CN104655441A - Tunnel model test rack - Google Patents
Tunnel model test rack Download PDFInfo
- Publication number
- CN104655441A CN104655441A CN201510052099.4A CN201510052099A CN104655441A CN 104655441 A CN104655441 A CN 104655441A CN 201510052099 A CN201510052099 A CN 201510052099A CN 104655441 A CN104655441 A CN 104655441A
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- pressurization
- tunnel model
- support
- tunnel
- pressurized cylinder
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- 238000012360 testing method Methods 0.000 title claims abstract description 55
- 239000000523 sample Substances 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 16
- 210000004907 gland Anatomy 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 13
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 13
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 13
- 230000003319 supportive effect Effects 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 9
- 230000008878 coupling Effects 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 230000006378 damage Effects 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 description 15
- 238000005260 corrosion Methods 0.000 description 15
- 239000000243 solution Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 125000004122 cyclic group Chemical group 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention provides a tunnel model test rack. The tunnel model test rack comprises a rack main body, a pressurizing part and a tunnel model, wherein the pressurizing part is placed in the rack main body; the tunnel model is fixed in the inner chamber of the pressurizing part through a model supporting unit; a medium pipeline is arranged on the side wall of the pressurizing part. According to the tunnel model test rack, gas/liquid pressure in a closed space is utilized to load the tunnel model, and the pressurizing gas/liquid can be exchanged to simulate the coupling function on damage of a tunnel lining structure in the confining pressure and corrosive environments of a tunnel.
Description
Technical field
The present invention relates to tunnels mimic technical field, be specifically related to a kind of tunnel model test stand.
Background technology
Current tunnel model test stand, by equivalent material simulating tunnel lining structure and country rock, loads the destructive process and damage-form of observing country rock and tunnel structure by lifting jack.But current model test tunnel is usually in free from corrosion environment, therefore cannot consider the coupling that corrosive medium and confined pressure are destroyed tunnel lining structure, the test findings of gained can not consider the impact of corrosion environment on tunnel-liner material; In addition, use the mode of sandstone filler preloading and lifting jack pressurization, load mode is comparatively single, and loading procedure needs preloading filler comparatively for a long time, loading procedure is consuming time longer, and clear material process after off-test is also very loaded down with trivial details, affect the service efficiency of testing equipment to a great extent.
Summary of the invention
In view of this, the invention provides a kind of tunnel model test stand, be intended to, by the mode adopting liquid/gas body to load, study the mechanical characteristic of different section tunnel lining structure under solution corrosion and tunnel confined pressure coupling.
The technical solution used in the present invention is specially:
A kind of tunnel model test stand, comprise stand main body, pressurization part and tunnel model, described pressurization part is placed in described stand main body, and described tunnel model is fixed on the inner chamber of described pressurization part by model support unit, and the sidewall of described pressurization part is provided with medium pipeline.
In above-mentioned tunnel model test stand, described stand main body comprises pedestal, bracing frame and reaction frame, support frame as described above is placed in described pedestal, described reaction frame is placed in the top of support frame as described above, the first end of described pressurization part is placed in support frame as described above, and the second end of described pressurization part is placed in described reaction frame.
In above-mentioned tunnel model test stand, described pressurization part comprises pedestal, pressurization regulon and pressurization monitoring means, described pedestal comprises pressurized cylinder and gland bonnet, and described gland bonnet is located at the top of described pressurized cylinder, and described pressurization regulon is through described gland bonnet; The first end of described pressurization regulon is fixed on described reaction frame, the second end of described pressurization regulon and the contact internal walls of described pressurized cylinder.
In above-mentioned tunnel model test stand, described pressurization regulon comprises piston component and lifting jack, and described piston rod is connected with described lifting jack; Described piston component comprises piston rod and piston, and described stopper rod is connected with described piston; Wherein: described piston rod by piston rod cover through described gland bonnet, the periphery of described piston and the contact internal walls of described pressurized cylinder, described piston rod cover mates with the center pit of described gland bonnet and is connected; Described piston rod puts and is provided with oil fuel tube.
In above-mentioned tunnel model test stand, described pressurization monitoring means comprises measurement probe, probe lead wire and pressurization and measures lead-in wire, described probe lead wire is through described piston component, the first end of described probe lead wire stretches out piston rod, described measurement probe is located at the second end of described probe lead wire, and pressurization measures lead-in wire and is connected with lifting jack.
