拱圈衬砌 meaning in English

arch lining

In this article , according to the execution example on arch ring lining crack defect at some certain single - track railway mountain tunnel , a brief introduction is given to the cause of formation , disposal technique and construction points for attention on this kind of defect
摘要根据某铁路山岭单线隧道拱圈衬砌裂缝病害整治施工实例，简单介绍了病害成因、整治技术及施工注意事项。