CN216193996U - Ultra-shallow buried process structure of comb plate type bridge expansion device - Google Patents

Abstract

The utility model provides a technology structure is buried to ultra shallow of fishback formula bridge telescoping device, includes fixed fishback (4) and activity fishback (7), its characterized in that: the concrete pouring device is characterized in that a plurality of grout overflow holes (5) penetrating through the comb plate are formed in the upper surface of the fixed comb plate (4) and/or the movable comb plate (7), the grout overflow holes (5) can be formed in the upper surface of the dustproof metal plate (6) and the movable telescopic area between the fixed comb plate (4) and the movable comb plate (7), and a concrete pouring area or a concrete pouring area is formed between the left bridge abutment beam end and the fixed comb plate (4) and between the right bridge abutment beam end and the movable comb plate (7) respectively.

Description

Ultra-shallow buried process structure of comb plate type bridge expansion device

Technical Field

The utility model relates to a bridge expansion device, in particular to an ultra-shallow buried process structure of a comb plate type bridge expansion device, and belongs to the technical field of road and bridge engineering.

Background

The bridge expansion device is an important connecting part between bridge beam ends, and the quality and performance of the device directly influence the durability of the whole bridge engineering. In the installation and construction process of the professional sub-package engineering of the bridge expansion device, the quality of concrete has a great influence on the quality of the whole engineering, the hardened concrete has enough strength and durability indexes, the load needs to be borne and the corrosion of the external environment needs to be resisted, and an important index for determining the durability of the concrete is the compactness of the concrete.

When the bridge expansion device is installed, the flatness of the connection between the expansion toothed plate and the bridge floor is also another key factor for determining the service life of the bridge expansion device, according to relevant traffic industry standards, the tolerance range of the flatness of the connection between the bridge expansion device and the bridge floor is required to be +/-1 mm, and vehicle jumping caused by substandard flatness can directly cause impact fatigue of load on the bridge expansion device, so that premature fatigue damage of the bridge expansion device can be accelerated.

The construction of the bridge expansion device is divided according to the concrete pouring sequence process, one method is a post-pouring concrete method, and the other method is a pre-pouring concrete method. The method for casting concrete later is mainly suitable for a modulus type bridge expansion device and a bolt-free integral anchoring type comb plate bridge expansion device, the bridge expansion device is installed firstly, the concrete is cast after the anchoring strength and the flatness requirements are met, a certain shrinkage gap can be caused between the bridge expansion device and the concrete due to the fact that the hardened concrete has a certain shrinkage ratio, and the gap directly influences the later fatigue service life of the bridge expansion device. The concrete pouring method is generally suitable for the bolt anchoring type comb plate bridge expansion device, the basic steps are that the concrete is poured after the anchoring unit of the bridge expansion device is installed, the expansion plate can be installed after the concrete has certain supporting strength, in actual operation, in order to ensure that the compactness of the concrete meets the requirement, only a certain amount of concrete is poured, the expansion plate is installed, in the process of adjusting the screw rod of the expansion plate, the redundant concrete can only overflow from the transition zone area, the transition zone area is located at the position where the expansion plate passes to the asphalt section surface, as the expansion plate has a certain plane area and has certain self weight, the expansion plate can be installed only after the concrete has certain supporting strength, otherwise, the expansion plate is installed too early, the expansion plate can automatically sink and is possibly lower than the elevation, when the concrete has certain supporting strength, the telescopic toothed plates are installed, and redundant concrete is arranged at a position far away from the transition zone, particularly a bridge telescopic device with a seam-crossing structure, the plane area of the fixed comb plate end of the telescopic toothed plate is larger, the flowability of the concrete in an initial setting state is poor, the difficulty of directly overflowing from the transition zone area is larger, the probability is lower, and the installation elevation of the telescopic toothed plates is directly higher than the bridge floor; the less concrete is left, so that the installation elevation of the telescopic toothed plate is directly lower than the bridge floor; the concrete pouring amount can only depend on the air, and the probability that the concrete pouring amount is just not too much is extremely low.

According to the design requirements of the comb plate type bridge expansion device, the concrete compactness needs to meet the strength design requirements, the installation flatness of the expansion plates needs to meet the industrial standard requirements, the practical construction of the comb plate type bridge expansion device in all the existing structural forms is difficult to solve satisfactorily, the structural depth of an installation notch of the existing bridge expansion device is designed to be more than 180 mm, a C50 steel fiber concrete layer with the thickness of more than 80 mm is designed on the surface of a beam body, then an asphalt paving layer with the thickness of 100 mm is designed on the surface of the C50 steel fiber concrete layer, the existing bridge expansion device is installed in the notch with the structural depth of more than 180 mm, the construction bottleneck of the compactness requirement of the concrete and the flatness requirement of the installation of the expansion plates is generally met, the practical operation difficulty is large, the qualified rate of finished products is low, and with the modern bridge paving new technology and new materials, modern bridge new technology of mating formation, the actual design thickness of new material only need 60 millimeters, and the super shallow bridge telescoping device of installing that buries in the notch that the depth of structure only has 60 millimeters, and the structural strength requirement to the bridge telescoping device is higher, and the construction degree of difficulty is bigger, and the volume of concreting is as long as more a little bit or little bit, and the roughness error that directly leads to the installation of flexible pinion rack is very big, and the millicentimetre of losing differs in thousand miles.

