CN109577190B

CN109577190B - Prefabricated bridge plate

Info

Publication number: CN109577190B
Application number: CN201811389038.7A
Authority: CN
Inventors: 璁稿嘲; 许峰
Original assignee: Individual
Current assignee: Hubei Macheng Hongji Concrete Co ltd
Priority date: 2018-11-21
Filing date: 2018-11-21
Publication date: 2020-11-10
Anticipated expiration: 2038-11-21
Also published as: CN109577190A

Abstract

The invention relates to a bridge plate and discloses a prefabricated bridge plate, which comprises a concrete plate, wherein the concrete in the concrete plate comprises the following components in parts by weight: 388-portions of cement, 100 portions of fly ash, 60 portions of mineral powder, 682-portions of sand, 686 portions of stone, 1030 portions of water, 158-portions of water and 162 portions of additive, and 0.9 percent of additive; concrete slab has pour skeleton mechanism in, and skeleton mechanism includes steel reinforcement framework, reinforcing bar otter board, and steel reinforcement framework includes horizontal reinforcing bar and vertical reinforcing bar, and vertical reinforcing bar is including the left end portion and the right-hand member portion of buckling into the intermediate part of N shape and outwards bending the formation horizontally by N shape both ends, and left end portion and right-hand member portion all arrange along concrete slab's width direction. The cohesiveness of the concrete is greatly improved, the problems of easy pipe blockage and difficult pumping of concrete during construction are solved, and the prepared bridge plate has high strength and flatness.

Description

Prefabricated bridge plate

Technical Field

The invention relates to a bridge plate, in particular to a prefabricated bridge plate.

Background

The prefabricated bridge plate is generally of a reinforced concrete structure, but the existing prefabricated bridge plate of the reinforced concrete structure has some defects, such as the problems of easy pipe blockage and difficult pumping of concrete pumping in the construction process. The prefabricated bridge plate structure has low strength and the bearing capacity needs to be enhanced.

Disclosure of Invention

The invention provides a prefabricated bridge plate, aiming at the problems of the prefabricated bridge plate in the prior art.

In order to solve the technical problem, the invention is solved by the following technical scheme:

a precast bridge plate comprises a concrete plate, wherein the concrete in the concrete plate comprises the following components in parts by weight: 388-portions of cement, 100 portions of fly ash, 60 portions of mineral powder, 682-portions of sand, 686 portions of stone, 1030 portions of water, 158-portions of water and 162 portions of additive, and 0.9 percent of additive; therefore, the cohesiveness of the concrete is greatly improved, and the problems of easy pipe blockage and difficult pumping of concrete during construction are avoided.

A framework mechanism is poured in the concrete slab and comprises a steel bar framework, steel bar net plates which are horizontally arranged and are arranged in the length direction of the concrete are fixed on the upper end face and the lower end face of the steel bar framework, the upper steel bar net plate and the lower steel bar net plate are parallel to each other, the steel bar framework comprises a cuboid framework, the framework comprises four transverse steel bars arranged in the length direction of the concrete and end connecting pieces which are respectively arranged at the two ends of the transverse steel bars and are used for connecting the four transverse steel bars, a plurality of longitudinal steel bars which are uniformly arranged are wound on the transverse steel bars in the length direction of the transverse steel bars, each longitudinal steel bar comprises a middle part bent into an N shape and a left end part and a right end part which are arranged at the two ends of the middle part and extend outwards and horizontally, the left end part and the right end part are both arranged in the width direction of the concrete slab, two transverse steel bars which are arranged in a, and the other two diagonally arranged transverse steel bars are respectively welded on the N-shaped vertical side surface of the middle part. The structural style of the framework mechanism in the concrete slab enables the framework to have a certain moving space in the length direction of the concrete slab, so that the framework can adapt to the transverse deformation of concrete in pouring, the whole steel reinforcement framework can adapt to the deformation of the concrete, the stress redistribution phenomenon of a concrete shrinkage crack and a composite structure is reduced, the pouring of the concrete can be more uniform and smoother, the surface unevenness caused by too much or too little local concrete of a prefabricated bridge plate is reduced, and the strength is not uniform.

Preferably, the additive comprises 40% of water repellent, 30% of rust inhibitor and 30% of preservative.

