Rubber bag type grouting compaction pile applied to soft soil foundation reinforcement and piling method

Abstract

The invention provides a rubber bag type grouting compaction pile applied to soft soil foundation reinforcement and a piling method. The rubber bag type grouting compaction pile comprises a rubber air bag, a steel sleeve and a conical bottom support, wherein the rubber air bag is used for injecting concrete grout inwards after being vertically placed in a soft soil foundation, and a rubber bag type concrete compaction pile is formed in the soft soil foundation; the steel sleeve is arranged on the outer side of the rubber air bag in a sleeving mode and used for vertically feeding the rubber air bag to the set depth of the soft soil foundation and then pulling out the rubber air bag; and the conical bottom support is fixedly connected to the outer bottom of the rubber air bag and used for supporting the steel sleeve and preventing sludge from entering the steel sleeve. During piling, a PVD drainage plate is arranged in soft clay in a piling mode, and drainage consolidation is accelerated; then the steel sleeve, the rubber air bag and the conical bottom support are driven to the preset depth at the pile position; then the steel sleeve is pulled out, the position of the conical bottom plate is kept still, and the air bag is inflated after the steel sleeve is pulled out; and then grouting is conducted on the air bag through grouting equipment, and finally the rubber concrete compaction pile is formed. According to the rubber bag type grouting compaction pile applied to soft soil foundation reinforcement and the piling method, the problem that hole forming is difficult in a soft clay area is effectively solved, and the reinforcement effect of the soft soil foundation is improved.

Description

technical field [0001] The invention relates to a compaction pile. In particular, it relates to a rubber bladder type grouting compaction pile and a pile driving method applied to soft soil foundation reinforcement. Background technique [0002] The compaction pile method is one of the methods for soft soil foundation reinforcement. Usually, it is widely used in collapsible loess areas. The cylindrical steel pile tube is driven into the original foundation by means of impact or vibration, and the pile hole is formed after being pulled out, and then plain soil, lime soil, lime soil, cement soil and other materials are carried out. Backfilling and compacting, so as to achieve the formation of increased diameter piles, and form a composite foundation together with the original foundation. [0003] In the southeast coastal cities of my country, soft clay such as silt is widely distributed, and the physical and mechanical properties and engineering properties of this kind of so...

AI Technical Summary

Problems solved by technology

[0003] In the southeast coastal cities of my country, soft clay such as silt is widely distributed, and the physical and mechanical properties and engineering properties of this kind of soft soil are poor. Very prone to shrinkage or collapse holes, difficult to form holes, and limited reinforcement depth

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