黄土高原运营铁路竖向旋喷桩整治高填路基沉降技术  

Vertical Spinning Pile Remediation of Highly Filled Roadbed Settlement Technology for Railway Operation on Loess Plateau

作　　者：庞伟军 高剑 张良峰 PANG Weijun;GAO Jian;ZHANG Liangfeng(Northwest Science Research Institute Co.,Ltd.of CREC,Lanzhou 730000,China;Zhongwei Track Maintenance Division of China Railway Lanzhou Bureau Group Co.,Ltd.,Zhongwei 755000,Gansu,China)

机构地区：[1]中铁西北科学研究院有限公司,兰州730000 [2]中国铁路兰州局集团有限公司中卫工务段,甘肃中卫755000

出　　处：《路基工程》2025年第2期216-221,共6页Subgrade Engineering

摘　　要：基于路基结构形式、试桩易钻程度和变形发育特征,分析黄土高填路基的主要沉降原因和沉降变形区位;结合宝中线列车荷载特征、轨枕的间距形态、旋喷桩工艺现状及附加荷载影响深度和复合地基承载力的相关计算理论,计算确立竖向旋喷桩的桩长、桩间距、桩径、平面布设形态等施工工艺参数。数值模拟与监测评价表明:采用桩长10.0 m和12.0 m、桩间距1.2 m、桩径0.8 m等参数的竖向旋喷桩三角状布设工艺,可有效抑制区间路基的沉降变形,防治效果良好。Based on the structural form of subgrade,easy drilling of test piles and the characteristics of deformation and development,the main settlement causes and settlement deformation locations of loess high-filled subgrade were analyzed.Combined with train load characteristics,spacing form of sleepers,process status of jet grouting piles,influence depth of additional load and the related calculation theory of composite foundation bearing capacity of Baoji—Zhongwei Railway,the paper calculates to establish construction process parameters of vertical jet grouting piles,e.g.pile length,pile spacing,pile diameter and plane layout form.After the numerical simulation and monitoring evaluation,it shows that,the triangular layout technology of vertical jet grouting piles with parameters such as pile length of 10.0 m and 12.0 m,pile diameter of 0.8 m and pile spacing of 1.2 m can effectively inhibit the settlement deformation of the subgrade in the interval,with good control effect.

关 键 词：高填方路基 附加荷载 沉降整治 旋喷桩布设 监测评价 

分 类 号：U216.417[交通运输工程—道路与铁道工程]