线性工程有轨出渣技术的研究与应用

Research and Application of Linear Engineering Tracked Deslagging Technology

贵州省夹岩水利枢纽工程北干渠6标段总长度15.583 km,其中有主隧洞4座,圆形断面,洞径6.0～6.2m,总长达14833 m,是典型的线性工程。施工支洞3条,均为斜井,坡度大。主洞单头掘进最长达2000m以上,钻爆开挖通风排烟困难,洞渣运输耗时长,对作业人员健康及工期影响很大。因此采用合适的出渣方式将爆后石渣迅速运出洞外,是提高隧洞掘进速度的关键环节,也是小型长隧洞实现高效施工及成本控制的关键。

Total length of section No. 6 of north m ain channel of Jiayan water conservancy key project of Guizhou is 15.583 km, including four main tunnels with circular sections, with diameter of 6.0-6.2 m, total length of 14833 m, which is a typical linear project. There are three construction branches of inclined shafts with steep slope. Single-end tunnelmg of m ain tunnel can reach more than 2000 m. It is difficult to ventilate and exhaust smoke during drilling and blasting excavation, which has great influence on worker's health and duration for long time of slag transportation. Therefore, it is the key link to improve tunneling speed and realize high-efficiency construction and cost control of small and long tunnels to transport blasted slag out of the tunnel quickly with appropriate deslagging method.