CN105510020B - A kind of variable-width bridge expanssion joint test platform and its construction method - Google Patents
A kind of variable-width bridge expanssion joint test platform and its construction method Download PDFInfo
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- CN105510020B CN105510020B CN201610035827.5A CN201610035827A CN105510020B CN 105510020 B CN105510020 B CN 105510020B CN 201610035827 A CN201610035827 A CN 201610035827A CN 105510020 B CN105510020 B CN 105510020B
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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
- G01M13/00—Testing of machine parts
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
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Abstract
The invention discloses a kind of variable-width bridge expanssion joint test platform and its construction method, feature is：Test platform is included positioned at bottom and for the foundation of bearing test platform upper load and test vehicle load, the fixed bottom steel plate being layed in above foundation, it is arranged on the top steel plate in bottom steel plate, being arranged between bottom steel plate and top steel plate makes top steel plate relative to the force application apparatus that bottom steel plate is moved, expansion joint component, pavement concrete platform and first for installing expansion joint component, second coagulation earthen platform, top steel plate is exerted a force by force application apparatus, top steel plate is set to be moved relative to bottom steel plate, so as to which the width at expansion joint is decreased or increased, advantage is：There is provided a kind of convertible expansion joint type, the full-scale bridge expanssion joint test platform of expansion joint width can be changed, can truly reflect the actual performance of bridge telescoping member, result of the test accuracy is high.
Description
Technical field
The present invention relates to bridge expanssion joint test platform field, more particularly to a kind of experiment of variable-width bridge expanssion joint are flat
Platform and its construction method.
Background technology
Bridge expanssion joint is mainly used in adapting to bridge in gradient of temperature as the important component on highway bridge road surface
The contraction of produced flexible and bridge concrete and creep, so as to ensure the security and comfortableness of vehicle pass-through on bridge.
Since 1980s, with flourishing for highway in China bridge construction, various types of retractor devices exist
Largely used on bridge.Expansion joint is the part " discontinuous segment " of bridge pavement, in actual use, meeting when vehicle is crossed
Produce and jump car phenomenon, this percussion causes expansion joint to be very easy to damage in actual use.Due to China's starting
Later, up to now, the research for the problems such as country is to the design feature of all kinds of retractor devices, performance requirement and detection point is not yet
It is ripe.In research process, for the correctness of proof theory, generally require to carry out related experiment, and be limited by fund and
The deficiencies such as technology, the existing experiment on retractor device is often using the method for building scaled model.Scale (model) test can
To reflect the very many performances of retractor device, still, there are many differences in itself and bridge actual conditions, such as：Reduced scale stretches
Seam component and lorry have compared many simplification with actual expansion joint component and lorry, it is impossible to reflect their complicated constructions,
So that result of the test can not reflect the actual performance of retractor device completely, result of the test also tends to inaccurate.Moreover, actual
There is much the type at expansion joint, but existing scientific experimentation is often confined to a certain expansion joint type in bridge so that gained
The result of the test arrived does not have generality.
The content of the invention
In order to solve above-mentioned the deficiencies in the prior art, a kind of variable-width bridge expanssion joint experiment of the invention is flat
Platform and its construction method, using the teaching of the invention it is possible to provide a kind of convertible expansion joint type, can change expansion joint width full-scale bridge stretch
Test platform is stitched, can truly reflect the actual performance of bridge telescoping member, result of the test accuracy is high.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：A kind of variable-width bridge expanssion joint experiment is flat
Platform, it is characterised in that including being used for the basic courses department for carrying the test platform upper load and test vehicle load positioned at bottom
Point, fixed be layed in the bottom steel plate above the foundation, the top steel plate that is arranged in the bottom steel plate, be arranged on
Between the bottom steel plate and the top steel plate and for making the top steel plate relative to applying that the bottom steel plate is moved
Power apparatus, expansion joint component,
The expansion joint component is made up of the Part I component and Part II component being engaged, the top steel plate
Top is cast with the pavement concrete platform that is close together and the first coagulation earthen platform for installing the Part I component, institute
State the top of foundation and be cast with the second coagulation earthen platform for installing the Part II component against the bottom steel plate,
The distance between the Part I component and the Part II component be above the width at expansion joint, the foundation and
Teeming has in order that the first supplement road surface coagulation that test vehicle is normally crossed between road surface and the pavement concrete platform
Earthen platform, preset slot is provided between the first supplement pavement concrete platform and the pavement concrete platform, the preset slot
Top is covered with for making the road surface that test vehicle is normally crossed overlap above steel plate, the foundation and positioned at road surface and institute
State between the second coagulation earthen platform closely teeming and have in order that the second supplement pavement concrete platform that test vehicle is normally crossed,
The top steel plate is exerted a force by the force application apparatus, makes the top steel plate towards close to second coagulation
The direction movement of earthen platform, the width at the expansion joint reduces, the width increase of the preset slot；By the force application apparatus to institute
Top steel plate force is stated, the top steel plate is moved away from the direction of the second coagulation earthen platform, the expansion joint
Width increases, and the width of the preset slot reduces.Thus, test platform truly reflects the actual performance of bridge extension joint, and
And can change expansion joint width, a variety of test cases are simulated, make that result of the test is more accurate, more generality.
