CN218989877U

CN218989877U - Double-slider pushing construction structure of large-span steel truss bridge

Info

Publication number: CN218989877U
Application number: CN202222792717.7U
Authority: CN
Inventors: 周继亮; 邓海涛; 廖勇; 张细敏; 赵登平; 鲜谊; 李军兵; 吕俊; 廖波; 王超; 刘日飞; 李扭坤; 魏涛涛; 陈艺莲
Original assignee: China Railway No 2 Engineering Group Co Ltd; China Railway Erju 2nd Engineering Co Ltd
Current assignee: China Railway No 2 Engineering Group Co Ltd; China Railway Erju 2nd Engineering Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-05-09
Anticipated expiration: 2032-10-21

Abstract

The utility model provides a double-slider pushing construction structure of a large-span steel truss bridge, which is formed by splicing a plurality of sectional girder bodies, and comprises a first steel truss girder and a second steel truss girder, wherein a pier is arranged below the large-span steel truss girder, and the large-span steel truss girder is connected with the pier through a slideway girder and a slider, and is characterized in that: the sliding block comprises a sliding block main body, wherein the sliding block main body is of a three-dimensional hollow structure, a plurality of inner reinforcing rib plates are arranged in an inner cavity of the sliding block main body at intervals, and the middle part of the bottom surface of the sliding block main body is connected with an MGB sliding plate through a connecting piece. Compared with the prior art, the double-slider construction structure provided by the utility model can reduce unbalanced bending moment caused to the lower structure of the main body in the pushing process of the steel truss girder body, the main slider and the auxiliary slider are stressed simultaneously during construction and are positioned at two sides of the bridge pier, and the supporting reaction moment can balance a part, so that the stress characteristics of the bridge pier and the slideway girder are fully exerted, and the construction safety is ensured.

Description

Double-slider pushing construction structure of large-span steel truss bridge

Technical Field

The utility model relates to the technical field of bridge building construction, in particular to a double-slider pushing construction structure of a large-span steel truss bridge.

Background

The pushing method construction of bridge, etc. adopts special pushing power device to push the beam body to move on special supporting facilities and sliding devices, and finally pushes the beam body to the position designed to be erected, the pushing method construction has the following maximum advantages compared with the traditional construction method: the construction of the approach bridge on the shore is finished and can be performed as a pushing platform, the pushing erection process can not influence the navigation of the river, and the large-scale hoisting bridge erecting equipment is not needed, so that the method is particularly suitable for occasions where the large-scale hoisting equipment cannot be subjected to the parking construction or the large-scale floating crane construction.

In the multi-point synchronous dragging construction of the long-span steel truss girder, the steel truss girder body is formed by splicing a plurality of sectional girders, the counter force of the supporting point is increased along with the enlargement of the cantilever when the steel truss girder is pushed onto the temporary pier, in order to ensure that the stress of concrete is not more than the allowable tensile stress when a pile foundation is pulled, a double-slider pushing mode is adopted on a slideway girder, and the unbalanced bending moment on a main body lower structure can be reduced.

The problem of unbalanced moment can be reduced to two slider structures, but because the slider structure that adopts at present is solid cubic structure more, and self dead weight is great, and the slip is carried out the burden greatly, simultaneously, discovers at the in-process of pushing the slider, and current slider is not stable enough in the slip in-process, and the steel truss body produces certain horizontal skew easily, and in addition, because the steel truss body is a plurality of segmentation roof beams concatenation constitution generally, the slider should be located the concatenation department of segmentation roof beam and just can realize better pushing effect, but current slider structure is difficult to solve above-mentioned problem, remains to be improved.

Disclosure of Invention

The utility model aims to provide a double-slider pushing construction structure of a large-span steel truss bridge, which solves the problems that the existing double-slider structure is not stable enough when sliding pushing, a steel truss body is easy to generate certain transverse offset and the like.

