside of the foundation B may be left as an open space, or a foundation slab 23 and a roof slab (not shown) may be provided to create an evacuation shelter in the event of a mountain disaster.

[0137] The foundation slab 23 can be omitted if the design conditions of the foundation portion B allow it to be designed to withstand the foundation reaction force with passive earth pressure alone.

[0138] Next, the construction method of the foundation part B shown in Figures 15(a) and (b) will be explained. In particular, when construction is performed by the caisson method, construction can basically be performed according to the construction procedure explained in Figures 7(a) to (b). In addition, an outer foundation panel unit material (outer formwork) 19a and an inner foundation panel unit material (inner formwork) 19b are installed as foundation formwork.

[0139] To be more specific, (1) First, on the ground, outer and inner formworks 19a and 19b are placed around the circumference of the tower-shaped section A on the outside and inside of the lower steel pipe unit members 4, sandwiching the lower steel pipe unit members 4 between the bases of the steel pipe columns 1, i.e., the lower ends of the steel pipe columns. Next, adjacent outer formworks 19a and adjacent inner formworks 19b are joined to each other. The outer formworks 19a and the inner formworks 19b are joined to each other with a plurality of Form-Tie (registered trademark) bolts 22, and a continuous foundation formwork 19 is assembled in the shape of a frame that is generally circular in plan view.

[0140] The outer formwork 19a and the inner formwork 19b are stacked in multiple layers depending on the depth of the foundation B. At this stage, the lower steel pipe unit material 4 and the upper steel pipe unit material 5 of each steel pipe column 1 are joined in about one or two layers.

[0141] (2) Next, the necessary amount of reinforcing steel bars (not shown) are placed within the foundation formwork 19, and concrete 20 is poured to form the foundation section B in which each column base foundation 17 and each foundation beam 18 are connected in a roughly circular frame shape when viewed from above. (3) Next, the ground directly below and inside the foundation B (each column base foundation 17 and foundation beam material 18) is excavated evenly and soil is removed, causing the foundation B to gradually sink to the excavated ground surface under its own weight. Then, a foundation slab 23 is formed at the bottom of the excavation.

[0142] (4) To form a deep fire-fighting water tank or the like (see Figures 16(a) and (b)), the area directly below and inside the foundation B (each column base foundation 17 and foundation beam 18) is dug further to gradually sink the foundation B to the required depth. (5) At the same time, outer and inner formworks 19a and 19b of the foundation formwork 19 are stacked in sequence on top of each of the column base foundations 17 and foundation beams 18, and concrete 20 is poured into them to form foundation B (column base foundations 17 and foundation beams 18) that is continuous in the circumferential and vertical directions of foundation B. Then, a foundation slab 23 is formed at the bottom of the excavated area (see Figures 16(a) and (b)).

[0143] Thereafter, by repeating the excavation and formation of the foundation portion B in the same manner up to the set depth, the foundation portion B can be formed to the set depth.

[0144] According to this construction method, the foundation section B (each column base foundation 17 and foundation beam 18) also serves as a retaining wall to prevent the collapse of the ground and subsidence of the surrounding ground, making construction safer. Furthermore, the finished product is hardly affected by the skill of the construction worker, ensuring consistent quality at all times.

[0145] In particular, by digging the inside of foundation B using a method similar to the manual caisson construction method, passive earth pressure on the side of the foundation of the tower-like structure can be effectively applied without disturbing the surrounding soil, ensuring a constant level of stability against tipping. Note that the column base foundation 17 may be formed to a certain height above the bottom of the excavation, and only the foundation beams 18 may be formed as a retaining wall continuing down to the ground surface.

[0146] Figures 17 to 24 illustrate other embodiments of the present invention, and in all embodiments, there are multiple lower steel pipe unit materials 4 that construct the lower end of each steel pipe column 1, a foundation formwork 19 arranged around the lower steel pipe unit materials 4, and structural steel column unit materials 24, foundation steel beam unit materials 25, and foundation steel beam unit materials 26 arranged inside the foundation formwork 19 (here, this means "inside the framework of the foundation formwork 19 assembled in an approximately circular shape when viewed in plan").

