高速铁路深厚软基连续薄板梁结构测试分析
摘要:在深厚软土地基上修筑无砟轨道高速铁路低矮路基，需要重点解决好软土地基工后沉降和长期动力稳定性问题。软土地基具有高压缩性，路堤荷载作用下会产生较大的残余沉降；同时，线路运营后，地基土在高速列车长期循环动荷载作用下易产生较大的塑性变形，二者耦合将严重影响到无砟轨道的几何状态和线路运营安全。基于此，在京沪高速铁路上海虹桥深厚软土地区低矮路基中，首次采用了桩基-连续薄板梁结构型式，并进行了系统的静动态监测、测试。结果表明，该结构工后沉降控制效果良好、长期循环荷载作用下性能稳定，可以满足高速铁路铺设无砟轨道和高速列车长期平顺运行的要求。
Abstract:The settlement and the long-term dynamic stability of soft ground were the key technical problems,when the low subgrade of high speed railway with ballastless track was constructed in deep soft soil region.The soft ground will have large residual settlement under embankment load because of its high compressibility and the foundation soil may have greater plastic deformation arise from long-term large dynamic load in the operation process,which can seriously affects the ride comfort of ballastless track.In order to decrease settlement and improve the long-term dynamic stability of the low embankment on deep soft ground in Shanghai Hongqiao area of Beijing-Shanghai High Speed Railway,the bored pile-continuous thin plate structure was firtstly used with detailed monitoring and testing.The analysis results indicate that this structure has the characteristic of smaller post-construction settlement and better resistance capacity to dynamic load deformation,so it can meet the controlling requirements of ballastless track on high speed railway.
中文标题：
高速铁路深厚软基连续薄板梁结构测试分析
Experimental Study on Deep Soft Ground of High Speed Railway Treated with Bored Pile-continuous Thin Plate Structure
作者：
孙红林
Sun Honglin
作者简介:孙红林,1973年生,男,汉族,山西曲沃人,大学本科,学士学位,教授级高级工程师,注册土木(岩土)工程师,主要从事铁路勘察、设计与科研工作。E-mail:hlin_sun@sina.com
通讯地址：
中铁第四勘察设计院集团有限公司地路处, 湖北武汉 430063
ChinaRailwaySiyuanSurveyandDesignGroupCo.,LTD.,Wuhan430063,Hubei,China
中图分类号:TU471.8;U416
doi:10.3969/j.issn.1007-2993.2014.01.002
出版物：岩土工程技术
收稿日期:2013-06-14
网络出版日期:2021-07-19
关键词:桩基-连续薄板梁结构,高速铁路,软土,低矮路基
Key words:bored pile-continuous thin plate structure,high speed railway,soft ground,low subgrade
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基金项目：
基金项目: 铁道部科技研究开发计划项目(项目编号:2008G031-C)
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