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U-shaped bridge abutment provided with pressure reducing plate

A technology for decompression boards and abutments, which is applied to bridges, bridge parts, bridge construction, etc., and can solve problems such as wall cracking and outward overturning

Pending Publication Date: 2021-06-08
CHANGSHA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the height of the abutment is high, the soil lateral pressure on the front wall and side wall is relatively large, and the filling pressure behind the abutment will squeeze the front wall, especially the side wall, causing the wall to crack or overturn outward. Therefore, In order to solve such problems, we propose a U-shaped abutment with decompression plate

Method used

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  • U-shaped bridge abutment provided with pressure reducing plate
  • U-shaped bridge abutment provided with pressure reducing plate
  • U-shaped bridge abutment provided with pressure reducing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In Example 1: different from the comparative example, the hollow cavity is constructed in a traditional way in combination with the implementation method in the comparative example, and then the sand and gravel filling layer 4 is firstly set at the inner bottom of the hollow cavity, and compacted by tamping, and then Lay the waterproof geotextile 3 on the gravel filling layer 4, and finally install the installation abutment 6 on the side wall 1 according to the distance of equal intervals, and weld the arched steel bar 10 at the middle position of the installation abutment 6 of each group, Weld a plurality of longitudinal steel bars 7 along the arc position of each group of arched steel bars 10, and finally pour concrete on the waterproof geotextile 3, and when the concrete cools, the concrete forms a decompression structure layer 5 with the arched steel bars 10 and the longitudinal steel bars 7;

[0030] Then repeat and stack along the sequence of the gravel filling lay...

Embodiment 2

[0032] In the second embodiment: different from the first embodiment, first, according to the size of the hollow cavity, pouring is carried out in different places, and the arched steel bars 10 and the longitudinal steel bars 7 are welded in turn, and then the decompression structure layer 5 is directly poured according to the size , Transfer to the construction site, can shorten the construction time.

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Abstract

The invention discloses a U-shaped bridge abutment provided with a pressure reducing plate; the U-shaped bridge abutment comprises a foundation, side wall bodies are arranged on the two sides of the upper surface of the foundation, a front wall body is arranged at the front ends of the side wall bodies, a hollow cavity is formed between the side wall bodies and the front wall body, a groove is formed in the front side of the upper end of the front wall body, and an abutment cap is arranged on the front side of the upper end of the front wall body. A gravel filling layer, waterproof geotechnical cloth and a pressure reduction structure layer are arranged in the hollow cavity in the vertical direction, the gravel filling layer, the waterproof geotechnical cloth and the pressure reduction structure layer form a partition bin layer, and all the partition bin layers are sequentially arranged from bottom to top. In the using process, in order to solve problems of bumping at the bridge head caused by the large settlement amount of filled soil of the bridge abutment, wall surface cracking caused by the large soil side pressure and the like, a pressure reduction structure is independently arranged, so that foundation deformation is uniform and excessive, the settlement difference of the foundations is reduced, bumping at the bridge head is prevented, and the driving stability is ensured.

Description

technical field [0001] The invention relates to the technical field of abutment structures, in particular to a U-shaped abutment provided with a decompression plate. Background technique [0002] The U-shaped abutment is an integral heavy-duty structure poured in place, mainly relying on its own weight to balance the earth pressure behind it. Most of the abutments are made of stone masonry or concrete. Because of its simple structure, large foundation bearing area, and small foundation stress, it is widely used in the substructure of various beam bridges and arch bridges. The U-shaped abutment has simple structure, large base bearing surface, small stress, and strong resistance to horizontal thrust. It is suitable for single-hole or multi-hole bridges with a filling height of 3-12m, especially arch bridges. However, the masonry volume of the U-shaped abutment is large. In the process of use, due to poor design considerations, high filling of soil behind the abutment, and in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/02
CPCE01D19/02
Inventor 彭旺虎夏力农
Owner CHANGSHA UNIVERSITY