Overwater double-limb areca-nut type power transmission tower steel structure

Abstract

The utility model discloses an overwater double-limb areca-nut type power transmission tower steel structure which comprises two single-limb towers which are symmetrically arranged, each single-limb tower comprises an iron tower head section, an iron tower middle section and a tower top intersection section from bottom to top, the section of the iron tower head section of each single-limb tower is an inequilateral hexagon, and the section of the iron tower middle section of each single-limb tower is an inequilateral hexagon. The middle section of the iron tower of each single-limb tower is a non-equilateral quadrangle, the tower top intersection section is a triangular intersection section, and the tower top intersection sections of the two single-limb towers are intersected and closed to form a closed section; and the multiple layers of cross arms are arranged at different heights of the two single-limb towers in the vertical direction, each layer of cross arms comprises two cross arms, and the two cross arms are symmetrically arranged on the outer sides of the two single-limb towers correspondingly. The utility model further discloses an installation method of the overwater double-limb areca-nut type power transmission tower steel structure. The overwater double-limb areca-nut-shaped power transmission tower mounting device effectively achieves the purpose of quickly and accurately mounting an overwater double-limb areca-nut-shaped power transmission tower, the construction speed is increased, the construction quality is improved, the technical economic cost performance is high, and the effect is remarkable.

Description

Technical Field

[0001] The utility model belongs to the technical field of power transmission tower structures and relates to an above-water double-limb betel nut-shaped power transmission tower steel structure. Background Art

[0002] As a common form of transmission line structure at home and abroad, water-based steel structure towers, especially power steel pipe poles and power angle steel towers, are widely used. However, considering the landscape requirements, it is rare to design the transmission tower as a double-limb betel nut type. At the same time, how to quickly and accurately install the double-limb betel nut type transmission tower is an urgent problem that needs to be solved. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described below.

[0004] The utility model aims to provide an above-water double-limb betel nut-shaped transmission tower steel structure.

[0005] Another object of the utility model is to provide a method for installing an above-water double-limb betel nut-shaped transmission tower steel.

[0006] In order to solve the deficiencies in the background technology, the deficiencies of the conventional underwater power transmission tower structure are analyzed, and aesthetic requirements are incorporated to obtain a new underwater double-limbed betel nut-shaped transmission tower steel structure and installation method.

[0007] To this end, the technical solution provided by the utility model is:

[0008] An above-water double-limb betel nut-shaped transmission tower steel structure, comprising:

[0009] Two single-limb towers, the two single-limb towers are symmetrically arranged, each single-limb tower comprises, from bottom to top, a first section of an iron tower, a middle section of an iron tower and a tower top intersection section, wherein the cross section of the first section of the iron tower of each single-limb tower is an unequal-sided hexagon, the middle section of the iron tower of each single-limb tower is an unequal-sided quadrilateral, the tower top intersection section is a triangular intersection section, and the tower top intersection sections of the two single-limb towers are joined together to form a joint section;

[0010] A plurality of layers of cross arms, each layer of cross arms comprises two cross arms, the two cross arms are symmetrically arranged on the outsides of the two single-limb towers, and a plurality of layers of cross arms are arranged at different heights of the two single-limb towers along the vertical direction, and the cross section of the cross arms is a box section.

[0011] Preferably, in the above-water double-limb betel nut-shaped transmission tower steel structure, the tower body segments of each of the above-mentioned single-limb towers are connected by internal bolts, anchor plates are arranged on the outer circles of two adjacent tower body segments, the two anchor plates are fixed by first bolts, and flanges are arranged on the inner circles of two adjacent tower body segments, the two flanges are fixed by second bolts, wherein the length of the first bolt is longer than that of the second bolt.

[0012] Preferably, in the above-water double-limb betel nut-shaped transmission tower steel structure, a plurality of longitudinal stiffening ribs are arranged at intervals along the horizontal direction on the first section of the tower and the middle section of the tower, and shear nails are arranged on the inner side of the side wall of the first section of the tower, and transverse stiffening ribs are arranged at intervals along the height direction on the middle section of the tower.

[0013] Preferably, in the above-water double-limb betel nut-shaped transmission tower steel structure, the bottom of the first section of the tower is a steel-concrete combined section, the rest are steel structure sections, and the middle section of the tower is a steel structure section.

