Research on fissures network of jointed rock masses in one section of Three Gorges Reservoir

RONG Guan; ZHOU Chuang-bing; ZHU Huan-chun; LIU You-rong

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Research on fissures network of jointed rock masses in one section of Three Gorges Reservoir

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- Research on fissures network of jointed rock masses in one section of Three Gorges Reservoir
- Vol. 25, Issue 7期　刊出日, (2004)
- 作者机构：
  
  1. 武汉大学水利水电学院,湖北,武汉,430072
  2. 中国地质大学工程学院,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：18 July 2014，
  
  Published：2004
- 稿件说明：
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RONG Guan, ZHOU Chuang-bing, ZHU Huan-chun, et al. Research on fissures network of jointed rock masses in one section of Three Gorges Reservoir[J]. 2004, 25(7期　刊出日).
DOI：

RONG Guan, ZHOU Chuang-bing, ZHU Huan-chun, et al. Research on fissures network of jointed rock masses in one section of Three Gorges Reservoir[J]. 2004, 25(7期　刊出日). DOI：

摘要

为合理评价三峡水库某库岸岩体结构特征及工程整治提供依据，对区内岩体进行了裂隙调查及网络模拟研究。研究基于Monte-Carlo模拟方法，在技术上进行了探讨和一定改进。如采用了聚类分析法确定裂隙优势产状、用直接法产生随机数、广义RQD t及裂隙线连通率的计算等。根据野外调查及计算机模拟研究，研究区发育有3组优势裂隙、平均迹长1.45 m左右。间距一般服从对数正态或负指数分布，而走向和迹长基本上不服从常规分布。裂隙线密度在3－6条/m、t = 0.1 m时RQD t值在90 %左右、t = 0.7 m时RQD t值为10 %－20 %、RQD t值变化可能影响库岸岩体在不同方向的稳定性。

Abstract

In order to rationally evaluate engineering properties of rock masses in one section of the Three Gorges Reservoir and provide method for harnessing geological hazards

the probable patterns of discontinuities were calculated and joints network were simulated with the aid of the Monte-Carlo method on basis of surveying data of discontinuities. Some technical improvement were proposed. There are cluster analysis for classing discontinuity groups

direct method to form joint random numbers

calculation of generalized RQDt and line connection rate. According to surveyed and simulated results

there are 3 sets preponderant discontinuities in research section

and the average trace length is about 1.45m

line density of discontinuities is 3－6 sets every metre. when t = 0.10 m and 0.70m

the value of RQDt is 90 % and 10 % － 20 % respectively

and the varying of RQDt along different orientations will affect stability of bank slope.

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