Upper bound stability analysis of single-layered slurry trenches in clay using the perturbation method

IF 5.3 1区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Geotechnics Pub Date : 2024-10-30 DOI:10.1016/j.compgeo.2024.106864

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Abstract

This study systematically analyzed the stability of slurry trenches in clayey soils. The analysis focused on non-homogeneous clays with a linear increase in undrained shear strength. The perturbation procedures based on three-dimensional rigid translational moving elements are established and employed in the analysis. The findings of this study provide lower upper-bound solutions than the existing solutions and demonstrate the potential of the perturbation method in delivering precise upper-bound solutions. The study offers a comprehensive understanding of the factors affecting trench stability, including the dimensions of the trench (width, length, and depth), the properties of the slurry (unit weight and filling level), and the properties of the clay (unit weight, the undrained shear strength at the ground, and undrained strength gradient). The analysis is investigated by considering the dimensionless quantities associated with previous factors. Finally, a novel design equation is presented through nonlinear regression analysis of computed upper-bound solutions.

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采用扰动法对粘土中的单层泥浆沟进行上限稳定性分析

本研究系统分析了粘性土中泥浆沟的稳定性。分析的重点是非均质粘土，其排水剪切强度呈线性增长。在分析中建立并采用了基于三维刚性平移移动元素的扰动程序。研究结果提供了比现有解决方案更低的上限值解决方案，并证明了扰动法在提供精确上限值解决方案方面的潜力。该研究全面了解了影响沟槽稳定性的因素，包括沟槽的尺寸（宽度、长度和深度）、泥浆的特性（单位重量和填充水平）以及粘土的特性（单位重量、地面排水剪切强度和排水强度梯度）。通过考虑与前述因素相关的无量纲量，对分析进行了研究。最后，通过对计算出的上限解进行非线性回归分析，提出了一个新的设计方程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computers and Geotechnics 地学-地球科学综合

CiteScore

9.10

自引率

15.10%

发文量

438

审稿时长

45 days

期刊介绍： The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.