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Loading device and method for horizontal tension test for quasi-rectangular shield segment

A technology of shield segment and loading device, which is applied in the field of tunnel shield, can solve the problem of less lining test and achieve the effect of convenient operation.

Pending Publication Date: 2019-07-12
宁波用躬科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, tunnel lining test research is divided into two categories: segment test and full-ring test. The 1:1 prototype lining full-ring structure test is the most effective means to study structural performance. Previous tunnel lining full-ring tests at home and abroad are mostly circular shields. However, there are few lining tests for similar rectangular shield tunnels.

Method used

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  • Loading device and method for horizontal tension test for quasi-rectangular shield segment
  • Loading device and method for horizontal tension test for quasi-rectangular shield segment
  • Loading device and method for horizontal tension test for quasi-rectangular shield segment

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: As shown in the figure, a horizontal tension test loading device for a rectangular shield segment 7 includes

[0029] The central reaction force device 1 is composed of a reaction force frame 3 and a first adjustment support 4, the reaction force frame 3 is located on the inner side of the shield segment 7, and the first adjustment support 4 is connected to the bottom of the reaction force frame 3;

[0030] The loading device 2 is composed of a plurality of loading mechanisms 5 acting on the shield segment 7 and a plurality of horizontally distributed force transmission members 6. The plurality of loading mechanisms 5 are distributed at intervals and are surrounded by the shield segment 7. On the outside, one end of the force transmission member 6 is connected to the corresponding loading mechanism 5 , and the other end of the force transmission member 6 is connected to the reaction force frame 3 .

[0031] In this embodiment, each loading mechanism 5 incl...

Embodiment 2

[0040]Embodiment 2: As shown in the figure, a loading method using a horizontal tension test loading device for a similar rectangular shield segment comprises the following steps,

[0041] S1: place the reaction frame 3 on the first adjustment support 4;

[0042] S2: place the shield segment 7 on the periphery of the reaction frame 3, and install a support with steel balls on the bottom of the shield segment 7;

[0043] S3: arrange the second adjusting support 53 along the outer contour of the shield segment 7, place the loading beam 51 on the second adjusting support 53, and cling to the outer wall of the shield segment 7, and then fix the loading member 52 on the loading beam 51;

[0044] S4: Connect one end of the force transmission part 6 with the loading part 52, and fix the other end of the force transmission part 6 on the reaction force frame 3;

[0045] S5: After the installation is completed, the loading member 52 slowly applies a load until a preset requirement is ...

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Abstract

The invention discloses a loading device and method of a horizontal tension test for a quasi-rectangular shield segment. The loading device comprises a central counter-force device and a loading forceapplication device, wherein the central counter-force device is composed of a counter-force frame and a first adjusting support, wherein the counter-force frame is located at the inner side of the shield segment, and the first adjusting support is connected to the bottom of the counter-force frame; the loading force application device is composed of a plurality of loading mechanisms acting on theshield segment and a plurality of horizontally distributed force transferring pieces, the plurality of loading mechanisms are distributed at intervals and arranged around the shield segment, one endof each force transferring piece is connected to the corresponding loading mechanism, and the other ends of the force transferring pieces are connected to the counterforce frame. The loading device has the advantages of being convenient to operate and capable of effectively testing the performance of the quasi-rectangular shield segment.

Description

technical field [0001] The invention relates to the technical field of tunnel shielding, in particular to a horizontal tension test loading device and a loading method for a rectangular shield segment. Background technique [0002] In recent years, with the increasing use of urban underground space, shield construction technology has been widely used in various underground projects due to its advantages of low impact on the surrounding environment, high safety, high molding quality and fast construction progress. Among them, it has become the main construction method for underground large-scale projects such as subway tunnel projects and municipal pipeline projects. [0003] Before the new tunnel lining is applied to actual engineering, it is necessary to carry out structural stress analysis and tests on the shield segments used. At present, tunnel lining test research is divided into two categories: segment test and full-ring test. The 1:1 prototype lining full-ring struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 董子博周俊宏徐森陆幸吴彩霞柳琦
Owner 宁波用躬科技有限公司
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