高速铁路黄土隧道明洞段地基处理方法研究
摘要:黄土地区高速铁路隧道洞口明挖段地基处理方法的选择应着眼于消除湿陷性与控制沉降变形的双重标准。以兰州市榆中县某黄土高速铁路隧道洞口明挖段地基处理为例,采用水泥土挤密桩进行地基处理时发生塌孔、缩孔,变更为钻孔桩并在桩顶设置钢筋混凝土刚性托板的桩板结构处理方案后,地基处理效果良好。说明了黄土隧道明洞段地基处理方法应结合黄土含水率、湿陷性等诸多因素通过技术经济比较后合理地选用。
Abstract:The choice of foundation treatment method for open cut section of high-speed railway tunnel in loess area should focus on eliminating double standards of collapsibility and controlling settlement and deformation.In this paper,Yuzhong county,Lanzhou city,taking a loess high-speed railway tunnel excavation section of the foundation treatment as an example,the use of cement-soil compaction pile for foundation treatment occurs when the hole collapsed and shrinkaged,changed to bored pile,and reinforced concrete rigid support plate is set to the top of the pile,the pile-plank structure has good effect of foundation treatment.It is shown that the method of foundation treatment in loess tunnel should be selected rationally according to the technical and economical comparison with the factors such as water content,collapsibility and so on.
中文标题：
高速铁路黄土隧道明洞段地基处理方法研究
Study on Foundation Treatment Method for Open Cut Section of Loess Tunnel in High-speed Railway
作者：
刘鹏飞
Liu Pengfei
作者简介:刘鹏飞,男,1986年生,汉族,陕西西安人,工程师,中同地质大学(武汉)地下建筑工程学士,主要从事岩土及隧道与地下工程方面的勘察设计工作。E-mail:530251622@qq.com
通讯地址：
中铁第五勘察设计院集团有限公司, 北京 102600
ChinaRailwayFifthSurvey&DesignInstituteGroupCo.,Ltd,Beijing102600,China
中图分类号:U25
doi:10.3969/j.issn.1007-2993.2017.04.001
出版物：岩土工程技术
收稿日期:2017-05-04
网络出版日期:2021-07-06
关键词:高速铁路,黄土隧道明洞,地基处理,水泥土挤密桩,柱锤冲扩桩,桩板结构
Key words:high-speed railway,open cut section of loess tunnel,foundation treatment,cement-soil compaction pile,column hammer-expansion pile,pile-plank structure
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