环境侵蚀下水泥土的强度及细观破裂过程分析

研究了环境侵蚀下水泥土的细观破裂行为，利用中国科学院武汉岩土力学研究所的岩石破裂过程细观力学试验系统，对在各种侵蚀环境中侵蚀一定时间的水泥土细观试件进行了一系列破裂过程试验，实时观察并用显微数码摄像系统记录了水泥土试件的细观破裂全过程，得到了水泥土的应力-应变关系曲线及其对应显微图像。研究结果表明，环境侵蚀后水泥土的细观破坏特征主要有两类，即弹塑性破坏和脆性破坏。细观试验是研究环境侵蚀下水泥土破坏过程的有效手段。

Analysis of meso-fracture process of cemented soil under environmental erosion

In order to investigate the behaviors of cemented soil meso-cracking under environmental erosion, a series of environmental erosion tests are carried out on the basis of the rock meso-mechanics device provided by Key Laboratory of Rock and Soil Mechanics, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. The meso-fracturing process of cemented soil is real-time observed using the microscope and the digital color camera. The stress-strain curves and the corresponding micro-images of specimens are obtained. The results show that there are two types of fracturing behaviors of cemented soil under environmental erosion. That is elastoplastic failure and brittleness failure. Meanwhile, the meso- cracking tests are effective method of cemented soil in erosion environment.