阅读说明：本技术 一种钢塔与钢壳混凝土组合塔的混合塔结构 (Mixed tower structure of steel tower and steel shell concrete combined tower ) 是由 梁立农 张旸 刘明慧 宁立 卢绍鸿 曲宛桐 肖杰 唐清东 陈焕煜 孙洋 于 2021-06-29 设计创作，主要内容包括：本发明公开了一种钢塔与钢壳混凝土组合塔的混合塔结构,包括从上至下依次设置的上塔柱、结合段和下塔柱,上塔柱为钢塔,下塔柱为钢壳混凝土组合塔,上塔柱通过结合段过渡至下塔柱。本发明可用于外形较复杂的主塔,外观质量好,塔壁的抗裂性和耐久性好,施工工期短,下塔柱为钢壳混凝土组合塔,可以减小板厚,降低加工难度,节约造价；上塔柱为钢塔,可以解决随着造型尺度的增加而造成结构自重增加的问题,或可适应如斜拉桥主塔上塔柱受力需求减小情况,可以大大减少塔上部的质量,降低控制塔底承载力的地震响应。本发明可以在桥梁的主塔设计上,提供更多的选择,施工工厂化,结构性能更优,造型更为丰富。(The invention discloses a mixed tower structure of a steel tower and a steel shell concrete combined tower, which comprises an upper tower column, a combining section and a lower tower column which are sequentially arranged from top to bottom, wherein the upper tower column is the steel tower, the lower tower column is the steel shell concrete combined tower, and the upper tower column is transited to the lower tower column through the combining section. The invention can be used for the main tower with a complex appearance, has good appearance quality, good crack resistance and durability of the tower wall and short construction period, and the lower tower column is a steel shell concrete combined tower, so that the plate thickness can be reduced, the processing difficulty is reduced, and the manufacturing cost is saved; the upper tower column is a steel tower, so that the problem of structural dead weight increase caused by the increase of modeling scale can be solved, or the upper tower column stress requirement reduction condition of a main tower of a cable-stayed bridge can be adapted, the mass of the upper part of the tower can be greatly reduced, and the seismic response of the bearing capacity of the tower bottom is reduced. The invention can provide more choices on the design of the main tower of the bridge, and has the advantages of industrialized construction, better structural performance and richer modeling.)

1. The utility model provides a mixed tower structure of steel tower and steel shell concrete combination tower which characterized in that: it includes from last king-post, combination section and the king-post that sets gradually down, it is the steel tower to go up the king-post, the king-post is steel-shelled concrete combined tower down, it passes through the combination section transition to king-post down to go up the king-post.

2. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 1, characterized in that: the upper tower column and the lower tower column respectively comprise an inner shell and an outer shell sleeved on the inner shell, the inner shell and the outer shell of the upper tower column and the lower tower column respectively extend up and down to be connected into a whole, and a plurality of vertical ribs are respectively arranged on the inner surfaces of the outer shells of the upper tower column and the lower tower column and on the outer surface of the inner shell along the circumferential direction of the inner shells; the vertical ribs on the outer shell of the steel tower correspond to the vertical ribs on the outer shell of the steel shell concrete combined tower from top to bottom, and the vertical ribs on the inner shell of the steel tower correspond to the vertical ribs on the inner shell of the steel shell concrete combined tower from top to bottom.

3. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 2, characterized in that: go up between the interior casing of column and the shell body and be equipped with vertical branch storehouse steel sheet and will interior, space between the shell body falls into a plurality of storehouses between the shell body down between the interior casing of column respectively, go up the column and correspond from top to bottom with the branch storehouse steel sheet in the column down, go up all to be equipped with vertical rib on the branch storehouse steel sheet in column and the column down, just go up column and correspond from top to bottom with the vertical rib on the branch storehouse steel sheet in the column down.

4. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 3, characterized in that: the vertical ribs of the steel shell concrete combined tower are vertical perforated ribs penetrated with annular reinforcing steel bars, the vertical perforated ribs are connected to the annular perforated ribs penetrated with the vertical reinforcing steel bars, the annular perforated ribs extend along the periphery of the inner surface of the outer shell, the periphery of the outer surface of the inner shell and the width direction of the bin steel plates and are connected into a whole, a plurality of the annular perforated ribs are vertically arranged, and the vertical perforated ribs, the annular perforated ribs and the perforated reinforcing steel bars form PBL shear connectors; the vertical ribs of the steel tower are connected to the circumferential ribs, the circumferential ribs extend along the periphery of the inner surface of the outer shell, the periphery of the outer surface of the inner shell and the width direction of the bin dividing steel plate and are connected into a whole, and the number of the circumferential ribs is vertically arranged; the annular reinforcing steel bars of the vertical perforated ribs on the outer shell, the inner shell and the bin dividing steel plate are connected through tie bars, and the annular perforated ribs on the outer shell, the inner shell and the bin dividing steel plate are connected through profile steel connecting pieces.

5. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 4, characterized in that: the combined section comprises a pressure-bearing partition plate which is transversely arranged at the junction position of the upper tower column and the lower tower column, the outer edge and the inner edge of the pressure-bearing partition plate are respectively connected with the inner surface of the outer shell and the outer surface of the inner shell, the vertical rib of the upper tower column, the bin-dividing steel plate and the vertical rib on the bin-dividing steel plate are respectively connected with the upper surface of the pressure-bearing partition plate, the vertical rib of the lower tower column, the bin-dividing steel plate and the vertical rib on the bin-dividing steel plate are respectively connected with the lower surface of the pressure-bearing partition plate, and a concrete pouring hole is formed in the pressure-bearing partition plate.

6. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 5, characterized in that: shear nails are arranged on the lower surface of the pressure-bearing partition plate, the inner surface of the outer shell and the outer surface of the inner shell of the steel shell concrete combined tower and the bin-dividing steel plates in the lower tower column.

7. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 6, characterized in that: the position top-down that vertical rib on interior casing of steel tower, shell body and the branch storehouse steel sheet is close to the pressure-bearing baffle increases gradually for becoming uprising vertical rib, it has the flange on the vertical rib to uprise, the position that vertical rib on interior casing of steel shell concrete combination tower, shell body and the branch storehouse steel sheet is close to the pressure-bearing baffle increases gradually from bottom to top for becoming uprising vertical rib, the height that becomes vertical rib and the flange of steel tower with the height that becomes vertical rib of steel shell concrete combination tower is the same.

8. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 5, characterized in that: and the edge of the concrete pouring hole of the pressure-bearing partition plate is provided with a folded edge which is bent upwards.

9. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 8, characterized in that: vibration holes are formed in the corner positions of the pressure-bearing partition plates; the widths of the upper parts of the flanges of the height-variable vertical ribs of the steel tower are consistent, and the lower parts of the flanges are in a dovetail shape.

10. A hybrid tower structure of a steel tower and steel shell concrete combined tower according to claim 9, characterized in that: the thickness of the pressure-bearing separator is 20-50 mm; the pressure-bearing partition plate is provided with a plurality of exhaust holes, and the exhaust holes are close to the outer tower wall, the inner tower wall or the bin-dividing steel plate.

Technical Field

The invention belongs to the design technology of a main tower structure of a cable bearing bridge, and particularly relates to a mixed tower structure of a steel tower and a steel shell concrete combined tower.

