高落差长溜管在长隧洞混凝土运输中的应用

在地形复杂的山区，水利水电工程隧洞普遍存在单条隧洞长、施工支洞间距大、断面小、施工干扰因素多等不利于施工组织的情况。采用竖井溜管进行隧洞混凝土垂直运输，在不增加施工支洞的前提下增加了混凝土衬砌工作面、减少了施工干扰，从而可以有效地解决上述问题，加快工程进度。研究发现，利用H型缓降器能有效控制高落差条件下的混凝土下落速度，因此解决了混凝土拌和物对溜管及受料搅拌车的磨损及击打破坏问题，保证了设备使用寿命、施工安全及混凝土工程质量。 In the mountain area with complex terrain, the water conservancy and hydropower engineering tunnel generally has the following unfavorable characteristics for construction including the existence of a long single tunnel, large spacing between construction adits, small cross-section, and construction interference. The application of shaft articulated chute for vertical transportation of concrete within the tunnel can effectively solve the above problems and expedite the construction progress, because it can increase the working face of concrete lining and decrease construction interference without adding construction adits. Moreover, the utilization of H-type descent control device can effectively control the descending velocity of concrete under high-drop conditions; therefore it can solve the problems of wearing, impacting, and damaging of articulated chute and the receiving mixer truck caused by concrete mixture, and can guarantee the equipment service life, construction safety, and concrete engineering quality.