Steel pipe column structure of subway station
By introducing annular steel plates and outer steel pipes into the steel pipe column structure of the subway station, the problems of long initial settling time and insufficient seismic resistance of concrete in the pile are solved, and efficient construction and structural stability are improved.
Patent Information
- Application Number
- CN202422238775.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-12
AI Technical Summary
During the construction of the subway station, the two-stage pouring method of integrated piles and columns leads to a long initial settling time for the concrete in the pile, affecting the construction progress, and is prone to concentrated stress on the steel pipe column foot during earthquakes, resulting in unstable structure.
It adopts a subway station steel pipe column structure, including holes, steel cages, steel pipe columns, tool columns, annular steel plates and outer steel pipes. Through the arrangement of the annular steel plate, the concrete pouring in the pile is blocked and integrated casting is achieved; the outer steel pipe and the interlayer material impose constraints on the plastic hinges of the steel pipe columns to improve seismic resistance.
While ensuring the quality of concrete in the pile, it reduces the initial settling time of concrete in the pile, improves construction efficiency, and avoids the local plastic buckling of the steel pipe column in earthquakes by increasing seismic resistance.
Smart Images
Figure CN223017992U_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of construction of permanent steel pipe structural columns using a cover-and-cut method, and in particular to a steel pipe column structure for a subway station. Background Art
[0002] In order to restore the road traffic as soon as possible during the construction of subway stations, the cover-and-cut method is usually used. The construction method of steel pipe columns often adopts pile-column integrated construction, which requires first hanging the steel cage and then hanging the steel pipe column, and then pouring concrete in two stages. This construction method has the following defects:
[0003] 1. Two-stage pouring is often used in the construction of pile-column integration. In order to avoid the upwelling of concrete in the pile when pouring the concrete in the column, it is necessary to wait for the initial setting of the concrete in the pile, then fill the gap between the pile hole and the steel pipe column with fine sand, and then pour the concrete in the column. It is impossible to achieve integrated pouring. At the same time, the initial setting of the concrete in the pile takes a certain amount of time, which has an adverse effect on the construction progress.
[0004] 2. When an earthquake occurs, stress concentration is likely to occur at the base of the steel pipe column, causing the steel pipe to buckle and break, and the concrete in the column to be crushed, which has an adverse effect on the safety and stability of the structure. Utility Model Content
[0005] The invention discloses a steel pipe column structure for a subway station, aiming to solve the problems described in the background technology parts 1 and 2.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A subway station steel pipe column structure comprises a hole, a steel cage, a steel pipe column, a tool column, an annular steel plate, and an outer sleeve steel pipe. The hole is excavated vertically in the ground at a construction location. The steel cage is built in the lower part of the hole and is used to prepare a concrete pile to be cast. The lower part of the steel pipe column is inserted into the steel cage. The top of the steel pipe column is welded and fixed to the bottom end of the tool column. The upper part of the tool column extends out of the hole and is connected to the ground through a bracket mechanism. An annular steel plate is coaxially welded on the outer periphery of the steel pipe column and located at a preset pile top position of the concrete pile. The annular steel plate is arranged horizontally, and a gap is reserved between the outer edge of the annular steel plate and the inner surface of the hole. An outer sleeve steel pipe is arranged on the outer periphery of the plastic hinge of the steel pipe column above the annular steel plate, and a filler layer is arranged between the inner surface of the outer sleeve steel pipe and the outer surface of the steel pipe column. The bottom end of the outer sleeve steel pipe and the top end of the annular steel plate are separated from each other.
[0008] Preferably, the tool column is coaxially welded and fixed to the steel pipe column, and the bracket mechanism includes a positioning bracket and a limit block. The positioning bracket fixes the outer wall of the tool column extending out of the hole to the ground, and a limit block is provided on the top of the positioning bracket. The limit blocks are respectively connected to the positioning bracket and the tool column.
[0009] Preferably, there are 4 limiting blocks, which are evenly distributed around the tool column. The 4 limiting blocks are respectively welded and fixed to the outer wall of the tool column and the top of the positioning bracket, and are used to limit the radial and axial positions of the tool column relative to the hole.
[0010] Preferably, the steel pipe column is coaxially arranged with the steel reinforcement cage, and the lower part of the steel pipe column and the steel reinforcement cage are welded and fixed every 50 cm through steel bars.
[0011] Preferably, the inner edge of the annular steel plate is sealed and welded to the outer surface of the steel pipe column, and the annular steel plate is a steel plate without holes.
[0012] Preferably, the length of the lower part of the steel pipe column extending into the steel reinforcement cage is 2.5 m.
[0013] Preferably, the outer steel pipe is coaxially welded and fixed to the outer wall of the steel pipe column through steel bars.
[0014] Preferably, the outer steel pipe is formed by welding two semi-circular curved plates.
[0015] Preferably, the filler layer is made of concrete or grouting material.
[0016] Advantages of the steel pipe column structure of the new type for subway stations:
[0017] Through the block of the annular steel plate, the upwelling of the concrete in the pile can be slowed down while ensuring the upwelling of the concrete in the steel pipe column, and integral pouring can be realized, allowing a small amount of cement to upwell from the gap to ensure the quality of the concrete in the pile. By applying constraints to the potential plastic hinge of the steel pipe column through the outer steel pipe and the sandwich material, the local plastic buckling of the steel pipe column can be delayed or avoided, and the seismic performance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the new type, the drawings required for use in the embodiments are briefly introduced below, and they form a part of the specification and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation to the present invention.
[0019] Figure 1 Schematic cross-sectional structure diagram of the new type;
[0020] Figure 2 Schematic diagram of the annular steel plate;
[0021] 1. Material guiding pipe; 2. Positioning bracket; 3. Outer steel pipe; 4. Pile top; 5. Steel reinforcement cage; 6. Annular steel plate; 7. Steel pipe column; 8. Contact surface; 9. Tool column; 10. Hole; 11. Gap; 12. Limiting block. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The following will clearly and completely describe the technical solutions in the present new model in conjunction with the accompanying drawings in the embodiments of the present new model. Obviously, the described embodiments are only a part of the embodiments of the present new model, rather than all the embodiments. Based on the embodiments in the present new model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present new model.
[0023] The following embodiments can be understood as separately explaining the local structure of the present new model, or can be understood as explaining the structure of a larger scope of the present new model through the combination of multiple embodiments.
[0024] In this embodiment, a steel pipe column structure of a subway station, as Figure 1 , 2 shown, includes a hole 10, a steel reinforcement cage 5, a steel pipe column 7, a tool column 9, an annular steel plate 6, and an outer steel pipe 3. The hole 10 is vertically excavated in the ground at the construction position. The steel reinforcement cage 5 is placed inside the lower part of the hole 10 and is used to prepare a concrete pile to be cast and formed. The lower part of the steel pipe column 7 is inserted into the inside of the steel reinforcement cage 5. The top end of the steel pipe column 7 is fixedly welded to the bottom end of the tool column 9. The upper part of the tool column 9 extends out of the hole 10 and is connected to the ground through a support mechanism. An annular steel plate 6 is coaxially welded to the outer periphery of the steel pipe column 7 at the position of the preset pile top 4 of the concrete pile. The annular steel plate 6 is horizontally arranged, and there is a gap 11 reserved between the outer edge of the annular steel plate 6 and the inner surface of the hole 10. An outer steel pipe 3 is provided on the outer periphery of the plastic hinge of the steel pipe column 7 above the annular steel plate 6. There is a filler layer between the inner surface of the outer steel pipe 3 and the outer surface of the steel pipe column 7. The bottom end of the outer steel pipe 3 is separated from the top end of the annular steel plate 6.
[0025] In a further embodiment, as Figure 1 shown, the tool column 9 is fixedly welded to the steel pipe column 7 coaxially. The support mechanism includes a positioning support 2 and a limit block 12. The positioning support 2 fixedly connects the outer wall of the tool column 9 extending out of the hole 10 to the ground. A limit block 12 is provided at the top end of the positioning support 2. The limit block 12 is connected to the positioning support 2 and the tool column 9 respectively.
[0026] In a further embodiment, as Figure 1 shown, there are 4 limit blocks 12. The 4 limit blocks 12 are evenly distributed around the tool column 9. The 4 limit blocks 12 are respectively welded and fixed to the outer wall of the tool column 9 and the top of the positioning support 2, and are used to limit the radial and axial positions of the tool column 9 relative to the hole 10.
