摘要
以银西(银川—西安)高速铁路典型路堑高边坡支挡工程为例,对放坡、桩板式挡土墙和双排钻孔灌注桩挡土墙3种方案进行稳定性计算,对比分析其力学特征及综合效益。结果表明:挡土墙方案优于放坡方案;而深厚黄土地层条件下双排钻孔灌注桩挡土墙的应力分布、位移变形等力学特征,材料消耗、施工周期等经济指标明显优于桩板式挡土墙。
Taking the typical cutting high slope retaining engineering in Yinchuan-Xi'an high speed railway as an example,the stability calculation for three kinds of schemes including step-slope,pile-plate retaining wall and doublerow cast-in-place bored pile retaining wall was carried out,the mechanical characteristics and comprehensive benef its were compared and analyzed.The results show that retaining wall scheme is superior to step-slope scheme,and the mechanical characteristics such as stress distribution,displacement and deformation and the economic indicators such as material consumption and construction cycle of the double-row cast-in-place bored pile retaining wall are obvious better than that of pile-plate retaining wall.
引文
[1]杲斐.黄土路堑边坡桩板墙桩间距研究[D].兰州:兰州大学,2014.
[2]高德彬,倪万魁,杨泓全.黄土地区公路路堑高边坡植物防护探讨[J].路基工程,2007(5):125-127.
[3]乔翔.基于极限平衡法的高边坡稳定性分析及处治措施[J].铁道建筑,2017,57(8):89-93.
[4]刘海松.黄土地区公路高边坡防护方案优化选择研究[D].西安:长安大学,2005.
[5]国家铁路局.铁路特殊路基设计规范:TB 10035—2018[S].北京:中国铁道出版社,2018.
[6]中华人民共和国铁道部.铁路路基支挡结构设计规范:TB10025—2006[S].北京:中国铁道出版社,2009.
[7]马郧,魏志云,徐光黎,等.基坑双排桩支护结构设计计算软件开发及应用[J].岩土力学,2014,35(3):862-870.
[8]中华人民共和国住房和城乡建设部.建筑基坑支护技术规程:JGJ 120—2012[S].北京:中国建筑工业出版社,2012.
[9]吴刚,白冰,聂庆科.深基坑双排桩支护结构设计计算方法研究[J].岩土力学,2008,29(10):2753-2758.
[10]熊巨华.一类双排桩支护结构的简化计算方法[J].勘察科学技术,1999(2):32-34.
[11]王端端,周志军,吕彦达,等.湿陷性黄土中成孔方式对桩基承载力影响试验研究[J].岩土力学,2015,36(10):2927-2933.