Railway station precast segment assembly canopy column beam joint connection structure and installation method

Abstract

The present application relates to a kind of railway platform prefabricated segment assembly canopy column beam node connection structure and installation method, belong to building structure engineering technical field.It is by prefabricated canopy column and prefabricated canopy beam, and by socket reserved steel pipe concrete and the connecting mode of welded reinforcement, prefabricated canopy column and prefabricated canopy beam are connected into a whole;The prefabricated canopy column is by canopy column longitudinal reinforcement, canopy column stirrup, steel mesh, shear nail, corrugated steel wall, canopy column construction stirrup, canopy column construction longitudinal reinforcement, key, reserved corrugated pipe composition;The prefabricated canopy beam is by steel pipe, steel pipe concrete, key, welded reinforcement jointly composition.The present application can satisfy the seismic demand of high intensity area station fabricated canopy beam column node, ensure construction quality, while greatly speed up the construction speed and construction convenience of canopy, can provide a kind of new technical solution for station prefabricated fabricated canopy technology application.

Description

TECHNICAL FIELD

[0001] The present application relates to a railway platform prefabricated segment assembled canopy column-beam joint connection structure and installation method, belonging to the technical field of building structure engineering. BACKGROUND

[0002] In recent years, China's railway construction has developed rapidly, and the platform canopy engineering, as an important part of the railway station, is the traffic channel and the crowd waiting position between the train and the station building, which is self-evident. At present, the commonly used canopy structure types are reinforced concrete canopy and steel structure canopy. The traditional reinforced concrete canopy construction adopts the construction technology of site pouring, which has problems of long construction period, high environmental pollution and high transportation condition requirements, while the steel structure canopy has problems of easy corrosion and easy instability.

[0003] The prefabricated structure technology, as an advanced construction technology, has been applied in a certain scale in the areas with seismic intensity of 7 degrees and below in China, which greatly promotes the economic development and environmental protection of the region. The application of prefabricated technology to canopy structure can greatly speed up the construction speed of canopy structure while ensuring the reliable quality of canopy components, and greatly reduce the influence on the surrounding environment and existing traffic. The biggest difference between prefabricated structure and conventional cast-in-place structure is the different connection structure of the joint. The "reliability" and "seismic performance" of the joint of the prefabricated structure are the bottleneck problems that limit its application.

[0004] However, China is located between the Pacific Ring Seismic Belt and the Eurasian Seismic Belt, and the earthquake activity is frequent. When the earthquake comes, the beam-column joint of the platform canopy may appear continuous collapse due to insufficient resistance. As an important part of the railway station, the destruction of the canopy structure will cause huge casualties and property losses, and the consequences are unimaginable. Therefore, it is urgent to propose a prefabricated assembly type canopy column-beam joint connection form suitable for medium and high intensity areas to solve the problems existing in the traditional canopy structure and promote the engineering application of prefabricated railway platform canopy technology, which has important engineering demand background and social and economic benefits. SUMMARY

[0005] In order to solve the problems of the traditional canopy column-beam joint proposed in the background art, the present application proposes a railway platform prefabricated segment assembled canopy column-beam joint connection structure and installation method, which greatly speeds up the construction speed and construction convenience of the canopy while meeting the seismic requirements of the canopy and ensuring the construction quality, and can provide a new solution for the design of canopy column-beam joints in medium and high intensity areas.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] The railway station prefabricated segment assembled canopy column beam joint connecting structure is composed of a prefabricated canopy column and a prefabricated canopy beam, and the prefabricated canopy column and the prefabricated canopy beam are connected into a whole through a socket reserved steel pipe concrete and a welded steel bar connecting mode.

[0008] The prefabricated canopy column is composed of canopy column longitudinal reinforcement, canopy column stirrup, steel mesh, corrugated steel wall, canopy column construction stirrup, canopy column construction longitudinal reinforcement, tooth key and reserved corrugated pipe.