Background

The cable bearing bridge such as a cable-stayed bridge, a suspension bridge and the like becomes a main alternative bridge type of a landscape bridge due to the structural variability, and the modeling of the main tower structure is a main aesthetic expression window. From the stress perspective, the closer the main tower is to the tower bottom, the greater the internal force is, and the structure size is increased correspondingly. On the other hand, since the main tower structure is constructed as a high-rise structure, the secondary effect of its own bending moment is more significant. Therefore, the conventional main tower design can reduce the section size and the self weight of the upper tower column as much as possible on the premise of ensuring reasonable stress, and the structural size of the middle and lower tower columns is increased to ensure the bearing capacity and the structural rigidity of the middle and lower tower columns. The landscape design of the urban bridge can pursue the coordination and uniformity of the tower and the beam size and the building aesthetics more, for example, the special-shaped bridge tower in the shape of a girdling is adopted to create more change feeling and rhythm feeling, which provides a challenge to how the structural form of the main tower better meets the requirements to integrate the structure and the aesthetics.

Because the bridge landscape needs to adopt the special-shaped bridge tower like the beam waist shape, when the concrete bridge tower is used, the specificity of the outer surface of the concrete bridge tower enables the template to be used only once, and the template cannot be circulated, so that the construction cost is increased. When the steel shell concrete combined tower is used, the combined tower has the advantages that: (1) the steel shell can replace an inner template and an outer template, and more ideal aesthetic modeling and appearance quality can be constructed; (2) the steel shell can replace steel bars, and plays a larger bearing capacity and anti-cracking role because the steel shell is arranged on the outermost side; (3) the steel shell obtains excellent static and dynamic mechanical properties due to high tensile property and ductility capacity and strong tension, compression and bending resistance under the combination with concrete; (4) the steel shell is manufactured in a factory, is constructed in an on-site assembly mode, and improves the product quality and the production efficiency through mechanization, automation and large-scale; (5) the steel shell can protect the concrete surface and the internal reinforcing steel bars from external erosion, the durability is improved, when the external steel plate is a stainless steel composite plate made of materials such as 316L and the like, the external surface can be free of maintenance, and the life cycle cost in corrosive environments such as oceanic environment is lower. When a conventional bridge tower is adopted, the combined tower using the steel shell concrete can play a similar role. Therefore, the steel shell concrete combined tower represents one of the development directions of the modern bridge tower.

However, the steel shell concrete combined tower has a much smaller internal force, especially a much smaller axial force, than the middle lower part of the tower at the upper part of the tower, and the steel shell is easy to satisfy the compression stability.

Disclosure of Invention

The invention aims to provide a mixed tower structure of a steel tower and a steel shell concrete combined tower, which can shorten the construction period, reduce the construction cost, greatly reduce the mass of the upper part of the tower and reduce the earthquake response of the bearing capacity of the tower bottom.

The purpose of the invention is realized by the following technical scheme: the utility model provides a mixed tower structure of steel tower and steel-shelled concrete combined tower, its characterized in that, it includes from last king-post, combination section and the king-post that sets gradually down, it is the steel tower to go up the king-post, the king-post is steel-shelled concrete combined tower down, it passes through combination section transition to king-post down to go up the king-post.

The invention adopts the structure form of the mixed tower with the upper tower column being a steel tower and the lower tower column being a steel shell concrete combined tower, and the combination section is arranged between the tower columns, so that the invention can be used for the main tower with a more complex appearance, has good appearance quality, good crack resistance and durability of the tower wall and short construction period, and the lower tower column being the steel shell concrete combined tower can reduce the plate thickness, reduce the processing difficulty and save the manufacturing cost; the upper tower column is a steel tower, so that the problem of structural dead weight increase caused by the increase of modeling scale can be solved, or the upper tower column stress requirement reduction condition of a main tower of a cable-stayed bridge can be adapted, the mass of the upper part of the tower can be greatly reduced, and the seismic response of the bearing capacity of the tower bottom is reduced. The invention can provide more choices on the design of the main tower of the bridge, and has the advantages of industrialized construction, better structural performance and richer modeling.

