软黏土地基中振动挤土桩施工对周围建筑物影响的分析  

Influence of vibratory dense-squeezing pile construction on surrounding buildings

作　　者：方华建 蒋军[3] 胡琦 FANG Hua-jian;JIANG Jun;HU Qi(Zhejiang Zhefeng Engineering Consulting Co.,Ltd.,Hangzhou 310019,China;Dongtong Geotechnical Technology Co.,Ltd.,Hangzhou 310019,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江浙峰工程咨询有限公司,浙江杭州310019 [2]东通岩土科技股份有限公司,浙江杭州310019 [3]浙江大学建筑工程学院,浙江杭州310058

出　　处：《地基处理》2020年第3期217-221,共5页Journal of Ground Improvement

摘　　要：通过对深厚软黏土地基中振动沉管砂石桩的施工监测,分析了振动响应随桩打入深度及土层的变化规律,探讨了周围土体深层水平位移及建构筑物沉降随打桩量和打桩距离的关系。结果表明,在深厚软黏土地基中进行振动挤土桩的施工,振动效应不可忽略。打桩点距离周围建构筑物1~2倍桩长时,振动效应大于挤土效应;距离1倍桩长范围内时,挤土效应起主要作用。Through the construction monitoring of vibrating sunken tube sandstone pile in deep soft clay foundation,the vibration response varies with driving depth was analyzed.The relationships between deep horizontal displacement of surrounding soil and pile driving amount,pile driving distance were discussed.The results show that the vibration effect cannot be neglected in vibrating construction of dense-squeezing piles in deep soft clay foundation.When the pile driving point is 1 to 2 times the length of the surrounding buildings(structures),the vibration effect is larger than the squeezing effect.However,the squeezing effect plays a major role when the distance is 1 times of the pile length.

关 键 词：振动效应 挤土效应 动荷载 

分 类 号：TU74[建筑科学—建筑技术科学]