WO2021003903A1

WO2021003903A1 - Stepping-type multipoint incremental launching construction device and incremental launching construction method for steel box girder

Info

Publication number: WO2021003903A1
Application number: PCT/CN2019/115002
Authority: WO
Inventors: 张富生; 周斌; 白宾; 王绍义; 王兴阔; 张景伟; 王明月; 翟海明
Original assignee: 山东省路桥集团有限公司
Priority date: 2019-07-11
Filing date: 2019-11-01
Publication date: 2021-01-14
Also published as: CN110273383A

Abstract

Provided by the present invention is a stepping-type multipoint incremental launching construction device and an incremental launching construction method for a steel box girder, realizing uniform stress distribution of the steel box girder during an incremental launching process, avoiding concentrated stress and achieving a good incremental launching effect. The stepping-type multipoint incremental launching construction device for a steel box girder comprises: a plurality of temporary supports used for supporting the steel box girder; a longitudinal girder disposed on the temporary supports; a longitudinal movement guide rail disposed on the longitudinal girder; a sliding shoe, located below the steel box girder and on the longitudinal movement guide rail, and coordinating with the longitudinal movement guide rail to realize movement of the steel box girder relative to the longitudinal girder; and a longitudinal movement pushing mechanism, disposed from front to rear along the longitudinal girder, used for pushing the sliding shoe to move along the longitudinal movement guide rail, and comprising a pushing cylinder with a cylinder body connected to a longitudinal movement pushing block and a cylinder rod connected to the sliding shoe.

Description

Steel box beam walking type multi-point jacking construction device and jacking construction method

Technical field

The invention relates to a steel box girder stepping type multi-point pushing construction device and a pushing construction method, belonging to the technical field of steel structure bridge construction.

Background technique

Steel box girder is a commonly used structural form of long-span bridges and is generally used on bridges with larger spans. With the advantages of high strength, light structure, high degree of industrial production, easy repair, and recyclability, steel box girder has been more and more widely used.

The existing steel box girder installation methods include bracket installation, cantilever assembly and jacking installation. The steel box girder jacking method refers to the use of professional jacking equipment to self-assemble the steel box girder via temporary buttresses or longitudinal rails. The construction method of pushing to the installation position. This method is suitable for large span continuous bridges with constant cross section, especially for valleys with complex environments under the bridge and projects that require cross-line traffic.

In the prior art, the jacking construction device is generally a single-point force, that is, a large thrust cylinder is used to push the steel box girder forward at the rear end of the steel box girder, or a penetrating top is used to drag the steel box girder forward at the front end of the steel box girder; Both of these two methods have the problem of concentration, and as the length of the jacking steel box girder gradually increases, the weight gradually increases, and the pressure required for the jacking continues to increase. It may occur that the previously arranged oil cylinders cannot provide effective pressure. In this case, there is also the possibility of partial deformation and damage of the steel box girder due to excessive pressure.

Summary of the invention

The invention provides a steel box girder stepping type multi-point jacking construction device and a jacking construction method, so that the steel box girder is uniformly stressed during the jacking process, does not appear to be concentrated, and the jacking effect is good.

In order to achieve the above objectives, the present invention is achieved through the following technical solutions:

A steel box girder stepping type multi-point pushing construction device includes:

Multiple temporary supports for supporting steel box girder;

Longitudinal beam, set on temporary support;

Longitudinal guide rail, set on the longitudinal beam;

The sliding shoe is located under the steel box girder and on the longitudinal movement guide rail, and cooperates with the longitudinal movement guide rail to realize the movement of the steel box girder relative to the longitudinal beam; and

The longitudinal movement pushing mechanism is arranged forward and backward along the longitudinal beam, and is used for pushing the sliding shoe to move along the longitudinal movement guide rail. It includes a pushing cylinder, the end of the pushing cylinder is connected with the longitudinal pushing block, and the end of the pushing cylinder is connected with the sliding shoe.

