CN108414726A - A kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner - Google Patents
A kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner Download PDFInfo
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- CN108414726A CN108414726A CN201810069501.3A CN201810069501A CN108414726A CN 108414726 A CN108414726 A CN 108414726A CN 201810069501 A CN201810069501 A CN 201810069501A CN 108414726 A CN108414726 A CN 108414726A
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Abstract
The present invention relates to a kind of vapour-pressure type load testing machines for cyclic annular tunnel-liner, the device is used for the load test of cyclic annular tunnel-liner test specimen, the device includes being arranged outside cyclic annular tunnel-liner test specimen and counter-force outline border compatible with cyclic annular tunnel-liner test specimen, the air bag that is arranged between counter-force outline border and cyclic annular tunnel-liner test specimen and inflation/deflation control mechanism communicated with the airbag, the inflation/deflation control mechanism is inflated air bag, is pressurizeed to the lateral surface of cyclic annular tunnel-liner test specimen by air bag.Compared with prior art, the expansion that the present invention passes through air bag, the inside of air bag is set to be in contact with cyclic annular tunnel-liner, and area load is applied to cyclic annular tunnel-liner by atmospheric pressure, it simulates tunnel structure and contacts situation with the true face of surrounding Rock And Soil, it ensure that the operating mode of domain experiment is consistent with the true force-bearing situation of tunnel structure, improve test accuracy, flexibility and safety are good.
Description
Technical field
The invention belongs to civil engineering structure experimental technique field, it is related to a kind of vapour-pressure type for cyclic annular tunnel-liner and adds
Carry experimental rig.
Background technology
In civil engineering structure experiment, the domain experiment of cyclic annular tunnel-liner is research tunnel structure (especially shield
Tunnel) stress performance one of important method.Have the reasonability of computational theory currently, domain experiment is verification, simulate country rock
Influence of the pressure to tunnel structure, the important means for probing into New type section form stress performance.In order to meet underground engineering design
Requirement, the country has carried out domain load examination for conventional minor diameter shield, large-diameter shield, anisotropic bore tunnel structure
It tests.The loading method of current such experiment, is the method using hydraulic jack group, by being set around cyclic annular tunnel-liner
It sets multiple jack and carries out multipoint excitation, carry out approximate simulation ground load.But in fact, tunnel structure and surrounding Rock And Soil connect
It touches and belongs to face contact, multiple jack can only apply point loading, can not simulate true area load form, and the domain is caused to test
Operating mode is not inconsistent with the true force-bearing situation of tunnel structure, and then leads to test result there are deviations, reduces test accuracy.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind for cyclic annular tunnel
The vapour-pressure type load testing machine of lining cutting.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner, the device are used for cyclic annular tunnel-liner test specimen
Load test, the device include that setting is outside cyclic annular tunnel-liner test specimen and compatible with cyclic annular tunnel-liner test specimen
Counter-force outline border, the air bag being arranged between counter-force outline border and cyclic annular tunnel-liner test specimen and charge and discharge gas control communicated with the airbag
Mechanism processed, the inflation/deflation control mechanism are inflated air bag, are added to the lateral surface of cyclic annular tunnel-liner test specimen by air bag
Pressure.The gas being filled in air bag can be air, or the harmless inert gas stablized.It is expanded after airbag aeration, outside counter-force
Frame provides reaction of bearing from outside for air bag, and the inside of air bag pressurizes to the lateral surface of cyclic annular tunnel-liner, provides face lotus
It carries.
The outer edge shape of cyclic annular tunnel-liner test specimen can be circle, the shape of a hoof, rectangle, round rectangle, polygon, curl
Polygon etc..
Counter-force outline border is by welding for steel structure or testing stand made of being bolted, and provides counter-force for load, and limit gas
Capsule excessive expansion outward ensures that pressure is applied on cyclic annular tunnel-liner test specimen.
