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Stable repairing method for bridge cast-in-place pile foundation

A technology of cast-in-situ piles and bridges, which is applied in the repair of basic structures, basic structure engineering, construction, etc., can solve problems such as extended construction period, increased cost, and substandard quality, so as to enhance the supporting effect and prevent uneven supporting strength. The effect of strengthening the overall strength

Inactive Publication Date: 2016-05-04
王良源
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the technical problem that the quality of bridge cast-in-place piles in the prior art is not up to standard when the wall of the excavated hole collapses. In order to complete the construction, the workers have to re-dig the hole for pouring, resulting in increased costs and extended construction period. defects, thus providing a repair method for bridge cast-in-situ pile foundation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment provides a bridge cast-in-place pile foundation repair method, comprising the following steps:

[0028]S1. Excavate side wells on the side of the bridge cast-in-place pile foundation close to the substandard part and on the side opposite to this side, so that the outer wall of the bridge cast-in-place pile foundation is close to the bridge cast-in-place pile pile in the substandard part The side well on one side of the foundation is exposed, and the depth of the side well is controlled to be at least 50cm deeper than the lowest end of the substandard part, and the side well on the other side is far away from the bridge cast-in-place piles in the substandard part The distance of the base is not more than 50cm; in the present embodiment, because the height range of the unqualified position is 5.8-6.1m, so the depth of the side well is 6.15m;

[0029] S2. chisel out the non-standard part to form a chiseled space connected to the side well closest to ...

Embodiment 2

[0047] This embodiment provides a method for repairing cast-in-situ piles of bridges, which is an improvement on the basis of Embodiment 1. The difference is that in step S3, the repairing concrete is used to completely carry out the removal of the space and the side well. pouring.

[0048] The advantage of this embodiment is that the poured repair concrete can be filled into the inside of the excavated space under a very large pressure, and is in close contact with the inner wall of the excavated space; The uneven support strength of the pile foundation can enhance the supporting effect of the original pile foundation.

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PUM

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Abstract

The invention provides a stable repairing method for a bridge cast-in-place file foundation. A side well is dug in the position, which is the rough position of the substandard parts, on one side of the pile foundation, and the side well is made to be at least 50 cm deeper than the lowest end of the substandard position, so that it is ensured that all the substandard parts are exposed outside; then the substandard parts are chiseled away, and after sediment which is chiseled away is removed thoroughly, the side well is poured through repairing concrete, the repairing concrete is made to completely enter the chiseled space and the part, connected with the space, in the side well in a filling manner, and after curing of the repairing concrete is completed, soil filling and compacting are conducted on the side well. By means of the stable repairing method, the chiseled space can be well filled with the repairing concrete, the repairing concrete is attached to the inner wall of the chiseled space and is in contact with the inner wall of the chiseled space, and in addition, the repairing concrete can be well combined with the original pile foundation after being cured. Compared with the prior art, cost can be saved, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of repair and maintenance of bridge pile foundations, in particular to a repair method for bridge cast-in-place pile foundations. Background technique [0002] Pile foundation is a common foundation form in bridge engineering, which can transmit the upper bridge load into the rock foundation and provide stable support for it. As a common form of bridge pile foundation, cast-in-place piles have the advantages of no vibration, no soil compaction, and low noise during construction, so they are widely used in the field of bridge construction. [0003] When making cast-in-situ piles, it is first necessary to use a rotary drilling rig to dig holes. After the holes are dug, put them into a reinforcement cage, and finally pour concrete. Since the wall of the hole dug out by the rotary drilling rig is soil, when concrete is poured into the hole, the part of the hole wall with softer soil is easily peeled off after b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D37/00
CPCE02D37/00
Inventor 王良源
Owner 王良源