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MODERN TUNNELLING TECHNOLOGY 2020, Vol. 57 Issue (3) :128-134    DOI:
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Study on Creep Characteristics of the Carbonaceous Surrounding Rocks Based on Improved Weertman Model
（1 Guangxi Communications Design Group Co., Ltd., Nanning 530029; 2 Guangxi Hechi-Baise Expressway Co., Ltd., Nanning 530029; 3 Guangxi Beibu Gulf Investment Group Co., Ltd., Nanning 530029）
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Abstract Deformation of surrounding rocks of the carbonaceous rock tunnel is characterized by large magnitude, rapidity, long duration, large disturbance and creep, which is a key technical problem encountered during construction of the carbonaceous rock tunnels. Based on the statistical basis of displacement and temperature variation of the carbonaceous surrounding rocks of Guangxi Hechi-Baise expressway tunnels, a function relationship between temperature and time is established and the Weertman creep model is introduced, the creep characteristics of surrounding rocks is studied from the perspective of mechanism under the correlationof temperature and time, and the mechanism and development law of creep of the carbonaceous surrounding rocks are revealed. The results show that by using the improved Weertman model it can effectively calculate, analyze and predict the creep development law of carbonaceous surrounding rocks under the correlation of temperature and time without considering the osmotic pressure.
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DENG Shengqiang1 LUO Junhui1 MI Decai1 ZHANG Boyu2 ZHOU Shanxiong3
Keywords： Carbonaceous rock   Creep   Temperature effect   Tunnel   Improved Weertman model     
Abstract： Deformation of surrounding rocks of the carbonaceous rock tunnel is characterized by large magnitude, rapidity, long duration, large disturbance and creep, which is a key technical problem encountered during construction of the carbonaceous rock tunnels. Based on the statistical basis of displacement and temperature variation of the carbonaceous surrounding rocks of Guangxi Hechi-Baise expressway tunnels, a function relationship between temperature and time is established and the Weertman creep model is introduced, the creep characteristics of surrounding rocks is studied from the perspective of mechanism under the correlationof temperature and time, and the mechanism and development law of creep of the carbonaceous surrounding rocks are revealed. The results show that by using the improved Weertman model it can effectively calculate, analyze and predict the creep development law of carbonaceous surrounding rocks under the correlation of temperature and time without considering the osmotic pressure.
Keywords： Carbonaceous rock,   Creep,   Temperature effect,   Tunnel,   Improved Weertman model     
Cite this article:   
DENG Shengqiang1 LUO Junhui1 MI Decai1 ZHANG Boyu2 ZHOU Shanxiong3 .Study on Creep Characteristics of the Carbonaceous Surrounding Rocks Based on Improved Weertman Model[J]  MODERN TUNNELLING TECHNOLOGY, 2020,V57(3): 128-134
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