Buildings and their construction methods

Abstract

To provide a building in which at least the side wall of the building and soil-cement columnar continuous wall constructed around the building are joined to each other, and in which the soil-cement columnar continuous wall has high resistance to both push-in and pull-out loads from the building and the core material has a good built-in property into soil cement, and a construction method of the building.SOLUTION: A building 200 is provided, including: at least a side wall 15 of the underground portion 11 of a building 10 within the ground G; and a soil cement column-type continuous wall 20 placed around building 10, which are joined to each other. The soil-cement column-type continuous wall 20 has a core material 40 buried inside the soil cement 30. An inclined plate 60 which is inclined laterally and upwardly is joined to at least a portion below the core material 40.SELECTED DRAWING: Figure 4

Description

Technical Field

[0005] , ,

[0006]

[0001] The present invention relates to a building and a construction method thereof.

Background Art

[0002] The retaining wall includes prefabricated sheet pile walls such as parent pile horizontal sheet pile walls and steel sheet pile walls, and site-cast walls such as column row retaining walls and continuous diaphragm walls. The column row retaining wall includes site-cast reinforced concrete column row retaining walls, steel pipe column row retaining walls, soil cement column row retaining walls (soil cement column type continuous walls), and the like. <00000ll> For example, the above-mentioned soil cement column type continuous wall is a temporary structure, but there is also a form in which it is connected to the side wall of the underground part of a building, which is a permanent structure, so that the soil cement column type continuous wall is used as part of the foundation of the building, which is a permanent structure. Thus, by using the soil cement column type continuous wall not only as a retaining wall but also as part of the foundation of the permanent structure, the structure of the foundation of the permanent structure can be made simpler. For example, the amount of concrete and the amount of steel bars in the foundation can be reduced, so that a significant reduction in construction costs can be achieved.

[0004] [[ID=I9]] Here, a specific configuration of a form in which the above-mentioned soil cement column type continuous wall is used as part of the foundation of a building, which is a permanent structure, will be described with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal sectional view showing an example of a building, and FIG. 2 is a view taken in the direction of arrow II-II of FIG. 1.

[0005] The building 100 in the illustrated example is configured by joining the side wall 15 and the chassis 17 of the underground part 11 of the building 10 in the ground G and the soil cement column type continuous wall 20 constructed around the building 10. For example, a soil cement column type continuous wall 20 in a rectangular frame shape in plan view is constructed around the side wall 15 of the underground part 11 of the building 10 having a rectangular shape in plan view, and the two are joined at a plurality of locations. FIG. 1 shows only a part of the side wall 15, the chassis 17, and the column 16 of the building 10.

[0006] The soil-cement column-type continuous wall 20 is constructed such that parts of the circular soil-cement 30 overlap each other in plan view, and a core material 40 made of H-shaped steel is embedded inside the soil-cement 30 within the circular borehole G1 in plan view. The core material 40 has a web 41, a first flange 42 on the building 10 side, and a second flange 43 on the opposite side of the building 10.

[0007] Of the core material 40 embedded in the soil cement 30, multiple stud dowels 50 are joined to the upper first flange 42 on the building 10 side by welding or the like, causing them to protrude laterally. The protruding stud dowels 50 are embedded in the side wall 15 and base 17 of the underground section 11, thereby integrating the building 10 with the soil cement column-type continuous wall 20. The weight of the building 10 and the compressive forces generated when the building is displaced during an earthquake are transmitted from the building 10 to the core material 40 via the stud dowels 50 as a compressive load N1.

[0008] Below the web 41 of the core material 40, multiple stud dowels 45 are joined by welding or the like, protruding laterally from the web 41 and embedded inside the soil cement 30. Against the compressive load N1 transmitted to the core material 40, the bearing capacity of the soil cement column-type continuous wall 20 is ensured by the tip bearing capacity, which is determined by the tip area A1 of the tip of the core material 40 and the N value of the ground surrounding the tip, the bearing pressure from each stud dowel 45, and the frictional force between the soil cement 30 and the ground G (or the frictional force between the core material 40 and the soil cement 30).

