Construction method of long auger bored pressure grouting concrete uplift pile

Abstract

The invention discloses a method for constructing a long auger bored cast-with-pressure concrete uplift pile. The method for constructing the long auger bored cast-with-pressure concrete uplift pile comprises the steps that the preparation for construction is made, paying-off for positioning is conducted, a drilling machine is prepared to work, a hole is formed by the drilling machine, drill lifting and fine aggregate concrete pouring are conducted at the same time, the hole is sealed and grouting is conducted, a steel reinforcement cage is inserted, and drilling tools and an earthwork are cleaned. The method for constructing the long auger bored cast-with-pressure concrete uplift pile has the advantages that concrete is pressed in a soil body and is located on the bottom and the side wall of the pile according to the specific grouting technique, the concrete and the soil body are glued into a whole, and in this way, the contact area between a pile body and the soil body is increased; compared with a traditional uplift pile, the uplift performance of the long auger bored cast-with-pressure concrete uplift pile is improved remarkably.

Description

technical field [0001] The invention relates to a construction method of a long auger bored pressure grouting concrete uplift pile. Background technique [0002] With the development of urban construction in our country, land resources are becoming more and more tense, and more and more attention has been paid to the development of underground space. At the same time, many new technical problems have been brought to the design and construction of the project, among which the pullout resistance of the basement is particularly prominent. Due to the buoyancy of groundwater during the construction or normal use of some buildings, the basement floor will bulge to varying degrees, and in severe cases, it will cause uneven floating of the building, affecting the safety of the project and the normal use of the building. Therefore, the pullout design has become a problem often considered in the development and design of underground space. [0003] In the existing engineering design,...

AI Technical Summary

Problems solved by technology

Although the anti-uplift pile technology has been used for many years, there are still some problems, mainly as follows: 1. The uplift resistance performance of various types of piles varies greatly, and some pile types basically do not have the ability to resist uplift, so they cannot be used as uplift piles; 2. For each type of pile, its uplift bearing capacity is often much smaller than the vertical compressive ultimate bearing capacity, which cannot give full play to the performance of the pile. Improving the uplift resistance of piles is an important topic in the field of pile foundation engineering research.

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