Model body manufacturing device and method for reserving grotto in geomechanical model test

Abstract

The invention discloses a device and a method for manufacturing a model body of a reserved cavern for a geomechanical model test. The device comprises a base, a cross-shaped inner support and at least one section of cylindrical side plate, each section of cylindrical side plate comprises four parallel-edge arc-shaped column side plates and four right-angle fan-shaped column side plates, and the parallel-edge arc-shaped column side plates and the right-angle fan-shaped column side plates are alternately spliced together to form the cylindrical side plate; the bottom of the cylindrical side plate is fixed on the base, and the cross-shaped inner support is inserted into the cylindrical side plate. By changing the size and the shape of the side plate, the model body with any size and any hole type can be manufactured. The problems that in a geomechanical model test, reserved caverns are difficult to manufacture, and different types of caverns are difficult to prefabricate are solved, meanwhile, the device has the advantages of being simple in structure, convenient to disassemble, practical, reliable and low in price, operation methods such as installation and disassembly are easy to master, and the device has very wide application and popularization value.

Description

technical field [0001] The invention relates to an underground engineering test device, in particular to a device and an operation method for making a reserved cavern model body in a model test. Background technique [0002] Physical model test is an important research method in underground engineering research, especially for major projects with complex geological environment and difficult construction, the superiority of model test in providing test data before design and construction will be more prominent. [0003] Most of the geomechanical model tests are based on the layered and integral filling of the model body, and are carried out according to the principle of "loading first, then excavation". In the model test research of deep cavern partition rupture and rock-salt gas storage, it is often necessary to reserve caverns in advance while filling similar materials, and then study the model body of the reserved caverns. At present, there are few researches on the model...

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Problems solved by technology

[0005] The invention patent with application number 201110337973.0 discloses a three-dimensional cavity forming method and device for true three-dimensional model testing. The device can realize the production of a three-dimensional cavity three-dimensional geomechanical model in line with actual engineering, but the operation process of the device is relatively complicated , it is only suitable for one-time forming of the cavity, and the reserved hole must be sealed with similar materials after forming, which will inevitably cause irregular local cavity shape

[0006] The invention patent with application number 201110287254.2 discloses a positioning and forming method for buried caverns in geomechanical model tests. This device can realize precise spatial positioning of buried caverns with different shapes and different diameters. After the compaction is completed, take out the wooden mold by one-time drafting to form a cavity, and the disturbance to the buried cavern will be difficult to avoid

[0007] The invention patent with application number 201110067678.8 discloses a cavity-forming device for buried caverns in underground engineering model tests. The production applicability of model test rock mass is poor

[0008] The invention patent with application number 201910936500.9 discloses a concrete shaft shaft model making device, which realizes one-time molding of concrete pouring by restricting the positions of the inner and outer barrels, and cannot achieve layering of similar materials in the process of making the model body compaction effect

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