灰土改良土动力变形特性试验研究  

Experimental Research on Dynamics Deformation Characteristics of Lime Improved Soil

作　　者：曾国红[1] 彭海燕[1] 冯俊琴[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,太原030024

出　　处：《路基工程》2010年第1期14-16,共3页Subgrade Engineering

基　　金：国家自然科学基金项目(50578104);太原市专项基金项目(202-22023002)

摘　　要：通过动三轴试验,研究了灰土改良土在动荷载作用下的变形特性,以及围压、掺灰比及龄期对动弹性模量的影响。研究表明:灰土改良土的动变形与动应力水平及动荷次数相关;其临界动应力随围压及掺灰比的增加而增加;最大动弹性模量随围压、掺灰比及龄期的增长而增长;Ed/Edmax与动应变εd关系曲线具有良好的归一性。Through dynamic triaxial test, a research is made on the deformation characteristics of lime improved soil under the effect of dynamic load as well as the influence of confining pressure, cement proportion and age on dynamic elasticity modulus. The result indicates that dynamic deformation of lime improved soil is related to dynamic stress level and dynamic load degree; the critical dynamic stress increases with the increase of confining pressure and cement proportion; the maximum dynamic elasticity modulus increases with the increase of confining pressure, cement proportion and age; the relation curve between Ed/Edmax and dynamic stress εd is well normalized.

关 键 词：灰土改良土 动荷载 动变形 动弹模量 

分 类 号：TU411.8[建筑科学—岩土工程]