高能级强夯加固软基现场试验研究  

In-situ experimental research on high energy dynamic compaction on soft foundation

作　　者：孙田磊[1] 刘叔灼[2] 王永平[1] 张明飞[3] 

机构地区：[1]中交第四航务工程局有限公司,广东广州510230 [2]华南理工大学,广东广州510641 [3]东南大学,江苏南京210096

出　　处：《武汉大学学报（工学版）》2014年第6期789-793,共5页Engineering Journal of Wuhan University

摘　　要：依托沿海某碎石土回填地基上成功实施的10 000 k N·m高能级强夯实验区,通过深层水平位移监测项目,对高能级强夯施工过程中周边土体环境深层土体位移进行了分析,为高能级强夯的设计、监测提供了依据.通过实验区设置测斜管对水平位移随深度变化的趋势分析、隔振沟隔振效果分析,揭示了一些规律,为该工艺大面积推广应用及高能级强夯加固机理分析提供数据参考.对地基处理效果进行检验,对夯点和桩间土进行了4个荷载试验,利用荷载试验得到的p-s曲线根据切线模量法反算加固后土体的强度参数,最后利用反算的参数建立有限元模型进行分析.This paper studies the implementation of high energy of 10 000 k N·m dynamic compaction reinforcement of the coastal gravel backfill foundation.The deep soil displacements are analyzed through monitoring the deep soil displacements,in order to improve the high energy dynamic compaction design and lay a foundation for monitoring.Conclusions can provide data reference for the technology popularization and application to large area; and high energy dynamic compaction mechanism analysis is made by analyzing inclinometer variation with depth and vibration isolation effect.The reinforcement effect is examined by 4 loading tests.Based on tangent-modulus method,the strength parameters of soil are back calculated through p-s curves obtained by loading tests.Finally,by using the strength parameters of soil,finite element model is built to analyze the effect of reinforcement.

关 键 词：高能级强夯 深层土体位移 加固效果 有限元法 

分 类 号：TU472.3[建筑科学—结构工程]