The upper tower column and the lower tower column respectively comprise an inner shell and an outer shell sleeved on the inner shell, the inner shells and the outer shells of the upper tower column and the lower tower column respectively extend up and down to be connected into a whole, and a plurality of vertical ribs are respectively arranged on the inner surfaces of the outer shells of the upper tower column and the lower tower column and on the outer surface of the inner shell along the circumferential direction of the inner shells; the vertical ribs on the outer shell of the steel tower correspond to the vertical ribs on the outer shell of the steel shell concrete combined tower from top to bottom, and the vertical ribs on the inner shell of the steel tower correspond to the vertical ribs on the inner shell of the steel shell concrete combined tower from top to bottom. The vertical ribs are aligned centrally to ensure continuity of force flow.

According to the invention, vertical bin-dividing steel plates are respectively arranged between the inner shell and the outer shell of the upper tower column and between the inner shell and the outer shell of the lower tower column to divide the space between the inner shell and the outer shell into a plurality of bins, the bin-dividing steel plates in the upper tower column and the lower tower column are vertically corresponding, vertical ribs are respectively arranged on the bin-dividing steel plates in the upper tower column and the lower tower column, and the vertical ribs on the bin-dividing steel plates in the upper tower column and the lower tower column are vertically corresponding. The vertical ribs are aligned centrally to ensure continuity of force flow.

The vertical ribs of the steel shell concrete combined tower are vertical perforated ribs penetrated with annular reinforcing steel bars, the vertical perforated ribs are connected to the annular perforated ribs penetrated with the vertical reinforcing steel bars, the annular perforated ribs extend along the periphery of the inner surface of the outer shell, the periphery of the outer surface of the inner shell and the width direction of the bin steel plates and are connected into a whole, a plurality of the annular perforated ribs are vertically arranged, and the vertical perforated ribs, the annular perforated ribs and the perforated reinforcing steel bars form PBL shear connectors; the vertical ribs of the steel tower are connected to the circumferential ribs, the circumferential ribs extend along the periphery of the inner surface of the outer shell, the periphery of the outer surface of the inner shell and the width direction of the bin dividing steel plate and are connected into a whole, and the number of the circumferential ribs is vertically arranged; the annular reinforcing steel bars of the vertical perforated ribs on the outer shell, the inner shell and the bin dividing steel plate are connected through tie bars, and the annular perforated ribs on the outer shell, the inner shell and the bin dividing steel plate are connected through profile steel connecting pieces.

The combination section comprises a pressure-bearing partition plate which is transversely arranged at the junction position of the upper tower column and the lower tower column, the outer edge and the inner edge of the pressure-bearing partition plate are respectively connected with the inner surface of the outer shell and the outer surface of the inner shell, the vertical ribs of the upper tower column, the bin dividing steel plates and the vertical ribs on the bin dividing steel plates are respectively connected with the upper surface of the pressure-bearing partition plate, the vertical ribs of the lower tower column, the bin dividing steel plates and the vertical ribs on the bin dividing steel plates are respectively connected with the lower surface of the pressure-bearing partition plate, and concrete pouring holes are formed in the pressure-bearing partition plate.

Shear nails are arranged on the lower surface of the pressure-bearing partition plate, the inner surface of the outer shell and the outer surface of the inner shell of the steel shell concrete combined tower and bin-dividing steel plates in the lower tower column.

The positions of the vertical ribs on the inner shell, the outer shell and the bin dividing steel plate of the steel tower, which are close to the pressure-bearing partition plate, are gradually increased from top to bottom to form the height-increasing vertical ribs, the positions of the vertical ribs on the inner shell, the outer shell and the bin dividing steel plate of the steel tower, which are close to the pressure-bearing partition plate, are gradually increased from bottom to top to form the height-increasing vertical ribs, and the heights of the height-increasing vertical ribs and the flanges of the height-increasing vertical ribs of the steel tower are the same as the height of the height-increasing vertical ribs of the steel shell concrete combined tower.