In above-mentioned tunnel model test stand, also comprise pressurization casing wall to support, described pressurization casing wall support package draws together ring set and Zhi Duan, and Zhi Duan described in several along the circumferential direction distributes described ring set, described ring set is buckled in the outer wall of described pressurized cylinder, and described in described Zhi Duanyu, the bracing frame of stand main body is connected.
In above-mentioned tunnel model test stand, described medium pipeline comprises fluid flow tube and gas flow tube, and described fluid flow tube and gas flow tube are located at the sidewall bottom of described pressurization part.
In above-mentioned tunnel model test stand, described model support unit comprises supportive body and detent mechanism, and described tunnel model is fixed on described pressurized cylinder by described supportive body, and described tunnel model is fixed on described supportive body by described detent mechanism.
In above-mentioned tunnel model test stand, described supportive body comprises model support and model support pole, described model support is fixed on the inwall of described pressurized cylinder, some described model support poles are distributed in described model support, and described model support pole is fixed on the bottom of described pressurized cylinder.
In above-mentioned tunnel model test stand, described detent mechanism comprises rubber plug, support register pin and fastening bolt, the two ends of described tunnel model are sealed by described rubber plug, described rubber plug is connected with described model support by fastening bolt, and described model support is positioned the inwall of described pressurized cylinder by support register pin described in several.
The beneficial effect that the present invention produces is:
To study tunnel lining structure destructive process different from traditional filler pressing Ioad mode, test-bed of the present invention is the applying mode by liquid/gas pressurization being introduced tunnel confined pressure, under carrying out solution corrosion and confined pressure coupling to tunnel model, tunnel model damage of lining is studied, specifically:
Compare to the defect of " load mode is comparatively loaded down with trivial details; need a large amount of manpowers to carry out the interpolation of filler, waste time and energy " that current tunnel model test exists, testing table of the present invention adopts the mode of liquid or gas boosting, a large amount of manpowers is not needed to carry out the interpolation of filler, time saving and energy saving;
Compare to that current tunnel model test exists " model test stand of research tunnel damage-form only considers the impact of single load on tunnel damage-form; and do not consider the aggravation effect that corrosion environment destroys tunnel " defect, test-bed of the present invention considers confined pressure and the destruction of corrosion to tunnel simultaneously, can show that tunnel confined pressure and corrosion environment affect the coupling that tunnel lining structure destroys.
Compare to the defect of " the alternation of wetting and drying accelerated corrosion test " that current tunnel model test exists, test-bed of the present invention can realize the at-once monitor of etchant solution concentration, and energy instantaneously changing solution, ensure the stable of solution concentration.Meanwhile, when carrying out dry cyclic test, directly discharged by solution, do hot-air by changing in pressurized cylinder, eliminate the process that test block must be carried to from liquor box drying baker in traditional stand, efficiency significantly improves.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, more completely the present invention can be understood better.Accompanying drawing described herein is used to provide a further understanding of the present invention, and embodiment and explanation thereof, for explaining the present invention, do not form inappropriate limitation of the present invention.
Fig. 1 is the structural representation of a kind of tunnel model test stand of the present invention;
Fig. 2 is the 1-1 sectional view of Fig. 1;
Fig. 3 is the 2-2 sectional view of Fig. 1;
Fig. 4 is the structural representation of the model support of a kind of tunnel model test stand of the present invention;
Fig. 5 is the 3-3 sectional view of Fig. 4;
Fig. 6 is the 4-4 sectional view of Fig. 4;
Fig. 7 is the 5-5 sectional view of Fig. 4.
In figure: 1, pedestal 2, bracing frame 3, pressurized cylinder 4, pressurization casing wall supports 5, gland bonnet 6, oil fuel tube 7, lifting jack 8, reaction frame 9, piston rod cover 10, piston rod 11, piston 12, fluid flow tube 13, rubber plug 14, tunnel model 15, model support 16, measure probe 17, probe lead wire 18, pressurized cylinder epicoele 19, pressurized cylinder cavity of resorption 20, model support pole 21, pressurization measures lead-in wire 22, fastening bolt 23, rubber suction cups 24, support register pin 25, gas flow tube.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
A kind of tunnel model test stand as shown in Figure 1, comprises stand main body, pressurization part and tunnel model 14, and pressurization part is placed in stand main body, and tunnel model 14 is fixed on the inner chamber of pressurization part by model support unit, and the sidewall of pressurization part is provided with medium pipeline.
Stand main body comprises pedestal 1, bracing frame 2 and reaction frame 8, and bracing frame 2 is placed in pedestal 1, and reaction frame 8 is placed in the top of bracing frame 2, and the first end of pressurization part is placed in bracing frame 2, and the second end of pressurization part is placed in reaction frame 8.
Pressurization part comprises pedestal, pressurization regulon and pressurization monitoring means, and pedestal comprises pressurized cylinder 3 and gland bonnet 5, and gland bonnet 5 is located at the top of pressurized cylinder 3, forms airtight pressurizing chamber.Pressurization regulon is through gland bonnet 5; The first end of pressurization regulon is fixed on reaction frame 8, pressurization the second end of regulon and the contact internal walls of pressurized cylinder 3.
Pressurization regulon comprises piston component and hydraulic jack 7, and piston rod 10 is connected with hydraulic jack 7; Piston component comprises piston rod 10 and piston 11, and piston rod 10 is connected with piston 11; Wherein: piston rod 10 overlaps 9 through gland bonnet 5 by piston rod, the periphery of piston 11 and the contact internal walls of pressurized cylinder 3, piston rod cover 9 mates with the center pit of gland bonnet 5 and is connected; Piston rod cover 9 is also provided with oil fuel tube 6, by the outer wall injection lubricating oil of oil fuel tube 6 to piston rod 10, ensures the smooth and easy operation of piston rod 10.
Pressurization monitoring means comprises measurement probe 16, probe lead wire 17 and pressurization and measures lead-in wire 21, probe lead wire 17 is through piston component, the first end of probe lead wire 17 stretches out piston rod 17, measure the second end that probe 16 is located at probe lead wire 17, when (wet circulation) corrosion test to tunnel model 14 material, a utilization probing 16 monitoring solution concentration; When carrying out dry cyclic test to tunnel model 14, the temperature of a throughput probing 16 monitoring pressure cylinder cavity of resorption 19, ensures the temperature conditions of the dry circulation in cylinder; Pressurization measures lead-in wire 21 and is connected with hydraulic jack 7, for the force value in measurement model process of the test.
Also comprise pressurization casing wall and support 4, pressurization casing wall supports 4 and comprises ring set and Zhi Duan, and several ends are along the circumferential direction uniformly distributed ring set, and ring set is buckled in the outer wall of pressurized cylinder 3, and the bracing frame 2 of Zhi Duanyu stand main body is connected.
Medium pipeline comprises fluid flow tube 12 and gas flow tube 25, fluid flow tube 12 and gas flow tube 25 are located at the sidewall bottom of pressurization part, wherein: fluid flow tube 12 for feed liquor in wet cyclic test process, fluid and in dry cyclic test time give vent to anger, gas flow tube 25 is for the air inlet when dry cyclic test.
Model support unit comprises supportive body and detent mechanism, and tunnel model 14 is fixed on pressurized cylinder 3 by supportive body, and tunnel model 14 is fixed on supportive body by detent mechanism.That is, supportive body is used for tunnel model 14 to fix, and detent mechanism is then for being positioned by the tunnel model 14 after fixing.
Supportive body comprises model support 15 and the model support pole 20 of annular, and model support 15 is fixed on the inwall of pressurized cylinder 3, and some model support poles 20 are uniformly distributed in model support 15, and model support pole 20 is fixed on the bottom of pressurized cylinder 3.
Detent mechanism comprises rubber plug 13, support register pin 24 and fastening bolt 22, the two ends of tunnel model 14 are sealed by rubber plug 13, rubber plug 13 is connected with model support 15 by fastening bolt 22, and model support 15 is fixed on the inwall of pressurized cylinder 3 by several support register pins 24.
