娄虹玉, 张军. 输电线路铁塔原位纠偏变形主材关键技术的研究[J]. 电力学报, 2023, 38(1): 46-53. DOI: 10.13357/j.dlxb.2023.005
引用本文: 娄虹玉, 张军. 输电线路铁塔原位纠偏变形主材关键技术的研究[J]. 电力学报, 2023, 38(1): 46-53. DOI: 10.13357/j.dlxb.2023.005
LOU Hong-yu, ZHANG Jun. Research on Key Technology of Deformation Main Material for In-Situ Deviation Correction of Transmission Line Tower[J]. Journal of Electric Power, 2023, 38(1): 46-53. DOI: 10.13357/j.dlxb.2023.005
Citation: LOU Hong-yu, ZHANG Jun. Research on Key Technology of Deformation Main Material for In-Situ Deviation Correction of Transmission Line Tower[J]. Journal of Electric Power, 2023, 38(1): 46-53. DOI: 10.13357/j.dlxb.2023.005

输电线路铁塔原位纠偏变形主材关键技术的研究

Research on Key Technology of Deformation Main Material for In-Situ Deviation Correction of Transmission Line Tower

  • 摘要: 输电铁塔在加工、运输、组立安装、运行维护等过程中,由于极端气象环境、杆件变形、施工质量等因素影响,存在铁塔结构构件承载力不足的问题,严重威胁输电安全。结合某江南站π接入同心站220 kV迁改线路工程N001#铁塔原位纠偏工程实例,开展了铁塔原位纠偏变形主材的关键技术研究。现场实测数据测量显示,该输电铁塔基础根开、基础顶面高差均已超出《110 kV~750 kV架空输电线路施工及验收规范》(GB 50233—2014)的规定限值。充分考虑铁塔实际使用条件和现场施工条件,并对变形铁塔进行精确受力计算与结构分析,判断铁塔施工时存在强行组装情况,铁塔未加载情况下变形主材附加内力值达到其极限内力值的24.2%。为保证线路长期安全运行,结合当地气象条件,考虑到铁塔长期负荷,对铁塔局部构件变形量进行不同工况下的受力分析,设置变形铁塔适用的边界条件,提出了以抱箍顶升和夹具连接十字型加固技术为重点的恢复铁塔根开并加固变形主材的原位纠偏方案,总结出输电线路铁塔原位纠偏关键技术要点。该原位纠偏工程已于2019年实施完成,截至目前纠偏铁塔已安全稳定运行超过三年。该原位纠偏加固方案对输电线路铁塔同类型问题的解决提供了工程经验和技术支持。

     

    Abstract: In the process of processing, transportation, installation, operation and maintenance of transmission tower, due to the influence of extreme meteorological environment, bar deformation, construction quality and other factors, there is a problem of insufficient bearing capacity of tower structural members, which seriously threatens the safety of transmission. Based on the in-situ rectification project of N001# tower in a 220 kV relocation line project of a Jiangnan station π access concentric station, the key technology research on the main material of in-situ rectification deformation of the tower is carried out. The field measured data measurement shows that the root opening of the transmission tower foundation and the height difference of the top surface of the foundation have exceeded the specified limits of Code for Construction and Acceptance of 110 kV~750 kV Overhead Transmission Lines(GB 50233—2014). Fully considering the actual use conditions and on-site construction conditions of the tower, and carrying out accurate stress calculation and structural analysis of the deformed tower, it is judged that there is forced assembly during the construction of the tower, and the additional internal force value of the deformed main material reaches 24. 2%. In order to ensure the long-term safe operation of the line, combined with the local meteorological conditions, considering the long-term load of the tower, the stress analysis of the deformation of the local components of the tower under different working conditions is carried out, and the applicable boundary conditions of the deformed tower are set. An in-situ correction scheme for restoring the tower root opening and strengthening the deformed main material is proposed, which focuses on the hoop lifting and fixture connection cross reinforcement technology. The key technical points of in-situ correction of transmission line tower are summarized. The in-situ rectification project has been completed in 2019, and the rectification tower has been operating safely and stably for more than 3 years. This in-situ rectification and reinforcement scheme provides engineering experience and technical support for solving the same type of problems of transmission line towers.

     

/

返回文章
返回