管桩沉桩过程中饱和软粘土地基孔压变化实测分析  

Measuring analysis on pore pressure of saturated soft clay ground in the sinking of pipe piles

作　　者：潘赛军[1,2] 凌道盛[2] 陈云敏[2] 

机构地区：[1]台州市建设工程设计审查中心,浙江台州318000 [2]浙江大学建筑工程学院,杭州310027

出　　处：《工程勘察》2009年第5期21-25,共5页Geotechnical Investigation & Surveying

摘　　要：预应力管桩沉桩过程中,饱和软粘土地基会产生较大的塑性变形和超静孔隙水压力,影响地基的使用功能。本文以浙江省台州地区一典型软土地基为工程背景,对管桩在饱和粘土中沉桩过程中地基超静孔压进行了原位观测,并与Vesic柱形和球形扩张理论解进行了对比分析,研究了沉桩过程中地基超静孔压的变化规律及影响范围,可为同类工程的设计和施工提供参考。The larger plastic deformation and excess pore water pressure would be resulted in during the sinking of prestressed pipe piles, which would influence the behavior of the ground. Taking the typical soft ground in Taizhou of Zhejiang province as the engineering example, the in-situ measuring of the excess pore water pressure in saturated clay ground during the construction of the piles was carried out, and the comparison analysis with the solutions from Vesic cylindrical and spherical expansion theory was also done. The changing rules of excess pore water pressure and its influence range during the sinking of the piles were studied, which would provide an important basis for the design and construction of the similar projects.

关 键 词：管桩 沉桩 超静孔压 软粘土地基 

分 类 号：TU413.7[建筑科学—岩土工程] TU473.13[建筑科学—土工工程]