CN208297257U - A kind of water-conveyance tunnel experimental rig - Google Patents
A kind of water-conveyance tunnel experimental rig Download PDFInfo
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- CN208297257U CN208297257U CN201820582997.XU CN201820582997U CN208297257U CN 208297257 U CN208297257 U CN 208297257U CN 201820582997 U CN201820582997 U CN 201820582997U CN 208297257 U CN208297257 U CN 208297257U
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Abstract
The utility model discloses a kind of water-conveyance tunnel experimental rigs, including inner supporting device and pressure pump, the inner supporting device is integrally cylindrical, it is characterized by: the experimental rig includes several strip air bag monomers, each air bag monomer is individually equipped with valve and air gauge, and be connected by gas-distributing pipe road with pressure pump, air bag monomer is uniformly covered on the outside of the inner supporting device.The utility model can be in the case where cooperating existing water-conveyance tunnel stress and DEFORMATION MONITORING SYSTEM, determine deformation characteristic and mechanical response of the water-conveyance tunnel during water-filling operation, there is provided science reliable experimental basis for the structure design and construction of water-conveyance tunnel, it is ensured that its safety and durability in the stage of military service.
Description
Technical field
The utility model belongs to technical field of civil engineering, and in particular to a kind of water-conveyance tunnel experimental rig.
Background technique
Country builds water delivery engineering, such as project of South-to-North water diversion energetically in recent years.Weight of the water-conveyance tunnel as water delivery engineering
Component part is wanted, traffic tunnel is different from, outside receiving while high water and soil load action, still suffers from internal high hydraulic pressure
Power.High hydraulic pressure can make tunnel expand deformation inside water-conveyance tunnel, so that liner structure is in tension state；When interior
Water pressure reaches a certain level, will be so that unstable failure even occurs for water-conveyance tunnel structure crack.Therefore, to probe into water-conveyance tunnel
Deformation characteristic and mechanical response in height under hydraulic pressure effect, it is ensured that its safety and durability in the stage of military service needs to carry out
Water-conveyance tunnel internal water pressure in-situ test.
The simulation of hydraulic pressure in water-conveyance tunnel, there are mainly two types of for traditional scheme: one is along tunnel lining inner surface ring
Several force transmission shafts are arranged to uniform intervals, then on each cushion block with the uniform multistage loadings of jack, are simulated with this
The internal water pressure of tunnel.This method is simple and convenient, but the disadvantage is that: (1) multiple jack be difficult to accurate positioning and it is each very heavy
The jacking force on top is difficult to keep unanimously, and slightly it is uneven to will result in load for deviation；(2) jack power is passed by force transmission shaft
Onto tunnel lining, it be easy to cause stress to concentrate that lining cutting is made localized crush occur, does not meet lining cutting actual forced status.Separately
A kind of method is to fill the water pressurization directly in tunnel at the construction field (site).This method can reproduce tunnel under water-filling state completely
Stress, the disadvantage is that: (1) be difficult to ensure the leakproofness of entire test section under high pressure, if sealing easy hair not in place
Raw percolating water, is unable to reach specified pressure；(2) test water amount is huge, and conveying, sustainable supply and corresponding auxiliary facility all will
Increase considerably test difficulty and cost.
For this purpose, there has been proposed two kinds of water-conveyance tunnel internal water pressure modeling schemes:
Guo Rui et al. (a kind of Sichuan interior Water hydraulic static pressure loading device [P] for water-conveyance tunnel structural model test:
CN107121342A, 2017-09-01.) propose testing program in, using outer rubber wall, inside stainless steel wall and up and down
The steel flange ring at both ends constitutes the cylindric air bag of entirety of continuous sealing.By in being simulated to cylindric air bag aerating
Hydraulic pressure, and apply in water-conveyance tunnel model test.This method is simple for production, but has the disadvantage that (1) existing rubber is spelled
Connecing technique keeps its size severely limited, is simply possible to use in the model test of jacked piles with small section, it is difficult to be applied to tunnel of large section
Prototype test；(2) globality of outside rubber wall is required it is high, it is whole if careless slightly during test scratch rubber wall
A device cannot work.
