【摘要】 为了分析岩石在环境侵蚀下岩石的细观破裂行为,在已有岩石细观加载仪的基础上研制了侵蚀装置和数字显微观测系统。它可通过监视器对试件表面的裂纹扩展过程进行多角度的实时全场监视和局部显微放大监视,并且可对监视到的图像进行录像和计算机自动采集。利用该系统进行了长江三峡工程永久船闸区的花岗岩在水和不同化学溶液侵蚀下的单轴压缩破裂过程试验,并观察到穿晶裂纹、绕晶裂纹以及沿晶裂纹的动态扩展全过程。更多还原

【Abstract】 In order to investigate the behaviors of rock meso-cracking under chemical erosion,a new experimental system was developed on the basis of the rock meso-mechanics device. Microfracturing process of rock under uniaxial compression can be observed using microscope and color video camera and recorded by computer. A series of water and chemical erosion tests on granite taken from permanent shiplock site of the Three Gorges Project were conducted in uniaxial compression. The meso-fracturing process of inter-granular cracking, transgranular cracking,or grain boundary cracking is real-time observed.更多还原