Combined mold for researching crushing mechanism of extrusion edge walls

Abstract

The invention discloses a combined mold for researching a crushing mechanism of extrusion edge walls. The combined mold comprises a first gypsum layer and a second gypsum layer which are oppositely arranged, a panel layer is sandwiched between the first gypsum layer and the second gypsum layer, and an angle is formed between the panel layer and the first gypsum layer; one side face of the panel layer fits the first gypsum layer, multiple extrusion edge walls are fixedly connected to the other side of the panel layer, the space between the extrusion edge walls and the second gypsum layer is filled with a padding layer, and the padding layer is parallel to the panel layer. The combined mold for researching the crushing mechanism of the extrusion edge walls can be applied to researching of the crushing mechanism of the extrusion edge walls under a complex load.

Description

technical field [0001] The invention belongs to the technical field of water conservancy devices, and relates to a combination die for studying the crushing mechanism of an extruded side wall, in particular to a combined die for studying the crushing mechanism of an extruded side wall of a high face rockfill dam under complex loads . Background technique [0002] With the continuous improvement of extruded sidewall construction technology and construction equipment, it has been widely used in high face rockfill dam projects at home and abroad. At the same time, a large number of scholars have done a lot of research on extruded sidewall. Carefully read and analyze a large number of previous studies on extruded side walls, which can be summed up in the following aspects: (1) The influence of panel stress and strain with or without extruded side walls and the cause analysis of panel cracks were studied. In this type of research, the finite element simulation software is often ...

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Problems solved by technology

Ren Zhifeng et al. analyzed the action mechanism of the extruded side wall. According to the qualitative analysis, because the concrete material of the extruded side wall is dry lean concrete with low strength and low elastic modulus, the upstream water pressure and other loads during the operation of the dam Under this condition, the extruded side wall will be gradually crushed and eventually become a part of the cushion material, but this qualitative speculation needs further experimental research and demonstration; Cheng Lin is conducting temperature changes and extruded side wall constraints In the analysis of the impact of face cracking on the Gongboxia face dam, the extruded side wall is considered as a non-linear elastic material homogeneous to the cushion material. The side wall may not be completely crushed, and there may be local strong constraints on the panel by the side wall. For this reason, the sensitivity analysis of the panel stress to the tangential stiffness parameter of the side wall is also carried out ; Cheng Jinbiao used the method of large-scale triaxial test to study the crushing mechanism and cracking location of the extruded side wall under the load along the slope and the normal load.

However, in actual engineering, it is impossible for the side wall to be only subjected to a single direction load, but to be broken under the simultaneous action of the slope direction and the normal direction load.

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