Abstract：Based on the measuring data of static load test and pile stress measurement of 4 test piles in the rail transit engineering in Taihu lacustrine-swamp sedimentary soils area，the characteristics of skin friction and tip resistance of large-diameter and super-long bored piles in cohesive soil are analyzed. The hybrid method of finite element analysis of rod structure coupling with the shear displacement method for single pile is utilized to simulate and predict the single pile settlement. The test results show that，when the load on single pile is vertical，the skin friction and tip resistance of large-diameter and super-long bored pile in soil layer are gradually exerted from top to bottom；and the two above resistances do not play simultaneously but have mutual influence on each other. The pile-soil displacement is 4–7 mm when skin friction reaches to ultimate value. It is verified that the settlement calculation hybrid method in which the anisotropy of rock and soil around pile and nonlinearity of shear sliding on boundary are considered can predict the settlement of single pile successfully.
张瑞坤，石名磊，倪富健，王 晋. 黏性土中大直径超长钻孔灌注桩承载性状及单桩沉降分析[J]. 岩石力学与工程学报, 2013, 32(s2): 4190-4198.
ZHANG Ruikun，SHI Minglei，NI Fujian，WANG Jin . ANALYSIS OF BEARING PROPERTIES OF LARGE-DIAMETER AND SUPER-LONG BORED PILE IN COHESIVE SOIL AND SINGLE PILE SETTLEMENT. , 2013, 32(s2): 4190-4198.
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2013, Vol. 32 
