CN105510020A - Variable-width bridge expansion joint test platform and construction method thereof - Google Patents
Variable-width bridge expansion joint test platform and construction method thereof Download PDFInfo
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- CN105510020A CN105510020A CN201610035827.5A CN201610035827A CN105510020A CN 105510020 A CN105510020 A CN 105510020A CN 201610035827 A CN201610035827 A CN 201610035827A CN 105510020 A CN105510020 A CN 105510020A
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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 variable-width bridge expansion joint test platform and a construction method thereof. The variable-width bridge expansion joint test platform is characterized by comprising a foundation part, a bottom steel plate, an upper steel plate, a force applying device, an expansion joint member, a pavement concrete platform, a first concrete platform and a second concrete platform, wherein the foundation part is arranged at the bottom part and is used for carrying the upper load of the test platform and the load of a test vehicle; the bottom steel plate is fixedly paved above the foundation part; the upper steel plate is arranged on the bottom steel plate; the force applying device is arranged between the bottom steel plate and the upper steel plate, and is used for enabling the upper steel plate to move relative to the bottom steel plate; the first concrete platform and the second concrete platform are used for mounting the expansion joint member; the force applying device is used for applying force to the upper steel plate, so that the upper steel plate is moved relative to the bottom steel plate, and then the width of an expansion joint is increased or decreased. The variable-width bridge expansion joint test platform has the advantage that a whole-size bridge expansion joint test platform with variable expansion joint type and variable expansion joint width is provided; the actual property of a bridge expansion member is truly reflected, and the accuracy of test results is high.
Description
Technical field
The present invention relates to bridge expanssion joint test platform field, particularly relate to a kind of variable-width bridge expanssion joint test platform and construction method thereof.
Background technology
Bridge expanssion joint, as the important component part on highway bridge road surface, is mainly used in the shrinkage and creep adapting to the flexible and bridge concrete that bridge produces when gradient of temperature, thus ensures security and the comfortableness of vehicle pass-through on bridge.
Since the eighties in 20th century, flourish along with highway in China bridge construction, various types of retractor device uses in a large number on bridge.Expansion joint is the local " discontinuous segment " of bridge pavement, in actual use, can produce and jump car phenomenon when vehicle crosses, and this percussive action makes expansion joint be very easy in actual use damage.Because China starts late, up to now, the research of the problem such as the domestic design feature to all kinds of retractor device, performance requirement and detection point is not yet ripe.In research process, in order to the correctness of proof theory, often need the test carrying out being correlated with, and be limited by the deficiency such as fund and technology, the existing test about retractor device often uses the method for building scaled model.Scale (model) test can reflect the very many-sided performance of retractor device, but, there is many differences in itself and bridge actual conditions, such as: reduced scale expansion joint component and lorry have compared a lot of simplification with actual expansion joint component and lorry, the structure of their complexity cannot be reflected, thus making test findings cannot reflect the actual performance of retractor device completely, test findings is also often inaccurate.And in actual bridge there be much the type at expansion joint, but existing scientific experimentation is often confined to a certain expansion joint type, makes obtained test findings not have ubiquity.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, a kind of variable-width bridge expanssion joint test platform of the present invention and construction method thereof, a kind of convertible expansion joint type can be provided, the full-scale bridge expanssion joint test platform of expansion joint width can be changed, truly can reflect the actual performance of bridge telescoping member, test findings accuracy is high.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of variable-width bridge expanssion joint test platform, it is characterized in that, comprise in bottom for carry described test platform upper load and test vehicle load foundation, being fixedly layed in the bottom steel plate above described foundation, the top steel plate be arranged in described bottom steel plate, being arranged between described bottom steel plate and described top steel plate and for making described top steel plate relative to force application apparatus, the expansion joint component of described bottom steel plate movement
Described expansion joint component is made up of the Part I component matched and Part II component, the top of described top steel plate is cast with the pavement concrete platform that is close together and the first coagulation earthen platform for installing described Part I component, the top of described foundation is cast with the second coagulation earthen platform for installing described Part II component near described bottom steel plate, distance between described Part I component and described Part II component is the width at expansion joint, teeming has and first supplements pavement concrete platform in order to what make test vehicle normally cross above described foundation and between road surface and described pavement concrete platform, described first supplement be provided with preset slot between pavement concrete platform and described pavement concrete platform, the top of described preset slot is coated with the road surface overlap joint steel plate for making test vehicle normally cross, closely teeming has and second supplements pavement concrete platform in order to what make test vehicle normally cross above described foundation and between road surface and described second coagulation earthen platform
By described force application apparatus to described top steel plate force, described top steel plate is moved towards the direction near described second coagulation earthen platform, the width at described expansion joint reduces, and the width of described preset slot increases; By described force application apparatus to described top steel plate force, described top steel plate is moved towards the direction away from described second coagulation earthen platform, the width at described expansion joint increases, and the width of described preset slot reduces.Thus, test platform truly reflects the actual performance of bridge extension joint, and can change expansion joint width, simulates multiple test cases, make test findings more accurately, have more ubiquity.