[0009] The welded steel bar is anchored in the interior of the prefabricated canopy beam and is uniformly welded along the inner wall of the steel pipe, and the steel pipe concrete is poured in the interior of the steel pipe, and the steel pipe, the steel pipe concrete and the welded steel bar extend downward along the bottom of the prefabricated canopy beam, thereby forming a joint; the joint extends downward and is inserted into the reserved slot hole of the prefabricated canopy column, and the ultra-high performance concrete UHPC is poured in the gap between the steel pipe and the reserved slot hole; the steel pipe is provided with shear nails on both sides and is uniformly distributed along the outer wall of the steel pipe; the inner wall of the reserved slot hole is provided with a corrugated steel wall, and in addition, the interior of the prefabricated canopy column around the reserved slot hole is further provided with canopy column construction longitudinal reinforcement and canopy column construction stirrup, and the canopy column construction longitudinal reinforcement and the canopy column construction stirrup constrain and position the joint in the interior of the prefabricated canopy column; the steel mesh is further provided in the interior of the prefabricated canopy column at the bottom of the reserved slot hole.

[0010] The canopy column longitudinal reinforcement is embedded in the interior of the prefabricated canopy column, and the outer side of the canopy column longitudinal reinforcement is provided with canopy column stirrup, and the canopy column longitudinal reinforcement and the canopy column stirrup are located outside the canopy column construction stirrup and the canopy column construction longitudinal reinforcement; the prefabricated canopy column is divided into two segments, including an upper prefabricated segment canopy column and a lower prefabricated segment canopy column, and the upper prefabricated segment canopy column and the lower prefabricated segment canopy column are spliced into a whole through a grouting corrugated pipe connecting mode, and the upper prefabricated segment canopy column is provided with a reserved corrugated pipe at the bottom, and the canopy column longitudinal reinforcement in the upper prefabricated segment canopy column and the lower prefabricated segment canopy column is inserted into the reserved corrugated pipe, and the reserved corrugated pipe is further pressed with ultra-high performance concrete UHPC, thereby splicing the upper prefabricated segment canopy column and the lower prefabricated segment canopy column into a whole.

[0011] Further, the welded steel bar is uniformly welded along the inner wall of the steel pipe for at least 12 roots.

[0012] Further, the embedded depth of the welded steel bar extending downward and inserted into the reserved slot hole is 1.5 times the diameter of the steel pipe, and the diameter of the corrugated steel wall is related to the diameter of the prefabricated canopy column.

[0013] Further, the compressive strength of the ultra-high performance concrete UHPC is not less than 120 MPa, and the tensile strength is not less than 10 MPa.

[0014] Further, the interface between the prefabricated canopy column and the prefabricated canopy beam is provided with a toothed key.

[0015] Further, the bottom of the lower prefabricated segment canopy column is provided with a foundation.

[0016] Further, the steel mesh, corrugated steel wall, canopy column construction stirrup, canopy column construction longitudinal reinforcement, toothed key, and reserved corrugated pipe are all arranged in the upper prefabricated segment canopy column.

[0017] The installation method of the railway platform prefabricated segment assembled canopy column-beam joint connection structure is as follows:

[0018] S1, in the factory, the canopy column longitudinal reinforcement and the canopy column stirrup are bound, the corrugated steel wall is pre-buried at the top of the upper prefabricated segment canopy column, the reserved slot hole is arranged and the steel pipe is accurately positioned, the reserved corrugated pipe is arranged at the bottom, the formwork is finally supported, the concrete is poured, and the pouring of the prefabricated canopy column is completed;

[0019] S2, in the factory, the canopy beam construction steel is bound, the steel pipe is arranged, the shear nails are reserved on both sides of the steel pipe, a plurality of welded steels are welded in the inner wall of the steel pipe, the steel pipe and the welded steels in the steel pipe are fixed in the prefabricated canopy beam, the formwork is finally supported, the concrete is poured, and the prefabricated canopy beam is completed;

[0020] S3, the prefabricated canopy column and the prefabricated canopy beam are sent to the construction site, the upper prefabricated segment canopy column and the lower prefabricated segment canopy column are first spliced into one body, the canopy column longitudinal reinforcement is inserted into the reserved corrugated pipe, and then the ultra-high performance concrete UHPC is used for grouting;

[0021] S4, the toothed key is arranged at the interface between the top of the upper prefabricated segment canopy column and the bottom of the prefabricated canopy beam, the joint, i.e. the steel pipe and the steel pipe concrete and the welded steel in the steel pipe extending out of the prefabricated canopy beam are inserted into the reserved slot hole at the top of the upper prefabricated segment canopy column, the levelness and perpendicularity of the structure are adjusted, the ultra-high performance concrete UHPC is poured between the joint and the reserved slot hole, and the prefabricated canopy column and the prefabricated canopy beam are connected into one body.

