大湾区流域水环境治理中不同工艺参数与高压旋喷桩稳定性响应研究

Research on Different Process Parameters and Stability Response of High Pressure Jet Grouting Pile in Water Environment Management of Greater Bay Area

高压旋喷桩法是结合高压射流技术和浆液加固技术,对原有地基砂土进行冲击和重构,是应用最为广泛的软土地基处理方法之一。当前研究主要聚焦于单一施工工艺或者施工参数对高压旋喷桩质量的影响,而关于工艺参数与高压旋喷桩稳定性之间的响应研究较少。论文基于粤港澳大湾区流域水环境综合治理项目,开展高压旋喷桩稳定性现场试验,系统和全面探讨不同水泥含量、水灰比、土层深度、软土含水量及添加剂五个工艺参数与高压旋喷桩稳定性之间的响应关系,以期为相关软基处理工程提供更为细致的技术参考。

High-pressure jet grouting pile method is coupled with high-pressure jet technology and slurry reinforcement technology to impact and reconstruct the original foundation sand soil,which is one of the most widely used soft ground treatment methods.Existing studies mainly focuses on the influence of a single construction process or construction parameters on the quality of high-pressure rotary piles,while there is less research on the response between process parameters and the stability of high-pressure rotary piles.In this paper,based on the comprehensive water environment management project in the Guangdong-Hong Kong-Macao Greater Bay Area watershed,a field test on the stability of high-pressure jet grouting pile is conducted to systematically and comprehensively explore the response relationship between five process parameters and the stability of high-pressure rotary piles,including different cement content,water-cement ratio,soil depth,soft soil water content and additives,in order to provide a more detailed technical reference for relevant soft foundation treatment projects.