Features of formation of the stress-strain state of symmetric and asymmetric river valleys ОСОБЕННОСТИ ФОРМИРОВАНИЯ НАПРЯЖЕННО-ДЕФОРМИРОВАННОГО СОСТОЯНИЯ СИММЕТРИЧНОЙ И АСИММЕТРИЧНОЙ РЕЧНОЙ ДОЛИНЫ

• Main Author: Man’ko Artur Vladimirovich
• Format: Article
• Language: English
• Published: Moscow State University of Civil Engineering (MGSU) 2013-06-01
• Series: Vestnik MGSU
• Subjects: river; valley; dam; stress-strain state; река; долина; плотина; напряженно-деформиро- ванное состояние
• Online Access: http://vestnikmgsu.ru/files/archive/RUS/issuepage/2013/6/24.pdf
• ISSN: 1997-0935; 2304-6600

River valleys take freakish shapes. In mountainous areas, river beds take the forms of canyons, gorges and valleys. In turn, a valley may be symmetric or asymmetric. D.G. Panov is the developer of the valley classification. The valley is a linearly extended relief pattern similar to Latin letter “V” in shape. Let’s consider the two valleys from the viewpoint of geomechanics. In research, it is necessary to define the optimal position of an arch dam with account for its stress-strain state that may develop in the course of its construction and further operation. As an example, we took a hypothetical mountain river having a high-pressure hydroelectric power plant (HPP) with a concrete arch dam.The first series of calculations was aimed at the study of the process of development of the stress-strain state of the massif based on the symmetrical valley slope inclination angle. The second series of calculations was aimed at the study of development of the stress-strained state of the massif depending on slope inclination angle of an asymmetric valley. The following angle values were randomly chosen: 10°, 15°, 20°, 25°,30°. Additional analysis of a slope having the inclination angles of 35°, 37° and40° was performed. At 35°, the slope was steady with a big safety factor, at 37°, the slope was steady, too, but the safety factor was below 10 %, and at 40°, the slope collapsed. The Mora Pendent model was employed for modeling purposes.<br>Рассмотрена методика выбора речной долины для оптимальной геомеханической работы высоконапорных арочных плотин. Определены закономерности формирования НДС массива вокруг плотины до и после ее строительства.