CN204101307U - A kind of even hydraulic analogue charger for tunnel structural model test - Google Patents
A kind of even hydraulic analogue charger for tunnel structural model test Download PDFInfo
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- CN204101307U CN204101307U CN201420478212.6U CN201420478212U CN204101307U CN 204101307 U CN204101307 U CN 204101307U CN 201420478212 U CN201420478212 U CN 201420478212U CN 204101307 U CN204101307 U CN 204101307U
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Abstract
The utility model discloses a kind of even hydraulic analogue charger for tunnel structural model test, this device it comprise: top board (1), base plate (10), column (12), flexible sealing strip (3), air extractor (4), high precision absolute manometer (5), tunnel structural model (9), resistance strain gage (13), in tunnel structural model (9), air pressure detect aperture (7) connects high precision absolute manometer (5), tunnel structural model (9) air pressure inside is controlled by the co-ordination of air extractor (4) and high precision absolute manometer (5).Adopt air pressure to replace the equivalent loading method of hydraulic pressure, Simulated Water can not resist the characteristic of shearing force, additional constraint can not be produced to tunnel structure distortion, truly can reflect the process that tunnel structure destroys; Can the osmosis of simulated water pressure, the fracture propagation process of simulated water pressure fracturing, and the unloading effect of the through rear hydraulic pressure in crack.
Description
Technical field
The utility model relates to tunnel structural model test unit, in particular a kind of even hydraulic analogue charger for tunnel structural model test.
Background technology
In the process of construction of Tunnel Engineering, water problem is of common occurrence, especially for high-pressure water-enriched mountain tunnel and wear river cross sea etc. submerged tunnel, it no matter is circular or the tunnel lining structure of non-circular section, separate type or multiple-arch tunnel liner structure, all subject huge water pressure, and the growing volume of traffic of China makes the size of tunnel cross-section increasing, with it all come be exactly tunnel structure stress morphology complicated all the more.Tunnel structure is under high hydraulic pressure environment, and the ratio of profile height and head height is less, and the differential water pressures at tunnel cross-section diverse location place is less, and tunnel structure affects less by differential water pressures, now can be similar to and non-homogeneous hydraulic pressure is considered as even hydraulic pressure.On the impact of tunnel structure, scientific and reasonable foundation can be provided to the design of the liner structure of circular and non-circular section and construction by simulating under high hydraulic pressure effect evenly hydraulic pressure.
At present, there is the Water hydraulic static pressure loading test method for circular cross section shield tunnel and non-circular section mountain tunnel structure, but above-mentioned two kinds of methods are all adopt the mode of some steel strand wires hoops loadings to apply water pressure, loading method for circular cross section can not ensure anchor cable and section of jurisdiction closely connected, cannot accurately apply all-round load, even if for the loading method that can realize close contact of non-circular section, also be only a kind of simple mechanic equivalent, its loading theory inherently has mistake.Current Water hydraulic static pressure loading test method weak point is:
The homogeneous state of stress that 1, cannot realize tunnel structure outside surface loads, and easily causes steel strand wires place stress raisers, makes the data of foil gauge near steel strand wires in process of the test produce difference with actual;
2, cannot consider that water can not resist the characteristic of shearing force, steel strand wires and tunnel structure closely connected after, hoop power larger to tunnel structure distortion constraint larger;
3, tunnel structure distortion can cause serious steel strand wires stress loss, causes equivalent hydraulic pressure significantly to reduce, and to maintain certain hydraulic pressure, need repeatedly to adjust every root steel strand wires stress, its operation is very loaded down with trivial details, often cannot realize in practical operation.
4, the method cannot adapt to the outer Water hydraulic static pressure loading simulation of non-circular section tunnel lining structure, because same steel strand wires upper pulling force F is constant, due to steel strand wires and tunnel structure closely connected, the change of tunnel cross-section shape can cause the angle theta between steel strand wires to change, its radial force 2Fcos provided (θ/2) also changes changing with tunnel cross-section, the less radial force that it provides of tunnel cross-section radius is larger, even water pressure cannot be applied at all, let alone up-small and down-big non-homogeneous water pressure, should be general mountain tunnel structure section is all that the radius of upper section is less than inverted arch.