In addition, the loss is huge in the packing transportation of traditional fishback formula bridge telescoping device product, because fishback formula bridge telescoping device's self weight is heavier, general packing is packed along the product periphery with the packing area, every packing area can meet four product right angle fractures, the product is hoisting, the loading, midway brake, the discharge in-process, the packing area is cut easily under uncontrollable exogenic action, in case the packing area fracture, will consume a large amount of manpower and materials, it is also extremely unsafe, if adopt wooden case packing, not only with high costs, but also very little environmental protection.

The existing bridge expansion device structure generally has the defects in the installation and construction process, a shrinkage gap exists between the hardened concrete and the bridge expansion device in a post-pouring concrete construction method, the bridge expansion device is easy to generate fatigue damage, the pouring amount of the concrete cannot be accurately controlled by the prior concrete pouring construction method, the proper amount of the poured concrete is difficult to ensure, and the compactness of the concrete and the flatness of the connection between the expansion toothed plate and the bridge deck cannot be simultaneously ensured. The various bridge expansion devices and installation methods disclosed so far only relate to the aspects of anchoring strength, deflection performance, water resistance, dust resistance, installation accuracy and the like of the bridge expansion devices, and no matter a construction method of pouring concrete firstly or a construction method of pouring concrete secondly is adopted, the structural defect that the concrete is in the hidden position of the bridge expansion device cannot be avoided, and the technical problem of hidden construction cannot be effectively solved.

Disclosure of Invention

The utility model aims to solve the technical bottleneck of the existing bridge expansion device, a contraction gap can exist between the hardened concrete and the bridge expansion device, the poured amount of the concrete can not be accurately controlled, the compactness of the concrete and the flatness of the connection between the expansion panel and the bridge floor can not be ensured, the defects and the defects that the compactness of the concrete poured in the expansion joint device is poor, the flatness of the connection between the expansion toothed plate and the bridge floor is not ideal, and the packing belt of a product is easy to shear are caused, and the utility model provides a construction method which has reasonable structure and convenient construction, can not have the contraction gap between the hardened concrete and the bridge expansion device no matter a post-pouring concrete construction method or a pre-pouring concrete construction method, can accurately control the poured amount, can not only ensure the compactness of the concrete, but also ensure the flatness of the connection between the expansion toothed plate and the bridge floor, and the product is packed the ultra-shallow technology structure that buries of a fishback formula bridge telescoping device of simple and convenient firm.

In order to achieve the purpose, the technical solution of the utility model is as follows: the utility model provides a technology structure is buried to ultra shallow of fishback formula bridge telescoping device, includes abutment beam-ends, expansion joint notch, fixed fishback and activity fishback, reserves between two adjacent abutment beam-ends and is provided with expansion joint notch, its characterized in that: the upper surface of the fixed comb plate and/or the movable comb plate is provided with a plurality of pulp overflowing holes penetrating through the comb plate; the bottom surface of the fixed comb plate is provided with a dustproof metal plate, the upper surface of the dustproof metal plate and a movable telescopic area between the fixed comb plate and the movable comb plate are internally provided with slurry overflow holes, or the dustproof metal plate is not provided with the slurry overflow holes; the left side abutment beam end and the fixed comb plate and the right side abutment beam end and the movable comb plate are respectively provided with a concrete pouring area or a concrete pouring area, the concrete pouring area or the concrete pouring area which is positioned on the same side of the opening of the expansion joint is communicated with the grout overflow hole which is positioned on the same side of the opening of the expansion joint, and concrete is poured in the concrete pouring area and the concrete pouring area.

Further, the fixed left anchor unit that is provided with in the abutment beam-ends of expansion joint notch one side, the fixed right anchor unit that is provided with in the abutment beam-ends of expansion joint notch opposite side, the upper surface of left anchor unit is provided with fixed fishback, and the upper surface of right anchor unit is provided with movable fishback, and the upper surface of fixed fishback and movable fishback is flat mutually to fixed fishback passes through broach structure intercrossing interlock with movable fishback in seam crossing department.

Further, fixed fishback and activity fishback are seam formula structure strides, and the bottom surface of fixed fishback is provided with dustproof metal sheet, and dustproof metal sheet level extends to the outward flange of expansion joint notch, and dustproof metal sheet is located left anchor unit, and the upper surface at dustproof metal sheet is shelved to the activity overlap joint part of activity fishback, and fixed fishback and the dustproof metal sheet direct welding who has seted up excessive thick liquid hole become overall structure, perhaps fixed fishback and the whole casting of dustproof metal sheet form and seted up excessive thick liquid hole, excessive thick liquid hole and activity fishback can be processed in step and form, perhaps adopt the casting process to make.

Further, fixed fishback and activity fishback are the seam type structure, and the fixed rubbish separation pinion rack that is provided with on the bottom surface of activity fishback, are provided with dustproof metal sheet under fixed fishback, and the lower surface of rubbish separation pinion rack is shelved on dustproof metal sheet and the partial coincidence, and the excessive thick liquid hole forms with fixed fishback and the synchronous processing of activity fishback, perhaps adopts casting process to make.

