某客专路基变形病害整治技术研究

Research on the Remediation Technology on Subgrade Deformation Disease of a Passenger Dedicated Line

研究目的:为保证高速行车安全。高速铁路无砟轨道路基工后沉降控制要求极为严格。某客专建成通车后,某车站部分路基出现近80衄的水平变形,大大超过规范允许值,严重影响高速列车安全运营,在没有工程经验可供借鉴的条件下,需要采取合理措施对该段路基水平变形异常段落进行整治。研究结论:针对路基横向变形病害进行了整治,取得了良好的效果,得出以下结论:(1)以高压旋喷桩进行路基横向变形病害治理是可行的,通过施工时产生的侧向推力可以缓慢而有效的挤压及推动地基土进行纠偏;(2)采用的以水准测量为主、轨道检测和土层深部位移监测及孔隙水压力监测为辅的监测系统,切实有效地保证了施工安全;(3)建立的系统的预警预报程序和管理体系是保证治理工程顺利实施的管理措施;(4)该研究成果可在无砟轨道路基变形病害治理领域推广应用。

Research purposes： To ensure high - speed train running safety, the control requirement of settlement after construction of the ballastless subgTade is very strict. The abnormal deformation is found in a station of a passenger dedicated line, and the maximum horizontal displacement is nearly 80 mm which is much higher than the norm allowable value and seriously affects the safe operation of high - speed trains. So the reasonable measures must be taken to renovate the horizontal section subgrade deformation exception paragraph. Research conclusions：The treatment technique of abnormal deformation is very success. The conclusions are as follows：（1） It is feasible to control the lateral deformation of subgrade with high pressure jet grouting pile. The lateral thrust generated by the construction can be carried out slowly and effectively. （2） The monitoring system, which contains leveling, track monitoring car, deep soil layer displacement monitoring and pore water pressure monitoring, has been adopted to ensure the construction safety. （3） The early warning and forecasting procedure and management system are established, which ensure the implementation of the remediation technique. （4） This research provides a useful reference for the disease treatment of high - speed railway subgrade deformation.