• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2019, Vol. 39 ›› Issue (S2): 213-219.DOI: 10.3973/j.issn.2096-4498.2019.S2.028

• 研究与探索 • 上一篇    下一篇

软土大断面类矩形组合顶管暗挖车站长期沉降预测分析

杨逸枫1, 廖少明1, 吴东鹏2   

  1. (1. 同济大学地下建筑与工程系, 上海200092; 2. 上海轨道交通十四号线发展有限公司, 上海 200030)
  • 收稿日期:2019-09-26 出版日期:2019-12-31 发布日期:2020-04-04
  • 作者简介:杨逸枫(1998—),男,安徽安庆人,同济大学土木工程学院隧道及地下建筑工程专业在读硕士,主要研究方向为隧道等地下工程施工 控制。E-mail: 1553216@ tongji. edu. cn。
  • 基金资助:

    上海市“科技创新行动计划”(17DZ1203804, 19511100802)

Prediction and Analysis of Long-term Settlement of Large Cross-section Quasi-rectangular Combined Pipe Jacking Excavated Station in Soft Soil

YANG Yifeng1, LIAO Shaoming1, WU Dongpeng2   

  1. (1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Shanghai Rail Transit Line 14 Development Co., Ltd., Shanghai 200030, China)
  • Received:2019-09-26 Online:2019-12-31 Published:2020-04-04

摘要:

为确保软土地层中施工的大断面小间距顶管隧道及车站运营期的安全稳定,针对其工后的长期沉降进行预测分析。采用二维数值分析方法,选用软土蠕变本构模型,建立组合顶管结构长期沉降的预测分析模型,分析地表、组合顶管结构、地层内部土体的长期沉降随时间的发展规律。结果表明: 1)地表和组合顶管结构的长期沉降发展趋势均为前期增长较快,随着时间的发展增长速率减慢,但达到稳定所需的时间较长; 2)地表长期沉降分布为中间大两边小,20 年时间内最大沉降值为28. 4 cm; 3)东线站台层顶管和西线站台层顶管的长期沉降比较统一,沉降值为8. 9 cm,西线站厅层顶管相比之下沉降显著,沉降值达到22. 4 cm。

关键词: 软土地层, 组合顶管结构, 软土蠕变模型, 长期沉降

Abstract:

The post-construction long-term settlement of a large cross-section small-spacing pipe jacking tunnel in soft soil is predicted and analyzed to ensure its safety and stability during construction and operation. The two-dimensional numerical analysis method with the soft soil creep constitutive model is used to establish an analysis model for the longterm settlement of the combined pipe jacking structure; and the development of the long-term settlement of the surface, combined pipe jacking structure and soil is analyzed. The analytical results show that: (1) The long-term settlement of surface and combined pipe jacking structures develops fast in the early stage, but slows down with time; and the time for stabilization is quite long. (2) The long-term settlement of the surface is large in the middle and small on sides, and the maximum settlement value is 28. 4 cm in 20 years. (3) The long-term settlement of the east line station and that of the west line station are relatively coincide with each other, the settlement value is 8. 9 cm, and the settlement of west line station hall, in contrast, is significant and the settlement value reaches 22. 4 cm.

Key words: soft soil layer, combined pipe jacking structure, soft soil creep model, long-term settlement

中图分类号: