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Convenient repair method for pile foundation of bridge bored pile

A technology for cast-in-place piles and bridges, used in excavation, sheet pile walls, infrastructure engineering, etc., can solve problems such as substandard quality, prolonged construction period, and rising costs, achieve high soil spalling and collapse, prevent soil spalling and collapse, and protect the side wall effect

Inactive Publication Date: 2016-04-20
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

[0026] The present embodiment provides a bridge cast-in-place pile foundation repair method, comprising the following steps:

[0027]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;

[0028] S2. Cut off the part that does not meet the standard, and check up and down to confirm that the pile...

Embodiment 2

[0040] 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.

[0041] 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

[0043] This embodiment provides a method for repairing cast-in-situ piles of bridges, which is an improvement on the basis of Embodiment 1 or Embodiment 2. Smear a layer of adhesive on the inner wall of the space and the outer wall of the bridge cast-in-place pile foundation exposed in the side well, and the adhesive includes by weight: cement: medium sand: melon stone: E44 epoxy resin : Butyl phthalate: KH-560 silane coupling agent: curing agent=440:660:967:119:7.4:2.2:89.

[0044] 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 about 2.16Mpa, so it can greatly strengthen the relationship between th...

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PUM

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Abstract

The invention provides a convenient repair method for a pile foundation of a bridge bored pile. The convenient repair method comprises the following steps: excavating a side well in one side of the pile foundation at an approximate position of a substandard part, so that the depth of the side well is greater than the lowest end of the substandard position by at least 50 cm; and ensuring all of the substandard part to expose; then, punching out the substandard part, and clearing punched-out silt; and finally, using repair concrete to carry out pouring on the side well, so that the repair concrete is completely filled into the punched-out space and into partial side well connected to the punched-out space; and carrying out filled-soil compaction on the side well after the repair concrete maintenance is complete. According to the repair method provided by the invention, the repair concrete can be filled into the punched-out space very well, is fitted to and is in contact with the inner wall of the punched-out space, and can be combined with the original pile foundation very well after being maintained, so that, in comparison with the prior art, the cost can be saved and the construction period can be shorted.

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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IPC IPC(8): E02D5/64E02D17/08C08L83/06C08K3/36C09J163/00C09J11/04C09J11/06
CPCE02D5/64C08J5/18C08J2383/04C08K5/12C08K13/02C08K2201/003C08L83/06C08L2203/16C08L2205/02C08L2205/035C09J11/04C09J11/06C09J163/00E02D17/08E02D2300/0006E02D2300/002E02D2450/10C08L83/04C08K3/36
Inventor 王良源
Owner 王良源