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中文摘要：
依据黄河宁夏下河沿至青铜峡库尾段动床模型相似率完成模型设计,全面考虑悬移质及推移质泥沙运动进行了动床模型试验,对河床冲淤变形、丁坝局部冲刷深度、沿程水位、控导工程导溜情况及河型变化情况等进行模拟。通过该河段河道整治规划治导工程修建前后的方案试验,研究不同流量条件下的河势变化规律和规划治导线方案可能出现的问题。提出应采取＂工程导送为主,塞支、疏浚为辅＂的整治方针,对治导线和工程布局进行调整。
英文摘要：
According to the Yellow River mobile bed model similar rates of complete model design, comprehensive consideration of the sus- pended matter and sediment movement simulation, to determine the geometric size of the model, is more important than the ruler and model material, and using the prototype data to model the concentration scale, bedload Gaza scale and time scale to carry out verification test, on the whole river bed scouring and sedimentation deformation, aspects of local scour around spur dike along the depth, water level, sediment grading and river type were compared. Through this section of river regulation planning control lines before and after the construction scheme of engineering test, different boundary conditions treatment scheme of river regime change rule and regulation line planning problems that might arise. On this basis, according to river regulation policy, carrying on the regulation line and engineering layout, engineering guide feeding mainly, plug branch and dredging auxiliary regulation policy is correct.
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Finite element analysis of stress intensity facors for surface temperature cracks in a concrete slab
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