In some embodiments, described foundation comprises cushion cap and is arranged on many prefabricated piles bottom described cushion cap, described bottom steel plate is laid on described cushion cap, and described second coagulation earthen platform, described first supplements pavement concrete platform and the described second supplementary pavement concrete platform is cast on described cushion cap.Thus, form stable entirety, be more conducive to bearing test platform upper load and test vehicle load.
In some embodiments, described force application apparatus comprises two the first lifting jack of two edges being arranged on side in described bottom steel plate, is arranged on two the second lifting jack of two edges of opposite side in described bottom steel plate, the top cap of described first lifting jack abuts with the side of steel plate side, described top, by steel plate force in top described in described first jack pair, the width at described expansion joint is reduced; The top cap of described second lifting jack abuts with the side of described top steel plate opposite side, by steel plate force in top described in described second jack pair, the width at described expansion joint is increased.Thus, realized the change of expansion joint width by lifting jack, structure is simple, construction and easy to operate.
In some embodiments, be fixedly connected with the second fastening assembly by the first fastening assembly between described top steel plate and described bottom steel plate, described first fastening assembly comprises: be arranged on the first fluting of steel plate both sides, described top, be arranged on the reserved screw of multiple first in the described bottom steel plate corresponding with described first slotting position, with the described first reserved screw with the use of the first bolt and with described first bolt with the use of the first nut; Described second fastening assembly comprises: be arranged in the steel plate of described top three the second fluting arranged in parallel, be arranged on the reserved screw of multiple second in the described bottom steel plate corresponding with described second slotting position, with the described second reserved screw with the use of the second bolt and with described second bolt with the use of the second nut; Described pavement concrete platform is also provided with the through slot corresponding with described second slotting position.Thus, no matter make top steel plate and bottom steel plate at both sides or middle part, transverse direction or longitudinal all compact siro spinning technology, can not be separated, reduce the vibration of platform self when test vehicle crosses, the accuracy of warranty test result.
In some embodiments, the distance between the described through slot in two, outside is less than the wheel clear distance of test vehicle.Thus, when vehicle crosses, can through slot be avoided, ensure the accuracy of test result.
In some embodiments, be connected by shearing connecting piece between described cushion cap with described bottom steel plate, between described top steel plate with described pavement concrete platform.Thereby, it is possible to make their compact siro spinning technology, form an entirety.
In some embodiments, the wide variety scope at described expansion joint is 0 ~ 16cm, and the width at described expansion joint becomes in the process of 16cm from 0, and the width of described preset slot becomes 0 from 16cm accordingly.Thus, change with the expansion joint width of actual bridge and be consistent, the expansion joint width change of actual bridge can be simulated exactly.
In some embodiments, the first expansion joint module that described Part I component is 1m by three length is formed along width of roadway direction close-packed arrays, and the second expansion joint module close-packed arrays being 1m by three length that described Part II component is corresponding is formed.Thus, identical with the structure of the expansion joint component of actual bridge, can accurately reflect its stuctures and properties.
