CN203069393U - Mechanical test model of shield tunnel segmental lining - Google Patents
Mechanical test model of shield tunnel segmental lining Download PDFInfo
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- CN203069393U CN203069393U CN 201320059555 CN201320059555U CN203069393U CN 203069393 U CN203069393 U CN 203069393U CN 201320059555 CN201320059555 CN 201320059555 CN 201320059555 U CN201320059555 U CN 201320059555U CN 203069393 U CN203069393 U CN 203069393U
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Abstract
The utility model discloses the mechanical test model of a shield tunnel segmental lining, which comprises an integrally casted segment ring made of similar materials. The segment ring is provided with grooves for simulating the stiffness weakening effect of a segment joint. The mechanical test model is characterized in that the segment ring is divided into an upper region (1a), a lower region (1b), a left region (1c) and a right region (1d). The groove (2a) for simulating the stiffness weakening effect of the segment joint within the upper region (1a) and the lower region (1b) is positioned at the inner side of the segment ring. The groove (2b) for simulating the stiffness weakening effect of the segment joint within the left region and the right region is positioned at the outer side of the segment ring. Due to the adoption of the mechanical test model, the mechanical properties of the segment joint part of a shield tunnel can be better simulated. In particular, the large deformation and the progressive destruction process of the shield tunnel segmental lining can be well simulated. The mechanical test model is small in test error and can provide more accurate and more reliable test data for the design, construction, maintenance and reinforcement of tunnels.
Description
Technical field
The utility model relates to a kind of shield tunnel test model.
Background technology
At present, shield tunnel is because himself advantage, in urban track traffic, more obtained application more and more widely in the construction of river passage over strait and municipal pipeline etc.Shield tunnel mainly adopts girth joint that the single shell lining section of jurisdiction of a plurality of arcs is spliced into the section of jurisdiction ring, by landing edge the section of jurisdiction ring is assembled into shield tunnel with straight joint or fissure of displacement mode again.Because the difference of complicacy, tunnel scale and the detail structure of engineering hydrogeological condition, and shield tunnel need disclose the mechanical characteristic of shield tunnel segment lining structure by model investigation usually to the high request of engineering safety.In view of the complicacy of shield tunnel segment joint, in implementing shield tunnel model test process, mechanics effect how to consider shield tunnel segment joint is an important problem.
Find that by the literature search to prior art in existing mechanical model test, the mechanical test model that the mechanical characteristic of simulation shield tunnel adopts mainly contains following two kinds:
First kind of mechanical test model is to revise usage as theoretical foundation, with the reduction of the reduction equivalence shield tunnel segment joint position bendind rigidity of the whole bendind rigidity of pipe-plate lining ring, consider that the section of jurisdiction girth joint is to the influence of shield tunnel segment lining structural mechanics characteristic.Thereby adopt circular configurations such as the even metal tube of material, organic material pipe as the mechanical test cast material, according to shield tunnel lateral stiffness equivalence principle, determine mechanical test model lining thickness, this mechanical test model only can approximate simulation pipe-plate lining structure in process of the test whole mechanical characteristics, but owing to mechanical characteristics such as the stress raisers effect that can't reflect the pipe-plate lining joint area and joint rotations, the internal force of the tunnel duct piece that model test obtains and deformation rule and prototype tunnel difference are bigger.
Second kind of mechanical test model is Tongji University's utility model patent (publication number: CN101299008A), integrated poured the forming of analog material of configuration adopted in this model section of jurisdiction, rigidity reduction effect for girth joint, landing edge, be achieved by cutting out corresponding groove in the ring outside, section of jurisdiction corresponding to girth joint, landing edge position, depth of groove determines by calculating according to the equivalent stiffness principle, as shown in Figure 2.
