The project with tunnel lengh 580m, lies in Dajiangshan road and Oingxi road in Huaxi, has a six-lane, large-spanned, small spacing tunneling design with Twin-hole and Twin-line; Since the two HP-3017 wet shotcreting machines started work in April 2018, the spraying volume is more than l 800m3 per month. The maximum spraying volume is 25m3/h. The rebound rate of shotcrete can be controlled within 15%, which provide a powerful guarantee for the safe tunneling. 

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