Main Participants: ZHU Xinmin, MIAO Hong, CHEN Chunhao, FENG Shaokong, LU Zhengchao, MA Baolong, HUANG Tao, HAN Ruihua, MENG Shiqian, WANG Jinsong, NIE Ding, YANG Lufei, CUI Wei, ZHANG Shilei, LI Lianggeng

Long-distance pressure water pipelines in water diversion projects, characterized by large diameter, extended transport distance, and high pressure, are prone to leakage and pipe burst accidents. Traditional monitoring and inspection methods have blind spots, making it difficult to comprehensively monitor project safety. Moreover, water shutdown for inspection affects operation efficiency and may even induce new structural damage.

With accelerating urbanization and aging pipeline infrastructure, the risks of pipeline leakage and burst are intensifying, resulting in an urgent need for efficient and accurate monitoring and inspection technologies. The development of new continuous monitoring and inspection technologies enables real-time diagnosis of pipeline health status and early warning of potential risks without affecting project operation. This not only provides a strong guarantee for the safe operation of water diversion projects, but also promotes technological advancement in the water conservancy industry, enhances project management standards, and offers vital support for the development of water ecological civilization and the sustainable socioeconomic development, demonstrating significant social benefits and scientific value.

·   Having developed continuous monitoring technologies for large buried pipelines in water diversion projects by utilizing distributed optical fiber vibration continuous monitoring systems, hydroacoustic detectors, and fiber bragg grating hydraulic pressure gauges.

·   Having developed inspection and evaluation technologies for FRP pipes in water diversion projects by employing cross-sectional laser scanning combined with segmented elliptic curve fitting; summarizing deformation patterns of flexible pipelines based on project cases.

·   Having developed the inspection and evaluation technologies for PCCPs in water diversion projects by utilizing remote field eddy current, soil resistivity, and high-density surface wave methods, and proposed a pipeline safety assessment methodology.

·   Having developed the wire breakage diagnosis and pipe burst early warning technologies for PCCPs in water diversion projects based on deep learning, and proposing evaluation methods for early warning and alarm thresholds for wire breakage and pipe bursts.

·   Having obtained a national invention patent titled “Continuous Monitoring Method for Leakage and Early Warning System for Pipe Bursts in Large Buried Pressure Water Pipelines” (Patent No. ZL 2013 1 0544612.2), one of the earliest patents in this field. The core research content has been included in Section 4.3 “Pipeline Monitoring Technology” in chapter 1 of Key Technologies for Design and Safety Protection of Long-distance Water Pipelines (ISBN978-7-5630-6198-3), edited by Li Jiang of Xinjiang.

·   Having obtained multiple national invention patents, including “Method for Deformation Degree Detection and Evaluation of Buried Pipelines” (Patent No. ZL 2017 1 0707788.3), and participated in the drafting of the building material industry standards: Glass Fiber Reinforced Plastic Continuously Wound Sand Pipes (JC/T 2538-2019) and Glass-reinforced Plastic Continuously Wound Hollow Structure Pipes (TCSTM 00592-2021).

·   Having obtained the national invention patent titled “Method for Structural Safety Detection and Method for Structural Safety Evaluation of Buried Pipelines" (Patent No. ZL 2017 1 0707788.3); having participated in the compilation of the national standard - Technical Requirements for Non-destructive Testing of Prestressed Concrete Cylinder Pipes (Remote Field Eddy Current Electromagnetic Method) (GB/T 41055-2021) and the Technical Specification for Rehabilitation of Drainage Pipelines with Grouting Anchor Lining (T/CECS 1007-2022), and led the review of Structural Safety Risk Assessment of Urban Municipal Pipelines (T/CECS 1120-2022).

·   Having obtained multiple national invention patents, including "Online Monitoring System and Real-time Early Warning Method for Prestressed Concrete Cylinder Pipelines" (Patent No. ZL 2021 1 1037619.6), and participated in the drafting of the national standard “Technical Requirements for Distributed Acoustic Optical Fiber Monitoring System on Prestressed Concrete Cylinder Pipe” (GB/T 41057-2021).

The continuous monitoring technologies have been applied in major water resource projects, including the Water Source Project in North Shenzhen City, the Irrigation Zone Reservoir in Baise in Guangxi Province, the Water Diversion Project from Chaor River to Liaohe River in Nei Mongol, and the Water Resources Allocation Project around the Beibu Gulf in Guangxi Province.

The inspection and evaluation technologies have addressed frequent pipe bursts in the Water Source Project in North Shenzhen City and the PCCP Water Conveyance Project in the 38th Regiment Irrigation Area of the Second Division of Xinjiang Production and Construction Corps. Such technologies have also been applied in projects such as the East Main Canal of the Beijing section of the South-to-North Water Diversion Project and Underground Channel of the North Juma River.

The partner team, Beijing Besttone Pipeline Technology Co., Ltd., has built upon the patented technologies developed in this research to upgrade and expand services tailored to the monitoring needs of gas and petrochemical pipelines. These technologies have already been applied in projects such as the Lingqiao section of the Fuyang Gas Pipeline and a petrochemical pipeline at a chemical terminal in Taixing.

Figure 1 Layout Diagram for Field Prototype Test of Leakage Monitoring and Pipe Burst Early Warning System for Pressure Water Pipelines

Figure 2 Research on Pipe Burst Early Warning Methods and System Development

Figure 3 Cross-sectional Laser Scanning + Segmented Elliptic Curve Fitting Method for Inspection

Figure 4 Impact Imaging Method for Inspection

Figure 5 High-density Surface Wave Method for Pipeline Foundation Inspection

Figure 6 Research on Acoustic Signal Extraction Algorithms for Prestressed Wire Breakage

Figure 7 Research on Early Warning and Alarm Threshold Evaluation Methods for Wire Breakage and Pipe Bursts