Be loaded as example in hydraulic pressurization mode to tunnel model 14, the specific experiment process of above-mentioned tunnel model test stand is:
Before pressurization, use rubber plug 13 by tunnel model 14 shutoff, and tighten fastening bolt 22, ensure that the sealing at two ends, tunnel.(rubber plug 13 is connected with tunnel model 14 by fastening bolt 22, applies the pressure along tunnel model 14 longitudinal direction by fastening bolt 22.) after utilize the rubber suction cups 23 of support register pin 24 on model support 15 and model support pole end, tunnel model 14 is fixed and is located, is fixed in the bottom of pressure cylinder; Sealed by screwing hermetic lid 5 pairs of pressurized cylinder 3;
In pressurized cylinder 3, inject liquid by fluid flow tube 12, according to the load intending applying, the piston component be made up of piston 11 and piston rod 10 and hydraulic jack 7 push up to relevant position by the pressure produced by liquid, close fluid flow tube 12 afterwards; And inject lubricating oil by oil fuel tube 6 to piston component, guarantee the smooth and easy operation of piston rod 10, detect hydraulic jack 7 applied pressure sizes, until reach specified pressure by control line (pressurization measures lead-in wire 21).
When carrying out the corrosion test of corrosive solution to tunnel model 14 material, a utilization probing 16 monitoring solution concentration, if concentration exceedes allowable value, by adjusting the solution turnover at fluid flow tube 12 place, ensure that pressurized solution concentration is in maintenance level, after off-test, open fluid flow tube 12, the solution in cylinder is discharged.
Meanwhile, the salt solusion containing different ions can be adopted, the coupling that different ions corrosion destroys tunnel with confined pressure can be studied.
Corrosion test is generally by the corrosion of the mode accelerated material of dry, wet circulation combination, and the process of dry circulation uses air pressure to replace the mode of hydraulic pressure to load tunnel model 14, and detailed process is:
Open fluid flow tube 12, by the liquid emptying in pressurized cylinder 3; Access hot-air by gas flow tube 25, ensure that fluid flow tube 12 is opened simultaneously, as air stream outlet, ensure the circulation of air in pressurized cylinder cavity of resorption 19, the internal temperature of a throughput probing 16 monitoring pressure cylinder 3, ensure the temperature conditions of the dry circulation in cylinder.Pressurized cylinder 3 is divided into pressurized cylinder epicoele 18 and pressurized cylinder cavity of resorption 19 by piston 11, and wherein: pressurized cylinder cavity of resorption 19 cavity of resorption is pressure chamber, pressurized cylinder epicoele 18 is then the scope of activities of piston 11, for the motion of piston 11 provides space.In dry cyclic process, the flow velocity that the flow velocity of discharging by regulating the gas of fluid flow tube 12 and gas flow tube 25 hot-air flow into, ensures the pressure stability in pressurized cylinder cavity of resorption 19 in whole dry cyclic process.
After test, take out tunnel model 14, carry out performance dependence test.
Can find out, present invention achieves tunnel confined pressure and solution corrosion intercoupling to tunnel lining structure corrosion failure, and drying and watering cycle can realize in same pressurized cylinder 3, and tunnel model 14 is by being reliably fixed in liquid in the mode sealing, support and locate.
As mentioned above, embodiments of the invention are explained, obviously, as long as do not depart from fact inventive point of the present invention and effect, will be readily apparent to persons skilled in the art distortion, is also all included within protection scope of the present invention.
Claims (10)
1. a tunnel model test stand, it is characterized in that, comprise stand main body, pressurization part and tunnel model, described pressurization part is placed in described stand main body, described tunnel model is fixed on the inner chamber of described pressurization part by model support unit, and the sidewall of described pressurization part is provided with medium pipeline.
2. tunnel model test stand according to claim 1, it is characterized in that, described stand main body comprises pedestal, bracing frame and reaction frame, support frame as described above is placed in described pedestal, described reaction frame is placed in the top of support frame as described above, the first end of described pressurization part is placed in support frame as described above, and the second end of described pressurization part is placed in described reaction frame.
3. tunnel model test stand according to claim 2, it is characterized in that, described pressurization part comprises pedestal, pressurization regulon and pressurization monitoring means, described pedestal comprises pressurized cylinder and gland bonnet, described gland bonnet is located at the top of described pressurized cylinder, and described pressurization regulon is through described gland bonnet; The first end of described pressurization regulon is fixed on described reaction frame, the second end of described pressurization regulon and the contact internal walls of described pressurized cylinder.