In some embodiments, the foundation includes cushion cap and be arranged on the cushion cap bottom many are prefabricated
Stake, the bottom steel plate is laid on the cushion cap, the second coagulation earthen platform, the first supplement pavement concrete platform and
The second supplement pavement concrete platform is cast on the cushion cap.Thus, stable entirety is constituted, bearing test is more beneficial for
Platform upper load and test vehicle load.
In some embodiments, the force application apparatus includes two edges for being arranged on side in the bottom steel plate
Two the first jack, be arranged on opposite side in the bottom steel plate two edges two the second jack, it is described
The top cap of first jack is abutted with the side of the top steel plate side, passes through top steel plate described in first jack pair
Force, reduces the width at the expansion joint；The top cap of second jack and the side of the top steel plate opposite side are supported
Connect, exerted a force by top steel plate described in second jack pair, increase the width at the expansion joint.Thus, by very heavy
The change of expansion joint width is realized on top, simple in construction, is constructed and easy to operate.
In some embodiments, the first fastening assembly and second are passed through between the top steel plate and the bottom steel plate
Fastening assembly is fixedly connected, and first fastening assembly includes：It is arranged on the first fluting of the top steel plate both sides, is arranged on
The multiple first reserved screws and the described first reserved screw in the bottom steel plate corresponding with first slotting position
The first bolt used cooperatively and the first nut used cooperatively with first bolt；Second fastening assembly includes：
Be arranged in the top steel plate three the second flutings arranged in parallel, be arranged on it is corresponding with second slotting position
The multiple second reserved screws in the bottom steel plate, the second bolt used cooperatively with the described second reserved screw and with institute
State the second nut that the second bolt is used cooperatively；It is additionally provided with the pavement concrete platform relative with second slotting position
The through slot answered.Thus, no matter making top steel plate and bottom steel plate closely connect in both sides or middle part, transverse direction or longitudinal direction
Connect, will not separate, reduce the vibration of platform itself when test vehicle is crossed, it is ensured that the accuracy of result of the test.
In some embodiments, the distance between described through slot in two, outside is less than the wheel clear distance of test vehicle.
Thus, through slot can be avoided when vehicle is crossed, it is ensured that the accuracy of test result.
In some embodiments, between the cushion cap and the bottom steel plate, the top steel plate is mixed with the road surface
Connected between solidifying earthen platform by shearing connecting piece.Thereby, it is possible to make them closely connect, an entirety is formed.
In some embodiments, the change width scope at the expansion joint is 0~16cm, the width at the expansion joint by
During 0 is changed into 16cm, the width of the preset slot is changed into 0 from 16cm accordingly.Thus, with the flexible slit width of actual bridge
Degree change be consistent, can accurately simulation realistic bridges beam expansion joint width change.
In some embodiments, the Part I component is 1m the first expansion joint module along road by three length
Face width close-packed arrays are constituted, the Part II component is corresponding by three length be 1m the second expansion joint module
Close-packed arrays are constituted.Thus, the construction with the expansion joint component of actual bridge is identical, can accurately reflect its structure and property
Energy.
In some embodiments, waterproof awning is covered with above the test platform, the waterproof awning passes through awning
Base station is fixedly connected with the road surface of cushion cap periphery, and it is 2~5 ° of inclinations that the top surface of the waterproof awning, which is arranged to angle of inclination,
Face, the minimum altitude of the waterproof awning is more than the height of test vehicle.Thus, it is possible to make the water bodys such as rainwater along waterproof awning
Top surface slide and be discharged to outside test platform, reduce adverse effect of the water body to test platform, and waterproof rain to a certain extent
The height of canopy is more than the height of test vehicle, does not interfere with the normal pass of test vehicle.
