A hybrid dam model test device and its application method

Abstract

The invention discloses a mixed dam model test device and a use method. The mixed dam model test device comprises a model box, a concrete dam section and rockfill materials. A plurality of dynamic pressure sensors are arranged at different elevations of the back face of the concrete dam section. Displacement sensors are arranged at the top and the bottom of the concrete dam section. A water bag is arranged on the front face of the concrete dam section. An upper horizontal cover plate and a lower horizontal cover plate are arranged at the top of the model box. A guide groove is formed in the upper horizontal cover plate. A vertical cover plate is mounted in the guide groove. A water inlet valve and a pressure valve which are connected with the water bag are arranged on the lower horizontal cover plate. A drainage valve is arranged at the lower end of the water bag. A combined stopper connected with the model box is arranged on the slope faces of the rockfill materials. A lower baffle is arranged on the combined stopper and hinged to an upper baffle. The movable end of the upper baffle is connected with the lower baffle through a connecting rod. A stopper is adopted for carrying out layered filling and slope cutting on a downstream dam slope, so that the filling density of the dam slope is effectively guaranteed, and increase of the corresponding filling workload is small.

Description

technical field [0001] The invention relates to a hybrid dam model test device and a using method, belonging to the technical field of water conservancy engineering. Background technique [0002] As a new type of dam structure, the hybrid dam has not yet gained experience in actual engineering, and lacks systematic measured data and in-depth analysis of mechanical characteristics. The best test method is to obtain the mechanical properties of the dam body through full-scale tests or field tests, but such tests are expensive, long-period, and limited in working conditions, making repeated tests difficult. The scale model test has been widely used in the research process because of its advantages of high repeatability, simple operation and low cost. [0003] In the process of studying the mechanical properties of hybrid dams, on the one hand, the stress and deformation characteristics of the upstream concrete dam section are more concerned, and on the other hand, the sliding ...

AI Technical Summary

Problems solved by technology

The current commonly used model making method is difficult to realize the overloading of the upstream concrete dam section during the filling process of the dam body and the water storage process, and it is impossible to obtain the ultimate deformation capacity of the hybrid dam

At the same time, in the filling process of the downstream dam slope, layered filling is generally adopted, and it is difficult to ensure the compactness of the filling at the edge of the dam slope. Often, rolling or simple leveling is carried out after the model filling is completed, so that This leads to high or low strength of the dam slope, which is inconsistent with the actual project

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