摘要
基于分层总和法和GeoStudio数值软件,从沉降、水平位移和路基边坡稳定性等方面分析某新建铁路路基对既有铁路路基安全稳定性的影响。研究结果表明:分层总和法计算得出路基填筑扩建后,既有路基左线中心处沉降为6.4mm,沉降量大于规范值;数值建模计算得到既有路基左线中心处沉降为8.5mm,沉降量与分层总和法计算结果较为一致,均不满足轨道线路静态几何尺寸容许偏差管理值的要求;水平位移小于1.0mm,满足规范允许值;新建路基对既有路基边坡的稳定性不造成影响,不会造成既有路基的失稳。
Based on layer wise summation method and GeoSudio numerical software,the influence of a newly built railway to the safety and stability of existing railways has been analyzed from settlement,horizontal displacement and subgrade slope stability,etc.The results show that after the expansion of subgrade refilling,the settlement of the left center of the existing subgrade is 6.4 mm calculated by layer wise summation method which is larger than regulated value;while that value calculated by numerical modeling is 8.5 mm which is consistent with the one calculated by layered summation method;both values do not meet the static geometry size tolerance management value and the horizontal displacement is less than 1.0 mm which is in line with the specification value.The newly built roadbed will not affect the stability of the slope of the existing roadbed.
作者
郭涛
GUO Tao(Jiangsu Nanyanjiang Intercity Railway Co.,Ltd.,Nanjing 210015,China)
出处
《路基工程》
2021年第4期77-82,共6页
Subgrade Engineering
关键词
新建铁路
既有铁路
路基
沉降
位移
稳定性
newly-built railway
existing railway
subgrade
settlement
displacement
stability
