武广高铁CFG桩复合地基工后沉降影响因素

doi:10.3969/j.issn.0258-2724.2015.05.003

详细信息

作者简介:
张峰(1969-),男,教授级高工,研究方向为高速铁路路基加固理论及沉降控制,E-mail:439992525@qq.com引文格式: 张峰,刘莹,许兆义,等. 武广高铁CFG桩复合地基工后沉降影响因素[J]. 江南娱乐网页版入口官网下载安装学报,2015,50(5): 783-788.
张峰(1969-),男,教授级高工,研究方向为高速铁路路基加固理论及沉降控制,E-mail:439992525@qq.com引文格式: 张峰,刘莹,许兆义,等. 武广高铁CFG桩复合地基工后沉降影响因素[J]. 江南娱乐网页版入口官网下载安装学报,2015,50(5): 783-788.
张峰(1969-),男,教授级高工,研究方向为高速铁路路基加固理论及沉降控制,E-mail:439992525@qq.com引文格式: 张峰,刘莹,许兆义,等. 武广高铁CFG桩复合地基工后沉降影响因素[J]. 江南娱乐网页版入口官网下载安装学报,2015,50(5): 783-788.

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出版历程
- 收稿日期:2015-06-03
- 刊出日期:2015-10-25

Factors Influencing Subgrade Post-Construction Settlement of CFG Pile Composite Foundation in Wuhan-Guangzhou High-Speed Railway

摘要

摘要:为了研究软土地区高速铁路CFG(cement flyash gravel)桩复合地基工后沉降,以武广客专试验段为例,基于有限元理论,借助ABAQUS软件,对多个影响CFG桩复合地基工后沉降的因素进行数值模拟,分析各因素对其沉降的影响程度和规律,确定控制沉降量的主要因素.研究结果表明:增大桩的弹性模量或桩径,桩土应力比均增大;增大垫层厚度,桩土应力比减小;采用钢筋混凝土管桩和CFG桩组合时,在CFG桩桩顶的最大沉降为2.01 mm,与全为管桩的情况相比,不均匀沉降减小了46.5%.
- 软土/
- 复合地基/
- 工后沉降/
- 影响因素
Abstract:In order to study the post-construction settlement of CFG(cement flyash gravel)pile composite foundation of high speed railway in soft soilI areas, finite element numerical simulations were made using ABAQUS software for several factors that influence the post-construction settlement of the CFG pile composite foundation in Wuhan-Guangzhou high-speed railway. On this basis, the influence degree and variation of each factor on the settlement was discussed to determine the main control factors of the settlement. The result shows that an increase in the elastic modulus or pile diameter will result in an increase in the stress ratio of pile to soil, and increasing the cushion thickness will decrease the stress ratio of pile to soil. When a combination of reinforced concrete pipe piles and CFG piles is used, the maximum settlement on the pile top is 2.01 mm, and uneven settlement is decreased by 46.5% compared with that using reinforced concrete pipe piles only.
- soft soils/
- composite foundation/
- settlement/
- influencing factors

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