桩侧土注浆提高单桩承载力试验研究  

Test of Grouting Surrounding Pile for Improving Bearing Capacity

作　　者：周国庆[1] 梁恒昌[1] 赵光思[1] 

机构地区：[1]中国矿业大学建筑工程学院,江苏徐州221008

出　　处：《中国矿业大学学报》2005年第3期265-269,共5页Journal of China University of Mining & Technology

基　　金：中国科学院知识创新工程重大项目(KZCX1-SW-04)

摘　　要：通过自行设计的桩基注浆加固系统,采用物理模型试验方法,研究了桩侧土体注浆后桩的工作机制和破坏特征,并通过试验给出了桩体的荷载沉降特征曲线.对桩身(轴力)应变分析以及桩侧土体应力的分析研究结果表明,桩侧土体注浆加固后,桩侧土体的力学性能得到提高,单桩承载力提高59%～77%.Using the pile grouting system and the test method of the physical model, the pile's working mechanism and destroying characters were studied after grouting surrounding the pile. The loads-settlement curves of the model pile were obtained, and the axis stress of the pile and the stress distribution of surrounding soil were also analyzed. The results indicate that the mechanics performance of the soil around the pile can be improved and the bearing capacity of the pile can be increased by a factor of 59 %~77 % by means of grouting the surrounding soil.

关 键 词：单桩承载力 试验研究 桩侧土 注浆加固 自行设计 试验方法 物理模型 破坏特征 工作机制 研究结果 土体应力 应变分析 特征曲线 荷载沉降 力学性能 桩基 轴力 桩身 桩体 

分 类 号：TU473.11[建筑科学—结构工程] TU473.1[建筑科学—土工工程]