[0027] In a further embodiment, as Figure 1 shown, the steel pipe column 7 and the steel reinforcement cage 5 are coaxially arranged. The lower part of the steel pipe column 7 and the steel reinforcement cage 5 are fixedly welded by steel bars at intervals of 50 cm.
[0028] In a further embodiment, as Figure 1 and 2 shown, the inner edge of the annular steel plate 6 is fixedly sealed and welded to the outer surface of the steel pipe column 7, and the annular steel plate 6 is a perforation-free steel plate.
[0029] In a further embodiment, as Figure 1 shown, the length of the lower part of the steel pipe column 7 extending into the steel reinforcement cage 5 is 2.5 m.
[0030] In a further embodiment, as Figure 1 shown, the outer steel pipe 3 is coaxially welded and fixed to the outer wall of the steel pipe column 7 by steel bars.
[0031] In a further embodiment, as Figure 1 shown, the outer steel pipe 3 is formed by welding two semi-circular curved plates.
[0032] In a further embodiment, as Figure 1 shown, the filler layer is made of concrete or grouting material.
[0033] Principle of use of this new type:
[0034] When pouring concrete, the material guiding pipe 1 is inserted into the upper end opening of the steel pipe column 7. When the height of the concrete reaches the welding position of the annular steel plate 6, due to the blockage of the annular steel plate 6, the upwelling of the concrete in the pile slows down after reaching the required height, and the concrete in the column keeps upwelling and is not affected. In addition, by setting the outer steel pipe 3 and the sandwich material, the potential plastic hinge of the steel pipe column 7 can be constrained to delay or avoid local plastic buckling of the steel pipe column.
Claims
1. A subway station steel pipe column structure, characterized by: It includes a hole, a steel cage, a steel pipe column, a tool column, an annular steel plate, and an outer sleeve steel pipe. The hole is excavated vertically on the ground at the construction location. The steel cage is built in the lower part of the hole and is used to prepare the concrete pile to be cast. The lower part of the steel pipe column is inserted into the steel cage. The top of the steel pipe column is welded and fixed to the bottom end of the tool column. The upper part of the tool column extends out of the hole and is connected to the ground through a bracket mechanism. An annular steel plate is coaxially welded on the outer periphery of the steel pipe column and located at the preset pile top position of the concrete pile. The annular steel plate is horizontally arranged, and a gap is reserved between the outer edge of the annular steel plate and the inner surface of the hole. An outer sleeve steel pipe is provided on the outer periphery of the plastic hinge of the steel pipe column above the annular steel plate, and a filler layer is provided between the inner surface of the outer sleeve steel pipe and the outer surface of the steel pipe column, and the bottom end of the outer sleeve steel pipe and the top end of the annular steel plate are separated from each other.
2. A subway station steel pipe column structure as claimed in claim 1, characterized in that: The tool column is coaxially welded and fixed with the steel pipe column. The bracket mechanism includes a positioning bracket and a limit block. The positioning bracket fixes the outer wall of the tool column extending out of the hole to the ground. A limit block is provided on the top of the positioning bracket. The limit blocks are respectively connected to the positioning bracket and the tool column.
3. A subway station steel pipe column structure as claimed in claim 2, characterized in that: There are four limit blocks, which are evenly distributed around the tool column. The four limit blocks are respectively welded and fixed to the outer wall of the tool column and the top of the positioning bracket, and are used to limit the radial and axial positions of the tool column relative to the hole.
4. A subway station steel pipe column structure as claimed in claim 1, characterized in that: The steel pipe column is coaxially arranged with the steel cage, and the lower part of the steel pipe column is fixed to the steel cage by steel bar welding at intervals of 50 cm.
5. The subway station steel pipe column structure according to claim 1, characterized in that: The inner edge of the annular steel plate is sealed and welded to the outer surface of the steel pipe column, and the annular steel plate is a non-porous steel plate.
6. The subway station steel pipe column structure according to claim 1, characterized in that: The length of the lower part of the steel pipe column extending into the steel cage is 2.5m.
7. The subway station steel pipe column structure according to claim 1, characterized in that: The outer sleeve steel pipe is fixed by coaxial welding with the outer wall of the steel pipe column through the steel bars.
8. The subway station steel pipe column structure according to claim 1, characterized in that: The outer jacket steel pipe is formed by welding two semicircular arc-shaped curved plates.
9. The subway station steel pipe column structure according to claim 1, characterized in that: The filler layer is made of concrete or grouting material.