武汉市中一路下穿铁路既有线的沉降分析

发布时间：2018-04-16 03:23

本文选题：顶进施工 + 工后沉降　；参考：《武汉理工大学》2014年硕士论文

【摘要】：随着快速客运交通以及市政工程建设的迅速发展，越来越多的铁路平交道口正在不断地被立交路口取代。铁路沿线出于安全舒适、美观稳定、服务年限的考虑，对沉降控制提出了极高的要求。本文基于武汉市中一路（发展大道～幸福大道）下穿铁路既有线工程，分析了顶进施工工艺流程，以沉降变形为主要控制目标，，研究了铁路、公路线路沉降变形机制，对各个时间段内的路基沉降量进行了数据监测分析与数值模拟预测，特别是对于汽车、列车动载以及二者叠加作用对路基沉降的影响进行了有力探索。对沉降机理进行了探讨，分析了影响沉降的主要因素，有针对性地提出了相应的解决方法和处理意见。通过对立体交通系统工后沉降的科学、有效的预测与强力、严格的控制，对于目前快速交通系统的设计、施工，道路系统的改造、升级，以及后期运营的保养、维护，具有较大的理论意义和巨大的社会、经济效益。本文得出了以下结论：（1）汽车在动载条件下产生的沉降比静载时产生的沉降略大。汽车在速度为15m/s时动载及静载产生的沉降分别为0.9958mm和0.9939mm。（2）速度较小时，在相同速度下，汽车荷载产生的路基沉降比列车荷载大。速度较大时，在相同速度下，列车荷载产生的沉降远大于汽车荷载。（3）路基沉降随着汽车、列车运行速度的增加而不断增大，随着土层深度的增加而不断减小。汽车和列车在路基顶部产生的沉降分别达到0.9mm和0.6mm。（4）汽车和列车共同作用时产生的路基沉降比汽车、列车单独作用时产生的沉降要大。不同的汽车、列车的速度组合，产生的路基沉降不同。路基沉降受汽车荷载的影响较大。
[Abstract]:With the rapid development of rapid passenger transportation and municipal engineering construction, more and more railway level crossings are being replaced by interchanges.Due to the consideration of safety, comfort, beauty and service life along the railway line, the settlement control is required very high.Based on the existing railway line project of Zhongyi (Development Avenue to Happiness Avenue) in Wuhan City, this paper analyzes the technological process of jacking construction, taking settlement deformation as the main control object, and studies the settlement deformation mechanism of railway and highway lines.Data monitoring analysis and numerical simulation prediction of subgrade settlement in each time period are carried out especially for the dynamic load of vehicle train and the effect of superposition of both on subgrade settlement.The settlement mechanism is discussed, the main factors affecting the settlement are analyzed, and the corresponding solutions and treatment suggestions are put forward.Through the science of post-construction settlement of the three-dimensional traffic system, effective prediction and strong force, strict control, the design, construction, reconstruction, upgrading of the road system, and maintenance and maintenance of the later period of operation,It has great theoretical significance and huge social and economic benefits.This paper draws the following conclusions:1) the settlement of automobile under dynamic load is slightly larger than that under static load.When the vehicle speed is 15m/s, the settlement caused by dynamic load and static load is 0.9958mm and 0.9939mm.At the same speed, the subgrade settlement caused by the vehicle load is larger than the train load.At the same speed, the settlement caused by train load is much larger than that of vehicle load.3) the subgrade settlement increases with the increase of vehicle and train speed, and decreases with the increase of soil depth.The settlement of automobile and train on the top of roadbed reached 0.9mm and 0.6 mm. respectively.4) the settlement of roadbed caused by the joint action of vehicle and train is larger than that of vehicle and train acting alone.Different cars, train speed combination, resulting in different subgrade settlement.Subgrade settlement is greatly affected by vehicle load.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1;U213.157

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