摘要
以长河坝电站进水口边坡岩体节理面为研究对象,采用数字近景摄影测量技术获取节理面形貌数据,并将其导入matlab生成三维节理数字高程模型。基于小波分析理论将节理面不同方向的节理迹线分离成表征其主要轮廓形状的一阶大起伏迹线和表征其次要粗糙度的二阶小凸起迹线,计算迹线的节理粗糙度系数(JRC)、研究了节理面不同构成部分的各向异性特征。研究结果显示:(1)节理迹线的一阶起伏部分与二阶凸起部分粗糙度发育优势方向不同。(2)节理面一阶起伏迹线和二阶起伏迹线均存在明显的粗糙度各向异性特征。研究结果可为节理面力学行为和渗流行为各向异性的研究提供依据。
This paper studies the anisotropic properties of the jointed rock mass at the inlet of the Changheba Power Station. The digital close-range photogrammetry technology was used to obtain the topographic information of the jointed surface and imported the information into the MATLAB to generate a three-dimensional jointed rock mass digital elevation model. Based on the wavelet analysis theory, the joint traces in different directions of the jointed surface are separated into the first-order large undulating traces that representing the main contour shape and the second-order small convex traces that representing the secondary roughness, and the joint roughness coefficient(JRC) of the traces was calculated and the anisotropy characteristics of different components of the jointed surface were studied. The results show that:(1) The first-order undulating part and the second-order convex part of the jointed trace have different roughness development dominant directions.(2) Both the first-order undulating trace and the second-order undulating trace of the joint surface have obvious roughness anisotropy. The results provide a basis for the study of the mechanical behavior of joint surfaces and the anisotropy of seepage behavior.
作者
王荣达
刘铁新
张凯
WANG Rongda;LIU Tiexin;ZHANG Kai(School of Transportation Engineering,Dalian Maritime University,Dalian 116026)
出处
《土工基础》
2022年第1期29-32,共4页
Soil Engineering and Foundation
