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Cement-based 3D printing rock mass model crack filling device and method

A 3D printing and filling device technology, applied in the field of 3D printing and rock mass engineering, can solve the problems of material parameter difference, excessive filling material difference, inaccurate geometric positioning of cracks, etc., achieving a high degree of automation, a wide range of applications, forming great effect

Pending Publication Date: 2022-07-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cracks produced by the current 3D printing equipment are still not filled or only filled with unbonded raw material powder, the filling effect is not good, the cracks are easy to close, and there is still a big gap between the crack mechanical parameters and the crack filling material
For example, a powder bonded 3D printing equipment and method for preparing complex geological models with the publication number CN112172139A, and a cement-based 3D printing technology for making tunnel test geological models with the publication number CN112895058A, both need to solve the problem of 3D printing rock mass The problem of poor filling effect of model cracks and differences in material parameters
In view of the above-mentioned practical problems, the present invention provides a cement-based 3D printing rock mass model fissure filling equipment and method to solve the problem of inaccurate geometric positioning of fissures, difficulty in making fissures with complex shapes, poor filling effect and material parameters and natural fissure filling substances The problem of too much difference

Method used

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  • Cement-based 3D printing rock mass model crack filling device and method
  • Cement-based 3D printing rock mass model crack filling device and method
  • Cement-based 3D printing rock mass model crack filling device and method

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Effect test

Embodiment 1

[0030] refer to figure 1 , the present invention provides a cement-based 3D printing rock mass model crack filling device, comprising a mechanical arm 10, a feeding mechanism is installed at one end of the mechanical arm 10, and the feeding mechanism includes a barrel 1 fixed to the mechanical arm 10, the capacity of the barrel 1 It is 300ml, the barrel wall is transparent, the material barrel 1 is provided with a fissure filling material 5, the bottom of the barrel 1 is provided with a fractured rock mass geological model 11, the side of the barrel 1 away from the mechanical arm 10 is fixed and connected with an air supply mechanism, The air supply mechanism includes an air pump 9 in communication with the cartridge 1 .

[0031] In the present invention, by setting the mechanical arm 10 and installing the mechanical arm 10 with the feeding mechanism, the mechanical arm 10 has high geometric precision, accurate positioning and high degree of automation. The amount of crack fi...

Embodiment 2

[0051] On the basis of Example 1, refer to Figure 2-3 , the piston 4 includes a connecting seat 12 slidably connected in the barrel 1, the bottom of the connecting seat 12 is fixed with a connecting pad 13, the connecting pad 13 is in contact with the crack filling material, and the top surface of the connecting seat 12 is provided with a first groove 14. One end of the first groove 14 is rotatably connected with a rotating handle 15, one end of the first groove 14 is installed with a movable shaft 16, the movable shaft 16 is hinged with a rotating handle 15, and the first groove 14 is away from the movable shaft 16. One end is provided with an arc surface, the end of the rotating handle 15 away from the movable shaft 16 is provided with a second groove 17 , and the outer wall of the rotating handle 15 is provided with a plurality of third grooves 18 .

[0052] When it is necessary to add the fissure filling material 5 in the barrel 1, the piston 4 needs to be taken out, firs...

Embodiment 3

[0057] On the basis of Example 1 and Example 2, refer to Figure 4 , one end of the airtight bayonet connector 6 is fixedly connected with the conduit 7 through the connecting mechanism, and the other end of the airtight bayonet connector 6 is provided with a threaded interface, through which the airtight bayonet connector 6 is connected to the barrel 1 and the air pressure respectively The valve 8 is fixed and communicated.

[0058] The connecting mechanism includes a first chute 22 symmetrically arranged in the inner wall of one end of the closed bayonet connector 6 close to the conduit 7, the first chute 22 is slidably connected with a limit block 23, and the limit block 23 is located in the first chute 22. One end is fixedly connected with a spring 24 which is fixedly connected with the inner wall of the airtight bayonet connector 6 .

[0059] A sixth groove 26 is provided at the port of the conduit 7 that is close to the airtight bayonet connector 6 . The sixth groove 26...

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Abstract

The invention discloses a cement-based 3D printing rock mass model crack filling device and method.The cement-based 3D printing rock mass model crack filling device comprises a mechanical arm, a feeding mechanism is installed at one end of the mechanical arm, the feeding mechanism comprises a charging barrel fixedly connected with the mechanical arm, a crack filling material is arranged in the charging barrel, and a crack rock mass geologic model is arranged at the bottom of the charging barrel; the side, away from the mechanical arm, of the material barrel is fixedly connected with and communicates with an air supply mechanism, the air supply mechanism comprises an air pump and an air pressure adjusting valve which communicate with the material barrel, and the cement-based 3D printing rock mass model crack filling device can be used for manufacturing rock mass cracks with complex geometrical shapes, contains a crack filling material, is extremely good in forming effect, and is suitable for large-scale popularization and application. The fracture mechanical property is closer to that of a natural rock mass fracture; according to the invention, the material ratio of the matrix to the fracture filling substance can be flexibly changed, and the fractured rock mass geologic model with a wider application range can be manufactured.

Description

technical field [0001] The invention relates to the technical field of 3D printing and rock mass engineering, in particular to a cement-based 3D printing rock mass model crack filling device and method. Background technique [0002] As a naturally formed geological body, rock mass contains a large number of fissures, and these fissures have a key impact on the strength, deformation and seepage characteristics of the rock mass. In the natural state, the fissures in the rock mass are not hollow, but are filled with a large amount of muddy or sandy debris. In traditional rock mass model making, fissures are often artificially carved in natural rocks or inserted into thin slices to make fissures when pouring rock-like materials. For example, a method for producing a rock sample model with intermittently filled fractures with publication number CN104833555A and a method for producing a cylindrical rock sample with three-dimensional joints and fractures with publication number CN...

Claims

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Application Information

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IPC IPC(8): B28B13/02B28B19/00
CPCB28B13/02B28B19/00
Inventor 马国伟王酉钰李之建王里
Owner BEIJING UNIV OF TECH
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