华东交通大学学报2016，Vol.33Issue(3)：1-6,6.
基于透明土的隧道上浮过程结构与土相互作用模型试验
Model Test on Upward Moving Tunnel and Soil Interaction Using Transparent Soil
摘要
Abstract
The stiffness selection for foundation spring of overburden soil, as one of the intractable problems in longitudinal upward movement analysis of shield tunnel, depends on tunnel and soil interaction, which is com-plex and in lack of deep research at present. To probe into upward moving tunnel and soil interaction, based on a small-scale model indoor test system simulating shield tunnel upward movement, this study got anti-buoyancy during upward moving and non-contact observation of internal displacement field with PIV technology. On the basis of a model test for a detailed description of the system’s functions, it finally analyzed the relationship be-tween anti-buoyancy and upward displacement and soil displacement field features around tunnel. Results show that the anti-buoyancy increases with the increase of upward displacement of the model tunnel, but the increas-ing rate decreases. And the anti-buoyancy reaches peak value when the model tunnel upwardly moves to 0.1 times of the outer diameter of the model tunnel. The results also show that the displacement field around the model tunnel presents an approximately swirling pattern.关键词
盾构隧道/上浮/透明土/可视化模型试验/隧道与土相互作用Key words
shield tunnel/upward movement/transparent soil/visual model test/tunnel and soil interaction分类
交通工程引用本文复制引用
周俊宏,宫全美,周顺华..基于透明土的隧道上浮过程结构与土相互作用模型试验[J].华东交通大学学报,2016,33(3):1-6,6.基金项目
国家自然科学基金项目 （）
