China News Service, Panzhihua, July 10 (Reporter Zhang Lang) After 4 consecutive days of operation, at 4 pm on the 10th, a 106.6-meter-high cable crane main tower of Sichuan Guanyinyan Hydropower Station landed safely in a pre-empted area, marking The world’s largest 30-ton radial cable crane dismantling project, under the scientific organization and implementation of China Nengge Gezhouba Electromechanical Co., Ltd., took three years to complete the disassembly of the main structural parts in stages.
On July 8, the main cable of the world's largest 30-ton radiating cable crane landed safely on the dam. Zhang Langshe
The Guanyinyan Hydropower Station is located at the junction of Huaping County, Yunnan Province and Panzhihua City, Sichuan Province, with Ludila Hydropower Station upstream and 27 kilometers downstream from Panzhihua City. For the dam construction, two 30-ton radial cable cranes are arranged. The height of the cable crane tower is 106.6 meters, the span is 1365 meters, and the single main cable weighs about 103 tons. The arrangement is fixed on the right bank and mobile on the left bank.
"This cable crane equipment has two important characteristics. One is that the span design reaches 1400 meters and the load is 30 tons, which is rare in the world. The other is that the fixed tower is up to 106.6 meters, which is also the highest cable crane in China." Wuhan University professor Xia Dayong told reporters that this world-class large-scale cable crane equipment has played an important role in the construction of the dam. After 5 years of operation, it has completed its historical mission. The cable mechanism parts and electrical parts have been idle for a long time. There are doubts about the safety status. If it is not removed as soon as possible, it will cause major safety hazards to the operation of the dam and power station. At the same time, its demolition difficulty is also world-class.
According to Li Yi, the project manager of China Nengge Gezhouba Group Electromechanical Construction Co., Ltd., as early as 2014, this set of cable machine equipment has completed its mission. In 2015, the cable machine demolition project began, from on-site inspection, program preparation and review, and expert demonstration It took almost 5 years to dismantle this cable machine only for safety. The construction environment of Guanyinyan cable crane dismantling is complex, mainly reflected in the release of the tower dumping main cable. The horizontal distance of the main cable release from the power outlet is only 10 meters. During the dumping of the tower, there are upstream biased forces, ropes and guides. Anchor forces are complex and diverse, and are greatly affected by local weather conditions, road conditions, and dam equipment operation and maintenance.
On the afternoon of July 10, the main tower of the world's largest 30-ton radiating cable crane successfully landed on the preset open space. Photo courtesy of Gezhouba
Wang Man, the chief engineer of the cable crane demolition construction project, said, "In order to ensure the implementation of the most critical main project implementation plan for the main tower self-descent, auxiliary drop and main cable recovery position adjustment in this cable crane demolition project, we have passed more than three years Preparation, after 8 expert reviews, continuous improvement of the construction plan, on-site simulation drills of important construction procedures, etc., large-scale hoisting equipment (500-ton crawler crane, 2 350-ton hydraulic tensioning devices and 18 hoists for demolition construction were arranged on site Work to ensure the smooth completion of the demolition project." (End)