Abstract：Research purposes: Pile—net structure subgrade is an effective way for reinforcement of soft soil foundation，but so far there is no relatively mature calculation theory and method for the settlement of pile—net structure subgrade．
Research conclusions: At first，the cooperative mechanism of pile—net structure subgrade was analyzed briefly．Then，taking the settlement of one subgrade section of Beijing—Shanghai Hish—speed Railway as the study object，the settlement in the reinforcement area was solved by using the composite modulus method and pile compression method， and the settlement of subjacent bed Was solved by using Boussinesq method and Japanese 1／3 method．The result of comparing it with the measured value showed that this method is reasonable and available for calculation of the settlement of pile—net structure subgrade．
Yu Lei Design and Application of Prestressed Tubular Pile in Treating Soft Soil Foundation of Wenzhou - Fuzhou Railway L ine [ J ]. Journal of Railway Engineering Society, 2007(S1): 108 -112.
Tongji University, eta.l Study on the Calculation Theory and Design Method of High -Speed Railway CFG Pile Composite Foundation [R ]. Shanghai Tongji University, etc, 2009.
Beijing Jiaotong University, eta.l Report on Quality Control System and Dectection Method of High -speed Railway CFG Pile [R ]. Beijing: Beijing Jiaotong University, eta.l 2009.
2010, Vol. 27 
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