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A multi-functional micro-tunneling model test system

A technology for tunneling and model testing, which is applied to the testing of machines/structural components, instruments, measuring devices, etc., and can solve the problem of inability to simulate the effect of the rotation of the roadheader on the excavation surface, single function of the roadheader model, and low scalability and other issues to achieve the effect of shortening the design and production cycle, reducing labor intensity and facilitating maintenance

Active Publication Date: 2019-01-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with the above-mentioned excavation method is that it can only simulate the change of the excavation surface pressure, but cannot simulate the whole process of excavation by the roadheader and the effect of the rotation of the cutterhead on the excavation surface.
A small number of circular tunnel models are designed with cutterheads for mechanical excavation, but the manufacture of cutterheads is usually simplified and irreplaceable, and the functions that can be realized by roadheader models are relatively simple and the scalability is low

Method used

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  • A multi-functional micro-tunneling model test system
  • A multi-functional micro-tunneling model test system
  • A multi-functional micro-tunneling model test system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 (simulation of mud-water balance shield)

[0035] like figure 1 As shown, the multifunctional micro-shield tunnel model test system of the present invention includes four parts: a test platform 1 , a micro-tunnel boring machine 2 , a mud circulation system 3 and a power control system 4 . The mud-water balance shield tunnel excavation model test can be carried out through the test system.

[0036] Before the test, first install the test platform 1, such as figure 2 shown. The test platform 1 is composed of aluminum alloy square tube profile beams and columns 5 through connectors 6 to assemble the frame structure, and the platform steel plate 7 is fixed on the upper part of the test platform 1 by bolts. There are leveling bolts 8 under the four table feet of the test platform 1, and the leveling bolts 8 should be adjusted before the test so that the platform steel plate 7 is in a horizontal state. The test platform 1 is fixed on the ground through anchors 9 ...

Embodiment 2

[0042] Example 2 (simulation of earth pressure balance shield)

[0043] like figure 1 As shown, the multifunctional micro-shield tunnel model test system of the present invention includes four parts: a test platform 1 , a micro-tunnel boring machine 2 , a mud circulation system 3 and a power control system 4 . The excavation model test of earth pressure balance shield tunnel can be carried out by this test system.

[0044] according to Figure 1~Figure 5 Install and configure the test system.

[0045] When simulating the earth pressure balance shield, it is necessary to adopt the opening sealing plate 28, cancel the waste slurry tank 45, the slurry outlet pipe 48, the slurry outlet pressure gauge 49 and the slurry inlet pressure gauge 47, and replace the mud in the mud pool 44 as a lubricant (water or Foam).

[0046] like Figure 6 As shown, four first bolt holes 29 are opened on the upper part of the opening sealing plate 28 for connecting with the rotating power system;...

Embodiment 3

[0048] Embodiment 3 (simulated rock tunnel boring machine)

[0049] like figure 1 As shown, the multifunctional micro-shield tunnel model test system of the present invention includes four parts: a test platform 1 , a micro-tunnel boring machine 2 , a mud circulation system 3 and a power control system 4 . The rock tunnel excavation model test can be carried out through the test system.

[0050] according to Figure 1~Figure 5 Install and configure the test system.

[0051] When simulating a rock tunnel boring machine, the opening sealing plate 28 is used, and the earth pressure box 35 is canceled. In the rock tunnel simulation test, rock-like materials (gypsum, cement, etc.) are generally used to simulate the rock mass, and the existence of water is not considered, so no mud or lubricant is needed, so the mud circulation system 3 is cancelled.

[0052] In the test preparation stage, the first part of the multifunctional micro-shield tunnel model test system is assembled a...

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Abstract

The invention relates to a multifunctional small-size tunnel boring model testing system, which comprises a testing platform, a slurry circulating system, a small-size tunnel boring machine and a power control system. The upper end of the testing platform is fixedly provided with a boring machine progressing guide rail, a control system working cabinet, and a propelling force driven motor. The slurry circulating system is capable of pumping slurry or lubricant, discharging wasted slurry and detecting the pressure of the slurry. The small size tunnel boring machine consists of a connection part, a duct piece part and a machine head part. Through the introduction of the duct piece part to regulate the boring length, the front end of the machine head is provided with a cutting plate to excavate a rock-soil body and the radius of back end of the machine head is relatively smaller than that of the front end and is used to simulate the ground layer loss. The power control system is used to control the boring direction and the speed of the small size tunnel boring machine as well as the rotation direction and the speed of the cutting plate. According to the invention, the various functions of the system are independent from each other, and the system is highly expandable. Through the adding and reducing of relevant components, it is possible to simulate different working states of a tunnel boring machine so as to meet the requirement of scientific research on boring simulation.

Description

technical field [0001] The invention relates to a tunnel excavation model test system, in particular to a multifunctional miniature tunnel excavation model test system. Background technique [0002] At present, tunnel boring machines have been widely used in various types of tunnel excavation. In recent years, the construction of urban subway tunnels, municipal water supply and drainage tunnels, and mountain railway (highway) tunnels has an increasing demand for tunnel boring machines, followed by more problems to be solved. Especially in the face of some difficult projects, theoretical analysis and numerical analysis can not take into account the actual complex situation, at this time must use the means of laboratory experiments to simulate the actual project. At present, the more commonly used tunneling tests are mainly divided into two types: the semicircular tunnel model and the circular tunnel model using the principle of symmetry. Semi-circular tunnel models do not h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
CPCG01M99/00
Inventor 张子新李佳宇王帅峰黄昕
Owner TONGJI UNIV