立井施工工艺与支护材料的下料方式密切相关。过去曾提倡在井内采用管路输送混凝土,虽有不占用提升装置、工序简单及供料连续的优点,但由于管内混凝土靠自重下降,影响出料口的操作安全,也容易出现混凝土离析现象及管路堵塞、磨漏等问题。而且由于近年来大型深井施工数目不断增多,上述输料管下料缺点就更为突出。 Vertical shaft construction technology and support material cutting method is closely related. In the past, pipelines were used to convey concrete in the well. Although it does not occupy the advantages of lifting device, simple operation and continuous feeding, the segregation of concrete tends to occur due to the decrease of dead weight of concrete in the pipe and the safety of the discharge port. Pipeline blockage, abrasion and other issues. Moreover, due to the increasing number of large-scale deep-well construction in recent years, the shortcomings of the above material feeding pipe are even more outstanding.