华东交通大学学报2016，Vol.33Issue(3)：87-93,7.
基于路基加固条件下隧道下穿火车站路基沉降分析
Analysis on Roadbed Settlement of Tunnel-under Crossing Railway Station under the Condition of Roadbed Reinforcement
摘要
Abstract
This study presents the law of roadbed settlement and deformation in railway construction in the case of Fuzhou Metro Line 1 traversing Fuzhou Railway Station. The comparison of on-site monitoring data and nu-merical stimulation data was made in the study to analyze the settlement and deformation law under the condition of the jet grouting pile and the sleeve valve tube grouting reinforcement.The analysis indicates that longitudinal effect of shield on roadbed ranging from 10 m to 20 m in the front of the cutter head and 40 m behind the cutter head;and the horizontal effect range is 20 m from central line on both sides. The plastic valve pipe grouting area of plastic valve pipe grouting is comparatively smaller than jet grouting area whether in the process of shield tunnel construction or after the construction, thus the construction effect of plastic valve pipe grouting is better. For two reinforcements, the railway roadbed tends to be stable after 8 days when the shield cutter head left the cross section, and the stability and the settlement of the roadbed are directly related to the time of settlement de-formation; Numerical stimulation shows that the embankment settlement could be reduced by both of reinforce-ments, and numerical stimulation statistics is in conformity with measured data and the sleeve valve tube grout-ing reinforcement effect is better.关键词
盾构隧道/路基沉降/旋喷桩/袖阀管注浆/数值模拟Key words
shied tunnel/roadbed settlement/jet grouting piles/plastic valve pipe grouting/numerical stimula-tion分类
交通工程引用本文复制引用
郑明新,高其泽,欧阳林,袁钎,刘家桦..基于路基加固条件下隧道下穿火车站路基沉降分析[J].华东交通大学学报,2016,33(3):87-93,7.基金项目
国家自然科学基金项目（51568022）；江西省高等学校科技落地计划项目 （）
