摘要
目前成都地区盾构施工穿越砂卵石地层诱发的滞后地表塌陷问题成为关注焦点,而导致地表滞后塌陷现象的根本原因是地层损失和土拱效应,因此研究导致盾构施工地层损失的原因意义重大。文章结合成都地铁1、2号线砂卵石地层盾构施工实际情况,总结出了在砂卵石地层中盾构施工引起地层损失的主要影响因素(地层特性、施工掘进参数和施工辅助措施);并针对不同地层损失,提出了相应的施工对策。
The lagging ground collapse induced by shield construction in sandy pebble stratum has become a focus of attention; the critical causes of this phenomenon are ground loss and the soil arching effect. This article summarizes the main influential factors （stratum characteristics, parameters of construction, and auxiliary measures） based on the shield construction in sandy pebble stratum of the Chengdu Metro lines 1 and 2. Corresponding countermeasures are put forward regarding different ground losses.
出处
《现代隧道技术》
EI
北大核心
2012年第3期54-61,共8页
Modern Tunnelling Technology
基金
国家自然科学基金资助项目(50879049)
关键词
砂卵石地层
地层损失
影响因素
颗粒离散元
施工对策
Sandy pebble stratum
Ground loss
Influential factor
Particle discrete element
Countermeasures
