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Discussion on the Instability Mechanism of Steeply Inclined Strata Around Tunnels and Treatments for Collapse

Author: SuJunJun
Tutor: MaJianQin；YanGuangSheng
School: Chang'an University
Course: Architecture and Civil Engineering
Keywords: Steeply dipping strata Instability Mechanism Collapse Bracing Treatment measures
CLC: U458.3
Type: Master's thesis
Year: 2011
Downloads: 40
Quote: 0
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Abstract


The stability of surrounding rock is one of the main problems of the tunnel and underground engineering design and construction concern . Underground works built on the strength and stability control structure surface rock , its surrounding rock stability of the rock mass structure surface occurrence is directly related to its engineering properties . The paper explores the instability and landslides disposal countermeasures steep rocks tunnel surrounding rock , and an example to explain the disposal of the mill the Kawamura tunnel collapse . Review of tunnel surrounding rock stability factors based on the analysis of the impact of steep dip instability characteristics of tunnel surrounding rock stability factors and surrounding rock strata . On this basis , we investigate the steeply dipping layered rock tunnel surrounding rock instability are three common forms of its mechanism : ① The multi- group structure surface control block slump under gravity ; ② sidewall at the rock block sliding instability ; the strata bent undermine ③ tensile strength control . Given on the basis of previous work , the analysis of the instability mechanism of the three methods , as well as the stability of surrounding rock stress conditions . Based on the analysis results , discussed measures for the disposal of three instability forms . Finally, the disposal of the mill Kawamura tunnel collapse , for example , the description of the rock structure surface and its occurrence characteristics of surrounding rock stability and slumping body analysis of the effect of the the landslides disposal measures .

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CLC: > Transportation > Road transport > Tunnel project > Tunnel safety and accident > Landslide rockfall accident
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