A kind of construction method of above-mentioned variable-width bridge expanssion joint test platform, it is characterised in that including following step
Suddenly：
1. drive piles：Dug out on road surface install test platform suitable size foundation ditch, with excavator by the pre- of four long 3m
Stake processed is vertically in the dug foundation ditch of press-in；
2. cushion cap is poured into a mould：Anchor bar is reserved with prefabricated pile stake, cushion cap bottom is equipped with vertically and horizontally steel bar stress, by anchor
Gu reinforcing bar gos deep into the vertically and horizontally steel bar stress of cushion cap, cushion cap and prefabricated pile is set to form entirety；
3. steel plate is installed：Bottom steel plate is laid above cushion cap, bottom steel plate is connected with enough shearing connecting pieces and holds
Platform, makes them form an entirety；Top steel plate is placed above bottom steel plate, and the first bolt is screwed into bottom steel plate both sides
The first reserved screw in, the second bolt is screwed into the second reserved screw of bottom steel plate, then with box spanner by the first spiral shell
Mother is tightened with the first bolt, and the second nut is tightened with the second bolt, top steel plate and bottom steel plate is closely connected；In bottom
Four edges on steel plate are installed for making top steel plate relative to the jack that bottom steel plate is moved, its top cap and upper steel
Plate side is abutted；
4. coagulation earthen platform is poured into a mould：Sufficient amount of shearing connecting piece is welded above the steel plate of top, and cast leaves three
The pavement concrete platform of through slot, is close to pavement concrete platform and pours into a mould the first coagulation earthen platform, bottom steel is abutted in the top of cushion cap
Plate pours into a mould the second coagulation earthen platform；
5. expansion joint component is installed：Part I component is respectively mounted above the first coagulation earthen platform and the second coagulation earthen platform
With Part II component, the distance between Part I component and Part II component are the width at expansion joint；
6. teeming pavement concrete：In order that the smooth drive-by test platform of test vehicle, the teeming road surface in the foundation ditch of digging
Concrete, on cushion cap and positioned between road surface and pavement concrete platform teeming first supplement pavement concrete platform, during teeming with
Preset slot is left between pavement concrete platform, the width of preset slot and the width sum at expansion joint are 16cm；On cushion cap and position
Teeming second supplements pavement concrete platform between road surface and the second coagulation earthen platform, makes the second supplement pavement concrete platform and second
Coagulation earthen platform is brought into close contact；
7. road surface overlap joint steel plate is installed：Road surface overlap joint steel plate is installed in laying above preset slot, for making test vehicle suitable
Profit is crossed；
8. road surface is repaired, construction is completed.
Compared with prior art, the advantage of the invention is that：
（1）By force application apparatus, top steel plate and bottom steel plate can realize relative movement, so as to realize expansion joint width
Change, come simulate actual bridge because expanded by heating or contract on cooling and caused by expansion joint width change, the present invention in stretch
The excursion of slit width degree is 0 ~ 16mm, and this is consistent with the expansion joint width change of actual bridge, therefore, of the invention
Test platform can accurately simulation realistic bridges beam expansion joint width change.
（2）By the way that the concrete of expansion joint component surrounding is chiseled out, take out whole expansion joint component and reinstall new
The mode of expansion joint component, can reach the purpose for changing expansion joint type, and realization is tested polytype expansion joint,
Make result of the test that there is generality.
（3）Top steel plate and bottom steel plate are fixedly secured by friction type high strength bolt, will by shearing connecting piece
Top steel plate links together with pavement concrete platform, bottom steel plate and cushion cap, so that whole test platform formation one is tight
The entirety of close combination, when vehicle is crossed, platform will not produce too big vibration to influence the standard of the test results such as dynamic response
True property.
（4）Foundation uses pile foundation, and bearing capacity is high, and non-deformability is strong, disclosure satisfy that expansion joint is harsher
Installation accuracy requirement.
（5）Whole test platform construction is simple, quick, cost is low, expensive without professional construction machinery in addition to excavator
Admission fee, it is practical.
（6）On the test platform of the present invention can conveniently and efficiently polytype sensor such as arrangement sound, electricity, light,
It is expanded joint structure intensity, fatigue, damage, structure for testing the expansion joint such as displacement, strain, acceleration, acoustic pressure dynamic response
The research of optimization provides basic test data, contributes to the accuracy of the related theoretical analysis method of checking.