Further, the shape of the counter-force outline border and the shape of cyclic annular tunnel-liner test specimen are identical and described
Counter-force outline border is arranged concentrically with cyclic annular tunnel-liner test specimen.According to the true form and size of cyclic annular tunnel-liner test specimen, setting
The counter-force outline border and air bag of respective shapes and size, to adapt to the tunnel form requirement of different cross section shape.
Further, the counter-force outline border is equipped with counter-force outline border fixed frame.By counter-force outline border fixed frame by counter-force
Outline border fixes on the ground, stability when guarantee test.According to actual needs, counter-force outline border can both be erect and be positioned over ground
On, it can also lie against on ground.
Further, the air bag is annular in shape.Cricoid air bag is monoblock type air bag, can be to cyclic annular tunnel-liner
The lateral surface of test specimen uniformly applies area load, to simulate uniform load operating mode.
Further, the air bag is equipped with multiple altogether, and partition board is equipped between adjacent two air bag.Also air bag can be arranged to
Combined type, each air bag are mutual indepedent, and are mutually separated by partition board, by adjusting the pressure size in different bladder, utilize difference
Air bag apply different pressures, to simulate the operating condition of test of non-uniform face load.
The material of the partition board is steel or organic glass as a preferred technical solution,.Partition board is fixed with counter-force outline border
Connection.
Further, air-filled pore and bleeder port are offered on the air bag, and charge valve, institute are equipped at the air-filled pore
Gas bleeder valve is equipped at the bleeder port stated.The inside of air bag is inflated by air-filled pore；It after the test, will using bleeder port
The gas of inside air bag is released.
Further, it is further opened with emergency decompression hole on the air bag, emergency decompression valve is equipped at the emergency decompression hole.
When large deformation, destruction suddenly occur in the gas leakage of generation air bag, rupture or cyclic annular tunnel-liner test specimen in experiment, for guarantee test peace
Entirely, pass through emergency decompression hole quick release gasbag pressure.
The aperture in the emergency decompression hole is more than the aperture of bleeder port as a preferred technical solution,.
Further, the inflation/deflation control mechanism includes the air compressor being connected with the inside of air bag and divides
The central control computer not being electrically connected with charge valve, gas bleeder valve, air compressor.By setting inflation pressure in central control computer
Power is automatically controlled the switch of related valve by central control computer, and the quantitative levels loaded according to experiment are inflated or pressure release, and
Compressed air is replenished in time, it is automatic to realize pressure control and pressurize.Emergency decompression valve is also electrically connected with central control computer, by middle control
Computer controls the unlatching of emergency decompression valve.Air compressor is connected by air delivering pipeline with the inside of air bag.
The device further includes pressure sensor as a preferred technical solution, which is arranged in inside air bag,
To monitor the air pressure of inside air bag.When central control computer detects the burst explosion of some air bag by pressure sensor, immediately
Start emergency decompression valve, the pressure in the other air bags of removal prevents cyclic annular tunnel-liner from occurring mobile suddenly and hits outside counter-force
Frame.
Further, the first side plate, the second side plate are equipped on the counter-force outline border side by side, the air bag is located at first
Between side plate and the second side plate.Air bag is located between the first side plate, the second side plate, counter-force outline border and cyclic annular tunnel-liner test specimen,
First side plate, the second side plate and counter-force outline border respectively limit the both sides of air bag and outside, and limitation air bag is in gas replenishment process
In expansion, apply pressure on cyclic annular tunnel-liner test specimen on the inside of air bag.
First side plate and the second side plate are transparent organic glass as a preferred technical solution, can either
The both sides of cyclic annular tunnel-liner and air bag are limited, prevent cyclic annular tunnel-liner and air bag from occurring perpendicular to loading direction
Offset and extrusion, guarantee test safety, while being convenient for observation again.
Further, which further includes subsidiary mechanism, which includes strain transducer, displacement biography
One or more in sensor or angular transducer.Subsidiary mechanism includes foil gauge and stress measurement device, lateral
Displacement measuring device.Sensor in subsidiary mechanism is arranged on cyclic annular tunnel-liner test specimen, for during the test
The physical quantitys such as strain, displacement, corner to cyclic annular tunnel-liner test specimen measure, and real-time data transmission to middle control is calculated
Machine.
It is to the process of cyclic annular tunnel-liner test specimen progress load test using the present invention：
1) counter-force outline border is installed, and counter-force outline border is fixed on ground using counter-force outline border fixed frame；
2) cyclic annular tunnel-liner test specimen is mounted in counter-force outline border, and adjusts the position of cyclic annular tunnel-liner test specimen；
3) partition board is installed in the default gap between cyclic annular tunnel-liner test specimen and counter-force outline border, air bag is installed later,
And air bag is connected into air compressor and central control computer；
4) examination inflation is carried out to air bag, after air bag has certain expansion, checks the leakproofness of air bag, ensure that air bag does not occur
Situations such as gas leakage；
5) the first side plate and the second side plate are installed；
6) according to experimental design, required DATA REASONING instrument is installed, and debug test data collection system；
7) start air compressor, air bag is inflated, according to experimental design, inflation pressure is adjusted by central control computer
Force value achievees the purpose that hierarchical loading；
8) data acquire；
9) off-test is opened bleeder port, is gradually let out except gasbag pressure, removes partition board later, removes air bag, cyclic annular tunnel
Lining cutting test specimen optionally removes counter-force outline border, terminates experiment.
Wherein, if there is the big gas leakage of air bag, rupture or cyclic annular tunnel-liner test specimen in step 7), step 8) or step 9)
When there is large deformation, the suddenly unexpected situations such as destruction, central control computer can start emergency decompression valve quick release gasbag pressure, protect
Confirmatory test safety.
Compared with prior art, the invention has the characteristics that：
1) by the expansion of air bag, the inside of air bag is made to be in contact with cyclic annular tunnel-liner, and by atmospheric pressure to ring-type
Tunnel-liner applies area load, and simulation tunnel structure contacts situation with the true face of surrounding Rock And Soil, to eliminate current jack
Load can not falseface contact defect, ensure that the domain experiment operating mode it is consistent with the true force-bearing situation of tunnel structure, raising
Test accuracy；
2) it by the way that monoblock type air bag or Combined gas-bag is arranged, realizes and the uniform of cyclic annular tunnel-liner test specimen lateral surface is added
It carries or uneven load test operating mode, flexibility is good；
3) has the function of emergency decompression, when central control computer detects the burst explosion of some air bag by pressure sensor
When, start emergency decompression valve immediately, the pressure of the other air bags of removal prevents cyclic annular tunnel-liner from occurring mobile suddenly and hits anti-
Power outline border, safety are good.
Description of the drawings
Fig. 1 is the structural schematic diagram of experimental rig in embodiment 1；
Fig. 2 is the A-A sectional views in Fig. 1；
Fig. 3 is the structural schematic diagram of experimental rig in embodiment 2；
Description of symbols in figure：
1-counter-force outline border, 2-air bags, 3-cyclic annular tunnel-liner test specimens, 4-counter-force outline border fixed frames, 5-partition boards, 6-
Air-filled pore, 7-bleeder ports, 8-emergency decompression holes, 9-central control computers, 10-air compressors, the 11-the first side plate, 12-
Second side plate.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment 1：
A kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner, the device are used for cyclic annular tunnel-liner test specimen 3
Load test, device includes setting in the outside of cyclic annular tunnel-liner test specimen 3 and compatible with cyclic annular tunnel-liner test specimen 3 anti-
Power outline border 1, the air bag 2 being arranged between counter-force outline border 1 and cyclic annular tunnel-liner test specimen 3 and the charge and discharge being connected with air bag 2
Gas control mechanism, the inflation/deflation control mechanism are inflated air bag 2, by air bag 2 to the lateral surface of cyclic annular tunnel-liner test specimen 3
It pressurizes.
