摘要
研究目的:高速铁路无砟轨道路基工程变形控制要求极为严格,为保证列车运营的舒适性、安全性,运营高速铁路几乎不允许路基出现任何变形。某高速铁路在运营过程中一段路堑边坡坍滑变形,严重影响其运营安全,针对该段高速铁路行车密度大、行车时速高、施工风险大的特点,提出微扰动非开挖支挡结构与风险管理相结合的处理方案。研究结论:(1)采用钢管微型桩跟管钻进潜孔钻施工后再通过锁口梁连成整体,可以有效遏制边坡变形、提高边坡稳定性,施工过程中对路基边坡扰动小,是高铁变形病害整治的一个重要原则和思路;(2)运营高速铁路变形病害整治施工风险安全等级高,将风险管理理念纳入工程设计领域,对治理方案风险因素进行了识别,并制定了详实的风险处理对策,是确保高铁变形病害整治成功的关键措施;(3)整治工程实施后路堑边坡变形得到了有效遏制,至今路堑变形稳定,实现了行车条件下高速铁路无砟轨道路堑边坡变形病害的整治,微扰动非开挖支挡结构与风险管理相结合的高铁变形病害整治技术可为今后高铁路堑变形病害治理提供参考和借鉴。
Research purposes： The deformation control requirements of high - speed railway ballastless track subgrade engineering are very strict. To ensure the comfort and safety of the train operation, the subgrade of high - speed railway with operation does not allow any deformation. After a high - speed railway was opened to traffic, a section of cutting slope was obviously deformed and destroyed, which seriously affect its operational safety. In view of the characteristics of high density of train operation, high speed and high construction risk, a treatment scheme combining micro disturbance non -excavation retaining structure with risk management is put forward. Research conclusions：（ 1 ） The slope deformation was controlled and the slope stability was improved, after using the steel pipe micro pile with DTH drill and through the lock beam connected into a whole part. The disturbance of subgrade slope is small in construction process of this technology, which is an important principle and conception for the treatment of high speed railway deformation diseases. （2） The construction risk of high speed railway deformation treatment is very high, and the risk management concept should be taken into account to the engineering design. To ensure the success of the treatment of high speed railway deformation diseases, the risk factors of the treatment scheme should be identified, and the detailed risk treatment measures should be formulated. （3） After construction, cutting deformation was controlled. The treatment technology of high speed railway deformation diseases combining micro disturbance non - excavation retaining structure with risk management can provide reference for the future high railway cut deformation treatment.
出处
《铁道工程学报》
EI
北大核心
2017年第11期18-22,94,共6页
Journal of Railway Engineering Society
基金
铁四院科技研究开发计划:膨胀岩高边坡加固技术研究(2015K22)
重载铁路路基膨胀土改良技术研究(2017K025)
关键词
高速铁路
无砟轨道
路堑变形病害
非开挖支挡结构
微扰动技术
跟管钻进钢管微型桩
high speed railway
ballastless track
cutting deformation hazard
non - excavation retaining structure
microdisturbance technique
micro pile using pipe -following drilling method
