APPLICATION OF THE ADVANCED SMALL PIPE GROUTING ON HYDRAULIC TUNNEL CONSTRUCTION OF GRAVEL STRATUM

This paper, based on the test section of the culvert tunnel of Fushi road sand pit on the flood storage project of sandpit of the western suburbs of Beijing, do the field test of advanced small pipe grouting on the shallow hydraulic tunnel of gravel strata. Based on the test results, this paper gets the key parameters of the tunnel grouting mixture ratio, grouting volume ratio, the extent, et al. It provides a basis for the construction safety of tunnel excavation and schedule optimization. The method and conclusion of research will be valuable experience and for reference in design, construction, supervision and further theoretical research on tunnel engineering under similar condition.