In some embodiments, waterproof awning is covered with above described test platform, described waterproof awning is fixedly connected with by the road surface of awning base station with described cushion cap periphery, it is 2 ~ 5 ° of dip plane that the end face of described waterproof awning is arranged to angle of inclination, and the minimum altitude of described waterproof awning is greater than the height of test vehicle.Thus, the water bodys such as rainwater can be made to slide along the end face of waterproof awning to be discharged to outside test platform, reduce water body to a certain extent to the adverse effect of test platform, and the height of waterproof awning is greater than the height of test vehicle, can not affect the normal pass of test vehicle.
A construction method for above-mentioned variable-width bridge expanssion joint test platform, is characterized in that, comprise the following steps:
1. drive piles: dig out on road surface installation test platform the foundation ditch of applicable size, with navvy, the prefabricated pile of four long 3m is vertically pressed in dug foundation ditch;
2. pour into a mould cushion cap: in prefabricated pile stake, be reserved with anchor bar, be furnished with in length and breadth to steel bar stress bottom cushion cap, anchor bar is goed deep into cushion cap in length and breadth in steel bar stress, make cushion cap and prefabricated pile form entirety;
3. steel plate is installed: above cushion cap, lay bottom steel plate, connects bottom steel plate and cushion cap with enough shearing connecting pieces, make them form an entirety; Top steel plate is placed above bottom steel plate, and the first bolt is screwed in the first reserved screw of bottom steel plate both sides, second bolt is screwed in the second reserved screw of bottom steel plate, again with tubular key by the first nut and the first bolt tightening, by the second nut and the second bolt tightening, make top steel plate and bottom steel plate compact siro spinning technology; Four edges in bottom steel plate are installed for making top steel plate relative to the lifting jack of bottom steel plate movement, and its top cap abuts with steel plate side, top;
4. deposit concrete platform: the shearing connecting piece welding sufficient amount above the steel plate of top, and cast leaves the pavement concrete platform of three through slots, be close to pavement concrete platform and pour into a mould the first coagulation earthen platform, above cushion cap, pour into a mould the second coagulation earthen platform near bottom steel plate;
5. expansion joint component is installed: above the first coagulation earthen platform and the second coagulation earthen platform, install Part I component and Part II component respectively, the distance between Part I component and Part II component is the width at expansion joint;
6. teeming pavement concrete: in order to make the smooth drive-by test platform of test vehicle, teeming pavement concrete in the foundation ditch dug, on cushion cap and between road surface and pavement concrete platform, teeming first supplements pavement concrete platform, leave preset slot during teeming and between pavement concrete platform, the width of preset slot and the width sum at expansion joint are 16cm; On cushion cap and between road surface and the second coagulation earthen platform, teeming second supplements pavement concrete platform, and the second supplementary pavement concrete platform and the second coagulation earthen platform are fitted tightly;
7. road surface overlap joint steel plate is installed: laying above preset slot and road surface overlap joint steel plate is installed, crossing smoothly for making test vehicle;
8. repair road surface, complete construction.
Compared with prior art, the invention has the advantages that:
(1) force application apparatus is passed through, top steel plate and bottom steel plate can realize relative movement, thus realize the change of expansion joint width, simulate the expansion joint width change that actual bridge causes because of expanded by heating or chance cold events, in the present invention, the variation range of expansion joint width is 0 ~ 16mm, this changes with the expansion joint width of actual bridge and is consistent, and therefore, test platform of the present invention can simulate the expansion joint width change of actual bridge exactly.
(2) by the concrete of expansion joint component surrounding is chiseled out, take out whole expansion joint component and reinstall the mode of new expansion joint component, the object changing expansion joint type can be reached, realize testing polytype expansion joint, make test findings have ubiquity.
(3) by friction type high strength bolt, top steel plate and bottom steel plate are fixedly secured, by shearing connecting piece, top steel plate and pavement concrete platform, bottom steel plate and cushion cap are linked together, thus make whole test platform form an entirety of combining closely, when vehicle crosses, platform can not produce too large vibration thus affect the accuracy of the test results such as dynamic response.
(4) foundation adopts pile foundation, and load-bearing capacity is high, and non-deformability is strong, can meet the installation accuracy requirement that expansion joint is harsher.
(5) whole test platform construction is simple, quick, cost is low, without the need to the admission fee that professional construction machinery is expensive except navvy, practical.
(6) can polytype sensor such as layout sound, electricity, light quickly and easily on test platform of the present invention, for testing the expansion joint dynamic responses such as displacement, strain, acceleration, acoustic pressure, research for expanded joint structure intensity, fatigue, damage, structure optimization provides basic test data, contributes to the accuracy verifying relevant theoretical analysis method.
Accompanying drawing explanation
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 structural representation of the bottom steel plate of one embodiment of the invention, top steel plate and pavement concrete platform part;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the structural representation that one embodiment of the invention increases waterproof awning.
Embodiment
Below in conjunction with accompanying drawing, a kind of variable-width bridge expanssion joint of the present invention test platform is described in further detail, but not as a limitation of the invention.
Embodiment 1
As Figure 1-Figure 4, a kind of variable-width bridge expanssion joint test platform comprises: in bottom and for bearing test platform upper load and test vehicle load foundation, being fixedly layed in the bottom steel plate 3 in foundation, the top steel plate 4 be arranged in bottom steel plate 3, being arranged between bottom steel plate 3 and top steel plate 4 and for making top steel plate 4 relative to force application apparatus, the expansion joint component of bottom steel plate 3 movement.
Foundation is upper load for bearing test platform and the non-uniform settling reducing test platform, and in the present embodiment, the many prefabricated piles 1 that foundation comprises cushion cap 2 and is arranged on bottom cushion cap 2, bottom steel plate 3 is laid on cushion cap 2.Prefabricated pile 1 is provided with 4, diameter is 400mm, length is 3m, and the height of cushion cap 2 is 300mm, is furnished with in length and breadth to steel bar stress bottom cushion cap 2, is goed deep into making cushion cap 2 and prefabricated pile 1 form entirety in cushion cap 2 by anchor bar reserved for prefabricated pile 1.Thus, prefabricated pile 1 and cushion cap 2 have good load-bearing capacity and non-deformability, are particularly suitable for the Jiangnan regions construction that Soft Soil Layer is thicker.
Expansion joint component is made up of the Part I component 61 matched and Part II component 71, the top of top steel plate 4 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, the top of cushion cap 2 is cast with the second coagulation earthen platform 7 for installing Part II component 71 near bottom steel plate 3, be expansion joint 72 between Part I component 61 and Part II component 71, the distance between Part I component 61 and Part II component 71 is the width at expansion joint 72.
Teeming has and first supplements pavement concrete platform 8 in order to what make test vehicle normally cross on cushion cap 2 and between road surface and pavement concrete platform 5, first supplement be provided with preset slot 53 between pavement concrete platform 8 and pavement concrete platform 5, the top of preset slot 53 is coated with the road surface overlap joint steel plate 52 for making test vehicle normally cross, and teeming closely has and second supplements pavement concrete platform 9 in order to what make test vehicle normally cross on cushion cap 2 and between road surface and the second coagulation earthen platform 7.First of teeming supplements between the supplementary pavement concrete platform 9 of pavement concrete platform 8, second, cushion cap 2 and forms an entirety closely.
