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Building pile foundation repair process

A technology for buildings and pile foundations, which is applied in the repair of infrastructure, construction, and infrastructure engineering. Strong adhesive effect

Inactive Publication Date: 2016-03-30
王成财
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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 defects that the cast-in-situ piles in the prior art are 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 and pour, resulting in increased costs and extended construction period. , so as to provide a filling pile foundation repair method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present embodiment provides a kind of building pile foundation restoration technology, comprises the steps:

[0027] S1. Use ultrasonic detection to determine the specific location of the non-standard part of the pile foundation. The non-standard part of the ultrasonic detection belongs to the prior art, and will not be repeated here;

[0028]S2. Excavate a side well on the side of the bridge cast-in-place pile foundation near the substandard part. The smaller the inner diameter of the side well, the better. In this embodiment, the diameter is 80 cm, so that the bridge cast-in-place pile foundation can be as small as possible. The outer wall of the side is exposed in the side well, and the depth of the side well is controlled to be at least 30cm deeper than the lowest end of the substandard part; in this embodiment, since the height range of the substandard part is 5.8-6.1m, therefore The depth of the lateral shaft is 6.15m;

[0029] S3. Cut off the substandard par...

Embodiment 2

[0041] This embodiment provides a pile foundation repairing process, which is an improvement on the basis of Embodiment 1, the difference is that in step S4, the repairing concrete is used to completely pour the chiseled space and the side shaft.

[0042] 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.

Embodiment 3

[0044] This embodiment provides a pile foundation repair process, which is an improvement on the basis of embodiment 1 or embodiment 2, the difference is that in step S4, before pouring the repair concrete, the inner wall of the chiseled space is first And smear a layer of adhesive on the outer wall of the bridge pouring pile foundation exposed in the side well, the adhesive includes by weight: cement: medium sand: melon stone: E44 epoxy resin: benzene Butyl dicarboxylate: KH-560 silane coupling agent: curing agent=440:660:967:119:7.4:2.2:89.

[0045] The above-mentioned adhesive can well connect the outer wall of the original pile foundation and the newly poured repair concrete, thereby enhancing the bonding force between the repair concrete and the original pile foundation. Under the test conditions of the above-mentioned adhesive, the axial tensile strength of the new-old interface is about 1.7Mpa, the splitting tensile strength is about 1.14Mpa, and the shear strength is a...

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PUM

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Abstract

The invention provides a building pile foundation repair process. The process comprises the following steps: determining the positions of substandard parts of a pile foundation by utilizing ultrasonic testing; digging a side well on one side of the pile foundation at the approximate position of the substandard parts, enabling the depth of the side well to be at least 30cm deeper than the lowest end of the substandard parts, and ensuring that all the substandard parts are exposed; then, punching out the substandard parts, and cleaning up the removed silt; finally, pouring the side well with repair concrete, and fully filling the punching-out spaces and part of inner part of the side well connected with the punching-out spaces with the repair concrete; after complete curing of repair concrete, carrying out filled soil compaction for the side well. According to the repair process, the repair concrete can be put in the punching-out spaces well, is fitted with the inner walls of the punching-out spaces, and can be greatly combined with the original pile foundation together after curing. Compared with the prior art, the repair process can reduce the cost and shorten the construction period.

Description

technical field [0001] The invention relates to the technical field of repair and maintenance of building pile foundations, in particular to a method for repairing pile foundations of building pouring piles. Background technique [0002] Pile foundation is a common foundation form in bridge or other building engineering, which can transfer 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 ...

Claims

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Application Information

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