Furthermore, the grout overflow holes are circular, oval or polygonal, and the hole shape, size and distance of the grout overflow holes are determined according to the coverage area, the expansion amount and the grout overflow speed of the comb plate and the concrete pouring area.

Further, after the slurry overflow hole is finished, concrete mortar is filled in the slurry overflow hole or columnar metal with the same size as the slurry overflow hole is fixedly filled in the slurry overflow hole.

Furthermore, the fixed comb plate of the seam-crossing structure and the dustproof metal plate provided with the grout overflow hole are anchored and fixed with the abutment through the left anchoring unit, or the fixed comb plate, the dustproof metal plate provided with the grout overflow hole and the left anchoring unit are directly welded and processed into a whole or cast into a whole, and then are anchored and fixed with the abutment; the movable comb plate provided with the slurry overflow hole is anchored and fixed with the abutment through the right anchoring unit, or the movable comb plate provided with the slurry overflow hole and the right anchoring unit are directly welded and processed into a whole or cast into a whole, and then the movable comb plate is anchored and fixed with the abutment.

Furthermore, the fixed comb plate with the slurry overflow hole of the seam-riding type structure is anchored and fixed with the abutment through the left anchoring unit, or the fixed comb plate with the slurry overflow hole and the left anchoring unit are directly welded and processed into a whole or cast into a whole, and then are anchored and fixed with the abutment; the movable comb plate provided with the slurry overflow hole is anchored and fixed with the abutment through the right anchoring unit, or the movable comb plate provided with the slurry overflow hole and the right anchoring unit are directly welded and processed into a whole or cast into a whole, and then the movable comb plate is anchored and fixed with the abutment.

Furthermore, temporary supporting elastic pieces are respectively arranged between the bottom surface of the fixed comb plate and the left anchoring unit and between the movable comb plate and the right anchoring unit.

Further, support the elastic component temporarily and be spring, shell fragment or other elastic support structure, the support intensity that supports the elastic component temporarily only needs to satisfy and can bear the self weight of fixed fishback or activity fishback temporarily to satisfy the condition that the upper surface of fixed fishback and activity fishback is flat mutually with the upper surface of bridge floor asphalt concrete, support the elastic component temporarily simultaneously and can keep the balance of fixed fishback and activity fishback and conveniently adjust its roughness.

The utility model has the beneficial effects that:

1. according to the utility model, the upper surfaces of the left telescopic toothed plate and the right telescopic toothed plate are provided with the plurality of grout overflow holes penetrating through the telescopic toothed plates, redundant concrete poured in a concrete pouring area or a concrete pouring area can conveniently overflow from the grout overflow holes, the grout overflow holes also have an exhaust function in the concrete flowing process, the problem of too much or too little poured concrete is solved ingeniously, and the construction of the ultra-shallow buried expansion joint is particularly convenient.

2. The temporary supporting elastic pieces are respectively arranged between the bottom surfaces of the fixed comb plate and the movable comb plate and the bridge deck surface, and the fixed comb plate and the movable comb plate have certain self weights, so that the supporting force of newly poured concrete is very limited, the operation time is short, the temporary supporting elastic pieces can temporarily support the telescopic comb plate, the flatness of the connection between the fixed comb plate and the bridge deck and the movable comb plate can be flexibly adjusted, and the construction is convenient.

3. The concrete solidified in the grout overflow hole is columnar, after the concrete is solidified in the grout overflow hole, the contact area between the comb plate and the concrete can be increased, the shearing resistance of the comb plate is improved, the fatigue resistance service life of the bridge expansion device is prolonged, meanwhile, the surface of the grout overflow hole is of a concrete structure, the frictional resistance of the concrete structure is far higher than that of the expansion toothed plate made of steel plates, the ground gripping force of an automobile tire can be effectively improved, and the driving safety coefficient is improved.

4. The slurry overflow hole also greatly facilitates the packing of products, the packing belt can be packed only by penetrating the slurry overflow hole when the products are packed, the packing belt is not completely exposed, the situation that the packing belt is collided and sheared in the processes of hoisting, loading, braking in midway and unloading of the products is effectively avoided, the safety performance is improved, the cost is reduced, and in addition, the slurry overflow hole is also convenient for drilling and core-pulling sampling after the installation is finished.

5. The bridge expansion device has a reasonable structure, no contraction gap exists between the hardened concrete and the bridge expansion device, excessive concrete synchronously overflows from the grout overflow hole in the process of adjusting the flatness of the fixed comb plate and the movable comb plate by the pressurizing screw rod by pouring enough mass of concrete, and the screw rod is pressurized by the large-torque pneumatic wrench after the concrete is solidified to compress the contraction gap of the concrete, so that not only can the compactness of the solidified concrete be ensured, but also the flatness of the connection between the expansion panel and the bridge floor can be ensured, and the service life of the bridge expansion device and the driving comfort level are improved.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the seam-spanning bolt anchoring structure of the present invention.

Fig. 2 is a top view of an embodiment of the present invention of a seam-spanning bolt anchoring structure.

Fig. 3 is a schematic structural view of an embodiment of the saddle-stitch bolt anchoring structure of the present invention.

FIG. 4 is a top view of an embodiment of the present invention of a slotted bolt anchoring structure.

Fig. 5 is a schematic structural view of an embodiment of the seam-spanning boltless anchoring structure of the present invention.

FIG. 6 is a top view of an embodiment of the seam-spanning boltless anchoring structure of the present invention.

FIG. 7 is a schematic structural view of an embodiment of the present invention of a straddle type boltless anchoring structure.

FIG. 8 is a top view of an embodiment of the present invention of a straddle type boltless anchoring structure.

In the figure: bridge floor asphalt concrete 1, high-strength concrete 2, left anchoring unit 3, fixed fishback 4, excessive thick liquid hole 5, dustproof metal sheet 6, activity fishback 7, rubbish separation pinion rack 8, support elastic component 9 temporarily, right anchoring unit 10, abutment embedded bar 11, durability elastic support component 12, durability elastic support component spacing groove 13, installation counter bore 14, waterproof rubber slab 15, escape canal 16.

Detailed Description

The utility model is described in further detail below with reference to the following description of the drawings and the detailed description.

Referring to fig. 1 to 8, the ultra-shallow buried process structure of a comb plate type bridge expansion device of the utility model comprises bridge abutment beam ends, expansion joint notches, a fixed comb plate 4 and a movable comb plate 7, wherein an expansion joint notch is reserved between two adjacent bridge abutment beam ends, and the ultra-shallow buried process structure is characterized in that: the upper surfaces of the fixed comb plate 4 and/or the movable comb plate 7 are provided with a plurality of pulp overflowing holes 5 penetrating through the comb plate; a dustproof metal plate 6 is arranged on the bottom surface of the fixed comb plate 4, a pulp overflow hole 5 is formed in the upper surface of the dustproof metal plate 6 and a movable telescopic area between the fixed comb plate 4 and the movable comb plate 7, or the pulp overflow hole 5 is not formed in the dustproof metal plate 6; the left side abutment beam end and fixed fishback 4 and the right side abutment beam end and activity fishback 7 are provided with earlier concreting region or post-cast concrete region respectively, lie in the expansion joint notch with earlier concreting region or post-cast concrete region with same side and lie in the expansion joint notch with the excessive thick liquid hole 5 with same side be linked together, pour the concrete region earlier and post-cast concrete region in pour the concrete.

The fixed left anchor unit 3 that is provided with on the abutment beam-ends of expansion joint notch one side, the fixed right anchor unit 10 that is provided with on the abutment beam-ends of expansion joint notch opposite side, the upper surface of left anchor unit 3 is provided with fixed fishback 4, the upper surface of right anchor unit 10 is provided with movable fishback 7, the upper surface of fixed fishback 4 and activity fishback 7 is flat mutually to fixed fishback 4 passes through broach structure intercrossing interlock with activity fishback 7 in seam crossing department.

Fixed fishback 4 and activity fishback 7 are seam-spanning type structure, the bottom surface of fixed fishback 4 is provided with dustproof metal sheet 6, the outward flange of expansion joint notch is extended to dustproof metal sheet 6 level, and dustproof metal sheet 6 is located left anchor unit 3, the activity overlap joint part of activity fishback 7 is shelved at dustproof metal sheet 6's upper surface, fixed fishback 4 and the dustproof metal sheet 6 who has seted up excessive thick liquid hole 5 directly weld into overall structure, perhaps fixed fishback 4 and the whole casting of dustproof metal sheet 6 form and have seted up excessive thick liquid hole 5, excessive thick liquid hole 5 can be processed with activity fishback 7 in step and form, perhaps adopt the casting process to make.

Fixed fishback 4 and activity fishback 7 are the striding seam formula structure, and the fixed rubbish separation pinion rack 8 that is provided with on the bottom surface of activity fishback 7, are provided with dustproof metal sheet 6 under fixed fishback 4, and the lower surface of rubbish separation pinion rack 8 is shelved on dustproof metal sheet 6 and the partial coincidence, and excessive thick liquid hole 5 forms or adopts the casting process to make with fixed fishback 4 and activity fishback 7 synchronous processing.

The grout overflow holes 5 are circular, oval or polygonal, and the hole shapes, the sizes and the intervals of the grout overflow holes 5 are determined according to the covering area, the expansion amount and the grout overflow speed of the comb plate and a concrete pouring area.

After the slurry overflow of the slurry overflow hole 5 is finished, concrete mortar is filled in the slurry overflow hole 5 or columnar metal with the same size as the slurry overflow hole 5 is fixedly plugged in the slurry overflow hole 5.

The fixed comb plate 4 with the seam crossing structure and the dustproof metal plate 6 with the grout overflow hole 5 are anchored and fixed with the abutment through the left anchoring unit 3, or the fixed comb plate 4, the dustproof metal plate 6 with the grout overflow hole 5 and the left anchoring unit 3 are directly welded and processed into a whole or cast into a whole, and then are anchored and fixed with the abutment; the movable comb plate 7 provided with the grout overflow holes 5 is anchored and fixed with the abutment through the right anchoring unit 10, or the movable comb plate 7 provided with the grout overflow holes 5 and the right anchoring unit 10 are directly welded and processed into a whole or cast into a whole, and then the movable comb plate and the abutment are anchored and fixed.

The fixed comb plate 4 with the grout overflow hole 5 in the seam-riding type structure is anchored and fixed with the abutment through the left anchoring unit 3, or the fixed comb plate 4 with the grout overflow hole 5 and the left anchoring unit 3 are directly welded and processed into a whole or cast into a whole and then anchored and fixed with the abutment; the movable comb plate 7 provided with the grout overflow holes 5 is anchored and fixed with the abutment through the right anchoring unit 10, or the movable comb plate 7 provided with the grout overflow holes 5 and the right anchoring unit 10 are directly welded and processed into a whole or cast into a whole, and then the movable comb plate and the abutment are anchored and fixed.

Temporary supporting elastic pieces 9 are respectively arranged between the bottom surface of the fixed comb plate 4 and the left anchoring unit 3 and between the movable comb plate 7 and the right anchoring unit 10.

Support elastic component 9 temporarily and be spring, shell fragment or other elastic support structure, the support intensity that supports elastic component 9 temporarily only needs to satisfy and can bear the self weight of fixed fishback 4 or activity fishback 7 temporarily to satisfy the condition that the upper surface of fixed fishback 4 and activity fishback 7 is flat mutually with the upper surface of bridge floor asphalt concrete 1, support elastic component 9 temporarily simultaneously and can keep the balance of fixed fishback 4 and activity fishback 7 and conveniently adjust its roughness.

Referring to fig. 1 to 5, the bridge expansion device of the present invention can be installed not only on a steel box girder, but also on a concrete structural girder, and an expansion joint notch is reserved between two adjacent girder ends. Aiming at different beam body structures, at least three applicable scenes are provided, and a bridge expansion device is arranged between two adjacent steel box beams; a bridge expansion device is arranged between the adjacent steel box girder and the concrete structural girder 2; and a bridge expansion device is arranged between two adjacent concrete structural beams. Similarly, expansion joint notches are reserved between two adjacent steel box girders, between the adjacent steel box girders and the concrete structural girders and between the two adjacent concrete structural girders. And high-strength concrete 2 is poured in the area between the bridge deck asphalt concrete 1 and the fixed comb plate 4 and the movable comb plate 7.

The left anchoring unit 3 is fixedly arranged at the bridge abutment beam end on one side of the groove opening of the expansion joint, the right anchoring unit 10 is fixedly arranged at the bridge abutment beam end on the other side of the groove opening of the expansion joint, the left anchoring unit 3 and the right anchoring unit 10 are in frame type steel structures and serve as installation bases of the expansion toothed plate, the expansion toothed plate is machined in a factory, high machining precision is achieved, high-precision assembly of the follow-up expansion toothed plate can be guaranteed, meanwhile, the overall height of the expansion device is enhanced, and bearing capacity is improved. The upper surface of left anchor unit 3 is provided with fixed fishback 4, the upper surface of right anchor unit 10 is provided with movable fishback 7, the upper surface of fixed fishback 4 and movable fishback 7 is flat mutually, and fixed fishback 4 passes through the intercrossing interlock of broach structure with movable fishback 7 in seam crossing, when satisfying flexible gliding between fixed fishback 4 and the movable fishback 7, ride comfort when can also guaranteeing the vehicle to walk through two fishback seams, in order to improve driving comfort.

The bridge expansion device has two structural forms, namely a seam crossing structure and a seam crossing structure. The seam crossing structure is concretely as follows: the bottom surface of fixed fishback 4 is provided with dustproof metal sheet 6, and dustproof metal sheet 6 level extends to the outward flange of expansion joint notch to dustproof metal sheet 6 is located left anchor unit 3, and the activity overlap joint part of activity fishback 7 is shelved at the upper surface of dustproof metal sheet 6. The riding seam type structure is as follows: a garbage separation toothed plate 8 is fixedly arranged on the bottom surface of the movable comb plate 7, a dustproof metal plate 6 is arranged under the fixed comb plate 4, and the lower surface of the garbage separation toothed plate 8 is placed on the dustproof metal plate 6 and partially overlapped. In order to improve the bearing capacity of one end of the movable comb plate 7 close to the fixed comb plate 4, a durable elastic support limiting groove 13 is arranged on a bridge abutment or an anchoring unit right below the overlapped part of the dustproof metal plate 6 and the garbage separation comb plate 8, a durable elastic support 12 is arranged in the durable elastic support limiting groove 13, the lower surface of the dustproof metal plate 6 is placed on the upper end surface of the durable elastic support 12, and elastic support is provided by the durable elastic support limiting groove 13 and the durable elastic support 12.

And a concrete pouring area or a concrete pouring area is arranged between the left bridge abutment beam end and the fixed comb plate 4 and between the right bridge abutment beam end and the movable comb plate 7 respectively, and concrete can be poured in the concrete pouring area and the concrete pouring area. The first concrete pouring area and the later concrete pouring area are the same space area and are only two different construction forms, the first concrete pouring area is formed by pouring concrete to the first concrete pouring area before the telescopic toothed plates are installed, the later concrete pouring area is formed by pouring concrete to the second concrete pouring area after the telescopic toothed plates are installed, the concrete pouring sequence is different, and the structure and performance effects after construction are the same.

The method for casting concrete later is to firstly install the bridge expansion device to meet the requirements of anchoring strength and flatness and then cast concrete, the method for casting concrete firstly is generally only suitable for the comb plate type bridge expansion device, and the basic steps are firstly to install the anchoring unit of the bridge expansion device, then to cast concrete firstly and finally to install the comb plate. The existing bridge expansion device has two prominent technical problems for a long time, firstly, a contraction gap exists between the hardened concrete and the bridge expansion device, the bridge expansion device is easy to generate fatigue damage, and the service life of the bridge expansion device is influenced; secondly, no matter the concrete is poured firstly or the concrete is poured later, the pouring amount can not be accurately controlled, the proper benefit of the poured concrete amount is difficult to ensure, and the compactness of the concrete and the flatness of the connection of the comb plate and the bridge deck can not be ensured. In order to solve the technical problems, the upper surface of the fixed comb plate 4 and/or the movable comb plate 7 is/are skillfully provided with a plurality of grout overflow holes 5 penetrating through the comb plate, and the grout overflow holes 5 are used for enabling redundant concrete poured in a concrete pouring area or a post-pouring concrete area to conveniently overflow from the grout overflow holes 5 after the concrete is poured. The diameter of the grout overflow holes 5 is 50-200 mm, the distance between the adjacent grout overflow holes 11 is 6-12 times of the aperture, and the hole shape, size and distance of the grout overflow holes 5 are determined according to the size of the coverage area, the size of the expansion amount and the grout overflow speed of the comb plate and a concrete pouring area.

Because the mobility of concrete is relatively poor, seted up a plurality of excessive thick liquid holes 5 on the basis of guaranteeing fixed fishback 4 and movable fishback 7 overall structure intensity, guaranteed just so that unnecessary concrete can both outwards spill over from excessive thick liquid hole 5 near in every region, ingenious solution concreting too much or too little problem, especially very convenient to the construction of the expansion joint of super shallow burying. In addition, the concrete that overflows can fill overfall hole 5, and the concrete that solidifies in the overfall hole 5 is the column, can increase the area of contact between fishback and the concrete after the concrete solidifies in overfall hole 5, improves fishback's anti-shear capacity, improves bridge telescoping device's antifatigue life. Moreover, the surface of the concrete in the grout overflow hole 5 is a concrete layer after the concrete is solidified, the frictional resistance of the concrete layer is far higher than that of a comb plate made of steel plates, the grip of an automobile tire can be effectively improved, the vehicle is prevented from skidding, and the driving safety coefficient is improved. In addition, in the process that concrete flows at the lower part of the comb plate, the grout overflow holes 5 can also play the role of exhaust holes and are used for exhausting air, so that favorable conditions are provided for quickly filling a pouring area with concrete.

Excessive thick liquid hole 5 can also greatly make things convenient for the packing of product except that excessive thick liquid and exhaust, in fixed fishback 4 and the 7 transportation of activity fishback, for fixed mated fixed fishback 4 and activity fishback 7 temporarily, can also install fixed connector, packing steel band etc. temporarily in excessive thick liquid hole 5. When the product is packed, the packing belt can be packed only by penetrating the packing belt through the grout overflow hole, and the incomplete part of the packing belt is directly exposed outside, so that the condition that the packing belt is collided and sheared in the processes of hoisting, loading, braking in midway and unloading of the product is effectively avoided, the product is ensured to be intact in the processes of transportation and unloading of the expansion joint product, the cost is reduced, and meanwhile, the safety performance is improved.

The other function of the grout overflow hole 5 is to facilitate the drilling and core-pulling inspection before the inspection and acceptance of the vehicle, after the installation of the traditional comb plate without the grout overflow hole 5 is finished, because the concrete in the hidden area at the lower part of the comb plate can not be drilled and core-pulled for sampling, the grout overflow hole 5 is formed, and the comb plate steel plate with thicker thickness is not covered in the grout overflow hole 5, the drilling and core-pulling sampling is greatly convenient, the core-pulling sampling can be realized only by drilling at the position of the grout overflow hole 5, the convenience and the rapidness are realized, and the sampling hole is plugged by high-strength concrete after the sampling is finished.

After the grout overflow hole 5 is filled with concrete mortar, a columnar metal with the same size as the grout overflow hole 5 can be filled and fixed in the grout overflow hole 5, the columnar metal can be a columnar metal waste left when the grout overflow hole 5 is cut and processed, and the columnar metal waste is filled in the grout overflow hole 5 to be welded and fixed, but the fixing performance of the mode is lower than that of the mode that the concrete is filled in the grout overflow hole 5.

Aiming at the structure of pouring concrete later, in order to ensure that the fixed comb plate 4 and the movable comb plate 7 which are installed firstly can be accurately positioned at the preset height, temporary supporting elastic parts 9 are respectively arranged between the bottom surface of the fixed comb plate 4 and the left anchoring unit 3 and between the movable comb plate 7 and the right anchoring unit 10, and the temporary supporting elastic parts 9 play a supporting role. Support elastic component 9 temporarily and be the spring, shell fragment or other elastic support structure, the support intensity that supports elastic component 9 temporarily only needs to satisfy and can bear the self weight of fixed fishback 4 or activity fishback 7 temporarily to satisfy the condition that the upper surface of fixed fishback 4 and activity fishback 7 is equal to the upper surface of bridge floor asphalt concrete 1, support elastic component 9 temporarily simultaneously and can keep the balance of fixed fishback 4 and activity fishback 7 and conveniently adjust its roughness.

