A composite material emergency repair pier structure form and its rapid erection method

Abstract

The present invention provides a composite material emergency repair pier structure, which includes a capping beam arranged at the top, a herringbone column for supporting the capping beam, a group of horizontal supports, and a group of diagonal bars; the herringbone column is spliced by a group of standard splicing segments; adjacent standard splicing segments are connected by a sleeve with prestressed teeth connection, and an ear flange is arranged outside the sleeve; a group of horizontal supports are horizontally arranged inside the herringbone column, and a group of diagonal bars are obliquely arranged inside the herringbone column, and ear flanges are arranged at the ends of both the horizontal supports and the diagonal bars. The present invention also provides a rapid erection method for the above-mentioned emergency repair pier. The emergency repair pier structure provided by the present invention is simple. The structure form is a lightweight structure form realized by combining composite material pipes with prestressed tooth connection technology and metal material nodes such as aluminum alloy, which is convenient for transportation and installation; at the same time, the emergency repair pier is assembled with standard modules, the assembly is rapid, the erection period is short, and it can effectively meet the requirements of rapid emergency repair for disaster relief.

Description

Technical Field

[0001] The present invention relates to a composite material for repairing bridge piers and a rapid erection method thereof, belonging to the technical field of bridge engineering. Background Art

[0002] Judging from the publicly available information, there are few dedicated equipment developed abroad for repairing bridge piers. The domestic bridge repair piers can generally be divided into two categories: railway repair piers and highway repair piers. The railway repair pier equipment mainly includes the 83-type railway military bridge piers (5 - 10m) and the 65-type railway military bridge piers (10 - 40m), and there are also a small number of railway repair high piers (over 70m). The highway repair piers mainly include assembled highway steel bridge piers and temporary piers assembled using assembled highway steel bridge truss sheets (321 or ZB-200 type). In addition, there are also steel pipe temporary piers. Thus, in terms of the research and development and use of the repair pier standard equipment, the domestic mainly focuses on railway bridge repair piers. There are only two types of equipment for highway bridge repair piers, and the maximum adaptable height is 30 meters, which can no longer meet the repair requirements of a large number of high-pier highway bridges; and the existing repair piers are all made of steel structures. The main problems are that the types and quantities of components are numerous and the weight is large. The assembly and erection period increases non-linearly with the increase of pier height. Generally, the erection of piers within 20 meters can be controlled within several hours, but the erection time of high piers over 50 meters is counted in days, making it difficult to fully meet the requirements of rapid repair for disaster relief. The repair piers mainly adopt the erection method of component hoisting by derricks or cranes and manual assembly at high altitudes. Only the railway repair high piers adopt the method of component assembly by manual at the bottom and the overall hydraulic jacking of the bridge pier for erection. The erection process is complex and the erection period is long.

[0003] In summary, the existing repair bridge piers basically have the disadvantages of numerous types and quantities of steel components and large weight, resulting in a long assembly and erection period, and thus it is difficult to fully meet the requirements of rapid repair for disaster relief. Summary of the Invention

[0004] Object of the Invention: The object of the present invention is to provide a repair bridge pier with a simple structure form and light weight and a rapid erection method thereof.

[0005] Technical solution: The present invention provides a composite material emergency repair pier structure, namely an emergency repair pier with a simple and lightweight structure, including a capping beam arranged at the top, a herringbone column for supporting the capping beam, a group of horizontal supports, and a group of diagonal bars; the herringbone column is spliced by a group of standard assembled segments; adjacent standard assembled segments are connected by a sleeve with prestressed teeth connection, and an ear flange is arranged outside the sleeve; the group of horizontal supports are horizontally arranged inside the herringbone column, and the group of diagonal bars are obliquely arranged inside the herringbone column. Ear flanges are arranged at the ends of the horizontal supports and the ends of the diagonal bars; the ear flange arranged outside the sleeve is bolted to the ear flanges arranged at the ends of the horizontal supports and the ends of the diagonal bars; the standard assembled segments, horizontal supports, and diagonal bars are all FRP pipes.

