Analysis and comparison of approaches for determining horizontal bearing capacity of rocksocketed pile
1. Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing, Jiangsu 211189, China; 2. School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, China; 3. Guangdong Electric Power Design Institute Co., Ltd., China Energy Engineering Group, Guangzhou, Guangdong 510663, China; 4. Northwest Engineering Corporation Limited, PowerChina, Xi′an, Shaanxi 710065, China
Abstract：The existing method and theory for determining the horizontal bearing capacity of rocksocketed pile, including subgrade reaction method and elastic continuum method were summarized and analyzed. The results from different methods were compared based on the insitu test data, and the validity and limitations of the different methods were discussed. The results show that the accuracy of subgrade reaction method depends mainly on experience. The linear elastic subgrade reaction methods of constant method and Matlock method with single parameter are relatively simple, but it is difficult to determine the parameters for rocksocketed pile in the absence of field test data. The py curve method is more suitable for the pile with large deformation because it reflects the nonlinear reaction of foundation. However, the py curve method proposed by Reese overestimates the stiffness of the rock mass, and the validation of the py curves for rocksocketed pile is still inadequate. In the elastic continuum method, the continuity of rock is considered, but it is difficult to include the complex effects in practical engineering.
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