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《Technology of Highway and Transport》 2018-01
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Discussion on Design of Tunnel Anchorage Body Length Based on Wedge Effect

HUO Jianxiong;YANG Xingyu;ZHEN Shengbao;WANG Zhonghao;  
Based on the limit state formula of surrounding rock failure stage,the length of the anchorage body corresponding to the load at all levels was calculated and the length of the anchorage body calculated by 7 times of the design load was taken as the research object.Combining the formulas of maximum shear force and shear resistance stability formula,the safety coefficient for its stability was checked and analyzed.The results have showed:1) The load at each level and the length of anchorage body increases linearly by the formula of ultimate failure state; 2) The safety coefficient calculated by the two kinds of formulas conforms to the standard requirements.
【CateGory Index】: U448.25
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