含水率对加筋土强度影响的真三轴试验研究  

True Triaxial Test Research on the Effect of Moisture Content on the Strength of Reinforced Loess

作　　者：李雪江[1,2] 骆亚生[1] 华维娜[3] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]山东昌乐建筑工程质量安全监督站,山东昌乐262400 [3]渭南职业技术学院,陕西渭南714000

出　　处：《人民黄河》2011年第9期131-132,共2页Yellow River

基　　金：国家自然科学基金资助项目(50578134);教育部新世纪优秀人才支持计划项目(NECT-06-0864)

摘　　要：在真三轴试验的基础上,比较分析了不同含水率对加筋土强度的影响,结果表明:加筋黄土的应力应变曲线均为强硬化型,中主应力比越大,土体抗剪能力越大;在中主应力比一定的情况下,含水率越低,达到相同变形所需要的偏差应力越大,含水率越高,偏差应力越小;黏聚力随中主应力比的变化比内摩擦角随中主应力比的变化更加明显。On the basis of true triaxial test the influence of different moisture content on the strength of reinforced loess is analyzed.The results show that the relation curves of stress-strain of reinforced loess all appear as tough type,and the shear strength becomes bigger with the increase of ratio of intermediate principal stress;for a given ratio of the intermediate principal stress,as the value of moisture content is small,the more bias stress is needed when getting the same deformation,as the value of moisture content is big,the less bias stress is needed;the change of adhesion with the ratio of the intermediate principal stress is more significant compared to the change of internal friction angle with ratio of the intermediate principal stress.

关 键 词：含水率 加筋土 中主应力比 三轴试验 

分 类 号：TU411.7[建筑科学—岩土工程]