In the present embodiment, force application apparatus comprises two the first lifting jack 31 of two edges being arranged on side in bottom steel plate 3, is arranged on two the second lifting jack 32 of two edges of opposite side in bottom steel plate 3.The top cap of the first lifting jack 31 abuts with the side of top steel plate 4 side, exerted a force by the first lifting jack 31 pairs of top steel plates 4, top steel plate 4 is moved towards the direction near the second coagulation earthen platform 7, the width at expansion joint 72 is reduced, the width of preset slot 53 increases.The top cap of the second lifting jack 32 abuts with the side of top steel plate opposite side, exerted a force by the second lifting jack 32 pairs of top steel plates 4, top steel plate 4 is moved towards the direction away from the second coagulation earthen platform 7, the width at expansion joint 72 is increased, the width of preset slot 53 reduces.In the present embodiment, the wide variety scope at expansion joint 72 is 0 ~ 16cm, and the width at expansion joint 72 becomes in the process of 16cm from 0, and the width of preset slot 53 becomes 0 from 16cm accordingly.Accordingly, road surface overlap joint steel plate 52 has different width dimensions, so that after expansion joint 72 width changes, the road surface overlap joint steel plate 52 changing suitable width size is laid on above preset slot 53 and connects road surface, both sides.
As shown in Figure 4, in the present embodiment, test platform also comprises: for the first fastening assembly and second fastening assembly of fixing top steel plate 4 and bottom steel plate 3.First fastening assembly comprises: be arranged on through first fluting 41 of top steel plate 4 both sides, the multiple first reserved screw be arranged in the corresponding bottom steel plate 3 in 41 positions of slot with first, to reserve with first screw with the use of the first bolt and with the first bolt with the use of the first nut 42, in the present embodiment, the first bolt is frictional high-strength bolts.Second fastening assembly comprises: be arranged in top steel plate 4 three the second fluting arranged in parallel, be arranged on the reserved screw of multiple second in the bottom steel plate 3 corresponding with the second slotting position, with the second reserved screw with the use of the second bolt 54 and with the second bolt with the use of the second nut, in the present embodiment, the second bolt 54 is frictional high-strength bolts.Pavement concrete platform 5 is also provided with the through slot 51 corresponding with the second slotting position.The effect arranging the first fastening assembly and the second fastening assembly is: make top steel plate 4 and bottom steel plate 3 at both sides and middle part, horizontal and vertical equal compact siro spinning technology, can not be separated, reduce the vibration of platform self when test vehicle crosses, the accuracy of warranty test result.The effect arranging through slot 51 is: after mobile top steel plate 4, for the second nut and the second bolt 54 are tightened reserved operating space by tubular key.Wherein, the distance between two through slots 51 in outside is less than the wheel clear distance of test vehicle, thus, can avoid through slot 51 when vehicle crosses, and ensures the accuracy of test result.
In the present embodiment, be connected by enough shearing connecting pieces between cushion cap 2 with bottom steel plate 3, between top steel plate 4 with pavement concrete platform 5, to become an entirety.
Expansion joint component is made up of the Part I component 61 matched and Part II component 71, the first expansion joint module that Part I component 61 is 1m by three length is formed along the Width close-packed arrays on road surface, and the second expansion joint module close-packed arrays being 1m by three length of Part II component 71 correspondence is formed.The structure of expansion joint component is identical with the expansion joint structure that actual bridge uses, and therefore, the test findings that the present invention obtains truly can reflect the actual performance of bridge extension joint, and test findings is comparatively accurate.If the length of test platform is identical with realistic bridges beam length, the cost of whole test platform manufacture is higher on the one hand, and difficulty of construction is larger; The function of conversion expansion joint width is not easy to realize on the other hand.Therefore, in the present embodiment, consider for economic and practical angle, getting experiment porch length along width of roadway direction is 3.4m, installs 3 the first expansion joint modules and the second expansion joint module respectively, and respectively stays the operating space of 0.2m in component both sides, expansion joint.
The present invention can convert expansion joint type, and such as conventional modulus type expansion joint, the board-like expansion joint of comb etc. all can be applicable to this test platform.
As shown in Figure 5, in the present embodiment, waterproof awning 10 is also covered with above test platform, waterproof awning 10 is fixedly connected with by the road surface of awning base station 101 with cushion cap 2 periphery, the end face 102 of waterproof awning 10 is arranged to the dip plane that angle of inclination is 5 degree, the minimum altitude of waterproof awning 10 is greater than the height of test vehicle, and in the present embodiment, the minimum altitude of waterproof awning 10 is 5m.Thus, waterproof awning 10 can make the water bodys such as rainwater slide along end face 102 to be discharged to outside test platform, reduce water body to a certain extent to the adverse effect of test platform, and the height of waterproof awning 10 arranges the height being greater than test vehicle, can not affect the normal pass of test vehicle.