The embodiment of the utility model is realized by the following technical scheme:

the utility model provides a two slider pushes away construction structures of long-span steel truss bridge, long-span steel truss body is by a plurality of segmentation roof beam body concatenation constitution, including steel truss first and steel truss second, the below of long-span steel truss body is provided with the pier, long-span steel truss body with link to each other through slide roof beam and slider between the pier, its characterized in that: at least two sliding blocks are arranged;

the sliding block comprises a sliding block main body, the sliding block main body is of a three-dimensional hollow structure, a plurality of inner reinforcing rib plates are arranged in an inner cavity of the sliding block main body at intervals, the middle part of the bottom surface of the sliding block main body is connected with an MGB sliding plate through a connecting piece, and two sides of the sliding block main body are provided with limiting centering plates.

Further, the connecting piece is a countersunk bolt.

Further, the inner reinforcing rib plates are arranged at intervals along the normal direction.

Further, the limiting centering plates are of a rectangular structure extending downwards, and the two limiting centering plates are respectively located on two sides of the slideway beam.

Further, a rear anchor reinforcing plate is connected between the plurality of inner reinforcing plates.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

compared with the prior art, the double-slider construction structure provided by the utility model can reduce unbalanced bending moment caused to the lower structure of the main body in the pushing process of the steel truss body, and the structure of the slider is redesigned, so that the stress is more stable and reliable, the sliding is more natural, the construction safety is ensured, and the popularization and the use are facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a side view of the present utility model applied in a steel truss bridge pushing process;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a vertical cross-sectional view of a master slider and a slave slider in the present utility model;

FIG. 4 is a transverse cross-sectional view of a master slider and a slave slider in accordance with the present utility model.

Icon: 1. a first steel truss girder; 2. a steel truss girder II; 3. bridge piers; 4. temporary piers; 5. a slide block; 51. a slider body; 52. an inner reinforcing plate; 53. MGB skateboard; 54. a connecting piece; 55. limiting the centering plate; 56. and a rear anchor reinforcing plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiment one:

as shown in fig. 1, the large-span steel truss bridge double-slider pushing construction structure is formed by splicing a plurality of sectional girder bodies, and comprises a first steel truss girder body 1 and a second steel truss girder body 2, when the length of the large-span steel truss girder body is larger, the large-span steel truss girder bridge can be further subdivided into more smaller sectional girder bodies, a plurality of bridge piers 3 are arranged below the large-span steel truss girder body, temporary piers 4 are arranged along the linear arrangement direction of the plurality of bridge piers 3, the large-span steel truss girder body is connected with the bridge piers 3 through slideway girders and sliders 5, at least two sliders 5 drive the large-span steel truss girder body to slide towards the temporary piers 4 through pushing the sliders 5 until the large-span steel truss girder body is connected with the top ends of the temporary piers 4, and the purpose of supporting the large-span steel truss girder body is achieved.

Compared with the prior art, the double-slider construction structure provided by the utility model can reduce unbalanced bending moment caused to the lower structure of the main body in the pushing process of the long-span steel truss body, two sliders 5 are stressed simultaneously during construction and are respectively positioned at two sides of the bridge pier 3, and the supporting reaction moment can balance a part, so that the stress characteristics of the bridge pier 3 and the slideway beam are fully exerted, and the construction safety is ensured.

As shown in fig. 2 and 3, the sliding block 5 includes a sliding block main body 51, the sliding block main body 51 is of a three-dimensional hollow structure, a plurality of internal reinforcing rib plates 52 are arranged in an inner cavity of the sliding block main body at intervals, and the plurality of internal reinforcing rib plates 52 are arranged at intervals along a normal direction, so that the overall strength of the sliding block 5 is enhanced on the premise of excessively increasing the weight of the sliding block main body 51, and the stability and reliability during sliding are ensured.

In this embodiment, the top and bottom ends of the inner reinforcing plate 52 are connected to the slider body 51 by wire bonding or welding.

The middle part of the bottom surface of the slider main body 51 is connected with an MGB sliding plate 53 through a connecting piece 54, the connecting piece 54 is a countersunk bolt in the embodiment, the friction coefficient between the MGB sliding plate 53 and a stainless steel plate at the top of the slideway beam is 0.1, the sliding is smooth, and the efficiency is improved.

