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某隧洞边顶拱衬砌混凝土施工 被引量:1
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作者 苗鹏 《中国高新技术企业》 2011年第24期41-42,共2页
溧阳蓄能电站⑧施工支洞由于地质条件很差,为了保证施工期安全,隧洞衬砌和开挖同时进行施工。采用了钢模台车进行边顶拱衬砌,有效地解决了开挖与衬砌的干扰问题,同时也保证了施工进度和质量,类似工程可以参考借鉴。
关键词 ⑧施工支洞边顶拱衬砌钢模台车
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水工隧洞弧形顶拱衬砌施工技术要点
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作者 于文化 俞宏强 张承山 《黑龙江水专学报》 2000年第2期73-74,共2页
结合水工隧洞施工 。
关键词 隧洞 弧形顶拱衬砌 施工技术要点
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双沟导流洞顶拱衬砌拉模施工技术 被引量:2
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作者 莫淑梅 赵云贵 《吉林水利》 2007年第11期50-51,53,共3页
水电工程的平洞开挖顶拱衬砌施工普遍采用的是钢模台车衬砌或现支模板衬砌。但由于不同工程部位的具体情况不同,上述衬砌方法在应用过程中又存不适应性。需要根据实际情况对施工工艺进行改进。双沟水电站导流洞衬砌施工中采用的顶拱拉... 水电工程的平洞开挖顶拱衬砌施工普遍采用的是钢模台车衬砌或现支模板衬砌。但由于不同工程部位的具体情况不同,上述衬砌方法在应用过程中又存不适应性。需要根据实际情况对施工工艺进行改进。双沟水电站导流洞衬砌施工中采用的顶拱拉模技术,综合了钢模台车和现支模板的优点,满足了施工需要,降低了施工成本。值得在水电工程施工中推广使用。 展开更多
关键词 导流洞 顶拱衬砌 拉模技术
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提高纳子峡引水发电洞顶拱衬砌混凝土密实度的措施
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作者 杨刚 王可 《陕西水利》 2014年第5期99-100,共2页
本文主要描述了高水头下,提高水工隧洞洞衬混凝土密实度的几种有效措施,对于如何组织实施水工隧洞混凝土衬砌提出了基本的方案,作为类似工程施工借鉴。
关键词 顶拱衬砌 密实度 施工方案
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Effect of insufficient tunnel crown thickness on the post-tensioned concrete lining of the Yellow River Crossing Tunnel and its strengthening schemes 被引量:2
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作者 Qin Gan Cao Shengrong +1 位作者 Lai Xu Yang Fan 《Journal of Southeast University(English Edition)》 EI CAS 2018年第3期356-363,共8页
The effect of deficiency in tunnel crown thickness on the Yellow River Crossing Tunnel with post-tensioned concrete inner lining was investigated by the elasto-plastic finite element method. Changes in the deformation... The effect of deficiency in tunnel crown thickness on the Yellow River Crossing Tunnel with post-tensioned concrete inner lining was investigated by the elasto-plastic finite element method. Changes in the deformations and circumferential stresses of the post-tensioned concrete inner lining with the gradual decrease of the tunnel crown thickness were compared, and the potential bearing risk of insufficient tunnel crown thickness for the Yellow River Crossing Tunnel was revealed. Based on the finite element calculation results of circumferential stresses under different defective cases, the corresponding reinforcement schemes were proposed. The calculation results show that the inner lining can still maintain a satisfactory stress state when the tunnel crown thickness is equal to or greater than 0. 28 m. When the tunnel crown thickness decreases below 0.28 m, the external surface of the crown and internal surface of the crown's adjacent areas may be under tension. The tension stresses will incrementally increase and ultimately exceed the tensile strength of the inner lining concrete as the tunnel crown thickness further decreases gradually. Then, the Yellow River Crossing Tunnel cannot operate normally, and severe cracking, leaking or even failure may occur. When the tunnel crown thickness is equal to or greater than 0.28 m, the reinforcement suggestions are that the void spaces between the inner lining and the outer lining should be back-filled with concrete. When the tunnel crown thickness is less than 0. 28 m, the inner lining should be reinforced by steel plates after concrete back-filling. 展开更多
关键词 post-tensioned concrete linings runnel crownthickness stress redistribution finite element analysis tunnelreinforcement Yellow River Crossing Tunnel
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