地震作用下康定市郭达山危岩带运动特征

doi:10.19388/j.zgdzdc.2022.04.02

Abstract
Figure/Table
References
Related Citation (1)

Download: PDF (5562 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The landforms in Kangding City are deep-cutting valley, with steep slopes and exposed bedrocks, and the falling rocks and earthquakes occurred frequently in this area. In order to carry out the study on the characte-ristics and laws of the collapse movement under the earthquake action, the researchers in this paper take rockfalls in Guoda Mountain of Kanding City as a case study and adopt the Particle Flow Code software PFC^2D to simulate the movement characteristics and failure process rockfall at different locations (boulder stone on the top of slope, catallactic rock mass on the slope, collapse accumulation in the middle of slope, block rockfall under the slope) under Ms 8.0 earthquake. The results are as following: ① The boulder stones on the top of slope with small mass are easy to be started, and the boulder stones with nearly spherical shape are easy to be capsized and rolled. The movement types after departing along the free face are falling, colliding and rolling, with the highest rate of 11.8 m/s. ② The failure process of catallactic rock mass on the slope can be divided into four stages, including extending - penetrating of fracture, starting - falling, crashing - disintegrating, and rolling - stacking. The block rock mass above the catallactic rock mass moves furthest, up to 269 m. ③ The collapse accumulation forms a debris flow from front to back, and its movement types along the slope are rolling and colliding. ④ The movement characteristics of fallrocks in the lower part of the mountain are starting, sliding, squeezing, disintegrating, re-sliding, re-squeezing and accumulating. ⑤ The collision, friction, extrusion and disintegration occurred in the collapses in different locations during movement, which quickly consumed their own kinetic energy and caused sharply dropping in distance and speed. The discrete element simulations could help refined understanding of collapse in deep-cutting valleys, which provides some scientific basis for the project management of collapse and disaster prevention in mountainous regions and cities.

Key words： Kangding City rockfall belt of Guoda Mountain movement characteristics

Received: 03 March 2022

ZTFLH:

P681.7

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	XU Wei
	ZHU Zhiming
	TIE Yongbo
	YUAN Chuanbao

Cite this article:

XU Wei,ZHU Zhiming,TIE Yongbo, et al. Movement characteristics of rockfall under earthquake in Guoda Mountain of Kangding City[J]. , 2022, 9(4): 10-18.

URL:

http://journal25.magtechjournal.com/Jwk_dzdc/EN/10.19388/j.zgdzdc.2022.04.02 OR http://journal25.magtechjournal.com/Jwk_dzdc/EN/Y2022/V9/I4/10