Therefore, be badly in need of the even hydraulic pressure that a kind of effective loading method more meeting hydraulic pressure characteristic bears to simulate tunnel structure under high hydraulic pressure effect, the research stress characteristic of tunnel structure and destructive process, provide scientific and reasonable foundation to the design of the liner structure of circular and non-circular section and construction.
Utility model content
The purpose of this utility model is just to provide a kind of even hydraulic analogue charger for tunnel structural model test.
The utility model is for realizing its object, and institute's employing scheme is:
A kind of even hydraulic analogue charger for tunnel structural model test, it comprises: top board (1), base plate (10), column (12), flexible sealing strip (3), air extractor (4), high precision absolute manometer (5), tunnel structural model (9), resistance strain gage (13), in tunnel structural model (9), outside surface symmetrical ring is to adhering resistance strain sheets (13), the wire (11) of inside surface foil gauge (13) is welded simultaneously, the wire of outside surface foil gauge is directly drawn, be welded on the wire groupings of inside surface foil gauge and strain on case for reading data, top board (1) is provided with binding post (2), aspirating hole (6), air pressure detect aperture (7), aspirating hole (6) connects air extractor (4), air pressure detect aperture (7) connects high precision absolute manometer (5), top board (1), base plate (10), column (12) form the carrying main body of whole device, column (12) is positioned at inner the bonding with base plate (10) of tunnel structural model (9) to be fixed, base plate (10), tunnel structural model (9), top board (1) are stacked gradually, base plate (10) is closely connected with tunnel structural model (9), column (12) 2 ~ 3mm higher than tunnel structural model (9), top board (1), gap flexible sealing strip (3) between base plate (10) and tunnel structural model (9) carry out shutoff.
Described device, binding post (2) is arranged symmetrically with in the above and below of top board (1).
Described device, the geometric similarity ratio of tunnel structural model (9) is 1: 20 ~ 1: 50, and model longitudinal length is 20 ~ 30cm.
Compared with prior art, the beneficial effects of the utility model are:
1, no matter be circle or the tunnel lining structure of non-circular section, separate type or multiple-arch tunnel liner structure, the loading of even water pressure under this device can be adopted to realize high hydraulic pressure effect, the research stress characteristic of tunnel structure and destructive process, provide scientific and reasonable foundation to the design of the liner structure of circular and non-circular section and construction.
2, the classic method of hoop steel strand wires is not adopted, then adopt air pressure to replace the equivalent loading method of hydraulic pressure, more meet the characteristic of hydraulic pressure, the homogeneous state of stress that can realize tunnel structure outside surface loads, stress can not be caused to concentrate, make the data of foil gauge in process of the test more realistic; If consider the acting in conjunction of country rock and hydraulic pressure, to internal strain, but can not there is the stress loss as steel strand wires in tunnel structural model, do not need repeatedly to adjust steel strand wires stress, therefore its operation is more simple under pressure from surrounding rock effect.
3, adopt air pressure to replace the equivalent loading method of hydraulic pressure, Simulated Water can not resist the characteristic of shearing force, additional constraint can not be produced to tunnel structure distortion, truly can reflect the process that tunnel structure destroys; Can the osmosis of simulated water pressure, the fracture propagation process of simulated water pressure fracturing, and the unloading effect of the through rear hydraulic pressure in crack.
Accompanying drawing explanation
Fig. 1 is the perspective view of the utility model embodiment device.
Fig. 2 be the utility model embodiment device face structural representation.
Fig. 3 is the A-A drawing in side sectional elevation of Fig. 1.
Fig. 4 is the B-B vertical section figure of Fig. 1.
Fig. 5 is the schematic diagram of column and base plate.
Fig. 6 is model back panel wiring schematic diagram.
Fig. 7 is that model inner lead draws schematic diagram.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.
Below will carry out detailed introduction of the present utility model for non-circular section tunnel, device section only need slightly be changed by other types section.Fig. 1-4 illustrates, a kind of embodiment of the present utility model is: a kind of even hydraulic analogue charger for tunnel structural model test, it comprises: top board 1, base plate 10, column 12, flexible sealing strip 3, air extractor 4, high precision absolute manometer 5, tunnel structural model 9, resistance strain gage 13, in tunnel structural model 9, outside surface symmetrical ring is to adhering resistance strain sheets 13, the wire 11 of inside surface foil gauge 13 is welded simultaneously, the wire of outside surface foil gauge is directly drawn, be welded on inside surface wire groupings and strain on case for reading data.
