铁路运营对红柳至一里坪线雅丹密集区的振动影响分析

Analysis on Vibration Influence of Hongliu to Yiliping Line in Intensive Areas with Yardangs by Railway Operations

雅丹作为一种典型的风蚀地貌,对外界的动力干扰较为敏感。穿过雅丹密集区的铁路建成投入运营后,机车通过时引起的场地振动势必会对周围雅丹产生一定的影响,甚至可能导致雅丹发生失稳和破坏,不利于对雅丹地貌的保护。为减轻铁路运营对雅丹地貌的影响,利用强震动观测原理,选取既有相同的运营铁路——青海省海北藏族自治州境内柴达尔铁路南段进行了机车振动实时测试,对机车振动影响进行了科学评估,初步得到了场地振动加速度衰减规律及其与机车运行速度的关系,从而为机车通过雅丹密集区时运行时速限制的设定提供科学的参考依据。

As a typical erosion landform,yardang is sensitive to outside interference. After railway had been built and put into operation in intensive areas with yardangs,site vibrations caused by passing trains would have certain effects on the around yardang and may even lead to destabilization and destruction in Yadan,so as to it is not conducive to the protection of yardang landform. In order to reduce effect of railway operation on Yadan landforms,based on strong vibration observation principle,selecting existing same operation railway,locomotive vibration real-time tests were made along Chai Daer railway south section in Haibei Tibetan autonomous territory Qinghai province. Locomotive vibration effects had been assessed scientifically,the relationships between site vibration acceleration attenuation laws and locomotive run speed had been gotten originally. So it provides science references to run speed limit for passing locomotives in intensive areas with yardangs.