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| 基于数字图像测量技术的基坑开挖卸荷试验研究 | |
| 引用本文： | 郑卫锋,邵龙潭,贾金青.基于数字图像测量技术的基坑开挖卸荷试验研究[J].大连理工大学学报,2008,48(6):851-855. |
| 作者姓名： | 郑卫锋 邵龙潭 贾金青 |
| 作者单位： | 1. 大连理工大学,工业装备结构分析国家重点实验室,辽宁,大连,116024;国网北京电力建设研究院,北京,100055 2. 大连理工大学,工业装备结构分析国家重点实验室,辽宁,大连,116024 3. 大连理工大学,土木水利学院,辽宁,大连,116024 |
| 摘 要： | 以原状粉质黏土为试验土体,采用三轴数字图像测量技术为基础的测试仪器,对基坑开挖卸荷过程的土体应力路径进行模拟,研究不同应力路径条件下的土体应力-应变关系,分析侧向卸荷对基坑土体抗剪强度指标的影响.试验结果表明,经历侧向卸荷应力路径的土体抗剪强度指标与常规三轴加载试验明显不同.数值计算验证了不同应力路径的试验结果对基坑稳定与变形的影响.为了准确地分析基坑的稳定与变形情况,有必要在试验时尽可能模拟基坑的侧向卸荷应力路径. |
| 关 键 词： | 数字图像测量 应力路径 基坑开挖 侧向卸荷 抗剪强度 |
Experimental research on simulated foundation excavation unloading process based on digital image processing technique |
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| ZHENG Weifeng,SHAO Longtan,JIA Jinqing.Experimental research on simulated foundation excavation unloading process based on digital image processing technique[J].Journal of Dalian University of Technology,2008,48(6):851-855. | |
| Authors: | ZHENG Weifeng SHAO Longtan JIA Jinqing |
| Institution: | ZHENG Wei-feng1,2,SHAO Long-tan1,JIA Jin-qing31.State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China,2.Beijing Electric Power Construction Research Institute of SGCC,Beijing 100055,3.School of Civil , Hydraulic Engineering |
| Abstract: | Based on the testing apparatus of digital image processing technique,using silty clay as testing specimen,the stress paths under foundation excavation unloading process are simulated.In order to analyze and compare experimental data,triaxial shear tests with different stress paths are chosen,and the stress-strain characteristics and shear strength parameters are studied.The test results show that the shear strength parameters of soils after lateral unloading are different from those of conventional triaxial... |
| Keywords: | digital image processing stress path foundation excavation lateral unloading shear strength |
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