Wang it is small just et al. (simulation tunnel internal water pressure experimental rig and the Beijing method [P]: CN106353120A,
2017-01-25.) in the testing program proposed, simulation tunnel is collectively constituted using load loading mechanism, monitoring system, counter-force mechanism
The experimental rig of hole internal water pressure.Wherein load loading mechanism (is welded by sheet metal flat by multiple flexible containers
Shape hollow capsules) it is connected two-by-two by pipeline, then fluid (water or cement slurry) is poured into each flexible container, utilize liquid pressure
The radial displacement that power generates applies pressure to lining cutting layer.There are still following deficiencies for this method: (1) in the loading system of the invention
Flexible container be by pipeline two-by-two be connected, this makes connecting interface excessive, and at present water-conveyance tunnel reality in hydraulic pressure
Often as high as 2.0MPa or more, in the case where meeting true force-bearing situation, between the tensile property of flexible container and two flexible containers
The reliability of connecting interface is not easy to guarantee；(2) counter-force mechanism of the invention forms for plain concrete is cast-in-place, this process needs to prop up
The cumbersome process such as mould, maintenance, and for big cross section prototype tunnel, cast-in-place counter-force mechanism volume is necessarily excessive, so that entirely
Device is excessively heavy, and installation and removal are inconvenient；(3) to meet longitudinal boundary condition, the length of water-conveyance tunnel is answered in ordinary test
This is 5 ~ 6 times of diameter, so that the quantity of the flexible container of the invention increases, and the sealing joint between container is more difficult to ensure
Card, so that entire experimental rig exploitativeness is not strong.
Utility model content
In view of the deficiencies of the prior art, the purpose of this utility model is to provide a kind of water-conveyance tunnel experimental rig, the dresses
Set the in-situ test that can be used for water-conveyance tunnel, it can also be used to model test indoors.The device can be existing defeated in cooperation
Under water tunnel stress and DEFORMATION MONITORING SYSTEM, determines deformation characteristic and mechanical response of the water-conveyance tunnel during water-filling operation, be
The structure of water-conveyance tunnel designs and construction provides science reliable experimental basis, it is ensured that its stage of military service safety with it is durable
Property.
To achieve the above object, the utility model uses following technical scheme:
A kind of water-conveyance tunnel experimental rig, including inner supporting device and pressure pump, the inner supporting device are integrally in cylinder
Shape, it is characterised in that: the experimental rig includes several strip air bag monomers, each air bag monomer be individually equipped with valve and
Air gauge, and be connected by gas-distributing pipe road with pressure pump, air bag monomer is uniformly covered on the outside of the inner supporting device.
Further, in order to increase the degree of automation of experimental rig, the experimental rig further includes automatic control module,
Atmospheric pressure value can be real-time transmitted to automatic control module by all air gauges, and automatic control module is according to default test pressure value
The ON/OFF for opening/stopping with respective valves of pressure pump is controlled with barometric atmospheric pressure value.
Further, in order to make air bag monomer have enough intensity, the air bag monomer using multilayer rubber overlap and
At.The body cross-section of air bag monomer can be round or fan annular, and it is high that fan annular is more advantageous to the uniform water-conveyance tunnel of simulation
Interior hydraulic pressure.
Further, the inner supporting device includes that steel bushing, circumferential direction are put more energy into floor and inner support steelframe.The steel bushing is whole
Body is that steel plate rolls the circle tube member being welded, and the uniformly distributed circumferential direction equidistantly welded of inner surface is put more energy into floor.The inner support
Steelframe is formed by several fashioned iron cross welds, the inner support steelframe along steel bushing longitudinal direction equidistant placement, and with corresponding position
Per pass circumferential direction put more energy into floor welding or be bolted.
Further, the inner supporting device can also be composed of several elongated members, if cross section is straight
The elongated member of angle sector.
