考虑岩体开挖卸荷边坡岩体质量评价

›› 2008, Vol. 29 ›› Issue (10): 2741-2746.

考虑岩体开挖卸荷边坡岩体质量评价

王瑞红^{1, 2}，李建林²，蒋昱州³，王乐华²，李红心²

1.武汉大学水利水电学院，武汉 430071；2.三峡大学三峡库区地质灾害教育部重点实验室，宜昌 443002； 3.河海大学岩土工程科学研究所，南京 210098

收稿日期:2006-12-11 出版日期:2008-10-10 发布日期:2013-08-03
作者简介:王瑞红，女，1981年生，博士研究生，主要从事边坡岩体开挖卸荷力学特性方面的研究
基金资助:
国家自然科学基金项目（No: 90610029）

Quality evaluation of unloaded slope rock mass

WANG Rui-hong^{1, 2}, LI Jian-lin², JIANG Yu-zhou³, WANG Le-hua², LI Hong-xin²

1. School of Water Resources and Hydropower, Wuhan University, Wuhan 430072, China; 2. Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University, Yichang 443002, China; 3. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China

Received:2006-12-11 Online:2008-10-10 Published:2013-08-03

摘要/Abstract

摘要： 正确评价开挖后岩体质量并对其进行分类，对研究岩石边坡开挖卸荷后的稳定性有十分重要的意义。以某水电站坝肩高边坡开挖工程为背景，运用卸荷岩体力学的理论与方法，对坝肩边坡开挖岩体进行三维有限元分析。根据边坡岩体开挖后应力应变场的动态变化情况，确定岩体开挖卸荷后质量损伤劣化程度，并根据岩体开挖卸荷后的力学参数，采用RMR法对开挖后的边坡岩体质量进行评价。结果表明，边坡岩体RMR值随开挖后卸荷量的增大基本呈线性递减趋势，进而考虑开挖卸荷影响因素，修正了RMR法中的评价参数，为以后用该法评价开挖后的岩体质量提供参考。

关键词: 开挖, 动态卸荷, 岩体质量评价, 稳定性分析, RMR值

Abstract: Rock mass quality has great influence on rock slope stability. So it is very important and necessary to re-classify the rock mass and evaluate its quality correctly after excavation. Based on the unloading rock mass mechanics theory, the arch dam abutment excavated high slope of one power station is analyzed by finite element method. Comparing initial stress field with excavation stress field, the rock mass unloading degree is studied; and then the degree of rock mass quality deterioration after excavation is also gained. With the progress of excavation, areas and degree of unloading change constantly. In order to simulate the influence of dynamic unloading, the rock mass mechanical parameters are adjusted continually according to the changing areas and degree of unloading after every excavation step. And considering the effects of excavation and unloading, the rock mass quality is re-evaluated with RMR method according to the rock mass mechanical parameters after excavation. The results show that the RMR value of slope rock decreases linearly with the increase of unloading degree. On the basis of the relationship between RMR value and unloading degree, considering unloading as an important influential factor, the evaluating parameters of the RMR method are revised, which has referential value for rock mass quality evaluation after excavation.

Key words: excavation, dynamic unloading, rock mass quality evaluation, stability analysis, RMR

中图分类号:

TU 452

王瑞红，李建林，蒋昱州，王乐华，李红心 . 考虑岩体开挖卸荷边坡岩体质量评价[J]. , 2008, 29(10): 2741-2746.

WANG Rui-hong , LI Jian-lin , JIANG Yu-zhou , WANG Le-hua , LI Hong-xin . Quality evaluation of unloaded slope rock mass[J]. , 2008, 29(10): 2741-2746.

参考文献

相关文章 15

[1]	张坤勇, 臧振君, 李威, 文德宝, Charkley Frederick Nai, . 土体三维卸荷弹塑性模型及其试验验证[J]. 岩土力学, 2019, 40(4): 1313-1323.
[2]	康燕飞, 陈结, 姜德义, 刘伟, 范金洋, 吴斐, 蒋昌奇, . 不同温度条件下盐岩卤水浸泡后损伤自恢复特性[J]. 岩土力学, 2019, 40(2): 601-609.
[3]	吴昌将, 孙召花, 赖允瑾, 包华, . 软土地区地下连续墙深大基坑的变形性状研究[J]. 岩土力学, 2018, 39(S2): 245-253.
[4]	张骁, 肖军华, 农兴中, 郭佳奇, 吴楠, . 基于HS-Small模型的基坑近接桥桩开挖变形影响区研究[J]. 岩土力学, 2018, 39(S2): 263-273.
[5]	王克忠, 金志豪, 杨麦珍, 刘先亮, 刘华, . 取水塔基坑开挖过程倒悬岩坎围堰渗透稳定性研究[J]. 岩土力学, 2018, 39(S2): 415-422.
[6]	刘美麟，侯艳娟，张顶立，房倩. 砂土地层中考虑基坑施工效应的柔性挡墙主动土压力研究[J]. , 2018, 39(S1): 149-158.
[7]	侯公羽，李小瑞，梁洪垚，梁金平，周蒙辉，崔永科，. 高强石膏材料配比研究及其在围岩试件(厚壁圆筒) 开挖卸荷试验中的应用[J]. , 2018, 39(S1): 159-166.
[8]	李海丽，张陈蓉，卢恺,. 隧道开挖条件下地埋管线的非线性响应分析[J]. , 2018, 39(S1): 289-296.
[9]	秦雨樵，汤华，冯振洋，尹小涛，王东英, . 基于聚类分析的边坡稳定性研究[J]. , 2018, 39(8): 2977-2983.
[10]	程红战，陈健，胡之锋，黄珏皓, . 考虑砂土抗剪强度空间变异性的盾构开挖面稳定性分析[J]. , 2018, 39(8): 3047-3054.
[11]	张玉伟，谢永利，翁木生，. 非对称基坑开挖对下卧地铁隧道影响的离心试验[J]. , 2018, 39(7): 2555-2562.
[12]	李清川，李术才，王汉鹏，张红军，张冰，张玉强,. 上覆流沙层隧道开挖面稳定性分析与数值试验研究[J]. , 2018, 39(7): 2681-2690.
[13]	张海涛，罗先启，沈辉，毕金锋. 基于矢量和的滑面应力抗滑稳定分析方法[J]. , 2018, 39(5): 1691-1698.
[14]	周泽林，陈寿根，涂鹏，张海生, . 基坑开挖对邻近隧道影响的耦合分析方法[J]. , 2018, 39(4): 1440-1449.
[15]	赵金帅，冯夏庭，江权，陈炳瑞，肖亚勋，胡磊，丰光亮，李鹏翔，. 分幅开挖方式下高应力硬岩地下洞室的微震特性及稳定性分析[J]. , 2018, 39(3): 1020-1026.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed