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Prefabricated structural surface concrete single-hole blasting test device and test method

A prefabricated structure and blasting test technology, applied in the direction of measuring devices, optical devices, electromagnetic measuring devices, etc., to achieve the effects of strong practicability, improved energy utilization rate and rock breaking efficiency, and simple operation

Pending Publication Date: 2020-03-27
CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, for SC-CO 2 Most of the research on phase change fracturing technology focuses on engineering applications, especially for SC-CO 2 There is still a lot of work to be done on theoretical and experimental research under the action of phase change gas-action

Method used

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  • Prefabricated structural surface concrete single-hole blasting test device and test method
  • Prefabricated structural surface concrete single-hole blasting test device and test method

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Embodiment Construction

[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0048] See figure 1 and figure 2 , the embodiments of the present invention provide a prefabricated structural surface concrete single-hole blasting test device, including a test box 1, a concrete specimen 2, a CO 2 Phase change cracker, foil resistance strain gauge, high-speed digital camera 3, pressure device, digital image processing system and ultra-dynamic strain testing system.

[0049] See figure 1 , the test box 1 has a space for accommodating the concrete specimen 2, the middle part of the concrete specimen 2 is drilled with a blast hole 21, and the top surface is provided with a plurality of circular speckles, the diameter of which is 0.25mm ~0.5 mm, the top of the test box 1 is transparent, and a perforation 11 opposite to the blast hole 2...

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Abstract

The invention provides a prefabricated structural surface concrete single-hole blasting test device and test method. The test method comprises the following steps: preparing a concrete test piece by using a similar material, drilling a hole in the concrete test piece to form a blasting hole, prefabricating a structural surface on the concrete test piece, and putting an energy release head of a CO2phase change cracker into the blasting hole; applying radial pressure and axial pressure to the concrete test piece; arranging strain monitoring points at the end parts of the structural surfaces; connecting the high-speed digital camera synchronously with the exploder, triggering shooting at the same time and continuously collecting image information of the surface of the concrete test piece inthe blasting process; and recording a displacement field and a strain field on the surface of the concrete test piece in the observation area by using a digital image correlation method. The technical scheme provided by the invention has the beneficial effects that the crack propagation behavior of the concrete of the prefabricated structural surface for SC-CO2 phase change gas-action and the change characteristics of the displacement field and the strain field of the moving crack can be obtained, and the crack propagation rule of the concrete of the prefabricated structural surface for SC-CO2 phase change gas-action is disclosed.

Description

technical field [0001] The invention relates to the technical field of blasting engineering, in particular to a single-hole blasting test device and a test method for prefabricated structural surface concrete. Background technique [0002] As an efficient means of excavation and rock breaking, explosive blasting is widely used in the field of engineering construction in various countries in the world. However, due to the complex physical and chemical process and the instantaneous release of a large amount of energy in explosive explosion, there are a series of problems such as uncontrollable blasting energy and high safety hazards. SC-CO 2 As a physical blasting technology, phase change fracturing technology produces harmless, flame-retardant gas and has no sparks during the action process. Its safety and environmental protection are far superior to traditional explosive blasting, and its rock-breaking efficiency is much higher than static crushing, Hydraulic fracturing. ...

Claims

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Application Information

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IPC IPC(8): G01N3/313G01N3/06G01B11/16G01B7/16
CPCG01N3/313G01N3/06G01B11/162G01B7/18G01N2203/001G01N2203/0066G01N2203/0062G01N2203/0298G01N2203/0641G01N2203/0682G01N2203/0676
Inventor 杨幼江朱禧高博余军余红安罗学东蒋楠
Owner CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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