SHANG Yonghui,XU Linrong.Study on Load Transfer Law and Deformation Characteristics of Short Pile⁃net Composite Foundation[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(06):1316-1322.
SHANG Yonghui,XU Linrong.Study on Load Transfer Law and Deformation Characteristics of Short Pile⁃net Composite Foundation[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(06):1316-1322. DOI: 10.13409/j.cnki.jdpme.201711007.
Study on Load Transfer Law and Deformation Characteristics of Short Pile⁃net Composite Foundation
In order to explore the load transfer law and deformation characteristics of short pile-net composite foundation, on the basis of the Gan Long (Ganzhou-Longyan) high-speed railway project, field test data was included in this study to analyze the pile-soil stress to load sharing ratio, settlement and lateral deformation of embankment during embankment filling. Results show that: the short pile-net composite foundation can effectively transfer the additional stress to the soil at pile bottom, and the sensitivity of soil pressure to the upper load is less than that of the pile-net composite foundation in high compressible soft soil; stable pile-soil load sharing ratio is about 50%, pile and soil are in good coordination in bearing the loads; 90% of the total settlement is completed in the construction period, lateral deformation along the depth shows a bow type with a maximum lateral deformation of about 25mm, which is about 60% of the pile-net composite foundation in high compressible soft soil; comparing to ground settlement, pile-soil stress is more sensitive to the upper loads, so the ground settlement status can be discriminated according to the change of pile-soil stress ratio to assess the control effect of post construction settlement.
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