大型800 MPa级钢岔管洞内水压试验研究

发布时间：2018-08-02 09:46

【摘要】：溧阳抽水蓄能电站为国内首个大型800 MPa级钢岔管洞内拼装、焊接以及水压试验项目,工程地质条件复杂,洞内无法布置天锚,面临岔管体型大、高强钢、洞内焊接技术要求高等问题。通过采取优化设计运输台车、洞内拼装吊架、布置钢栈桥、采用单元滑移、整体拼装等工艺,解决了水压试验前的拼装焊接难题。在水压试验中,充分考虑试验充排水方案,并采取多项安全措施预案,确保水压试验一次成功。试验共完成应力测试、残余应力测试、声发射测试、变形检测等4项测试内容,为工程后期安全运行提供了基础数据。工程实践表明:只要过程监控到位、措施得当,洞内拼装焊接质量能够得以保证;大体型、高强钢岔管洞内水压试验是可行的。
[Abstract]:Liyang pumped storage power station is the first large 800 MPa grade steel branch pipe in China to assemble, weld and water pressure test projects. The engineering geological conditions are complex, the tunnel can not be arranged with sky anchors, facing the large bifurcation pipe size, high strength steel, The technical requirements of welding in the hole are high. By means of optimizing the design of the transportation platform, assembling the hanger in the tunnel, arranging the steel trestle, adopting the technology of unit slip and integral assembly, the difficult problem of assembling and welding before the hydraulic pressure test is solved. In the water pressure test, the scheme of water filling and drainage is fully considered, and several safety measures are taken to ensure the success of the water pressure test. Four items including stress test, residual stress test, acoustic emission test and deformation test were completed, which provided the basic data for the safe operation of the project. The engineering practice shows that as long as the process monitoring is in place and the measures are appropriate, the quality of assembling and welding in the tunnel can be guaranteed, and the hydraulic test in the tunnel with large shape and high strength steel bifurcation pipe is feasible.
【作者单位】：中国水利水电第三工程局有限公司;
【基金】：中国电力建设集团公司项目(2012-04)
【分类号】：TV732.43

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