Brief description of the drawings
Fig. 1 is the structural representation of the main part of one embodiment of the invention；
Fig. 2 is the structural representation of one embodiment of the invention；
Fig. 3 is the bottom steel plate, top steel plate and the structural representation of pavement concrete platform part of one embodiment of the invention；
Fig. 4 is Fig. 3 top view；
Fig. 5 is that one embodiment of the invention increases the structural representation of waterproof awning.
Embodiment
A kind of variable-width bridge expanssion joint test platform of the invention is described in further detail below in conjunction with accompanying drawing, but
It is not as a limitation of the invention.
Embodiment 1
As Figure 1-Figure 4, a kind of variable-width bridge expanssion joint test platform includes：Positioned at bottom and for carrying examination
Test the foundation of platform upper load and test vehicle load, the fixed bottom steel plate 3 being layed in foundation, be arranged on
Top steel plate 4 in bottom steel plate 3, be arranged between bottom steel plate 3 and top steel plate 4 and for make top steel plate 4 relative to
Force application apparatus, the expansion joint component of the movement of bottom steel plate 3.
Foundation is for bearing the upper load of test platform and reducing the differential settlement of test platform, this reality
Apply in example, foundation includes cushion cap 2 and is arranged on many prefabricated piles 1 of the bottom of cushion cap 2, and bottom steel plate 3 is laid on cushion cap 2
On.Prefabricated pile 1 be provided with 4, a diameter of 400mm, length be 3m, the height of cushion cap 2 is 300mm, and the bottom of cushion cap 2 is equipped with length and breadth
To steel bar stress, the anchor bar that prefabricated pile 1 is reserved gos deep into making cushion cap 2 and prefabricated pile 1 form entirety in cushion cap 2.Thus, in advance
Stake 1 processed and cushion cap 2 have good bearing capacity and non-deformability, are particularly suitable for the thicker Jiangnan regions construction of Soft Soil Layer.
Expansion joint component is made up of the Part I component 61 and Part II component 71 being engaged, top steel plate 4 it is upper
Side is cast with the pavement concrete platform 5 that is close together and the first coagulation earthen platform 6 for installing Part I component 61, cushion cap
2 top is cast with the second coagulation earthen platform 7 for installing Part II component 71, Part I component against bottom steel plate 3
It is expansion joint 72 between 61 and Part II component 71, the distance between Part I component 61 and Part II component 71 are to stretch
The width of contracting seam 72.
Have on cushion cap 2 and positioned at teeming between road surface and pavement concrete platform 5 in order that test vehicle normally cross the
One supplement pavement concrete platform 8, is provided with preset slot 53, in advance between the first supplement pavement concrete platform 8 and pavement concrete platform 5
Stay the top of seam 53 covered with for make the road surface that test vehicle normally crosses overlap on steel plate 52, cushion cap 2 and positioned at road surface with
There is in order that the second supplement pavement concrete platform 9 that test vehicle is normally crossed close teeming between second coagulation earthen platform 7.Mend
The the first supplement pavement concrete platform 8, second poured, which is supplemented, closely forms an entirety between pavement concrete platform 9, cushion cap 2.
In the present embodiment, force application apparatus includes be arranged on two edges of side in bottom steel plate 3 two the 1000th
Jin top 31, be arranged on opposite side in bottom steel plate 3 two edges two the second jack 32.The top of first jack 31
Cap is abutted with the side of the side of top steel plate 4, and top steel plate 4 is exerted a force by the first jack 31, make top steel plate 4 towards by
The direction movement of nearly second coagulation earthen platform 7, reduces the width at expansion joint 72, the width increase of preset slot 53.Second jack
32 top cap is abutted with the side of top steel plate opposite side, and top steel plate 4 is exerted a force by the second jack 32, makes top steel plate
4 move away from the direction of the second coagulation earthen platform 7, the width at expansion joint 72 increase, the reduction of the width of preset slot 53.This reality
Apply in example, the change width scope at expansion joint 72 is 0~16cm, during the width at expansion joint 72 is changed into 16cm from 0, is reserved
The width of seam 53 is changed into 0 from 16cm accordingly.Accordingly, overlap joint steel plate 52 in road surface has different width dimensions, so as to flexible
Stitch after the change of 72 width, the road surface overlap joint steel plate 52 for changing suitable width size is laid on the top of preset slot 53 to connect two dypass
Face.
