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Tunnel preliminary support 3D printing device, material and method thereof

A 3D printing and tunneling technology, applied in tunnels, tunnel linings, shaft equipment, etc., can solve the problems of material waste, uneven quality, poor operating environment, etc., and achieve the effect of improving quality, fast solidification, and fast diffusion

Pending Publication Date: 2018-12-11
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the irreversible nature of the tunnel concrete primary support process and the uneven quality, large material waste, and poor working environment caused by the current construction technology, a 3D printing device for tunnel primary support is provided.

Method used

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  • Tunnel preliminary support 3D printing device, material and method thereof
  • Tunnel preliminary support 3D printing device, material and method thereof
  • Tunnel preliminary support 3D printing device, material and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: A 3D printing device for preliminary support of a tunnel, such as figure 1 As shown, it includes the transport trolley 1, the feeding assembly 2, the jet printing assembly 3 and the controller, the feeding assembly 2, the jet printing assembly 3 and the controller are all installed on the transport trolley 1, and the output of the engine of the transport trolley 1 and the controller end connection. The feeding assembly 2, such as figure 2 As shown, it includes a hopper 2-1, a screw extrusion pump 2-2, and a feeding pipe 2-3. The screw extrusion pump 2-2 is installed on the transport trolley 1, and the hopper 2-1 is installed on the screw extrusion pump 2-2. At the feed port of 2, one end of the feed pipe 2-3 is connected to the discharge port of the screw extrusion pump 2-2, and the other end is installed at the feed port of the printing nozzle 3-3-1 in the jet printing assembly .

[0030] And in order to ensure accurate material delivery, a start-stop so...

Embodiment 2

[0034] Embodiment 2: A method of using a 3D printing device for preliminary support of a tunnel, the steps are as follows:

[0035] (1) Prepare 3D printing materials according to construction requirements;

[0036] (2) Design the printing path and injection target contour, and input the design results into the controller;

[0037] (3) Transport trolley positioning;

[0038] (4) Put the 3D printing material into the hopper, and enter the feeding pipe and printing nozzle through the screw extrusion pump;

[0039] (5) The controller controls the injection arm to execute the injection operation along the planned path until the 3D printing material covers the steel arch;

[0040] (6) Scan the profile of the forming surface after the spraying is completed. If it is qualified, proceed to the next spraying process; if it is unqualified, repair and spray the cycle error until it is qualified;

[0041] (7) Repeat step (5) to step (6) until all 3D printing operations for the initial s...

Embodiment 3

[0042] Embodiment 3: A 3D printing material used for the primary support of a 3D printing device in a tunnel.

[0043] The 3D printing material is blended with concrete and additives and is viscous; the initial setting time is not more than 3 minutes, the final setting time is not more than 5 minutes, and the strength after final setting is not less than 30Mpa.

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Abstract

The invention discloses a tunnel preliminary support 3D printing device, a 3D printing material applied to the 3D printing device and a using method of the 3D printing device. The 3D printing device comprises a transport trolley, a feeding assembly, a jet printing assembly and a controller. The jet printing assembly comprises a jet base, a jet arm unit and a printing unit. Jet arms of the jet armunit are hinged to the jet base, telescopic cylinders and angular flow sensors are installed between the jet arms and the jet base and between the jet arms. The printing unit comprises a printing nozzle, a 360-degree brushing motor and a printing telescopic cylinder. The printing telescopic cylinder is connected to the jet arms, and a piston rod of the printing telescopic cylinder is vertically connected to the 360-degree brushing motor, and an output shaft of the 360-degree brushing motor is connected to the printing nozzle and drives the printing nozzle to rotate. A feeding port of the printing nozzle communicates with a material delivery pipe. According to the invention, the zero pollution and zero rebound in the initial support of a tunnel are achieved, the quality of the initial support is improved, and the state of high pollution in a current working environment is changed.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a 3D printing device, material and method for primary tunnel support. Background technique [0002] According to the requirements of the construction documents, the initial support of the tunnel should be implemented as soon as possible after excavation, preferably within 2 hours after excavation; The deformation of the support will increase. Therefore, the initial support of the tunnel is required to have sufficient strength to play a sufficient supporting role. In addition, the bridge span effect only works within 1 times the tunnel diameter. Therefore, even a better The surrounding rock should also be sprayed and anchored in time. It can be seen that the initial support process is an irrevocable construction process in the construction of tunnels and even some underground spaces. [0003] At present, there are mainly two modes of concrete operation for primary su...

Claims

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 李建斌邢泊李富兴肖威
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD