岩土工程学报2024，Vol.46Issue(z2)：16-20,5.DOI:10.11779/CJGE2024S20013
基于能量的振冲碎石桩加密效果评价方法
Energy-based evaluation method for soil densification effects induced by vibro-compaction of stone columns
摘要
Abstract
In view of the fact that the conventional ground inspection methods are not suitable for the real-time monitoring and quality check of ground improvements due to the limitations in timely and full-scale inspection,an energy-based evaluation method for soil densification effects induced by vibro-compaction of stone columns is proposed,which can timely estimate the average densification effects of soils between stone columns.Based on the propagation theory of elastic waves in foundation,a calculation procedure of energy absorbed by soils is established,and the corresponding undrained cyclic triaxial tests on a prototype silty sand are conducted to establish the empirical model for generation of the excess pore water pressure.Then a case study of a reservoir dam project is conducted.It is found that,compared with that of the field monitored excess pore water pressure and the final void ratio obtained via post-construction inspection,the prediction accuracy of the proposed method is about 90%,which preliminarily validate the feasibility of the proposed method.关键词
振冲碎石桩/振动能量/弹性波/留振加密/超静孔压Key words
vibro-compaction of stone column/vibration energy/elastic wave/vibration-induced soil densification/excess pore water pressure分类
建筑与水利引用本文复制引用
周燕国,王春,庄端阳,姚鹏飞,张东超..基于能量的振冲碎石桩加密效果评价方法[J].岩土工程学报,2024,46(z2):16-20,5.基金项目
国家自然科学基金基础科学中心项目(51988101) （51988101）
国家自然科学基金面上项目(52278374) （52278374）
岩土工程长期服役性能及调控学科创新引智基地项目(B18047) （B18047）