Below the construction method of a kind of variable-width bridge expanssion joint test platform of the present invention is described in further detail, but not as a limitation of the invention.
Embodiment 2
The construction method of a kind of variable-width bridge expanssion joint test platform of the present invention, comprises the following steps:
1. drive piles: dig out on road surface installation test platform the foundation ditch of applicable size, the prefabricated pile 1 of four long 3m is vertically pressed in the foundation ditch dug with navvy.Do not need to use ram engine to construct, just can prefabricated pile 1 is pressed in foundation ditch with navvy, save construction cost.
2. pour into a mould cushion cap 2: in prefabricated pile 1, be reserved with anchor bar, be furnished with bottom cushion cap 2 in length and breadth to steel bar stress, anchor bar is goed deep into cushion cap 2 in length and breadth in steel bar stress, make cushion cap 2 and prefabricated pile 1 form entirety.
3. steel plate is installed: above cushion cap 2, lay bottom steel plate 3, connects bottom steel plate 3 and cushion cap 2 with enough shearing connecting pieces, make them form an entirety; Top steel plate 4 is placed above bottom steel plate 3, and the first bolt is screwed in the first reserved screw of bottom steel plate 3 both sides, second bolt is screwed in the second reserved screw of bottom steel plate 3, again with tubular key by the first nut 42 and the first bolt tightening, second nut and the second bolt 54 are tightened, makes top steel plate 4 and bottom steel plate 3 compact siro spinning technology; Four edges in bottom steel plate 3 are installed for making top steel plate 4 relative to the first lifting jack 31 and the second lifting jack 32 of bottom steel plate 3 movement, and its top cap abuts with top steel plate 4 side.
4. deposit concrete platform: the shearing connecting piece welding sufficient amount above top steel plate 4, and pour into a mould pavement concrete platform 5, be close to pavement concrete platform 5 and pour into a mould the first coagulation earthen platform 6, above cushion cap 2, pour into a mould the second coagulation earthen platform 7 near bottom steel plate 3.
5. expansion joint component is installed: above the first coagulation earthen platform 6 and the second coagulation earthen platform 7, install Part I component 61 and Part II component 71 respectively, the distance between Part I component 61 and Part II component 71 is the width at expansion joint 72.
6. teeming pavement concrete: in order to make the smooth drive-by test platform of test vehicle, teeming pavement concrete in the foundation ditch dug, on cushion cap 2 and between road surface and pavement concrete platform 5, teeming first supplements pavement concrete platform 8, leave preset slot 53 during teeming and between pavement concrete platform 5, the width of preset slot 53 and the width sum at expansion joint 72 are 16cm; On cushion cap 2 and between road surface and the second coagulation earthen platform 7, teeming second supplements pavement concrete platform 9, and the second supplementary pavement concrete platform 9 and the second coagulation earthen platform 7 are fitted tightly.
7. road surface overlap joint steel plate 52 is installed: laying above preset slot 53 and road surface overlap joint steel plate 52 is installed, crossing smoothly for making test vehicle.
8. repair road surface, complete construction.
When needing the width converting expansion joint 72, road surface overlap joint steel plate 52 is taken out, tubular key is used the first nut 42 and the second nut to be unscrewed, exerted a force by the first lifting jack 31 or the second lifting jack 32 and top steel plate 4 moved relative to bottom steel plate 3, pavement concrete platform 5, the first coagulation earthen platform 6 be fixedly connected with top steel plate 4 thus and the Part I component 61 of top thereof all along with top steel plate 4 moves, thus reach the object of the width at conversion expansion joint 72.After the width at conversion expansion joint 72, use tubular key by the first nut 42 and the first bolt tightening, the second nut and the second bolt 54 are tightened, 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 expansion joint component replaced by needs, by chiseling out the concrete of expansion joint component surrounding, namely the first coagulation earthen platform 7, coagulation earthen platform 6, second, part pavement concrete platform 5 and part second supplement pavement concrete platform 9, whole expansion joint component is taken out, and reinstalls new expansion joint component.The function changing expansion joint type can be realized thus more economically.
