Justification of cross direction profile of pipe-culvert of closed mine-type spillway

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL Quarterly Journal of Engineering Geology and Hydrogeology Pub Date : 2023-07-27 DOI:10.52321/igh.37.1.35
T. Lyapota
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Abstract

The main purpose of the study is to develop models for the strength reliability of closed spillways at earth-fill dams. The object of the research is closed mine-type spillway structures. The strength reliability model of a closed spillway structure includes a material model, a shape model, a model of actual load, and a fracture model. The material model in most cases is reinforced concrete. The shape model is very important, especially for precast culverts of glory hole spillways, because giving it a certain shape can significantly reduce the value of stresses acting in weak sections. As a result of the stress reduction, there is a decrease in material requirements, primarily for metals, leading to reduced energy and economic costs. This also makes it possible to increase the reliability and durability of such structures, increase their operational safety, and adapt them to various operating conditions. The shape model for the culvert is justified. The load model determines the behavior of the structure during construction and operation. This article suggests a justification for the methodology for calculating the strength of a precast culvert of segment blocks. The methodology allows to perform strength analysis of culverts of closed spillways with a cross-section outline similar to a membrane. The state of reinforced concrete load-carrying units under various combinations of loads has been studied. The limits of stresses and displacements, the excess of which can lead to destruction in the load-carrying units, are determined.
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闭式矿用溢洪道管涵洞横向轮廓的论证
本研究的主要目的是建立土坝封闭溢洪道的强度可靠度模型。研究对象为封闭型矿用溢洪道结构。闭式溢洪道结构强度可靠度模型包括材料模型、形状模型、实际荷载模型和断裂模型。材料模型在大多数情况下是钢筋混凝土。形状模型是非常重要的,特别是对于辉煌洞溢洪道预制涵洞,因为给它一定的形状可以显着降低作用在弱截面的应力值。由于应力降低,材料需求减少,主要是金属,从而降低了能源和经济成本。这也使得提高这种结构的可靠性和耐久性,提高其操作安全性,并使其适应各种操作条件成为可能。对涵洞的形状模型进行了验证。荷载模型决定了结构在施工和运行期间的性能。本文提出了分段砌块预制涵洞强度计算方法的合理性。该方法允许对具有类似于膜的横截面轮廓的封闭溢洪道涵洞进行强度分析。研究了钢筋混凝土承载单元在各种荷载组合作用下的受力状态。确定了应力和位移的极限,超过这些极限会导致承载单元的破坏。
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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