CN109406184A - A kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit - Google Patents
A kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit Download PDFInfo
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- CN109406184A CN109406184A CN201811442550.3A CN201811442550A CN109406184A CN 109406184 A CN109406184 A CN 109406184A CN 201811442550 A CN201811442550 A CN 201811442550A CN 109406184 A CN109406184 A CN 109406184A
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- loading device
- immersed tube
- roller bearing
- tube tunnel
- bearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit, roller bearing loading device is that transmission rod is fixed with hydraulic jack action head, and slot rolling pedestal is fixed with level-one distribution beam, and roller bearing curved surface is identical as slot rolling pedestal curved surface；Bearing loading device is that level-one distribution beam passes through bearing and fills upper and lower gap with solid half roller bearing, and bearing lower part is fixed with secondary distribution beam；Self-balancing reaction frame and hydraulic loading device provide downward power for four tripod load transfer devices.The present invention provides a kind of loading device of the immersed tube tunnel under the big operating condition of single hole fire and external loads, overcome load to transmit non-uniform defect and deficiency, can satisfy the requirement of single hole immersed tube tunnel fire resistance test；By roller bearing loading device and bearing loading device, self-balancing reaction frame, hydraulic jack, a secondary distribution beam is made to form entirety, solves the big loading device stability problem of load, the safety of guarantee test；Different fire working researchs occur for porous immersed tube tunnel engineering and design provides strong support.
Description
Technical field
The present invention relates to underground engineering structure fire test technical fields, can simulate immersed tube tunnel single hole fire model top
The loading device of external loads in plate test.
Background technique
With the exploitation of the underground space, immersed tube tunnel is widely used in crossing river and sea tunnel, due to tunnel it is buried in
Under water, space is limited and entrance is very limited, major casualty of the fire as tunnel, the operation of life and equipment to personnel
Grave danger is caused, or even influences structure safety and airtightness, causes the serious consequences such as malformation, percolating water.It learns both at home and abroad
Person gradually payes attention to immersed tube tunnel experimental research under fire, and large scale layer during similar model test also becomes Tunnel Engineering research gradually and leads
The means in domain.In the past using water and sandy soil loading device or using uniformly distributed loading device come the external lotus in simulated sea bottom tunnel
It carries, structural response during test cannot be seen well using water and sandy soil loading device when studying immersed tube tunnel fire test
It surveys；Inhomogeneous deformation can be generated during loading using uniformly distributed loading device leads to the rotation of loading device, usually adopts in the past
With on the lesser plate of load, high security is not obtained in guarantee loading device；And the similar tunnel model needs of large scale are larger
External loads, cause use uniformly distributed loading device it is excessively high, and due to the rotation of loading device make power transmitting unevenness and
Safety cannot ensure.With tunnel profession research gradually deeply to large scale tunnel model test loading device, safety and
Precision made higher requirement.
Summary of the invention
The problem of for immersed tube tunnel single hole model fire test, the present invention provide a kind of load is big, fire
Loading device in operating condition asymmetry situation overcomes load to transmit non-uniform defect and deficiency, solves the big loading device of load
Stability problem, the safety of guarantee test provide test reference for tunnel fire hazard research work from now on.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit, including self-balancing reaction frame, hydraulic loaded dress
It sets, loading device, the tripod load transfer device of two kinds of different rotation formulas；The different rotation loading devices of described two kinds wrap respectively
Include roller bearing loading device and bearing loading device；
The roller bearing loading device includes transmission rod, roller bearing and slot rolling；One end of the transmission rod and hydraulic loading device
Loading end connection, the other end is fixedly connected with roller bearing；The roller bearing is placed in slot rolling, and roller bearing curved surface and slot rolling curved surface phase
Together；The roller bearing loading device is fixed on the middle of level-one distribution beam, loading procedure by first dismountable attachment device
In by roller bearing load transfer device realize plane in rotation；
The bearing loading device includes bearing, solid half roller bearing and the first hemisphere；It is solid on the inner periphery of the bearing
Fixed solid half roller bearing, and the level-one distribution beam passes through the inner circle of bearing, and both ends are respectively at solid half roller bearing top
It supports；The excircle bottom of the bearing is fixed on secondary distribution beam middle by second dismountable attachment device, and the first half
The planar ends of sphere are fixed on secondary distribution soffit both ends；
The upper surface contact of the first hemispheroidal sphere end and tripod load transfer device, under tripod load transfer device
The upper surface of immersed tube tunnel is arranged in end face；
The hydraulic loading device is fixed on the top beam of self-balancing reaction frame；It is heavy that self-balancing reaction frame bottom beam middle line is placed on
On pipe tunnel longitudinal direction length middle line；Hydraulic loading device is acted on certainly by computer control load rate and load
It balances on reaction frame top beam and immersed tube tunnel top plate, power is transmitted on the bottom beam of immersed tube tunnel and self-balancing reaction frame by certainly flat
The column of weighing apparatus reaction frame reaches the self-balancing of reaction frame.
