CN111733697A - Prefabricated Assembled Laminated Panel Construction - Google Patents

Abstract

The invention relates to the technical field of bridge engineering, and discloses a prefabricated and assembled laminated plate structure, comprising a prefabricated bottom plate and a cast-in-place top plate. The direction edge slope is adapted to the width direction edge slope of the inverted trapezoid plate. The prefabricated bottom plate is assembled by the normal trapezoid plate and the inverted trapezoid plate through the edge slope, which can compress the gap between the traditional segment assembly plates to the maximum extent. The prefabricated bridge deck will make the contact between the edge slope joints more and more under the action of its own gravity. Tight and better mechanical performance; the ends of the shear teeth and the shear tooth structure are "cow legs" that can transmit shear force, so that the tension that needs to be transmitted between the prefabricated normal trapezoid plate and the inverted trapezoid plate is converted into the joint. The shear force transmitted between the tooth blocks enables the joint sections of adjacent trapezoidal plates to transmit tensile force to each other.

Description

Prefabricated Assembled Laminated Panel Construction

technical field

The invention relates to the technical field of bridge engineering, in particular to a prefabricated and assembled laminated plate structure.

Background technique

The existing concrete bridge deck construction technology generally adopts the cast-in-place slab or the traditional laminated slab scheme.

The cast-in-place solution is to set up a formwork on the main beam of the bridge, then bind the steel bars, and then pour concrete. The construction speed of this method is slow, the installation and removal of the formwork is time-consuming and labor-intensive, and the quality of the poured concrete on site is not guaranteed.

The traditional laminated board scheme is to design the board into a structure of upper and lower layers. The lower layer is generally made of prefabricated boards. During the construction process, the prefabricated boards are first erected on the main beam of the bridge, and then concrete is poured on the precast boards. Set shear keys or reinforcement to make the upper and lower layers form a whole. This scheme can save the time for erecting the formwork on site, but the plates of the lower prefabricated plate are relatively independent and cannot transmit the load, resulting in a large self-weight of the traditional laminated plate.

In addition, when the bridge deck is paved, it is necessary to erect brackets and set up templates to support the concrete. This method is time-consuming and labor-intensive, especially when the box girder is dismantling the template, which is particularly labor-intensive; When a bridge deck is used, the brackets can obstruct the passage of the route below.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to overcome the defects of the prior art and provide a prefabricated assembled laminated board structure that can withstand tensile force.

The object of the present invention is achieved through the following technical solutions:

A prefabricated and assembled laminated board structure comprises a stacked prefabricated bottom plate and a cast-in-place top plate. The prefabricated bottom plate is formed by matching and connecting a plurality of regular trapezoidal boards and inverted trapezoidal boards in sequence. Edge bevel adaptation.

Further, shearing teeth protrude from the same side edge slope of the normal trapezoidal plate and the inverted trapezoidal plate on the prefabricated bottom plate, and concave teeth that match the setting position of the shear teeth are provided on the edge slope of the other side. The shear teeth and the inner concave teeth between the inverted trapezoidal plates can be seamlessly butted, and the length directions of the normal trapezoidal plate and the inverted trapezoidal plate are flush after the butt joint.

Further, the shear teeth have any one or more of flared, triangular or T-shaped cross-sections.

Further, reinforcement ribs are arranged in the shear teeth; reinforcement ribs are arranged in the shear tooth structure formed on the edge slopes where the inner concave teeth are formed on the normal trapezoid plate and the inverted trapezoid plate.

Still further, the reinforcing bars are steel bars enclosed and arranged along the contours of the shear teeth and the shear tooth structure and/or the steel plates arranged by fitting the tooth surfaces of the shear teeth and the tooth surfaces of the shear tooth structures, and the steel plates connected to the steel plates. The T-shaped structure formed by the reinforcement block.

Still further, the setting amount of the steel bar and the T-shaped structure is determined according to the tensile force that the prefabricated bottom beam needs to bear.

Further, at least one clamping groove is formed on the surfaces of the normal trapezoidal plate and the inverted trapezoidal plate respectively joined with the cast-in-place top plate.

Furthermore, the card slot runs through the longitudinal direction of the normal trapezoidal plate and the inverted trapezoidal plate and is parallel to the longitudinal direction.

Still further, the depth of the card slot is less than 5mm and the width is less than 10mm.

Still further, the spacing between the adjacent card slots on the positive trapezoidal board and the inverted trapezoidal board is 10-50 cm.