Preferably, 8 to 12 parts of naphthalene sulfonic acid formaldehyde condensate, 75 to 80 parts of calcium sulfate expanding agent, 0.0001 part of sodium dodecyl benzene sulfonate, 0.06 part of organic silicon and 15 parts of silica fume. Tests show that the water-proofing agent added with the water-proofing agent can make the concrete have an anti-permeability grade of more than P20, and compared with general concrete, the water-reducing rate of the concrete added with the water-proofing agent can be up to more than 16%, the bleeding rate is more than 60%, the penetration height ratio is more than 30%, the water absorption ratio is more than 50%, and the 28-day compressive strength ratio is more than 130%.

As preferred, steel reinforcement framework includes at least two, two steel reinforcement framework end to end, the end connection spare at steel reinforcement framework both ends is rectangle end plate and rectangular frame respectively, be fixed with the cross link on the rectangle end plate, the cross link is including fixing the dwang at rectangle end plate central part, the cover is equipped with the rotating sleeve on the dwang, be connected with four evenly arranged's connecting rod on the lateral wall of rotating sleeve, the tip of connecting rod is buckled towards the dwang axis and is formed coupling hook portion, two adjacent steel reinforcement frameworks pass through coupling hook portion and hook interconnect on rectangular frame. Through the torsion that its adaptation concrete placement of the inside structure of framework of steel reinforcement brought, effectively increase the structural strength and the structural stress adaptability of whole concrete placement board.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of the skeletal mechanism of fig. 1.

Fig. 3 is a schematic structural view of the reinforcing cage of fig. 2.

Fig. 4 is a schematic structural view of a reinforcing cage in embodiment 3 of the present invention.

Fig. 5 is a front view of fig. 3 or fig. 4.

Fig. 6 is a schematic view showing the structure of the cross-shaped connection frame of fig. 5.

Fig. 7 is a schematic structural view of the net sheet of fig. 1.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-concrete slab, 2-framework mechanism, 3-corrugated steel plate, 11-steel reinforcement framework, 21-steel reinforcement mesh plate, 101-framework, 102-transverse steel reinforcement, 103-end connecting piece, 104-longitudinal steel reinforcement, 105-middle part, 106-left end part, 107-right end part, 108-rectangular end plate, 109-rectangular framework, 110-cross connecting frame, 111-rotating rod, 112-rotating sleeve, 113-connecting rod, 114-connecting hook part, 115-first U-shaped frame, 116-second U-shaped frame, 301-horizontal plane, 302-convex plane, 303-short welding nail and 304-long welding nail.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

A precast bridge plate, as shown in figure 1, comprises a concrete plate 1, wherein the concrete in the concrete plate 1 comprises the following components in parts by weight: 388-portions of cement, 100 portions of fly ash, 60 portions of mineral powder, 682-portions of sand, 686 portions of stone, 1030 portions of water, 158-portions of water and 162 portions of additive, and 0.9 percent of additive; tests prove that the slump of the concrete prepared according to the proportion is 235mm, and the expansion degree is 660mm, so that the cohesiveness of the concrete is greatly improved, and the problems of easy pipe blockage and difficult pumping of concrete during construction are effectively solved.

Wherein the additive comprises 40% of waterproof agent, 30% of rust inhibitor and 30% of preservative. The waterproof agent comprises the following components in parts by mass: 8-12 parts of naphthalene sulfonic acid formaldehyde condensate, 75-80 parts of calcium sulfate expanding agent, 0.0001 part of sodium dodecyl benzene sulfonate, 0.06 part of organic silicon and 15 parts of silica fume. The water-proofing agent added with the water-proofing agent can ensure that the impermeability grade of the concrete 1 is more than P20, compared with the common concrete 1, the water reducing rate of the concrete 1 added with the water-proofing agent can reach more than 16%, the bleeding rate is more than 60%, the penetration height ratio is more than 30%, the water absorption ratio is more than 50%, and the 28-day compressive strength ratio is more than 130%, thereby greatly improving the impermeability and water-proofing performance of the concrete 1.

