Drilling and high-pressure grouting construction method for uplift pile

Abstract

The invention discloses a drilling and high-pressure grouting construction method for an uplift pile. The drilling and high-pressure grouting construction method includes the steps that step1, construction preparation is performed; step2, paying-off positioning is performed; step3, a drilling machine is in place; step4, drilling is performed; step5, casing running is performed; step6, drilling is continued to a designed elevation; step7, hole sealing grouting is performed; step8, concrete pouring is performed; step9, steel bars are inserted; step10, drilling tool and earthwork clearing is performed. The drilling and high-pressure grouting construction method has the advantages that in the drilling process, noise is low, vibration is small, the construction period is short, influences on surrounding traffic and social activities are small, and the construction method is a green construction method; while the uplift bearing capacity of a foundation is improved, the construction method saves a lot of resources and energy, and has remarkable social benefits.

Description

technical field [0001] The invention relates to a construction method of a bored high-pressure grouting anti-lift 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 utilization of underground space. [0003] In the existing engineering design, the up...

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 pile type, its pullout resistance is often much smaller than the vertical compressive ultimate bearing capacity, which cannot give full play to the performance of the pile. Improving the pullout resistance of piles is an important topic in the field of pile foundation engineering research.

Images