Unlock instant, AI-driven research and patent intelligence for your innovation.

Bridge bored pile foundation repairing method

A technology of cast-in-situ piles and pile foundations, which is applied in the repair of foundation structures, foundation structure engineering, construction, etc., which can solve problems such as rising costs, prolonging construction periods, and substandard quality, so as to prevent uneven support strength and enhance support effects Effect

Inactive Publication Date: 2016-04-13
SHANDONG TRANSPORT VOCATIONAL COLLEGE
View PDF7 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The present embodiment provides a bridge cast-in-place pile foundation repair method, comprising the following steps:

[0032]S1. Use an ultrasonic detector to detect the pile foundation of the bridge pouring pile, and determine that the approximate location of the substandard part is around 6m underground;

[0033] 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 50cm deeper than the lowest end of the substandard part; in this embodiment, since the height range of the substandard position is 5.8-6.1m, therefore The depth of the lateral shaft is 6.15m;

[0034] S3. Cut off the substandard part and check up and down to ...

Embodiment 2

[0048] This embodiment provides a method for repairing cast-in-place piles of bridges, which is an improvement on the basis of Embodiment 1. The difference is that in step S5, the repairing concrete is used to completely carry out the removal of the space and the side well. pouring.

[0049] 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

[0051] This embodiment provides a method for repairing cast-in-place 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.

[0052] 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 t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a bridge bored pile foundation repairing method. The bridge bored pile foundation repairing method comprises the following steps: determining approximate positions of parts which are not up to standard with the aid of detecting equipment; then excavating a side well on one side of a pile foundation, wherein the depth of the side well is greater than that of the lowest end of a position which is not up to standard by 50 cm at least and all the parts which are not up to standards are enabled to be exposed; chiseling off the parts which are not up to the standard; cleaning hollow parts by clear water after chiseled silt is cleaned thoroughly; finally pouring the side well by using repairing concrete and enabling the repairing concrete to be completely filled in chiseled-off space and the part, which is connected with the chiseled-off space, inside the side well; and filling soil in the side well and compacting after complete curing of the repairing concrete. According to the repairing method, the repairing concrete can be filled in the chiseled-off space well and is in contact with the inner wall of the chiseled-off space in an attached manner, and after curing, the repairing concrete can be combined with the original pile foundation well. Compared with the prior art, the bridge bored pile foundation repairing method can save cost and shorten construction period.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E02D37/00
CPCE02D37/00
Inventor 赵树青
Owner SHANDONG TRANSPORT VOCATIONAL COLLEGE