武九管廊顶进施工引起地表变形的 数值计算与现场实测  

Numerical Calculation and Field Measurement of Surface Deformation Caused byJacking Construction of Wujiu Integrated Pipe Gallery

作　　者：高增奎 沈磊磊[2] 王先甲 王丹生[2] GAO Zengkui;SHEN Leilei;WANG Xianjia;WANG Dansheng(Wuhan Engineering Co Ltd of CRSG,Wuhan 430212,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]中铁七局集团武汉工程有限公司,湖北武汉430212 [2]华中科技大学土木与水利工程学院,湖北武汉430074

出　　处：《土木工程与管理学报》2021年第4期120-126,共7页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51878314)。

摘　　要：顶管法施工避免了管廊施工对地面结构的直接影响,但管廊顶进施工对地表土体变形的影响却不能忽视。本文采用MIDAS/GTS软件对武九管廊和平大道段顶进施工引起的地表土体变形进行了有限元数值计算。研究结果表明:靠近始发井的土体直接产生沉降变形,且随着顶进距离的增加逐渐增大到最大值;远离始发井的土体则先发生抛物线形的隆起变形,在达到某一顶进距离时,土体变形由隆起转变为沉降,且随着顶进距离的增加沉降逐渐增大到最大值;地表土体在垂直于管廊轴线方向的变形呈现“U”型沉降变化曲线,在管廊轴线正上方沉降值最大。开展了武九管廊和平大道段顶管施工引起地表土体变形的现场监测,监测结果验证了地表土体变形有限元计算结果的正确性。The pipe jacking method can avoid the direct influence of the jacking construction on the above ground structures,but the influence of the pipe gallery jacking on the surface soil deformation cannot be ignored.In this paper,MIDAS/GTS finite element software is used to carry out numerical calculation of the surface soil deformation caused by the jacking construction of Wujiu pipe gallery.Numerical results show that the soil near the starting shaft directly produces settlement deformation,and it gradually increases to the maximum value with the increase of jacking distance.However,the soil far away from the starting shaft first presents parabolic uplift deformation.When reaching a certain jacking distance,the soil deformation changes from uplift to settlement,and then the settlement gradually increases to the maximum with the increase of the jacking distance.The surface soil deformation in the direction perpendicular to the axis of the pipe gallery presents an U-shaped settlement curve,and the settlement value is the largest just above the axis of the pipe gallery.Deformation monitoring of surface soil caused by pipe jacking is also carried out in the Heping avenue section of Wujiu pipe gallery.The field measurement results verify the accurateness of surface deformation calculated by finite element method.

关 键 词：综合管廊 顶管施工 地表土体变形 数值模拟 现场实测 

分 类 号：TU990.3[建筑科学—市政工程]