一、前言:隧道开挖工作结束后,必须紧接着进行衬砌,以免围岩因暴露时间过长而降低其稳定性。衬砌的类型有石砌衬砌,混凝土衬砌、喷射混凝土衬砌、喷锚衬砌等。地下长隧道施工中,通常采用混凝土衬砌。灌筑混凝土衬砌工艺主要包括:立模、混凝土搅拌、混凝土运送、混凝土灌筑、混凝土养护及拆模等工序。为了加快施工进度和缩短围岩暴露时间,要求实现衬砌作业的综合机械化。运送衬砌混凝土的方案有好几种,但适用于长隧道的实际可行方案不多,如:1、用混凝土泵运送这种方法虽然设备比较简单,但泵送距 I. Foreword: After tunnel excavation, the lining must be followed immediately to prevent the surrounding rock from decreasing its stability due to the exposure time is too long. Lining types of stone lining, concrete lining, shotcrete lining, spray anchor lining. In underground tunnel construction, concrete lining is usually used. Lining concrete lining technology mainly includes: legislation, concrete mixing, concrete delivery, concrete filling, concrete maintenance and demolition of the mold and other processes. In order to speed up the construction progress and shorten the surrounding rock exposure time, it is required to realize the comprehensive mechanization of lining work. There are several solutions for transporting lining concrete, but practical solutions for long tunnels are few, such as: 1, with concrete pump delivery Although this equipment is relatively simple, but the pumping distance