[0014] Preferably, in the above-water double-limb betel nut-shaped transmission tower steel structure, the plurality of layers of cross arms are four layers, including eight cross arms, and each cross arm is 6-10m in length.

[0015] Preferably, in the above-water double-limb betel nut-shaped transmission tower steel structure, the several layers of cross arms are located in the upper section of the single-limb tower.

[0016] Preferably, in the above-water double-limb betel nut-shaped transmission tower steel structure, the height of the first section of the tower is 5-10 meters, the height of the steel-concrete combined section is 2 meters, and the height of each section of the middle section of the tower is 7-15 meters.

[0017] The installation method of the above-water double-limb betel nut-shaped transmission tower steel structure comprises the following steps:

[0018] Install positioning steel on the top surface of the pedestal, use a crane ship to install the first section of the tower, and after the first section of the tower is installed, tie the steel bars and pour the concrete for the steel-concrete part, and then install the next tower section;

[0019] A guide device is arranged on the top of the first segment, and a crane ship is used to install the first segment of the middle segment of the iron tower. After the first segment is installed, a temporary wind damper is arranged on its top surface. Before the next segment is installed, the temporary wind damper is removed. After the next segment is installed, a new temporary wind damper is installed on the top surface of the current segment, and the above steps are repeated until the middle segment of the iron tower is installed.

[0020] Install the tower top intersection section to obtain two single-limb towers, and join the tower top intersection sections of the two single-limb towers to form a joint section to complete the installation.

[0021] Preferably, the installation method further comprises the following steps during the installation process:

[0022] During the installation of the lower tower limb of the transmission tower, a first layer of temporary cross braces is arranged, and the first layer of temporary cross braces includes: two first hoops respectively installed outside the two single-limb towers, a first horizontal cross brace with two ends respectively connected to the two first hoops and arranged in a horizontal direction, and two reinforcement supports respectively fixed on both sides of the two hoops in a horizontal direction, wherein one end of the first horizontal cross brace is connected to one of the hoops, and the other end of the first horizontal cross brace is connected to the other hoop through a horizontally arranged first jack and a wedge-shaped pad connected to the first jack.

[0023] Preferably, the installation method further comprises the following steps during the installation process:

[0024] During the installation of the upper limb of the transmission tower, a second temporary horizontal brace is arranged, and the second temporary horizontal brace is divided into two layers, including the first layer of the second temporary horizontal brace installed first, the first layer of the second horizontal horizontal brace arranged between the two single-limb towers, one end of the second horizontal horizontal brace is connected to one of the single-limb towers, and the other end of the second horizontal horizontal brace is connected to the other single-limb tower through a horizontally arranged second jack and a wedge-shaped pad connected to the second jack;

[0025] Then the second layer is installed on the first layer, and the second layer includes: two second hoops respectively installed outside the two single-limb towers, two third horizontal cross braces on one side connected to one of the second hoops at one end and arranged in the horizontal direction, and the remaining third horizontal cross brace on the other side connected to the other second hoop at one end and arranged in the horizontal direction, wherein both sides of the remaining third horizontal cross brace on the other side are respectively connected to the two third horizontal cross braces on one side through a second jack.

[0026] Preferably, the installation method further comprises: removing the second layer of temporary cross braces and the first layer of temporary cross braces in sequence.

[0027] Preferably, in the installation method, the weight of the temporary wind damper is 0.5-2 tons.

[0028] The utility model at least has the following beneficial effects:

[0029] The utility model provides an above-water double-limb betel nut-shaped transmission tower steel structure and an installation method which are simple, reliable and easy to operate, and effectively solves the problem of how to quickly and accurately install the double-limb betel nut-shaped transmission tower considering landscape requirements, accelerates the construction speed, improves the construction quality, has high technical and economic cost performance, and has remarkable effects.

[0030] Safety: This method has clear force. The safety of the overall structure is ensured by reasonably dividing the double-limbed betel nut-shaped iron tower into sections and determining the positions of the temporary cross braces on the first and second floors. The connection between sections is bolted with internal bolts, which ensures the smooth surface of the iron tower and improves its ornamental value. The entire solution improves the safety of installation and the technical and economic cost-effectiveness.

[0031] Economic: This method is simple to operate, convenient to construct, meets quality and safety requirements, and can greatly save construction costs. By setting up temporary wind damping, it effectively reduces the impact of wind vibration on the structure during construction, while reducing the difficulty of designing the original tower structure. It has high technical and economic cost performance.

