既有铁路隧道排水沟冻害原因及处置措施  

Freezing Damage Cause of Drainage Ditch in Existing Railway Tunnels and Its Treatment Measures

作　　者：李尧 LI Yao(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2021年第4期48-51,共4页Railway Engineering

基　　金：中国铁道科学研究院集团有限公司基金(2020YJ099)。

摘　　要：针对一座既有寒区铁路隧道出现的排水沟及道床冻害问题,通过对病害情况及隧址气候条件进行调研,从气候、设计、施工等方面进行分析,得到冻害产生原因主要有以下方面:现场实际气候条件较设计依据更为恶劣且存在季节风影响;设计存在局限性,未考虑隧址风力、寒冷月主导风向等因素的影响;施工质量粗糙导致排水不畅。在原因分析的基础上,提出了排水沟电伴热板辅热整治方案,经现场实施验证取得了良好的效果。Aiming at the freezing damage problem of drainage ditch and ballast bed in an existing railway tunnel in cold area,through investigation of the disease and the climatic conditions of the tunnel site,the climate,design,construction and other aspects were analyzed to obtain the main causes of freezing damage as follows.The actual climatic conditions on site are more severe than the design basis,and there are seasonal wind effects.The design has limitations,and the influence of wind force at tunnel site and dominant wind direction in cold month is not considered.The poor construction quality leads to the poor drainage.Based on the analysis of the causes,the auxiliary heat treatment scheme of the electric heat tracing plate of the drainage ditch is put forward,and the good results are obtained through the field implementation.

关 键 词：铁路隧道 冻害 调研分析 排水沟 水沟加热 寒区 电伴热系统 风力 风向 气候条件 

分 类 号：U453.6[建筑科学—桥梁与隧道工程]