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基于修正UBCSAND模型的隧道地层液化判别分析

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针对依托工程项目地质勘察报告揭示的可能发生液化地层,为分析地层是否会发生液化,以及评估地震作用下地层液化的特征,采用非线性时程分析方法,建立基于修正UBCSAND本构模型的有限元计算模型.分析基本地震和罕遇地震两种工况下,隧道所处地层的孔隙压力比时程曲线及孔隙压力比峰值、地层竖向位移时程曲线及对应峰值,根据液化判据,可确定隧道典型断面所处地层不会发生液化.最后给出隧道工程可能发生地震液化的相应工程预备措施,为类似工程建设提供参考.
DISCRIMINANT ANALYSIS OF TUNNEL FORMATION LIQUEFACTION BASED ON MODIFIED UBCSAND MODEL
In order to analyze whether liquefaction may occur in the geological survey report of the engineering proj-ect,and to evaluate the characteristics of liquefaction under seismic action,a nonlinear time history analysis method is adopted to establish a finite element calculation model based on the modified UBCSAND constitutive model.We analyze the pore pressure ratio time history curve and peak value of pore pressure ratio,vertical displacement time history curve,and corresponding peak value of the stratum where the tunnel is located under two working conditions including basic earthquake and rare earthquake.Based on liquefaction criteria,it can be determined that the stratum where the typical section of the tunnel is located will not undergo liquefaction.Finally,corresponding engineering preparatory measures for possible seismic liquefaction in tunnel engineering are proposed,providing the reference for similar engineering construction.

tunnel engineeringconstitutive modelearthquake liquefactiondiscriminant methods

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中交第二公路勘察设计研究院有限公司,武汉 430056

隧道工程 本构模型 地震液化 判别方法

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(1)
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