The method tested based on above-mentioned water-conveyance tunnel experimental rig, comprising the following steps:
S1, before this experimental rig is installed, according to set tunnel stress and deformation monitoring scheme, determine monitoring index
(such as concrete surface strain, diameter convergent deformation amount), installs pressure gauge etc. in water-conveyance tunnel lining cutting inner surface, lays
Sensor, and debugged data collection system；
S2, the steel bushing to be matched according to the size of practical water-conveyance tunnel, preparation with tunnel section, in steel bushing tube inner surface
The uniformly distributed circumferential direction equidistantly welded is put more energy into floor.Per pass circumferential direction is put more energy into floor, and welding or the corresponding installation of bolted mode are passed through
One Pin inner support steelframe, so that the entirety of steel bushing, circumferential put more energy into floor and inner support steelframe formation resistance air pressure counter-force；
S3, steel bushing is positioned using Simple support, meets the centering requirement of inner supporting device and tunnel section；Simultaneously in steel
Position-limited rack is arranged in sleeve both ends, it is ensured that the changing of the relative positions does not occur along longitudinal direction for inner supporting device during test；
S4, between water-conveyance tunnel lining cutting and steel bushing, by up and down, symmetrical principle lay air bag monomer；Installation
The separate valve and air gauge of each air bag monomer；All air bag monomers are connected with pressure pump by gas-distributing pipe road；Pass through
Pressure pump, valve and air gauge are connect by circuit line with automatic control equipment；
S5, it is grouped two-by-two by the difference of absolute altitude locating for air bag, its pressure magnitude of each pair of air bag monomer independent control and every grade
Pressure increment, to simulate interior hydraulic pressure gradient difference caused by absolute altitude difference；It sets certain target pressure value, starts pressure pump, to each
Air bag monomer gas transmission pressurization；During test, boosted step by step to all air bag monomers to realize the simulation to hydraulic pressure in height, pressurization
Rate, voltage stabling control are determined according to specific test requirements document；
Pressure gauge reading is observed in S6, pressure process, records water-conveyance tunnel lining cutting inner surface pressure；Acquire water-conveyance tunnel lining
The data such as stress, the deformation of block；When certain monitoring indexes reach predetermined value, valve is closed, and terminates pressurization；
S7, valve opening carry out smooth exhaust release by pressure pump, and release overall process continues to keep serving as a contrast water-conveyance tunnel
The acquisition of the data such as stress, the deformation of block；Rate of pressure reduction is unloaded to be determined according to specific test requirements document；
It is repeated after S8, unloading plus unloading process 1 ~ 2 is taken turns, simulated and fill discharge cycle operating condition during tunnel is on active service, examine
Examine water-conveyance tunnel liner structure durability；
S9, disassembly gas-distributing pipe road, remove each air bag monomer, inner support steelframe, steel bushing and automatic control equipment etc., tie
Beam test.
The beneficial effects of the utility model have:
(1) the water-conveyance tunnel experimental rig of the utility model can be most by the cooperation of air bag monomer and inner supporting device
Reproduce deformation and mechanical response of the water-conveyance tunnel in height under hydraulic pressure to big degree.The utility model can be used for survey in situ
Examination, by into each air bag monomer gas transmission pressurize so that air bag expands, transfer the pressure to the water delivery tunnel being close to therewith
In the lining cutting of hole, can guarantee air pressure No leakage, uniformly, stablize, be safe and reliable, avoid at the construction field (site) that directly water filling is tested
Inconveniences and the defects such as difficulty of construction is big for bring, process is difficult to control, leakage, leakproofness are difficult to ensure.
(2) in the experimental rig of the utility model, well-distributed pressure is transmitted in water-conveyance tunnel lining cutting by air bag, is avoided
Using hydraulic pressure in jack power simulation tunnel height in traditional scheme, thus the case where causing tunnel stress concentration to be crushed.
(3) in the experimental rig of the utility model, air bag monomer is that multilayer rubber overlapping is made, and can be not easy guaranteeing device
It scratches/punctures, under the premise of good airproof performance, load transfer are uniform, realize the simulation of 2.0MPa or more high pressure；And prior art
In, such as " experimental rig of simulation tunnel internal water pressure and the Beijing method [P]: CN106353120A, 2017-01-25. " are because adding
The reasons such as loading system connector is excessive, poor air-tightness, the strength of materials are difficult to ensure, it is difficult to bear the high pressure of 2.0MPa or more.
(4) the utility model provides counter-force, manufacture craft letter as inner supporting device using " steel bushing+inner support steelframe "
Single, device is integrally light, is easy to transport, lifting is implemented and safe and reliable；And in prior art, as " simulated water in tunnel
Beijing experimental rig and method [P] of pressure: CN106353120A, 2017-01-25. " using cast-in-place plain concrete conduct
Counter-force mechanism, formwork support process, the curing condition etc. of annular concrete are required it is excessively high so that the device is excessively heavy, superfluous
Remaining, complicated for operation, exploitativeness is poor, and can only be disposable.