[1] 李秀珍,钟卫,张小刚,等.川藏交通廊道滑坡崩塌灾害对道路工程的危害方式分析[J].工程地质学报,2017,25(5):1245-1251.
Li X Z,Zhong W,Zhang X G,et al.Hazard ways of landslides and avalanches on road engineering in Sichuan-Tibet traffic corridor[J].J Eng Geol,2017,25(5):1245-1251.
[2] 杨志华,张永双,郭长宝,等.青藏高原东缘地质灾害影响因子敏感性分析[J].工程地质学报,2018,26(3):673-683.
Yang Z H,Zhang Y S,Guo C B,et al.Sensitivity analysis on causative factors of geohazards in eastern margin of Tibetan Plateau[J].J Eng Geol,2018,26(3):673-683.
[3] 裴向军,黄润秋,裴钻,等.强震触发崩塌滚石运动特征研究[J].工程地质学报,2011,19(4):498-504.
Pei X J,Huang R Q,Pei Z,et al.Analysis on the movement charateristics of rolling rock on slope caused by intensitive earth-quake[J].J Eng Geol,2011,19(4):498-504.
[4] 蔡红刚,裴向军,吴景华,等.强震抛射型崩塌滚石运动特征研究[J].长春工程学院学报:自然科学版,2011,12(3):1-4,20.
Cai H G,Pei X J,Wu J H,et al.Research on the movement features of rock fall by strong earthquake projection type col-lapse[J].J Changchun Inst Technol:Nat Sci Ed,2011,12(3):1-4,20.
[5] 徐伟,张云,梅朱寅.郭达山后山危岩带特征分析及危险性评价[J].山地学报,2016,34(6):741-748.
Xu W,Zhang Y,Mei Z Y.Characteristic analysis and risk assessment of Guo Dashan Mount[J].Mt Res,2016,34(6):741-748.
[6] 杨志法,魏雪云,孙亚丽,等.世界地质公园方山两宜亭景点落石灾害成因及其防治对策研究[J].工程地质学报,2019,27(6):1339-1349.
Yang Z F,Wei X Y,Sun Y L,et al.Study on the cause of rockfall disaster and its prevention in Liangyi Pavilion scenic spot of the world geopark Fangshan[J].J Eng Geol,2019,27(6):1339-1349.
[7] 黄小福,张迎宾,赵兴权,等.地震条件下危岩崩塌运动特性的初步探讨[J].岩土力学,2017,38(2):583-592.
Huang X F,Zhang Y B,Zhao X Q,et al.A preliminary study of kinetic characteristic of rock-fall under seismic loading[J].Rock Soil Mech,2017,38(2):583-592.
[8] 杨龙伟,魏云杰,彭令,等.新疆维吾尔自治区乌恰县康苏红层崩塌运动学特征研究[J].工程地质学报,2020,28(3):520-529.
Yang L W,Wei Y J,Peng L,et al.Kinematical characteristics of collapse in red beds in Kangsu Town,Wuqia County,Xinjiang[J].J Eng Geol,2020,28(3):520-529.
[9] 王颂,张路青,周剑,等.青藏铁路设兴村段崩塌特征分析与运动学模拟[J].工程地质学报,2020,28(4):784-792.
Wang S,Zhang L Q,Zhou J,et al.Characteristic analysis and kinematic simulation of rockfall along Shexing village section of Qinghai-Tibet railway[J].J Eng Geol,2020,28(4):784-792.
[10] 吕艳,王根龙,张新社.翠华山山崩地质遗迹景观离散元数值模拟[J].工程地质学报,2013,21(3):443-449.
Lü Y,Wang G L,Zhang X S.Numerical simulation of Cuihua rock avalanche with discrete element method[J].J Eng Geol,2013,21(3):443-449.
[11] 石崇,王盛年,刘琳.地震作用下陡岩崩塌颗粒离散元数值模拟研究[J].岩石力学与工程学报,2013,32(S1):2798-2805.
Shi C,Wang S N,Liu L.Research of avalanche disaster numerical simulation based on granular discrete element method of high-steep slope under seismic loads[J].Chin J Rock Mech Eng,2013,32(S1):2798-2805.
[12] 申通,王运生,张云辉.皂角沱崩塌形成机制数值模拟[J].山地学报,2016,34(4):442-450.
Shen T,Wang Y S,Zhang Y H.Numerical simulation of formation mechanism of the Zaojiaotuo collapse[J].Mt Res,2016,34(4):442-450.
[13] 刘传正,葛永刚,江兴元,等.鲁甸地震红石岩崩塌触发机理分析[J].防灾减灾工程学报,2016,36(4):601-608.
Liu C Z,Ge Y G,Jiang X Y,et al.Dynamic analysis the Hongshiyan collapse triggered by Ludian Earthquake[J].J Dis Prevent Mitigat Eng,2016,36(4):601-608.
[14] 刘刚,燕云鹏,刘建宇.青藏高原西部地质灾害分布特征及背景分析[J].中国地质调查,2017,4(3):37-45.
Liu G,Yan Y P,Liu J Y.Analysis of distribution character and background of geological hazards in western Qinghai-Tibet Pla-teau[J].Geol Surv China,2017,4(3):37-45.
[15] 纳曼·麦麦提,张鹏,李俊才.基于离散元地震作用下块状危岩群体崩塌前兆特征研究[J].南京工业大学学报:自然科学版,2017,39(2):97-101.
Muhammat N,Zhang P,Li J C.Seismic group collapse precursory characteristics of the blocky perilous rocks based on discrete element[J].J Nanjing Tech Univ:Nat Sci Ed,2017,39(2):97-101.
[16] 高相波,李丽慧,廖小辉,等.基于逆向工程建模方法的危岩体稳定性数值模拟分析[J].工程地质学报,2020,28(3):557-564.
Gao X B,Li L H,Liao X H,et al.Numerical simulation analysis of stability of unstable rock mass with reverse engineering modeling method[J].J Eng Geol,2020,28(3):557-564.
[17] 杨庆华,姚令侃,任自铭,等.地震作用下松散体斜坡崩塌动力学特性离心模型试验研究[J].岩石力学与工程学报,2008,27(2):368-374.
Yang Q H,Yao L K,Ren Z M,et al.Centrifugal model test on dynamical characteristics of landslips of loose slope under seismic loading[J].Chin J Rock Mech Eng,2008,27(2):368-374.
[18] 戴屹立,李俊才,张鹏,等.陡崖块状危岩崩塌破坏时间的地震模型试验[J].南京工业大学学报:自然科学版,2019,41(2):201-205.
Dai Y L,Li J C,Zhang P,et al.Earthquake model test on collapse time of cliff massive dangerous rock[J].J Nanjing Tech Univ:Nat Sci Ed,2019,41(2):201-205.
[19] 宋波,李吉人,郝晓敏,等.边坡崩塌落石运动距离振动台试验研究[J].建筑结构学报,2016,37(S1):366-372.
Song B,Li J R,Hao X M,et al.Shaking table test on distance of slope rockfalls collapse[J].J Build Struct,2016,37(S1):366-372.
[20] 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):257-267,270.
Chen Z X,Ye X,Zhang W B,et al.Formation mechanism analysis and stability evaluation of dangerous rock collapses based on the oblique photography by unmanned aerial vehicles[J].China Earthq Eng J,2019,41(1):257-267,270.
[21] 梁京涛,铁永波,赵聪,等.基于贴近摄影测量技术的高位崩塌早期识别技术方法研究[J].中国地质调查,2020,7(5):107-113.
Liang J T,Tie Y B,Zhao C,et al.Technology and method research on the early detection of high-level collapse based on the nap-of-the-object photography[J].Geol Surv China,2020,7(5):107-113.
[22] Ciantia M O,Arroyo M,Calvetti F,et al.An approach to enhance efficiency of DEM modelling of soils with crushable grains[J].Géotechnique,2015,65(2):91-110.