土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (6): 695-698.

• 专题论述 • 上一篇    下一篇

基于上海地层多线叠交盾构施工的Peck公式之改进

张 彬   

  1. （浙江省大成建设集团有限公司，杭州 310012）
  • 收稿日期:2020-01-10 修回日期:2020-01-19 出版日期:2020-12-30 发布日期:2020-12-25
  • 作者简介:张 彬（1989-），男，工程师，研究方向为市政工程。

Improvement of Peck Formula in Multiline Overlapped Shield Tunnel Construction in Shanghai

ZHANG Bin   

  1. (Zhejiang Dacheng Construction Group, Hangzhou 310012)
  • Received:2020-01-10 Revised:2020-01-19 Online:2020-12-30 Published:2020-12-25

摘要： Peck公式是经常使用的一种预测地表沉降公式，但隧道施工时由于不同因素影响均会造成地表沉降，从而导致该公式在预测时存在局限性。以上海地铁十一号线徐家汇站至上海体育馆站施工区间隧道四线叠交施工过程中的监测数据为基础，引入沉降槽宽度修正系数与地表最大沉降修正系数，改进与调整Peck公式达到施工工况要求。相关研究数据显示：当地表最大沉降修正系数介于 0.2~1.2，沉降槽宽度修正系数介于0.4~1.6之间可以获得良好的预测曲线，研究成果可为多线叠交盾构隧道施工区域保护技术的实施提供一定的理论指导。

关键词: 多线叠交隧道, 地表沉降, Peck公式改进, 修正系数

Abstract: The Peck Formula is often used to predict the surface settlement dur to the tunnel excavation. The influence of various factors that might cause the surface settlement during the tunnel excavation and these factors might lead to a large settlement prediction error. In this paper, based on the construction monitoring data during the overlapping construction of the four lines of tunnels between Xujiahui Station and Shanghai Gymnasium Station of Shanghai Metro Line No.11, the width correction coefficient of the settlement trough and the maximum settlement correction coefficient of the surface are introduced, and the Peck Formula was improved and corrected to meet the requirements of the construction conditions. The monitored data indicated that, when the maximum settlement correction coefficient of the surface was between 0.2 and 1.2 and the correction coefficient of slot width is between 0.4 and 1.6, a good settlement prediction curve can be obtained.

Key words: Multi-line Overlapped Tunnel, Ground Settlement, Improved Peck Formula, Corrected Parameters

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