As shown in fig. 2, 3 and 5-7, in the present embodiment, a framework mechanism 2 is poured into a concrete slab 1, the framework mechanism 2 includes a steel reinforcement framework 11, a steel reinforcement mesh plate 21 horizontally disposed along the length direction of the concrete slab 1 is fixed on both the upper end surface and the lower end surface of the steel reinforcement framework 11, the upper and lower steel reinforcement mesh plates 21 are parallel to each other, the steel reinforcement framework 11 includes a rectangular frame 101, the frame 101 includes four transverse steel reinforcements 102 arranged along the length direction of the concrete slab 1 along the length direction of the transverse steel reinforcements 102 and end connectors 103 respectively arranged at both ends of the transverse steel reinforcements 102 for connecting the four transverse steel reinforcements 102, a plurality of longitudinal steel reinforcements 104 uniformly arranged on the transverse steel reinforcements 102 along the length direction of the transverse steel reinforcements 102 are wound, the longitudinal steel reinforcements 104 include a middle portion 105 bent into an N shape and left and

right end portions

106 and 107 arranged at both ends of the middle portion 105 and extending horizontally outward, the left end portion 106 and the right end portion 107 are arranged along the width direction of the concrete slab 1, two diagonal transverse steel bars 102 of the four transverse steel bars 102 are clamped into an N-shaped included angle of the middle portion 105, and the other two diagonal transverse steel bars 102 are welded to the N-shaped vertical side face of the middle portion 105.

Two upper and lower steel mesh plate 21 in framework mechanism 2 play the first layer intensity strengthening effect to the bridge precast slab, two upper and lower steel mesh plate 21 interact, the concrete contacts earlier with steel mesh plate 21 when pouring, steel mesh plate 21 tiling, make the concrete can contact rather than inside framework mechanism 2 with planar form, and finally also end with planar form, two upper and lower steel mesh plate 21 can make pouring of concrete more even, level and smooth, reduce the face that the local aggregate that prefabricated bridge plate was too much or too little arouses is uneven, uneven scheduling problem of intensity.

The steel reinforcement framework 11 is arranged between the two steel reinforcement mesh plates 21 and is formed by fixedly connecting the transverse steel reinforcements 102 and the longitudinal steel reinforcements 104, wherein the middle parts of the longitudinal steel reinforcements 104 are bent to form an N shape and are wound on the longitudinal steel reinforcements 104, and the transverse steel reinforcements 102 and the longitudinal steel reinforcements 104 are connected in a partially clamped mode, so that the longitudinal steel reinforcements 104 on the framework can have a certain moving space in the length direction of the concrete slab 1, and the transverse deformation of concrete during pouring is adapted, the whole steel reinforcement framework 11 can adapt to the deformation of the concrete, and the stress redistribution phenomena of concrete shrinkage cracks and composite structures are reduced. Meanwhile, the left end part 106 and the right end part 107 of the longitudinal steel bar 104 are arranged along the width direction of the concrete slab 1, so that the structure strengthening effect on the width direction of the precast bridge plate can be further realized, the steel bar frameworks 11 are uniformly distributed in the whole concrete slab 1 in the length direction and the width direction, and the bearing strength of the edge part of the precast bridge plate is greatly improved.

Framework 11 includes at least two in this embodiment, 11 end to end of two frameworks, the end connection 103 at 11 both ends of framework is rectangle end plate 108 and rectangular frame 109 respectively, be fixed with cross link 110 on the rectangle end plate 108, cross link 110 is including fixing the dwang 111 at rectangle end plate 108 central part, the cover is equipped with on the dwang 111 and rotates cover 112, be connected with four evenly arranged's connecting rod 113 on the lateral wall of rotation cover 112, connecting rod 113's tip is bent towards dwang 111 axis and is formed coupling portion 114, two adjacent frameworks 11 hook interconnect on rectangular frame 109 through coupling portion 114. Through designing two at least steel reinforcement frames 11, and through the hookup between the steel reinforcement frame 11, and the junction can make to have certain torsional space between the adjacent steel reinforcement frame 11 through the form of dwang 111 with rotate set 112, with the certain torsion that brings because of pouring impact and the traction that concrete placement top-down flow arouses when the shaping is pour to the adaptation concrete, through the inside structure of itself of steel reinforcement frame 11 its torsion that the adaptation concrete placement brought, effectively increase the structural strength and the structural stress adaptability of whole concrete placement board.