Inside surface foil gauge, outside surface foil gauge measure surfaces externally and internally strain stress respectively
in, ε
outward, under plane section assumption condition, can obtain axle power N and the moment M in this cross section, formula is as follows:
In formula 1,2, b is unit length, gets 1m; H is lining thickness, by model value; E is the elastic modulus of lining cutting.
Air extractor 4 and high precision absolute manometer 5 Collaborative Control tunnel structural model 9 internal pressure:
Top board 1, base plate 10, column 12 form the carrying main body of whole device, column 12 is positioned at inner the bonding with base plate 10 of tunnel structural model 9 to be fixed, base plate 10, tunnel structural model 9, top board 1 are stacked gradually, base plate 10 is closely connected with tunnel structural model 9, column 12 2 ~ 3mm higher than tunnel structural model 9, top board 1 is separated with model 9, and the load avoiding tunnel structural model 9 to bear being transmitted by top board 1 is also delivered to column 12 and base plate 10.Top board 1, gap flexible sealing strip 3 between base plate 10 and tunnel structural model 9 carry out shutoff, to ensure the impermeability of whole device, can follow with tunnel structural model 9 deformation simultaneously, not make impermeability impaired because of tunnel structural model 9 deformation.
Top board 1 is provided with binding post 2, aspirating hole 6, air pressure detect aperture 7.Binding post 2 is arranged symmetrically with in the above and below of top board 1, is used for the wire 11 of tunnel structural model 9 internal resistance foil gauge 13 being drawn out to tunnel structural model 9 outside; Aspirating hole 6 connects air extractor 4, and air pressure detect aperture 7 connects high precision absolute manometer 5, controls tunnel structural model 9 air pressure inside by the co-ordination of air extractor 4 and high precision absolute manometer 5.
Top board 1, base plate 10, column 12 all adopt organic glass to make, its transparency is convenient to observe whole process of the test, also good cohesiveness is had with sealing strip 3, it no matter is circular or the tunnel lining structure of non-circular section, separate type or multiple-arch tunnel liner structure, the section configuration that only need change top board 1 and base plate 10 can adopt this device to realize the loading of even water pressure.
Fig. 5-7 illustrates, utilize above-mentioned simulated water pressure charger to carry out the loading method of tunnel structural model test, concrete implementation step is:
A, test prepare: according to selected geometric similarity than making tunnel structural model 9, geometric similarity is advisable than with 1: 20 ~ 1: 50, and model longitudinal length is advisable with 20 ~ 30cm; Longitudinal length according to the tunnel structural model 9 determined produces column 12, and column 12 length should than tunnel model 9 longitudinal length length 2 ~ 3mm, and the diameter of column 12 and quantity should be determined according to actual tunnel model 9 size; According to cross dimensions processing top board 1 and the base plate 10 of tunnel structural model 9, top board 1 is identical with the section of tunnel structural model 9 with the cross dimensions of base plate 10; At the inside and outside surperficial symmetrical ring of tunnel structural model 9 to adhering resistance strain sheets 13, the wire 11 of inside surface foil gauge 13 is welded simultaneously.
B, even hydraulic analogue charger is installed: be pasted onto on base plate 10 by column 12 symmetry; Tunnel structural model 9 is placed on base plate 10, with sealing strip 3, base plate 10 and the gap of tunnel structural model 9 is carried out shutoff; The other end of the wire 11 of tunnel structural model internal strain sheet 13 is welded with the binding post 2 on top board 1 lower surface; Top board 1 is placed on column 12, with sealing strip 3, top board 1 and the gap of tunnel structural model 9 is carried out shutoff, wire 11 is welded on the binding post 2 of top board 1 upper surface simultaneously.