For the seam crossing structure, as the area of the dustproof metal plate 6 is larger, the adverse effect on slurry overflow can be caused, besides slurry overflow holes 5 are formed in the fixed comb plate 4 and the movable comb plate 7, slurry overflow holes 5 are additionally formed in the upper surface of the dustproof metal plate 6 and the movable telescopic area between the fixed comb plate 4 and the movable comb plate 7, the slurry overflow holes 5 penetrate through the dustproof metal plate 6 and are communicated with a concrete pouring area or a concrete pouring area, concrete slurry below the dustproof metal plate 6 can overflow outwards through the slurry overflow holes 5 formed in the tooth spaces, and when the concrete flows and does not overflow from the slurry overflow holes 5, the slurry overflow holes 5 can also serve as exhaust holes and are used for exhausting air in the concrete pouring area or the concrete pouring area.

During the installation construction, to the construction method of pouring concrete earlier, before fixed fishback 4 and activity fishback 7 are placed, and according to the requirement after placing interim support elastic component 9, need pour earlier to pour a certain amount and have certain mobile concrete in the concrete area earlier, height after the concrete upper surface is screeded will be higher than 2 high strength concrete's of design elevation upper surface 3 millimeters-10 millimeters, reserve sufficient surplus for the excessive thick liquid of concrete, because when pressing fixed fishback 4 and activity fishback 7 under the installation, the concrete has partly still to enter into hidden area. To the construction mode of back concreting, after placing fixed fishback 4 and activity fishback 7, and support the back that elastic component 9 effectively supports fixed fishback 4 and activity fishback 7 respectively temporarily, need pour a certain amount and have certain mobile concrete in the concrete region of back concreting, pour until having the concrete thick liquid of continuous stability simultaneously from overflowing in the thick liquid hole 5 and flowing out, clear up the unnecessary concrete thick liquid in fishback plate surface after accomplishing.

The fixed comb plate 4 and the movable comb plate 7 are mounted and fixed in various forms, for a seam-crossing structure, the fixed comb plate 4 and the dustproof metal plate 6 with the grout overflow hole 5 can be anchored and fixed with an abutment through the left anchoring unit 3, the fixed comb plate 4, the dustproof metal plate 6 with the grout overflow hole 5 and the left anchoring unit 3 can be directly welded and processed into a whole, and the fixed comb plate, the dustproof metal plate 6 and the left anchoring unit can be molded in an integral casting mode and then are anchored and fixed with the abutment. The movable comb plate 7 provided with the grout overflow holes 5 can be fixedly anchored with the abutment through the right anchoring unit 10, the movable comb plate 7 provided with the grout overflow holes 5 can also be directly welded and processed with the right anchoring unit 10 into a whole, and the movable comb plate can be molded in an integral casting mode and then fixedly anchored with the abutment.

For the straddle type structure, the fixed comb plate 4 provided with the grout overflow hole 5 can be fixedly anchored with the abutment through the left anchoring unit 3, the fixed comb plate 4 provided with the grout overflow hole 5 can also be directly welded and processed with the left anchoring unit 3 into a whole, and the fixed comb plate can be molded in an integral casting manner and then is fixedly anchored with the abutment. The movable comb plate 7 provided with the grout overflow holes 5 can be fixedly anchored with the abutment through the right anchoring unit 10, the movable comb plate 7 provided with the grout overflow holes 5 can also be directly welded and processed with the right anchoring unit 10 into a whole, and the movable comb plate can be molded in an integral casting mode and then fixedly anchored with the abutment.

In addition, the inside of expansion joint notch and the below that is located fixed fishback 4 and activity fishback 7 are provided with drainage groove 16, and drainage groove 16's cross section is U type structure, and one side of drainage groove 16 is fixed on the mounting of left side beam-ends, and drainage groove 16's opposite side is fixed on the mounting of right side beam-ends, and drainage groove 16 is connected with the drainage funnel that is located the bottom, and drainage groove 16 can collect the rainwater and accept to discharge downwards through drainage funnel.

The above description is provided for the purpose of describing the present invention in more detail with reference to the specific embodiments, and the detailed implementation of the present invention should not be considered as limited to the description, and the simple substitution made by those skilled in the art without departing from the concept of the present invention should be considered as belonging to the protection scope of the present invention.

Claims (10)

1. The utility model provides a technology structure is buried to fishback formula bridge telescoping device's ultra-shallow, includes abutment beam-ends, expansion joint notch, fixed fishback (4) and activity fishback (7), reserves between two adjacent abutment beam-ends and is provided with expansion joint notch, its characterized in that: the upper surfaces of the fixed comb plate (4) and/or the movable comb plate (7) are provided with a plurality of pulp overflowing holes (5) penetrating through the comb plate; a dustproof metal plate (6) is arranged on the bottom surface of the fixed comb plate (4), a pulp overflow hole (5) is formed in the upper surface of the dustproof metal plate (6) and a movable telescopic area between the fixed comb plate (4) and the movable comb plate (7), or the pulp overflow hole (5) is not formed in the dustproof metal plate (6); the left bridge abutment beam end and the fixed comb plate (4) and the right bridge abutment beam end and the movable comb plate (7) are respectively provided with a concrete pouring area or a concrete pouring area, the concrete pouring area or the concrete pouring area on the same side of the opening of the expansion joint is communicated with the grout overflow hole (5) on the same side of the opening of the expansion joint, and concrete is poured in the concrete pouring area and the concrete pouring area.

2. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 1, wherein: the expansion joint comprises an expansion joint notch, and is characterized in that a left anchoring unit (3) is fixedly arranged at the bridge abutment beam end on one side of the expansion joint notch, a right anchoring unit (10) is fixedly arranged at the bridge abutment beam end on the other side of the expansion joint notch, a fixed comb plate (4) is arranged on the upper surface of the left anchoring unit (3), a movable comb plate (7) is arranged on the upper surface of the right anchoring unit (10), the upper surfaces of the fixed comb plate (4) and the movable comb plate (7) are flat, and the fixed comb plate (4) and the movable comb plate (7) are mutually crossed and occluded at a seam through comb tooth structures.

3. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 1, wherein: fixed fishback (4) and activity fishback (7) are for striding seam formula structure, the bottom surface of fixed fishback (4) is provided with dustproof metal sheet (6), dustproof metal sheet (6) level extends to the outward flange of expansion joint notch, and dustproof metal sheet (6) are located left anchor unit (3), the upper surface at dustproof metal sheet (6) is shelved to the activity overlap joint part of activity fishback (7), fixed fishback (4) and dustproof metal sheet (6) direct welding who has seted up excessive thick liquid hole (5) become overall structure, perhaps fixed fishback (4) and dustproof metal sheet (6) whole casting form and have seted up excessive thick liquid hole (5), excessive thick liquid hole (5) can be processed with activity fishback (7) in step and form, or adopt the casting process to make.

4. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 1, wherein: fixed fishback (4) and activity fishback (7) are the formula structure of strideing seam, and the fixed rubbish separation fishback (8) that is provided with on the bottom surface of activity fishback (7), are provided with dustproof metal sheet (6) under fixed fishback (4), and the lower surface of rubbish separation fishback (8) is shelved on dustproof metal sheet (6) and the partial coincidence, and excessive thick liquid hole (5) forms or adopts the casting process to make with fixed fishback (4) and activity fishback (7) synchronous processing.

5. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 1, wherein: the grout overflow holes (5) are circular, oval or polygonal, and the hole shapes, sizes and intervals of the grout overflow holes (5) are determined according to the coverage area, the expansion amount and the grout overflow speed of the comb plate and a concrete pouring area.

6. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 1, wherein: after the slurry overflowing hole (5) is completed, concrete mortar is filled in the slurry overflowing hole (5) or columnar metal with the same size as the slurry overflowing hole (5) is fixedly plugged in the slurry overflowing hole (5).

7. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 1, wherein: the fixed comb plate (4) and the dustproof metal plate (6) provided with the grout overflow hole (5) are anchored and fixed with the abutment through the left anchoring unit (3), or the fixed comb plate (4), the dustproof metal plate (6) provided with the grout overflow hole (5) and the left anchoring unit (3) are directly welded, processed into a whole or cast into a whole, and then anchored and fixed with the abutment; the movable comb plate (7) provided with the grout overflow holes (5) is fixedly anchored with the abutment through the right anchoring unit (10), or the movable comb plate (7) provided with the grout overflow holes (5) and the right anchoring unit (10) are directly welded and processed into a whole or cast into a whole, and then the movable comb plate is fixedly anchored with the abutment.

8. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 1, wherein: the fixed comb plate (4) provided with the grout overflow holes (5) is fixedly anchored with the abutment through the left anchoring unit (3), or the fixed comb plate (4) provided with the grout overflow holes (5) is directly welded with the left anchoring unit (3) to be processed into a whole or cast into a whole, and then is fixedly anchored with the abutment; the movable comb plate (7) provided with the grout overflow holes (5) is fixedly anchored with the abutment through the right anchoring unit (10), or the movable comb plate (7) provided with the grout overflow holes (5) and the right anchoring unit (10) are directly welded and processed into a whole or cast into a whole, and then the movable comb plate is fixedly anchored with the abutment.

9. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 1, wherein: temporary supporting elastic pieces (9) are respectively arranged between the bottom surface of the fixed comb plate (4) and the left anchoring unit (3) and between the movable comb plate (7) and the right anchoring unit (10).

10. The ultra-shallow buried process structure of the comb plate type bridge expansion device of claim 9, wherein: support elastic component (9) temporarily and be spring, shell fragment or elastic support structure, the support intensity that supports elastic component (9) temporarily only need satisfy can bear the self weight of fixed fishback (4) or activity fishback (7) temporarily to satisfy the condition that the upper surface of fixed fishback (4) and activity fishback (7) is flat mutually with the upper surface of bridge floor asphalt concrete (1), support elastic component (9) temporarily simultaneously and can keep the balance of fixed fishback (4) and activity fishback (7) and conveniently adjust its roughness.

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