极小空间条件下应用全方位高压喷射注浆进行地基加固的技术试验

Technical Test of Foundation Bed Reinforcement by Application of Overall High-Pressure Jet Grouting Under Minimum Space Conditions

针对在极小空间条件下应用全方位高压喷射注浆进行地基加固、实现既有地下空间扩展和功能提升这一重要研究课题,研制了小型钻机及钻管,采用一种全方位高压喷射注浆加固技术,使施工的净高要求减至2.5 m,顺利地达成了极小空间条件下进行地基加固的目标,实现了良好的社会和经济效益。

Aiming at both the application of overall high-pressure jet grouting under minimum space conditions and the realization of an important research subject on the expansion of existing underground space and on its function promotion, a small-scale drilling rig and drill pipe were developed. In addition, an overall high-pressure jet grouting reinforcement technology has been used to reduce the requirement of net construction height down to 2.5 m, which not only met the requirement of foundation pit reinforcement under minimum space conditions, but also achieved good social and economic benefits.