Compared with the prior art, the present invention has the following beneficial effects:

1) The prefabricated bottom plate is assembled by the normal trapezoid plate and the inverted trapezoid plate through the edge slope, which can compress the gap between the traditional segment assembly plates to the greatest extent. The closer the contact is, the better the force performance is;

2) The ends of the shear teeth and the shear tooth structure are the "bull legs" that can transmit shear force, so that the tensile force that needs to be transmitted between the prefabricated normal trapezoid plate and the inverted trapezoid plate is converted into the shear force transmitted between the tooth blocks at the joint. force, so that the joint sections of adjacent trapezoidal plates can transmit tensile force to each other;

3) By rationally arranging steel bars or T-shaped structures in the shear teeth and the teeth of the shear tooth structure, the joint section of the tooth block and the non-joint section of the prefabricated bottom plate have basically the same ability to bear the tensile force;

4) The surface of the normal trapezoidal slab and the inverted trapezoidal slab is provided with a slot, which replaces the shear key. After the concrete is poured in place, the prefabricated bottom plate and the cast-in-place top slab will bond well due to the common force, and will not be affected by external forces. The phenomenon of upper and lower dislocation occurs at the bottom;

5) The prefabricated bottom plate is used as the bridge construction template, which is prefabricated in the factory and hoisted on site. Due to the small size of the segmental bridge deck and good mechanical performance, the paving work can be completed only by small machinery, with high construction efficiency and cost can be reduced accordingly. .

Description of drawings

Fig. 1 is the assembly schematic diagram of the prefabricated bottom plate in the prefabricated assembled laminated board structure described in Embodiment 1;

Fig. 2 is the assembled top view of the prefabricated base plate described in Embodiment 2;

3 is a cross-sectional view of a regular trapezoidal plate in Example 2;

Fig. 4 is three kinds of structural representations of shear teeth in embodiment 2;

5 is a schematic diagram of the arrangement of reinforcing ribs in the regular trapezoidal plate in Example 3;

6 is a schematic diagram of the arrangement of reinforcing ribs in the regular trapezoidal plate in Example 4;

Fig. 7 is the structural representation of opening the card slot on the surface of the regular trapezoid plate in embodiment 5;

8 is a partial schematic side view of the prefabricated and assembled laminated board structure described in Embodiment 5. FIG.

Detailed ways

The present invention will be further described below in conjunction with the specific embodiments, wherein, the accompanying drawings are only used for exemplary description, and are only schematic diagrams, not physical drawings, and should not be construed as restrictions on this patent; in order to better illustrate the present invention In the embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

Example 1

A prefabricated and assembled laminated plate structure, applied to bridge deck construction, includes a prefabricated bottom plate 1 and a cast-in-place top plate 2 (as shown in Figure 8 for the cast-in-place top plate), where the prefabricated bottom plate is below and the cast-in-place top plate is above the prefabricated bottom plate, as As shown in FIG. 1, the prefabricated bottom plate 1 is formed by matching and connecting a plurality of regular trapezoidal plates 11 and inverted trapezoidal plates 12 in sequence. The edge slope is adapted to the edge slope in the width direction of the inverted trapezoid plate.

The prefabricated bottom plate of this embodiment is ingeniously designed to be inclined at the position of the joint between the slab and the slab. The inclined surface arrangement can compress the gap between the assembly of the bridge segments to the greatest extent. Tighter, better force performance.

The normal trapezoidal plate 11 and the inverted trapezoidal plate 12 of the prefabricated bottom plate are equipped with appropriate reinforcement meshes 13 (as shown in Figure 3). Under the action, the prefabricated bottom plate of the laminated board mainly bears the tensile force, and the cast-in-place top plate of the laminated board mainly bears the pressure, which can reduce the thickness of the board and reduce the weight of the board. be promoted.

The prefabricated bottom plate of the laminated board is generally prefabricated in the factory and hoisted on site. The prefabricated bottom plate can replace the bridge construction template, speed up the construction speed, reduce the self-weight, save time and cost. Due to the small size of the segmental bridge deck and good mechanical performance, only small machinery can complete the paving work, and the reinforcement arrangement in the bridge deck is determined by the bridge stress calculation.

