混凝土泵送管道压力试验与分析  

Experiment and analysis of pumping pressure of concrete pipeline

作　　者：杜婷 王本武[2] 孙同盼 李智莹 张路敏 吴贤国 DU Ting;WANG Benwu;SUN Tongpan;LI Zhiying;ZHANG Lumin;WU Xianguo(School of Civil and Engineering Management,Guangzhou Maritime University,Guangzhou 510725,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Logistics Department,Tongji Hospital,TongjiMedical College of Huazhong University of Science and Technology,Wuhan 430030,China)

机构地区：[1]广州航海学院土木与工程管理学院,广东广州510725 [2]华中科技大学土木与水利工程学院,湖北武汉430074 [3]华中科技大学同济医学院附属同济医院后勤处,湖北武汉430030

出　　处：《混凝土》2023年第12期187-191,共5页Concrete

基　　金：国家自然科学基金面上项目(52078232);国家重点研发计划项目(2017YFC0805500)。

摘　　要：采用试验获取了混凝土泵送过程中泵送管道控制截面的应变数据,通过计算得到了混凝土泵送时管道的环向应力和轴向应力及管道内壁压力,分析了管道应变、应力和泵送压力损失的变化规律。研究结果表明:混凝土泵送管道的环向和轴向应力随泵压的增大而增大,且随着管道的延伸,泵送压力会发生损失。混凝土正常泵送时管道以环向应力为主,同一截面处环向应变约为轴向应变的2~4倍;弯管处存在应力集中现象,弯管段压力损失较直管大,1 m弯管段引起的压力损失值约为5.5 m直管段引起的压力损失值。研究成果为实时掌握混凝土的泵送状态提供了参考。The strain data of the control section of the pumping pipe during the concrete pumping process was obtained,and the circumferential stress,axial stress and inner wall pressure of the pipe during concrete pumping were obtained by calculation.The variation law of stress,strain and pressure loss of the concrete pumping pipeline was analyzed.The results show that the circumferential stress and axial stress of the concrete pumping pipeline increase with an increase of the pumping pressure,and the pressure loss of the pumping pipeline increases with an extension of the pipeline.During the concrete pumping process,the section of the pipeline is mainly subjected to the circumferential stress,and the circumferential strain is about from2 times 4 times of the axial strain.In addition,an evident stress concentration occurs at the elbow,and the pressure loss of the elbow is larger than that of the straight pipeline.Furthermore,the pressure loss caused by 1 m elbow is about that of 5.5 m straight pipe.The research results provide references to master the pumping state of concrete in real time.

关 键 词：混凝土泵送 泵送管道 应变监测 泵送压力 压力损失 

分 类 号：TU528.01[建筑科学—建筑技术科学]