Establishment of shear-flow coupling test and GIS numerical model of rock joint

岩石节理剪流耦合试验及GIS数值模型的建立

基本信息

批准号：
17360433
负责人：
ESAKI Tetsuro
金额：
$ 8.77万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

1. Shear-flow testing apparatus of rock joint has been developed and accomplished for its procedure of operation. By controlling the two jacks, normal stress is applied under shearing despite the irregular rock joint shape. The coupling test is conducted by allowing water to flow through the injection hole of the lower specimen.2. By using the apparatus developed, the normal stress control test and the normal displacement control test that is the keeping of parallel condition of discontinuities, has been successfully accomplished with permeability test simultaneously. The water is then allowed to flow out to the edge through an aperture. After flowing over the labyrinth gate, water flow rate is automatically measured. At a normal stress of 0.3MPa, the peak shear is clearly shown, but at other normal stress stages, it does not appear. It also shows that with increasing the normal stress, residual shear stress increases. The dilation occurred until 0.6MPa of normal stress. After that, the normal displacement is gradually decreasing. At a normal stress of 0.3MPa, the hydraulic conductivity rapidly increases to about 2 orders of magnitude with increasing shear displacement.3. 3D asperities of discontinuities has been measured by laser profile apparatus and presented the 3D discontinuity distribution map during shear-flow coupling test. The simulation of shear-flow coupling process of rock joint is faithfully carried out and gotten the characteristics of the behavior of joint.

1、开发并完成了岩石节理剪切流试验装置的操作流程。通过控制两个千斤顶，尽管岩石节理形状不规则，但仍会在剪切下施加法向应力。耦合试验是通过让水流过下试件的注入孔来进行的。2．利用所研制的装置，成功地完成了法向应力控制试验和保持间断平行条件的法向位移控制试验，并与渗透率试验同时进行。然后让水通过一个孔流出到边缘。水流过迷宫闸门后，自动测量水流量。在0.3MPa法向应力下，峰值剪切清晰可见，但在其他法向应力阶段则不出现。它还表明，随着法向应力的增加，残余剪切应力也增加。膨胀发生直到0.6MPa的法向应力。此后，正常位移逐渐减小。在0.3MPa法向应力下，随着剪切位移的增加，导水率迅速增加到2个数量级左右。3．采用激光轮廓仪测量了不连续性的3D粗糙度，并给出了剪切流耦合测试过程中的3D不连续性分布图。忠实地进行了岩石节理剪流耦合过程的模拟，得到了节理的行为特征。