The two sides of the bottom surface of the slider main body 51 are welded with a spacing centering plate 55, in this embodiment, the spacing centering plate 55 is of a downward extending rectangular structure, the two spacing centering plates 55 are respectively located at two sides of the slideway beam, the spacing centering plate 55 is used for limiting the transverse sliding of the large-span steel truss body when the large-span steel truss body is transversely shifted under the action of transverse force generated by various factors in the sliding process of the slider 5 along the slideway beam, so that the transverse shifting of the girder body is avoided to be overlarge, and the construction safety is ensured.

In this embodiment, the limiting centering plate 55 may also be connected to the slider body 51 by a bolting method.

The rear anchor reinforcing plates 56 are welded or screwed between the plurality of inner reinforcing rib plates 52, and the rear anchor reinforcing plates 56 can prevent the sliding blocks 5 from being damaged due to insufficient anchoring strength in the dragging process, so that the force transmission effect is improved.

According to the technical scheme, a cantilever splicing method is adopted in the whole splicing process of the large-span steel truss girder body, the sliding blocks 5 on two sides are moved to the beam joints of the adjacent sectional girders before pushing according to the upper-section technical scheme, the reaction force moment is balanced, in reality, only one sliding block 5 is possibly positioned at the beam joints of the adjacent sectional girders due to the limitation of the length of the slideway girders, as in the figure, the sliding block 5 on the right side of the slideway girders is positioned at the beam joint between the first steel truss girder body 1 and the second steel truss girder body 2, the top end of the sliding block 5 on the left side of the slideway girders is attached to the bottom end of the first steel truss girder body 1, the large-span steel truss girder body is subsequently moved through the moving sliding blocks 5, after the sliding blocks 5 are moved to the large distance on the slideway girders, the large-span steel truss girder body is jacked up and moved to the initial position by adopting a jack system, and then the steps are repeated until the large-span steel truss girder body is erected at the top end of the temporary pier 4, and in the process, the stable reaction force moment of the large-span steel truss girder body is ensured.

Embodiment two:

the present double slider pushing structure is basically the same as the first embodiment, except that the slider body 51 is an inverted trapezoidal structure or a wedge-shaped structure with a wide upper portion and a narrow lower portion.

Embodiment III:

the double-slider pushing structure is basically the same as the first embodiment, and is different in that the structural construction part is positioned in the middle of the bridge pier 3, and only one slider 5 is adopted for pushing construction; when the center stress moment of the bridge pier 3 is larger after the sliding block 5 moves, the second sliding block 5 is adopted for auxiliary construction, namely, a double-sliding block system construction is adopted, and the construction condition can be flexibly selected.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a two slider pushes away construction structures of large-span steel truss bridge, the steel truss body of striding is by a plurality of segmentation roof beam body concatenation constitution, including steel truss first (1) and steel truss second (2), the below of striding the steel truss body is provided with pier (3), stride the steel truss body greatly with link to each other through slide roof beam and slider between pier (3), its characterized in that: at least two sliding blocks (5) are arranged;

the sliding block (5) comprises a sliding block main body (51), the sliding block main body (51) is of a three-dimensional hollow structure, a plurality of inner reinforcing rib plates (52) are arranged in an inner cavity of the sliding block main body at intervals, the middle part of the bottom surface of the sliding block main body (51) is connected with an MGB sliding plate (53) through a connecting piece (54), and two sides of the sliding block main body are provided with limiting centering plates (55).

2. The double-slider pushing construction structure of a long-span steel truss bridge according to claim 1, wherein the connecting piece (54) is a countersunk bolt.

3. The double-slider pushing construction structure of a long-span steel truss bridge according to claim 1, wherein the inner reinforcing rib plates (52) are arranged at intervals along a normal direction.

4. The double-slider pushing construction structure of the large-span steel truss bridge according to claim 1, wherein the limiting centering plates (55) are of downward extending rectangular structures, and two limiting centering plates (55) are respectively located on two sides of the slideway beam.

5. The double-slider pushing construction structure of the large-span steel truss bridge according to claim 1, wherein a rear anchor reinforcing plate (56) is further connected between the plurality of inner reinforcing rib plates (52).