论文部分内容阅读
双线铁路隧道在施工阶段,多次坍塌,危及人身安全,耽误宝贵时间,造成经济损失。已建成的单线铁路隧道,有的道床上鼓,连年整治,给运营带来很大困难。坍塌的原因很多,施工阶段缓建仰拱或设计上根本不设计仰拱,对通过松散或软弱围岩的隧道,可能是主要原因。为了集中精力,本文仅介绍仰拱的作用,形式,尺寸以及有代表性的实例,及时修建仰拱,防止坍塌。
During the construction phase, the double-track railway tunnel collapsed several times, endangering personal safety, prolonging precious time and causing economic losses. The completed single-track railway tunnel, some Road bed drum, year after year remediation, to the operation of a great difficulty. There are many reasons for the collapse. During the construction phase, the inverted arch or the design does not design the inverted arch at all, which may be the main reason for the tunnel passing loose or weak surrounding rock. In order to concentrate, this article only describes the role, form, size and representative examples of inverted arch, in time to build inverted arch to prevent collapse.