盾构空推过矿山法隧道同步注浆浆液配合比研究及应用

发布时间：2018-07-02 20:14

本文选题：盾构隧道 + 空载推进　；参考：《武汉工程大学》2014年硕士论文

【摘要】：盾构法越来越广泛地被应用在我国地下工程施工中，已经成为地铁隧道等建设的主流工法。用盾构机隧道施工时，盾构机向前推进，管片衬砌环从盾尾脱出，就会不可避免地在围岩与管片外侧之间形成盾尾空隙，因此盾尾同步注浆成为盾构施工必不可少的环节。通常向管片与岩层之间的空隙注入注浆材料，以此达到控制地层变形的目的。本文针对武汉地铁3号线盾构空推过矿山法隧道同步注浆的要求，要得到适用于此区间工程的浆液，要求浆液可泵性强、稳定性高、凝结时间适当，浆液的流动性、强度、充填性三者之间可以协调。调研我国的地下工程同步注浆的施工资料，，本文采用水泥、粉煤灰、膨润土、砂和水为原材料配制单液活性水泥砂浆同步注浆浆液，并设计了16组正交试验，分析了浆液各原材料对浆液稠度、胶凝时间、泌水率、固结收缩率和抗压强度等工程性能的影响规律，并提出了现场试验用基准配合比，通过结合室内试验研究与基准配合比在现场的应用情况，改良了浆液配合比，确定了盾构空推过矿山法段的同步注浆参数，并提出施工工艺。为今后类似工程的同步注浆浆液的配合比设计及应用提供了参考。
[Abstract]:Shield method is more and more widely used in the construction of underground engineering in China, and has become the mainstream method of subway tunnel construction. When the shield machine is used in tunnel construction, the shield machine advances forward and the segment lining ring comes out from the shield tail, which inevitably forms the shield tail gap between the surrounding rock and the outside of the segment, so the synchronous grouting of the shield tail becomes an essential link in the shield construction. Grouting materials are usually injected into the voids between segments and strata to control formation deformation. In this paper, according to the requirement of synchronous grouting of shield tunneling through mine tunnel of Wuhan Metro Line 3, the slurry which is suitable for the project of this section should be obtained, which requires that the slurry can be pumped strongly, has high stability, proper setting time, fluidity and strength of the slurry. Filling can be coordinated among the three. In this paper, cement, fly ash, bentonite, sand and water are used as raw materials to prepare single liquid active cement mortar synchronous grouting, and 16 groups of orthogonal tests are designed. The effects of different raw materials on the properties of slurry, such as consistency, gelation time, bleeding rate, consolidation shrinkage rate and compressive strength, were analyzed, and the reference mix ratio for field test was put forward. Based on the laboratory test and the application of the standard mix ratio in the field, the slurry mixture ratio is improved, the synchronous grouting parameters of the shield tunneling through the mine section are determined, and the construction technology is put forward. It provides a reference for the design and application of synchronous grouting mixture in similar projects in the future.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.43

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