The hole edge of the concrete pouring hole of the pressure-bearing partition plate is provided with a folded edge which is bent upwards. Before concrete is poured, the folded edge is used as a stiffening rib of the pressure-bearing partition plate, the rigidity and the integral integrity of the segments of the pressure-bearing partition plate can be guaranteed, super pouring can be performed when the concrete is poured, the folded edge is beneficial to discharging air bubbles below the pressure-bearing partition plate through pressure difference formed by the super pouring, and the pouring compactness of the concrete is improved.

The invention is provided with vibrating holes at the corner positions of the pressure-bearing partition plate.

The pressure-bearing partition plate is provided with a plurality of exhaust holes, and the exhaust holes are close to the outer tower wall, the inner tower wall or the bin-dividing steel plate.

The widths of the upper parts of the flanges of the variable-height vertical ribs of the steel tower are consistent, and the lower parts of the flanges are in a dovetail shape.

The thickness of the pressure-bearing separator is 20-50 mm.

Compared with the prior art, the invention has the following remarkable effects:

(1) the invention adopts the structure form of the mixed tower that the upper tower column is a steel tower and the lower tower column is a steel shell concrete combined tower, and the combination section of the pressure-bearing partition plate is arranged between the tower columns, so that the invention can be used for the main tower with a complex appearance, has good appearance quality, good crack resistance and durability of the tower wall and short construction period, and the lower tower column is the steel shell concrete combined tower, can reduce the plate thickness, reduce the processing difficulty and save the manufacturing cost; the upper tower column is a steel tower, so that the problem of structural dead weight increase caused by the increase of modeling scale can be solved, or the upper tower column stress requirement reduction condition of a main tower of a cable-stayed bridge can be adapted, the mass of the upper part of the tower can be greatly reduced, and the seismic response of the bearing capacity of the tower bottom is reduced.

(2) The inner wall and the outer wall of the combined section of the steel tower and the steel shell concrete combined tower are communicated with the bin-dividing steel plates continuously, so that the force flow of the tower wall of the steel tower can be continuously transmitted to the steel shell of the steel shell concrete section combined tower.

(3) According to the invention, the variable-height T rib is welded on the pressure-bearing partition plate in the steel tower above the pressure-bearing partition plate, the variable-height PBL plate rib is welded on the combined tower below the pressure-bearing partition plate, part of internal force of the vertical plate in the steel tower is diffused into concrete through the variable-height T rib, the pressure-bearing partition plate, the variable-height PBL plate rib below the partition plate and the shear nails on the vertical plate, and the load of the steel structure of the main tower can be diffused into the concrete as soon as possible.

(4) The vertical ribs of the steel tower and the vertical ribs of the steel shell concrete combined tower are aligned in the center to ensure the continuity of force flow.

(5) According to the invention, the shear nails are arranged on the lower surface of the pressure-bearing partition plate, which is in contact with concrete, and the tower wall of the steel shell concrete combined tower, and are matched with the pressure-bearing partition plate and the vertical ribs penetrating through the reinforcing steel bars to uniformly transfer the internal force of the steel tower to the concrete, so that excessive local stress or void of the concrete is avoided, and the synergy of the stress of the steel shell and the concrete is ensured.

(6) The hole edge of the concrete pouring hole is provided with the folded edge which is bent upwards, the folded edge is used as a stiffening rib of the pressure-bearing partition plate before concrete is poured, the rigidity and the integral integrity of the sections of the pressure-bearing partition plate can be ensured, the concrete can be super-poured during the concrete pouring, and the folded edge is beneficial to discharging air bubbles below the pressure-bearing partition plate through the pressure difference formed by the super-pouring, so that the pouring compactness of the concrete is increased.

(7) The main tower is a steel tower at the part close to the top of the tower or at the anchoring section of all guys, so that the dead weight of the main tower is reduced, concrete overhead operation is avoided, and the construction period is shortened. When the middle and lower tower columns are stressed greatly or the landscape modeling size is limited, the steel shell concrete combined tower is adopted to improve the structural resistance and rigidity. Through the organic combination of the tower sections, the organic unification of the structural performance, the structural safety and the landscape modeling is realized.

