铁道科学与工程学报2017，Vol.14Issue(1)：100-109,10.
成都砂卵石地层双线隧道P eck公式参数取值研究
Parameters selection research of Peck formula for twin tunnels in sandy-pebble stratum
摘要
Abstract
Based on the monitoring data of earth subsidence caused by metro excavation with combining stratum character of sand-pebble in Chengdu, we do displacement reverse analysis to the measured data of typical trans-verse section by using Peck formula under normal working condition of Earth pressure balance shield ( EPB shield) tunneling, to get width coefficient ( i) and earth loss ratio. By deeply analyzing the physical mechanics character relationship among width coefficient ( i) , earth loss ratio, tunnel depth and section, we can get the for-mula about the Peck parameter with stratum character and range of the Peck parameter. Firstly, by using super-position technique, we establish prediction formula of surface subsidence which suits for parallel twin tunnels ex-cavation in sand-pebble stratum under normal working condition. Then, we compare the prediction formula with measured surface subsidence data of shield excavation of other routes in Chengdu, which can verify applicability of the prediction formula. The research results can provide reference and data for large-scale metro construction under the similar stratum in Chengdu and other districts in the future.关键词
成都地铁/砂卵石地层/双线平行隧道/Peck公式/土体沉降Key words
Chengdu metro/sand- pebble stratum/double parallel tunnel/Peck formula/soil settlement分类
建筑与水利引用本文复制引用
冯亮,巫锡勇,牟迪,李涛,郭俊,廖昕..成都砂卵石地层双线隧道P eck公式参数取值研究[J].铁道科学与工程学报,2017,14(1):100-109,10.基金项目
国家自然科学基金资助项目(41472256) （41472256）