(5) in the utility model, the quantity of air bag monomer can flexible transformation, the length of each fashioned iron can also in inner support steelframe
Flexible adjustment, therefore can be applied to the prototype or model tunnel structure of different section shape and size；And air bag monomer can be multiple
Recycling.
Detailed description of the invention
Fig. 1 is the overall structure vertical section schematic diagram of the utility model experimental rig；
Fig. 2 is A-A diagrammatic cross-section in embodiment 1；
Fig. 3 is A-A diagrammatic cross-section in embodiment 2；
Fig. 4 is strip right angle fan component schematic diagram.
Wherein, 1- water-conveyance tunnel lining cutting, 2- air bag monomer, 3- inner supporting device, 31- steel bushing, 32- circumferential direction ribbed stiffener
Plate, 33- inner support steelframe, 34- elongated member, 6- gas-distributing pipe road, 7- valve, 8- air gauge, 9- pressure pump, 10- are automatically controlled
Module.
Specific embodiment
The purpose of this utility model is described in further detail in the following with reference to the drawings and specific embodiments, embodiment is not
It can repeat one by one herein, but therefore the embodiments of the present invention is not limited to the following examples.
Embodiment 1
As shown in Figs. 1-2, a kind of specific embodiment of the utility model is a kind of water-conveyance tunnel experimental rig, including
18 air bag monomers, 2, pressure pumps 9, gas-distributing pipe road 6, valve 7, air gauge 8, automatic control module 10 and inner support dress
Set 3；18 air bag monomers 2 are mutually indepedent but contact with each other, and circumferential direction is close to be arranged in 1 inner surface of water-conveyance tunnel lining cutting, Mei Geqi
Capsule monomer 2 is individually equipped with valve 7 and air gauge 8, and is connected by gas-distributing pipe road 6 with pressure pump 9, the inner supporting device 3 and
Uniformly it is covered with air bag monomer 2 between water-conveyance tunnel lining cutting 1.
Inner supporting device 3 includes that steel bushing 31, circumferential direction are put more energy into floor 32 and inner support steelframe 33；Steel bushing 31 is placed in water delivery tunnel
Inside hole lining cutting 1,31 outside of steel bushing is at regular intervals with 1 inner surface of water-conveyance tunnel lining cutting, in steel bushing 31 and water-conveyance tunnel
Uniformly it is covered with 18 air bag monomers 2 between lining cutting 1.Inner support steelframe 33 is placed in inside steel bushing 31, and the two is affixed whole to guarantee
Rigidity.
The water-conveyance tunnel lining cutting 1 is the shield single shell lining structure of outer diameter 6000mm, internal diameter 5400mm.To meet test
Required path length ratio, tunnel long 36m along longitudinal direction.
The air bag monomer 2 is formed by stacking using special multilayer rubber, and length 36m, diameter 1m are uniformly covered in steel bushing
Between 31 and water-conveyance tunnel lining cutting 1.
The pressure pump 9 can be according to the pressure value automatic start-stop of setting, while having the pressurization of conveying gas and exhaust release
Two functions；The valve 7 can be automatically turned on and be closed according to the variation of air pressure；The air gauge 8 is digital air gauge, can be in real time
Reflect the variation of air pressure；The pressure pump 9, valve 7, air gauge 8 are connected by circuit line with automatic control equipment 10.
The steel bushing 31 is overall length 36m, and the cylinder of internal diameter 1700mm, wall thickness 30mm is divided into 6 sections, every section 6m；Its
In, every section cylinder is rolled that welding is assembled, and last each section barrel soldering is at whole by four blocks of strip right angle fan Q345C steel plates
Body；The uniformly distributed Q345C circumferential direction equidistantly welded in 31 surface of steel bushing is put more energy into floor 32, to enhance 31 overall stiffness of steel bushing.Wherein,
Circumferential direction is put more energy into 32 ring of floor high 200mm, thickness 30mm, is uniformly distributed along tunnel longitudinal pitch 1m.
The inner support steelframe 33 by eight fashioned iron 45 ° of the interval 20b cross weld is circlewise whole, and with corresponding position
Per pass circumferential direction put more energy into floor welding or be bolted.
The control method of the water-conveyance tunnel experimental rig of the present embodiment, comprising the following steps:
S1, before this experimental rig is installed, according to set tunnel stress and deformation monitoring scheme, determine monitoring index
(such as concrete surface strain, diameter convergent deformation amount), installs pressure gauge etc. in water-conveyance tunnel lining cutting inner surface, lays
Sensor, and debugged data collection system；
S2, standby steel bushing 31 is controlled in tunnel inner part, welds one of circumferential direction at interval of 1m on its surface and puts more energy into floor 32,
To enhance 31 overall stiffness of steel bushing.Per pass circumferential direction is put more energy into floor 32, and welding or the corresponding installation one of bolted mode are passed through
Pin inner support steelframe 33, so that the entirety of steel bushing 31, circumferential put more energy into floor 32 and the formation resistance air pressure counter-force of inner support steelframe 33；
S3, steel bushing 31 is positioned using Simple support, meets the centering requirement of inner supporting device 3 Yu tunnel section；Simultaneously
Position-limited rack is set at 31 both ends of steel bushing, it is ensured that the changing of the relative positions does not occur along longitudinal direction for inner supporting device 3 during test；
S4, between water-conveyance tunnel lining cutting 1 and steel bushing 31, by up and down, symmetrical principle lay air bag monomer 2；
The separate valve 7 and air gauge 8 of each air bag monomer 2 are installed；By gas-distributing pipe road 6 by all air bag monomers 2 and 9 phase of pressure pump
Connection；Pressure pump 9, valve 7 and air gauge 8 are connect with automatic control equipment 10 by circuit line；
S5, it is grouped two-by-two by the difference of absolute altitude locating for air bag monomer 2, its pressure magnitude of each pair of 2 independent control of air bag monomer
And every stage pressure increment, to simulate interior hydraulic pressure gradient difference caused by absolute altitude difference；It is 1.0Mpa, starting that hydraulic pressure in target, which is arranged,
Pressure pump 9 pressurizes to each 2 gas transmission of air bag monomer；Internal pressure load gives air bag monomer 2 to pressurize step by step by every grade of 0.05MPa increment, adds
Speed is pressed to be not more than 0.05MPa/min, carry out pressure stabilizing is automatically closed in the every increase 0.05Mpa late gate of internal pressure, and 30min late gate is certainly
Dynamic unlatching continues to pressurize；
Pressure gauge reading is observed in S6, pressure process, records 1 inner surface pressure of water-conveyance tunnel lining cutting；Acquire water-conveyance tunnel
The data such as stress, the deformation of lining cutting 1 reach the connector of 2mm or water-conveyance tunnel lining cutting 1 to tunnel pipe-plate lining joint stretching value
Bolt stress reaches 300MPa, terminates pressurization；
S7, each valve 7 is opened, smooth exhaust release is carried out by pressure pump 9, release overall process continues to keep to water delivery
The acquisition of the data such as stress, the deformation of tunnel lining 1；It unloads rate of pressure reduction unloading decompression rate and is not more than 0.05MPa/min；
It is repeated after S8, unloading plus unloading process 1 ~ 2 is taken turns, simulated and fill discharge cycle operating condition during tunnel is on active service, examine
Examine water-conveyance tunnel liner structure durability.
S9, disassembly gas-distributing pipe road 6 remove each air bag monomer 2, inner support steelframe 33, steel bushing 31 and automatic control and set
Standby 10 etc., terminate test.
Embodiment 2
As shown in figure 3, compared with Example 1, the present embodiment is the difference is that the body cross-section that air bag monomer 2 is
It is annular for fan, so that water-conveyance tunnel lining cutting 1 is more uniformly stressed, so that the internal water pressure of simulation be made more to meet practical feelings
Condition.
Embodiment 3
As shown in figure 4, compared with Example 1, the present embodiment the difference is that the present embodiment inner supporting device 3 by
Cross section is that the elongated member 34 of right angle fan is composed, consequently facilitating the resettlement of entire experimental rig.By four right angles
Fan-shaped elongated member 34 may make up a cylindrical supporting device, constitute 36m inner supporting device then need it is 24 long
Degree is the elongated member 34 of the right angle fan of 6m.Certainly, the length of elongated member 34 may be 4m or other sizes.