(8) When the concrete bridge tower is adopted, the steel shell is adopted to replace a disposable template which cannot be repeatedly used, and excellent construction performance, service performance and economic performance are obtained; when the steel tower is adopted, the processing difficulty of the lower tower column thick steel plate with large stress on the special-shaped curved surface is extremely high, the requirement of the thin steel plate on the processing of the special-shaped curved surface is relatively small, and the processing difficulty of the special-shaped curved surface steel tower can be greatly reduced by adopting the invention; when the steel shell concrete combined bridge tower is adopted, the steel tower can be adopted when the upper tower column is stressed less or has a weight reduction requirement; the middle and lower tower columns with larger stress adopt the steel shell concrete combined tower, the thickness of a steel plate is reduced through a steel shell combined structure with large bearing capacity, the processing difficulty of the special-shaped curved surface can be reduced on the premise of ensuring the safety of the structure, and the labor cost and the manufacturing cost are saved.

(9) The invention can realize the modeling diversity of the main tower structures of cable bearing bridges such as cable-stayed bridges, suspension bridges and the like, provides more choices and ideas for urban landscape bridges, and has the advantages of simple structure, low construction cost and strong practicability, thereby being suitable for wide popularization and use.

Drawings

The invention is described in further detail below with reference to the figures and the specific embodiments.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of a steel shell concrete composite tower of the present invention;

FIG. 3 is a schematic cross-sectional view of a steel tower of the present invention;

FIG. 4 is a schematic cross-sectional view of a steel tower of the present invention adjacent a pressure-containing deck;

FIG. 5 is one of the schematic vertical cross-sectional views of the interface of the upper and lower towers of the present invention;

FIG. 6 is a second schematic vertical cross-sectional view of the interface between the upper and lower towers of the present invention;

fig. 7 is a schematic view of the lower tower column grid framework structure of the present invention.

Detailed Description

As shown in fig. 1 to 7, the hybrid tower structure of the steel tower and the steel shell concrete combined tower of the present invention comprises an upper tower column, a combining section 24 and a lower tower column, which are sequentially arranged from top to bottom, wherein the upper tower column is a steel tower 2, the lower tower column is a steel shell concrete combined tower 3, and the upper tower column is transited to the lower tower column through the combining section 24. Go up the pylon and all include interior casing 5 and the shell body 4 of cover on interior casing 5 down the pylon, and go up the pylon and extend about even as an organic whole with the interior casing 5 of lower pylon, the central cavity 25 that interior casing 5 encloses is elevator and cat ladder space usually, and this space can be as big as possible in order to reduce the material quantity, goes up the pylon and extends about the shell body 4 of lower pylon even as an organic whole. The inner shell 5 and the outer shell 4 can be regular in shape, and can also be machined or thermally treated to form a special-shaped curved surface, in the embodiment, the cross-sectional contour line of the inner shell 5 of the upper tower column is a rectangular shape, the cross-sectional contour line of the outer shell 4 is a separate twisted curved surface consisting of two circular arcs and a straight line, the cross-sectional contour line of the inner shell 5 of the lower tower column is a rectangular shape, and the cross-sectional contour line of the outer shell 4 is a twisted curved surface consisting of circular arcs and straight lines, besides, the cross section can also be set to be circular, rectangular and other various cross-sectional forms as required.

