土工基础

土工基础 ›› 2024, Vol. 38 ›› Issue (5): 816-820.

• 专题论述 • 上一篇    下一篇

盾构隧道施工对地表沉降的影响

张 振1，董亚博1，罗明福1，刘艳涛1，王斌彬2   

  1. （1.中国水利水电第七工程局有限公司，成都 610213；2.东华大学 环境科学与工程学院，上海 201620）
  • 收稿日期:2022-12-05 修回日期:2022-12-15 出版日期:2024-10-31 发布日期:2024-10-23
  • 作者简介:张振（1982-），男，高级工程师，研究方向为城市轨道交通工程。

Impact of Shielded Tunnel Excavation on the Ground Subsidence

ZHANG Zhen1, DONG Yabo1, LUO Mingfu1, LIU Yantao1, WANG Binbin2   

  1. (1.Power China Sinohydro Bureau 7 Co. Ltd., Chengdu 610213;
    2.College of Environmental Science and Engineering, Donghua University, Shanghai 201620)
  • Received:2022-12-05 Revised:2022-12-15 Online:2024-10-31 Published:2024-10-23

摘要： 在盾构隧道施工过程引起的地表沉降研究中，Peck公式是应用较为广泛的模型，但是Peck公式存在一定的局限性，在工程应用中会出现误差。以雄安地铁1号线盾构隧道施工监测数据为基础，结合Peck公式，利用线性回归方程，引入沉降槽宽度系数K和地层损失率η两个修正系数，对Peck公式进行修正，使得修正后的Peck公式更适用于雄安地区的地质条件。通过对雄安地铁1号线地表沉降数据的分析，得到以下结论：隧道施工所引起的地面沉降与地层条件有着密切的联系，而断面地表沉降数据都可进行高斯分布拟合。在雄安地区地质条件下，结合实测数据，对Peck公式进行修正，得到沉降槽宽度系数分布在0.81~0.92之间，地层损失率在3.3%~6.2%之间。

关键词: 盾构隧道, 地表沉降, 修正Peck公式

Abstract: The shield tunnel construction will cause a certain disturbance to the surrounding environment. The surrounding soil and rock mass deformation and ground subsidence exceeding certain limits will threaten the main structure of the tunnel and even affect the safety of the surrounding environment. Therefore, the ground subsidence is one of the necessary items to be measured in the shielded tunnel excavation, and the prediction of the ground subsidence is also the focus of the project. In the study of the ground subsidence caused during the shielded tunnel excavation, the Peck’s formula is a more widely used model. However, the Peck’s formula has some limitations and errors can occur in engineering applications. Therefore, based on the construction monitoring data of the shielded tunnel of Xiong’an Metro Line No. 1, the Peck formula is combined with the linear regression equation. The two correction coefficients, the settlement trough width coefficient K and the stratigraphic loss rate η, are introduced to the Peck formula. The Peck equation is modified so that it is more applicable to the geological conditions of the Xiongan area.

Key words: Shield Tunnel, Ground Subsidence, Modified Peck’s Formula

中图分类号: