GIS-SVM prediction of surrounding rock stability in mountain tunnel based on numerical experiment

被引：0
|
作者：
Wen H. [1 ,2 ,3 ]
Huang J. [3 ]
Yuan X. [4 ]
Xie P. [5 ]
Xue J. [3 ]
机构：
[1] National Joint Engineering Research Center for Prevention and Control of Environmental GeoHazards in the TGR Area, Chongqing University, Chongqing
[2] Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education, Chongqing University, Chongqing
[3] School of Civil Engineering, Chongqing University, Chongqing
[4] China Railway Eryuan Engineering Group (Chongqing) Survey, Design and Research Co., Ltd., Chongqing
[5] College of Civil Engineering and Architecture, Hainan University, Haikou
来源：
| 1600年 / Academia Sinica卷 / 39期
关键词：
Combined evaluation method; Geographic information system(GIS); Mountain tunnel; Numerical experiment; Support vector machine(SVM); Surrounding rock stability; Tunnelling engineering;
D O I：
10.13722/j.cnki.jrme.2019.0276
中图分类号：
学科分类号：
摘要：
The geological conditions in mountainous areas are complex and changeable, thus accidents of tunnel surrounding rock occur frequently. It is of great significance to accurately predict and evaluate the stability of surrounding rock in the whole course of tunnel. Therefore, by combining the numerical simulation test, the support vector machine(SVM) and GIS technology, this paper proposed a GIS-SVM combined method for visual prediction and evaluation of the surrounding rock stability of the tunnel. Firstly, on basis of the existing research results, seven evaluation indexes of surrounding rock stability including elasticity modulus and Poisson's ratio were selected, SVM training samples were obtained by using the strength reduction method and the numerical simulation in FLAC3D. Afterwards, the SVM evaluation model was established based on the sample. Finally, based on the GIS platform, the established SVM evaluation model was simulated to the Baishiyi tunnel of Zhongliang mountain in Chongqing. The research area was divided into six grades: very stable, stable, relatively stable, basically stable, under stable and unstable, and then the stability prediction and evaluation map of the tunnel was formed. Furthermore, the effectiveness of the prediction was verified by the comparative analysis of the various bad geological conditions. Research results are expected to provide scientific grounds which can ensure the safety and stability of mountain tunnel at the construction and operation stage. © 2020, Science Press. All right reserved.
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页码：2920 / 2929
页数：9
相关论文
共 25 条
  • [1] WEN Haijia, HU Jing, XIE Peng, Et al., Failure modes of rocks surrounding tunnel with two weak interlayers during Excavation, China Journal of Highway and Transport, 31, 10, pp. 220-229, (2018)
  • [2] LI Tianbin, PAN Huangsong, CHEN Guoqing, Et al., Physical model tests on thermo-mechanical effects in rockbursts around tunnels, Chinese Journal of Rock Mechanics and Engineering, 37, 2, pp. 261-273, (2018)
  • [3] JIANG Q, SONG S G, LI T, Et al., Study on surrounding rock stability of small clear-distance twin highway tunnel with eight lanes, Geotechnical and Geological Engineering, 37, 2, pp. 593-598, (2019)
  • [4] ZHONG Zhibin, DENG Ronggui, SUN Yi, Et al., Fracture mechanism of hard and brittle tunnel surrounding rock with nearby large joints, China Journal of Highway and Transport, 31, 5, pp. 106-116, (2018)
  • [5] JIANG Feng, TANG Lizhong, GAO Longhua, Numerical analysis of the stability of surrounding rock of roadway of composite structure under different angles, Journal of Railway Science and Engineering, 12, 5, (2015)
  • [6] CHENG Xuansheng, ZHENG Yingren, TIAN Ruirui, Dynamic finite element strength reduction method of earthquake stability analysis of surrounding rock of tunnel, Rock and Soil Mechanics, 32, 4, pp. 1241-1248, (2011)
  • [7] WU Yimin, LI Wenbo, FU Helin, Et al., Numerical simulation of freeze-thaw in short period of secondary lining at tunnel transition section in seasonal frozen area, Chinese Journal of Geotechnical Engineering, 39, 10, pp. 1930-1935, (2017)
  • [8] HE P, LI S C, LI L P, Et al., Discontinuous deformation analysis of super section tunnel surrounding rock stability based on joint distribution simulation, Computers and Geotechnics, 91, pp. 218-229, (2017)
  • [9] WANG Fengyun, QIAN Deling, Dilatancy analysis for a circular tunnel excavated in rock mass based on unified strength theory, Rock and Soil Mechanics, 40, 5, pp. 1966-1976, (2019)
  • [10] FRALDI M, GUARRACINO F., Limit analysis of progressive tunnel failure of tunnels in Hoek-Brown rock mass, International Journal of Rock Mechanics and Mining Sciences, 50, pp. 170-173, (2012)
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