108
D01:10.7672/sgjs2013230108
施工技术
CONSTRUCTION TECHNOLOGY
隧道下穿建筑物结构变形监测与分析
肖凯成，曹利2
（1.常州工程职业技术学院建筑工程技术系，江苏
东常州213164；鄂尔多斯
2.神华包神铁路集团新准铁路有限责任公司，内蒙古
016105)
2013年12月上第42卷第23期
【摘要】巴准铁路散包沟隧道出口段在黄土地层中浅埋连续下穿散家沟西梁煤矿3栋建筑物，洞顶覆土厚10， 20m，隧道洞身为砂质黄土与软弱砂岩夹泥岩构成的复合地层。为了保障建筑物安全，掌握敖包沟隧道浅埋下穿段施工引起的建筑物基础变形，评价其影响，根据《建筑地基基础设计规范》GB50007一2011,结合隧道与建筑物之间的位置关系，给出其允许变形限值；根据监测结果，分析了隧道施工过程中建筑物基础沉降随时间变化以及沿横
向、纵向沉降的规律，证明其变形控制在限制范围内，保证了隧道施工过程中建筑物的安全。【关键词】隧道工程；铁路隧道；建筑物；变形；监测
[【中图分类号】U455.4
【文献标识码］A
[文章编号】1002-8498(2013)23-0108-03
Structural DeformationMonitoring and Analysis
ofBuildingswithTunnelDown-traversing
Xiao Kaicheng',Cao Li?
(1. Department of Architectural Engineering Technology,Changzhou Institute of Engineering Technology,
Changzhou,Jiangsu213164, Ching; 2.Xinzhun Railway Co.,Lad. of Shenhua Baoshen
Railway Group Co.,Lad.,Erdos,Inner Mongolia016105,China)
Abstract;Exit section of Aobaogou Tunnel for Battuba-Jungar Railway is located in loess strata , which continuously passes through three buildings of Xiliang Coal Mine in Aojiagou. The thickness of covering soil is 10 ~ 20m. The geology of the tunnel body is complex strata of sandy loess and soft sandstone alternated mudstone. In order to ensure the buildings safety, master foundation deformation of the buildings caused by construction of Aobaogou Tunnel, evaluate the impact of construction, allowable deformation value is given aceording to Code for Design of Building Foundation GB50007—2011, combined with the position relation between the tunnel and buildings. The changing law of foundation settlement with time, transverse part and longitudinal part are analyzed based on monitoring results. The results show that deformation values are within the limits. The measures ensure the safety of the buildings in the construction process of tunnel.
Key words:tunnels; railway tunnels;buildings; deformation; monitoring
巴准铁路敖包沟隧道全长3180m，为双线铁路隧道，地处高原低中山区，地形起伏较大，沟梁相间。隧址区地层软弱，大范围分布砂质黄土、泥岩、砾岩、砂岩夹泥岩。隧道在D1K34+592一D1K34+ 658段连续穿越散家沟西梁煤矿职工宿舍、职工食堂及变电站，洞顶覆土厚10~20m，隧道洞身为砂质黄土与软弱砂岩夹泥岩构成的复合地层，属黄土地层浅理连续下穿多个建筑物工程间题，控制对建筑
【作者简介】肖凯成，副教投，硕士，E-mail：Kcxiao@email.czie.net
【收稿日期】2013-10-08 万方数据
物影响的难度较大。
敖包沟隧道浅埋下穿西梁煤矿办公区建筑物，
建筑物结构强度较差，地表建筑物与隧道空间位置关系不一，引起的建筑物地基各部分的沉降不同，不均匀沉降使得上部结构中产生附加应力（次应力)和变形。一且不均匀沉降超过一定限度，将导致建筑物开裂、倾斜，影响正常使用甚至倒塌破坏。为了保障建筑物安全，掌撑敖包沟隧道浅埋下穿段施工引起的建筑物基础变形，评价其影响，本文根据规范规定并结合建筑物实际情况，给出其允许变形限值,并在施工中进行变形监测，判断建筑物结