As shown in figure 4, in the present embodiment, test platform also includes：For fixing top steel plate 4 and bottom steel plate 3
One fastening assembly and the second fastening assembly.First fastening assembly includes：It is arranged on the first fluting of the insertion of the both sides of top steel plate 4
41st, the multiple first reserved screws and the first reserved screw in the bottom steel plate 3 corresponding with the first 41 positions of fluting are arranged on
In the first bolt used cooperatively and the first nut 42 used cooperatively with the first bolt, the present embodiment, the first bolt is to rub
Wiping type high-strength bolt.Second fastening assembly includes：Three the second flutings arranged in parallel, settings being arranged in top steel plate 4
Multiple second in the bottom steel plate 3 corresponding with the second slotting position reserve screws, are used cooperatively with the second reserved screw
The second bolt 54 and the second nut for being used cooperatively with the second bolt, in the present embodiment, the second bolt 54 is that friction-type is high
Strength bolt.The through slot 51 corresponding with the second slotting position is additionally provided with pavement concrete platform 5.First fastening assembly is set
Effect with the second fastening assembly is：Make top steel plate 4 and bottom steel plate 3 at both sides and middle part, horizontal and vertical closely connect
Connect, will not separate, reduce the vibration of platform itself when test vehicle is crossed, it is ensured that the accuracy of result of the test.Through slot is set
51 effect is：After mobile top steel plate 4, the second nut and the second bolt 54 are tightened to reserved behaviour by box spanner
Make space.Wherein, the distance between two through slots 51 in outside are less than the wheel clear distance of test vehicle, and thus, vehicle is crossed
When can avoid through slot 51, it is ensured that the accuracy of test result.
In the present embodiment, by enough between cushion cap 2 and bottom steel plate 3, between top steel plate 4 and pavement concrete platform 5
Shearing connecting piece connection, to become an entirety.
Expansion joint component is made up of the Part I component 61 and Part II component 71 being engaged, Part I component 61
It is that width close-packed arrays of 1m the first expansion joint module along road surface are constituted by three length, 71 pairs of Part II component
That answers is made up of the second expansion joint module close-packed arrays that three length are 1m.On the construction of expansion joint component and actual bridge
Used expansion joint structure is identical, therefore, and the result of the test that the present invention is obtained can truly reflect bridge extension joint
Actual performance, result of the test is more accurate.If the length of test platform is identical with actual bridge length, on the one hand whole examination
The cost for testing platform manufacture is higher, and difficulty of construction is larger；On the other hand the function of conversion expansion joint width is not easily accomplished.Cause
This, in the present embodiment, from the point of view of economical and practical, takes experiment porch length to be 3.4m along width of roadway direction, point
Not An Zhuan 3 the first expansion joint modules and the second expansion joint module, and respectively stay 0.2m operating space in expansion joint component both sides.
The present invention can convert expansion joint type, all may be used such as conventional modulus type expansion joint, broach board-like expansion joint
Applied to this test platform.
As shown in figure 5, in the present embodiment, being also covered with waterproof awning 10 above test platform, waterproof awning 10 passes through rain
The road surface of the periphery of canopy base station 101 and cushion cap 2 is fixedly connected, and the top surface 102 of waterproof awning 10 is arranged to angle of inclination and inclined for 5 degree
Inclined-plane, the minimum altitude of waterproof awning 10 is more than in the height of test vehicle, the present embodiment, and the minimum altitude of waterproof awning 10 is
5m.Thus, waterproof awning 10 can be such that the water bodys such as rainwater slide along top surface 102 to be discharged to outside test platform, to a certain extent
Reduce adverse effect of the water body to test platform, and the height of waterproof awning 10 sets the height for being more than test vehicle, will not
Influence the normal pass of test vehicle.
The construction method to a kind of variable-width bridge expanssion joint test platform of the present invention is made further specifically below
It is bright but not as a limitation of the invention.
Embodiment 2
A kind of construction method of variable-width bridge expanssion joint test platform of the present invention, comprises the following steps：
1. drive piles：Dug out on road surface install test platform suitable size foundation ditch, with excavator by the pre- of four long 3m
Stake 1 processed is vertically in the dug foundation ditch of press-in.Piling machine need not be used to be constructed, prefabricated pile 1 can be pressed into excavator
In foundation ditch, construction cost is saved.
