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Post mudjack construction technics for sidewal and bottom of bore of filling pile

A technology of bored piles and construction technology, applied in sheet pile walls, infrastructure engineering, construction, etc., can solve the problems of increasing the bearing capacity of the pile bottom, the lateral friction resistance, and the backflow of the grouting equipment, so as to improve the bearing capacity of the pile end. The effect of force, the expansion of the influence range, and the avoidance of grouting failure

Inactive Publication Date: 2005-11-09
北京城建中南土木工程集团有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a post-grouting construction technology and grouting equipment for the pile side and bottom of the bored pile, to solve the problem that the bearing capacity of the pile bottom and the side friction resistance between the pile body and the soil need to be further enhanced, and solve the problem of grouting. Equipment slurry backflow problems

Method used

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  • Post mudjack construction technics for sidewal and bottom of bore of filling pile
  • Post mudjack construction technics for sidewal and bottom of bore of filling pile
  • Post mudjack construction technics for sidewal and bottom of bore of filling pile

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Embodiment Construction

[0018] Example figure 1 , 2 , 3, the drilled cast-in-place pile pile side of the present invention, pile bottom back pressure grouting device comprises the grouting pump 1, the grouting hose 2 and the grouting pipe 3 that are connected in sequence, the grouting pump 1 and the pressure gauge 18 connections, the grouting pipe 3 includes three pile side grouting pipes 10 and two pile bottom grouting pipes 11, and the three pile side grouting pipes 10 are evenly arranged within the circumference of the reinforcement cage 12, basically in an equilateral triangle; The pile bottom grouting pipes 11 are symmetrically arranged, and one of them is a spare pipe or used as a secondary splitting grouting. The pile bottom grouting pipe 11 should grow 20-30cm out of the reinforcement cage, so that its root can penetrate into the soil layer within the influence range of the drill bit at the bottom of the hole and extend into the bearing layer, for example, it can extend to the pebble layer 1...

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Abstract

A post-grouting technology and equipment for the side and bottom of bored grouting pile is disclosed. At least two grouting pipes are arranged around the reinforcing bar cage. At least two grouting pipes are arranged at bottom of pile. The slurry prepared from cement slurry, anhydrous calcium thioaluminate and gypsum is grouted via said grouting pipe, which has a conic head to connect with a perforated steel pipe sleeved by an elastic rubber sleeve, a grouting piston in it and a spring under said piston and fixed to bottom of grouting pipe.

Description

technical field [0001] The invention relates to a method for pressure grouting of bored cast-in-situ piles in construction engineering and municipal bridge engineering foundation construction. Background technique [0002] At present, most high-rise buildings use bored pile foundations in order to meet the design bearing capacity and settlement requirements. The biggest disadvantages of the bored pile technology are: 1. The sediment at the bottom of the pile is difficult to clean up, which reduces the bearing capacity of the pile end and increases the pile settlement; Side friction resistance between soil and soil. In order to avoid the influence of the above factors, the friction coefficient of piles and soil sides is often reduced during design, or the design of friction piles is the main design, thereby ignoring the end-bearing effect, or in order to achieve a good bearing layer, it has to pass through thick saturated soil layers to Hard regolith, sandy pebbles, or rock...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14E02D5/36E02D15/04
CPCC04B28/02C04B2111/70C04B22/0093
Inventor 华东李建军任刚高志刚张云王宪利
Owner 北京城建中南土木工程集团有限公司
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