In this embodiment, the two steel mesh plates 21 are fixed with a corrugated steel plate 3 on the outer surface far away from the steel skeleton 11. The steel bar net plate 21 and the corrugated steel plate 3 are welded through welding nails. Reinforcing bar otter board 21 is formed by the crisscross welding of transversely arranged's reinforcing bar and longitudinally arranged's reinforcing bar, the handing-over department of transversely arranged's reinforcing bar and longitudinally arranged's reinforcing bar is fixed with the welding nail, wave form steel sheet 3 is constructed by horizontal plane 301 and the protruding face 302 of arranging in turn and is formed, be equipped with the long welding nail hole of a plurality of evenly arranged on wave form steel sheet 3's the protruding face 302, horizontal plane 301 is equipped with the short welding nail hole of a plurality of evenly arranged, reinforcing bar otter board 21's surface and wave form steel sheet 3's horizontal plane 301 laminating and through short welding nail 303 connection, be connected through long welding nail 304 between reinforcing bar otter board 21 and wave form steel sheet 3.

Add on the lateral surface of reinforcing bar otter board 21 and establish wave form steel sheet 3, realize being connected between wave form steel sheet 3 and reinforcing bar otter board 21 through the form that sets up the fixed welding nail in the articulated department of vertically and horizontally staggered reinforcing bar on reinforcing bar otter board 21, can make the connection between wave form steel sheet 3 and the reinforcing bar otter board 21 very firm, also can further strengthen the structural strength of reinforcing bar otter board 21 self simultaneously. Due to the wave-shaped design of the corrugated steel plate 3, the corrugated steel plate is easier to generate cooperative shrinkage with concrete in the length direction compared with a common flat steel plate, the phenomena of unshelling and stress redistribution caused by shrinkage and creep of a steel structure and the concrete are reduced, and on the other hand, a plurality of rib beams are formed at the wave troughs of the corrugated steel plate 3, so that the corrugated steel plate has good bending resistance, and the structural strength and the bearing capacity of the whole prefabricated bridge plate can be further improved.

The method for manufacturing the prefabricated bridge plate of the embodiment generally comprises the following steps of:

weighing 10 parts of naphthalene sulfonic acid formaldehyde condensate, 78 parts of calcium sulfate expanding agent, 0.0001 part of sodium dodecyl benzene sulfonate, 0.06 part of organic silicon and 15 parts of silica fume according to the mass parts, and uniformly mixing and stirring to obtain the waterproof agent;

step two, preparing an additive, namely weighing 30% of rust inhibitor, 30% of preservative and 40% of waterproofing agent in the step one according to the weight parts;

weighing the following components in parts by weight: 390 parts of cement, 100 parts of fly ash, 60 parts of mineral powder, 684 parts of sand, 1030 parts of stones, 160 parts of water and 0.9% of additive in the second step are poured into a stirrer to be stirred uniformly, and precast concrete is obtained;

step four, pouring a mold: coating a release agent on the surface of the mould, fixing the framework mechanism 2 inside the mould, pouring the precast concrete obtained in the third step into the mould, vibrating the concrete by adopting a vibrating device to be compact, manually troweling the surface of the concrete by adopting a trowel, and finally performing press polishing on the surface of the concrete;

fifthly, performing secondary pressing and plastering before final setting of the concrete, and then performing steam curing on the concrete by adopting a high-temperature steam method;

and step six, demolding and discharging to obtain the prefabricated bridge plate.

Example 2

The difference from embodiment 1 is that the connection between the adjacent steel reinforcement frames 11 in this embodiment further includes another connection form, where the end connectors 103 at the two ends of the steel reinforcement frame 11 are respectively a rectangular end plate 108 and a rectangular frame 109, two first U-shaped frames 115 with different heights and with openings facing the rectangular end plate 108 are fixed on the rectangular end plate 108, two second U-shaped frames 116 which are perpendicular to the first U-shaped frames 115 and with openings facing the rectangular frame 109 are fixed on the rectangular frame 109, and the first U-shaped frames 115 and the second U-shaped frames 116 on the two adjacent steel reinforcement frames 11 are connected in a buckling manner. First U-shaped frame 115 all fixes on framework 11 through the welded mode with second U-shaped frame 116, and distributes in the limit portion of rectangle end plate 108 and rectangular frame 109, staggers each other with the cross-shaped link, realizes the dual connection between the adjacent framework 11.

During the connection, the higher U-shaped frame of height on one of them framework 11 and the lower U-shaped frame lock joint of height on another framework 11, the higher U-shaped frame lock joint of height on the lower U-shaped frame of relative height and another framework 11 form the multiple fastening between the adjacent framework 11, and mutually support between the multiple lock joint, guarantee the stability and the joint strength of connecting. In addition, by adopting the buckling mode, a certain torsional space can be formed between the adjacent steel reinforcement frameworks 11, so that the concrete can be further suitable for certain torsion caused by casting impact and traction caused by the top-down flowing of the poured concrete during pouring and forming, the torsion caused by the poured concrete can be adapted through the self structure in the steel reinforcement frameworks 11, and the structural strength and the structural stress adaptability of the whole concrete pouring plate can be further improved.

Example 3

As shown in fig. 4 and 5, the difference between the two embodiments is that only two first U-shaped frames 115 with different heights and openings facing the rectangular end plate 108 are fixed on the rectangular end plate 108 at the end of the steel reinforcement frame 11 in the embodiment, only two second U-shaped frames 116 with openings facing the rectangular frame 109 and arranged perpendicular to the first U-shaped frames 115 are fixed on the rectangular frame 109, and the first U-shaped frames 115 and the second U-shaped frames 116 on two adjacent steel reinforcement frames 11 are buckled and connected with each other.

In this embodiment, the first U-shaped frame 115 and the second U-shaped frame 116 are separately fastened to each other to connect two adjacent steel frameworks 11.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims

1. A precast bridge panel comprising a concrete panel (1), characterized in that: the concrete in the concrete slab (1) comprises the following components in parts by weight: 388-portions of cement, 100 portions of fly ash, 60 portions of mineral powder, 682-portions of sand, 686 portions of stone, 1030 portions of water, 158-portions of water and 162 portions of additive, and 0.9 percent of additive; concrete slab (1) is internally poured with skeleton mechanism (2), skeleton mechanism (2) includes steel reinforcement framework (11), all be fixed with a length direction that the level was placed on the up end of steel reinforcement framework (11) and all along concrete slab (1) length direction arranged's steel reinforcement otter board (21) down on the terminal surface, two upper and lower steel reinforcement otter board (21) are parallel to each other, steel reinforcement framework (11) is including being rectangular form frame (101), frame (101) include four length direction along concrete slab (1) length direction arranged horizontal reinforcing bar (102) and set up respectively in horizontal reinforcing bar (102) both ends and be used for connecting four tip connecting piece (103) of horizontal reinforcing bar (102), along horizontal reinforcing bar (102) length direction on horizontal reinforcing bar (102) around being equipped with a plurality of evenly arranged vertical reinforcing bar (104), vertical reinforcing bar (104) are including buckling into N shape intermediate part (105) and set up at the both ends of intermediate part (105) and outside left end (106) and the horizontal extension The concrete slab comprises an end portion (107), a left end portion (106) and a right end portion (107) which are arranged along the width direction of the concrete slab (1), two transverse reinforcing steel bars (102) which are arranged diagonally in the four transverse reinforcing steel bars (102) are clamped into an N-shaped included angle of the middle portion (105) respectively, and the other two transverse reinforcing steel bars (102) which are arranged diagonally are welded on the N-shaped vertical side face of the middle portion (105) respectively.

2. A prefabricated bridge panel according to claim 1, wherein: the additive comprises 40% of waterproof agent, 30% of rust inhibitor and 30% of preservative.

3. A prefabricated bridge panel according to claim 2, wherein: the waterproof agent comprises the following components in parts by mass: 8-12 parts of naphthalene sulfonic acid formaldehyde condensate, 75-80 parts of calcium sulfate expanding agent, 0.0001 part of sodium dodecyl benzene sulfonate, 0.06 part of organic silicon and 15 parts of silica fume.

4. A prefabricated bridge panel according to claim 1, wherein: steel bar framework (11) are including at least two, two steel bar framework (11) end to end, end connection spare (103) at steel bar framework (11) both ends are rectangle end plate (108) and rectangular frame (109) respectively, be fixed with cross link (110) on rectangle end plate (108), cross link (110) are including fixing dwang (111) at rectangle end plate (108) central part, the cover is equipped with on dwang (111) and rotates cover (112), be connected with four connecting rod (113) of evenly arranging on the lateral wall of rotation cover (112), the tip of connecting rod (113) is buckled towards dwang (111) axis and is formed coupling hook portion (114), two adjacent steel bar framework (11) are through coupling hook portion (114) interconnect on rectangular frame (109).