MBER固化土弹性模量的试验研究  

Experimental Research on Elastic Modulus of MBER Solidified Soil

作　　者：冀璐[1] 高建恩[1,2,3] 郝连安[2] 张元星[2] 孙胜利[1] 

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]西北农林科技大学资源环境学院,陕西杨凌712100 [3]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《水土保持通报》2012年第5期261-264,共4页Bulletin of Soil and Water Conservation

基　　金：国家"十二五"科技支撑计划项目"黄土丘陵沟壑区水土保持与高效农业关键技术集成与示范"(2011BAD31B05);水体污染控制与治理科技重大专项"保障渭河生态基流的关中地区农业节水及调控技术研究"(2009ZX07212-002-003-02)

摘　　要：弹性模量是固化土一项基本的力学性能指标,直接影响结构的静力和动力力学分析计算,对弹性模量的试验研究具有重要的实际意义。针对固化土弹性模量研究薄弱的问题,以自主研发的MBER土壤固化剂为研究对象,通过对杨凌试验区土样进行室内试验,分别对影响MBER固化土的弹性模量的土壤固化剂剂量、不同含水率和不同龄期3种因素进行分析研究。根据试验结果,获得了MBER固化土应力—应变关系曲线,得出固化土弹性模量在300～1 000MPa。固化土的弹性模量随着土壤固化剂剂量,含水率及龄期的增长呈增加趋势,而当含水率达到一定值时,固化土的弹性模量呈下降趋势。因此,通过合理控制土壤固化剂剂量及含水率,能够改善固化土的力学性能,进而达到改良固化土的目的。As one of the indices for basic mechanical properties of stabilized soil,elasticity modulus affects structure′s static and dynamic analysis and calculation.So,experimental research on elasticity modulus is of practical significance.In view of few researches on elasticity modulus of stabilized soil and by taking the independently developed soil stabilizer as a research object,the three factors of soil stabilizer dosages,different moisture contents and different ages affecting the MBER stabilized-soil′s elasticity modulus are separately studied by laboratory experiment using soil samples collected in Yangling experimental area.A stress-strain relationship curve is obtained from experimental result and the stabilized-soil′s elasticity modulus is found to be between 300 and 1 000 MPa.The stabilized-soil′s elasticity modulus is increased with the increases in soil stabilizer dosage,moisture content and age and however,it begins to drop down as a threshold value of moisture content occurs.By reasonably controlling soil stabilizer dosage and moisture content,mechanical properties of the stabilized soil can be improved for an improved stabilized soil.

关 键 词：MBER土壤固化剂 弹性模量 应力—应变曲线 

分 类 号：S279.2[农业科学—农业水土工程]