大型泵站输水管线钢岔管应力分析及结构形式  

Analytical study on stress of bifurcated pipes in a pumping station of South-to-North Water Transfer Project

作　　者：郑璀莹[1] 王雷[2] 史文彪[2] 欧阳建[2] 

机构地区：[1]中国水利水电科学研究院结构材料研究所,北京100038 [2]北京市水利规划设计研究院,北京100044

出　　处：《中国水利水电科学研究院学报》2007年第1期39-42,共4页Journal of China Institute of Water Resources and Hydropower Research

摘　　要：针对南水北调工程惠南庄泵站输水管线中的卜型钢岔管进行三维有限元计算分析,在设计水头110m和校核水头130m作用下,考虑有无外包混凝土、计入不计入钢管及混凝土自重、外包混凝土与钢管之间垫层弹性模量的不同取值以及采用设计肋板和加强肋等各种不同工况,对卜型钢岔管应力进行计算分析,以确定岔管在设计水压力和校核水压力作用下的安全性。结果表明,岔管的最大主拉应力一般发生在支管与主管相交处,考虑外包混凝土与钢管的联合作用将显著减小最大拉应力值;同时,增长肋板长度或者增加肋板刚度都有利于降低拉应力峰值。根据计算结果,对惠南庄泵站输水管线的钢岔管设计提出了建议。A 3-D Finite Element analysis is carried out to study stress distribution of branch-type bifurcated pipes under a group of working regimes. The pipes are located in the Huinanzhuang pumping station, which belongs to South-to North Water Transfer Project. The regimes involve different internal water pressure, with and without coated concrete, considering and not considering gravity of the structures, choosing different elastic modulus of bedding material between the pipes and coated concrete, and adopting differcnt structural style of reinforcing rib. The security of the pipes is ensured in all the regimes under the design water head （110m） and the check water head （130m）. The analysis results are mainly the peak values of tensile stress and their variation ender different regimes, which is the dominant factor of the structure. According to the results, some useful suggestions are put forward to improve design of the structures.

关 键 词：卜型岔管 外包混凝土 垫层弹模 加强肋 结构分析 

分 类 号：TV675[水利工程—水利水电工程]