Analysis of the influence of uneven settlement on the existing shield tunnel lining

IF 0.3 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI:10.23967/j.rimni.2023.10.002

Z. Xiao, H. Zhou, J. Wang

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Abstract

The transverse deformation of the tunnel under various loads is unavoidable with the long-term operation of the subway, and the problem of uneven settlement is gradually highlighted. A three-dimensional of tunnel lining model is established in ABAQUS to simulate the uneven settlement and transverse deformation on the safety performance, in which the deformation, internal force, and damage are further analyzed. Based on the simulation, safe settlement values for the shield tunnel with different level of existing transverse deformations (L) are suggested. Because the internal force and damage are not only related to the settlement value (∆) but also to the length of the tunnel where the settlement occurs, the ratio of the settlement value (∆) to the corresponding length (L) of the shield tunnel ∆/L which is called the uneven settlement coefficient is proposed as an index. The uneven settlement coefficient ∆/L is given for different transverse deformations to extend the applicability of the safe settlement values, which provides theoretical support for on-site monitoring and tunnel maintenance to some extent.

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不均匀沉降对既有盾构衬砌的影响分析

随着地铁的长期运行，隧道在各种荷载作用下的横向变形是不可避免的，不均匀沉降问题逐渐凸显。利用ABAQUS软件建立了隧道衬砌三维模型，模拟了隧道衬砌不均匀沉降和横向变形对隧道衬砌安全性能的影响，并对衬砌的变形、内力和损伤进行了分析。在此基础上，提出了盾构隧道在不同横向变形水平下的安全沉降值。由于内力和损伤不仅与沉降值(∆)有关，还与发生沉降的隧道长度有关，因此提出沉降值(∆)与盾构隧道相应长度(L)的比值(∆/L)作为指标，称为不均匀沉降系数。给出了不同横向变形的不均匀沉降系数∆/L，扩展了安全沉降值的适用性，为现场监测和隧道维护提供了一定的理论支持。

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来源期刊

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria 工程技术-工程：综合

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： International Journal of Numerical Methods for Calculation and Design in Engineering (RIMNI) contributes to the spread of theoretical advances and practical applications of numerical methods in engineering and other applied sciences. RIMNI publishes articles written in Spanish, Portuguese and English. The scope of the journal includes mathematical and numerical models of engineering problems, development and application of numerical methods, advances in software, computer design innovations, educational aspects of numerical methods, etc. RIMNI is an essential source of information for scientifics and engineers in numerical methods theory and applications. RIMNI contributes to the interdisciplinar exchange and thus shortens the distance between theoretical developments and practical applications.