雅万高铁沿线地面沉降分析及主要防治对策

雅万高铁穿越雅加达及万隆两大地面沉降区,开展地面沉降现状调查及预测评价,及时采取应对措施,对指导铁路工程设计、施工及运营维护具有十分重要的意义。利用雅加达及万隆当地水文地质、工程地质和环境地质等调查研究资料,结合工程勘察及英萨监测数据,对高铁沿线地面沉降现状及影响因素进行概要分析,并采用水土耦合模型结合反分析方法,对主要路段的地面沉降趋势进行预测,分析不同时期内的沉降变化及其对线路坡度的影响。进而提出沉降路段设立禁采区、限采区和控采区方案,以及采用有砟轨道、简支结构桥梁及可调高支座、加宽路基和预留高程等工程措施,可为雅万高铁地面沉降防治提供依据。

The Analysis of Ground Subsidence along Jakarta-Bandung High-speed Railway and Main Control Measures

The Jakarta-Bandung High-speed Railway passes through two major land subsidence areas of Jakarta and Bandung. Therefore,it is of great significance to carry out surveys and predictions of land subsidence and take timely countermeasures for guiding the design, construction, operation and maintenance of railway projects. Based on the investigation and research data of the local hydrogeology,engineering geology and environmental geology in Jakarta and Bandung, and combined with the engineering survey and the monitoring data,the present situation and influencing factors of the ground subsidence along the high-speed railway are briefly analyzed,and the trend of the land subsidence along the main sections of the railway is predicted by a soil-water coupled model with inverse analysis method,and the settlement changes in different periods and their influences on the route slope are analyzed.Further proposals are made for the establishment of forbidden exploitation area,limited exploitation area and controlled exploitation area along the settlement sections. Engineering measures such as using ballast track,freely supported structure bridges and adjustable height bearings,widening embankment and reserving elevations are taken to provide basis for prevention and control of land subsidence along the high-speed railway.