In above-mentioned two kinds of models, second kind of model since its handling the requirement that this model of duct piece connector has guaranteed the model ratio of similitude to a certain extent, more approaching with actual conditions, therefore be widely accepted and use.But in fact the section of jurisdiction ring is under the external load effect based on vertical load, and it is distinguishing that the distortion of its different parts and internal force distribute: vault, position, arch bottom are subjected to the sagging moment effect, and the inboard, section of jurisdiction is pointed in displacement, and inboard tension is encircled in this section of jurisdiction, position; Left side haunch, right haunch position are subjected to the hogging moment effect, and the outside, section of jurisdiction is pointed in displacement, this ring outside, section of jurisdiction, position tension.The joint (the bolt connecting portion of adjacent section of jurisdiction) of actual section of jurisdiction ring should show as section of jurisdiction ring tension side and open, and this model is all driveed in the ring outside, section of jurisdiction for the groove of simulative tube strip terminal, it is (inboard continuous to cause the section of jurisdiction ring to be positioned at the joint at vault and the arch end, no groove) can't open, thereby cause the stress that should not have to concentrate, its distortion and stress and actual inconsistent.Error of test data is big, and especially when simulation shield tunnel segment lining structure was born ultimate load generation large deformation and progressive failure, this error of bringing owing to the joint processing mode more will be exaggerated.Be difficult to that design, construction and maintenance to the tunnel provides accurately, test figure reliably.
The utility model content
The technical problems to be solved in the utility model is to propose a kind of shield tunnel segment lining mechanical test model, this kind test model can better be simulated the mechanical characteristic at shield tunnel segment joint position, especially can well simulate large deformation and the progressive failure process of shield tunnel segment lining; Test error is little, can reinforce design, construction and the maintenance in tunnel accurate more, reliable test figure is provided.
The technical scheme that its technical matters that solves the utility model adopts is, a kind of shield tunnel segment lining mechanical test model, comprise that it is characterized in that: described section of jurisdiction ring is divided into upper area, lower area, left field, right side area by the integrated poured groove that has simulative tube strip terminal rigidity reduction effect on section of jurisdiction ring, the section of jurisdiction ring that forms of analog material; The groove of the simulative tube strip terminal rigidity reduction effect of upper area and lower area is driveed in the inboard of section of jurisdiction ring, and the groove of the simulative tube strip terminal rigidity of left side, right side area reduction effect is driveed the outside at the section of jurisdiction ring.
Compared with prior art, the beneficial effects of the utility model are:
The utility model is when adopting the reduction of groove simulation joint area rigidity, considered the stressed and deformation characteristic under the ring different parts outer load of section of jurisdiction, whole section of jurisdiction ring has been carried out the subregion processing: wherein, top, zone, bottom (vault, the arch end) are subjected to the sagging moment effect, the inboard, section of jurisdiction is pointed in displacement, inboard tension is encircled in this section of jurisdiction, zone, and corresponding groove is driveed at the section of jurisdiction ring inboard; And left side, zone, right side (left haunch, right haunch) are subjected to the hogging moment effect, and the outside, section of jurisdiction is pointed in displacement, this ring outside, section of jurisdiction, zone tension, and corresponding groove is driveed in the ring outside, section of jurisdiction.Thereby realized section of jurisdiction ring at the tension side fluting, under the outer load effect correctly all joints of simulative tube loop open effect, the stress that elimination should not have is concentrated, its distortion and stress is conformed to actual, and then reduce error of test data.Especially when simulation shield tunnel segment lining structure is born ultimate load generation large deformation and progressive failure, this joint processing mode makes more realistic section of jurisdiction such as the distortion of test model, stressed, destruction and unstability ring correlation properties, reduces error of test data more significantly.Thereby can provide more accurate, reliable test figure to design, construction and the maintenance in tunnel.
Upper area, lower area, left field, the right side area of above-mentioned section of jurisdiction ring are divided equally, and namely each regional radian is 90 °.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the mechanical test structure of models synoptic diagram of the utility model embodiment.Among the figure, dotted line is the separatrix in four zones of section of jurisdiction ring.
