摘要
以徐州城市轨道交通某浅埋暗挖隧道下穿高速公路工程为例,为降低矿山法施工对高速路基路面沉降的影响,采用FLAC3D数值模拟软件对入段线、出段线隧道施工全过程进行了模拟.结果表明:入段线、出段线隧道开挖引起的高速沉降最大值为7.48 mm,位于入段线路中,隧道开挖沿高速纵向形成沉降槽,沉降槽范围为隧道中心线两侧各约25 m范围内,高速路受影响较大的区域为线路中线两侧各15 m范围,上覆路基没有产生超限沉降.针对数值计算结果制定了控制下穿段沉降专项措施,施工监测表明开挖方案降低了对高速路基路面的影响.
Taking underground excavation of shallow tunnel in Xuzhou urban rail transit as an example,in order to reduce the influence of mining method construction on the settlement of highspeed subgrade and pavement,the whole process of tunnel construction in and out section line is simulated by FLAC3Dnumerical simulation software.The results show that the maximum value of the high-speed settlement caused by the tunnel excavation of the entrance and exit section lines is 7.48mm,which is located in the entrance section line.The tunnel excavation forms a settlement groove along the high-speed longitudinal direction.The range of the settlement groove is about 25mon both sides of the central line of the tunnel.The affected area of the high-speed road is 15mon both sides of the middle line of the line,and the overlying subgrade has no over limit settlement.According to the numerical calculation results,the special measures to control the settlement of the underpass are formulated.The construction monitoring shows that the excavation scheme reduces the impact on the high-speed subgrade and pavement.
作者
张亮亮
杨继辉
董永
马田飞
ZHANG Liangliang;YANG Jihui;DONG Yong;MA Tianfei(China construction municipal engineering corporation limited,Beijing 10071,China;State Key Laboratory for Geomechanics and Deep Under ground Engineering,China Universityof Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《江苏建筑职业技术学院学报》
2020年第1期12-17,共6页
Journal Of Jiangsu Vocational Institute of Architectural Technology
基金
江苏省住建厅项目:基于临空面的超强度岩石破岩机理与成套设备研究(2019ZD079)
江苏建筑职业技术学院院级课题:多年冻土区浅埋隧道围岩变形演化机理研究(JYJBZX16-3)
关键词
隧道施工
下穿高速路基
沉降
数值模拟
tunnel construction
underpass high-speed subgrade
settlement
numerical simulation
作者简介
张亮亮,男,天津人,高级工程师,研究方向为城市轨道交通建设施工.E-mail:zhangll@qq.com