On the basis of the steel box girder stepping multi-point pushing construction device, the longitudinally moving pushing block is a box structure, including an upper plate and two webs forming a U-shaped structure. The interior is divided into multiple cavities, and the bottom of the web is wedge-shaped, and the longitudinally moving The front end of the pushing block is provided with a pushing cylinder ear plate.

On the basis of the steel box girder stepping multi-point pushing construction device, the sliding shoe is a box structure including an upper cover plate, a lower bottom plate and two side plates. The upper cover plate is equipped with bolt holes bolted to the steel box girder. One end of the side plate is equipped with a pin hole connected with the pushing cylinder.

On the basis of the steel box girder stepping multi-point jacking construction device, the longitudinal movement guide rail includes a limit bar and a plurality of slideway tooth plates. The limit bar and the slideway tooth plate are both arranged on the upper surface of the longitudinal beam, and the slideway teeth The board is set outside the limit bar.

On the basis of the steel box girder stepping multi-point pushing construction device, the longitudinally moving pushing block and the slideway tooth plate are matched through an inclined plane.

A method for performing jacking construction using the steel box girder stepping multi-point jacking construction device includes the following steps:

S1. Pave longitudinal beams on temporary supports or other platforms, and install longitudinal guide rails, longitudinal push blocks, sliding shoes and push cylinders on the longitudinal beams;

S2. After the steel box girder is hoisted in place and connected with the sliding shoes, the jacking can be debugged;

S3. The push cylinder extends continuously for one stroke, and the push shoe slides forward for a certain distance;

S4. After one stroke of the cylinder is completed, the sliding shoe does not move; push the cylinder to shrink the cylinder, so that the longitudinal movement pushing block and the longitudinal movement guide rail are released, and follow the pushing cylinder to move forward;

S5. Push the cylinder to complete one stroke and shrink the cylinder, drag the longitudinal push block to move forward by one step, the push and slide of one stroke is completed, and the next stroke sequence is executed from step S3;

S6. After the steel box girder is pushed to the next station, the subsequent section of steel box girder is hoisted, and a longitudinal movement pushing mechanism is installed on the subsequent steel box girder section to make the overall force of the steel box girder uniform.

The working principle of the present invention: laying longitudinal beams and longitudinal moving guide rails on the temporary support, using the longitudinal pushing mechanism and the pushing cylinder to push the sliding shoe at the bottom of the steel box girder to drive the steel box girder to move longitudinally forward, and the overall longitudinal moving system is installed during work. Push the cylinder to extend and push the steel box girder forward, and then push the cylinder to contract, driving the longitudinal movement and pushing mechanism to slide forward to the next station, and you can continue to push the steel box girder forward. Two sets of pushing devices are installed at the lower end of each section of the steel box girder, so that the steel box girder is stressed at multiple points and the force is evenly distributed.

The advantages of the present invention are:

1. Steel box girder is evenly stressed: multi-point pushing is adopted, and the steel box girder is evenly stressed, and there will be no damage and deformation due to excessive local stress on the steel box girder;

2. High construction efficiency: Multi-point pusher is adopted, and each section of steel box girder is equipped with pusher devices, so that the steel box girder can move forward along the longitudinally moving guide rails stably, without the phenomenon of "rail gnawing" and "rail stuck" , Pushing smoothly and high efficiency;

3. There is no need to use large thrust cylinders: Since each section of steel box girder is equipped with a longitudinal displacement pushing mechanism, each longitudinal displacement pushing mechanism requires a small pushing force, so there is no need to use a large thrust cylinder.

4. Temporary support is stable in force: During construction, the force of this device on the temporary support is internal force, and there is no longitudinal thrust to the temporary support, which is beneficial to increase the stability of the temporary support.

Description of the drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, together with the embodiments of the present invention, are used to explain the present invention, and do not constitute a limitation to the present invention.

