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在我国一些地下工程中因地质情况特殊,出现“灰包石”石膏质岩,其具有膨胀性,且水溶液具有硫酸盐腐蚀性,对混凝土结构物长期作用并腐蚀破坏,损失巨大。本文以宜巴项目凉水井隧道膨胀性岩段衬砌C35抗渗抗腐蚀混凝土施工为例,从混凝土性能着手,通过调整配比及外加剂,提高混凝土等级及防水抗腐蚀的能力,取得了较好的效果,并总结施工控制要点,供类似工程施工提供依据。
In some underground engineering in our country, because of the special geological conditions, there appears “gabbro” gypsum rock, which has expansibility and the sulfate solution is corrosive to the aqueous solution. Taking the C35 anti-seepage and anti-corrosion concrete lining construction of the expansive rock section of the Liangshuijing tunnel in Yiba project as an example, the concrete performance is taken as an example. By adjusting the ratio and admixture, the grade of concrete and the ability of waterproofing and corrosion resistance are better. Effect, and summarizes the construction control points for the construction of similar projects provide the basis.