大直径HDPE埋地排水管内力和变形分析
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摘要
以某造船基地为工程背景,利用数值计算和理论分析两种手段,对大直径HDPE埋地排水管道内力和变形进行分析,并对覆土深度及回填材料强度等影响管道内力和变形的参数进行敏感性分析。研究表明:在满足规范要求的情况下,管道是安全的;在一定覆土深度范围内,由于覆土重量及平板车荷载的相互抵消作用,覆土深度对管道内力和变形影响较小;当回填材料质量达不到规范要求时,随着回填材料强度的减小,管道内力及变形均明显增加,危害管道安全。
Taking a shipbuilding base as an engineering background, the internal forces and deformations of large diameter HDPE buried drainage pipes were analyzed by means of numerical calculation and theoretical analysis. Sensitivity parameters such as depth of soil cover and backfill strength, which influence the pipe internal force and deformation, were also analyzed. The results show that the pipeline is safe under the condition of meeting the requirements of the code, and the soil depth has little influence on the internal force and deformation of the pipeline due to the offsetting effect between the weight of soil cover and the load of the flatbed truck. When the quality of the backfill material reaches less than the code requirements, with the reduction of backfill strength, pipe internal forces and deformation are significantly increased, endangering the safety of the pipeline.
Taking a shipbuilding base as an engineering background, the internal forces and deformations of large diameter HDPE buried drainage pipes were analyzed by means of numerical calculation and theoretical analysis. Sensitivity parameters such as depth of soil cover and backfill strength, which influence the pipe internal force and deformation, were also analyzed. The results show that the pipeline is safe under the condition of meeting the requirements of the code, and the soil depth has little influence on the internal force and deformation of the pipeline due to the offsetting effect between the weight of soil cover and the load of the flatbed truck. When the quality of the backfill material reaches less than the code requirements, with the reduction of backfill strength, pipe internal forces and deformation are significantly increased, endangering the safety of the pipeline.
引文
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[10]埋地聚乙烯排水管管道工程技术规程:CECS 164:2004[S].北京:中国建筑工业出版社,2014.
[2]FAHIMIFAR A,TEHRANI F M,HEDAYAT A,et al.Analytical solution for the excavation of circular tunnels in a viscoelastic Burger’s material under hydrostatic stress field[J].Tunnelling and Underground Space Technology,2010,25(2):297-304.
[3]吴华君,魏纲.近距离双线平行盾构施工引起的土体沉降计算[J].现代隧道技术,2014,51(2):63-69.
[4]宁茂权.深厚软土明挖隧道基底标高变异及其控制措施研究[J].2014,52(3):31-38.
[5]石继.回填土对管道稳定性影响的分析[J].给水排水,2007,33(11):197-199.
[6]王霆、蔡勇,等.淤泥土中管道沉降分析及预留沉降量法的应用[J].中国给水排水,2009,25(24):95-98.
[7]孙德志、张庆贺.考虑土与结构共同作用的挡土结构内力和变形[J].河南大学学报(自然科学版),2003,33(3):75-78.
[8]王宝泉、杨敏,等.考虑管土共同作用的矩形地埋管道横截面内力计算[J].工业建筑,2004,34(7):33-35.
[9]郑冰,郭晓冬,等.埋地塑钢复合缠绕管管土共同作用数值分析[J].岩土力学,2009,30(S2):547-549.
[10]埋地聚乙烯排水管管道工程技术规程:CECS 164:2004[S].北京:中国建筑工业出版社,2014.