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
CN1226491CInactive 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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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
北京城建中南土木工程集团有限公司
Publication Date
2005-11-09
Estimated Expiration
Not applicable · inactive patent

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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.
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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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