脱空排水管道高聚物修复前后力学特性分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: Analysis of the Mechanical Characteristics of Disengaging Drainage Pipe Before and After Polymer Repairing

作者:: 李斌; 方宏远; 王复明; 1. 郑州大学水利与环境学院;2. 重大基础设施检测修复技术国家地方联合工程实验室;3. 水利与交通基础设施安全防护河南省协同创新中心

Author(s):: Li Bin 1; 2; 3; Fang Hongyuan 1; 2; 3; Wang Fuming1; 2; 3; 1. School of Water Conservancy and Environment, Zhengzhou University ;2. National and Local Joint Engineering Laboratory of Major Infrastructure Inspection and Repair Technology; 3. Henan Provincial Collaborative Innovation Center for Water Conservancy and Transportation Infrastructure Safety Protection

Keywords:: drainage pipes; empty bottom; traffic load; Polymer grouting technology; mechanical properties

摘要:: 高聚物注浆技术是一种经济高效的排水管道渗漏脱空处置方法，但修复后管道力学性能恢复状态尚不明确，基于ABAQUS软件建立了道路结构、路基土体及管道相互作用的三维有限元模型，对比分析了正常管道、脱空管道和高聚物修复管道在交通荷载作用下的纵、环向力学特性。结果表明，交通荷载对其作用位置两侧6m和4m范围内管道的应力和变形影响显著，影响程度与荷载大小呈正相关；各管节处Mises应力高度不连续；交通荷载为1.0MPa时管道受力和变形明显大于交通荷载为0.5MPa时；高聚物修复管节脱空后管道受力和变形均恢复到了正常管道水平，达到了可靠有效的修复效果，研究成果为实施针对性管道修复提供了理论依据。

Abstract:: Polymer grouting technology was a kind of economical and efficient method for leakage of pipeline. However, the application of this technology for the restore statue of the mechancial properties of the pipe afer repairing was not yet clear.In this paper, the three-dimensional numerical model of the road structure,subgrade and pipe-soil interaction were established by the ABAQUS software.The longitudinal and circumferential mechanical properties of normal pipes, disengaging pipe and polymer-repaired pipe under traffic load were compared and analyzed. The results showed traffic load had obvious influence on the pipe stresses and deformations in the range of 6m and 4m on both sides of its position, and the influence was positively correlated with the amplitude of traffic load.The stresses at the bell and spigot joints were highly discontinous.When traffic load was 1.0MPa, the stresses and deformations of the pipe are obviously greater than that of traffic load is 0.5MPa;The stresses and deformations of the pipe recovered to the normal pipe level after the disengaging was repaired by the polymer, and a reliable and effective repairing effect was achieved.The research results provided a theoretical basis for the implementation of targeted pipe repair.