As shown in Figure 1, the outer edge shape of cyclic annular tunnel-liner test specimen 3 is circle, the shape of counter-force outline border 1 and cyclic annular tunnel
The shape of road lining cutting test specimen 3 is identical, and counter-force outline border 1 is arranged concentrically with cyclic annular tunnel-liner test specimen 3.It is set on counter-force outline border 1
There is counter-force outline border fixed frame 4.Air bag 2 is equipped with 4 altogether, and partition board 5 is equipped between adjacent two air bag 2.Air-filled pore is offered on air bag 2
6 and bleeder port 7, charge valve is equipped at air-filled pore 6, and gas bleeder valve is equipped at bleeder port 7.Emergency decompression hole is further opened on air bag 2
8, emergency decompression valve is equipped at the emergency decompression hole 8.
Inflation/deflation control mechanism include the air compressor 10 being connected with the inside of air bag 2 and respectively with charge valve,
The central control computer 9 that gas bleeder valve, air compressor 10 are electrically connected.
As shown in Fig. 2, being equipped with the first side plate 11, the second side plate 12 on counter-force outline border 1 side by side, air bag 2 is located at the first side plate
11 and second between side plate 12.
The device further includes subsidiary mechanism, which is strain transducer.
It is to the process of cyclic annular tunnel-liner test specimen 3 progress load test using the device：
1) installation counter-force outline border 1, and counter-force outline border 1 is fixed on ground using counter-force outline border fixed frame 4；
2) cyclic annular tunnel-liner test specimen 3 is mounted in counter-force outline border 1, and adjusts the position of cyclic annular tunnel-liner test specimen 3；
3) partition board 5 is installed in the default gap between cyclic annular tunnel-liner test specimen 3 and counter-force outline border 1, gas is installed later
Capsule 2, and air bag 2 is connected into air compressor 10 and central control computer 9；
4) examination inflation is carried out to air bag 2, after air bag 2 has certain expansion, checks the leakproofness of air bag 2, ensures air bag 2 not
Situations such as gas leakage occurs；
5) the first side plate 11 and the second side plate 12 are installed；
6) according to experimental design, required DATA REASONING instrument is installed, and debug test data collection system；
7) start air compressor 10, air bag 2 is inflated, according to experimental design, filled by the adjustment of central control computer 9
Air pressure force value, achievees the purpose that hierarchical loading；
8) data acquire；
9) bleeder port 7 is opened in off-test, is gradually let out except 2 pressure of air bag, is removed partition board 5 later, and air bag 2, ring-type are removed
Tunnel-liner test specimen 3 optionally removes counter-force outline border 1, terminates experiment.
Wherein, if there is 2 big gas leakage of air bag, rupture or cyclic annular tunnel-liner examination in step 7), step 8) or step 9)
When large deformation, the suddenly unexpected situations such as destruction occurs in part 3, central control computer 9 can start the pressure of emergency decompression valve quick release air bag 2
Power, guarantee test safety.
Embodiment 2：
In the present embodiment, as shown in figure 3, the outer edge shape of cyclic annular tunnel-liner test specimen 3 is class rectangle, subsidiary machine
Structure includes one or more in strain transducer, displacement sensor or angular transducer, remaining is the same as embodiment 1.
Embodiment 3：
In the present embodiment, air bag 2 is equipped with 2 altogether, and subsidiary mechanism includes displacement sensor and angular transducer, remaining
With embodiment 1.
Embodiment 4：
In the present embodiment, set that there are one ring-shaped gasbag 2, subsidiaries between counter-force outline border 1 and cyclic annular tunnel-liner test specimen 3
Mechanism includes strain transducer, displacement sensor and angular transducer, remaining is the same as embodiment 1.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be the present invention's
Within protection domain.
