本文關(guān)鍵詞：高抗?jié)B注漿材料在水下地鐵隧道地層加固中的研究與應(yīng)用　出處：《隧道建設(shè)》2017年08期 　論文類型：期刊論文

  更多相關(guān)文章： 注漿材料 抗?jié)B性能 流動(dòng)度 凝結(jié)時(shí)間

【摘要】：為探討高抗?jié)B注漿材料在水下地鐵隧道地層加固中的應(yīng)用,采用普通水泥漿液摻加無堿速凝劑和高效減水劑的形式制備高抗?jié)B注漿材料,通過室內(nèi)試驗(yàn)分析普通水泥漿液在不同外加劑摻量條件下的漿液性能,以凝結(jié)時(shí)間、流動(dòng)度和抗?jié)B性能為主要指標(biāo)對(duì)漿液的配比進(jìn)行設(shè)計(jì)。室內(nèi)試驗(yàn)結(jié)果表明,水灰比在0.65~1.0,調(diào)整漿液配合比,漿液流動(dòng)度可達(dá)到230~270 mm,初凝時(shí)間小于2 h,抗?jié)B等級(jí)大于P8,滿足施工要求。在廈門地鐵3號(hào)線五緣灣站—會(huì)展中心站區(qū)間斜井暗挖隧道現(xiàn)場(chǎng)2個(gè)循環(huán)注漿試驗(yàn)中,確定了3種注漿配比的應(yīng)用條件,通過加固體強(qiáng)度和抗?jié)B性2項(xiàng)指標(biāo)實(shí)驗(yàn)分析,驗(yàn)證了高抗?jié)B注漿材料具有良好的抗?jié)B及加固地層效果。
[Abstract]:In order to discuss the application of high impermeability grouting material in the ground reinforcement of underwater subway tunnel, the high permeability grouting material was prepared by mixing ordinary cement slurry with alkali free accelerator and high efficiency water reducing agent. This paper analyzes the slurry performance of ordinary cement slurry under different admixtures through laboratory tests, and designs the ratio of slurry with setting time, fluidity and impermeability as the main index. The results of laboratory test show that. When the water-cement ratio is 0.65 ~ 1.0, the fluidity of the slurry can reach 230 ~ 270mm, the initial setting time is less than 2 h, and the anti-seepage grade is larger than P8. In order to meet the construction requirements, the application conditions of three grouting ratios have been determined in the field of two circulating grouting tests in the underground excavation tunnel between Wuyuanwan Station and Exhibition Center Station of Xiamen Metro Line 3. Through the experimental analysis of two indexes of solid strength and impermeability, it is proved that the high impermeability grouting material has good impermeability and reinforcement effect.
【作者單位】： 中鐵隧道集團(tuán)有限公司勘測(cè)設(shè)計(jì)研究院;
【分類號(hào)】：U231.3;U455.49
【正文快照】： 0引言隧道近海域段、斷層破碎帶及接觸帶受構(gòu)造影響嚴(yán)重,巖體破碎,自穩(wěn)能力和抗風(fēng)化能力很差,風(fēng)化深度大,常在海底形成風(fēng)化深槽。無論是斷層破碎帶還是風(fēng)化深槽,都對(duì)隧道施工產(chǎn)生不利影響。加上隧道埋設(shè)在海平面幾十米以下,圍巖承受著巨大的海水壓力作用,施工開挖中極易產(chǎn)生坍

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