Researches On High-speed Railway Subgrade Settlement Treatment Technology

In order to achieve fast, safe and comfortable transportation requirements, we must ensure that high-speed railway embankment with a high degree of stability. However, in the long-term effect of high-speed vehicle impact loads and complex environment, subgrade settlement deformation is inevitable, seriously endanger the safe operation of trains and roadbed stability.Therefore, this article according to China’s high-speed rail high grid density, short skylight point in time, the maintenance tasks are arduous actual situation, carry out remediation technology research high-speed railway subgrade settlement diseases,in order to achieve high-speed rail line maintenance engineering structures disease early, quick remediation to meet future high-speed rail line fast regulation and repair needs.Through literature research and field trials, combing the types and distribution of the current high-speed railway subgrade settlement diseases structures exist manifestations.Subgrade settlement mechanism of the disease have on the analysis, and on the basis of selected high-speed railway subgrade settlement Damage Treatment of materials and supporting the construction equipment, raised a more complete high-speed railway subgrade settlement Damage Treatment program and its technical quality improvement prosecution techniques, and to develop related diseases remediation process.The main work is as follows:(1)Conducted a high-speed railway subgrade settlement of domestic and international state of the art renovation disease investigation and analysis,By studying the current problems and shortcomings of Settlement Defect Treatment Technology, proposes a high-speed railway subgrade settlement Disease Treatment of the basic principles and requirements.(2)Analyze ballastless subgrade structure by software ANSYS, and to study the differential settlement of subgrade on static track structure of law,It found that when the void caused by subsidence occurred in the bottom part of the support layer expansion joints, the internal forces and displacements will have an upper track structure have serious adverse effects.(3)According subgrade settlement types and causes of the disease, Proposed mechanical lifting and filling grouting remediation programs for high-speed railway subgrade settlement diseases,Selected polymer grouting filler and ancillary construction equipment,and developed a remediation process for the settlement of roadbed.(4)In order to achieve the improvement of the quality of the prosecution of the disease after the repair,Proposed elevation of the track panels, track panels stress, grouting filling quality repair prosecution program. Study on the hydraulic pressure sensor, vibrating wire sensors, ground penetrating radar technology for the quality of prosecution,And in the field to verify the feasibility of the quality of the prosecution program.