[0147] Specifically, the foundation formwork 19 is arranged in the shape of a substantially circular frame in plan view so as to surround one or more steel pipe columns 1 or structural steel column unit materials 24. The foundation formwork 19 is composed of an outer formwork 19a, an inner formwork 19b, and a plurality of Form-Tie (registered trademark) bolts 22 that connect the outer formwork 19a and the inner formwork 19b (see Figure 15(a)). Furthermore, reinforcing steel bars (not shown) are arranged inside the foundation formwork 19, and concrete is poured into it.

[0148] In particular, in the foundation part B shown in Fig. 17, steel pipe columns 1 are erected at points corresponding to the vertices of a substantially regular triangle in plan view assumed within the foundation formwork 19. Furthermore, foundation steel beam unit materials 25 are erected in the form of a frame of a substantially regular triangle in plan view between lower steel pipe unit materials 4, 4 that construct the lower end portions of adjacent steel pipe columns 1, 1, and furthermore, foundation steel beam unit materials 26 are erected between each steel pipe column 1 and the foundation steel beam unit material 25 facing said steel pipe column 1.

[0149] Both ends of each foundation steel beam unit material 25 and the end of the foundation steel beam unit material 26 on the foundation steel beam unit material 25 side are each extended to the peripheral wall of the foundation formwork 19 and are respectively joined to the side of the steel pipe column 1 and the peripheral wall of the foundation formwork 19.

[0150] In addition, in the foundation portion B shown in Figures 18 and 19, lower steel pipe unit materials 4 that construct the lower end of the steel pipe column 1 are erected at points corresponding to each vertex of an approximately regular triangle in plan view that is imagined within the foundation panel unit materials 19a that are continuously arranged in a frame shape that is approximately circular in plan view.

[0151] In addition, foundation steel beam unit materials 37, 37 are arranged between the column bases of adjacent steel pipe columns 1, 1, i.e., between the lower steel pipe unit materials 4, 4 that construct the lower end of each steel pipe column 1, 1, and foundation steel beam unit materials 38, 38 are arranged in multiple rows between each foundation steel beam unit material 37, 37, all of which are arranged to form a plane truss.

[0152] In addition, foundation steel beam unit materials 39 are arranged in multiple rows between the middle part of each foundation steel beam unit material 37 and the foundation steel column unit material 31, and the lower end part of each steel pipe column 1, i.e., the lower steel pipe unit material 4, is each joined to the nearby foundation steel column unit material 31.

[0153] Furthermore, the foundation panel unit materials 19a, which are continuously arranged in a substantially circular frame shape in plan view, are filled with a solidifying material such as concrete or soil cement, or excavated soil from the site, as required.

[0154] In the foundation part B shown in FIG. 20, foundation formwork 19 is arranged in the shape of a frame that is approximately circular in plan view at three points corresponding to the vertices of an assumed approximately equilateral triangle in plan view.

[0155] In addition, a foundation formwork 19 is installed around the lower steel pipe unit material 4 that constructs the lower end of each steel pipe column 1, and multiple foundation steel beam unit materials 27 are erected radially in a plan view between each steel pipe column 1 and the peripheral wall of the foundation formwork 19, with both ends of each being joined to the side of the steel pipe column 1 and the peripheral wall of the foundation formwork 19, respectively.

[0156] FIG. 21 illustrates a base portion formed at the column base of a steel pipe column 1 as a tower-shaped portion, and is formed with a configuration substantially similar to that of the base portion B of the tower-shaped portion illustrated in FIG.

[0157] That is, the foundation formwork 19 is installed in the shape of a substantially circular frame in plan view around the steel pipe column 1. In addition, a plurality of foundation steel beam unit materials 27 are erected between the steel pipe column 1 and the peripheral wall of the foundation formwork 19 in a radial manner in plan view, and both ends of each foundation steel beam unit material 27 are joined to the side of the steel pipe column 1 and the peripheral wall of the foundation formwork 19, respectively.

