长江三峡工程蓄水对链子崖危岩体T<sub>8</sub>—T<sub>12</sub>缝段稳定性影响研究

胡亚波; 黄学斌

长江三峡工程蓄水对链子崖危岩体T₈—T₁₂缝段稳定性影响研究

胡亚波^{1, 2},
黄学斌³

1.
中国地质大学工程学院, 湖北武汉 430074
2.
湖北省地质环境总站, 湖北武汉 430051
3.
国土资源部长江三峡库区地质灾害监测防治工作指挥部, 湖北宜昌 443000

基金项目: 国土资源部环境岩土技术开放研究重点实验室项目; 国土资源部定向科研项目“长江三峡链子崖危岩体防治工程研究”

详细信息

作者简介:
胡亚波(1970-), 男, 湖北省地质环境总站副站长, 中国地质大学在读博士研究生, 主要从事工程地质和地质灾害研究工作

中图分类号: P694;P642.22
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出版历程
- 收稿日期: 2001-04-23
- 刊出日期: 2002-03-25

Effect of the Three Gorges Project Storing on Stability of T₈-T₁₂ Fracture Segment of Hazardous Rocks in Lianziya

HU Ya-bo^{1, 2},
HUANG Xue-bin³

1.
Engineering Faculty, China University of Geosciences, Wuhan 430074, China
2.
Center of Geology Environment of Hubei Province, Wuhan 430051, China
3.
Headquarter of Geological Disaster Monitoring & Control of the Three Gorges Reservior, Yichang 443000, China

摘要

摘要: 三峡水库蓄水后, 已治理的链子崖危岩体, 特别是T₈—T₁₂缝段岩体将受到江水的长期作用和影响, 直接关系到防治工程的成败.通过大量实地调查和岩体测试, 着重论述水库蓄水对T₈—T₁₂裂缝及其充填物的作用和影响; 并以此为基础, 用改进的Sarma法对该段危岩体的稳定性进行重新计算和评价, 得出一系列新的结论: 总体上, 长江水位抬升后, 水对裂缝的溶蚀作用和劈裂作用, 使裂缝整体加宽, 不利于危岩体的稳定; 考虑岩体和承重阻滑键取长期强度和江水位骤然升降, 以及地震影响, 链子崖危岩体整体稳定性将恶化, 但NE20°方向稳定程度好于NW 35 0°.
- 三峡工程 /
- 蓄水 /
- 稳定性 /
- 防治工程
Abstract: The controlled Lianziya hazardous rock, especially T₈-T₁₂ fracture segment will be affected over a long period of time when the Three Gorges reservoir stores water, which also relates to efficacy of the control project to the rock. Through mass field investigations and rock tests, this paper concerns with the long term effects of the reservoir to T₈-T₁₂ fracture segment and its deposits, and also recalculates the stability of the rock by using improved Sarma program. Then some new conclusions are obtained: generally, when the water level of Yangtze River rises, the water actions of erosion and tension will widen the fractures, and deteriorate the rock stability. On considering long term strengths of rock and control project, as well as rapid water rising and dropping, and also earthquake affection, the stability of hazardous rock will turn worse than before, whereas the condition in NE20° direction will be better than that in NW350°.
- the Three Gorges Project /
- storing /
- stability /
- control project.

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图 1 链子崖危岩体T₈—T₁₂缝段稳定性计算剖面

Fig. 1. Profile for stability calculation of T₈—T₁₂ segment

下载: 全尺寸图片幻灯片

表 1 裂缝充水静水压力计算值

Table 1. Calculated values of hydrostatic pressure in fractures

表 2 裂缝中段应力强度因子计算值

Table 2. Calculated values of stress intensity factor in mid-segment of fractures

表 3 危岩体稳定性评价计算参数取值表

Table 3. Calculation parameters for stability appraise of hazardous rock

表 4 NW350°方向和NE20°方向稳定系数K计算结果

Table 4. Stability coefficient K of NW350° and NE20°

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