2. cushion cap 2 is poured into a mould：Anchor bar is reserved with prefabricated pile 1, the bottom of cushion cap 2 equipped with vertically and horizontally steel bar stress,
Anchor bar is goed deep into the vertically and horizontally steel bar stress of cushion cap 2, cushion cap 2 and prefabricated pile 1 is formed entirety.
3. steel plate is installed：In the top of cushion cap 2 laying bottom steel plate 3, the He of bottom steel plate 3 is connected with enough shearing connecting pieces
Cushion cap 2, makes them form an entirety；Top steel plate 4 is placed in the top of bottom steel plate 3, and the first bolt is screwed into bottom steel
In the reserved screw of the first of the both sides of plate 3, the second bolt is screwed into the second reserved screw of bottom steel plate 3, then use box spanner
First nut 42 and the first bolt are tightened, the second nut is tightened with the second bolt 54, makes top steel plate 4 and bottom steel plate 3
Close connection；Four edges in bottom steel plate 3 install for make that top steel plate 4 moves relative to bottom steel plate 3
One jack 31 and the second jack 32, its top cap are abutted sideways with top steel plate 4.
4. coagulation earthen platform is poured into a mould：The sufficient amount of shearing connecting piece of the top of steel plate 4 welding on top, and pour into a mould road surface coagulation
Earthen platform 5, is close to pavement concrete platform 5 and pours into a mould the first coagulation earthen platform 6, is mixed in the top of cushion cap 2 against the cast of bottom steel plate 3 second
Solidifying earthen platform 7.
5. expansion joint component is installed：Part I structure is respectively mounted in the first coagulation earthen platform 6 and the top of the second coagulation earthen platform 7
Part 61 and Part II component 71, the distance between Part I component 61 and Part II component 71 are the width at expansion joint 72
Degree.
6. teeming pavement concrete：In order that the smooth drive-by test platform of test vehicle, the teeming road surface in the foundation ditch of digging
Concrete, on cushion cap 2 and positioned at the supplement pavement concrete of teeming first platform 8 between road surface and pavement concrete platform 5, during teeming
Preset slot 53 is left between pavement concrete platform 5, the width of preset slot 53 is 16cm with the width sum at expansion joint 72；Holding
On platform 2 and positioned at the supplement pavement concrete of teeming second platform 9 between road surface and the second coagulation earthen platform 7, mix the second supplement road surface
Solidifying earthen platform 9 is brought into close contact with the second coagulation earthen platform 7.
7. road surface overlap joint steel plate 52 is installed：Road surface overlap joint steel plate 52 is installed in the laying of the top of preset slot 53, for making experiment
Vehicle is smoothly crossed.
8. road surface is repaired, construction is completed.
When needing to convert the width at expansion joint 72, road surface overlap joint steel plate 52 is taken out, using box spanner by the first spiral shell
The nut of mother 42 and second is unscrewed, and is exerted a force by the first jack 31 or the second jack 32 by top steel plate 4 relative to bottom steel
Plate 3 is moved, first of pavement concrete platform 5, the first coagulation earthen platform 6 and its top being thus fixedly connected with top steel plate 4
Divide component 61 as top steel plate 4 is moved, so as to reach the purpose of the width at conversion expansion joint 72.Convert the width at expansion joint 72
After degree, the first nut 42 and the first bolt are tightened using box spanner, the second nut is tightened with the second bolt 54, makes top
Steel plate 4 and bottom steel plate 3 are fixed.Finally reinstall the road surface overlap joint steel plate 52 of suitable width size.
When needing to replace expansion joint component, by chiseling out the concrete of expansion joint component surrounding, i.e. the first coagulation earthen platform
6th, the second coagulation earthen platform 7, part pavement concrete platform 5 and the supplement pavement concrete platform of part second 9, by whole expansion joint structure
Part takes out, and reinstalls new expansion joint component.It is possible thereby to more economically realize the function of changing expansion joint type.
In some embodiments, waterproof awning 10 can be installed after test platform installation.First, in cushion cap 2
Four turnings around install four awning base stations 101, then by waterproof awning 10 be arranged on awning base station 101 on, waterproof rain
Canopy 10 is located above test platform.Road surface is repaired after the installation of waterproof awning 10, road surface is kept smooth, so that instruction carriage
It can pass through.