Embodiment
Embodiment
Fig. 1 illustrates, and a kind of embodiment of the present utility model is that a kind of shield tunnel segment lining mechanical test model comprises by the integrated poured groove that has simulative tube strip terminal rigidity reduction effect on section of jurisdiction ring, the section of jurisdiction ring that forms of analog material.Described section of jurisdiction ring is divided into upper area 1a, lower area 1b, left field 1c, right side area 1d; The groove 2a of the simulative tube strip terminal rigidity reduction effect of upper area 1a and lower area 1b drives in the inboard of section of jurisdiction ring, and the groove 2b of the simulative tube strip terminal rigidity of left side, right side area reduction effect drives the outside at the section of jurisdiction ring.
Upper area 1a, lower area 1b, left field 1c, the right side area 1d of the section of jurisdiction ring that this is routine divide equally, and namely each regional radian is 90 °.
Each regional particular location is: upper area 1a and lower area 1b be for along vertical axis ± 45 of section of jurisdiction ring °, and left field 1c, right side area 1d be horizontal axis ± 45 encircled along the section of jurisdiction °.
Claims (2)
1. shield tunnel segment lining mechanical test model, comprise that it is characterized in that: described section of jurisdiction ring is divided into upper area (1a), lower area (1b), left field (1c), right side area (1d) by the integrated poured groove that has simulative tube strip terminal rigidity reduction effect on section of jurisdiction ring, the section of jurisdiction ring that forms of analog material; The groove (2a) of the simulative tube strip terminal rigidity reduction effect of upper area (1a) and lower area (1b) is driveed in the inboard of section of jurisdiction ring, and the groove (2b) of the simulative tube strip terminal rigidity of left side, right side area reduction effect is driveed the outside at the section of jurisdiction ring.
2. shield tunnel segment lining mechanical test model according to claim 1, it is characterized in that: upper area (1a), lower area (1b), left field (1c), the right side area (1d) of described section of jurisdiction ring are divided equally, and namely each regional radian is 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320059555 CN203069393U (en) | 2013-02-01 | 2013-02-01 | Mechanical test model of shield tunnel segmental lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320059555 CN203069393U (en) | 2013-02-01 | 2013-02-01 | Mechanical test model of shield tunnel segmental lining |
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| Publication Number | Publication Date |
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| CN203069393U true CN203069393U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320059555 Expired - Fee Related CN203069393U (en) | 2013-02-01 | 2013-02-01 | Mechanical test model of shield tunnel segmental lining |
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| CN (1) | CN203069393U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953349A (en) * | 2014-04-24 | 2014-07-30 | 西南交通大学 | Test method for tunnel model with duct piece connectors with rigidity in controllable changes |
| CN108776033A (en) * | 2018-03-30 | 2018-11-09 | 西南交通大学 | A kind of lining model and production method for shield tunnel longitudinal direction model test |
| CN109655346A (en) * | 2018-11-06 | 2019-04-19 | 无锡地铁集团有限公司 | A kind of tunnel duct piece longitudinal force simulation bringing device and its method |
| CN109799327A (en) * | 2019-03-08 | 2019-05-24 | 西南交通大学 | A kind of visual shield tunnel construction detection of grouting effects experimental rig and method |
-
2013
- 2013-02-01 CN CN 201320059555 patent/CN203069393U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953349A (en) * | 2014-04-24 | 2014-07-30 | 西南交通大学 | Test method for tunnel model with duct piece connectors with rigidity in controllable changes |
| CN108776033A (en) * | 2018-03-30 | 2018-11-09 | 西南交通大学 | A kind of lining model and production method for shield tunnel longitudinal direction model test |
| CN108776033B (en) * | 2018-03-30 | 2023-09-22 | 西南交通大学 | Lining model for shield tunnel longitudinal model test and manufacturing method |
| CN109655346A (en) * | 2018-11-06 | 2019-04-19 | 无锡地铁集团有限公司 | A kind of tunnel duct piece longitudinal force simulation bringing device and its method |
| CN109655346B (en) * | 2018-11-06 | 2021-05-04 | 无锡地铁集团有限公司 | Tunnel segment longitudinal force simulation application device and method |
| CN109799327A (en) * | 2019-03-08 | 2019-05-24 | 西南交通大学 | A kind of visual shield tunnel construction detection of grouting effects experimental rig and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20160201 |