沉管隧道管节沉放过程中缆力与运动响应的测试分析  

Testing and Analysis of Mooring Force and Motion Response during Immersion of Tunnel Elements

作　　者：应宗权[1] 欧伟山 林美鸿[1] 

机构地区：[1]中交四航工程研究院有限公司,广州510230 [2]中交四航局第二工程有限公司,广州510300

出　　处：《现代隧道技术》2017年第3期162-168,共7页Modern Tunnelling Technology

基　　金：国家科技支撑计划项目(2011BAG07B01)

摘　　要：沉管隧道管节系泊沉放过程中,缆绳张力和管节姿态是两个关键的参数,决定着整个安装施工的工程质量甚至安全。为了克服广州洲头咀沉管隧道工程缆绳张力监测中遇到的荷载大、防水深度大、安装困难等难题,文章通过荷载验算、校准和防水处理等技术手段,进行了缆绳张力传感器的设计与制作,结合管节安装施工工艺,完成了缆绳张力和管节姿态的测试与分析,分析了管节这种方形系数较大的浮体结构的水流阻力系数,并将数值分析结果与现场试验结果进行了对比。研究表明:缆力传感器加工安装方便,能够满足工程监控要求;管节横向水流阻力系数取值为2.05;缆力与管节姿态的数值模拟结果与测试数据吻合较好。In the process of mooring and sinking tunnel elements, the mooring force and motion response of the tunnel elements are two key parameters that govern construction quality, and even the safety of the immersed tunnel. After calculations, processing, calibration, and waterproofing treatment, a new type of mooring force sensor was designed and made to solve the difficulties in monitoring construction of the Zhoutouzui immersed tunnel project in Guangzhou. These difficulties included a large load, deep water resistance and installation difficulty. Based on the construction technology of immersed tunnel elements, the tests of the mooring force and attitude of elements were carried out, the current resistance coefficient of the tunnel element （a floating structure with a large block coefficient） was analyzed, and then the field test results and numerical analysis results were compared. The study results show that the sensors can be made and installed conveniently while meeting the requirements of monitoring; the coefficent of lateral flow resistance should be 2.05 for immersed element; and the calculation results agree well with the test data.

关 键 词：沉管隧道 施工监控 缆绳系泊力 水阻力系数 运动响应 

分 类 号：U455.46[建筑科学—桥梁与隧道工程]