[0022] The railway platform prefabricated segment assembled canopy column-beam joint connection structure is provided, which can meet the higher seismic requirements and construction quality, greatly accelerate the construction speed of the station canopy, and has the following beneficial effects:

[0023] 1. The present application adopts the technical means of factory processing precast canopy column and canopy beam, the precast segment canopy column adopts the grouting corrugated pipe connection mode, and the precast canopy column and canopy beam adopt the socket type connection mode, which is simple in structure and small in construction difficulty, while ensuring the engineering quality, greatly saving the on-site working time, reducing the labor cost and transportation cost, and reducing the pollution and disturbance to the surrounding environment, and protecting the local ecological environment construction.

[0024] 2. The steel pipe concrete anchored by the canopy column is replaced by welded reinforcement, which adopts the precast assembly form instead of the traditional cast-in-place structure, and at the same time, the longitudinal reinforcement distribution in the canopy beam is not interrupted, the engineering cost and construction precision are reduced, the construction process is simplified, and the construction cost is saved while meeting the seismic performance.

[0025] 3. The toothed key corrugated pipe connection mode is arranged at the junction of the canopy column and the canopy beam, which ensures the shear bearing capacity of the connection interface, reduces the number of welded reinforcement and the anchoring length, and greatly reduces the construction difficulty and precision.

[0026] 4. The precast canopy column has a reserved corrugated steel wall, which is filled with UHPC, greatly reducing the site pouring volume, simple construction process, high engineering quality guarantee, strong durability and fatigue performance, and the existence of shear studs also enhances the bonding performance of the steel pipe concrete, effectively ensuring the seismic performance of the assembled canopy connection joint.

[0027] 5. The steel pipe concrete welded reinforcement is pre-buried in the canopy beam, and the surface of the steel pipe concrete is welded with the main reinforcement in the beam to fix it. This effectively ensures the seismic performance of the assembled canopy beam column connection joint while greatly reducing the construction difficulty.

[0028] 6. The connection mode of the pre-buried steel pipe concrete welded reinforcement of the canopy column can provide a large safety reserve of shear and bending while ensuring the seismic demand of the assembled canopy beam column joint, ensuring a small damage to the plastic hinge area of the canopy column after the earthquake, greatly improving the use function of the bridge structure after the earthquake, and facilitating the rescue and reconstruction work after the earthquake. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic view of the elevation of the precast segment assembled canopy column beam joint connection structure of the railway platform of the present application.

[0030] Figure 2 is Figure 1 A-A sectional view of.

[0031] Figure 3 is Figure 1 B-B sectional view of.

[0032] Figure 4 isFigure 1 A schematic diagram of the CC section.

[0033] Figure 5 yes Figure 1 Schematic diagram of the DD cross section.

[0034] Figure 6 This is a schematic diagram of the connection structure and installation of the prefabricated segmental assembly canopy column-beam joint of the railway platform according to the present invention.

[0035] Figure label:

[0036] 1-Reserved canopy column; 2-Precast canopy beam; 3-Steel-concrete composite pipe; 4-Longitudinal reinforcement of canopy column; 5-Stirrups of canopy column; 6-Steel pipe; 7-Reinforcing mesh; 8-Shear studs; 9-Corrugated steel wall; 10-Structural stirrups of canopy column; 11-Structural longitudinal reinforcement of canopy column; 12-Toothed key; 13-Welded reinforcing bar; 14-Reserved slot; 15-Ultra-high performance concrete (UHPC); 16-Reserved corrugated pipe Detailed Implementation

[0037] The following is in conjunction with the appendix Figures 1-6 The present invention will be further described in detail below to facilitate a clear understanding of the invention, but these descriptions do not constitute a limitation thereof.

[0038] As attached Figures 1-5 As shown, the prefabricated segmental assembly canopy column-beam joint connection structure of the railway platform of the present invention consists of a prefabricated canopy column 1 and a prefabricated canopy beam 2, and the prefabricated canopy column 1 and the prefabricated canopy beam 2 are connected into a whole by a connection method of inserting a pre-reserved steel pipe concrete 3 and welding steel bars 13.