[0009] However, the surface of the core material 40 is smooth, the frictional force between the core material 40 and the soil cement 30 is small, and as shown in Figure 2, the tip area A1 of the core material 40, which is made of H-shaped steel, is small even when compared to the total area of ​​the soil cement column-type continuous wall 20, and therefore it is difficult to expect a large tip bearing capacity. For these reasons, there is room for improvement in the bearing capacity (support performance) against compressive loads in the soil cement column-type continuous wall 20.

[0010] On the other hand, in a configuration where the soil-cement column-type continuous wall 20 is used as part of the foundation of the permanent structure, when a horizontal force acts on the building 10 during an earthquake, causing the building 10 to displace, and this displacement generates a pull-out force N2 (pull-out load) on the building 10, this pull-out load N2 is also transmitted to the core material 40 via the stud dowels 50. At this time, the rod-shaped stud dowels 45 attached below the core material 40 cannot be expected to provide significant pull-out resistance, and considering that the frictional force between the soil cement 30 and the core material 40 is small as described above, there is a risk that the core material 40 may be pulled out from the soil cement 30.

[0011] Furthermore, as shown in Figure 3, when inserting and erecting the core material 40 in the soil cement 30 of the borehole G1 in the X1 direction, the multiple stud dowels 45 attached below the core material 40 receive a resistive force P from the soil cement 30. Since this resistive force P is relatively large, there are challenges during core material erection, such as difficulty in smoothly inserting the core material 40 into the soil cement 30 and achieving high-precision erection.

[0012] As explained above, while using soil-cement continuous column walls as part of the foundation of a permanent structure can significantly reduce construction costs, conventional soil-cement continuous column walls have room for improvement in terms of resistance to compressive and tensile loads acting from the permanent structure, and also have issues such as poor installation of core materials into the soil-cement. Therefore, there is a need for buildings equipped with soil-cement continuous column walls that have high resistance to both compressive and tensile loads and good core material installation properties into the soil-cement.

[0013] In Patent Document 1, a soil-cement wall is proposed for use as shoring after the completion of the first-floor construction in a construction method using the top-down construction method, and which bears a portion of the weight of the main structure. In this soil-cement wall, the surface of the core material embedded in the soil-cement is provided with irregularities or stud dowels, thereby providing a means for adhesion between the core material and the soil-cement. [Prior art documents] [Patent Documents]

[0014] [Patent Document 1] Japanese Patent Application Publication No. 11-303062 [Overview of the project] [Problems that the invention aims to solve]

[0015] In the soil-cement wall described in Patent Document 1, as explained with reference to Figures 1 and 2 above, since the stud dowels are merely attached to the core material, it is difficult to say that it has sufficient resistance to compressive and tensile loads acting from the permanent structure. Furthermore, in the soil-cement wall described in Patent Document 1, as shown in Figure 3, the stud dowels have a similar problem of reducing the ease with which the core material can be installed into the soil-cement.

[0016] The present invention has been made in view of the above problems, and relates to a building in which at least the side walls of the building and a continuous soil-cement column wall constructed around the building are joined, and aims to provide a building equipped with a continuous soil-cement column wall that has high resistance to both compressive and tensile loads acting from the building and has good embedmentability of core material into the soil-cement, and a method for constructing the same. [Means for solving the problem]

[0017] To achieve the aforementioned objective, one aspect of the building according to the present invention is: A building in which at least the side walls of the underground portion of the building located within the ground are joined to a continuous soil-cement column wall provided around the building, and the continuous soil-cement column wall has a core material embedded inside the soil cement, The core material is characterized in that an inclined plate, which is tilted upward toward the side, is joined to at least the lower part of the core material.

[0018] According to this embodiment, an inclined plate that slopes upward toward the side is attached to at least below the core material constituting a soil-cement column-type continuous wall, which is located in the ground and joined to at least the side wall of the underground part of the building. This allows an increase in tip bearing capacity equivalent to the area of ​​the lower surface of the inclined plate (for example, the projected area on the horizontal plane) to be added to the tip bearing capacity of the core material, thereby increasing the tip bearing capacity of the core material and resulting in a soil-cement column-type continuous wall with high support performance against compressive loads acting from the building. Furthermore, since the inclined plate is attached above the tip of the core material, strictly speaking, the total tip bearing capacity in the region below the core material (the sum of the bearing capacity due to the tip area of ​​the core material and the bearing capacity due to the lower surface (horizontal projected area) of the inclined plate) is increased. In addition, when an uplift load is applied to the core material by the inclined plate that slopes upward toward the side, the upper surface of the inclined plate receives resistance from the soil cement above, thereby improving the uplift resistance of the inclined plate and improving the core material's resistance to uplift loads. Furthermore, because the inclined plates are joined together, when inserting the core material into the soil cement and erecting it, the soil cement can flow laterally along the inclined plates, resulting in improved ease of erecting the core material.

