首页 | 本学科首页   官方微博 | 高级检索  
     检索      

高速铁路CFG桩复合地基柔性载荷试验研究
引用本文:刘升传 ,王连俊 ,丁桂伶.高速铁路CFG桩复合地基柔性载荷试验研究[J].力学学报,2008,16(6):813-819.
作者姓名:刘升传   王连俊   丁桂伶
作者单位:(北京交通大学土建学院 ,北京 ,100044)
摘    要:高速铁路建设的迅速发展及高速铁路对路基沉降的严格要求,CFG桩在高速铁路路基的处理上得到大量运用。但铁路工程对路基的作用原理与工民建工程对地基的作用原理有本质的区别,工民建房屋建筑荷载通过基础对地基施加刚性荷载,而铁路路基直接承受上部路堤的自重和列车运行产生的柔性荷载。高速铁路CFG桩复合地基的设计都是根据工民建行业的设计理论进行,其试验结果必然与实际情况存在偏差。本文着手研究适合于高速铁路复合地基的柔性载荷试验方法,模拟高速铁路柔性加载的特性,通过数值分析对比了刚性荷载和柔性载荷作用下CFG桩复合地基的桩、土应力、位移分布情况;通过现场载荷试验对设计方案进行了验证,研究了高速铁路CFG桩复合地基的承载力特性,结果证明柔性载荷试验是可行的,能合理的模拟高速铁路CFG桩复合地基承载特性,可为柔性基础下CFG桩复合地基的设计提供基础。

关 键 词:高速铁路  CFG桩复合地基  数值模拟  柔性载荷试验

FLEXIBLE OR RIGID LOADING TESTS FOR BEARING CAPACITY OF CFG PILE COMPOSITE FOUDATION ALONG HIGH-SPEED RAILWAY
LIU Shengchuan |WANG Lianjun |DING Guiling.FLEXIBLE OR RIGID LOADING TESTS FOR BEARING CAPACITY OF CFG PILE COMPOSITE FOUDATION ALONG HIGH-SPEED RAILWAY[J].chinese journal of theoretical and applied mechanics,2008,16(6):813-819.
Authors:LIU Shengchuan |WANG Lianjun |DING Guiling
Institution:(School of Civil Engineering, Beijing Jiaotong University, Beijing |100044)
Abstract:In this paper, the pile and soil stress and displacement of CFG pile composite foundation of high-speed railway are numerically simulated under rigid and flexible loading conditions.   The numerical results indicate the settlement and  the ratio of pile loading distribution in the flexible loading test are less than those  in the rigid loading test.   So there is a difference settlement between pile and soil. Field loading tests were carried out to study and validate results of the rigid and flexible loading tests of the CFG pile composite foundation. It was found that the composite foundation bearing capacity under railway flexible load was controlled by the soil between piles.   The soil between piles  was the first to damage, then the whole composite foundation failed. The test results  show that the flexible loading test with cushion is available and can simulate the bearing capacity of CFG pile composite foundation more reasonable. The tests also provide a basis for the design of CFG pile composite foundation under flexible conditions.
Keywords:High-speed railway  CFG pile composite foundation  Numerical analysis  Flexible loading test  Field test
点击此处可从《力学学报》浏览原始摘要信息
点击此处可从《力学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号