In some embodiments, after test platform installation, waterproof awning 10 can be installed.First, around four turnings of cushion cap 2, install four awning base stations 101, be then arranged on awning base station 101 by waterproof awning 10, waterproof awning 10 is located at above test platform.Repair road surface after waterproof awning 10 installation, make road surface keep smooth, thus test vehicle can pass through smoothly.
It should be noted that; the foregoing is only preferred embodiment of the present invention; not thereby limit scope of patent protection of the present invention, the present invention can also carry out the improvement of materials and structures to the structure of above-mentioned various parts, or adopts technically equivalent ones to replace.Therefore the equivalent structure change that all utilizations instructions of the present invention and diagramatic content are done, or directly or indirectly apply to other correlative technology fields and be all in like manner all contained in the scope that the present invention contains.
Claims (10)
1. a variable-width bridge expanssion joint test platform, it is characterized in that, comprise in bottom for carry described test platform upper load and test vehicle load foundation, being fixedly layed in the bottom steel plate above described foundation, the top steel plate be arranged in described bottom steel plate, being arranged between described bottom steel plate and described top steel plate and for making described top steel plate relative to force application apparatus, the expansion joint component of described bottom steel plate movement
Described expansion joint component is made up of the Part I component matched and Part II component, the top of described top steel plate is cast with the pavement concrete platform that is close together and the first coagulation earthen platform for installing described Part I component, the top of described foundation is cast with the second coagulation earthen platform for installing described Part II component near described bottom steel plate, distance between described Part I component and described Part II component is the width at expansion joint, teeming has and first supplements pavement concrete platform in order to what make test vehicle normally cross above described foundation and between road surface and described pavement concrete platform, described first supplement be provided with preset slot between pavement concrete platform and described pavement concrete platform, the top of described preset slot is coated with the road surface overlap joint steel plate for making test vehicle normally cross, closely teeming has and second supplements pavement concrete platform in order to what make test vehicle normally cross above described foundation and between road surface and described second coagulation earthen platform
By described force application apparatus to described top steel plate force, described top steel plate is moved towards the direction near described second coagulation earthen platform, the width at described expansion joint reduces, and the width of described preset slot increases; By described force application apparatus to described top steel plate force, described top steel plate is moved towards the direction away from described second coagulation earthen platform, the width at described expansion joint increases, and the width of described preset slot reduces.
2. a kind of variable-width bridge expanssion joint test platform as claimed in claim 1, it is characterized in that, described foundation comprises cushion cap and is arranged on many prefabricated piles bottom described cushion cap, described bottom steel plate is laid on described cushion cap, and described second coagulation earthen platform, described first supplements pavement concrete platform and the described second supplementary pavement concrete platform is cast on described cushion cap.
3. a kind of variable-width bridge expanssion joint test platform as claimed in claim 2, it is characterized in that, described force application apparatus comprises two the first lifting jack of two edges being arranged on side in described bottom steel plate, is arranged on two the second lifting jack of two edges of opposite side in described bottom steel plate, the top cap of described first lifting jack abuts with the side of steel plate side, described top, by steel plate force in top described in described first jack pair, the width at described expansion joint is reduced; The top cap of described second lifting jack abuts with the side of described top steel plate opposite side, by steel plate force in top described in described second jack pair, the width at described expansion joint is increased.
