Purpose

The paper aims to predict longitudinal deformation of a tunnel caused by grouting under the tunnel bottom in advance according to the grouting parameters, which can ensure the safety of the tunnel structure during the grouting process and also help to design the grouting parameters.

Design/methodology/approach

The paper adopted the analytical approach for calculating the longitudinal deformation of a shield tunnel caused by grouting under a tunnel, including usage of the Mindlin’s solution, the minimum potential energy principle and case validation.

Findings

The paper provides a variational method for calculating the longitudinal deformation of a shield tunnel in soft soil caused by grouting under the tunnel, which has high computational efficiency and accuracy.

Originality/value

This paper fulfils an identified need to study how the longitudinal deformation of a shield tunnel in soft soil caused by grouting under the tunnel can be calculated.

中文翻译：

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隧道下注浆软土盾构隧道纵向变形变分计算方法

目的

本文旨在根据注浆参数对隧道底部注浆引起的隧道纵向变形进行预先预测，既可以保证注浆过程中隧道结构的安全，又有助于进行注浆参数的设计。

设计/方法/方法

本文采用解析法计算隧道下注浆引起的盾构隧道纵向变形，包括Mindlin解法的使用、最小势能原理和案例验证。

发现

本文提供了一种计算隧道下注浆引起的软土中盾构隧道纵向变形的变分方法，具有较高的计算效率和精度。

原创性/价值

本文满足了研究如何计算隧道下注浆引起的软土中盾构隧道纵向变形的确定需求。