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注浆是目前修建隧道与地下工程的一项重要辅助工法。黄土水泥浆液具有成本低廉、就地取材、工艺简单等优点,本文以六盘山隧道衬砌壁后注浆材料为研究对象,通过大量室内试验对黄土-水泥浆液的比重、结石率、凝胶时间、粘度、强度和渗透性进行测试。试验结果表明:黄土-水泥试样随着水玻璃的增加其比重逐渐增大,随着水固比的增大比重逐渐减小;水玻璃的加入对结石率影响较大;粘度随着水固比的增加而减小;浆液结石体的单轴抗压强度随着水固比的增加而减小,随着固相比的减小而减小;通过掺加水玻璃可以调节浆液的凝胶时间,渗透系数随着龄期的增加而减少,随着固相比的增加而减小,随着水固比的增大而增大,结石体的抗渗性能好。本文可为类似工程提供借鉴,而黄土-水泥浆液作为一种新型低成本注浆材料具有广阔的发展前景。
Grouting is an important auxiliary method for tunnel construction and underground engineering. The loess cement slurry has the advantages of low cost, local materials, simple process and so on. In this paper, the research on the grouting material of the lining wall of Liupanshan tunnel is carried out. Through a large amount of indoor tests, the specific gravity, the rate of stone, the gel time, Viscosity, strength and permeability were tested. The results show that the specific gravity of loess-cement samples increases with the increase of water glass, and the specific gravity decreases with the increase of water-solid ratio. The addition of water glass has a great influence on the rate of stone formation. The uniaxial compressive strength of slurry stone decreases with the increase of water-solid ratio and decreases with the decrease of solid-phase ratio. The gel time of slurry can be adjusted by adding water glass , The permeability coefficient decreases with the increase of age, decreases with the increase of solid-phase ratio, increases with the increase of water-solid ratio, and the permeability of stone body is good. This paper can provide references for similar projects, while loess-cement grout has a promising prospect as a new low-cost grouting material.