Vertical compartment steel plates 6 are respectively arranged between the inner shell 5 and the outer shell 4 of the upper tower column and between the inner shell 5 and the outer shell 4 of the lower tower column to divide the space between the inner shell and the outer shell into a plurality of compartments, and the compartment steel plates 6 in the upper tower column and the lower tower column are vertically corresponding. A plurality of vertical ribs 7 are respectively arranged on the inner surface of the outer shell 4 of the upper tower column and the outer surface of the inner shell 5 along the circumferential direction, a plurality of vertical ribs 7 are respectively arranged on the inner surface of the outer shell 4 of the lower tower column and the outer surface of the inner shell 5 along the circumferential direction, and the vertical ribs 7 are respectively arranged on the bin steel plates 6 in the upper tower column and the lower tower column along the width direction. The vertical ribs 7 on the outer shell 4 of the steel tower 2 correspond to the vertical ribs 7 on the outer shell 4 of the steel shell concrete combined tower 3 up and down, the vertical ribs 7 on the inner shell 5 of the steel tower 2 correspond to the vertical ribs 7 on the inner shell 5 of the steel shell concrete combined tower 3 up and down, the vertical ribs 7 on the bin steel plates 6 in the upper tower column and the lower tower column correspond up and down, and the centers of the vertical ribs are aligned to ensure the continuity of force flow. The combination section 24 includes transversely sets up the pressure-bearing baffle 1 at last column and lower column juncture position, the thickness of pressure-bearing baffle 1 is 20mm ~ 50mm, the outside border of pressure-bearing baffle 1 and the internal surface welding of shell body 4, the interior border of pressure-bearing baffle 1 and the surface welding of interior casing 5, the lower extreme of the vertical rib 7 of going up the column and the upper surface welding of pressure-bearing baffle 1, the upper end of the vertical rib 7 of lower column and the lower surface welding of pressure-bearing baffle 1, it has concrete placement hole 10 to open on pressure-bearing baffle 1.

The parts of the vertical ribs 7 on the inner shell 5, the outer shell 4 and the bin steel plate 6 of the steel tower 2, which are close to the pressure-bearing partition plate 1, are gradually increased from top to bottom to form height-increasing vertical ribs 9, flanges 8 are arranged on the height-increasing vertical ribs 9, the widths of the upper parts of the flanges 8 are consistent, the lower parts of the flanges 8 are in a dovetail shape, and the height-increasing vertical ribs 9 and the lower ends of the flanges 8 are welded on the upper surface of the pressure-bearing partition plate 1. The parts of the vertical ribs 7 on the inner shell 5, the outer shell 4 and the bin steel plates 6 of the steel shell concrete combined tower 3, which are close to the pressure-bearing partition plate 1, are gradually heightened from bottom to top to become height-changing vertical ribs 9, and the upper ends of the height-changing vertical ribs 9 are welded on the lower surface of the pressure-bearing partition plate 1. The height of the height-variable vertical rib 9 of the steel tower 2 and the flange 8 thereof is the same as the height of the height-variable vertical rib 9 of the steel shell concrete combined tower 3.

Shear nails 14 are arranged on the lower surface of the pressure-bearing partition plate 1, the inner surface of the outer shell 4 of the steel shell concrete combined tower 3, the outer surface of the inner shell 5 and the bin-dividing steel plates 6 in the lower tower column, and the shear nails are welded nails. The vertical rib 7 of the steel tower 2 is connected on the circumferential rib 26, the circumferential rib 26 extends along the periphery of the inner surface of the outer shell 4, the periphery of the outer surface of the inner shell 5 and the width direction of the bin steel plate 6 respectively and is connected into a whole, and the circumferential rib 26 is vertically provided with a plurality of ribs. The vertical rib 7 of the steel shell concrete combined tower 3 is a vertical perforated rib penetrated with an annular reinforcing steel bar 15, the vertical perforated rib is connected to a circumferential perforated rib 20 penetrated with the vertical reinforcing steel bar, the circumferential perforated rib 20 extends along the periphery of the inner surface of the outer shell 4, the periphery of the outer surface of the inner shell 5 and the width direction of 6 parts of the bin steel plate respectively and is connected into a whole, and the vertical perforated rib, the circumferential perforated rib 20 and the perforated reinforcing steel bar form a PBL shear connector.

