基于摄影测量的落石路径获取及被动防护网服役性能评估

doi:10.13722/j.cnki.jrme.2021.0038

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Abstract In the field of slope engineering，especially in the slope engineering with high and steep dangerous rock mass，rockfall has become one of the main research topics in this field. At present，passive flexible protective net is widely used because of its superior performance. Taking the entrance slope of K158 Baima No.1 Tunnel on Chongqing—Huaihua railway as the research object，the service performance of the current passive protection system is evaluated under the assumption of rockfall in this area. Based on the theory of probability statistics，energy loss and collision rebound，the two-dimensional rockfall trajectory simulation software RocFall is used to simulate. Finally，according to the protection effect of all levels of protective nets，the service performance of passive protective nets is evaluated. The results show that：(1) in the case of no protective net，13.3% of the block in the #1 rockfall area may cause damage to the railway；(2) the current passive protection system has good protection effect for the #1 rockfall area with the mass less than 3 000 kg；(3) the fifth level protective net has no effect. (4) In the current passive protection system，the fourth level protection net mainly plays the role of energy dissipation，and the second and third level protection nets mainly play the role of interception. The research results can provide reference for the design and performance analysis of other rockfall protection.

Key words： slope engineering dangerous rock mass photogrammetry rockfall simulation evaluation of passive protection net

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	ZHANG Zhiping1
	XIA Zhixiong1
	JIN Changrui2
	ZHAO Lianheng2

Cite this article:

ZHANG Zhiping1,XIA Zhixiong1,JIN Changrui2, et al. Acquisition of rockfall path and service performance analysis of passive protective net based on photogrammetry[J]. , 2021, 40(S2): 3274-3283.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0038 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/IS2/3274

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