It is worth noting that, the foregoing is only presently preferred embodiments of the present invention, the patent of the present invention is not thereby limited
Protection domain, the present invention can also carry out the improvement of material and structure to the construction of above-mentioned various parts, or use skill
Art equivalent is replaced.Therefore it is all with the present invention specification and diagramatic content made equivalent structure change, or directly or
Apply to other correlative technology fields indirectly to be similarly all contained in the range of of the invention cover.
Claims (10)
1. a kind of variable-width bridge expanssion joint test platform, it is characterised in that including being used to carry the experiment positioned at bottom
The foundation of platform upper load and test vehicle load, the fixed bottom steel plate being layed in above the foundation, set
The top steel plate in the bottom steel plate is put, is arranged between the bottom steel plate and the top steel plate and be described for making
Top steel plate relative to the force application apparatus, expansion joint component that the bottom steel plate is moved,
The expansion joint component is made up of the Part I component and Part II component being engaged, the top of the top steel plate
It is cast with the pavement concrete platform that is close together and the first coagulation earthen platform for installing the Part I component, the base
The top of plinth part is cast with the second coagulation earthen platform for installing the Part II component against the bottom steel plate, described
The distance between Part I component and the Part II component are above the width at expansion joint, the foundation and are located at
Between road surface and the pavement concrete platform teeming have in order that test vehicle normally cross first supplement pavement concrete platform,
It is provided with above preset slot, the preset slot and covers between the first supplement pavement concrete platform and the pavement concrete platform
It is stamped for making the road surface that test vehicle is normally crossed overlap above steel plate, the foundation and positioned at road surface and described second
Between coagulation earthen platform closely teeming have in order that test vehicle normally cross second supplement pavement concrete platform,
The top steel plate is exerted a force by the force application apparatus, makes the top steel plate towards close to the second coagulation earthen platform
Direction movement, the width at the expansion joint reduces, the width increase of the preset slot；By the force application apparatus on described
Portion's steel plate force, makes the top steel plate be moved away from the direction of the second coagulation earthen platform, the width at the expansion joint
Increase, the width of the preset slot reduces.
2. a kind of variable-width bridge expanssion joint test platform as claimed in claim 1, it is characterised in that the foundation
Including cushion cap and many prefabricated piles for being arranged on the cushion cap bottom, the bottom steel plate is laid on the cushion cap, and described
Two coagulation earthen platforms, the first supplement pavement concrete platform and the second supplement pavement concrete platform are cast in the cushion cap
On.
3. a kind of variable-width bridge expanssion joint test platform as claimed in claim 2, it is characterised in that the force application apparatus
Two the first jack including two edges being arranged on side in the bottom steel plate, it is arranged in the bottom steel plate
Two the second jack of two edges of opposite side, the top cap of first jack and the side of the top steel plate side
Face is abutted, and is exerted a force by top steel plate described in first jack pair, is reduced the width at the expansion joint；Described 2000th
The top cap on jin top is abutted with the side of the top steel plate opposite side, is applied by top steel plate described in second jack pair
Power, increases the width at the expansion joint.
4. a kind of variable-width bridge expanssion joint test platform as claimed in claim 3, it is characterised in that the top steel plate
It is fixedly connected between the bottom steel plate by the first fastening assembly and the second fastening assembly, the first fastening assembly bag
Include：It is arranged on the first fluting of the top steel plate both sides, is arranged on the bottom corresponding with first slotting position
The multiple first reserved screws in steel plate, the first bolt used cooperatively with the described first reserved screw and with first spiral shell
The first nut that bolt is used cooperatively；Second fastening assembly includes：Three be arranged in the top steel plate are arranged in parallel
The second fluting, be arranged in the bottom steel plate corresponding with second slotting position the multiple second reserved screws,
The second bolt used cooperatively with the described second reserved screw and the second nut used cooperatively with second bolt；It is described
The through slot corresponding with second slotting position is additionally provided with pavement concrete platform.
5. a kind of variable-width bridge expanssion joint test platform as claimed in claim 4, it is characterised in that described in two, outside
The distance between through slot is less than the wheel clear distance of test vehicle.
6. a kind of variable-width bridge expanssion joint test platform as claimed in claim 5, it is characterised in that the cushion cap and institute
State between bottom steel plate, connected between the top steel plate and the pavement concrete platform by shearing connecting piece.