[0158] In the foundation part B of the tower-shaped part shown in Fig. 22, shaped steel columns 24 are erected instead of steel pipe columns at each point corresponding to each vertex of a roughly regular square in plan view assumed within the foundation formwork 19. Furthermore, foundation steel beam unit materials 25 are erected between the column bases of adjacent shaped steel columns 24, 24 in the form of a roughly regular square frame in plan view (a grid shape). Furthermore, foundation beam unit materials 26 are erected through the side parts of each shaped steel column 24, parallel to the diagonal direction of the roughly regular square frame in plan view formed by the foundation beam unit materials 25.

[0159] The structural steel column 24 is constructed by joining together in the axial direction a plurality of upper structural steel unit materials and lower structural steel unit materials made of structural steel such as H-shaped steel or L-shaped steel, and each upper structural steel unit material and lower structural steel unit material are joined together by a plurality of joining plates and joining bolts.

[0160] In addition, both end sides of the foundation steel beam unit material 25 and the foundation steel beam unit material 26 are extended to the peripheral wall of the foundation formwork 19 and are joined to the side of the steel column 24 and the peripheral wall of the foundation formwork 19, respectively.

[0161] In the foundation B shown in Figure 23, a plurality of structural steel columns 24 are erected in the foundation formwork 19 at intervals in the circumferential direction of the foundation formwork 19. In addition, a column base foundation 17 is formed at the column base of each structural steel column 24.

[0162] 24, foundation formwork 19 is arranged in the form of a frame that is approximately circular in plan view at four points corresponding to the vertices of an assumed approximately regular square in plan view, and a shaped steel column unit material 24 is erected inside each foundation formwork 19. Furthermore, a plurality of foundation steel beam unit materials 27 are erected radially between the shaped steel columns 24 and the peripheral wall of the foundation formwork 19, and both ends of the foundation steel beam unit materials 27 are joined to the side parts of the shaped steel columns 24 and the peripheral wall of the foundation formwork 19, respectively.

[0163] In any embodiment, the shape, size, etc. of the foundation formwork 19 (outer formwork and inner formwork, Form-Tie (registered trademark) bolts and other connecting fittings, etc.) and the shape, dimensions, etc. of the foundation steel beam unit materials 25, 26, 27 and the connecting fittings connecting the foundation steel beam unit materials 25, 26 and 27 are unified to one or several types (standardized, normalized) depending on the scale (height, diameter, etc.) of the tower-shaped section A, the ground conditions of the installation ground, etc.

[0164] This simplifies and reduces the labor required for on-site construction in densely populated areas where vehicles have difficulty entering, or in mountainous regions that are difficult to access. Assembly, etc., does not require special skills, and can be carried out extremely efficiently by ordinary workers.

[0165] The space between the steel pipe column 1 or structural steel column 24 and the foundation B is filled with concrete, soil cement, or locally excavated soil. It can also be used as a fire-fighting water tank by pouring water into it. The foundation formwork 19, steel pipe column 1, foundation steel beam unit materials 25, 26, and foundation steel beam unit material 27 may be assembled on-site, but assembling them as industrial products in a factory or the like improves quality and prevents the generation of waste materials.

[0166] In addition, angle-shaped and H-shaped steel are used for the upper and lower steel column unit materials 4, 5 that make up the steel column 24, and steel beams such as H-shaped steel are used for the foundation steel beam unit materials 25, 26 and 27, and are arranged in multiple stages depending on the depth of the foundation portion B to be formed.

[0167] [Connections between steel pipe columns and horizontal and diagonal unit members] 25 and 26 show the joint between a steel pipe column 1 and a horizontal unit member 2 and upper and lower diagonal unit members 3, 3 joined to the side of the steel pipe column 1.

[0168] In Figure 25, the horizontal unit member 2 is installed horizontally between the joint between the lower steel pipe unit member 4 and the upper steel pipe unit member 5 of adjacent steel pipe columns 1, 1, and the upper and lower diagonal unit members 3, 3 are installed diagonally between the upper and lower joints between the lower steel pipe unit member 4 and the upper steel pipe unit member 5, thereby constructing the tower-shaped section A as a truss structure viewed from the side that is continuous in the vertical direction.

