超前小导管注浆在卵砾石地层水工隧洞施工中应用

结合北京西郊砂石坑蓄洪工程的阜石路砂石坑暗涵隧洞试验段工程实践, 对卵砾石地层浅埋水工隧洞进行了超前小导管注浆的现场试验工作。文章基于试验成果, 得到了该隧洞地层注浆配比、注浆量、影响范围等关键参数, 为隧洞开挖安全施工和进度优化提供依据。研究的方法及结论可为类似条件下隧洞工程的设计、施工和进一步的理论研究提供参考和借鉴。

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.