[0019] Here, "at least the side walls of the building" includes not only the side walls of the building (underground section), but also both the side walls and the base slab. Furthermore, "inclined plate" includes not only flat plates such as steel plates that are inclined, but also curved plates that are convex downwards.

[0020] Furthermore, other embodiments of the building according to the present invention are: A building in which at least the side walls of the underground portion of the building located within the ground are joined to a continuous soil-cement column wall provided around the building, and the continuous soil-cement column wall has a core material embedded inside the soil cement, The core material is characterized in that at least the lower side surface is joined to an inclined plate that is V-shaped in front view and opens upward.

[0021] According to this aspect, on at least the lower side surface of the core material constituting the soil-cement column continuous wall that is in the ground and joined to at least the side walls of the underground part of the building, a front-view V-shaped inclined plate that opens upward is joined. As a result, an increase in the tip support force corresponding to the area of the lower surface of the inclined plate (for example, the projected area on the horizontal plane) can be added to the tip support force of the core material. By increasing the tip support force of the core material, a soil-cement column continuous wall with high support performance against the pushing load acting from the building is obtained. Further, due to the front-view V-shaped inclined plate, when a pulling load acts on the core material, the upper surface of the inclined plate that protrudes to the side of the core material receives resistance from the upper soil-cement, thereby improving the pulling resistance of the inclined plate and the endurance of the core material against the pulling load. Furthermore, due to the joining of the front-view V-shaped inclined plate, when inserting and building the core material into the soil-cement, the soil-cement can be made to flow laterally along the inclined plate, so the buildability of the core material is improved.

[0022] Here, the "front-view V-shaped inclined plate" includes a front-view U-shaped inclined plate. <000直线型的倾斜板也包括在“正视图V字形倾斜板”中。

[0023] Also, in another aspect of the building according to the present invention, the core material is formed of H-shaped steel, and the inclined plate is arranged on either one or both of the wide surfaces of the web and flange of the H-shaped steel.

[0024] According to this aspect, by arranging the inclined plate on either one or both of the web and flange of the core material formed of H-shaped steel, the tip area (tip support force) and the pulling resistance of the core material can be increased as desired. Here, a plurality of inclined plates may be provided at the same positions on both wide surfaces of the web of the core material, or may be provided in a staggered pattern at different positions.

[0025] Also, in another aspect of the building according to the present invention, The stud dowels are joined to the core material, and the stud dowels are embedded in the side wall of the underground section, thereby joining the side wall and the soil-cement columnar continuous wall.

[0026] According to this embodiment, the stud dowels provided above the core material are embedded in the side wall of the underground section, and the side wall and the soil-cement column-type continuous wall are joined, thereby effectively transmitting the compressive and tensile loads acting from the building to the core material via the stud dowels, and enabling the soil-cement column-type continuous wall including the core material to bear both the compressive and tensile loads.

[0027] Furthermore, one aspect of the construction method for buildings according to the present invention is: A construction method for a building, wherein at least the side walls of the underground portion of the building located within the ground are joined to a continuous soil-cement column wall provided around the building, Step A involves constructing a continuous soil-cement column wall by installing a core material, formed from an H-shaped steel beam comprising a first flange on the building side, a second flange on the opposite side of the building, and a web, into the soil-cement inside the borehole. Step B involves cutting the soil cement at the upper end of the soil cement column-type continuous wall to expose a portion of the first flange, and joining a stud dowel to the exposed portion of the first flange. The process includes step C, in which at least the side wall of the building that abuts against the first flange is constructed, and the stud dowels are embedded in the side wall, thereby joining the side wall of the underground section and the soil-cement columnar continuous wall together. In step A, a sloping plate that is inclined upward toward the side is joined to at least the lower part of the core material.

