双向水泥土搅拌桩施工扰动试验分析  

Study on the Disturbance of Surrounding Soil During Deep Mixing Column Construction

作　　者：朱家祥[1] 席培胜[2] 

机构地区：[1]河海大学,江苏南京210024 [2]东南大学,江苏南京210096

出　　处：《施工技术》2007年第9期61-64,101,共5页Construction Technology

摘　　要：通过对水泥土搅拌桩施工过程和施工结束后,桩周土体中产生的超静孔隙水压力的测试,并运用固结度指标对比分析了双向水泥土搅拌桩和常规水泥土搅拌桩施工工艺施工对桩周土体的影响,分析了施工结束后桩周土体强度随时间的变化趋势。论证了双向水泥土搅拌桩施工工艺较常规水泥土搅拌桩施工工艺能够大幅度降低对桩周土体的扰动,以及施工结束后桩周土体强度恢复速度亦明显提高。　The construction of deep mixing may induce excess pore water pressure in the surrounding soil.Through the measurement of the excess pore water pressure during construction and its distribution after the construction,the degree of consolidation,the effect of the construction on the surrounding soil are studied in this paper.The differences between two different deep mixing methods are analyzed.The test results show that the bi-directional cement-soil deep mixing method can reduce the disturbance on the surrounding soil greatly than the common deep mixing method used in China,while the increase of the strength of surrounding soil after construction is speeded up.

关 键 词：深层搅拌法 双向搅拌桩 超静孔隙水压力 扰动 

分 类 号：TU753.65[建筑科学—建筑技术科学]