四川宝兴张家沟危岩体稳定性及运动学分析

陈锡锐; 刘虹强; 杨剑红; 艾其凯; 钟波; 蔡国军

doi:10.16031/j.cnki.issn.1003-8035.202209043

四川宝兴张家沟危岩体稳定性及运动学分析

doi: 10.16031/j.cnki.issn.1003-8035.202209043

陈锡锐^{1, 3,},
刘虹强^1, ,,
杨剑红¹,
艾其凯²,
钟波²,
蔡国军³

1.
四川省地质矿产勘查开发局区域地质调查队，四川成都　610213
2.
中国建筑材料工业地质勘查中心四川总队302分队，四川乐山　614299
3.
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

基金项目: 国家重点实验室自主课题（SKLGP2019Z017）、四川省科技计划（No.2019YJ0403）

详细信息

作者简介:
陈锡锐（1997-），男，助理工程师，硕士，主要从事地质工程与岩土工程方面研究工作。E-mail：719039252@qq.com

通讯作者:
刘虹强（1983-），男，高级工程师，硕士，主要从事水工环相关研究。E-mail：93053219@qq.com

中图分类号: P462.22
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出版历程
- 收稿日期: 2022-09-27
- 录用日期: 2023-04-21
- 修回日期: 2023-01-31
- 网络出版日期: 2023-04-26

Analysis of stability and kinematics of the dangerous rock mass in Zhangjiagou, Baoxing, Sichuan Province

1.
Regional geological survey team of Sichuan Bureau of Geology and Mineral Exploration and Development, Chengdu, Sichuan　610213
2.
Sichuan Brigade 302 Branch, China Construction Material Industry Geological Exploration Center, Leshan, Sichuan　614299
3.
State Key Laboratory of Geological Disaster Prevention and Geological Environment Protection, Chengdu University of Technology, Chengdu, Sichuan　610059

摘要

摘要: 张家沟危岩体于“6·1”芦山地震后被发现，稳定性差，严重威胁下方居民生命财产安全。基于稳定性计算及离散元数值分析方法对危岩体进行评价，选取稳定性最差的地震工况进行运动学分析，在上述研究基础上结合解析解与数值解成果设计相应防护措施。主要结论有：（1）张家沟危岩体结构破碎，发育顺坡向控制性结构面，破坏模式为滑移式；（2）稳定性计算与数值模拟结果皆表明张家沟危岩体在天然、暴雨、地震工况下均会失稳，其中地震工况下运动距离最长；（3）地震工况下危岩体的破坏模式为震裂—滑移式，运动过程中块石以滑移为主，跳高较小，同时坡面形态显著影响着落石运动特征；（4）落石间相互碰撞挤压会改变其运动特征及冲击动能大小，在一定程度上可增加其致灾范围。成果可为类似灾害防治提供参考。
- 滑移式崩塌 /
- 稳定性评价 /
- 离散元 /
- 运动特征 /
- 防治措施
Abstract: After the “6·1” Lushan earthquake, unstable rock mass was discovered in Zhangjiagou, posing a severe threat to the safety of the residents and their property below. The dangerous rock mass was evaluated using stability calculation and the discrete element numerical analysis method, and the seismic condition with the highest threat level was selected for kinematic analysis. Based on this research, a combination of analytical solution and numerical solution was used to design corresponding protective measures. The main conclusions are as follows : (1) The structure of the unstable rock mass in Zhangjiagou is broken, and a controlling structural plane is developed along the slope. (2) The stability calculations and numerical simulations show that the Zhangjiagou unstable rock mass will become unstable under natural, rainstorm and seismic conditions, with the longest movement distance occurring during an earthquake. (3) The failure mode of the dangerous rock mass under seismic conditions is a shatter-slip type, where the rock mainly slips during movement, and the jump height is small. Additionally, the slope shape significantly affects the characteristics of rockfall movement. (4) The collision and extrusion between rockfalls can change their motion characteristics and impact kinetic energy, potentially increasing the scope of the disaster. The research results can provide a reference for similar disaster prevention and control efforts.
- sliding collapse /
- stability evaluation /
- discrete element /
- movement characteristics /
- prevention method

