引滦入津隧洞工程上覆堆载影响安全评价研究  

Study on safety assessment of impact from overburden mound-load upon Water Diversion Tunnel from Luanhe River to Tianjin

作　　者：骆学军[1] 付国群 邓昌[2,3] 汤雷[2,3] 顾培英[2,3] 

机构地区：[1]天津市引滦工程隧洞管理处,河北迁西064300 [2]南京水利科学研究院,江苏南京210029 [3]水利部水科学与水工程重点实验室,江苏南京210029

出　　处：《水利水电技术》2013年第9期44-48,共5页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金资助项目(51179107;51079087)

摘　　要：引滦入津隧洞已运行30年。近年来,洞线6+500～9+000段上部堆载了大量的矿渣、铁精粉等,洞内也出现了衬砌裂缝、变形等明显病害。堆载有多大,是否影响隧洞安全,一直是未解的安全隐患。本文通过现场堆载测量与原始地形资料计算得出上覆荷载,并采用有限元法对隧洞堆载进行仿真计算。结果表明,随着堆载的进一步增加,衬砌应力将超过混凝土设计强度,从而影响隧洞的整体安全性。The Water Diversion Tunnel from Luanhe River to Tianjin has operated for 30 years. In recent year, the overburden mound-load of a large amount of mining waste, iron powder, etc. is piled up along the section of 6 ＋ 500 -9 ＋ 000 of the tunnel route, while some obvious engineering diseases such as lining cracks, deformations, etc. occur inside of the tunnel therein as well. How large the amount of the overburden mound-load is and whether the safety of the tunnel is impacted by it or not are all along the potential safety risks those are not eliminated. The overburden load is obtained herein through the measuring the in situ mound-load and calculating the original topographic data, and then the mound-load upon the tunnel is simulatively calculated with the finite element method. The result shows that the strength of the lining of the tunnel is to be surpass the design strength of the concrete, if the mound-load is further increased, thus the integral safety of the tunnel is to be impacted.

关 键 词：引滦入津隧洞 上覆堆载 围岩等级 衬砌混凝土 应力 安全评价 

分 类 号：TV672.1[水利工程—水利水电工程]