岩土力学2011，Vol.32Issue(10)：2998-3002,5.
膨胀性充填裂隙峰前本构关系实验研究
Experimental research on pre-peak constitutive relation of filled fracture with expansive medium
摘要
Abstract
Taking Na-bentonite as filling medium and cement mortar as fissure wall, the filled fractures are made. By means of normal compression and lateral restraint, the constitutive relations of filled fracture with expansive medium and under the conditions of different fracture widths and different water contents, are discussed. A large number of stress-strain data are obtained. It is shown that the fractures filled with expansive medium can be divided into three stages: rheological phase, compression phase and the elastic stage in the pre-peak. At the beginning of the experiment, the filled fracture is in the rheological state; that is to say, the stress nearly remains unchanged, but the strain continues to increase. With the finite deformation and the normal stress increase, the filled fracture overall intensity increase, and demonstrate elastic characteristics gradually. Based on the results, the mechanical model of inverted Saint-Venant body is put forward; pre-peak constitutive equation of filled fracture with expansive medium is established; and its mechanism is analyzed.关键词
膨胀性介质/充填裂隙/本构关系/单轴压缩/倒圣维南体Key words
expansive media/ filled fracture/ constitutive relation/ uniaxial compression/ inverted Saint-Venant body分类
建筑与水利引用本文复制引用
陈金刚,徐平,张龚,李亚帮..膨胀性充填裂隙峰前本构关系实验研究[J].岩土力学,2011,32(10):2998-3002,5.基金项目
国家自然科学基金资助项目(No.50709030,No.51008286) （No.50709030,No.51008286）
郑州大学国家大学生创新性实验资助项目(No.091045927). （No.091045927）
