一、概述 利用废旧钢轨底镶入灰坑内壁用以保护混凝土坑壁,增强灰坑的坚固性,延长其使用寿命,更好地为运输生产服务。 灰坑是铁路建筑设备的薄弱环节,由于机车上水,其废水不可避免地会流入坑内,因机 First, an overview of the use of scrap rail inlaid into the gray pit inner wall to protect the concrete pit wall, and enhance the rugged pits, to extend its service life, to better transport services. Gray pit is the weak link of railway construction equipment, due to locomotive water, the wastewater will inevitably flow into the pit, due to the machine