固结时间对软粘土动剪切模量的影响  

Effect of Consolidation Time on Dynamic Shear Modulus of Soft Clay

作　　者：王炳辉[1] 杨树才 陈国兴[1] 战吉艳[1] 

机构地区：[1]南京工业大学岩土工程研究所,南京210009 [2]南京地下铁道有限责任公司,南京210008

出　　处：《防灾减灾工程学报》2009年第4期399-404,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金重大研究计划项目(90715018);江苏省自然科学基金重点项目(BK2006702B);江苏省六大人才高峰资助计划项目(06-F-008)资助

摘　　要：随着固结时间的增加,试样逐渐变硬的硬化效应使软粘土的动剪切模量增大;同时,随着固结时间的增加,试样高度和直径明显减小的尺寸效应,也使软粘土的动剪切模量受到显著的影响。通过软粘土自振柱试验,分析了固结时间对软粘土的最大动剪切模量、动剪切模量比和试样尺寸的影响;根据自振柱试验的基本原理,分析了试样尺寸的变化对软粘土动剪切模量的影响;结合试验得到的固结时间和试样尺寸的关系,分析了固结时间通过试样尺寸对软粘土动剪切模量的影响。The hardened effect that represents the soft clay harden gradually with the increment of consolidation time, makes dynamic shear modulus of soft clay increasing; meanwhile, the size effect that represents the height and diameter of the sample decreasing gradually, also produces effects on dynamic shear modulus of soft clay. A serial of free vibration column tests of soft clay is conducted to analyze the effects of consolidation time on maximal dynamic shear modulus, dynamic shear modulus ratio and sample＇s size of soft clay. According to the basic principle of the free vibration column test, the effects of varied sizes of sample on dynamic shear modulus of soft clay are analyzed. Combined with the relationships between consolidation time and samplers size obtained from the tests, the size effects of consolidation time on maximum dynamic shear modulus of soft clay are analyzed.

关 键 词：固结时间 试样尺寸 软粘土 动剪切模量 自振柱试验 

分 类 号：TU411.7[建筑科学—岩土工程]