[0032] Wide scope of application: It can be used in the design and construction of water landscape-shaped transmission towers, with strong adaptability and a wide range.

[0033] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an elevation view of an above-water double-limb betel nut-shaped transmission tower steel structure in one of the schemes of the utility model.

[0035] Figure 2 This is an elevation view of the first-layer temporary cross brace in one of the solutions of the utility model.

[0036] Figure 3 This is a plan view of the first-layer temporary cross brace in one of the solutions of the utility model.

[0037] Figure 4 This is an elevation view of the second-layer temporary cross brace in one of the solutions of the utility model.

[0038] Figure 5 for Figure 4 1-1 cross-sectional view.

[0039] Figure 6 for Figure 4 2-2 cross-sectional view.

[0040] Figure 7 This is an elevation view of the connection node between transmission tower segments in one of the solutions of the utility model.

[0041] Figure 8 This is a plan view of a single-limb tower segment connection node in one of the schemes of the utility model.

[0042] Fig. 9 This is a temporary wind damper elevation diagram in one of the solutions of the utility model.

[0043] Description of reference numerals:

[0044] 1- double-limb betel nut-shaped iron tower, 2- first-layer temporary cross brace, 3- second-layer temporary cross brace, 4- iron tower lower limb segment, 5- iron tower upper limb segment, 6-temporary wind damper, 7- steel-concrete combined section, 8- joint section, 9- first cushion beam, 10- first wedge block, 11- first cross beam, 12- first horizontal cross brace, 13- first corbel, 14- reinforced support, 15- second cushion beam, 16- second wedge block, 17- second horizontal cross brace, 18- the third horizontal cross brace on the other side, 19- second corbel, 20- the third horizontal cross brace on one side, 21- second cross beam, 22- first bolt, 23- anchor plate, 24- second bolt, 25- flange, 26- temporary bolt, 27- steel beam, 28- water tank. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0046] It should be understood that terms such as “having”, “including” and “comprising” used herein do not specify the existence or addition of one or more other elements or combinations thereof.

[0047] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense. For example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0048] like Figure 1 , Figure 2 , Figure 3 As shown, the utility model provides an above-water double-limb betel nut-shaped transmission tower steel structure, comprising:

[0049] Two single-limb towers 1, the two single-limb towers are symmetrically arranged, each single-limb tower comprises a first section of an iron tower, a middle section of an iron tower and a tower top intersection section from bottom to top, wherein the cross section of the first section of the iron tower of each single-limb tower is an unequal-sided hexagon, the middle section of the iron tower of each single-limb tower is an unequal-sided quadrilateral, the tower top intersection section is a triangular intersection section, and the tower top intersection sections of the two single-limb towers are joined together to form a joint section;

[0050] A plurality of layers of cross arms, each layer of cross arms comprises two cross arms, the two cross arms are symmetrically arranged on the outsides of the two single-limb towers, and a plurality of layers of cross arms are arranged at different heights of the two single-limb towers along the vertical direction, and the cross section of the cross arms is a box section.

[0051] In one of the schemes of the utility model, as a preference, each of the tower body segments of the single-limb tower is connected by internal bolts, an anchor plate 23 is arranged on the outer ring of two adjacent tower body segments, the two anchor plates 23 are fixed by first bolts 22, a flange 25 is arranged on the inner ring of each adjacent tower body segment, the two flanges 25 are fixed by second bolts 24, wherein the length of the first bolt 22 is longer than that of the second bolt 24, the first bolt is a long high-strength bolt, and the second bolt is a short high-strength bolt.

[0052] In one of the schemes of the present invention, preferably, a plurality of longitudinal stiffening ribs are arranged at intervals along the horizontal direction on the first section of the iron tower and the middle section of the iron tower, and shear nails are arranged on the inner side of the side wall of the first section of the iron tower, and transverse stiffening ribs are arranged at intervals along the height direction on the middle section of the iron tower.

[0053] In one of the schemes of the utility model, preferably, the bottom of the first section of the iron tower is a steel-concrete combined section 7, the rest is a steel structure section, and the middle section of the iron tower is a steel structure section.

[0054] In one of the schemes of the present invention, preferably, the plurality of layers of cross arms are four layers, including eight cross arms, and the length of each cross arm is 6-10m.

[0055] In one of the solutions of the present utility model, preferably, the plurality of layers of cross arms are located in the upper section of the single-limb tower.