[0169] In addition, both ends of each horizontal unit member 2 and both upper and lower ends of the upper and lower diagonal unit members 3, 3 are joined to the joints between the lower steel pipe unit member 4 and the upper steel pipe unit member 5 via joining fittings 28 and multiple joining bolts 29.

[0170] The connecting fitting 28 is attached to the joint between the lower steel pipe unit material 4 and the upper steel pipe unit material 5 in the pipe axis direction along the outer peripheral surfaces of the lower steel pipe unit material 4 and the upper steel pipe unit material 5, and is fastened to the outer peripheral walls of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 by a plurality of connecting bolts 11. The connecting bolts 11 also serve as connecting bolts that join the lower steel pipe unit material 4 and the upper steel pipe unit material 5.

[0171] The connecting fitting 28 has an attachment portion 28a bolted to the outer walls of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 by a plurality of joint bolts 11, and connecting portions 28b, 28b formed on both side edge ends of the attachment portion 28a, where the ends of the horizontal unit material 2 and the upper and lower diagonal unit materials 3, 3 are respectively connected by connecting bolts 29.

[0172] The mounting portion 28a is formed in an arc shape in the circumferential direction of the lower steel pipe unit material 4 and the upper steel pipe unit material 5 along the outer surfaces of the lower steel pipe unit material 4 and the upper steel pipe unit material 5, and multiple bolt holes are formed at both edge ends of the mounting portion 28a and at the joint portions 28b, 28b, through which the joint bolts 11 and the joint bolts 29 pass, respectively.

[0173] The metal joint 28 can be easily formed from a single steel plate, and the central attachment portion 28a and the joint portions 28b, 28 at both ends can be easily formed by bending.

[0174] In addition, the horizontal unit material 2 and the upper and lower diagonal unit materials 3, 3 are both formed from angle irons (angle steel) or channel steel, and the horizontal unit material 2 and the upper and lower diagonal unit materials 3, 3 can both be used together in pairs as shown in the figure.

[0175] As with the foundation section B, the diameters and lengths of the horizontal unit members 2 and the upper and lower diagonal unit members 3, the shape and dimensions of the connecting fittings 28, and the diameters of the connecting bolts 29 can be standardized into multiple types according to the scale (height, diameter, etc.) of the tower-shaped section A and the site conditions (area, elevation difference, etc.) on which the tower-shaped section A is to be constructed, thereby reducing the manufacturing costs of these members and parts and enabling shorter, more labor-saving, and simplified construction on site.

[0176] Alternatively, as shown in Figure 26, a simple joining method may be used in which a connecting plate 30 is directly welded to the outer walls of the lower steel pipe unit material 4 and the upper steel pipe unit material 5, and the ends of the horizontal unit material 2 and the upper and lower diagonal unit materials 3, 3 are bolted to the connecting plate 30 with connecting bolts 29. [Industrial Applicability]

[0177] The present invention realizes the industrialization of the foundation by integrating the foundation that supports the tower-shaped portion as the upper structure with the tower-shaped portion, and standardizing (standardizing) the shape, size, etc. of the foundation into multiple types depending on the scale (height, diameter, etc.) of the tower-shaped portion, the site conditions (area, elevation difference, etc.) of the foundation, the ground conditions, etc. This reduces the manufacturing costs of the members and parts that make up the foundation, and enables shortened, labor-saving, and simplified construction on site.Even in places such as densely populated areas where vehicles cannot easily enter or mountainous areas that are difficult to access, the foundation can be constructed efficiently and at low cost in a short period of time using almost only human labor, without the need for large heavy machinery or special skills. [Explanation of symbols]