In a preferred embodiment: the hydraulic loading device is hydraulic jack, by upper anchor slab, pull rod and is casted anchor
Plate is fixed on the top beam of self-balancing reaction frame.
In a preferred embodiment: the tripod load transfer device includes billet, hollow round steel pipe；The hollow round steel
One end of pipe is connected to the lower surface of billet, and multiple hollow round steel pipes rotate in a circumferential direction symmetrical point along the lower surface of billet
Cloth, hollow round steel pipe are arranged its mutual angle according to required load, connect between two adjacent hollow round steel pipes
Reinforcing bar is connected to as pull rod.
In a preferred embodiment: second hemisphere is three, distribution in equilateral triangle.
In a preferred embodiment: the bottom of the hollow round steel pipe is fixed with the second hemispheroidal planar ends.
In a preferred embodiment: the upper surface of the slot rolling is alongst provided with the resigning passed through for transmission rod
Mouthful.
The method tested using above-mentioned loading device, comprising the following steps:
(1) according to the size of immersed tube tunnel test model and required load, loading device reasonable size is determined；
(2) hydraulic jack is fixed at self-balancing reaction frame top beam middle, jack action head and roller bearing power transmission
Device is reliably connected, and roller bearing load transfer device pedestal is fixed with level-one distribution beam, covers upper bearing (metal) at level-one distribution beam both ends and in fact
Half roller bearing of the heart fills upper and lower gap, and bearing bottom is fixed with secondary distribution beam, and two hemisphere are fixed in secondary distribution beam both ends bottom surface
Body；
(3) triangle load transfer device is seated among the top plate of immersed tube tunnel hole, the hemisphere with secondary distribution beam both ends bottom surface
Body contact；
(4) load requirement according to needed for simulation test is loaded.
Compared to existing loading device, the present invention is had the beneficial effect that:
As seen from the above technical solution provided by the invention, the present invention is filled by roller bearing loading device and bearing load
It sets, self-balancing reaction frame, hydraulic jack, a secondary distribution beam is made to form entirety, solve the big loading device stability of load and ask
Topic, the safety of guarantee test；
In the present invention, overcomes load in previous loading mode to transmit non-uniform defect and deficiency, it is heavy to can satisfy single hole
The requirement of pipe tunnel fire resistance test；
Immersed tube tunnel can be preferably simulated in the present invention load is big and the asymmetric deformation of fire working, improve test
Precision, different fire working researchs occur for porous immersed tube tunnel engineering and provide strong support with design.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of illustrative examples of the present invention, illustrative examples will be described below
In required attached drawing be briefly described, do not constitute improper limitations of the present invention.
