无碴轨道涵洞地基加固及沉降控制

研究目的:在客运专线无碴轨道的设计中,探讨涵洞的地基加固处理方法沉降控制的要求。研究方法:分析涵洞工后沉降的组成,考虑路基沉降与线路不平顺发展的维修能力,以及根据前期建设投资与后期养护费用的经济比较,得出比较合理的无碴轨道涵洞工后沉降量的范围。研究结果:通过系统的分析比较,涵洞地基加固处理常用两类方法:一是排水固结法,二是复合地基法。涵洞位于不同的地基土和不同的加固处理方法应选择合适的计算理论进行相应的沉降计算。研究结论:因为沉降计算理论具有一定的局限性,工后沉降的预测应以施工中的沉降观测为主,根据实测数据进行理论分析、修正计算、预测工后沉降量。

Improvement and Settlement Control of the Foundation of Ballastless Track Culvert

Research purposes: In the design of ballastless track of passenger dedicated railway line,this paper discusses how to improvement and settlement control of the foundation of culvert.Research methods:Based on analyzing the component of the culvert settlement after construction,considering the roadbed settlement,unevenness development and mainantenance capacity,and comparing the investment of prophase construction to the maintenance costs,the reasonable quantity of the settlement after construction for the culvert of(ballastless) track are gained.Research results:Through systematically analyzing and comparing,the general measures of culvert foundation improvement are drainage and consolidation method and complex foundation method.According to the roadbed soil type and foundation improvement method,relevant computational theory can be selected to calculate settlement.Research conclusions:Because of localization of the settlement computational theory,observation in site should be given priority in the forecast of the settlement after construction.Based on analyzing the observation data,the settlement after construction can be forecasted.