This article is reproduced from: People's Daily Online-Guizhou Channel
10 engineering projects won the 2024 China Electric Power Quality Project, 2 projects won the 2022-2023 National Quality Engineering Gold Award, 1 project won the 2022-2023 National Quality Engineering Award, and 1 project won the 2023 China Installation Association Science and Technology Progress Award. Award first prize, and 6 projects won the 2023 Quality Projects of China Southern Power Grid Corporation… In the past two years, China Southern Power Grid Guizhou Power Transmission and Transformation Co., Ltd. has adhered to “safety first, quality first”, focused on the construction of high-quality projects, and strengthened the overall construction quality Process control has created many high-quality projects, established multiple benchmark projects, and won praise and recognition from many units.
Model guides the way and controls the quality of the construction process
“Implement model guidance for construction of important processes and key parts.” When it comes to how to control the construction quality of engineering projects, Hu Xiwen, deputy general manager of the Project Management Center of Guizhou Power Transmission and Transformation Company, has very rich experience in this.
As an old project manager, Hu Xiwen has been engaged in front-line engineering construction for more than ten years. The Greater Bay Area flexible DC back-to-back project (Yuezhong Converter Station), ±800 kV Xinsong Converter Station and other projects he is responsible for have won national quality awards. Project Gold Award, Yunnan-Guizhou Interconnection Channel Project (Converter Station), Weining 500 kV Substation New Construction Project and other projects won the National Quality Engineering Award.
“Adhering to the model first is an important starting point for us to control the quality of the construction process.” Through the model guide, we provide project construction personnel with intuitive, standard, detailed and unified visual technical explanations and quality requirements, and further unify various processes. Construction methods, common quality fault prevention and control, quality inspection and acceptance standards effectively promote the continuous improvement of comprehensive management levels such as project construction, site management, quality and safety, and civilized construction.
In recent years, Guizhou Power Transmission and Transformation Company has deeply promoted the work of “double improvement of physical quality and service quality”, launched the “Guizhou Power Transmission Ingenuity Base”, and carried out “night school” activities to strengthen front-line project personnel's learning of common engineering quality problems and key points of quality control. , improve their quality awareness and business level; at the same time, supervise the implementation of “model first”, make process and construction method samples first, and then carry out large-scale construction after passing the acceptance inspection. In addition, each project is also required to strictly implement the construction procedures and acceptance steps during the construction process, implement management measures for each key link, and provide technical briefings for construction personnel before work, so as to promote the improvement of project quality.
Special “physical examination” to eliminate hidden quality defects
“The quality control of the tension clamp crimping is good and meets the conditions for operation…” On the eve of the smooth energization and operation of the 500 kV Genbajia line anti-icing reinforcement renovation project, Hu Aji, a technician from Guizhou Power Transmission and Transformation Company, “incarnated” as a doctor. Carry out X-ray flaw detection of tension clamps on line projects to check whether there are defects in the crimped tension clamps to ensure early detection and removal of hidden defects that endanger the safe operation of the line, laying a solid foundation for safe and stable operation after engineering transformation. .
It is reported that X-ray flaw detection uses the extremely penetrating characteristics of X-rays to reflect changes in the thickness of objects and internal defects through real-time imaging, helping technicians determine whether there are hidden dangers in the tension clamp that are invisible to the naked eye. defect.
“If problems are discovered, inform the construction project department as soon as possible, and the project department will organize personnel to re-press the connection.” In recent years, Guizhou Power Transmission and Transformation Company has used new technologies and new methods to strengthen special “physical examinations” of construction quality to prevent “disease-borne” projects “run.
According to Hu Aji, before completing the X-ray flaw detection of the 500-kilovolt power generation Bajia line anti-icing reinforcement renovation project, he and his colleagues also went to Luodian Yalei Mountain and other projects in southern Guizhou to conduct foundation pile inspections.
“Through the 'low strain method' to detect the integrity of the pile body of the foundation pile, we can determine the degree and location of the pile body defects.” Hu Aji said that the low strain method detection is mainly based on the propagation theory of elastic waves, and performs vertical vibration on the top of the pile body. , the elastic wave propagates downward along the pile body. When an excited elastic wave propagates in the pile body, it encounters interfaces with obvious wave impedance differences (such as pile bottom, broken piles, severe segregation, etc.) or pile body interceptions. Reflected waves will occur at areas where the area changes (such as diameter reduction or expansion). After receiving amplification, filtering and data processing, the reflection information from different parts of the pile body can be identified.
Comprehensive “physical examination” and strict quality control
Quality is life, and responsibility is heavier than Mount Tai. In recent years, Guizhou Power Transmission and Transformation Company has optimized and introduced a series of quality control systems and standards, further strengthened the “three-level” quality acceptance system, strictly controlled the quality acceptance of key processes, and conducted comprehensive “physical examinations” of project engineering.
“Compared with before, today's company-level acceptance is more professional and controllable.” Hu Xiwen said that in the past two years, Guizhou Power Transmission and Transformation Company has adopted the form of joint acceptance by subordinate branches and third-party units, effectively ensuring the independence of project acceptance. The quality and professionalism have significantly improved the quality and efficiency of company-level acceptance.
It is understood that after the company adopted the new acceptance situation, it effectively strengthened the construction of the acceptance team, improved the specialization, meticulousness, and process of the acceptance work, enhanced the quality awareness of project department personnel, and improved the quality level of the project.
“After the company-level acceptance personnel submit their reports, the project department must carry out rectification and closed loops one by one based on the reports.” Hu Xiwen said that according to regulations, projects with poor engineering quality control will be notified to the whole company, and the relevant responsible persons will be punished. Evaluate personnel's performance of duties, and urge the project department to eliminate defects in a timely manner to ensure that project quality meets standards.
“Work on a project and build a monument.” As a “time-honored” power transmission and transformation construction company with a history of 66 years, Guizhou Power Transmission and Transformation Company participated in the construction of the world's first ±800 kV UHV DC transmission project from Yunnan to Guangdong. The ±800 kV UHV DC transmission project, the world's highest 220 kV substation construction project in Saga 220 kV substation, the China-Laos Railway power supply project and other projects of great significance at home and abroad. At the same time, by adhering to ingenuity and controlling project quality, we have achieved continuous excellence in project quality and comprehensive improvement in project construction levels, and have won the China Construction Engineering “Luban Award”, the National Quality Engineering Gold Award, the National Quality Engineering Award, China Installation Star, Guizhou Province “Huangguoshu Cup” quality project and other honors. (Chen Yan)