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Loading device and method for shield tunnel lining ring full-scale test

A shield tunneling and loading device technology, which is applied in the direction of measuring devices, using stable tension/pressure testing material strength, instruments, etc., can solve the problems of inability to simulate bias pressure, local resistance changes, inability to simulate passive resistance of soil, Problems such as the inability to realize the simultaneous change of loads, etc., achieve the effect of wide applicability and accuracy

Pending Publication Date: 2019-12-27
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1) Regardless of soil pressure or water pressure simulation, only symmetrical loads can be applied, and working conditions such as bias pressure and local resistance changes cannot be simulated;
[0008] 2) The loads applied to the structure by the existing test devices are all active loads, which cannot simulate the passive resistance of the soil;
[0009] 3) In the load adjustment process of existing equipment, the load change can only be realized through multiple local adjustments, that is, the load can be increased by anchoring after tensioning one by one or one by one, and the overall load cannot be changed synchronously. Gradual deformation is related to the tension loading sequence, which is quite different from the actual stress state of the structure, and cannot accurately reflect the actual mechanical characteristics of the lining structure

Method used

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  • Loading device and method for shield tunnel lining ring full-scale test
  • Loading device and method for shield tunnel lining ring full-scale test
  • Loading device and method for shield tunnel lining ring full-scale test

Examples

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Embodiment 1

[0033] see Figure 2-5 , the embodiment of the present invention provides a shield tunnel lining ring full-scale test loading device, including a jack 1 for applying force, a resistance spring 4, and an annular reaction wall 2. Wherein, the reaction wall 2 has a test area for placing the ring-shaped test segment 3, one end of the jack 1 and one end of the resistance spring 4 are installed on the reaction wall 2, The other end of the jack 1 and the other end of the resistance spring 4 both act on the test tube piece 3 . In the existing technology, such as figure 1 As shown, in the loading test of the test segment 3, the ring of the shield tunnel test segment 3 is usually placed parallel to the horizontal ground, that is, multiple test segments 3 are piled up, and then a pair of main and paired pulleys are arranged outside the ring. Beam 80 and a pair of secondary tension beams 81, and between two main tension beams 80 and between two secondary tension beams 81, tension anchor...

Embodiment 2

[0044] see Figure 2-5 , an embodiment of the present invention provides a full-scale test loading method for a shield tunnel lining ring, including the following steps: S1, excavating an annular foundation pit downward on the ground, and using the side wall of the foundation pit as a reaction wall 2; S2, placing the ring-shaped test segment 3 to be tested in the foundation pit; S3, using a jack 1 and a resistance spring 4 between the reaction wall 2 and the test segment 3, and placing the One end of the jack 1 and one end of the resistance spring 4 are installed on the reaction wall 2, and the other end of the jack 1 and the other end of the resistance spring 4 act on the test segment 3 on. In this embodiment, a ring-shaped foundation pit is excavated below the ground, and then the side wall of the foundation pit is poured with reinforced concrete to obtain the reaction wall 2, and at the same time, reinforced concrete is poured at the bottom to make the floor 6, and the tes...

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Abstract

The invention relates to the technical field of shield tunnels, and provides a loading device for shield tunnel lining ring full-scale test. The device comprises a jack for applying force, and furthercomprises a resistance spring and an annular reaction wall, wherein a test area for placing an annular test duct piece is arranged in the reaction wall, one end of the jack and one end of the resistance spring are both arranged on the reaction wall, and the other end of the jack and the other end of the resistance spring are both acted on the test duct piece. The invention further discloses a loading method for shield tunnel lining ring full-scale test. The continuous change among different working conditions can be realized by adjusting the jack pressure, the mechanical characteristics of the test duct piece in the whole loading process of a full-scale test can be simulated, the adjustment on different strata and different stress modes by the resistance spring can be realized, and the action of asymmetric load can be realized; and the loading device and method have wider applicability and accuracy.

Description

technical field [0001] The invention relates to the technical field of shield tunnels, in particular to a full-scale test loading device and method for lining rings of shield tunnels. Background technique [0002] As shield tunnels are widely used in the field of engineering construction, research on shield tunnels has also achieved a lot of research results. Experimental research is an important means of carrying out relevant scientific research. One of its important components—structural full-scale test (also called structural prototype test) is a test method that can directly reflect the mechanical properties of structures. Compared with other tests, it is more intuitive, accurate features. However, as the actual size of engineering structures is getting larger and larger, the corresponding test loading devices must also be matched synchronously, and the existing prototype test loading equipment and test devices have limited functions, which limits the application of pro...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/02
CPCG01N3/02G01N3/12G01N2203/0003G01N2203/0019G01N2203/0042
Inventor 孙文昊王均勇谢俊何应道
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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