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Soft soil area pile-supported empty box bridge abutment

A pile-supported, regional technology, applied in the direction of bridges, sheet pile walls, bridge parts, etc., can solve the problems of abutment bearing capacity and durability reduction, increase of abutment's own weight, abutment steel bar corrosion, etc. The effect of reducing the amount, increasing the weight of the box, and slowing down the corrosion damage

Active Publication Date: 2021-05-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the operation of the bridge, impurities such as water and soil are easy to seep into the cavity of the abutment, which will further increase the weight of the abutment itself; when the concrete ages and cracks, fine particles of impurities in the external environment will also infiltrate As a result, its self-weight continues to increase, and when water seeps into the cavity, it will accelerate the corrosion of the steel bars inside the abutment, resulting in a greatly reduced bearing capacity and durability of the abutment

Method used

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  • Soft soil area pile-supported empty box bridge abutment
  • Soft soil area pile-supported empty box bridge abutment
  • Soft soil area pile-supported empty box bridge abutment

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Referring to the accompanying drawings, a pile-supported empty box abutment in a soft soil area includes one or more foundation piles 1, and the foundation piles 1 are vertically or obliquely arranged in the foundation soil; the top of each foundation pile 1 is fixedly connected with The bearing platform 2 is a rectangular reinforced concrete slab 21 or a circular reinforced concrete slab 22 . The cap plate 2 has a certain thickness, and its thickness value meets the requirements of the punching resistance and compressive bearing capacity of reinforced concrete, so as to prevent stress concentration at the connection between the box body 3 and the cap plate 2 . The top of one or more platform slabs 2 bears a box body 3, and the box body 3 is poured by reinforced concrete. The size and quantity of the box body 3 can be determined by the construction site or the prefabrication factory. The box body 3 includes a top plate 31, a bottom plate 32, and a side plate 34 arranged...

Embodiment 2

[0024] Compared with Embodiment 1, foundation pile 1 in the present embodiment adopts cement-soil mixing pile, and the cement mixing amount of cement-soil mixing pile is not less than 15%, inserts 4 steel bars with a length of not less than 50cm at the top of the pile and Above, the diameter of the main reinforcement is not less than 16mm, and the diameter of the tie reinforcement is not less than 10mm. A part of the reinforcement is inserted into the cement-soil mixing pile, and the other part is integrated with the reinforcement in the cap plate 2, so that the foundation pile 1 and the cap plate 2 are connected as a whole.

[0025] The working steps of the present invention are as follows: the box body 3 is formed by pouring concrete, which is placed on the cap plate 2, and the inner cavity of the box body 3 is filled with EPS particles or EPS blocks 4, and the top of the foundation pile 1 is consolidated on the cap plate 2 Below; the cap plate 2 and the foundation pile 1 ar...

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Abstract

A pile-supported empty box bridge abutment in a soft soil area comprises one or more foundation piles which are vertically or obliquely arranged in foundation soil. The top of each foundation pile is fixedly connected with a bearing platform plate, the bearing platform plates are reinforced concrete plates, and the bearing platform plates and the foundation piles are connected into a whole; a box body is borne on the top of one or more bearing platform plates, the box body is formed by pouring reinforced concrete, a closed cavity is formed in the box body, and the cavity is filled with EPS particles or EPS blocks. According to the method, the situation of differential settlement caused by insufficient bearing capacity of foundation soil in a soft soil area can be well made up, and the phenomenon of bump at the bridgehead is relieved; the method has the advantages of low requirement on the bearing capacity of the foundation, less steel bar consumption, economy, light weight and the like.

Description

technical field [0001] The invention relates to the technical field of highway and bridge engineering, in particular to a pile-supported empty box abutment in soft soil areas. Background technique [0002] The abutment is a structure located at both ends of the bridge, supporting the superstructure of the bridge and connecting with the embankment. Its function is not only to transfer the load of the superstructure of the bridge to the foundation, but also to stabilize the subgrade at the bridgehead, so that the bridgehead line and the bridge line can be connected reliably and smoothly. connect. Commonly used abutments include pile abutments, light abutments, gravity abutments, combined abutments, etc. [0003] In soft soil areas, especially in deep soft soil areas, some bridges often have uneven settlement between the bridge deck and the foundation soil at the bridge head due to the weight of the superstructure and traffic loads, resulting in a series of problems such as br...

Claims

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Application Information

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IPC IPC(8): E01D19/02E02D5/22E02D5/34E02D5/46
CPCE01D19/02E02D5/22E02D5/34E02D5/46
Inventor 王国才朱仕伟杭致远徐启鹏刘祎阳
Owner ZHEJIANG UNIV OF TECH