[0028] According to this embodiment, an inclined plate that slopes upward toward the side is attached to at least below the core material constituting a soil-cement column-type continuous wall, which is located in the ground and joined to at least the side wall of the underground part of the building. As a result, when inserting the core material into the soil cement and erecting it, the soil cement can be allowed to flow laterally along the inclined plate, thus improving the ease of erecting the core material.

[0029] Furthermore, other embodiments of the construction method for buildings according to the present invention are: A construction method for a building, wherein at least the side walls of the underground portion of the building located within the ground are joined to a continuous soil-cement column wall provided around the building, Step A involves constructing a continuous soil-cement column wall by installing a core material, formed from an H-shaped steel beam comprising a first flange on the building side, a second flange on the opposite side of the building, and a web, into the soil-cement inside the borehole. Step B involves cutting the soil cement at the upper end of the soil cement column-type continuous wall to expose a portion of the first flange, and joining a stud dowel to the exposed portion of the first flange. The process includes step C, in which at least the side wall of the building that abuts against the first flange is constructed, and the stud dowels are embedded in the side wall, thereby joining the side wall of the underground section and the soil-cement columnar continuous wall together. In step A, a V-shaped inclined plate, which opens upward when viewed from the front, is joined to at least the lower side surface of the core material.

[0030] According to this embodiment, a V-shaped inclined plate, which opens upward when viewed from the front, is attached to at least the lower side surface of the core material constituting a soil-cement column-type continuous wall that is located in the ground and joined to at least the side wall of the underground part of the building. As a result, when inserting the core material into the soil cement and erecting it, the soil cement can be allowed to flow laterally along the inclined plate, thus improving the ease of erecting the core material. [Effects of the Invention]

[0031] As can be understood from the above explanation, the present invention provides a building and its construction method in which at least the side walls of the building and a continuous soil-cement column wall constructed around the building are joined, and which has high resistance to both compressive and tensile loads acting from the building, and which has good embedmentability of the core material into the soil-cement. [Brief explanation of the drawing]

[0032] [Figure 1] This is a longitudinal cross-sectional view showing an example of a conventional building. [Figure 2] This is a view along the line II-II in Figure 1. [Figure 3] This diagram shows a conventional building construction method in which a core material is embedded in soil cement. [Figure 4] This is a longitudinal cross-sectional view showing an example of a building according to the embodiment, and a diagram illustrating step C of an example of a construction method for the building according to the embodiment. [Figure 5] This is a perspective view showing the lower region of an example of a core material, illustrating the effect of the inclined plate on the soil cement flowing laterally when inserting the core material into the soil cement, and the pull-out resistance force exerted by the inclined plate when a pull-out resistance force is applied to the core material. [Figure 6] This is a perspective view showing the lower region of another example of a core material, illustrating the effect of the inclined plate on the soil cement flowing laterally when inserting the core material into the soil cement, and the pull-out resistance force exerted by the inclined plate when a pull-out resistance force is applied to the core material. [Figure 7] This diagram illustrates step A of an example of a construction method for a building according to this embodiment. [Figure 8] This diagram illustrates step B of an example of a construction method for a building according to the embodiment. [Modes for carrying out the invention]

[0033] The building and its construction method according to the embodiment will be described below with reference to the attached drawings. In this specification and the drawings, substantially identical components may be denoted by the same reference numerals to avoid redundant explanations.

[0034] [Buildings according to the embodiment] First, an example of a building according to the embodiment will be described with reference to Figures 4 to 6. Here, Figure 4 is a longitudinal cross-sectional view showing an example of a building according to the embodiment, and Figures 5 and 6 are perspective views showing the lower region of an example of a core material, illustrating the effect of the inclined plate on flowing the soil cement laterally when inserting the core material into the soil cement, and the pull-out resistance force exerted by the inclined plate when a pull-out resistance force is applied to the core material. Figure 4 also illustrates step C of an example of the construction method for the building according to the embodiment, and will be referred to in the construction method described in detail below.

