Model test on cutterhead-soil interaction during shield tunneling and its theoretical model

IF 8.2 1区 工程技术 Q1 ENGINEERING, CIVIL Underground Space Pub Date : 2024-07-16 DOI:10.1016/j.undsp.2024.03.006
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Abstract

This study aims to develop a rational theoretical model for cutterhead-soil interaction. The cutterhead-soil interaction mechanism is divided into two components: the cutting action of the cutter on the soil and the extrusion of the cutterhead on the soil. By enhancing the Mckyes–Ali model, we analyze and deduce the force state of the cutter during shield tunneling, obtaining a calculation method for determining the force on the cutter. Additionally, we conduct an in-depth analysis of the extrusion effect of the cutterhead on the soil during shield tunneling, utilizing the fundamental solution of the Kelvin problem. Based on these theoretical calculations, we validate the tunneling thrust and cutterhead torque of the shield using our self-developed multi-functional large-scale shield tunneling test platform. The test results demonstrate that the tunneling thrust and cutterhead torque derived from the established cutterhead-soil interaction model in this paper are relatively close to the experimental monitoring values. This provides a theoretical foundation for establishing reasonable shield tunneling loads.

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盾构掘进过程中刀头与土壤相互作用的模型试验及其理论模型
本研究旨在建立刀盘与土壤相互作用的合理理论模型。刀盘与土体相互作用机理分为刀盘对土体的切削作用和刀盘对土体的挤压作用两部分。通过改进 Mckyes-Ali 模型,我们分析并推导了盾构掘进过程中刀盘的受力状态,获得了确定刀盘受力的计算方法。此外,我们还利用开尔文问题的基本解法,深入分析了盾构掘进过程中刀盘对土体的挤压效应。在这些理论计算的基础上,我们利用自主研发的多功能大型盾构掘进测试平台验证了盾构的掘进推力和刀盘扭矩。试验结果表明,本文建立的刀盘与土体相互作用模型得出的掘进推力和刀盘扭矩与实验监测值比较接近。这为建立合理的盾构掘进载荷提供了理论基础。
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来源期刊
Underground Space
Underground Space ENGINEERING, CIVIL-
CiteScore
10.20
自引率
14.10%
发文量
71
审稿时长
63 days
期刊介绍: Underground Space is an open access international journal without article processing charges (APC) committed to serving as a scientific forum for researchers and practitioners in the field of underground engineering. The journal welcomes manuscripts that deal with original theories, methods, technologies, and important applications throughout the life-cycle of underground projects, including planning, design, operation and maintenance, disaster prevention, and demolition. The journal is particularly interested in manuscripts related to the latest development of smart underground engineering from the perspectives of resilience, resources saving, environmental friendliness, humanity, and artificial intelligence. The manuscripts are expected to have significant innovation and potential impact in the field of underground engineering, and should have clear association with or application in underground projects.
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