通过试验和仿真对大直径混凝土排水管顶进施工质量进行了评价

IF 2.9 4区 工程技术 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Computers and Concrete Pub Date : 2021-09-01 DOI:10.12989/CAC.2021.28.3.321
Yanmin Yang, Zhixin Zhang, Yongqing Li, Zesen Ge, Y. Xiong, Xiangkun Meng
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引用次数: 0

摘要

大直径钢筋混凝土排水管应用于某地下排水管顶进工程。排水管内径3.5 m,外径4.2 m。自重26000公斤,顶升距离640米。采用无损检测技术和三缘承载试验对工程中随机选取的两根大直径混凝土排水管进行了质量评价。通过静力试验,得到了排水管的荷载-位移曲线和荷载-应变曲线,分析了排水管的整体和局部变形规律。利用ABAQUS软件建立有限元模型,并将试验结果与仿真结果进行对比。对比结果表明,各测点位移随载荷的增大而增大,两根排水管均表现出良好的综合性能,且两根排水管均表现出良好的综合性能。在排水管顶部测得最大位移和应变,在排水管侧壁和底部观察到裂缝。模拟结果的荷载-位移曲线与试验结果的荷载-位移曲线吻合良好。这意味着有限元模型的计算结果具有较好的精度,可以作为相应研究的依据。两根排水管在三缘承载试验下的开裂荷载值(裂缝宽度达到0.20 mm时的荷载值)分别为325 kN/m和324 kN/m。两种排水管均符合国家标准,大直径钢筋混凝土排水管可用于实际工程。
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Based on experiment and simulation to evaluate the qualityof large diameter concrete drain-pipe by jacking method
The large diameter reinforced concrete drain-pipe were applied in a underground drain-pipe jacking engineering. The inside and outside diameter of the drain-pipe are 3.5 m and 4.2 m respectively. The weight is 26000 kg, and jacking distance is 640 m. The nondestructive testing technology and three-edge bearing test were used to evaluate quality of the two large diameter concrete drain-pipe which selected randomly in engineering. The load-displacement curves and load-strain curves of drain-pipe were obtained, the global and local deformation laws of drain-pipe were analyzed through static test. The finite element model was established by ABAQUS, and the test results and simulation results were compared. The results of comparison show that the displacement of each measuring point increases with increasing load, and both of the two drain-pipe show well overall performance, and the well overall performance was shown in both of the two drain-pipe. The maximum displacement and strain were measured at the top of the drain-pipe, and the cracks are observed at the sidewall and bottom of drain-pipe. The load-displacement curves from simulation results is in well agree with the load-displacement curves from test results. It means that there is a good accuracy of the calculation results with the finite element model, which could be used as the basis for the corresponding research. Cracking load values under three-edge bearing test (the load value when the width of crack reaches 0.20 mm) of the two drain-pipe are 325 kN/m and 324 kN/m, respectively. And both drain-pipe meet the Chinese national standard, which the large diameter reinforced concrete drain-pipe could be used in actual engineering.
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来源期刊
Computers and Concrete
Computers and Concrete 工程技术-材料科学:表征与测试
CiteScore
8.60
自引率
7.30%
发文量
0
审稿时长
13.5 months
期刊介绍: Computers and Concrete is An International Journal that focuses on the computer applications in be considered suitable for publication in the journal. The journal covers the topics related to computational mechanics of concrete and modeling of concrete structures including plasticity fracture mechanics creep thermo-mechanics dynamic effects reliability and safety concepts automated design procedures stochastic mechanics performance under extreme conditions.
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