[0035] The illustrated building 200 is constructed by joining the side walls 15 and base 17 of the underground section 11 of the building 10 located in the ground G with the soil-cement columnar continuous wall 20 constructed around the building 10. For example, around the side walls 15 of the underground section 11 of the building 10, which is rectangular in plan view, a soil-cement columnar continuous wall 20 in the shape of a rectangular frame in plan view is constructed, and the two are joined at multiple locations. The plan view shape of the building 10 varies, and the soil-cement columnar continuous wall 20 is constructed in a frame shape corresponding to the plan view shape of the building 10.

[0036] Building 10 may be made of RC (Reinforced Concrete), S (Steel), SRC (Steel Reinforced Concrete), or a hybrid of these structures. Building 10 can take many forms, including office buildings, apartment buildings, gymnasiums, shopping malls, and various public buildings. In the illustrated examples below, the building will be described as having at least the side walls 15 and base 17 of the underground section 11 made of RC.

[0037] On the other hand, the soil-cement column-type continuous wall 20 is constructed such that parts of the circular soil-cement 30 overlap each other in plan view, and a core material 40 formed of H-shaped steel is embedded inside the soil-cement 30 within the circular borehole G1 in plan view. Here, in addition to H-shaped steel, steel sheet piles or precast concrete products may also be used as the core material.

[0038] Soil cement 30 is prepared by mixing and stirring soil generated by excavating the ground G with cement grout discharged from the tip of a multi-screw mixing auger machine or the like (not shown), and is constructed by inserting a core material 40 into the soil cement before it hardens.

[0039] The soil-cement column-type continuous wall 20 shown in the illustration serves as a retaining wall during the construction of the building 10, and after the building 10 is constructed, it is joined to the underground section 11 of the building 10, thereby functioning as the foundation of the building 10.

[0040] Of the core material 40 embedded in the soil cement 30, multiple stud dowels 50 are welded to the first flange 42 on the building 10 side above, causing them to protrude laterally. The protruding stud dowels 50 are embedded in the side wall 15 and base 17 of the underground section 11, thereby integrating the building 10 with the soil cement column-type continuous wall 20.

[0041] In a soil-cement column-type continuous wall 20, two wide surfaces 41a of the web 41 of the core material 40 embedded in the soil-cement 30 are each welded to inclined plates 60 that are tilted upward toward the side. The inclined plates 60 are formed from, for example, steel plates.

[0042] Here, the illustrated example shows two inclined plates 60 arranged in a staggered pattern above each of the two wide surfaces 41a (arranged at different positions). However, the inclined plates may be arranged at the same position on both sides, or one or more inclined plates 60 may be arranged on each wide surface 41a. Furthermore, the illustrated example shows the inclined plates 60 joined to the wide surface 41a of the web 41. However, the inclined plates may be joined to the wide surfaces 42 and 43 of the flanges 42 and 43, or the inclined plates may be joined to both the web 41 and the flanges 42 and 43.

[0043] Furthermore, although the inclined plate 60 in the illustrated example is a flat inclined plate, it may also be a curved plate that is convex downwards, for example, made by bending a steel plate.

[0044] Because the inclined plate 60, which is tilted upward toward the side, is welded to the web 41 of the core material 40, as shown in Figure 5, when the core material 40 is inserted downward in the X1 direction into the soil cement, the soil cement flows laterally in the X2 direction along the lower surface 62 of the inclined plate 60, making the insertion of the core material 40 into the soil cement smoother and improving the ease of installation. The improved ease of installation of the core material 40 improves the installation accuracy regarding the verticality and planar position of the core material 40.

[0045] Furthermore, when the lower surfaces 62 of the two inclined plates 60 on the left and right sides of the web 41 are projected downward in the Z direction, twice the projected area A2 is added to the tip area A1 of the H-shaped steel (see Figure 2). As a result, the tip area of ​​the core material 40 increases, and in calculating the tip bearing capacity of the core material 40, the tip bearing capacity is calculated using the tip area of ​​the core material 40: A1 + 2 × A2 and the uniaxial compressive strength of the surrounding soil cement 30. Therefore, the tip bearing capacity of the core material 40 can be significantly increased compared to, for example, the tip area A1 of the core material 40 shown in Figure 2.

[0046] This makes it possible to increase the load-bearing capacity of the soil-cement columnar continuous wall 20, which includes the core material 40, against the compressive load N1 transmitted from the building 10 to the core material 40 via the stud dowel 50.