4. tunnel model test stand according to claim 3, is characterized in that, described pressurization regulon comprises piston component and lifting jack, and described piston rod is connected with described lifting jack; Described piston component comprises piston rod and piston, and described stopper rod is connected with described piston; Wherein: described piston rod by piston rod cover through described gland bonnet, the periphery of described piston and the contact internal walls of described pressurized cylinder, described piston rod cover mates with the center pit of described gland bonnet and is connected; Described piston rod puts and is provided with oil fuel tube.
5. tunnel model test stand according to claim 3, it is characterized in that, described pressurization monitoring means comprises measurement probe, probe lead wire and pressurization and measures lead-in wire, described probe lead wire is through described piston component, the first end of described probe lead wire stretches out piston rod, described measurement probe is located at the second end of described probe lead wire, and pressurization measures lead-in wire and is connected with lifting jack.
6. tunnel model test stand according to claim 3, it is characterized in that, also comprise pressurization casing wall to support, described pressurization casing wall support package draws together ring set and Zhi Duan, Zhi Duan described in several along the circumferential direction distributes described ring set, described ring set is buckled in the outer wall of described pressurized cylinder, and described in described Zhi Duanyu, the bracing frame of stand main body is connected.
7. tunnel model test stand according to claim 1, is characterized in that, described medium pipeline comprises fluid flow tube and gas flow tube, and described fluid flow tube and gas flow tube are located at the sidewall bottom of described pressurization part.
8. tunnel model test stand according to claim 3, it is characterized in that, described model support unit comprises supportive body and detent mechanism, described tunnel model is fixed on described pressurized cylinder by described supportive body, and described tunnel model is fixed on described supportive body by described detent mechanism.
9. tunnel model test stand according to claim 8, it is characterized in that, described supportive body comprises model support and model support pole, described model support is fixed on the inwall of described pressurized cylinder, some described model support poles are distributed in described model support, and described model support pole is fixed on the bottom of described pressurized cylinder.
10. tunnel model test stand according to claim 8, it is characterized in that, described detent mechanism comprises rubber plug, support register pin and fastening bolt, the two ends of described tunnel model are sealed by described rubber plug, described rubber plug is connected with described model support by fastening bolt, and described model support is positioned the inwall of described pressurized cylinder by support register pin described in several.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510052099.4A CN104655441B (en) | 2015-01-30 | 2015-01-30 | A kind of tunnel model test stand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510052099.4A CN104655441B (en) | 2015-01-30 | 2015-01-30 | A kind of tunnel model test stand |
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| CN104655441A true CN104655441A (en) | 2015-05-27 |
| CN104655441B CN104655441B (en) | 2017-11-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101790A (en) * | 2017-05-22 | 2017-08-29 | 西南交通大学 | A kind of tunnel model experimental provision and tunnel model experimental system |
| CN108398372A (en) * | 2018-03-26 | 2018-08-14 | 上海隧道工程有限公司 | Shield duct piece corrosion resistance test device |
| CN108414362A (en) * | 2018-03-09 | 2018-08-17 | 安徽理工大学 | A kind of multipurpose model test platform |
| CN112629897A (en) * | 2020-11-16 | 2021-04-09 | 西南交通大学 | Model test system for mechanical properties of tunnel lining under action of train pneumatic load |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101790A (en) * | 2017-05-22 | 2017-08-29 | 西南交通大学 | A kind of tunnel model experimental provision and tunnel model experimental system |
| CN107101790B (en) * | 2017-05-22 | 2019-10-29 | 西南交通大学 | A kind of tunnel model experimental provision and tunnel model experimental system |
| CN108414362A (en) * | 2018-03-09 | 2018-08-17 | 安徽理工大学 | A kind of multipurpose model test platform |
| CN108414362B (en) * | 2018-03-09 | 2020-07-14 | 安徽理工大学 | Multipurpose model test platform |
| CN108398372A (en) * | 2018-03-26 | 2018-08-14 | 上海隧道工程有限公司 | Shield duct piece corrosion resistance test device |
| CN112629897A (en) * | 2020-11-16 | 2021-04-09 | 西南交通大学 | Model test system for mechanical properties of tunnel lining under action of train pneumatic load |
| CN112629897B (en) * | 2020-11-16 | 2022-11-01 | 西南交通大学 | Model test system for mechanical properties of tunnel lining under action of train pneumatic load |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104655441B (en) | 2017-11-17 |
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