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Post-grouting construction method of bridge cast-in-place pile

A construction method, cast-in-situ pile technology, applied in sheet pile walls, foundation structure engineering, construction, etc., to achieve the effects of reducing pile length, saving costs, and improving pile bottom resistance

Inactive Publication Date: 2017-12-26
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of post-grouting technology can not only effectively solve the problems of hole bottom sediment, mud retaining wall mud and pile side mud skin that affect the bearing capacity of pile foundation, but also can strengthen the soil within the set range of pile bottom and pile side, so that Greatly improve the bearing capacity of pile foundation, improve pile group effect and pile foundation deformation

Method used

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  • Post-grouting construction method of bridge cast-in-place pile
  • Post-grouting construction method of bridge cast-in-place pile
  • Post-grouting construction method of bridge cast-in-place pile

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Embodiment Construction

[0036] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] The method of the present invention, such as figure 1 shown, including the following steps:

[0038] Step 1 Fabrication of the grouting nozzle

[0039] The grouting nozzle is arranged at the bottom or middle of the pile along the outer side of the reinforcement cage and arranged in a ring around the pile body.

[0040] The inner diameter of the grouting nozzle is The flexible high-pressure plastic pipe with steel wire is made of qualified materials and processed into a grouting nozzle at the construction site.

[0041] First, use Drill the holes with an axial distance of 100mm, and stagger them in a spiral cross shape along the pipe circumference. After drilling, clean the drill chips in the pipe, wrap them with two layers of waterproof tape, and wrap them tightly with iron wire.

[0042] Step 2 Grouting pipe installation

[0043] The gr...

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Abstract

The invention discloses a post-grouting construction method of a bridge cast-in-place pile. The method comprises the following steps of (1) grouting nozzle manufacturing, (2) grouting pipe installing, (3) grouting pipe water testing and (4) pump-in test and pump-in plug opening. The method has the advantages that the structural reliability of the pile bearing capacity is improved, the method can be used as an effective remedial measure for a cast-in-place pile with quality defect, a grouting pipe can be piled in the pile-forming side for grouting to improve the single-pile bearing capacity, the single-pile bearing capacity of the drilled grouting pile can be improved, and the settlement of pile foundation can be controlled effectively.

Description

technical field [0001] The invention relates to a post-grouting construction method of cast-in-place piles for bridges, and belongs to the technical field of post-grouting construction of construction municipal bridges and large and medium-sized highway bridge projects. Background technique [0002] At present, the foundation structure in traditional bridge engineering is composed of caps and cast-in-place piles. The pile-based cast-in-place piles play a decisive role in the stability and safety of the bridge structure. The method of increasing the length and diameter of the pile foundation will increase the project cost after increasing the length and aperture of the pile foundation, especially the construction of large-diameter and super-long pile foundations is difficult, and it is easy to cause collapse holes and damage to the side resistance of the pile; The sediment in the pile hole is difficult to clean up, and it is not suitable for measurement. The existing cleaning...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/36E02D15/04
CPCE02D5/36E02D15/04E02D2250/003
Inventor 赵斌陈世军王鑫李丹丹齐鹏伟杜晓琳
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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