Referring to fig. 2 and 7, under the pressure-bearing partition plate 1, the circumferential open-hole ribs 20 on the outer shell 4, the inner shell 5 and the bin-dividing steel plate 6 are connected through the section steel connecting pieces 22, the annular reinforcing steel bars 15 of the vertical open-hole ribs on the outer shell 4, the inner shell 5 and the bin-dividing steel plate 6 are connected through the tie bars to form a multi-layer reinforcing steel bar net rack 16, and the reinforcing steel bar net rack 16 and the annular reinforcing steel bars 15 are overlapped to form a grid framework structure. On one hand, the anti-cracking capacity of the concrete surface is enhanced by the net rack reinforcing steel bars, and on the other hand, the pressure stress of the pressure-bearing partition plate and the stress transmitted by the PBL shear keys are transmitted to deep-layer concrete, so that the uniform stress of the concrete is better ensured.

The hole edge of the concrete pouring hole 10 in the pressure-bearing clapboard 1 is provided with an upward bent hem 11, before concrete is poured, the hem 11 is used as a stiffening rib of the pressure-bearing clapboard 1, the rigidity and the integral integrity of the sections of the pressure-bearing clapboard 1 can be ensured, super pouring can be carried out during concrete pouring, and the hem 11 is beneficial to discharging air bubbles below the pressure-bearing clapboard 1 through the pressure difference formed by the super pouring, so that the concrete pouring compactness is increased. The corner position of the pressure-bearing clapboard 1 is provided with a vibrating hole 12, and the distance between the vibrating hole 12 and the board edge is about 100 mm. And a plurality of vent holes 13 are formed in the pressure-bearing partition plate 1, some vent holes 13 are close to the outer tower wall 4, some vent holes 13 are close to the inner tower wall 5, and some vent holes 13 are close to the bin-dividing steel plate 6.

Usually, a steel tower 2 can be adopted in all or part of the cable anchoring section of the main tower of the cable-stayed bridge and the upper tower column of the main tower of the suspension bridge, and then the steel tower is transited to a steel shell concrete combined tower 3 through a combining section. According to the conditions of bridge anticorrosion, stress state, modeling dimension requirements and the like, the steel shell concrete combined tower 3 can be further transited to a reinforced concrete tower column.

The thickened pressure-bearing partition plate 1 is arranged at the junction position of a steel tower 2 and a steel shell concrete combined tower 3, the steel tower 2 above the pressure-bearing partition plate 1 is welded on the pressure-bearing partition plate 1 through a height-variable vertical rib, the steel shell concrete combined tower 3 below the pressure-bearing partition plate 1 is welded through a height-variable PBL plate rib, partial internal force of an outer tower wall, an inner tower wall and a bin-dividing steel plate of the steel tower is diffused into concrete 17 through the height-variable vertical rib, the pressure-bearing partition plate, the height-variable PBL plate rib below the pressure-bearing partition plate and a shear nail on a vertical plate, and the load of a main tower steel structure can be diffused into the concrete as soon as possible through the structure.

The contour line of the cross section of the invention can be various combination forms such as rectangle, circle, ellipse, circular arc + straight line, polygon and the like.

The steel shell concrete combined tower is designed in a vertical sectional mode and manufactured in factories according to transportation and field hoisting capacity. When the vertical assembly of each segment is carried out on a construction site, steel plates between the segments are directly butt-welded, and stiffening ribs are generally connected through the embedding segments. And the self-compensating shrinkage concrete is filled between the inner shell body and the outer shell body, the concrete, the perforated steel bars and the profile steel connecting pieces jointly form a reinforced concrete structure, and the reinforced concrete structure is combined with the inner shell body and the outer shell body through the shear nails and the longitudinal and transverse PBL shear connecting pieces to bear force in a synergic manner. The steel tower segments can be connected by welding or bolting.

The embodiments of the present invention are not limited thereto, and according to the above-mentioned contents of the present invention, the present invention can be modified, substituted or changed in other various forms without departing from the basic technical idea of the present invention.