Abstract: Taking the Muzhailing Highway Tunnel of Weiwu Expressway as the engineering background, the characteristics and mechanism of the large deformation of the high-stress carbonaceous slate tunnel were analyzed through the records of typical large-deformation disasters and rock mass characteristics. The results of the study showed that the carbonaceous slate tunnel mainly had two large deformation modes, namely conventional type and sudden type; for different lithological sections, the deformation of the surrounding rock was generally expressed as “corrugated developed carbonaceous slate section> thin monoclinic structural carbonaceous slate section> layered carbonaceous slate interbedded with sandy slate section(interbedded section)”; the deformation mechanism of carbonaceous slate mainly included “slab beam” bending deformation, interlayered structure bedding-slip and plastic flow. The corrugated development section was dominated by plastic flow, the thin monoclinic structure section was dominated by “slab beam” bending deformation, and the interbedded section was dominated by bedding-slip.
郭新新, 朱安龙, 王万平, 汪波, 王智佼, 王振宇. 高应力炭质板岩隧道大变形特征及其机理分析[J]. 隧道与地下工程灾害防治, 2021, 3(4): 29-39.
GUO Xinxin, ZHU Anlong, WANG Wanping, WANG Bo, WANG Zhijiao, WANG Zhenyu. Large deformation characteristics and mechanism analysis of high-stress carbonaceous slate tunnel. Hazard Control in Tunnelling and Underground Engineering, 2021, 3(4): 29-39.
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2021, Vol. 3 