HTML全文

图 1 张家沟危岩体全貌图

Figure 1. Overview map of the Zhangjiagou dangerous rock mass

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图 2 张家沟危岩体剖面图

Figure 2. Cross-sectional diagram of the Zhangjiagou dangerous rock mass

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图 3 斜坡前部东河

Figure 3. Aerial view of the East River area at the front of the slope

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图 4 危岩体赤平投影

Figure 4. Stereographic projection of the Zhangjiagou dangerous rock mass

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图 5 张家沟危岩体数值计算模型

Figure 5. Numerical calculation model of the Zhangjiagou dangerous rock mass

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图 6 三种工况下危岩体总位移云图

Figure 6. Total displacement nephogram of the dangerous rock mass under three working conditions

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图 7 地震工况下张家沟危岩体运动特征

Figure 7. Movement characteristics of the Zhangjiagou dangerous rock mass under seismic working condition

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图 8 监测点水平与竖直位移曲线

Figure 8. Horizontal and vertical displacement curves of the monitoring points

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图 9 监测点速度与水平位移曲线图

Figure 9. Monitoring point velocity and horizontal displacement curve

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图 10 落石冲击动能与水平位移关系曲线

Figure 10. Relationship curve between the kinetic energy of rockfall impact and horizontal displacement

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图 11 既有拦石墙被摧毁

Figure 11. Site photo of destroyed existing barricade wall

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图 12 拦石墙拦挡效果模拟

Figure 12. Simulation of the blocking effect of the rockfall protection retaining wall

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表 1 岩体力学基本参数取值（天然）

Table 1. Fundamental mechanical parameters of rock mass (natural)

岩性	密度/（kg/m³）	节理刚度/（MPa）	内摩擦角/（°）	粘聚力/（MPa）
花岗岩	2750		47.5	11.2
基岩	2960		58.2	15.7
L1		2.2	30.5	0.8
L2		2.2	24.9	0.6
L3		2.2	25.3	0.7

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表 2 稳定性计算参数选取

Table 2. Selection of calculation parameters for stability analysis

计算工况	重度（Kn/m³）	后缘陡倾裂隙深度h（m）	裂隙或滑面充水高度hw（m）	滑面长度 l（m）	裂隙水压力 V（Kn/m）	软弱结构面倾角$ \theta $ （ °）	地震水平系数ζe	结构面综合粘聚力$ c $ （Mpa）	结构面综合内摩擦角（°）
天然	26.95	6.68	1.96	25.32	19.2	45	0	0.65	31
暴雨	27.45	6.68	2.25	25.32	25.3	45	0	0.61	27
地震	26.95	6.68	1.96	25.32	19.2	45	0.16	0.65	31

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表 3 稳定性计算结果

Table 3. Stability analysis calculation results

计算工况	破坏模式	稳定性系数k	稳定状态
天然	滑移式	1.18	欠稳定
暴雨	滑移式	1.00	欠稳定
地震	滑移式	0.93	欠稳定

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参考文献(26)