Figure 1 is a schematic diagram of the structure of the sliding shoe of the present invention;

Fig. 2 is a schematic diagram of the structure of the longitudinal movement pushing block of the present invention;

Figure 3 is a schematic diagram of the longitudinal beam and the longitudinal movement track of the present invention;

Figure 4 is a schematic diagram of the overall structure of the present invention;

Figure 5 is a schematic diagram of the structure of the pushing cylinder, sliding shoe and longitudinally moving pushing block of the present invention;

6 is a schematic diagram of the state of the pushing cylinder and the sliding shoe and the longitudinally moving pushing block in step S3;

Figure 7 is a schematic diagram of the state of the pushing cylinder and the sliding shoe and the longitudinally moving pushing block in step S4;

8 is a schematic diagram of the state of the pushing cylinder and the sliding shoe and the longitudinally moving pushing block in step S5;

Figure 9 is a schematic diagram of a subsequent section of steel box girder after being pushed to the next station.

Among them, 1. Two inclined rods; 2. Vertical rod; 3. First inclined rod; 4. Screw rod; 5. Screw nut; 6. Roller frame; 7. Pin shaft; 8. Roller; 9. Pushing longitudinal beam ; 10. Pushing cylinder; 11. Limit mounting seat; I. Frame body; II. Pushing mechanism; III. Adjustable guide wheel; 6-1. Upper plate; 6-2. Lower plate; 6-3. Install the board.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

Referring to Figure 4, a steel box girder stepping multi-point pushing construction device includes a longitudinal beam 3, a longitudinal movement guide 4, a sliding shoe 1, a longitudinal movement pushing mechanism, and a plurality of temporary supports 6, which are used to align the steel box Beam support, the longitudinal beam 3 is set on the temporary support 6, the longitudinal movement guide 4 is arranged on the longitudinal beam 3, the sliding shoe 1 is located under the steel box beam and on the longitudinal movement guide 4, and can be realized by cooperating with the longitudinal movement guide 4 The steel box girder moves relative to the longitudinal beam 3; the longitudinal pushing mechanism is arranged front and rear along the longitudinal beam 3, and is used to push the sliding shoe 1 to move along the longitudinal guide rail 4, including a pushing cylinder 5, the cylinder end of the pushing cylinder 5 is connected to the longitudinal pushing block 2 , The rod end of the pushing cylinder 5 is connected to the sliding shoe 1.

Referring to Figure 1, the shoe 1 is a box structure, including an upper cover 101, a lower bottom plate 105 and two side plates 103. The upper cover 101 is equipped with bolt holes 102 bolted to the steel box girder, and one end of the side plate 103 is equipped with There is a pin hole 104 connected with the pushing cylinder 5.

Referring to Figure 2, the longitudinally moving and pushing block 2 is a box structure, including an upper plate 201 and two webs 203 to form a U-shaped structure. The bottom of the web is wedge-shaped. The inside of the moving and pushing block 2 is divided into multiple cavities 203, and the moving and pushing block 2 There is a sliding groove 204 matched with the longitudinal movement guide rail 4, and the front end of the longitudinal movement pushing block 2 is provided with a pushing cylinder lug 205.

Referring to Fig. 3, the longitudinal movement guide 4 includes a limit bar 4-2 and a plurality of slideway tooth plates 4-1. The limit bar 4-2 and the slideway tooth plate 4-1 are both arranged on the upper surface of the longitudinal beam 3, and The slideway tooth plate 4-1 is arranged outside the limit bar 4-2.

In this embodiment, the longitudinally moving pushing block 2 and the slideway tooth plate 4-1 are matched by an inclined surface.

S1. Pave the longitudinal beam 3 on the temporary support or other platform, and install the longitudinal guide rail 4, the longitudinal pushing block 2, the sliding shoe 1 and the pushing cylinder 5 on the longitudinal beam 3 in sequence;

S2. After the steel box girder is hoisted in place and connected to the sliding shoe 1, the jacking can be debugged;

S3. Referring to Figure 6, the pushing cylinder 5 continuously extends for one stroke, and the pushing shoe 1 slides forward for a certain distance;

S4. Referring to Figure 7, one stroke of the cylinder is completed, and the sliding shoe 1 does not move; the push cylinder 5 shrinks the cylinder, so that the longitudinal push block 2 and the longitudinal guide 4 are released, and follow the push cylinder 5 to move forward;

S5. Referring to Figure 8, one stroke of the push cylinder 5 is completed, the vertical movement push block 2 is dragged to move forward by one step, the pushing and sliding of one stroke is completed, and the next stroke sequence is executed from step S3 ；

S6. Refer to Figure 9, after the steel box girder is pushed to the next station, the subsequent section of steel box girder is hoisted, and a longitudinal movement pushing mechanism is installed on the subsequent steel box girder section to make the overall force of the steel box girder uniform.

Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it is still for those skilled in the art. The technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

A steel box beam walking type multi-point pusher construction device, which is characterized in that it comprises:

Multiple temporary supports (6) for supporting steel box girder;

The longitudinal beam (3) is set on the temporary support (6);

Longitudinal guide rail (4), set on the longitudinal beam (3);

The sliding shoe (1) is located below the steel box girder and on the longitudinal guide rail (4), and cooperates with the longitudinal guide rail (4) to realize the movement of the steel box girder relative to the longitudinal beam (3); and

Longitudinal movement and pushing mechanism, arranged front and back along the longitudinal beam (3), used to push the sliding shoe (1) to move along the longitudinal movement guide rail (4), including the pushing cylinder (5), the pushing cylinder (5) is connected to the cylinder body end to be pushed The block (2) pushes the cylinder (5) and the cylinder rod end is connected to the sliding shoe (1).
The steel box girder stepping multi-point pushing construction device according to claim 1, characterized in that: the longitudinally moving pushing block (2) is a box structure, including an upper plate and two webs forming a U-shaped structure, and the interior is divided into multiple cavities , The bottom of the web is wedge-shaped, and the front end of the longitudinally moving pushing block (2) is provided with a pushing cylinder lug plate.
The steel box girder stepping multi-point pushing construction device according to claim 1, characterized in that the sliding shoe (1) is a box structure, including an upper cover plate, a lower bottom plate and two side plates, and the upper cover plate is equipped with A bolt hole for bolting the steel box girder, one end of the side plate is provided with a pin shaft hole connected with a pushing cylinder (5).
The stepping multi-point pushing construction device for steel box girder according to claim 1, characterized in that: the longitudinally moving guide rail (4) includes a limit bar (4-2) and a plurality of slideway tooth plates (4-1). The position bar (4-2) and the slide rail tooth plate (4-1) are both arranged on the upper surface of the longitudinal beam (3), and the slide rail tooth plate (4-1) is arranged on the outer side of the limit bar (4-2).
The steel box girder stepping multi-point pushing construction device according to claim 4, characterized in that: the longitudinally moving pushing block (2) and the slideway tooth plate (4-1) are matched by an inclined plane.
A method for performing jacking construction using the stepping multi-point jacking construction device for steel box girder according to any one of claims 1 to 5, characterized in that it comprises the following steps:

S1. Pave the longitudinal beams (3) on temporary supports or other platforms, and install longitudinal guides (4), longitudinal push blocks (2), sliding shoes (1) and push cylinders (5) on the longitudinal beams (3) in sequence ；

S2. After the steel box girder is hoisted in place and connected to the sliding shoe (1), the jacking can be debugged;

S3. The pushing cylinder (5) continuously extends the cylinder for one stroke, and the pushing shoe (1) slides forward for a certain distance;

S4. After one stroke of the cylinder is completed, the sliding shoe (1) does not move; the push cylinder (5) shrinks the cylinder, so that the longitudinal push block (2) and the longitudinal guide (4) are released, and follow the push cylinder (5) in the direction Move forward

S5. Push the cylinder (5) to complete one stroke and shrink the cylinder, drag the longitudinal push block (2) to move forward by one step, the push and slide of one stroke is completed, and the next stroke sequence is executed from step S3 ；

S6. After the steel box girder is pushed to the next station, the subsequent section of steel box girder is hoisted, and a longitudinal movement and pushing mechanism is installed on the subsequent steel box girder section to make the overall force of the steel box girder uniform.