作　　者： ; ; ; ;

机构地区： 长崎大学

出　　处： 《岩石力学与工程学报》 2007年第11期2253-2259,共7页

摘　　要： 节理岩体内渗流的发生主要是通过断裂节理网络产生,节理面的几何特性和受力特征决定和影响着节理裂隙的渗透性质,从而极大地影响着水下隧道及地下硐室中的渗流。应用自行研制开发的试验设备(岩石节理单一剪切-渗流试验机(SMT-E-4010)),在恒定法向荷载和恒定法向刚度的边界条件下,对不同接触状态下的岩石断裂节理试件分别进行一系列节理的剪切渗流耦合试验,研究剪切过程中力学性质、水力学性质的变化情况;同时,结合立方准则对试验数据进行分析讨论。试验结果表明:节理力学性质,水力开度和透过率在剪切过程中呈现出两阶段的变化性质。 Owing to the long-term geological processes, there are all sorts of discontinuities such as joints in the rockmass. In the jointed rock, the fluid flows are dictated mainly through the passage of the discontinuities. Under the current increased environmental and regulatory controls, the accurate prediction of total inflow to the tunnel excavation is significant factors in the design and construction stages of the underwater tunnel. The surface roughness of discontinuities in rock masses is an important factor to analyze the mechanical and hydraulic characteristics of rock joints. The hydro-mechanical behaviors and properties of rock joints are usually determined by laboratory experiments on fracture specimens. Laboratory testing of rock fractures involves a number of technical issues that may have significant impacts on the reliability and applicability of the testing results; for example, the quantitative estimation of the evolutions of hydraulic transmissivity fields of fractures during shear under different normal constraint conditions, and the sealing techniques when fluid flow during shear is involved, In this study, a new hydro-mechanical test apparatus for rock joint is developed. The surfaces of rock joints are measured before shear by using a 3D laser scanning profilometer system. Thus, a number of shear-flow coupling tests were carried out on three kinds of rock fracture specimens under constant normal load（CNL） or constant normal stiffness（CNS） constraint to evaluate the influences of morphological properties of rock fractures on their hydro-mechanical behaviors. Combined with the cubic law for fluid flow, the test results are analyzed and discussed; and some conclusions about the tests are drawn.

关 键 词： 岩石力学 节理 剪切渗流耦合试验 水力开度 透过率

领　　域： [建筑科学] [建筑科学]