[1]	张倬元, 王士天, 王兰生. 工程地质分析原理[M]. 4版. 北京: 地质出版社, 2016: 1-5 ZHANG Zhuoyuan, WANG Shitian, WANG Lansheng. Principles of engineering geological analysis[M]. 4th ed. Beijing: Geological Publishing House, 2016: 1-5. （in Chinese with English abstract）
[2]	ASHWOOD W,HUNGR O. Estimating total resisting force in flexible barrier impacted by a granular avalanche using physical and numerical modeling[J]. Canadian Geotechnical Journal,2016,53(10):1700 − 1717. doi: 10.1139/cgj-2015-0481
[3]	FAN X M,SCARINGI G,KORUP O,et al. Earthquake-induced chains of geologic hazards:patterns,mechanisms,and impacts[J]. Reviews of Geophysics,2019,57(2):421 − 503. doi: 10.1029/2018RG000626
[4]	梅雪峰. 落石冲击荷载作用下的桩板拦石墙-缓冲层组合结构动力响应[D]. 成都: 西南交通大学, MEI Xuefeng. Dynamic response of pile-sheet retaining wall with cushion layer under rockfall impact[D]. Chengdu: Southwest Jiaotong University, . （in Chinese with English abstract）
[5]	尹迪,董培育,曹建玲,等. 川滇地区地震危险性数值分析[J]. 地球物理学报,2022,65(5):1612 − 1627. [YIN Di,DONG Peiyu,CAO Jianling,et al. Numerical analysis of the seismic hazard in Sichuan-Yunnan region[J]. Chinese Journal of Geophysics,2022,65(5):1612 − 1627. (in Chinese with English abstract)
[6]	MAERZ N H. New risk-consequence rockfall hazard rating system for Missouri highways using digital image analysis[J]. Environmental and Engineering Geoscience,2005,11(3):229 − 249. doi: 10.2113/11.3.229
[7]	Budeta P, Luca. Nlapil MA 2016. Quntitatve Rockal isk Assessmentfor an lmportant Road by lMfeans of the Rockell isk Mlanagement （RO. MA）Metiod Buletn of Engineenng Geology and the Environment, 75（4）: 1377-1397.
[8]	杨志法,尚彦军,刘英. 关于岩土工程类比法的研究[J]. 工程地质学报,1997,5(4):299 − 305. [YANG Z F,SHANG Y J,LIU Y. Study on the analogism in geotechnical engineering[J]. Journal of Engineering Geology,1997,5(4):299 − 305. (in Chinese with English abstract)
[9]	王玉锁,杨国柱. 隧道洞口段危岩落石风险评估[J]. 现代隧道技术,2010,47(6):33 − 39. [WANG Yusuo,YANG Guozhu. Rockfall risk assessment for a tunnel portal section[J]. Modern Tunnelling Technology,2010,47(6):33 − 39. (in Chinese with English abstract)
[10]	王新民,康虔,秦健春,等. 层次分析法-可拓学模型在岩质边坡稳定性安全评价中的应用[J]. 中南大学学报(自然科学版),2013,44(6):2455 − 2462. [WANG Xinmin,KANG Qian,QIN Jianchun,et al. Application of AHP-extenics model to safety evaluation of rock slope stability[J]. Journal of Central South University (Science and Technology),2013,44(6):2455 − 2462. (in Chinese with English abstract)
[11]	刘贺军,吴玉涛,李晓乐,等. 河北阜平县石滩地村危岩体变形破坏模式及稳定性分析[J]. 中国地质灾害与防治学报,2018,29(4):50 − 57. [LIU Hejun,WU Yutao,LI Xiaole,et al. Deformation failure mode and stability analysis of dangerous rock mass in Shitandi Village,Fuping County of Hebei Province[J]. The Chinese Journal of Geological Hazard and Control,2018,29(4):50 − 57. (in Chinese with English abstract)
[12]	邬爱清. 基于关键块体理论的岩体稳定性分析方法及其在三峡工程中的应用[J]. 长江科学院院报,2019,36(2):1 − 7. [WU Aiqing. Series methods of analyzing rock mass stability based on key block theory and their applications to Three Gorges Project[J]. Journal of Yangtze River Scientific Research Institute,2019,36(2):1 − 7. (in Chinese with English abstract)
[13]	陈宙翔,叶咸,张文波,等. 基于无人机倾斜摄影的强震区公路高位危岩崩塌形成机制及稳定性评价[J]. 地震工程学报,2019,41(1):257 − 267. [CHEN Zhouxiang,YE Xian,ZHANG Wenbo,et al. Formation mechanism analysis and stability evaluation of dangerous rock collapses based on the oblique photography by unmanned aerial vehicles[J]. China Earthquake Engineering Journal,2019,41(1):257 − 267. (in Chinese with English abstract)
[14]	马显东, 周剑, 张路青, 等. 强震区公路沿线崩塌危岩体特征提取及失稳分析[J]. 岩石力学与工程学报, 2022, 41（增刊1）: 2901 − 2914 MA Xiandong, ZHOU Jian, ZHANG Luqing, et al. Feature extraction and instability analysis of dangerous rock mass along highway in meizoseismal areas[J]. Chinese Journal of Rock Mechanics and Engineering, 2022, 41（Sup 1）: 2901 − 2914. （in Chinese with English abstract）
