临河地铁隧道下穿干渠施工响应分析与控制措施
张基强1李嘉诚1吕显州2孙捷城3王丹3王渭明1
Construction Response Analysis and Control Measures of River-Adjacent Metro Tunnel Under-passing Main Channel
ZHANG JiqiangLI JiachengLYU XianzhouSUN JiechengWANG DanWANG Weiming
-
作者信息:1.1.山东科技大学土木工程与建筑学院，266590，青岛；
2.2.山东科技大学地球科学与工程学院，266590，青岛；
3.3.济南轨道交通集团有限公司，250101，济南
-
Affiliation:College of Civil Engineering and Architecture, Shandong University of Science and Technology, 266590, Qingdao, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2023.01.030
-
中图分类号/CLCN:U455.49；TU433
-
栏目/Col:研究报告
摘要:
针对矿山法施工的临河隧道受季节性水位变化影响的问题，以济南轨道交通R3线暗挖隧道下穿大辛河东支沟段为例，采用FLAC3D有限差分软件建立三维数值模型，分析水位变化条件下临河暗挖隧道下穿干渠的施工响应与互馈效应。研究表明：采用洞内超前管棚+全断面注浆+渠道两侧注浆加固时，衬砌最大压应力相对另外两种方案减少了约55.7%和41.3%，衬砌最大拉应力相对另外两种方案减少了约55.9%和33.7%；地层和渠道的受力变形均优于另外两种方案，在变形控制标准值允许范围内。工程实践证明，临河暗挖隧道丰水期下穿渠道施工采用洞内超前管棚+全断面注浆+渠道两侧注浆组合加固方案可以有效控制地层变形，确保隧道的施工安全。
Abstracts:
In view of the influence of seasonal water level change on the tunnel constructed by mining method adjacent to river, based on the section works where the underground tunnel of Ji’nan Rail Transit Line R3 under-passes the east branch ditch of Daxin River, a three-dimensional numerical model is established by using finite difference software FLAC3D to analyze the construction response and mutual feed effect of the underground-excavated tunnel under-passing main channel with the change of water level. Research shows that when adopting advance pipe-roof+full section grouting+channel both-side grouting reinforcement, the maximum compressive stress of the lining is reduced by 55.7% and 41.3% respectively compared with the other two schemes, and the maximum tensile stress of the lining is reduced by 55.9% and 33.7% respectively. Moreover, the stress and deformation of stratum and channel are superior to those of the other two schemes, which are within the allowable range of deformation control standard value. Engineering practice has proven that for construction of river-adjacent underground-excavated tunnel under-passing channel in high-flow season, adopting combined reinforcement scheme of advance pipe-roof+full section grouting+channel both-side grouting can effectively control stratum deformation and ensure tunnel construction safety.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 地铁隧道过海段复合衬砌参数的敏感性分析
过刊浏览
资料下载
友情链接