[0039] The prefabricated canopy column 1 is composed of canopy column longitudinal reinforcement 4, canopy column stirrup 5, steel mesh 7, corrugated steel wall 9, canopy column construction stirrup 10, canopy column construction longitudinal reinforcement 11, tooth key 12, and reserved corrugated pipe 16. The prefabricated canopy beam 2 is composed of steel pipe 6, shear nail 8, steel pipe concrete 3, tooth key 12, and welded steel bar 13. The 12 welded steel bars 13 are anchored in the interior of the prefabricated canopy beam 2 and are evenly welded along the inner wall of the steel pipe 6. The steel pipe concrete 3 is poured in the interior of the steel pipe 6. The steel pipe 6, the steel pipe concrete 3, and the welded steel bar 13 extend downward along the bottom of the prefabricated canopy beam 2, thereby forming a joint. The joint extends downward and is inserted into the reserved slot hole 14 of the prefabricated canopy column 1. The embedded depth of the welded steel bar 13 extending downward and inserted into the reserved slot hole 14 is 1.5 times the diameter of the steel pipe 6. The diameter of the corrugated steel wall 9 is related to the diameter of the prefabricated canopy column 1 and is determined by the relevant diameter. The gap between the steel pipe 6 and the reserved slot hole 14 is filled with ultra-high performance concrete UHPC 15. The shear nail 8 is arranged on both sides of the steel pipe 6 and is evenly distributed along the outer wall of the steel pipe 6. The reserved slot hole 14 is provided with the corrugated steel wall 9 on the inner wall. In addition, the interior of the prefabricated canopy column 1 around the reserved slot hole 14 is further provided with the canopy column construction longitudinal reinforcement 11 and the canopy column construction stirrup 10. The canopy column construction longitudinal reinforcement 11 and the canopy column construction stirrup 10 constrain and position the joint in the interior of the prefabricated canopy column 1. The steel mesh 7 is arranged in the interior of the prefabricated canopy column 1 at the bottom of the reserved slot hole 14. The canopy column longitudinal reinforcement 4 is embedded in the interior of the prefabricated canopy column 1. The outer side of the canopy column longitudinal reinforcement 4 is provided with the canopy column stirrup 5. The canopy column longitudinal reinforcement 4 and the canopy column stirrup 5 are located outside the canopy column construction stirrup 10 and the canopy column construction longitudinal reinforcement 11. The interface between the prefabricated canopy column 1 and the prefabricated canopy beam 2 is provided with the tooth key 12. The prefabricated canopy column 1 is divided into two sections, including an upper prefabricated section canopy column and a lower prefabricated section canopy column. The upper prefabricated section canopy column and the lower prefabricated section canopy column are spliced into one by a grouting corrugated pipe connection mode. The upper prefabricated section canopy column is provided with the reserved corrugated pipe 16 at the bottom. The lower prefabricated section canopy column is provided with a foundation at the bottom. The canopy column longitudinal reinforcement 4 in the upper prefabricated section canopy column and the lower prefabricated section canopy column is inserted into the reserved corrugated pipe 16. The reserved corrugated pipe 16 is further filled with the ultra-high performance concrete UHPC 15, thereby splicing the upper prefabricated section canopy column and the lower prefabricated section canopy column into one.

[0040] In the embodiment, the compressive strength of the ultra-high performance concrete UHPC 15 is not less than 120 MPa, and the tensile strength is not less than 10 MPa.

[0041] Further, the steel mesh 7, the corrugated steel wall 9, the canopy column construction stirrup 10, the canopy column construction longitudinal reinforcement 11, the tooth key 12, and the reserved corrugated pipe 16 are arranged in the upper prefabricated section canopy column.

[0042] As Figure 6As shown, the installation method of the above railway platform prefabricated segment assembled canopy column-beam joint connection structure is as follows:

[0043] S1, in the factory, the longitudinal reinforcement 4 of the canopy column and the hoop reinforcement 5 are bound, the corrugated steel wall 9 is pre-buried at the top of the prefabricated segment canopy column, the reserved slot hole 14 is set and the steel pipe 6 is accurately positioned, the corrugated pipe 16 is reserved at the bottom, finally the formwork is supported, the concrete is poured, and the pouring of the prefabricated canopy column 1 is completed.