[15]	刘宝臣,王良玉,曾榕,等. 桂林翻山危岩稳定性评价的离散元分析[J]. 科学技术与工程,2022,22(6):2409 − 2418. [LIU Baochen,WANG Liangyu,ZENG Rong,et al. Discrete element analysis of stability evaluation of Guilin Fanshan dangerous rock[J]. Science Technology and Engineering,2022,22(6):2409 − 2418. (in Chinese with English abstract) doi: 10.3969/j.issn.1671-1815.2022.06.034
[16]	刘国阳,孟海怡,宁宝宽,等. 基于三维非连续变形分析的巨石崩塌运动研究[J]. 岩土力学,2022,43(1):246 − 256. [LIU Guoyang,MENG Haiyi,NING Baokuan,et al. Study on collapse and movement of a boulder based on 3D discontinuous deformation analysis[J]. Rock and Soil Mechanics,2022,43(1):246 − 256. (in Chinese with English abstract)
[17]	王朋,贾洪彪,马淑芝,等. 梳妆台危岩体稳定性评价及落石运动特征研究[J]. 安全与环境工程,2022,29(4):139 − 146. [WANG Peng,JIA Hongbiao,MA Shuzhi,et al. Stability evaluation of dangerous rock mass in dressing table and study on characteristics of rockfall movement[J]. Safety and Environmental Engineering,2022,29(4):139 − 146. (in Chinese)
[18]	张青宇,唐世明,沈军辉. 四川麻柳沟地震崩塌落石运动特征分析[J]. 人民长江,2015,46(13):39 − 41. [ZHANG Qingyu,TANG Shiming,SHEN Junhui. Analysis of movement characteristics of collapse rockfall in Maliugou earthquake[J]. Yangtze River,2015,46(13):39 − 41. (in Chinese with English abstract)
[19]	王栋,王剑锋,李天斌,等. 西南山区某铁路隧道口高位落石三维运动特征分析[J]. 地质力学学报,2021,27(1):96 − 104. [WANG Dong,WANG Jianfeng,LI Tianbin,et al. Analysis of three-dimensional movement characteristics of rockfall:a case study at a railway tunnel entrance in the southwestern mountainous area,China[J]. Journal of Geomechanics,2021,27(1):96 − 104. (in Chinese with English abstract)
[20]	李源亮,郭阿龙. 高风险落石运动分析及边坡防护综合设计[J]. 长江科学院院报,2022,39(9):65 − 70. [LI Yuanliang,GUO Along. Analysis of highly risky rockfall movement and comprehensive design of slope protection[J]. Journal of Yangtze River Scientific Research Institute,2022,39(9):65 − 70. (in Chinese with English abstract)
[21]	柳万里,晏鄂川,魏鹏飞,等. 落石运动特征试验及影响因素敏感性分析[J]. 山地学报,2021,39(1):47 − 58. [LIU Wanli,YAN Echuan,WEI Pengfei,et al. Experimental study on rockfall and sensitivity analysis of influencing factors[J]. Mountain Research,2021,39(1):47 − 58. (in Chinese with English abstract)
[22]	黎尤,何坤,胡卸文,等. 震裂山体崩塌形成特征及运动学三维模拟—以汶川县三官庙村崩塌为例[J]. 工程地质学报,2022,30(2):542 − 552. [LI Y,HE K,HU X W,et al. Formation characteristics and kinematics 3-d simulation of rockfall evolved from shattered mountain:Case study of Sanguanmiao village rockfall in Wenchuan County[J]. Journal of Engineering Geology,2022,30(2):542 − 552. (in Chinese with English abstract)
[23]	蔡国军,陈锡锐,尹保国,等. 岩体力学参数对反倾边坡稳定性影响的数值模拟研究[J]. 人民珠江,2020,41(9):25 − 31. [CAI Guojun,CHEN Xirui,YIN Baoguo,et al. Numerical simulation study on influence of rock mass mechanical parameters on stability of anti-dip slope[J]. Pearl River,2020,41(9):25 − 31. (in Chinese with English abstract)
[24]	ASTERIOU P,SAROGLOU H,TSIAMBAOS G. Geotechnical and kinematic parameters affecting the coefficients of restitution for rock fall analysis[J]. International Journal of Rock Mechanics and Mining Sciences,2012,54:103 − 113. doi: 10.1016/j.ijrmms.2012.05.029
[25]	蔡国军,陈锡锐,孙文鹏,等. 强震作用下斜坡表面放大效应的三维离散元模拟[J]. 地质科技通报,2022,41(2):104 − 112. [CAI Guojun,CHEN Xirui,SUN Wenpeng,et al. Three-dimensional discrete element simulation of the amplification effect of the slope surface under the action of strong earthquakes[J]. Bulletin of Geological Science and Technology,2022,41(2):104 − 112. (in Chinese with English abstract)
[26]	唐建辉. 隧道洞口坡面落石运动特性及冲击明洞作用机理研究[D]. 成都: 西南交通大学 TANG Jianhui. Study on movement characteristics of rockfall on the slope of tunnel portal and the mechanism of impacting open cut tunnel[D]. Chengdu: Southwest Jiaotong University. （in Chinese with English abstract）