Dynamic response of a multi-layered saturated ground with a tunnel subjected to braking moving loads

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Transportation Geotechnics Pub Date : 2025-05-01 DOI:10.1016/j.trgeo.2025.101587

Hao Lei , Zhi Lyu , Jian-Gu Qian

{"title":"Dynamic response of a multi-layered saturated ground with a tunnel subjected to braking moving loads","authors":"Hao Lei , Zhi Lyu , Jian-Gu Qian","doi":"10.1016/j.trgeo.2025.101587","DOIUrl":null,"url":null,"abstract":"<div><div>An analytical solution to the dynamic responses of a multi-layered saturated ground with a tunnel subjected to instantaneous braking loads is developed using the interconversion between the plane and cylindrical waves and transmission reflection matrix. The effects of braking loads (horizontal-vertical moving loads), speed and frequency of loads, and soil stiffness and permeability on dynamic responses of the tunnel-ground system are investigated. The results indicate that the horizontal displacements of the tunnel lining and the dynamic shear stresses of the saturated ground are significantly underestimated when braking loads are neglected. The dynamic responses of the tunnel lining and the surrounding saturated ground also depend on the magnitude of load speed and frequency. The stiffness and permeability of the saturated ground have a considerable effect on the dynamic responses of the tunnel-ground system. The dynamic stresses and pore pressure increase as the soil stiffness grows while as the permeability of the saturated ground decreases, and this effect of soil stiffness and permeability on the dynamic responses gradually diminishes with growing speed.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101587"},"PeriodicalIF":4.9000,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transportation Geotechnics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214391225001060","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

An analytical solution to the dynamic responses of a multi-layered saturated ground with a tunnel subjected to instantaneous braking loads is developed using the interconversion between the plane and cylindrical waves and transmission reflection matrix. The effects of braking loads (horizontal-vertical moving loads), speed and frequency of loads, and soil stiffness and permeability on dynamic responses of the tunnel-ground system are investigated. The results indicate that the horizontal displacements of the tunnel lining and the dynamic shear stresses of the saturated ground are significantly underestimated when braking loads are neglected. The dynamic responses of the tunnel lining and the surrounding saturated ground also depend on the magnitude of load speed and frequency. The stiffness and permeability of the saturated ground have a considerable effect on the dynamic responses of the tunnel-ground system. The dynamic stresses and pore pressure increase as the soil stiffness grows while as the permeability of the saturated ground decreases, and this effect of soil stiffness and permeability on the dynamic responses gradually diminishes with growing speed.

查看原文本刊更多论文

多层饱和地基隧道在制动移动荷载作用下的动力响应

利用平面波与柱面波的相互转换和透射反射矩阵，建立了隧道多层饱和地基在瞬时制动荷载作用下的动力响应解析解。研究了制动荷载（水平-垂直移动荷载）、荷载速度和频率以及土体刚度和渗透性对隧道-地面系统动力响应的影响。结果表明，在不考虑制动荷载的情况下，隧道衬砌的水平位移和饱和地基的动剪应力被显著低估。隧道衬砌及周围饱和地基的动力响应也与荷载的大小、速度和频率有关。饱和地基的刚度和渗透性对隧道-地基系统的动力响应有重要影响。动应力和孔隙压力随土体刚度的增大而增大，随饱和地基渗透率的减小而减小，且土体刚度和渗透率对动力响应的影响随土体刚度和渗透率的增大而逐渐减小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Transportation Geotechnics Social Sciences-Transportation

CiteScore

8.10

自引率

11.30%

发文量

194

审稿时长

51 days

期刊介绍： Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.