Bridge pier bent cap lower supporting system and construction method thereof

A support system and construction method technology, applied in bridges, bridge materials, bridge construction, etc., can solve the problems of being unable to bear the joint action of dead load and traffic live load, insufficient bearing capacity, self-heavy structure, etc., to facilitate standardized prefabrication and Rapid construction with assembly, improved bearing capacity, and the effect of less material consumption

Active Publication Date: 2022-06-07
SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is: for the cap girder structure of the cap girder bridge pier lower support system in the prior art, the pier top cap girder usually adopts ordinary reinforced concrete or prestressed reinforced concrete structure, which has a large structure, insufficient bearing capacity, and high durability. Poor performance, unable to withstand the joint action of higher-level superstructure dead load and traffic live load in long-span scenarios, providing a support system for the lower part of bridge pier cap girder and its construction method

Method used

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  • Bridge pier bent cap lower supporting system and construction method thereof
  • Bridge pier bent cap lower supporting system and construction method thereof
  • Bridge pier bent cap lower supporting system and construction method thereof

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Experimental program
Comparison scheme
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Embodiment 1

[0072] This embodiment provides a support system for the lower part of a bridge pier cover beam, see Figure 1-13 , including a bridge pier 5 and a cover beam, the cover beam includes a steel bar-shaped closed box 1, the closed box 1 is provided with a number of prestressed steel bundles 2 in the longitudinal direction, and the closed box 1 is filled with Concrete 3, the bottom surface of the closed box 1 is connected to the top of the bridge pier 5.

[0073] The steel box in this embodiment refers to the closed box body 1 . The lower support system of the bridge pier cover beam refers to the joint structure of the bridge pier 5, the cover beam and the connection structure between them.

[0074] For the cover beam described in this scheme, the strip-shaped closed box 1 is designed according to the shape and size required for the force safety of the cover beam, and the closed box 1 is used as the support template for the subsequent concrete 3 pouring and prestress tensioning, ...

Embodiment 2

[0095]The present embodiment provides a construction method for the lower support system of a bridge pier cover beam as described in Embodiment 1, comprising the following steps:

[0096] S1. Install the outer ring steel sleeve 901 and the inner ring steel sleeve 902 on the top surface of the bridge pier 5, and then pour the first concrete body; then hoist the closed box 1 so that the connecting lugs 906 on the bottom surface are inserted into the inner ring steel in the corresponding limiting groove 909 inside the sleeve 902, so that the first concrete body supports the closed box 1;

[0097] S2, pour concrete 3 into the closed box 1 through the pouring hole 105;

[0098] S3, pouring the second concrete body 911, the construction is completed;

[0099] Wherein, before the step S1, it also includes the construction of the limiting groove 909 on the top of the pier and the welding of the connecting lugs 906 on the bottom surface of the closed box 1; before the step S2, it also...

Embodiment 3

[0102] The present embodiment provides a construction method for the lower support system of a bridge pier cover beam as described in Embodiment 1, comprising the following steps:

[0103] S01. Weld the vertically arranged shear nails 910 and the vertically arranged connecting lugs 906 with holes on the bottom surface of the lower flange plate 103 of the two I-beam girders 10 at the positions corresponding to the transverse middle of the bridge pier 5; on the bridge pier 5 Install the outer ring steel sleeve 901 and the inner ring steel sleeve 902 on the top surface, and then pour the first concrete body;

[0104] Before step S01, the double I-beam 10 can be prefabricated in the factory, the upper flange plate 101, the lower flange plate 103 and the web 102 are welded to form two pieces of the I-beam 10 member, and the box is welded at the corresponding position at the same time. The inner stiffener 6 and the box outer stiffener 7; each piece of I-beam 10 is divided into sever...

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Abstract

The invention relates to a pier capping beam lower supporting system and a construction method thereof. A bridge pier capping beam lower portion supporting system comprises a bridge pier and a capping beam, the capping beam comprises a steel strip-shaped closed box body, a plurality of prestressed steel beams are arranged in the closed box body in the longitudinal direction, the closed box body is filled with concrete, and the bottom face of the closed box body is connected with the top of the bridge pier. The closed box body has a restraining effect on the concrete three-way hoop, and the concrete compressive strength is improved; the concrete has a supporting effect on each plate of the closed box body, so that local instability is prevented; the closed box body and the concrete can be cooperatively deformed and jointly stressed under the action of prestress, so that the flexural ultimate bearing capacity of the combined structure and the toughness of the combined structure are improved. The closed box body can be used as a supporting template to complete self-erecting construction of the capping beam, a temporary support does not need to be erected, excessive construction sites do not need to be occupied, and interference to traffic under the bridge can be reduced to the maximum extent; the closed box body can prevent external environment from invading concrete in the box body, the durability is good, and the maintenance cost is low.

Description

technical field [0001] The invention relates to the field of roads and bridges, in particular to a lower support system of a bridge pier cover beam and a construction method thereof. Background technique [0002] With the increasing traffic pressure in my country, the construction of highways and urban bridges is developing towards the trend of more lanes and widening bridge decks, and the number of transverse beams has increased. At the same time, constrained by many conditions such as crossing lines, crossing rivers, crossing valleys, flooding and environmental protection requirements, the lateral spacing and pier height of bridge piers continue to increase, and more and more cover beams are faced with large-span scenarios. Long cover beams with spans exceeding 30m or even 40m become the focus of future bridge engineering development, with a considerable scale and market. However, there is no experience in the design and construction of the cover beam structural system in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/00E01D101/28
CPCE01D21/00E01D19/00E01D2101/285Y02A30/60Y02A30/30
Inventor 康玲王波牟廷敏王欢胡鸥万川龙张杰阮飞鹏李成君邹圻柏颢原许诺李伟张翼何易修
Owner SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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