土工基础

›› 2019, Vol. 33 ›› Issue (5): 604-608.

• 工程实录 • 上一篇    下一篇

土体开挖卸荷对地铁隧道的影响数值模拟分析

徐腾飞   

  1. (南昌轨道交通集团有限公司，南昌 330000)
  • 收稿日期:2019-04-15 修回日期:2019-05-05 出版日期:2019-10-20 发布日期:2019-10-22
  • 作者简介:徐腾飞(1986-)，男，工程师，研究方向为市政工程、城市轨道交通工程。

Numerical Simulation of the Effect of Soil Excavation and Unloading on an Existing Subway Tunnel

XU Tengfei   

  1. (Nanchang Rail Transit Group Co., Ltd., Nanchang, Jiangxi 330000)
  • Received:2019-04-15 Revised:2019-05-05 Online:2019-10-20 Published:2019-10-22

摘要： 基坑大面积开挖后浅埋区间结构，同时受隧道两侧新建房屋附加荷载的影响，加剧区间结构上抬的可能，采取区间上方土体加固并考虑时空效应，通过两种计算模型互核，确保计算结果有较好的可靠度，可有效的控制区间结构位移。研究成果对后续类似工程具有一定的参考意义。

关键词: 基坑开挖卸载, 土体加固, 不利荷载, 区间隆起, 数值模拟

Abstract: The existing shallow buried subway tunnel near a large deep excavation site is subjected to both the unloading from the deep excavation and loading effect of the adjacent new building constructions. The subway structures under these lading conditions have the upward movement. This concern is numerically simulated by two different approaches and the soil improvement above the subway structures is proposed. The analytical results indicate that the soil improvement can effectively reduce the potential upward movement of the subway structures.

Key words: Unloading in the Deep Excavation, Ground Improvement, Unfavorable Loading Conditions, Upward Movement, Numerical Simulation