摘要
利用Plaxis软件建立有限元模型,分析富水砂层地下水位升降速率对区间盾构隧道衬砌内力的影响。结合南昌地下水位升降规律拟定若干工况,通过将模拟结果与监测数据进行对比分析,验证了模型的正确性,并对各工况下隧道衬砌结构内力进行对比分析。研究结果表明:地下水位上升则衬砌弯矩减小,地下水位下降则衬砌弯矩增大;地下水位升降速率不同对衬砌结构的弯矩影响不同,当水位升降速率大于0.33 m/d时,速率越大对衬砌弯矩影响越大,且下降过程对衬砌弯矩影响大于上升过程。
Plaxis software is adopted to establish a finite element model to analyze the influence of water level rise and fall rate on the internal force of interval shield tunnel lining.Considering the groundwater level rise and fall law in Nanchang,several working conditions are drawn.By comparing the simulation results with the monitoring data,the correctness of the model is verified,and the internal force of tunnel lining structure under each working condition is compared and analyzed.The results show that:when the water level rises,the lining bending moment decreases;when the water level falls,the lining bending moment increases;various groundwater level rise and fall rates have distinguishing influence on lining structure bending moment.When the water level rise and fall rate is greater than 0.33 m/d,the greater the rate is,the greater influence on the lining bending moment is,and the effect of the falling process is greater than that of the rising process on the lining bending moment.
作者
曹鹏飞
袁宗义
陈昭阳
邱友根
陈祥胜
石钰锋
CAO Pengfei;YUAN Zongyi;CHEN Zhaoyang;QIU Yougen;CHEN Xiangsheng;SHI Yufeng(Nanchang Urban Rail Group Co.,Ltd.,330038,Nanchang,China;不详)
出处
《城市轨道交通研究》
北大核心
2022年第1期134-140,共7页
Urban Mass Transit
基金
国家地区科学基金项目(51768020)
国家自然科学基金面上项目(42177162)
江西省重点基金项目(20202ACB202005)。
关键词
富水砂层
地下水位变化
盾构隧道衬砌
受力分析
water-rich sand layer
groundwater level change
shield tunnel lining
force analysis