Fig. 1 is a kind of structure chart of single hole immersed tube tunnel top plate fire resistance experiment loading unit provided by the invention；
Fig. 2 is a kind of structure chart of self-balancing reaction frame provided by the invention；
Fig. 3 is a kind of structure chart of roller bearing loading device provided by the invention；
Fig. 4 is the side view of level-one distribution beam provided by the invention；
Fig. 5 is a kind of structure chart of bearing loading device provided by the invention；
Fig. 6 is a kind of device figure of tripod power transmission provided by the invention；
In figure: 1 is self-balancing reaction frame, and 2 be hydraulic jack, and 2-1 is upper anchor slab, and 2-2 is pull rod, and 2-3 is to cast anchor
Plate, 3 be roller bearing loading device, and it be roller bearing, 3-3 be slot rolling, 3-4 is first dismountable connection dress that 3-1, which is transmission rod, 3-2,
Set, 3-5 is level-one distribution beam, 4 be bearing loading device, and it be solid half roller bearing, 4-3 is second detachable that 4-1, which is bearing, 4-2,
Attachment device, 4-4 is secondary distribution beam, 4-5 is the first hemisphere, 5 be tripod load transfer device, and 5-1 is billet, 5-2
It is hollow round steel pipe, 5-3 be reinforcing bar, 5-4 is the second hemisphere.
Specific embodiment
Embodiments of the present invention are described below in detail, are done by taking several specific embodiments as an example into one below in conjunction with attached drawing
The explanation of step, wherein all technical and scientific terms are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
Those skilled in the art of the present technique are appreciated that unless expressly stated, used herein of singular " one ", "an"
" described " also includes plural form.It is to be further understood that wording " comprising " practical in description of the invention refers to
There are the feature, step, operation and devices, but it is not excluded that in the presence of or add one or more other features, step, behaviour
Work and device.It should be understood that when our weighing devices are " connected " or " fixation " is to another device, it can be directly connected to or
It is fixed, or there may also be intermediate devices.In addition, " connection " used herein or " fixation " may include be detachably connected or
It is affixed.
The present embodiment devises a kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit, immersed tube tunnel single hole fire
The structure chart of calamity model test loading device is as shown in Figure 1, include self-balancing reaction frame 1, hydraulic jack 2, roller bearing load dress
Set 3, two bearing loading devices 4, four tripod load transfer devices 5, immersed tube tunnels 6.
Hydraulic jack 2 is fixed on 1 top beam of self-balancing reaction frame by upper anchor slab 2-1, pull rod 2-2 and lower anchor slab 2-3,
1 bottom beam middle line of self-balancing reaction frame is placed on 6 longitudinal direction length middle line of immersed tube tunnel, and hydraulic jack 1 passes through computer control
Load rate processed and load act on 6 top plate of 1 top beam of self-balancing reaction frame and immersed tube tunnel, and power is transmitted to immersed tube tunnel
Reach the self-balancing of reaction frame on 6 bottom plate of road and reaction frame bottom beam by 1 column of reaction frame, as shown in Figure 2.
The roller bearing loading device 3 includes transmission rod 3-1, roller bearing 3-2 and slot rolling 3-3；One end of the transmission rod 3-1
It is connect with the loading end of hydraulic jack 2, the other end is fixedly connected with roller bearing 3-2；The roller bearing 3-2 as in slot rolling 3-3, and
And roller bearing 3-2 curved surface is identical as slot rolling 3-3 curved surface；The roller bearing loading device 4 is solid by first dismountable attachment device 3-4
It is scheduled on the middle of level-one distribution beam 3-5, passes through the rotation in the realization plane of roller bearing load transfer device 3 in loading procedure, ensures whole
The stability of a loading device, as shown in Figure 3.Also, the upper surface of the slot rolling 3-3 is alongst provided with for power transmission
The resigning mouthful that bar 3-1 is passed through, can bear the power of the application of hydraulic jack 2 and indeformable, and adapt to level-one distribution beam 3-5
With the rotation between hydraulic jack 2, the rotation only done in plane guarantees the stability of loading device, and can play when not reinforcing
Also it can guarantee the globality of loading device.
