SHI Sheng-wei, LIANG Jiong, HAN Xin-qiang, LI Qian-kun, YANG Dong. 2013: Model research on the distance-to-diameter ratio of the micro-piles composite structure. Geological Bulletin of China, 32(12): 2008-2014.
Citation:
SHI Sheng-wei, LIANG Jiong, HAN Xin-qiang, LI Qian-kun, YANG Dong. 2013: Model research on the distance-to-diameter ratio of the micro-piles composite structure. Geological Bulletin of China, 32(12): 2008-2014.
SHI Sheng-wei, LIANG Jiong, HAN Xin-qiang, LI Qian-kun, YANG Dong. 2013: Model research on the distance-to-diameter ratio of the micro-piles composite structure. Geological Bulletin of China, 32(12): 2008-2014.
Citation:
SHI Sheng-wei, LIANG Jiong, HAN Xin-qiang, LI Qian-kun, YANG Dong. 2013: Model research on the distance-to-diameter ratio of the micro-piles composite structure. Geological Bulletin of China, 32(12): 2008-2014.
Technical Center for Geological Hazard Prevention and Control, CGS, Chengdu 611734, Sichuan, China;2. Institute of Prospecting Technology, Chinese Academy of Geological Sciences, Chengdu 611734, Sichuan, China
Aimed at solving the problem of gravel soil landslide slip along the bedrock surface, the authors studied the formation of the soil arching effect and the load-bearing mechanism under the condition of parallel arrangement of three rows of micro combined anti-slide pile reinforcement and according to the model test and finite element analysis. The result reveals the optimum distance-to-diameter ratio. As the result shows，in a certain load, the soil arching effect is first formed at the first row of micro-piles, and then with the increase of distance-to-diameter ratio, the soil arching effect is gradually formed at the second and third row; furthermore, load sharing ratio in the front row is significantly greater than that of the rear one. Soil arching effect is inconspicuous or non-existent when the distance-to-diameter ratio is less than 3 or greater than 11. The most ideal distance-to-diameter ratio is 7 and 8.
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