[0056] In one of the schemes of the utility model, preferably, the height of the first section of the iron tower is 5-10 meters, the height of the steel-concrete combined section 7 is 2 meters, and the height of each section of the middle section of the iron tower is 7-15 meters.

[0057] The utility model also provides a method for installing an above-water double-limb betel nut-shaped transmission tower steel structure, comprising the following steps:

[0058] Install positioning steel on the top surface of the pedestal, use a crane ship to install the first section of the tower, and after the first section of the tower is installed, tie the steel bars and pour the concrete for the steel-concrete part, and then install the next tower section;

[0059] A guide device is arranged on the top of the first segment, and a crane ship is used to install the first segment of the middle segment of the iron tower. After the first segment is installed, a temporary wind damper 6 is arranged on its top surface. Before the next segment is installed, the temporary wind damper 6 is removed. After the next segment is installed, a new temporary wind damper 6 is installed on the top surface of the current segment, and the above steps are repeated until the middle segment of the iron tower is installed.

[0060] Install the tower top intersection section to obtain two single-limb towers, and join the tower top intersection sections of the two single-limb towers to form a joint section to complete the installation.

[0061] In the above scheme, as a preferred embodiment, the installation process also includes the following steps:

[0062] During the installation of the lower tower limb of the transmission tower, a first layer of temporary cross braces 2 is arranged, and the first layer of temporary cross braces 2 includes: two first hoops respectively installed outside the two single-limb towers, a first horizontal cross brace 12 whose two ends are respectively connected to the two first hoops and arranged in the horizontal direction, and two reinforcement supports 14 respectively fixed on both sides of the two hoops in the horizontal direction, wherein one end of the first horizontal cross brace 12 is connected to one of the hoops, and the other end of the first horizontal cross brace 12 is connected to the other hoop through a horizontally arranged first jack and a wedge-shaped pad connected to the first jack.

[0063] In the above scheme, as a preferred embodiment, the installation process also includes the following steps:

[0064] During the installation of the upper limb of the transmission tower, a second temporary horizontal brace 3 is arranged. The second temporary horizontal brace 3 is divided into two layers, including a first layer of the second temporary horizontal brace 3 installed first, a second horizontal horizontal brace 17 arranged between two single-limb towers, one end of the second horizontal horizontal brace 17 is connected to one of the single-limb towers, and the other end of the second horizontal horizontal brace 17 is connected to the other single-limb tower through a second horizontally arranged jack and a wedge-shaped pad connected to the second jack;

[0065] Then the second layer is installed on the first layer, and the second layer includes: two second hoops respectively installed outside the two single-limb towers, two third horizontal cross braces 20 on one side connected to one of the second hoops at one end and arranged in the horizontal direction, and the remaining third horizontal cross brace 18 on the other side connected to the other second hoop at one end and arranged in the horizontal direction, wherein both sides of the remaining third horizontal cross brace 18 on the other side are respectively connected to the two third horizontal cross braces on one side through a second jack.

[0066] In the above scheme, as a preference, it further comprises: removing the second layer of temporary cross braces 3 and the first layer of temporary cross braces 2 in sequence.

[0067] In one solution of the present utility model, preferably, the weight of the temporary wind damper 6 is 0.5-2 tons.

[0068] In order to enable those skilled in the art to better understand the technical solution of the utility model, the following embodiments are provided for illustration:

[0069] The utility model discloses a novel underwater double-limb betel nut-shaped transmission tower steel structure and an installation method, wherein the structure mainly consists of a first section of an iron tower, a middle section of an iron tower, a cross arm, and a tower top intersection section.

[0070] The tower's appearance is that the entire tower is divided into left and right limbs, with mirror-symmetrical cross-sections. The cross-section of a single limb changes from an unequal-sided hexagon to an unequal-sided quadrilateral, and they intersect at the top of the tower.

[0071] Two single-limb towers 1 are symmetrically arranged, and each single-limb tower includes a first section of an iron tower, a middle section of an iron tower and a tower top intersection section from bottom to top, wherein the cross section of the first section of the iron tower of each single-limb tower is an unequal-sided hexagon, the middle section of the iron tower of each single-limb tower is an unequal-sided quadrilateral, the tower top intersection section is a triangular intersection section, and the tower top intersection sections of the two single-limb towers are joined together to form a joint section; the plurality of layers of cross arms are located at the upper section of the single-limb tower.

