真空动力固结联合扩底旋喷桩在饱和软粘土地基加固中的应用研究

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基金项目:

上海市重点学科建设资助项目

DCM Combined With Vacuum Dewatering Treatment and Extended Bottom Rotary Jet Grouting Pile Applied to Reinforce the Saturated Soft Clay Foundation

Department of Geotechnical Engineering, Tongji University, Shanghai 200092 China

摘要: 针对饱和软粘土的工程特性,采用了真空动力固结联合扩底旋喷桩加固饱和软粘土地基。结合江苏某软粘土地基加固工程,在探讨其加固机理的基础上,通过对加固过程的方案设计及现场试验结果的分析和讨论,表明该法能够充分发挥强夯、真空降水及旋喷注浆各自的技术优势。该法具有工期短、造价低、预沉降可控、加固效果好等优点。进一步拓宽了饱和软粘土地基的处理方法,为我国沿海地区软粘土地基处理工程提供了新的途径。
- 饱和软粘土 /
- 真空动力固结 /
- 扩底旋喷桩 /
- 硬壳层
Abstract: DCM(dynamic compaction method) combined with Vacuum dewatering treatment and extended bottom rotary jet grouting pile is adopted to reinforce saturated soft clay foundation. The reinforcement mechanism is discussed. Combining with a reinforcement project in J iangsu province, the in-situ test results demonstrate that the method can fully exert the advantage of DCM, vacuum dewatering and rotary jet grouting pile. It shows that this method saves both time and money,and the pre-subside is controllable too.This method proposes a new way for the treatment of the saturated soft clay foundation in the coastal areas and improves in approcaches to the treatment of saturated clay.
- saturated soft clay /
- DMC combined with Vacuum dewatering treatment /
- extended bottom rotary jet grouting pile /
- crust layer