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首页> 外文期刊>KSCE journal of civil engineering >Case Study of the Effect of Rainfall Infiltration on a Tunnel Underlying the Roadbed Slope with Weak Inter-Layer
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Case Study of the Effect of Rainfall Infiltration on a Tunnel Underlying the Roadbed Slope with Weak Inter-Layer

机译：降雨渗透对隧道底层弱层面隧道效果的案例研究

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摘要

It is a common type of tunnel under-cross the roadbed slope with weak inter-layer. Rainfall infiltration will cause soil softening, matric suction and strength reduction, which seriously threaten the safety of slope and tunnel. This paper presents a case where a tunnel underlying the roadbed slope with weak inter-layer in Guiyang 1# line, China. The seepage calculation model in MIDAS GTS/NX software, considering hydraulic permeability coefficient characteristic curve and soil-water characteristic curve, was used to analyze the stress and deformation of the roadbed slope and tunnel. The results reveal that rainfall infiltration has great influence on the deformation of roadbed slope with weak inter-layer and the force of internal tunnel. Slope displacement increases rapidly in the early stage and decreases in the late stage, but the absolute value of displacement increases continuously and the slope safety factor decreases gradually, which makes the slope in a dangerous state. The force of tunnel lining increases in the early stage and decreases with the recovery of soil strength after rainfall. The control effects of anchor cable and anti-slide pile reinforcement on slope sliding and tunnel stress were studied. And the anchor cable reinforcement measure is more effective on reducing slope slip and tunnel lining structure internal force.
机译：它是一种常见的隧道隧道，底层斜坡，层间弱。降雨渗透将导致土壤软化，原料吸力和强度减少，这严重威胁着斜坡和隧道的安全性。本文提出了一种隧道在贵阳1＃线上的路线层下面的隧道底层。考虑液压渗透系数特征曲线和土壤 - 水特性曲线的MIDAS GTS / NX软件中的渗漏计算模型用于分析路基斜坡和隧道的应力和变形。结果表明，降雨渗透对路基坡度的变形具有很大影响，具有弱层面和内部隧道力。坡度位移在早期阶段增加迅速增加，并且晚期减少，但位移的绝对值连续增加，坡度安全系数逐渐降低，这使得倾斜呈危险状态。隧道衬里的力量在早期阶段增加，随着降雨后的土壤强度的恢复而降低。研究了锚和抗滑动桩加固对斜坡滑动和隧道应力的控制效应。并且锚固电缆增强措施在减少斜坡滑动和隧道衬砌结构内力方面更有效。

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  • 来源
    《KSCE journal of civil engineering》 |2020年第5期|1607-1619|共13页
  • 作者

    Sheng-yuan Fan; Zhan-ping Song; Yu-wei Zhang; Nai-fei Liu;

  • 作者单位

    School of Civil Engineering Xi'an University of Architecture and Technology Xi'an 710055 China Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering Xi'an 710055 China;

    School of Civil Engineering Xi'an University of Architecture and Technology Xi'an 710055 China Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering Xi'an 710055 China;

    School of Civil Engineering Xi'an University of Architecture and Technology Xi'an 710055 China Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering Xi'an 710055 China;

    School of Civil Engineering Xi'an University of Architecture and Technology Xi'an 710055 China Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering Xi'an 710055 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rainfall infiltration; Unsaturated roadbed slope; Flow-solid coupling; Slope reinforcement; Numerical simulation;

    机译：降雨渗透;不饱和的路基斜坡;流固耦合;坡钢筋;数值模拟;

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