[0006] As an improvement, the capping beam is connected to the standard assembled segment at the top of the herringbone column through a variable cross-section connecting device.

[0007] As another improvement, the capping beam and / or the variable cross-section connecting device are respectively and independently a metal capping beam, preferably an aluminum alloy capping beam; the cross-section of the capping beam is rectangular.

[0008] As another improvement, the standard assembled segment at the bottom of the herringbone column is hinged to the channel steel arranged on the ground; the length of the standard assembled segment is 2 - 3m.

[0009] The present invention also provides a rapid erection method for the above-mentioned emergency repair pier, including the following steps:

[0010] (1) First, set up a working frame at the erection site. The working frame is a two-layer frame structure;

[0011] (2) On the working frame, use a manual hoist to lift the capping beam to the top of the working frame; install two assembled standard assembled segments at the bottom of the capping beam; at the same time, anchor one end of the stabilizing cable at the center of the side of the capping beam, and the other end at the ground anchor device; tension the stabilizing cable and monitor the column top displacement and cable force in real time;

[0012] (3) On the top platform of the working frame, use a lifting device to lift the partially installed emergency repair pier so that the standard assembled segment at the bottom reaches the predetermined height; during the lifting process, the stabilizing cable slides slowly with the lifting; use a limiting device to limit the herringbone frame of the partially installed emergency repair pier on the working frame, and at the same time continue to assemble standard assembled segments at the bottom of the partially installed emergency repair pier;

[0013] (4) Repeat step (3) until all standard assembled segments are assembled;

[0014] (5) The standard assembled segment at the bottom of the herringbone column is hinged to the ground support channel steel.

[0015] In step (1), the working frame is a steel working frame.

[0016] In step (2), the stabilizing cable is a BFRP flat cable, which realizes real-time monitoring and adjustment of the cable force and adjustment of the column top displacement during the jacking process, and ensures the structural stability during the jacking process of the pier column under the action of wind load and the like.

[0017] In step (3), the lifting device is a through-hole jack, a manual or electric hoist.

[0018] In step (3), during each lifting process of the standard assembled segment, its horizontal displacement is: ; where l is the length of each standard assembled segment, and is the angle between the standard assembled segment and the horizontal plane.

[0019] In step (3), the sliding and locking control system of the stabilizing cable is realized through an anchor card device and a sensing control device; the anchor card device is composed of a pulley block. When the brake wheel of the pulley block is released, the cable can slide slowly along with the jacking of the pier column; when the brake wheel of the pulley block is locked, the friction force between the pulley and the cable can provide an effective anchoring force; the sensing control device is a length meter. When the displacement difference of the stabilizing cable is greater than a certain threshold value, the pulley block is automatically locked.

[0020] Beneficial effects: The structural form of the emergency repair pier provided by the present invention is simple. The structural form is a light structural form realized by combining a composite material pipe with a prestressed tooth connection technology and metal material nodes such as aluminum alloy, which is convenient for transportation and installation; at the same time, the emergency repair pier adopts standard module assembly, with rapid assembly, short erection period, and can effectively meet the requirements of rapid emergency repair and disaster relief. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the emergency repair pier of the present invention;

[0022] Figure 2 is the front view of the emergency repair pier of the present invention;

[0023] Figure 3 is the left view of the emergency repair pier of the present invention;

[0024] Figure 4 is a schematic diagram of two standard assembled segments of the emergency repair pier of the present invention connected by a flange;

[0025] Figure 5 is a schematic diagram of the hinge connection between the last standard assembled segment of the emergency repair pier of the present invention and the ground support;

[0026] Figure 6 is a schematic structural diagram of the working frame;

[0027] Figure 7 is a schematic diagram of the capping beam installation during the erection construction process of the emergency repair pier;

[0028] Figure 8 Schematic diagram of the lifting device during the erection construction of the emergency repair pier

[0029] Figure 9 Schematic diagram of the limit and the assembly of the next standard section during the erection construction of the emergency repair pier Specific embodiments

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] An emergency repair pier with a simple and lightweight structure is shown in Figures 1 to 5 , including a capping beam 1 provided at the top, a herringbone column 2 for supporting the capping beam 1, a group of horizontal supports 3, and a group of diagonal bars 4; the herringbone column 2 is spliced by a group of standard assembled sections 9; adjacent standard assembled sections 9 are connected by a sleeve 10 with prestressed teeth connection, and an ear flange 12 is arranged outside the sleeve 10; a group of horizontal supports 3 are horizontally arranged inside the herringbone column 2, and a group of diagonal bars 4 are obliquely arranged inside the herringbone column 2, and ear flanges 12 are arranged at the ends of the horizontal supports 3 and the diagonal bars 4; the ear flange 12 arranged outside the sleeve 10 is bolted to the ear flanges 12 arranged at the ends of the horizontal supports 3 and the diagonal bars 4; the standard assembled section 9, the horizontal support 3, and the diagonal bar 4 are all FRP pipes.

[0032] The capping beam 1 is connected to the standard assembled section at the top of the herringbone column 2 through a variable cross-section connecting device.

[0033] The capping beam 1 and / or the variable cross-section connecting device are respectively independently a metal capping beam, preferably an aluminum alloy capping beam; the cross-section of the capping beam is rectangular.

[0034] The standard assembled section at the bottom of the herringbone column 2 is hinged to the channel steel arranged on the ground; the length of the standard assembled section 9 is 2 - 3m.

[0035] The rapid erection method of the above-mentioned emergency repair pier is shown in Figures 6 to 9 , including the following steps:

[0036] S1: First, a working frame 5 is erected at the erection site. The working frame 5 is a two-layer frame structure and is a steel working frame, as shown in Figure 6 ;

[0037] S2: On the working frame 5, the capping beam 1 is lifted to the top of the working frame 5 by a manual hoist; two assembled standard assembled sections 9 are installed at the bottom of the capping beam 1; at the same time, one end of the stabilizing cable 14 is anchored at the center of the side of the capping beam 1, and the other end is anchored on the ground anchor device 15; the stabilizing cable 14 is tensioned, and the column top displacement and the cable force are monitored in real time; the stabilizing cable 14 is a BFRP flat cable, which realizes the real-time monitoring and adjustment of the cable force and the adjustment of the column top displacement during the jacking process, and ensures the structural stability during the jacking process of the pier column under the action of wind load, etc.; as shown in Figure 7 ;

[0038] S3: On the top platform of the working frame 5, the partially installed emergency bridge pier is lifted by the lifting device 6 so that the standard assembly segment 9 at the bottom is at a predetermined height; during the lifting process, the stabilizing rope 14 slides slowly with the lifting; the limiting device 8 is used to limit the herringbone frame of the partially installed emergency bridge pier on the working frame 5, and at the same time, the standard assembly segment 9 is continued to be assembled at the bottom of the partially installed emergency bridge pier; the lifting device 6 is a through-type jack, a manual or electric hoist;

[0039] During each lifting process of the standard assembly segment 9, its horizontal displacement is: ;in, l is the length of each standard assembly segment, is the angle between the standard assembly segment and the horizontal plane;

[0040] The sliding and locking control system of the stabilizing cable 14 is realized by an anchoring device and a sensor control device; the anchoring device is composed of a pulley block, and when the brake wheel of the pulley block is released, the cable can slide slowly with the pier column jacking; when the brake wheel of the pulley block is locked, the friction between the pulley and the cable can provide effective anchoring force; the sensor control device is a meter, and when the displacement difference of the stabilizing cable is greater than a certain threshold, the pulley block is automatically locked; see Figure 8 and 9 ;

[0041] S4: Repeat S3 until all standard assembly segments are assembled;

[0042] S5: The standard assembly section at the bottom of the herringbone column is hinged to the ground support 13 channel steel.

