地面沉降地区高速铁路工程地质选线

Engineering Geology Line Selection of High-Speed Railway in Land Subsidence Area

为解决东营-潍坊地区高速铁路工程的地质选线问题,运用InSAR空间对地观测技术、现场访问调查、资料收集等综合勘察手段,查明了该地区地面沉降的规模和范围,分析了造成沉降的主要原因,并根据研究区地面沉降情况对两个方案(穿北辛庄方案、绕北辛庄方案)进行了比选。研究表明,穿北辛庄方案有6.15km段落穿越东营盐场沉降区,且沉降速率均超过60mm/a,最大沉降速率为120mm/a,线路将受到大规模不均匀沉降的影响;绕北辛庄方案线路设计里程较短、线形更加顺直,而且避开了东营广饶盐场大面积地面沉降区,且线路与该沉降区沉降等值线的外扩线方向一致,避免了线路的不均匀沉降,降低了铁路建成后的运营风险和后续处理地面沉降的巨额投资。

In order to solve the engineering geology line selection problem of high-speed railway project in Dongying-Weifang area,InSAR space observation technology,field survey,data collection and other survey means were used to identify the range and scale of the land subsidence in the research area,and according to the land subsidence situation in the study area,two schemes ( scheme of traversing Beixinzhuang,scheme of bypassing Beixinzhuang) of the line were compared. Studies show that scheme of traversing Beixinzhuang has a section 6. 15km long passing through the area of Dongying Saltern,with all land subsidence rates exceeding 60 mm/a and a maximum rate of 120 mm/a,thus the railway will be affected by large - scale uneven settlement;compare with the above scheme,the design mileage of line scheme bypassing Beixinzhuang is shorter,the line is straighter,this scheme avoids the Dongying Saltern land subsidence area,and the line of this scheme is in the same direction as the outward expansion line of the land subsidence contour line in the this area,which avoids the uneven settlement of the line. Scheme of bypassing Beixinzhuang reduces the operational risk after the completion of the railway,and reduces the huge investment in dealing with the subsequent land subsidence.