Analysis of Major Factors Affecting CFG Piles Treating Soft Foundation in Mountain Highway

doi:10.3969/j.issn.1674-0696.2015.02.08

Abstract

Abstract: After CFG pile treated the mountain road, its composite foundation bearing capacity, and settlement were affected by many factors. Under Embankment loads, conventional theoretical approach is difficult to analyze the impact of changes in the stress-strain law factors. Finite element analysis software PLAXIS was used to simulate CFG pile composite foundation treatment and embankment construction. Through the analysis of CFG pile length, pile spacing and composite foundation cushion thickness variation, the influence of various factors on the CFG pile composite foundation settlement was summed up, and CFG pile composite foundation pile length,pile spacing and cushion thickness of a reasonable range were analyzed. Ultimately it provides theoretical basis for practical engineering CFG pile composite foundation optimized design.

Key words: road engineering, soft soil foundation, CFG pile composite foundation, settlement, embankment load, finite element analysis

摘要： CFG桩处理山区公路后，其复合地基承载力、沉降量受较多因素影响。在路堤荷载作用下，常规理论方法难以分析其影响因素变化时应力应变规律。主要利用有限元软件PLAXIS对山区高速公路CFG桩复合地基处理及路堤填筑施工进行模拟，通过对CFG桩桩长、桩间距以及复合地基褥垫层厚度这3个影响因素的变化进行对比分析，总结出各影响因素对CFG桩复合地基沉降量的影响规律，分析得出复合地基中CFG桩桩长、桩间距及褥垫层厚度的合理取值范围。最终为实际工程中CFG桩复合地基的优化设计提供理论依据。

关键词: 道路工程, 软土地基, CFG桩复合地基, 沉降量, 路堤荷载, 有限元分析

CLC Number:

U412

Cai Dongjun, Xie Wen. Analysis of Major Factors Affecting CFG Piles Treating Soft Foundation in Mountain Highway[J]. Journal of Chongqing Jiaotong University(Natural Science), 2015, 34(2): 33-38.

蔡冬军,谢文. CFG桩处理山区公路软基的主要影响因素分析[J]. 重庆交通大学学报（自然科学版）, 2015, 34(2): 33-38.

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