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6 m和4 m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. 0 MPa时管道受力和变形明显大于交通荷载为0. 5 MPa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.
Polymer grouting technology was a kind of economical and efficient method for leakage pipeline.However,the application of this technology for the restore statue of the mechanical properties of the pipe after 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 pipe,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 6 m and 4 m 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 discontinuous.When traffic load was 1.0 MPa,the stresses and deformations of the pipe are obviously greater than that of traffic load is 0.5 MPa;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.
引文
[1]WEI Y,WANG F M,GAO X,et al.Microstructure and fatigue performance of polyurethane grout materials under compression[J].Journal of materials in civil engineering,2017,29(9):04017101.
[2]李嘉,王博,张景伟,等.高聚物注浆材料动力特性试验研究[J].建筑材料学报,2017,20(2):198-203.
[3]SHI M S,WANG F M,LUO J.Compressive strength of polymer grouting material at different temperatures[J].Journal of wuhan university of technology-Mater Sci Ed,2010,25(6):962-965.
[4]RAKITIN B,XU M.Centrifuge testing to simulate buried reinforced concrete pipe joints subjected to traffic loading[J].Canadian geotechnical journal,2015,52(11):1762-1774.
[5]XU M,SHEN D,RAKITIN B.The longitudinal response of buried large-diameter reinforced concrete pipewith gasketed bell-and-spigot joints subjected to traffic loading[J].Tunnelling and underground space technology,2017,64:117-132.
[6]MEESAWASD N,BOONYASIRIWAT C,KONGNU-AN S,et al.Finite element modeling for stress analysis of a buried pipeunder soil and traffic loads[C]//Industrial engineering and engineering management(IEEM).Bali:IEEE,2016:385-390.
[7]ALZABEEBEE S,CHAPMAN D,JEFFERSON I,et al.The response of buried pipes to UK standard traffic loading[J].Proceedings of the institution of civil engineersgeotechnical engineering,2016,170(1):38-50.
[8]吴小刚,吴军,宋洁人.交通载荷下管道的位移响应分析初探[J].仪器仪表学报,2006,27(6):14-15.
[9]王直民.交通荷载作用下埋地管道的力学性状研究[D]:杭州:浙江大学建筑工程学院,2006:1-154.
[10]徐建国,胡会明,李松涛,等.地下管道脱空渗漏高聚物注浆抬升修复与数值分析[J].水利与建筑工程学报,2015,13(3):35-40.
[11]徐建国,胡会明,钟燕辉,等.地下管道沉降与脱空高聚物注浆修复数值分析[J].地下空间与工程学报,2017,13(5):1165-1172.
