基于修正Peck法的隧道施工全地层变形规律研究  

Study on strata settlement regular pattern induced by tunnel construction based on Peck formula

作　　者：宋战平[1,2] 李世豪 张学钢[1,3] 王军保[1] 王涛[2] SONG Zhanping;LI Shihao;ZHANG Xuegang;WANG Junbao;WANG Tao(School of Civil Engineering, Xi＇an Univ. of Arch. ＆ Tech. , Xi＇an 7]0055, China;China Railway Construction Bridge Engineering Bureau Group Co. Ltd, Tianjin 300300, China;Shaanxi Railway Institute, Shaanxi Weina 714000, China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]中国铁建大桥工程局集团有限公司,天津300300 [3]陕西铁路工程职业技术学院,陕西渭南714000

出　　处：《西安建筑科技大学学报（自然科学版）》2018年第2期190-195,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金(51578447);渭南市科研发展计划项目基金(2015KYJ-3-1);住房城乡建设部科学技术基金项目(2017-K4-032)

摘　　要：研究隧道施工引起上覆不同深度处的地层沉降变形对分析城市地铁隧道施工对邻近建(构)物的影响意义重大.考虑隧道施工地层扰动变形由下向上逐渐变形的特点,基于Peck法的沉降槽宽度与随机介质理论中地表影响半径关系,由下向上逐步分析隧道上覆各埋深地层的沉降变形;考虑各地层土性质、厚度和隧道半径对沉降槽宽度造成的影响,求得沉降槽宽度在地层各深度处的表达式;讨论了隧道上覆地层土性参数、成层土厚度和隧道开挖半径对地层沉降变形的影响,分析表明:地层的沉降槽宽度主要取决于该地层与隧道开挖面之间的覆土性质和厚度,与隧道半径也有很大关系;地层土的性质、厚度和隧道半径决定了地层的沉降范围,而地层损失决定了地层沉降量大小.隧道半径越大,沉降槽宽度越大;覆土的内摩擦角越小,沉降槽的宽度越小,地层沉降曲线越窄.The subway tunnel construction inevitably causes the surface settlement.With too lage settlement,under the action of the displacement and deformation of the soil,the adjacent buildings and buried pipelines will produce uneven settlement,so to endanger their normal and safe use.In this case the study of the settlement of strata is of great significance to the evaluation of the influence of urban subway tunnel construction on adjacent structures.In view of the settlement caused by the tunnel excavation on the upper soil of the tunnelling face,the strata settlement step by step with the consideration of the influence of the radius of tunnel and the nature and thickness of the cover soil on the width of the settlement trough,the expression of the width of the settlement trough in each buried depth and the settlement law of the formation are obtained.It is concluded that the width of the settlement trough is mainly determined by the radius of the tunnel and the nature and thickness of the cover soil.And the settlement of the strata,the depth and radius of the tunnel,the nature of the cover soil are also related with the ground loss.In the construction of tunnel excavation in a certain area,the range of disturbed soil is certain and the key to the control the settlement lies with the rate of ground loss.

关 键 词：隧道工程 全地层沉降 Peck法 沉降槽 内摩擦角 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]