The above, only the utility model patent preferred embodiment, but the protection scope of the utility model patent is simultaneously
It is not limited to this.Anyone skilled in the art is practical according to this in the range disclosed in the utility model patent
The technical solution of new patent, it is possible to understand that in the case where not departing from the principles of the present invention and spirit to these embodiments
A variety of change, modification, replacement and modification are carried out, the protection scope of the utility model patent is belonged to.
Claims (10)
1. a kind of water-conveyance tunnel experimental rig, including inner supporting device (3) and pressure pump (9), the inner supporting device (3) is whole
It is cylindrical, it is characterised in that: the experimental rig includes several strip air bag monomers (2), and each air bag monomer (2) is single
It is solely equipped with valve (7) and air gauge (8), and is connected by gas-distributing pipe road (6) with pressure pump (9), the inner supporting device (3) is outside
Side is uniformly covered with air bag monomer (2).
2. water-conveyance tunnel experimental rig according to claim 1, it is characterised in that further include automatic control module (10), institute
There is air gauge (8) atmospheric pressure value can be real-time transmitted to automatic control module (10), automatic control module (10) is according to default
The atmospheric pressure value of test pressure value and air gauge (8) controls the ON/OFF for opening/stopping with respective valves (7) of pressure pump (9).
3. water-conveyance tunnel experimental rig according to claim 1 or 2, it is characterised in that: the air bag monomer (2) is using more
Layer rubber-overlapping seismic forms.
4. water-conveyance tunnel experimental rig according to claim 3, it is characterised in that: the body cross-section of air bag monomer (2)
For circle.
5. water-conveyance tunnel experimental rig according to claim 3, it is characterised in that: the body cross-section of air bag monomer (2)
For fan annular.
6. water-conveyance tunnel experimental rig according to claim 1 or 2, it is characterised in that: the inner supporting device (3) includes
Steel bushing (31), circumferential direction are put more energy into floor (32) and inner support steelframe (33).
7. water-conveyance tunnel experimental rig according to claim 6, it is characterised in that: the steel bushing (31) generally steel plate
The circle tube member being welded is rolled, the uniformly distributed circumferential direction equidistantly welded of inner surface puts more energy into floor (32).
8. water-conveyance tunnel experimental rig according to claim 6, it is characterised in that: the inner support steelframe (33) is by several
Fashioned iron cross weld forms, and the inner support steelframe (33) is along the longitudinal equidistant placement of steel bushing (31), and the per pass with corresponding position
Circumferential direction put more energy into floor (32) welding or be bolted.
9. water-conveyance tunnel experimental rig according to claim 1 or 2, it is characterised in that: the inner supporting device (3) if by
A dry elongated member (34) is composed.
10. water-conveyance tunnel experimental rig according to claim 9, it is characterised in that: the cross of the elongated member (34)
Section is right angle fan.
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| CN201820582997.XU CN208297257U (en) | 2018-04-24 | 2018-04-24 | A kind of water-conveyance tunnel experimental rig |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414363A (en) * | 2018-04-24 | 2018-08-17 | 华南理工大学 | A kind of experimental rig for simulating hydraulic pressure in water-conveyance tunnel height |
| CN109765098A (en) * | 2019-01-15 | 2019-05-17 | 哈尔滨经纬复合新材料工程有限公司 | A kind of flexible high pressure utricule system application of uniform stress |
| CN112523787A (en) * | 2020-11-04 | 2021-03-19 | 华南理工大学 | Mobile shield tunnel temporary reinforcing platform |
-
2018
- 2018-04-24 CN CN201820582997.XU patent/CN208297257U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414363A (en) * | 2018-04-24 | 2018-08-17 | 华南理工大学 | A kind of experimental rig for simulating hydraulic pressure in water-conveyance tunnel height |
| CN109765098A (en) * | 2019-01-15 | 2019-05-17 | 哈尔滨经纬复合新材料工程有限公司 | A kind of flexible high pressure utricule system application of uniform stress |
| CN112523787A (en) * | 2020-11-04 | 2021-03-19 | 华南理工大学 | Mobile shield tunnel temporary reinforcing platform |
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