[0072] The tower body segments of each single-limb tower are connected by internal bolts, and anchor plates 23 are arranged on the outer circles of two adjacent tower body segments, and the two anchor plates 23 are fixed by first bolts 22. Flanges 25 are arranged on the inner circles of two adjacent tower body segments, and the two flanges 25 are fixed by second bolts, wherein the length of the first bolts 22 is longer than that of the second bolts.

[0073] A plurality of longitudinal stiffening ribs are arranged at intervals along the horizontal direction on the first segment of the iron tower and the middle segment of the iron tower, and shear nails are arranged on the inner side of the side wall of the first segment of the iron tower. Transverse stiffening ribs are arranged at intervals along the height direction on the middle segment of the iron tower.

[0074] The first section of the tower: The first section of the tower is 7 meters high (not limited to 7 meters, 5-10 meters are all acceptable), the maximum side length of the single-leg section is about 4 meters, and the section is an unequal-sided hexagon, of which the bottom 2 meters is a steel-concrete combined section 7, and the rest is a steel structure section; the external steel plate wall thickness is 30mm, and a longitudinal stiffening rib is arranged at intervals of 400mm in the horizontal direction. The thickness of the longitudinal stiffening rib is 24mm and the width is 180mm. Shear nails are arranged on the inner side of the side wall, and the spacing between the shear nails is 200mm×200mm; if Figure 7 As shown, the tower body segments are connected by internal bolts, and the connection nodes adopt the "flange 25+anchor plate 23+long and short bolts method", wherein the long bolts, i.e., the first bolts 22, are matched with the anchor plates 23 and arranged in the outer circle to withstand the tension and bending moment between the tower segments, and the short bolts, i.e., the second bolts 24, are matched with the flange 25 and arranged in the inner circle to withstand the shear force between the tower segments;

[0075] The middle section of the tower: Each section of the tower is about 7-15m high. The cross section of the single limb changes from an unequal hexagon to an unequal quadrilateral (from bottom to top), and the maximum side length changes from 4m to 2m. It is a steel structure. The thickness of the external steel plate changes from 30mm to 12mm (from bottom to top). Along the horizontal direction, longitudinal stiffening ribs are arranged. The spacing between stiffening ribs changes from 400mm to 300mm (from bottom to top), and the thickness changes from 22mm to 14mm (from bottom to top). Along the height direction, a transverse stiffening rib is set every 5m or so. Including the top joint section, the whole tower is equipped with 21 sections (10 sections on each of the left and right tower limbs, and another 1 is the top joint section, a total of 21 sections); the tower body sections are connected by internal bolts, and the connection nodes adopt the "flange 25+anchor plate 23+long and short bolts method", in which the long bolts, i.e. the first bolts 22, are paired with the anchor plates 23 and arranged in the outer circle to withstand the tension and bending moment between the tower sections, and the short bolts, i.e. the second bolts 24, are paired with the flanges 25 and arranged in the inner circle to withstand the shear force between the tower sections;

[0076] Crossarm: The entire tower is composed of eight crossarms, divided into four layers and arranged symmetrically; the crossarm length is 6-10m, and the cross section is a box section; the structure is a steel structure, used for hanging wires, of which the top layer is for hanging ground wires, and the three layers below are for hanging conductors;

[0077] Intersection section at the top of the tower: The intersection section at the top of the tower is a triangular intersection section, and the two limbs are gradually merged at the top of the tower from an unequal quadrilateral.

[0078] The construction process is as follows:

[0079] Install the first section of the tower → Carry out reinforced concrete construction of the first steel-concrete section → Install the lower tower section 4 of the tower → Install the first-layer temporary cross brace 2 → Install the upper tower section 5 of the tower → Install the second-layer temporary cross brace 3 → Install the joint section → Remove the temporary cross brace.

