Original title: Full of scientific and technological elements, take the elevator to the tower... There are many new things in this construction site!
Workers' Daily-China Industry Network reporter Zhang Chong, correspondent Guo Hui, Rao Hongjie, Zou Xiaomin
On September 3, the Wuhan-Nanchang double-loop 1000 kV line project (Hubei 5 standard) in Huangjiekou Town, Huangshi City, SSN2095 the construction site of the crossing tower was a hot scene. More than 100 personnel of Hubei Power Transmission and Transformation Company stood at different working surfaces such as high altitude and ground in the heat of the scorching sun, relying on scientific and technological means and refined management and control modes to help the project construction advance steadily.
Technology leads fine regulation
"In the hoisting of the tower, it is necessary to prevent mechanical injuries and do a good job of safety protection when working at height." After dawn at five o'clock in the morning, Liu Dengcheng, the head of the company's project work, came to the construction site of the crossing tower to arrange the work. On the same day, they will complete the lifting of the tower in section 19. Subsequently, Liu Dengcheng randomly inspected the work tasks and safety risk identification of 39 construction workers on the site.
The project is the world's first mixed-voltage four-loop UHV transmission line across the Yangtze River, and it is also a key node of the Wuhan Nanchang double-loop 1000 kV UHV project. The total height of the south bank span tower of the project is 325 meters, 1 meter higher than the Eiffel Tower, with a total weight of 3711.14 tons, and the tower covers half a football field. The tower is in the hot summer season, the maximum temperature on site can reach 39 °C, and the current height of the tower has reached 229.5 meters.
How to ensure on-site safety due to high temperature tests and height-increasing risks? Zhang Kai, manager of the construction project department, introduced that under the guidance of the State Grid Hubei Electric Power Company, the project department established a digital control system for the Wunan Great Leap Project, and through digital equipment and means, the safety gate of on-site operations was well controlled; At the beginning of each day, workers are familiar with the construction risk points of the day through a question and answer form, and the project department strengthens the operation risk control from the aspects of construction site and background supervision, and the construction site zoning management is assigned to people; The digital control system integrates 12 modules such as project overview, progress management, and alarm information to carry out all-round digital control of the project.
The Wunan Great Leap Project is the first time in Hubei to use T2T800 type holding rod assembly, with a maximum lifting weight of 20 tons. The construction site set up a centralized control room for holding rods, and in the control room, two large screens and eight small screens were placed in front of the integrated operation platform to build a large span monitoring system, through which the operator monitored the operation of each structure of the holding rod in real time and accurately observed the lifting status of the holding rod.
"AB hook slowly falling" "A hook, B hook slow hook", at 7:08, in the control room, operator Du Jiaheng stared at the lifting speed and lifting weight in the display screen with both eyes, and communicated with the ground personnel through the walkie-talkie. As the camera accurately locates the 19 sections of the main material on the ground, the main material of the cross-river tower begins to be hoisted. After the operator hooks, lifts and the camera automatically tracks, the tower is steadily lifted and raised.
Take the elevator to the tower
In the construction site, a yellow and white cuboid car is installed on the A leg side of the tower, "this is the artifact used to climb the tower - elevator" project safety officer Ye Tiantian introduced, the elevator is set up a total of 9 floors of parking platform, up to 284.5 meters of altitude can transport workers to a height of 284.5 meters, in the same height tower group tower construction, operators such as climbing from the ground to more than 200 meters in the air takes more than 40 minutes, using the elevator to climb the tower only takes 10 minutes, not only shortening the time to climb the tower, saving the physical strength of operators and reducing safety risks.
On the same day, Tang Jiaming, Na Yongfa, Shi Juanxian and other workers responsible for the assembly of the main material of the 19th section A leg fastened their seat belts, carried work tools and slowly walked into the elevator, and lifted off to carry out operations.
"After a while, everyone will feel tired in the tower, you can go to the elevator compartment to rest." Tang Jiaming looked at several workers beside him and said. While talking, the elevator arrived at the parking platform, and they quickly checked their respective safety protective equipment, tied the extension rope, hung up the fall arrester, and moved towards the operation point.
"AB hook stop, turn back to the left" At 8:12 a.m., high-altitude conductor Tang Jiaming shouted towards the walkie-talkie. "AB trolley inward" "AB trolley stop", when the holding rod returned to the tower leg position, Tang Jiaming then commanded. At this point, the tower hoisting is about to enter the position stage. "Turn your arm a little more to the left... Stop, stop! "A hooks down a little... Stop! A series of instructions were issued from Tang Jiaming's walkie-talkie, and after the close cooperation of the tower personnel and the operator holding the pole, at 8:31, the A-leg main material was successfully in place.
In view of the ultra-high pole tower assembly, aerial workers face certain labor intensity and psychological pressure and other problems, the company's project department has built a "personnel status" module based on smart bracelets, smart safety helmets and other Internet of Things devices. Through wearable intelligent equipment, the construction personnel's physical status, operation location and other information are monitored at all times, so as to realize the panoramic perception of the operation site and automatic alarm of illegal behavior, ensuring online supervision of safe construction and effective and timely risk disposal.
After the project is put into operation, it will further improve the stability of the power grid in central China, strengthen the power exchange capacity between provinces in central China, and better meet the needs of economic and social development.
Source: Daily Worker's client