[0178] A Tower-shaped part, B Foundation part, S Gap part 1 Steel pipe column (steel column), 2 Horizontal unit material, 3 Diagonal unit material, 4 Lower steel pipe unit material (lower steel column unit material), 5 Upper steel pipe unit material (upper steel column unit material), 6 Joint steel pipe unit material, 7 Positioning fitting, 7a Horizontal rib, 7b Vertical rib, 8 Notch, 9 Bolt hole, 10. Joint nut, 11. Joint bolt, 12 Adhesive or non-shrink mortar, 13 packing and sealing material, 14 lid, 15 filling tube, 16 positioning metal fittings, 17 column base foundation, 18 Foundation beams (including slab foundations), 19 Foundation formwork, 19a Outer formwork (outer foundation panel unit material), 19b Inner formwork (inner foundation panel unit material), 20 Concrete, 21 Ground anchor, 22 Form Tie (registered trademark) bolt, 23 Foundation slab, 24 Steel column, 25, 26, 27 Foundation steel beam unit material, 28 Joint metal fittings, 29 Joint bolt, 30 Joint plate, 31 Foundation steel column unit material, 32 Anchor material, 33 Simple jack, 34 Foundation unit material, 35 Angle iron, 36 Fixing bolt, 37 Foundation steel beam unit material, 38, 39 Foundation steel beam unit material, 40 Foundation steel brace unit material, 41 Foundation frame, 42 Foundation formwork.

Claims

1. A tower-like structure comprising a steel tower-like section in which a plurality of steel columns, each of which is made up of a lower steel column unit material and a plurality of upper steel column unit materials joined together in the axial direction, are arranged at intervals, and a foundation section that is arranged integrally with the tower-like section at the lower end of the tower-like section, The foundation portion includes a foundation slab placed at the bottom of the excavated ground, and a plurality of foundation panel unit materials arranged in a cylindrical shape on the foundation slab, a tower-like structure characterized in that the foundation panel unit materials are arranged in a double configuration with an outer foundation panel unit material and an inner foundation panel unit material placed inside it at a distance, the multiple lower steel column unit materials constituting the lower ends of each steel column are connected between the outer foundation panel unit material and the inner foundation panel unit material placed inside it with formwork fastening fittings equipped with separators and fastening fittings, a solidifying material is filled into the foundation formwork formed by the outer foundation panel unit material and the inner foundation panel unit material, so that when the solidifying material solidifies, the foundation formwork and the solidifying material filled in the foundation formwork form a column base foundation at the lower end of each steel column, and a foundation beam integrated with the column base foundation is formed between each of the column base foundations, and the inner foundation panel unit materials are arranged in an approximately U-shape when viewed from above along the outer peripheral surface of the lower steel column unit material.

2. 2. A tower-like structure according to claim 1, characterized in that the outer foundation panel unit material and the inner foundation panel unit material are formed to a size and shape that allows them to be transported, assembled, and joined by workers' manual labor without the use of heavy machinery.

3. 2. A tower-like structure according to claim 1, wherein the inside of said foundation panel unit material is filled with soil.

4. 2. A tower-like structure according to claim 1, wherein the lower steel column unit material and the upper steel column unit material are formed from steel pipes, H-shaped steel, channel steel or angle steel.

5. 2. A tower-like structure according to claim 1, wherein the column base foundation and the foundation beam are each fixed to the ground by a plurality of underground anchors.

6. 6. A tower-like structure according to any one of claims 1 to 5, wherein the tower-like portion has the plurality of steel columns and a plurality of horizontal members and diagonal members erected between the steel columns, and is configured in an approximately triangular, approximately quadrangular, or approximately polygonal shape when viewed from above.

7. A method for constructing a tower-like structure according to any one of claims 1 to 5, A method for constructing a tower-like structure, comprising the following steps: (1) A process of arranging the plurality of lower steel column unit materials on the ground at intervals in the circumferential direction of the tower-shaped portion. (2) A process of arranging the outer foundation panel unit material and the inner foundation panel unit material continuously in the circumferential direction of the tower-shaped portion between the lower steel column unit materials. (3) A process of connecting the outer foundation panel unit material and the inner foundation panel unit material to each other to form the foundation formwork that is continuous in the circumferential direction of the tower-shaped portion. (4) A process of filling the foundation formwork with solidifying material to form a foundation portion that is continuous around the circumference of the tower-shaped portion. (5) A process of digging down the ground directly below and inside the foundation to cause the foundation to sink. (6) The process of forming a foundation slab at the bottom of the excavated ground.

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