[1]黄海宁,巨能攀,黄健,等.郑万高铁宜万段边坡危岩崩落破坏特征[J].水文地质工程地质,2020,47(3):164-172.[doi:10.16030/j.cnki.issn.1000 -3665.201906053]
 HUANG Haining,JU Nengpan,HUANG Jian,et al.Caving failure characteristic of slope rockfall on Yiwan section of the Zhengzhou—Wanzhou high -speed railway[J].Hydrogeology & Engineering Geology,2020,47(3):164-172.[doi:10.16030/j.cnki.issn.1000 -3665.201906053]
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郑万高铁宜万段边坡危岩崩落破坏特征()
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《水文地质工程地质》[ISSN:1000-3665/CN:11-2202/P]

卷:
47卷
期数:
2020年3期
页码:
164-172
栏目:
环 境 地 质
出版日期:
2020-05-15

文章信息/Info

Title:
Caving failure characteristic of slope rockfall on Yiwan section of the Zhengzhou—Wanzhou high -speed railway
文章编号:
1000 -3665(2020)03 -0164 -09
作者:
黄海宁巨能攀黄健张成强
成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川 成都610059
Author(s):
HUANG Haining JU Nengpan HUANG Jian ZHANG Chengqiang
State Key Laboratory of Geo -hazard Prevention and Geo -environment Protection, Chengdu University of Technology, Chengdu, Sichuang610059,China
关键词:
危岩边坡岩体结构崩落破坏模式郑万高铁
Keywords:
rockfall slope rock mass structure caving failure model Zhengzhou -Wanzhou high -speed railway
分类号:
P642.21
DOI:
10.16030/j.cnki.issn.1000 -3665.201906053
摘要:
危岩是山区常见的地质灾害之一。以往研究缺少对危岩整体破坏导致危岩解体方面的关注,而危岩在失稳崩落过程中的解体行为却是预测危岩影响范围和防治成效的关键所在。为此,文章以郑万(郑州—万州)高铁宜万段沿线隧道洞口边坡危岩为研究对象,从结构面角度出发,对危岩崩落破坏特征进行研究。通过对15个隧道洞口边坡的调查,首先从边坡坡度、岩性组合、相对高差三个方面总结了研究区危岩发育分布规律;然后根据边坡岩体结构特征,分析了危岩失稳模式,并基于边坡上部危岩和下部落石的体积和形状对应关系,进一步探讨了边坡危岩崩落破坏演化过程;在此基础上,利用Rockfall模拟软件对落石运动特征进行预测分析。结果表明:(1)研究区边坡呈上陡下缓地形,上部基岩裸露,坡度基本上≥70°;危岩主要发育于弱风化的灰岩和白云岩中;边坡高差在150~300 m之间。(2)边坡上部危岩将呈阶梯状方式逐渐沿基底结构面滑移或者沿后缘结构面拉裂坠落。(3)研究区危岩崩落破坏模式主要为边坡上部岩体沿结构面解体破坏。(4)大部分隧道洞口边坡落石危险性较大,严重威胁隧道洞口的安全,需要采取相应的防治措施。研究成果可为在建的郑万高铁宜万段隧道边坡危岩的有效防治提供参考。
Abstract:
Because of the complex geological environment in mountainous area, rockfall has become one of the common geological hazards, and it is also the weak link of research. Previous studies have analyzed and discussed many aspects of rockfall. However, the research on the problem of rockfall disintegration caused by the whole failure of rockfall has been neglected. The disaggregation behavior of rockfall in the process of instability is the key to predict the influence range and control effect of rockfall. Therefore, this paper takes the rockfall of tunnel portal slope along Yiwan section of Zhengzhou—Wanzhou high -speed railway as the research object. From the point of view of structural plane, the caving failure characteristics of slope rockfall are examined. Based on the investigation of 15 tunnel portal slopes, the development and distribution laws of rockfall in the study area are firstly summarized from three aspects: slope gradient, lithological association and height difference. Then, according to the structural characteristics of slope rockf mass, the failure modes of rockfall are analyzed. Based on the corresponding relationship between the volume and shape of the upper dangerous rock and the lower falling rocks of the slope, the caving failure evolution process of the slope rockfall is further discussed, the motion features of the rockfalls are finally predicted and analyzed with the simulation software Rockfall. The results show that (1) the upper part of the slope is steep and the lower part is gentle in the study area. The upper bedrock is bare and the slope gradient is basically over 70°. Dangerous rocks are mainly developed in weakly weathered limestone and dolomite. Slope height difference is between 150 and 300 m. (2) Dangerous rock in the upper slope will gradually slide along the basal sliding plane or fall along the tension crack in a stepped mode. (3) The main caving damage mode of slope rockfall in the study area is that the rock masses in the upper slope disaggregate along the structural planes. (4) The rockfalls at most tunnel entrance slopes are highly dangerous. These dangerous rocks may threaten the safety of tunnel entrance. Therefore, it is essential to take appropriate measures for prevention and cure. The research results can provide reference for effective prevention and control of dangerous rock in Yiwan section of Zhengzhou -Wanzhou high -speed railway tunnels under construction.

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备注/Memo

备注/Memo:
收稿日期: 2019 -06 -23; 修订日期: 2019 -10 -25
基金项目: 中铁二院工程集团有限公司科研项目(科2017 -15)
第一作者: 黄海宁(1995 -),男,硕士研究生,主要从事地质灾害防治研究。E -mail: 1246953821@qq.com
通讯作者: 巨能攀(1973 -),男,教授,博导,主要从事地质工程和岩土工程教学和科研工作。E -mail: jnp@cdut.edu.cn
更新日期/Last Update: 2020-05-15