[0080] Install the first section of the tower: install positioning steel on the top surface of the pedestal, and use a crane ship to install the first section of the tower so as to accurately position the first section of the tower; after the first section of the tower is installed, tie the steel bars and pour the concrete for the steel-concrete part, and then perform maintenance. After the strength reaches the design requirements, install the next tower section;

[0081] Installation of the lower tower segment 4 of the iron tower: a guide device is set at the top of the first segment, and the lower tower segment 4 of the iron tower is installed by a crane ship; after the segment is installed, a temporary wind damper 6 is set by using the bolt holes in the top surface. The temporary wind damper 6 is set by using a steel beam + a suspended water tank. The weight is determined according to the design, generally 0.5-2t. Its function is to resist the influence of wind vibration during the construction process (before the structure is closed); when installing the next segment, the temporary wind damper 6 needs to be removed in advance, and after the segment is installed, the temporary wind damper 6 is installed on the top surface of the segment;

[0082] Installation of the first-layer temporary cross brace 2: According to the overall structure height and shape, the first-layer temporary cross brace 2 is installed at the appropriate position of the lower tower limb of the iron tower to prevent the two tower limbs from spreading outward and control the horizontal position of the two tower limbs; Figure 2 As shown, the first-layer temporary cross brace 2 is 2HN400*200mm steel (including the first cross beam 11) welded to form a hoop, which is divided into two parts, connected into a whole by bolting, and supported by the first corbel 13 attached to the side wall of the tower from below. Two 300mm*8mm bracing steel pipes are set in the middle to form the first horizontal cross brace 12. One end of the first horizontal cross brace 12 is connected to the hoop by bolts, and the other end is provided with a jack, a first wedge plate 10 and a first cushion beam 9; at the same time, two 32mm diameter first fine-rolled threaded steel bars are set on the outside as reinforcement supports 14, and a through-hole jack is set at the end; both settings are used to adjust the relative plane position of the left and right sides of the tower limb; the entire first-layer temporary cross brace 2 is installed using a crane ship;

[0083] Installation of the upper tower segment of the iron tower: a guide device is set at the top of the installed segment, and the upper tower segment of the iron tower is installed by using a crane ship; after the segment is installed, a temporary wind damper 6 is set using the bolt holes in the top surface (wind damper is a common structure used to slow down or eliminate the vibration and swing of buildings and other structures. Its principle is based on the action of wind force, and a series of mechanisms are used to consume or disperse the energy of wind, thereby reducing the impact on the structure. Wind dampers are usually composed of one or more rotatable discs, balls or boxes, which rotate when affected by wind force to generate friction and inertia. These forces convert the energy of wind into heat energy or mechanical energy, thereby reducing the vibration of the structure). In the utility model, the temporary wind damper 6 is set by a steel beam 27 + a suspended water tank 28, and the temporary steel beam 27 is fixed to the top surface of the segment by temporary bolts 26. The weight is determined according to the design, and the general weight is 0.5-2t. Its function is to resist the influence of wind vibration during the construction process (before the structure is closed); when the next segment is to be installed, the temporary wind damper 6 needs to be removed in advance, and after the segment is installed, the temporary wind damper 6 is installed on the top surface of the segment;

[0084] Installation of the second-layer temporary cross brace 3: The second-layer temporary cross brace 3 is divided into two layers. The first layer is the second horizontal cross brace 17 and the second jack, which mainly provide horizontal force in the left and right directions of the tower limbs; the second layer is 2HN400*200mm steel (including the second cross beam 21) welded to form a hoop, which is divided into two parts and connected into a whole by bolting. It is supported by the second bracket 19 attached to the side wall of the tower below. Three 2HN400*200mm steels are set in the middle of the hoops on the two tower limbs as the third horizontal cross brace 18. The steel and the hoop are welded together as a whole. The second jack 20 is set between the three steels, which can provide force in the front and rear directions to adjust the possible misalignment of the left and right tower limbs in the front and rear directions. The entire second-layer temporary cross brace 3 is installed using a crane ship.

[0085] Installation of the closure section: The closure section is the last section of the tower, which is a triangular closure section. The left and right tower legs of the lower section are bolted and fixed by high-strength bolts. It is planned to adopt the forced closure method. Considering the influence of temperature, the installation of the closure section should be carried out at night.

[0086] Temporary cross brace removal: After the tower is closed, the temporary cross brace needs to be removed, and the coating that may be damaged needs to be repaired and restored. The second-layer temporary cross brace 3 and temporary platform, the first-layer temporary cross brace 2 and platform are removed accordingly.

[0087] The specific implementation sequence is as follows:

[0088] 1. The steel structure of the double-limb betel nut-shaped transmission tower on water is studied and divided into sections; in one embodiment of the utility model, the tower is 100 meters high and is generally divided into sections of 7-15 meters according to the lifting capacity of the crane ship. The weight of a single section is about 30 tons. It can be divided into the lower tower section, the upper tower section and the joint section. The division of the lower tower section and the upper tower section does not conflict with the division of the first section and the middle section of the tower.

[0089] 1. Determine the positions of the first-layer temporary cross brace 2 and the second-layer temporary cross brace 3 of the steel structure of the double-limb betel nut-shaped transmission tower on water;

[0090] 2. Determine the internal bolt connection form and specifications between the lower tower segment 4 and the upper tower segment 5 through calculation;

[0091] 3. Determine the structural form and weight of the temporary wind damper 6 through monitoring calculation;

[0092] 4. Install the first section, pay attention to symmetrical construction during the installation process, and then carry out the steel-concrete combined section construction;

[0093] 5. After the concrete strength meets the design requirements, install the lower tower segment of the second tower. During the installation process, pay attention to symmetrical construction;

[0094] 6. After the lower tower segment of the second tower is installed, install the temporary wind damper;

[0095] 7. Remove the temporary wind damper and install the lower tower segment of the third tower. During the installation process, pay attention to symmetrical construction;

[0096] 8. Repeat steps 7 and 8 for the installation of subsequent segments;

[0097] 9. Install the first layer of temporary cross bracing 2 at the appropriate location;

[0098] 10. The upper tower segment of the iron tower is then installed. During the installation process, attention should be paid to symmetrical construction, and the second-layer temporary cross brace 3 should be installed at the appropriate position;

[0099] 11. Carry out the construction of closure section 8;

[0100] 12. Remove the first-layer temporary cross brace 2 and the second-layer temporary cross brace 3 and repair the outer surface of the steel structure of the underwater double-limb betel nut-shaped transmission tower.

[0101] The number of modules and processing scale described here are used to simplify the description of the utility model. Application, modification and variation of the utility model are obvious to those skilled in the art.

[0102] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An above-water double-limb betel nut-shaped transmission tower steel structure, characterized in that: include: Two single-limb towers, the two single-limb towers are symmetrically arranged, each single-limb tower comprises a first section of an iron tower, a middle section of an iron tower and a tower top intersection section from bottom to top, wherein the cross section of the first section of the iron tower of each single-limb tower is a hexagon, the middle section of the iron tower of each single-limb tower is a quadrilateral, the tower top intersection section is a triangular intersection section, and the tower top intersection sections of the two single-limb towers are joined together to form a joint section; A plurality of layers of cross arms, each layer of cross arms comprises two cross arms, the two cross arms are symmetrically arranged on the outsides of the two single-limb towers, and a plurality of layers of cross arms are arranged at different heights of the two single-limb towers along the vertical direction, and the cross section of the cross arms is a box section.

2. The above-water double-limb betel nut-shaped transmission tower steel structure as claimed in claim 1, characterized in that: The tower body segments of each single-limb tower are connected by internal bolts, and anchor plates are arranged on the outer circles of two adjacent tower body segments, and the two anchor plates are fixed by first bolts. Flanges are arranged on the inner circles of two adjacent tower body segments, and the two flanges are fixed by second bolts, wherein the length of the first bolt is longer than that of the second bolt.

3. The above-water double-limb betel nut-shaped transmission tower steel structure as claimed in claim 1, characterized in that: A plurality of longitudinal stiffening ribs are arranged at intervals along the horizontal direction on the first segment of the iron tower and the middle segment of the iron tower, and shear nails are arranged on the inner side of the side wall of the first segment of the iron tower. Transverse stiffening ribs are arranged at intervals along the height direction on the middle segment of the iron tower.

4. The above-water double-limb betel nut-shaped transmission tower steel structure as claimed in claim 1, characterized in that: The bottom of the first section of the iron tower is a steel-concrete combined section, the rest are steel structure sections, and the middle section of the iron tower is a steel structure section.

5. The above-water double-limb betel nut-shaped transmission tower steel structure as claimed in claim 1, characterized in that: The plurality of layers of cross arms are four layers, including eight cross arms, and each cross arm is 6-10m in length.

6. The above-water double-limb betel nut-shaped transmission tower steel structure as claimed in claim 1, characterized in that: The plurality of layers of cross arms are located at the upper section of the single-limb tower.

7. The above-water double-limb betel nut type transmission tower steel structure as claimed in claim 4, characterized in that: The height of the first section of the iron tower is 5-10 meters, the height of the steel-concrete combined section is 2 meters, and the height of each section of the middle section of the iron tower is 7-15 meters.

Images