冻土中单桩抗压承载力模型试验研究  

Model Experimental Study on Compressive Bearing Capacity of Single Pile in Frozen Soil

作　　者：汪仁和[1] 王伟[2] 陈永锋[3] 

机构地区：[1]中国科学技术大学力学和机械工程系,安徽合肥230022 [2]安徽理工大学土木工程系,安徽淮南232001 [3]国电电力建设研究所,北京100055

出　　处：《冰川冻土》2005年第2期188-193,共6页Journal of Glaciology and Geocryology

基　　金：安徽省自然科学基金项目(050440501);安徽省教育厅自然科学基金项目(2004kj110)资助

摘　　要：以新疆地区某高压输电线建设项目为背景, 在室内进行了人工冻结条件下桩的静载荷模型试验. 试验研究在不同冻结温度下冻土中单桩竖向荷载下的承载力特性及其力学现状, 分析了包括桩的轴力、桩土冻结强度及其分布规律, 以及桩端阻力特性和桩头竖向位移与荷载的关系曲线等. 研究获得了桩的冻结力、单桩竖向承载力与温度的关系等, 可为未来西部冻土地区桩基的设计与施工提供参考依据.A laboratory test is carried out of statical load on model pile under artificial frozen conditions, which is on the background of a high voltage transmission line construction project in Xinjiang Region. The load-bearing capacity of a single pile, in frozen soil with various temperatures, axis-direction stress, frozen strength between pile and soil, stress filed, resistance at the endpoint of a pile and the relation of vertical pile-top displacement and load are analyzed. The studies of the features of adfreezing force of pile and the relationship between vertical load-bearing capacity of a single pile and temperature are useful for pile foundation designing and constructing in western frozen areas.

关 键 词：单桩 模型试验 承载力 冻土 

分 类 号：TU446[建筑科学—岩土工程]