Claims

1. A rapid erection method for repairing bridge piers. Features: The following steps are involved: (1) First, set up a work frame at the erection site. The work frame is a two-layer frame structure; (2) On the work frame, lift the cap beam to the top of the work frame by a manual hoist; install the two assembled standard assembly segments at the bottom of the cap beam; at the same time, anchor one end of the stabilizing cable to the center of the side of the cap beam, and the other end to the ground anchor device; tension the stabilizing cable, and monitor the column top displacement and cable force in real time; (3) On the top platform of the work frame, use the lifting device to lift the partially installed emergency repair pier so that the standard assembly segment at the bottom reaches the predetermined height; During the lifting process, the stabilizing rope slides slowly with the lifting; the limiting device is used to limit the herringbone frame of the partially installed emergency repair pier on the working frame, and at the same time, the standard assembly segments continue to be assembled at the bottom of the partially installed emergency repair pier; (4) Repeat step (3) until all standard assembly segments are assembled; (5) The standard assembly section at the bottom of the herringbone column is hinged to the ground support channel steel; The structure of a bridge pier comprises a cap beam (1) arranged at the top, a herringbone column (2) for supporting the cap beam (1), a group of horizontal supports (3), and a group of diagonal rods (4); the herringbone column (2) is formed by splicing a group of standard assembled segments (9); adjacent standard assembled segments (9) are connected by using a sleeve (10) with a prestressed tooth connection, and an ear flange (12) is arranged outside the sleeve (10); the group of horizontal supports (3) is horizontally arranged inside the herringbone column (2), and a group of diagonal rods (4) is obliquely arranged inside the herringbone column (2), and the ends of the horizontal supports (3) and the ends of the diagonal rods (4) are both provided with ear flanges (12); the sleeve (10) is provided with an ear flange (12) outside the sleeve (10); The ear flange (12) is connected to the ear flange (12) provided at the end of the horizontal support (3) and the end of the diagonal rod (4) by bolts; the standard assembly segment (9), the horizontal support (3) and the diagonal rod (4) are all FRP tubes; the cap beam (1) and the standard assembly segment at the top of the herringbone column (2) are connected by a variable cross-section connection device; the cap beam (1) and / or the variable cross-section connection device are each independently a metal cap beam; the cross-section of the cap beam is rectangular; the standard assembly segment at the bottom of the herringbone column (2) is hinged to a channel steel provided on the ground; the length of the standard assembly segment (9) is 2 to 3 m.

2. The rapid erection method for repairing bridge piers according to claim 1, Features: In step (1), the work frame is a steel work frame.

3. The rapid erection method for repairing bridge piers according to claim 1, Features: In step (2), the stabilizing cable is a BFRP flat strip cable, which can realize real-time monitoring and adjustment of the cable force and adjustment of the column top displacement during the jacking process, thereby ensuring the structural stability of the pier column during the jacking process under the action of wind load.

4. The rapid erection method for repairing bridge piers according to claim 1, Features: In step (3), the lifting device is a through-type jack, a manual or electric hoist.

5. The rapid erection method for repairing bridge piers according to claim 1, Features: In step (3), during each lifting process of the standard assembled segment, its horizontal displacement is: ; where is the length of each standard assembled segment, and is the angle between the standard assembled segment and the horizontal plane.

6. The rapid erection method for emergency repair of bridge piers according to claim 1, characterized in that: In step (3), the sliding and locking control system of the stabilizing cable is realized through an anchor clamping device and a sensing control device; the anchor clamping device is composed of a pulley block. When the brake wheel of the pulley block is released, the cable can slide slowly along with the jacking of the pier column; when the brake wheel of the pulley block is locked, the friction force between the pulley and the cable can provide an effective anchoring force; the sensing control device is a length counter. When the displacement difference of the stabilizing cable is greater than a certain threshold value, the pulley block is automatically locked.

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