[0047] Furthermore, as shown in Figure 5, the inclined plate 60, which is tilted upward and laterally relative to the web 41 of the core material 40, receives a pull-out resistance force R from the soil cement above against the upper surface 61 of the inclined plate 60 in response to the pull-out load N2 transmitted from the building 10 to the core material 40 via the stud dowel 50. Therefore, the load-bearing capacity of the soil cement column-type continuous wall 20, including the core material 40, can be increased against the acting pull-out load N2.

[0048] On the other hand, the inclined plate 60A shown in Figure 6 differs from the inclined plate 60 shown in Figure 5 in that it is an inclined plate with a V-shape when viewed from the front, opening upwards.

[0049] Even in the V-shaped inclined plate 60A viewed from the front, when the core material 40 is inserted downward in the X1 direction into the soil cement, the soil cement flows laterally in the X3 direction along the lower surface 64 of the inclined plate 60A, making the insertion of the core material 40 into the soil cement smoother and improving the ease of installation. Improved ease of installation of the core material 40 leads to improved installation accuracy regarding the verticality and planar position of the core material 40 relative to the soil cement.

[0050] Furthermore, when the lower surfaces 64 of the two inclined plates 60A on the left and right sides of the web 41 are projected downward, an area twice the projected area A2 is added to the tip area A1 of the H-shaped steel (see Figure 2). As a result, the tip area of ​​the core material 40 increases, and in calculating the tip bearing capacity of the core material 40, the tip bearing capacity is calculated using the tip area of ​​the core material 40: A1 + 2 × A2 and the uniaxial compressive strength of the surrounding soil cement 30. Therefore, the tip bearing capacity of the core material 40 can be significantly increased compared to, for example, the tip area A1 of the core material 40 shown in Figure 2.

[0051] Furthermore, as shown in Figure 6, the inclined plate 60A, which is V-shaped in front view and opens upward from the web 41 of the core material 40, protrudes outwards. As a result, the upper surface 63 of the inclined plate 60A receives a pull-out resistance force R from the soil cement above against the pull-out load N2 transmitted from the building 10 to the core material 40 via the stud dowel 50. Therefore, it is possible to increase the load-bearing capacity of the soil cement column-type continuous wall 20, including the core material 40, against the acting pull-out load N2.

[0052] Here, the inclined plate 60A in the illustrated example is an inclined plate with a V-shape in front view that opens upwards, but for example, it may also be an inclined plate with a U-shape in front view that opens upwards.

[0053] [Construction method for a building according to this embodiment] Next, an example of a construction method for a building according to the embodiment will be described with reference to Figures 7 and 8 and Figure 4. Here, Figures 7 and 8 are diagrams illustrating steps A and B of the example of a construction method for a building according to the embodiment, respectively. As previously mentioned, Figure 4 is a vertical cross-sectional view showing an example of a building according to the embodiment, and is also a diagram illustrating step C of the example of a construction method for a building according to the embodiment. Note that the following description is a construction method for a building when the core material 40 equipped with the inclined plate 60 shown in Figure 5 is applied, but it may also be a construction method when the core material 40 equipped with the inclined plate 60A shown in Figure 6 is applied.

[0054] In the construction method of the building, first, as shown in Figure 7, prior to the construction of the building, a retaining wall is constructed around the building construction area, for example, a continuous soil-cement column wall 20 in the shape of a rectangular frame in plan view.

[0055] The construction method for the soil-cement column-type continuous wall 20 can be the known SMW (Soil Mixing Wall) method, and begins with the removal of underground obstacles, followed by the installation of a guide wall (not shown), the mixing of soil-cement, and the drilling and mixing of the cement slurry of the design mix while discharging it from the tip of the auger head of a multi-screw mixing auger machine, etc. After reaching a predetermined depth, the auger head is withdrawn while repeatedly mixing is performed, thereby creating soil-cement 30 in the drilled hole G1.

[0056] Then, before the soil cement 30 hardens, the core material 40 is inserted into the soil cement 30 in the X1 direction and erected. In addition, as a wall construction procedure, a continuous method can be applied in which the first element is constructed, then the second element is constructed at an interval, and then the holes at both ends of the third element are constructed overlapping with the holes at one end of both the first and second elements. Alternatively, a pre-drilling combined method can be applied in which multiple holes are pre-drilled at intervals in positions that the holes of each element will follow, and then each element is constructed so that the holes of each element overlap with the pre-drilled holes.

