Tunnel lining structure model test device and test method

A technology of structural models and test devices, which is applied in the testing of machines/structural components, measuring devices, testing of mechanical components, etc., can solve problems such as weak, missing mountain rock pressure simulation, and incompletely consistent stress conditions, etc., to achieve The effect of safe test operation, consistency assurance and strong repeatability

Active Publication Date: 2019-08-02
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic research methods for this series of problems mainly use numerical methods for simulation calculation and analysis, while the work foundation for indoor model tests is relatively weak, and the results obtained are limited. At the same time, there are several shortcomings in the existing indoor model tests: ① For The indoor model test research of the tunnel is mostly focused on the selection of construction methods, the verification of the bearing capacity of the lining support structure design, the distribution of the tunnel seepage field, the joint bearing characteristics of the lining and surrounding rock, and the distribution and expansion of cracks after the lining cracks. ②The scale range of the existing indoor models is 1:25~1:10. Compared with the actual size of the tunnel, the scale of the existing models is relatively small, and it is difficult to accurately restore the components of the lining struc

Method used

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  • Tunnel lining structure model test device and test method
  • Tunnel lining structure model test device and test method

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Embodiment 1

[0053] Embodiment 1: as Figure 1-6b As shown, the tunnel lining structure model test device of the present invention includes a pressure chamber 1 , a lining layer 2 , a stress loading mechanism 3 and a monitoring system 4 . The pressure chamber 1 comprises a front hatch 11, a cabin body 12 and a rear hatch 13. The front hatch 11 is provided with an internal water pressure gauge 111, an inner cavity drain valve 112, an inner sealing ring 113, an outer sealing ring 114, bolts 115, bolts Holes 116 and ribs 117; the cabin body 12 is provided with a stress loading valve external joint 121, a stress loading valve internal joint 122, an external cavity water injection pressure valve 123, a concrete pouring hole 124, an external cavity exhaust valve 125, and an external cavity drainage valve 126. Outer water pressure gauge 127, monitoring instrument cable outlet 128, base 129 and bolt holes 115, filament geotextile 14 is laid on the inner wall of cabin body 12 to prevent concrete fr...

Embodiment 2

[0069] Embodiment 2: The difference from Embodiment 1 is that in Embodiment 2, a surrounding rock simulation layer is also provided between the lining layer 2 and the inner wall of the cabin body 12. The surrounding rock simulation layer is cylindrical in shape as a whole, and is set by the Concrete pouring and molding can simulate different strengths of surrounding rock grades by pouring different grades of concrete. The outer wall of the surrounding rock simulation layer is attached to the inner wall of the cabin body 12, and the two ends of the cylinder body of the surrounding rock simulation layer are flush with the two end surfaces of the cabin body 12.

[0070] A test method for a tunnel lining structure model test device, comprising the following test steps:

[0071] Step 1: Pouring and installing the surrounding rock simulation layer, including:

[0072] Install and fix the rear deck 13, lay the filament geotextile 14 on the inner wall of the cabin body 12, connect the...

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Abstract

The invention discloses a tunnel lining structure model test device and test method. The test device comprises a pressure cabin, a stress loading mechanism, a lining layer and a monitoring system. Thepressure cabin comprises a front cabin door, a cabin body and a back cabin door; the lining layer may be poured by plain concrete, reinforced concrete or ring anchor prestressed concrete or the like,and in addition, a surrounding rock simulation layer may be arranged between the lining layer and an inner wall of the cabin body; the stress loading mechanism comprises a loading chamber, a pressuretube, a pressure collection valve and a pressure water pump; the monitoring system comprises a monitoring instrument and a data collection instrument; and the test method comprises the manufacture and installation of the lining layer, the installation of the stress loading mechanism and the monitoring system, loading of different internal and external loads, and data collection and processing analysis.

Description

technical field [0001] The invention relates to a tunnel lining structure model test device and test method, which is suitable for the research on the strength, deformation characteristics and safety of the lining structure under the complex boundary conditions of underground engineering, and can also be used for the combined bearing characteristics and lining of different types of linings and different grades of surrounding rocks. Indoor simulation research on cracking characteristics and internal and external water seepage characteristics. Background technique [0002] In recent years, with the construction of a large number of water diversion projects and road projects, the application of various types of tunnels has become more and more extensive. Due to the particularity of the tunnel structure and load bearing, as well as the imperfection of design theory and calculation methods, there are still many problems. The key issues that need to be further studied and solved, ...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/06G01N15/08G01M13/00
CPCG01M13/00G01N3/06G01N3/12G01N15/0826G01N2203/0019G01N2203/0048G01N2203/006G01N2203/0611
Inventor 刘立鹏汪小刚傅睿智王玉杰赵宇飞段庆伟王斌孙兴松曹瑞琅皮进张强孙平姜龙林兴超冷合勤李昌博陈晨
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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