The bearing loading device 4 includes bearing 4-1, solid half roller bearing 4-2 and the first hemisphere 4-5；The bearing 4-1
Inner periphery on fix the solid half roller bearing 4-2, and the level-one distribution beam 35 passes through the inner circle of bearing 4-1, and two
End is respectively at solid half roller bearing 4-2 contact；The excircle bottom of the bearing 4-1 passes through second dismountable attachment device 4-3
It is fixed on the middle secondary distribution beam 4-4, the planar ends of the first hemisphere 4-5 are fixed on the secondary distribution bottom surface beam 4-4 both ends.
The sphere end of the first hemisphere 4-5 and the upper surface contact of tripod load transfer device 5, tripod load transfer device
The upper surface of immersed tube tunnel 6 is arranged in 5 lower end surface；
The tripod load transfer device 5 includes billet 5-1, hollow round steel pipe 5-2；The one of the hollow round steel pipe 5-2
End is connected to the lower surface of billet 5-1, and multiple hollow round steel pipe 5-2 rotate in a circumferential direction symmetrically along the lower surface of billet 5-2
Its mutual angle, the hollow round steel pipe 5- of adjacent two is arranged according to required load in distribution, hollow round steel pipe 5-2
Reinforcing bar 5-3 is connected between 2 as pull rod.
The bottom of the hollow round steel pipe 5-2 and the planar ends of the second hemisphere 5-4 are fixed.In the present embodiment, open circles
Steel pipe 5-2 is three, and corresponding three the second hemisphere 5-4 constitute equilateral triangle, passes through 4 three feet in loading procedure
Frame load transfer device 5 is uniformly loaded into power 6 hole top plate middle of immersed tube tunnel, as shown in Figure 5.
When being tested, specific test process is as follows:
(1) suitable reaction frame, roller bearing load dress should be selected according to test model size and the size of required load first
It sets, the reasonable size of bearing loading device, tripod load transfer device and reasonable hydraulic jack loading device；
(2) relevant apparatus is disposed according to each section schematic diagram shown in FIG. 1, it is heavy that 4 tripod load transfer devices are placed on
Two hole top plate middle of pipe tunnel is evenly arranged, and two secondary distribution beams are parallel to immersed tube tunnel cross section by 4 hemispheres
It is placed on tripod, level-one distribution beam is placed on secondary distribution beam midpoint, roller bearing longitudinally through 4 bearings along immersed tube tunnel
Load transfer device is fixed with level-one distribution beam midpoint and is fixed with hydraulic jack action head；
(3) when test is loaded, if two hole roof deformation of immersed tube tunnel is asymmetric, upper roller loading device and bearing
The rotation of certain angle can occur for loading device, guarantee that tripod is fitted closely with immersed tube tunnel top surface, power is enable to protect always
Vertical test model top surface is held to transmit downwards；
(4) after testing, unload the power of hydraulic jack, after remove tripod and successively dismantle from bottom to top again, can follow
Ring utilizes this loading device.
The embodiment of the present invention is adapted to by loading device it can be seen from the technical solution that the embodiments of the present invention provide
The asymmetry of immersed tube tunnel single hole fire roof deformation, ensures the stability of entire loading device, overcomes traditional loading device pair
In the limitation of immersed tube tunnel single hole fire test, the safety and precision of test process are improved, is multibore tunnel in different fire
Working condition tests research is provided strong support with design.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can
To readily appreciate that variation disclosed in this invention or technical scope.Alternative solution is intended to cover within the scope of the invention.Cause
This, protection scope of the present invention should be determined by the scope of the claims.
