Experiment study of synergistic anchorage efficiency in anchorage body with preload bolt
LONG Jingkui1，2，LIU Yutian3
(1. State Key laboratory for Geo-mechanics and Deep Underground Engineering，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China；2. School of Mechanics and Civil Engineering，China University of Mining and Technology，Xuzhou， Jiangsu 221116，China；3. Xuhai College，China University of Mining and Technology，Xuzhou，Jiangsu 221008，China)
Abstract：In order to study the synergistic anchorage efficiency in the anchorage body with preload bolt，a set of specimens are made under laboratory conditions. By applying various preload to the bolt，the experiment analyzes the stress value at different measuring points within the anchorage body and the features of stress distribution. It proves the objective existence of the synergistic anchorage efficiency in the anchorage body，puts forward the concept of synergistic index，and develops its calculation formula. In this way，the evaluation method of the synergistic efficiency is established. The study shows that the scope of synergistic anchorage efficiency within the anchorage body takes the shape of an ellipse，and increases when the preload rises. It is inferred that the bolt preload plays an important role in enhancing the synergistic anchorage effect in the anchorage body，expanding the scope of synergistic anchorage efficiency，and improving its strength and stiffness.
龙景奎1，2，刘玉田3. 预紧力锚杆作用下锚固体协同锚固效应试验研究[J]. 岩石力学与工程学报, 2016, 35(S1): 2795-2802.
LONG Jingkui1，2，LIU Yutian3. Experiment study of synergistic anchorage efficiency in anchorage body with preload bolt. , 2016, 35(S1): 2795-2802.
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2016, Vol. 35 
