固化吹填软土力学特性试验  

Experiment on mechanical properties of stabilized soft dredger fill

作　　者：杨爱武[1,2] 周金[3] 孔令伟[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071 [2]天津城建大学软土特性与工程环境重点实验室,天津300381 [3]中交四航工程研究院有限公司,广州510230

出　　处：《吉林大学学报（工学版）》2014年第3期661-667,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51179186;41372291);天津市科技发展计划项目(06YFSZSF04000)

摘　　要：对CJDS07型固化剂固化的天津滨海吹填软土的力学特性试验研究。结果表明:吹填固化土的压缩模量、抗剪强度、结构性都随着龄期的增长逐渐增加,固化土逐渐由高压缩性转化成为中压缩性。吹填固化土的应力-应变关系受围压的影响较大,当围压小于某一值时,应力-应变曲线为应变软化型,反之为应变硬化型。基于以上研究成果,以邓肯张模型为基础,建立了适用于吹填固化土的应力-应变关系模型。The mechanical characteristic of the soft dredger fill, which is stabilized by the CJDS07 agent, is studied in Tianjin new area. The results show that the compression modulus, shear strength and structure of the stabilized soft dredger fill increase with the curing age. The stabilized soil gradually changes from high compressibility to middle compressibility. The stress and strain relationship of the stabilized soil is highly influenced by the confining pressure, that when the confining pressure is smaller than a certain value, the relationship is tend to be strain softening, otherwise, it is strain hardening. Based on the above research results and Dun--Chang model, the stress--strain relationship model suitable for the stabilized dredger fill is established.

关 键 词：土木建筑工程 固化土 压缩特性 抗剪强度特性 应力-应变关系 

分 类 号：TU472[建筑科学—结构工程]