Claims (10)
1. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner, which is used for cyclic annular tunnel-liner test specimen (3)
Load test, which is characterized in that the device include setting it is external in cyclic annular tunnel-liner test specimen (3) and with cyclic annular tunnel
The gas of the compatible counter-force outline border (1) of lining cutting test specimen (3), setting between counter-force outline border (1) and cyclic annular tunnel-liner test specimen (3)
Capsule (2) and the inflation/deflation control mechanism being connected with air bag (2), the inflation/deflation control mechanism are inflated air bag (2), by
Air bag (2) pressurizes to the lateral surface of cyclic annular tunnel-liner test specimen (3).
2. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 1, which is characterized in that
The shape of the counter-force outline border (1) the counter-force outline border (1) identical and described as the shape of cyclic annular tunnel-liner test specimen (3)
It is arranged concentrically with cyclic annular tunnel-liner test specimen (3).
3. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 1, which is characterized in that
The counter-force outline border (1) is equipped with counter-force outline border fixed frame (4).
4. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 1, which is characterized in that
The air bag (2) is annular in shape.
5. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 1, which is characterized in that
The air bag (2) altogether be equipped with it is multiple, between adjacent two air bag (2) be equipped with partition board (5).
6. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 1, which is characterized in that
Air-filled pore (6) and bleeder port (7) are offered on the air bag (2), and charge valve is equipped at the air-filled pore (6), it is described
Gas bleeder valve is equipped at bleeder port (7).
7. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 6, which is characterized in that
It is further opened with emergency decompression hole (8) on the air bag (2), emergency decompression valve is equipped at the emergency decompression hole (8).
8. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 6, which is characterized in that
The inflation/deflation control mechanism include the air compressor (10) being connected with the inside of air bag (2) and respectively with inflation
The central control computer (9) that valve, gas bleeder valve, air compressor (10) are electrically connected.
9. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 1, which is characterized in that
The first side plate (11), the second side plate (12) are equipped on the counter-force outline border (1) side by side, the air bag (2) is located at the first side
Between plate (11) and the second side plate (12).
10. a kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner according to claim 1, feature exist
In the device further includes subsidiary mechanism, which includes strain transducer, displacement sensor or angle sensor
One or more in device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710941838 | 2017-10-11 | ||
| CN2017109418384 | 2017-10-11 |
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| CN108414726A true CN108414726A (en) | 2018-08-17 |
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| CN201810069501.3A Pending CN108414726A (en) | 2017-10-11 | 2018-01-24 | A kind of vapour-pressure type load testing machine for cyclic annular tunnel-liner |
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Cited By (5)
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| CN110286078A (en) * | 2019-07-31 | 2019-09-27 | 招商局重庆交通科研设计院有限公司 | A kind of tunnel rhegma liner structure percolating water property testing system |
| CN110375704A (en) * | 2019-07-26 | 2019-10-25 | 华中科技大学 | A kind of buried round tunnel excavation country rock-lining cutting stress and deformation prediction technique |
| CN112147060A (en) * | 2020-09-18 | 2020-12-29 | 徐州新通预制构件制造有限公司 | Multi-disaster coupling experiment system and method for simulating tunnel |
| CN112429268A (en) * | 2020-11-05 | 2021-03-02 | 北京天创凯睿科技有限公司 | Aircraft electric connector contact reliability tester and detection method thereof |
| CN114002095A (en) * | 2021-08-29 | 2022-02-01 | 浙江理工大学 | Geotechnical test pressurizing device and experimental method |
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| CN112429268A (en) * | 2020-11-05 | 2021-03-02 | 北京天创凯睿科技有限公司 | Aircraft electric connector contact reliability tester and detection method thereof |
| CN112429268B (en) * | 2020-11-05 | 2021-05-25 | 北京天创凯睿科技有限公司 | Aircraft electric connector contact reliability tester and detection method thereof |
| CN114002095A (en) * | 2021-08-29 | 2022-02-01 | 浙江理工大学 | Geotechnical test pressurizing device and experimental method |
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Application publication date: 20180817 |