Experimental Study on Characteristics of Filter Cake Formation in Slurry Shield Tunnelling Based on “Cutter-Soil” Interaction

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-07 DOI:10.1007/s12205-024-0189-2

Yang Bai, Yapeng Li, Lei Li

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Abstract

In recent years, more and more river-crossing and sea-crossing underwater tunnels have become the first choice for the construction of large channels in regions with developed river system. Relying on its superior pressure control mode and high security, Slurry Pressure Balance shield (SPB) is widely used in the construction of underwater tunnels with large cross-sections. The filter cake is an important medium to guarantee the stability of the excavation in SPB tunnelling. However, the mechanism of cutter on soil and filter cake (the interaction of “cutter-soil”) are still unclear. In this study, a self-made test apparatus based on the interaction of “cutter-soil” is presented. The experiment results revealed that “cutter-soil” interaction, compared to cases without the interaction, reduced the impermeability and effective stress conversion rate of filter cake, which is unfavorable to guarantee the stability of the tunnel face. To overcome this problem, two methods were proposed: continuous injection of slurry with different densities and increasing the coarse particles of slurry. It is shown that the methods have improved filter the impermeability of cake formation, which contributes to the stability of the shield excavation face.

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基于 "刀具-土壤 "相互作用的泥浆护盾掘进中滤饼形成特征的实验研究

近年来，越来越多的过江、过海水下隧道成为河流水系发达地区大型渠道建设的首选。泥浆压力平衡盾构机（SPB）凭借其优越的压力控制方式和较高的安全性，在大断面水下隧道施工中得到了广泛应用。滤饼是保证 SPB 隧道开挖稳定性的重要介质。然而，铣挖机对土壤和滤饼的作用机理（"铣挖机-土壤 "相互作用）尚不清楚。本研究提出了一种基于 "铣挖机-土 "相互作用的自制试验装置。试验结果表明，"刀-土 "相互作用与无相互作用的情况相比，降低了滤饼的抗渗性和有效应力转换率，不利于保证隧道工作面的稳定性。为克服这一问题，提出了两种方法：连续注入不同密度的泥浆和增加泥浆的粗颗粒。结果表明，这两种方法都改善了滤饼形成的抗渗性，有助于盾构开挖面的稳定性。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.