[0044] S2, in the factory, the steel pipe 6 is set, the shear nails 8 are reserved on both sides of the steel pipe 6, a plurality of welded steel bars 13 are welded in the inner wall of the steel pipe 6, the steel pipe 6 and the welded steel bars 13 in it are fixed in the prefabricated canopy beam 2 by the canopy beam structure steel bars, finally the formwork is supported, the concrete is poured, and the prefabricated canopy beam 2 is completed.

[0045] S3, the prefabricated canopy column 1 and the prefabricated canopy beam 2 are sent to the construction site, first, the upper prefabricated segment canopy column and the lower prefabricated segment canopy column are spliced into one, the longitudinal reinforcement 4 of the canopy column is inserted into the reserved corrugated pipe 16, and then the ultra-high performance concrete UHPC 15 is used for grouting.

[0046] S4, the tooth key 12 is arranged at the interface between the top of the upper prefabricated segment canopy column and the bottom of the prefabricated canopy beam 2, the joint, i.e. the steel pipe 6 and the steel pipe concrete 3 and the welded steel bars 13 in it extending out of the prefabricated canopy beam 2 are inserted into the reserved slot hole 14 at the top of the upper prefabricated segment canopy column, the levelness and perpendicularity of the structure are adjusted, the ultra-high performance concrete UHPC 15 is poured between the joint and the reserved slot hole 14, and the prefabricated canopy column 1 and the prefabricated canopy beam 2 are connected into one whole.

[0047] The above is only the preferred embodiment of the present application, and does not limit the structure of the present application in any form. The arrangement type and the number of use of the present application are not limited to the example, and can be optimized according to the engineering practice, any modification, equivalent change and decoration of the above embodiment according to the technical principle of the present application, which does not deviate from the technical scheme of the present application, are still within the scope of the technical scheme of the present application.

Claims

1. A prefabricated segmental assembly canopy column-beam joint connection structure for railway platforms, comprising prefabricated canopy columns (1) and prefabricated canopy beams (2), and connected into a whole by inserting pre-reserved steel pipe concrete (3) and welding steel bars (13), characterized in that: The precast canopy column (1) is composed of canopy column longitudinal reinforcement (4), canopy column stirrups (5), steel mesh (7), corrugated steel wall (9), canopy column structural stirrups (10), canopy column structural longitudinal reinforcement (11), toothed key (12), and reserved corrugated pipe (16); the precast canopy beam (2) is composed of steel pipe (6), shear nail (8), steel pipe concrete (3), toothed key (12), and welded steel reinforcement (13); The welded reinforcing bars (13) are anchored inside the precast canopy beam (2) and are uniformly welded along the inner wall of the steel pipe (6). Steel pipe concrete (3) is then poured inside the steel pipe (6). The steel pipe (6), steel pipe concrete (3), and welded reinforcing bars (13) extend downward along the bottom of the precast canopy beam (2) to form a joint. The joint extends downward and is inserted into the reserved slot (14) of the precast canopy column (1). Ultra-high performance concrete (UHPC) is poured in the gap between the steel pipe (6) and the reserved slot (14). (15); Shear nails (8) are provided on both sides of the steel pipe (6) and are evenly distributed along the outer wall of the steel pipe (6); Corrugated steel wall (9) is provided on the inner wall of the reserved slot (14); In addition, the precast canopy column (1) around the reserved slot (14) is also provided with canopy column structural longitudinal reinforcement (11) and canopy column structural stirrup (10), the canopy column structural longitudinal reinforcement (11) and canopy column structural stirrup (10) constrain and position the joint inside the precast canopy column (1); The precast canopy column (1) at the bottom of the reserved slot (14) is also provided with steel mesh (7); The longitudinal reinforcement (4) of the canopy column is embedded inside the precast canopy column (1), and the canopy column stirrup (5) is provided on its outer side. The longitudinal reinforcement (4) and the stirrup (5) of the canopy column are located outside the structural stirrup (10) and the structural longitudinal reinforcement (11) of the canopy column. The precast canopy column (1) is divided into two sections, including an upper precast segment canopy column and a lower precast segment canopy column. The upper precast segment canopy column and the lower precast segment canopy column are spliced ​​together by grouting corrugated pipe connection. A reserved corrugated pipe (16) is provided at the bottom of the upper precast segment canopy column. The longitudinal reinforcement (4) of the canopy column in the upper precast segment canopy column and the lower precast segment canopy column are all inserted into the reserved corrugated pipe (16), and ultra-high performance concrete (UHPC) is also pressed into the reserved corrugated pipe (16). (15) thereby splicing the upper prefabricated segmental canopy column and the lower prefabricated segmental canopy column into one piece.