7. a kind of variable-width bridge expanssion joint test platform as claimed in claim 6, it is characterised in that the expansion joint
Change width scope is 0~16cm, during the width at the expansion joint is changed into 16cm from 0, the width phase of the preset slot
That answers is changed into 0 from 16cm.
8. a kind of variable-width bridge expanssion joint test platform as claimed in claim 7, it is characterised in that the Part I
Component is made up of the first expansion joint module that three length are 1m along width of roadway direction close-packed arrays, the Part II structure
Part is corresponding to be made up of the second expansion joint module close-packed arrays that three length are 1m.
9. a kind of variable-width bridge expanssion joint test platform as claimed in claim 8, it is characterised in that the test platform
Top is covered with waterproof awning, and the waterproof awning is fixedly connected by awning base station with the road surface of cushion cap periphery, described
It is 2~5 ° of inclined planes that the top surface of waterproof awning, which is arranged to angle of inclination, and the minimum altitude of the waterproof awning is more than test vehicle
Height.
10. a kind of construction method of the variable-width bridge expanssion joint test platform described in claim 9, it is characterised in that bag
Include following steps：
1. drive piles：Dug out on road surface install test platform suitable size foundation ditch, with excavator by four long 3m prefabricated pile
In the dug foundation ditch of vertical press-in；
2. cushion cap is poured into a mould：Anchor bar is reserved with prefabricated pile stake, cushion cap bottom will anchor steel equipped with vertically and horizontally steel bar stress
Muscle gos deep into the vertically and horizontally steel bar stress of cushion cap, cushion cap and prefabricated pile is formed entirety；
3. steel plate is installed：Bottom steel plate is laid above cushion cap, bottom steel plate and cushion cap is connected with enough shearing connecting pieces, makes
They form an entirety；Top steel plate is placed above bottom steel plate, and the first bolt is screwed into the of bottom steel plate both sides
In one reserved screw, the second bolt is screwed into the second reserved screw of bottom steel plate, then with box spanner by the first nut with
First bolt is tightened, and the second nut is tightened with the second bolt, top steel plate and bottom steel plate is closely connected；In bottom steel plate
On four edges install for making top steel plate relative to the jack that bottom steel plate is moved, its top cap and top steel plate side
Face is abutted；
4. coagulation earthen platform is poured into a mould：Sufficient amount of shearing connecting piece is welded above the steel plate of top, and cast leaves three insertions
The pavement concrete platform of groove, is close to pavement concrete platform and pours into a mould the first coagulation earthen platform, poured in the top of cushion cap against bottom steel plate
The second coagulation of note earthen platform；
5. expansion joint component is installed：Part I component and are respectively mounted above the first coagulation earthen platform and the second coagulation earthen platform
Two partial components, the distance between Part I component and Part II component are the width at expansion joint；
6. teeming pavement concrete：In order that the smooth drive-by test platform of test vehicle, the teeming road surface coagulation in the foundation ditch of digging
Soil, pavement concrete platform, during teeming and road surface are supplemented on cushion cap and positioned at teeming first between road surface and pavement concrete platform
Preset slot is left between coagulation earthen platform, the width of preset slot and the width sum at expansion joint are 16cm；On cushion cap and positioned at road
Teeming second supplements pavement concrete platform between face and the second coagulation earthen platform, makes the second supplement pavement concrete platform and the second coagulation
Earthen platform is brought into close contact；
7. road surface overlap joint steel plate is installed：Road surface overlap joint steel plate is installed in laying above preset slot, for making test vehicle smoothly sail
Cross；
8. road surface is repaired, construction is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610035827.5A CN105510020B (en) | 2016-01-20 | 2016-01-20 | A kind of variable-width bridge expanssion joint test platform and its construction method |
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| CN201610035827.5A CN105510020B (en) | 2016-01-20 | 2016-01-20 | A kind of variable-width bridge expanssion joint test platform and its construction method |
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| CN105510020B true CN105510020B (en) | 2017-09-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111287077B (en) * | 2020-03-05 | 2021-08-24 | 顾轩波 | Height-adjustable bridge expansion joint component capable of realizing transverse connection |
| CN112195770A (en) * | 2020-09-10 | 2021-01-08 | 中国一冶集团有限公司 | Adjustable temporary expansion joint cover plate device |
| CN116105958B (en) * | 2023-04-10 | 2023-07-25 | 四川蜀工公路工程试验检测有限公司 | Road and bridge expansion joint impact resistance data simulation experiment system and method |
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