软弱公路路基CFG桩处理后路基稳定性模糊评价分析

Fuzzy Evaluation and Analysis of Subgrade Stability after CFG Pile Treatment of Soft Highway Subgrade

评价CFG桩处理软弱公路路基强度效果常用桩体完整性、复合地基承载力、低应变及静载实验四个参量进行综合评价。本研究将CFG桩四个评价参量进行量化,并基于模糊综合评价理论,将评价参量进行系统化,并选用专家评分、最佳隶属程度的方法界定CFG桩成桩的综合稳定性。该方法在CFG实例工程中具有较好的适用性,其评价成果较好地反映了路基处理后的实际效果,同时验证了该方法的正确、可靠性,对软弱路基的CFG路基处理方法具有较好的指导意义。

To evaluate the strength effect of CFG pile on soft highway subgrade,four parameters,pile integrity,composite foundation bearing capacity,low strain,and static load test,are commonly used for comprehensive evaluation.This study quantifies the four evaluation parameters of CFG pile,systematizes the evaluation parameters based on the fuzzy comprehensive evaluation theory,and defines the comprehensive stability of CFG pile by using expert scoring and the best degree of membership.This method has good applicability in the CFG example project,and its evaluation results better reflect the actual effect of subgrade treatment,and verify the correctness and reliability of this method,which has certain guiding significance for the CFG subgrade treatment method of soft subgrade.