摘要
为研究双线盾构隧道下穿对输水暗涵的影响,以合理选择加固方案,基于工程实际相关参数建模,采用FLAC3D对未加固、仅隧道围岩加固、仅暗涵区间地层加固、隧道围岩和暗涵区间地层联合加固4种方案进行了数值模拟研究,对数值模拟结果进行了对比分析.结果表明:上述4种方案施工引起的暗涵最大沉降值分别为26.3 mm、14.5 mm、12.7 mm和6.8 mm,未加固方案暗涵管段存在明显的应力集中,前两种方案变形缝部位出现塑性区,后两种方案暗涵变形缝部位无塑性区.联合加固方案对减少暗涵结构及地表沉降效果显著.
For studying the influence of the twin shield tunnel under-crossing on the buried culverts and offering the suitable reinforcement method, based on the real project construction parameters, the FLAC3D was adopted to nu-merically simulate the effects of unreinforced, only stratum surrounding culverts reinforced, only stratum around tunnels reinforced, and both strata around culverts and tunnels reinforced on buried culvert, and the results of numerical simu-lation were compared and analyzed. It was induced by above-mentioned methods respectively that the largest vertical deformation of buried culvert is 26.3 mm,14.5 mm,12.7 mm and 6.8 mm, there was obvious stress concentration exi-ting on the culvert sections for the unreinforced method, there were the plastic zones appearing on the culvert deforma-tion joints for the former two methods, and there were not plastic zones appearing on the culvert deformation joints for the latter two reinforced methods. The last improvement method was very effective for reducing the deformation of cul-vert structures and surface subsidence.
出处
《信阳师范学院学报（自然科学版）》
CAS
北大核心
2016年第3期480-484,共5页
Journal of Xinyang Normal University(Natural Science Edition)
基金
福建省自然科学基金项目(2016J01743)
福建省科技计划重点项目(2012Y0062)
福建省高等学校学科带头人培养计划资助(FETU)
关键词
双线盾构隧道
输水暗涵
影响
数值分析
twin shield tunnels
buried culvert
influence
numerical analysis