C, instrument connect debugging: the wire 11 and other test components and parts that are drawn out to tunnel structural model 9 outside are connected with computing machine; With sebific duct 8, aspirating hole 6 is connected with air extractor 4; Air pressure detect aperture 7 is connected with high precision absolute manometer 5 by sebific duct.Test out local atmospheric pressure P in advance
0suitable gas is extracted out with air extractor 4, the data variation of observing high precision absolute manometer 5 detects the impermeability of whole device, until the data maintenance of barometer display is stablized constant, pulls out air extractor 4 and makes tunnel structural model 9 inside return to local atmospheric pressure P
0.
D, test: according to the geometric similarity ratio determined and target water force value, calculate the required hydraulic pressure force value △ P loaded of model test, utilize air extractor 4 and high precision absolute manometer 5 that the air pressure P of tunnel structural model 9 inside is adjusted to P
0-△ P; By the data of computer acquisition surfaces externally and internally resistance strain gage 13, conventionally carry out data processing.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to the utility model claims.
Claims (3)
1. the even hydraulic analogue charger for tunnel structural model test, it is characterized in that, it comprises: top board (1), base plate (10), column (12), flexible sealing strip (3), air extractor (4), high precision absolute manometer (5), tunnel structural model (9), resistance strain gage (13), in tunnel structural model (9), outside surface symmetrical ring is to adhering resistance strain sheets (13), the wire (11) of inside surface foil gauge (13) is welded simultaneously, the wire of outside surface foil gauge is directly drawn, be welded on the wire groupings of inside surface foil gauge and strain on case for reading data, top board (1) is provided with binding post (2), aspirating hole (6), air pressure detect aperture (7), aspirating hole (6) connects air extractor (4), air pressure detect aperture (7) connects high precision absolute manometer (5), top board (1), base plate (10), column (12) form the carrying main body of whole device, column (12) is positioned at inner the bonding with base plate (10) of tunnel structural model (9) to be fixed, base plate (10), tunnel structural model (9), top board (1) are stacked gradually, base plate (10) is closely connected with tunnel structural model (9), column (12) 2 ~ 3mm higher than tunnel structural model (9), top board (1), gap flexible sealing strip (3) between base plate (10) and tunnel structural model (9) carry out shutoff.
2. device according to claim 1, is characterized in that, binding post (2) is arranged symmetrically with in the above and below of top board (1).
3. device according to claim 1, is characterized in that, the geometric similarity ratio of tunnel structural model (9) is 1: 20 ~ 1: 50, and model longitudinal length is 20 ~ 30cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420478212.6U CN204101307U (en) | 2014-08-25 | 2014-08-25 | A kind of even hydraulic analogue charger for tunnel structural model test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420478212.6U CN204101307U (en) | 2014-08-25 | 2014-08-25 | A kind of even hydraulic analogue charger for tunnel structural model test |
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| Publication Number | Publication Date |
|---|---|
| CN204101307U true CN204101307U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420478212.6U Withdrawn - After Issue CN204101307U (en) | 2014-08-25 | 2014-08-25 | A kind of even hydraulic analogue charger for tunnel structural model test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181002B (en) * | 2014-08-25 | 2016-09-28 | 西南交通大学 | A kind of uniform hydraulic analogue charger for tunnel structural model test and method |
| CN108414726A (en) * | 2017-10-11 | 2018-08-17 | 同济大学 | A kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner |
| CN109616004A (en) * | 2018-12-28 | 2019-04-12 | 中交上海三航科学研究院有限公司 | Submerged tunnel structural model and preparation method thereof and test method |
-
2014
- 2014-08-25 CN CN201420478212.6U patent/CN204101307U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181002B (en) * | 2014-08-25 | 2016-09-28 | 西南交通大学 | A kind of uniform hydraulic analogue charger for tunnel structural model test and method |
| CN108414726A (en) * | 2017-10-11 | 2018-08-17 | 同济大学 | A kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner |
| CN109616004A (en) * | 2018-12-28 | 2019-04-12 | 中交上海三航科学研究院有限公司 | Submerged tunnel structural model and preparation method thereof and test method |
| CN109616004B (en) * | 2018-12-28 | 2024-04-05 | 中交上海三航科学研究院有限公司 | Underwater tunnel structure model, manufacturing method and testing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150114 Effective date of abandoning: 20160928 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |