Research and safety guarantee technology of large diameter FRPM pipeline for long distance water diversion and transfer project
Deng Mingjiang
Hu Shaowei
Li Jiang
Sun Benbo
Abstract：The long-distance water diversion project is an essential lifeline project in Xinjiang region of China,and its long-term stable operation is crucial for promoting steady industrial growth and ensuring the water supply security of residents.Xinjiang is located in the center of the continent,has a temperate extreme continental climate and posing even more severe environmental challenges for long-distance water diversion projects.Glass fiber reinforced plastic mortar pipe(FRPM)serves as a crucial underground water engineering structure in long-distance water diversion projects.With its excellent resistance to chemical corrosion,lightweight,high strength,absence of secondary pollution,easy installation,and low comprehensive cost,FRPM has been widely applied in the Xinjiang region.However,traditional FRPM production processes have certain limitations in terms of layering design and production automation,leading to inefficient construction processes.Additionally,the lack of unified technical standards and design specifications indirectly limits its application scope.Furthermore,there is no unified standard for pipeline engineering automatic inspection technology and defect quantitative evaluation,making it difficult to reasonably quantify and accurately assess the overall engineering quality.Therefore,relies on the North Xinjiang Xiaowagou Water Supply Project and focuses on key technologies such as pipe laying design and manufacturing processes,engineering design,quality assessment,automatic inspection,operation monitoring,and safety assurance of long-distance large-diameter FRPM.By combining industry,academia,and research,and with 15 years of continuous efforts,breakthrough innovations have been achieved:① Introduced and innovated a FRPM production process suitable for long-distance,high working pressure applications,with continuous winding as the preferred method.Optimized the design method for large-diameter FRPM pipe laying,achieving full automation control from feeding,winding,curing,cutting to testing.Compared with similar foreign products,the flexibility and axial tensile strength of the pipes have been Improved by 20％to 50％.②Proposed engineering and non-engineering measures for safety protection,established principles for categorizing the hazard levels of different types of defects in long-distance FRPM,and developed a theoretical framework and method for safety assessment of FRPM pipeline projects under complex geological conditions.⑧ Systematically revealed the mechanism of FRPM quality defects;developed a local repair process for FRPM using light-curing sheet materials and a non-excavation repair technology with inner PE lining.Evaluation methods for post-repair effects were proposed,achieving effective control over the safe operation of long-distance FRPM pipeline projects.
Keywords：water transmission and transfer projectsfiber reinforced plastic mortar pipesafety guaranteesafety monitoringfunctional recoveryperformance improvement
Publication Date：2024-03-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：15( 31-45 )