Claims (6)
1. a kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit, it is characterised in that: including self-balancing reaction frame, liquid
Press loading device, the tripod load transfer device of loading device, two kinds of different rotation formulas；The different rotation load dresses of described two kinds
It sets and respectively includes roller bearing loading device and bearing loading device；
The roller bearing loading device includes transmission rod, roller bearing and slot rolling；One end of the transmission rod and adding for hydraulic loading device
End connection is carried, the other end is fixedly connected with roller bearing；The roller bearing is placed in slot rolling, and roller bearing curved surface is identical as slot rolling curved surface；
The roller bearing loading device is fixed on the middle of level-one distribution beam by first dismountable attachment device, leads in loading procedure
Cross the rotation in roller bearing load transfer device realization plane；
The bearing loading device includes bearing, solid half roller bearing and the first hemisphere；Institute is fixed on the inner periphery of the bearing
Solid half roller bearing is stated, and the level-one distribution beam passes through the inner circle of bearing, and both ends are respectively at solid half roller bearing contact；Institute
The excircle bottom for stating bearing is fixed on secondary distribution beam middle by second dismountable attachment device, and first is hemispheroidal
Planar ends are fixed on secondary distribution soffit both ends；
The upper surface contact of the first hemispheroidal sphere end and tripod load transfer device, the lower end surface of tripod load transfer device
The upper surface of immersed tube tunnel is set；
The hydraulic loading device is fixed on the top beam of self-balancing reaction frame；Self-balancing reaction frame bottom beam middle line is placed on immersed tube tunnel
On road longitudinal direction length middle line；Hydraulic loading device acts on self-balancing by computer control load rate and load
On reaction frame top beam and immersed tube tunnel top plate, power is transmitted on the bottom beam of immersed tube tunnel and self-balancing reaction frame anti-by self-balancing
The column of power frame reaches the self-balancing of reaction frame.
2. a kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit according to claim 1, it is characterised in that:
The hydraulic loading device is hydraulic jack, and the top of self-balancing reaction frame is fixed on by upper anchor slab, pull rod and lower anchor slab
Liang Shang.
3. a kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit according to claim 1, it is characterised in that:
The tripod load transfer device includes billet, hollow round steel pipe；One end of the hollow round steel pipe is connected under billet
Surface, multiple hollow round steel pipes rotate in a circumferential direction symmetrical along the lower surface of billet, and hollow round steel pipe is according to required load
Its mutual angle is arranged in size, is connected with reinforcing bar as pull rod between two adjacent hollow round steel pipes.
4. a kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit according to claim 3, it is characterised in that:
Second hemisphere is three, distribution in equilateral triangle.
5. a kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit according to claim 4, it is characterised in that:
The bottom of the hollow round steel pipe is fixed with the second hemispheroidal planar ends.
6. a kind of single hole immersed tube tunnel top plate fire resistance experiment loading unit according to claim 1, it is characterised in that:
The upper surface of the slot rolling is alongst provided with the resigning mouthful passed through for transmission rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442550.3A CN109406184B (en) | 2018-11-29 | 2018-11-29 | Single-hole immersed tube tunnel roof fire resistance test loading device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442550.3A CN109406184B (en) | 2018-11-29 | 2018-11-29 | Single-hole immersed tube tunnel roof fire resistance test loading device |
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| CN109406184A true CN109406184A (en) | 2019-03-01 |
| CN109406184B CN109406184B (en) | 2023-08-29 |
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| CN113009067A (en) * | 2021-02-25 | 2021-06-22 | 中国矿业大学 | Tunnel structure multi-dimensional space loading fire test system and implementation method thereof |
| CN117589498A (en) * | 2024-01-18 | 2024-02-23 | 应急管理部四川消防研究所 | Fireproof test device and method |
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| CN113009067A (en) * | 2021-02-25 | 2021-06-22 | 中国矿业大学 | Tunnel structure multi-dimensional space loading fire test system and implementation method thereof |
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| CN117589498A (en) * | 2024-01-18 | 2024-02-23 | 应急管理部四川消防研究所 | Fireproof test device and method |
| CN117589498B (en) * | 2024-01-18 | 2024-04-19 | 应急管理部四川消防研究所 | Fireproof test device and method |
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| CN109406184B (en) | 2023-08-29 |
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