2. The column-beam joint connection structure of the prefabricated segmental assembly canopy for railway platforms according to claim 1, characterized in that: At least 12 of the welded reinforcing bars (13) are uniformly welded along the inner wall of the steel pipe (6).

3. The column-beam joint connection structure of the prefabricated segmental assembly canopy for railway platforms according to claim 2, characterized in that: The welded steel bar (13) extends downward and is inserted into the reserved slot (14) to a depth of 1.5 times the diameter of the steel pipe (6); the diameter of the corrugated steel wall (9) is related to the diameter of the prefabricated canopy column (1).

4. The column-beam joint connection structure for prefabricated segmental assembly canopy of railway platform according to claim 1, characterized in that: The ultra-high performance concrete UHPC (15) has a compressive strength of not less than 120 MPa and a tensile strength of not less than 10 MPa.

5. The column-beam joint connection structure of the prefabricated segmental assembly canopy for railway platforms according to claim 1, characterized in that: The interfaces of the prefabricated canopy columns (1) and prefabricated canopy beams (2) are both set with toothed keys (12).

6. The column-beam joint connection structure of the prefabricated segmental assembly canopy for railway platforms according to claim 1, characterized in that: The lower prefabricated segmental canopy columns are provided with foundations at their bases.

7. The column-beam joint connection structure of the prefabricated segmental assembly canopy for railway platforms according to claim 1, characterized in that: The steel mesh (7), corrugated steel wall (9), canopy column structural stirrups (10), canopy column structural longitudinal reinforcement (11), toothed key (12), and reserved corrugated pipe (16) are all set inside the upper precast segment canopy column.

8. An installation method for the column-beam joint connection structure of a prefabricated segmental assembly canopy for railway platforms according to any one of claims 1-7, characterized in that, The specific installation steps are as follows: S1. Tie the longitudinal reinforcement (4) and stirrups (5) of the canopy column in the factory. Embed the corrugated steel wall (9) at the top of the upper precast segment canopy column, set the reserved slot (14) and accurately position the steel pipe (6), reserve the corrugated pipe (16) at the bottom, support the formwork, pour concrete, and complete the pouring of the precast canopy column (1). S2. Tie the structural steel bars of the canopy beam in the factory, set up steel pipe (6), reserve shear nails (8) on both sides of the steel pipe (6), weld multiple welded steel bars (13) to the inner wall of the steel pipe (6), fix it to the precast canopy beam (2), fix the steel pipe (6) and the welded steel bars (13) inside the precast canopy beam (2) with the structural steel bars of the canopy beam, finally support the formwork, pour concrete, and complete the production of the precast canopy beam (2); S3. Send the precast canopy column (1) and precast canopy beam (2) to the construction site. First, splice the upper precast segment canopy column and the lower precast segment canopy column into one piece. Insert the longitudinal reinforcement (4) of the canopy column into the reserved corrugated pipe (16) and then use ultra-high performance concrete UHPC (15) for grouting. S4. Set a toothed key (12) at the interface between the top of the upper precast segment canopy column and the bottom of the precast canopy beam (2). Insert the joint, i.e. the steel pipe (6) extending out of the precast canopy beam (2) and the steel pipe concrete (3) inside it, as well as the welded steel bar (13), into the reserved slot (14) at the top of the upper precast segment canopy column. Adjust the horizontality and verticality of the structure. Pour ultra-high performance concrete UHPC (15) between the joint and the reserved slot (14) to connect the precast canopy column (1) and the precast canopy beam (2) into a whole.

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