4. a kind of variable-width bridge expanssion joint test platform as claimed in claim 3, it is characterized in that, be fixedly connected with the second fastening assembly by the first fastening assembly between described top steel plate and described bottom steel plate, described first fastening assembly comprises: be arranged on the first fluting of steel plate both sides, described top, be arranged on the reserved screw of multiple first in the described bottom steel plate corresponding with described first slotting position, with the described first reserved screw with the use of the first bolt and with described first bolt with the use of the first nut; Described second fastening assembly comprises: be arranged in the steel plate of described top three the second fluting arranged in parallel, be arranged on the reserved screw of multiple second in the described bottom steel plate corresponding with described second slotting position, with the described second reserved screw with the use of the second bolt and with described second bolt with the use of the second nut; Described pavement concrete platform is also provided with the through slot corresponding with described second slotting position.
5. a kind of variable-width bridge expanssion joint test platform as claimed in claim 4, is characterized in that, the distance between the described through slot in two, outside 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, be is characterized in that, be connected between described cushion cap with described bottom steel plate, between described top steel plate with described 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 characterized in that, the wide variety scope at described expansion joint is 0 ~ 16cm, and the width at described expansion joint becomes in the process of 16cm from 0, and the width of described preset slot becomes 0 from 16cm accordingly.
8. a kind of variable-width bridge expanssion joint test platform as claimed in claim 7, it is characterized in that, the first expansion joint module that described Part I component is 1m by three length is formed along width of roadway direction close-packed arrays, and the second expansion joint module close-packed arrays being 1m by three length that described Part II component is corresponding is formed.
9. a kind of variable-width bridge expanssion joint test platform as claimed in claim 8, it is characterized in that, waterproof awning is covered with above described test platform, described waterproof awning is fixedly connected with by the road surface of awning base station with described cushion cap periphery, it is 2 ~ 5 ° of dip plane that the end face of described waterproof awning is arranged to angle of inclination, and the minimum altitude of described waterproof awning is greater than the height of test vehicle.
10. a construction method for variable-width bridge expanssion joint test platform according to claim 9, is characterized in that, comprise the following steps:
1. drive piles: dig out on road surface installation test platform the foundation ditch of applicable size, with navvy, the prefabricated pile of four long 3m is vertically pressed in dug foundation ditch;
2. pour into a mould cushion cap: in prefabricated pile stake, be reserved with anchor bar, be furnished with in length and breadth to steel bar stress bottom cushion cap, anchor bar is goed deep into cushion cap in length and breadth in steel bar stress, make cushion cap and prefabricated pile form entirety;
3. steel plate is installed: above cushion cap, lay bottom steel plate, connects bottom steel plate and cushion cap with enough shearing connecting pieces, make them form an entirety; Top steel plate is placed above bottom steel plate, and the first bolt is screwed in the first reserved screw of bottom steel plate both sides, second bolt is screwed in the second reserved screw of bottom steel plate, again with tubular key by the first nut and the first bolt tightening, by the second nut and the second bolt tightening, make top steel plate and bottom steel plate compact siro spinning technology; Four edges in bottom steel plate are installed for making top steel plate relative to the lifting jack of bottom steel plate movement, and its top cap abuts with steel plate side, top;
4. deposit concrete platform: the shearing connecting piece welding sufficient amount above the steel plate of top, and cast leaves the pavement concrete platform of three through slots, be close to pavement concrete platform and pour into a mould the first coagulation earthen platform, above cushion cap, pour into a mould the second coagulation earthen platform near bottom steel plate;
5. expansion joint component is installed: above the first coagulation earthen platform and the second coagulation earthen platform, install Part I component and Part II component respectively, the distance between Part I component and Part II component is the width at expansion joint;
6. teeming pavement concrete: in order to make the smooth drive-by test platform of test vehicle, teeming pavement concrete in the foundation ditch dug, on cushion cap and between road surface and pavement concrete platform, teeming first supplements pavement concrete platform, leave preset slot during teeming and between pavement concrete platform, the width of preset slot and the width sum at expansion joint are 16cm; On cushion cap and between road surface and the second coagulation earthen platform, teeming second supplements pavement concrete platform, and the second supplementary pavement concrete platform and the second coagulation earthen platform are fitted tightly;
7. road surface overlap joint steel plate is installed: laying above preset slot and road surface overlap joint steel plate is installed, crossing smoothly for making test vehicle;
8. repair road surface, complete construction.
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