安阳地区膨胀土改性及动力特性试验研究  

Experimental Study on Dynamic Properties of Improved Expansive Soil

作　　者：高春华[1] 郭应诏[1] 

机构地区：[1]安阳师范学院土木建筑工程系,河南安阳455000

出　　处：《建筑科学》2009年第11期67-69,66,共4页Building Science

基　　金：河南省教育厅自然科学基础研究资助(2009B130001)

摘　　要：对安阳地区膨胀土进行了改性试验和动力特性试验研究,改性剂采用石灰按不同的比例进行试验。通过不同石灰掺量下改性土的常规试验、强度试验和动力三轴试验研究。得出改性后的土样其工程特性和力学强度指标都有了较大幅度的提高。结合具体施工条件,石灰掺量可取6%~7%,最佳含水量取15%~18%,最大干容重取18.2kN/m3,压实度大于95%可满足工程要求。This paper introduces conventional test and dynamic properties test of improved expansive soil. The modifier used in the test is lime and it is easy to get at local, and different amount of lime are used in this improved test. By changing the proportion between lime and expansive soil, the conventional test, strength test, expansive test and dynamic triaxial test are made respectively. The test results indicate that the engineering properties and strength parameters of the improved expansive soil are significantly improved and better than original expansive soil. Based on the conditions of eonstruction, it is suggested that the proportion of lime is 6 to 7 percent, the optimal water content is 15 to 18 percent, the maximum dry density is about 18.2kN/m3 and the compaction degree should be greater than 95 percent. Thus, it can meet the demand of project quality.

关 键 词：膨胀土 石灰掺入量 改性试验 动力特性 最佳含水量 最大干容重 

分 类 号：TU411.3[建筑科学—岩土工程] TU443.4[建筑科学—土工工程]