[0057] When erecting the core material 40, the inclined plate 60 is welded to the lower part of the core material 40.

[0058] As described above, the provision of multiple inclined plates 60 below the core material 40 enables smooth insertion of the core material 40 into the soil cement 30, and improves the ease of installation of the core material 40 into the soil cement 30, thereby improving installation accuracy (Above, Step A).

[0059] Next, as shown in Figure 8, the upper region 30a on the building side of the soil-cement column-type continuous wall 20 is cut away to expose a portion of the first flange 42.

[0060] Next, multiple stud dowels 50 are welded to the exposed first flange 42 (this completes step B).

[0061] Next, as shown in Figure 4, the side walls 15 and base 17 of the underground section 11 of the building 10 that are in contact with at least the first flange 42 are constructed, and multiple stud dowels 50 are embedded in the side walls 15 and base 17, thereby joining the side walls 15 and base 17 of the underground section 11 to the soil-cement column-type continuous wall 20.

[0062] Subsequently, by constructing the entire building 10, a building 200 is constructed in which the building 10 and the soil-cement column-type continuous wall 20 are interconnected (this completes process C).

[0063] According to the illustrated construction method, in step A, when installing the core material 40 into the soil cement 30 in the borehole G1, installing the core material 40 with an inclined plate 60 installed below it improves the ease with which the core material 40 can be installed into the soil cement 30. Furthermore, because an inclined plate 60 that slopes upward toward the side is provided below the core material 40, it is possible to construct a soil cement column-type continuous wall 20 with high resistance to both compressive load N1 and tensile load N2 acting from the building, and a building 200 that integrates this soil cement column-type continuous wall 20 together with the building 10.

[0064] Other embodiments may be used in which other components are combined with the configurations listed in the above embodiments, and the present invention is not limited in any way to the configurations shown herein. In this regard, modifications can be made without departing from the spirit of the present invention, and can be appropriately determined according to the application form. [Explanation of Symbols]

[0065] 10: Buildings 11: Underground 15: Side wall 16: Pillar 17: Bottom board 20: Soil-cement column-type continuous wall 30: Soil cement 30a: Upper area 40: Core material (H-beam) 41: Web 41a: Wide surface 42: First flange 43: Second flange 50: Stud dowel 60, 60A: Inclined plate 61,63:Top surface 62,64:Bottom surface 200: Buildings G: Ground G1: Drilling N1: Indentation load N2: Pull-out load R: Pull-out resistance A2: Projection area of ​​the inclined plate

Claims

1. A building in which at least the side walls of the underground portion of the building located within the ground are joined to a continuous soil-cement column wall provided around the building, and the continuous soil-cement column wall has a core material embedded inside the soil cement, A building characterized in that at least the lower side surface of the core material is joined to an inclined plate that is V-shaped in front view and opens upward.

2. The core material is formed from H-shaped steel, The building according to claim 1, characterized in that the inclined plate is arranged on the wide surface of either the web or the flange of the H-shaped steel, or both.

3. The building according to claim 1 or 2, characterized in that a stud dowel is joined to the core material and the stud dowel is embedded in the side wall of the underground section, thereby joining the side wall and the soil-cement columnar continuous wall.

4. A construction method for a building, wherein at least the side walls of the underground portion of the building located within the ground are joined to a continuous soil-cement column wall provided around the building, Step A involves constructing a continuous soil-cement column wall by installing a core material, formed from an H-shaped steel beam comprising a first flange on the building side, a second flange on the opposite side of the building, and a web, into the soil-cement inside the borehole. Step B involves cutting the soil cement at the upper end of the soil cement column-type continuous wall to expose a portion of the first flange, and joining a stud dowel to the exposed portion of the first flange. The process includes step C, in which at least the side wall of the building that abuts against the first flange is constructed, and the stud dowels are embedded in the side wall, thereby joining the side wall of the underground section and the soil-cement columnar continuous wall together. A method for constructing a building, characterized in that, in step A, at least the lower side surface of the core material is joined to a V-shaped inclined plate in front view that opens upward.

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