摘要
地下水开采是地面沉降的重要诱因,合理评估地下水开采区地面沉降对沿线铁路工程的影响,对铁路建设运营具有重要意义。以鲁南高铁菏泽至兰考段沉降区为例,在现场调查的基础上,以2016年5月—2020年7月中长达4年的In SAR数据和地面水准测量数据为模型率定依据,建立区域沉降地段三维渗流-应力耦合地面沉降模型,预测并分析了不同开采条件下未来15年的地下水变化情况和地面沉降规律。研究结果表明:沿线的地面沉降主要是由于线路两侧200 m范围内地下水开采引起的,在现状开采条件下,未来15年铁路沿线沉降漏斗的影响半径呈现增加趋势,至2035年沉降中心处累计沉降量将达到200 mm以上,严重威胁高铁工程的正常运营;关闭沿线200 m范围内的抽水井可较好地改善地面沉降问题,至2035年年沉降量减小约20 mm。
Groundwater exploitation is an important cause of land subsidence.A reasonable evaluation of the impact of land subsidence in groundwater exploitation area on railway engineering is of great significance for railway construction and operation.Taking the subsidence area of Heze-Lankao section of the Lunan high-speed railway as an example,and based on field surveys,a three-dimensional seepage-stress coupling land subsidence model was established using InSAR data and ground-level measurement data from May 2016 to July 2020 for model calibration.The model predicted and analyzed groundwater changes and land subsidence patterns in the next 15 years under different mining conditions.The results showed that the land subsidence along the railway was mainly caused by groundwater exploitation within a 200 m range on both sides of the line.Under current exploitation conditions,the influence radius of the subsidence funnel along the railway will continue to increase in the next 15 years.By 2035,the cumulative subsidence at the center of the subsidence area will reach about 200 mm,posing a severe threat to the normal operation of the high-speed railway.Closing the pumping wells within 200 m along the line can significantly mitigate the land subsidence risk,reducing annual subsidence by about 20 mm by 2035.
作者
田月峰
TIAN Yuefeng(Lunan High Speed Railway Co.,Ltd.,Jinan 250102,China)
出处
《铁道标准设计》
北大核心
2024年第10期55-60,共6页
Railway Standard Design
关键词
高速铁路
铁路路基
地面沉降
地下水
沉降预测
high-speed railway
railway subgrade
land subsidence
groundwater
settlement prediction