Example 2

As shown in Figures 2 and 3, this embodiment is based on Embodiment 1. On the prefabricated bottom plate, the edge slopes on the same side of the normal trapezoid plate and the inverted trapezoid plate are protruded with shear teeth 31, and the other side edge slopes are The inner concave teeth 32 matching the setting positions of the shearing teeth are provided, and the shearing teeth 31 and the inner concave teeth 32 between the regular trapezoidal plate and the inverted trapezoidal plate can be seamlessly butted, and the regular trapezoidal plate 11 and the inverted trapezoidal plate can be docked seamlessly. 12 are flush in the length direction. Due to the existence of the inner concave teeth, the regular trapezoidal plate and the inverted trapezoidal plate will form the same shear force tooth structure 33 as the shear force teeth on the edge slope where the inner concave teeth are opened.

As shown in FIG. 4 , the cross-section of the shear teeth 31 is any one or more of a trumpet shape, a triangle shape or a T shape, or other shapes that can be fitted with each other and the tooth end is wider than the tooth head end.

The key function of setting the shear teeth is: the ends of the shear teeth and the shear tooth structure construct a "bull's leg" that can transmit shear force (see the shaded part in Figure 4), so that the prefabricated normal trapezoid and inverted trapezoid plates are formed. The tensile force that needs to be transmitted between the joints is converted into the shear force transmitted between the tooth blocks at the joint, so that the joint sections of the adjacent trapezoidal plates can transmit the tensile force to each other.

Example 3

In order to strengthen the strength of the prefabricated bottom plate 1, this embodiment also arranges reinforcing ribs in the shear teeth 31 on the basis of the second embodiment. Reinforcing bars are also arranged in the force tooth structure 33. As shown in FIG. 5, the reinforcing bars are steel bars 41 enclosed and arranged along the contours of the shear force teeth and the shear force tooth structure, and the two free ends of the bars are finally crossed and bound together.

The setting amount of the reinforcing bars 41 is determined according to the tensile force that the prefabricated bottom beam needs to bear.

By rationally arranging steel bars in the shear teeth and the shear tooth structure, the ability of the joint section between the teeth and the non-joint section of the prefabricated bottom plate to bear the tensile force is basically the same.

Example 4

As shown in FIG. 6 , in this embodiment, the steel bars in Embodiment 3 are replaced by steel plates, that is, a steel plate 42 is provided on the tooth surface of the shear tooth 31 and the tooth surface of the shear tooth structure 33, and the inner end surface of the steel plate is connected There are reinforcing blocks 43, the steel plate 42 and the reinforcing blocks 43 form a T-shaped structure.

The setting amount of the T-shaped structure also needs to be determined according to the tensile force that the prefabricated bottom beam needs to bear.

Of course, the steel bar in Embodiment 3 and the steel plate T-shaped structure of this embodiment can also be used in combination in the shear teeth and the shear tooth structure.

Example 5

In order to enhance the overall stress performance of the laminated plate, as shown in Figures 7 and 8, the normal trapezoidal plate 11 and the inverted trapezoidal plate 12 are respectively provided with at least one clamping slot 5 on the surfaces that are joined with the cast-in-place top plate 2. This embodiment In the example, there are 3 card slots, and the distance between adjacent card slots 5 is 10-50 cm. The card slots 5 run through the length direction of the normal trapezoid plate 11 and the inverted trapezoid plate 12 and are parallel to the length direction. Specifically, the depth of the card slots 5 Generally less than 5mm and width less than 10mm.

Reasonable setting of the slot can increase the bonding force between the prefabricated bottom plate and the cast-in-place top plate, that is, the clip slot replaces the shear key on the joint surface of the prefabricated bottom plate and the cast-in-place roof, which is convenient for the fabrication and construction of the segmental bridge deck. , Cast concrete on the prefabricated floor, after the upper concrete is cured and formed, the upper and lower parts will be well bonded, and the upper and lower parts will not be dislocated under the action of external force, thereby avoiding the dislocation and cracking of the two-layer board, which can be very good. achieve common strength.

Obviously, the above-mentioned embodiments are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A prefabricated assembling laminated board structure is characterized in that, comprising a prefabricated bottom plate and a cast-in-place top plate that are stacked, the prefabricated bottom plate is formed by successively matching and connecting a plurality of regular trapezoidal plates and inverted trapezoidal plates, and the edge slope in the width direction of the regular trapezoidal plate is formed. Compatible with the inclined surface of the edge in the width direction of the inverted trapezoidal plate. 2. The prefabricated and assembled laminated board structure according to claim 1, characterized in that, on the prefabricated bottom plate, the same side edge slopes of the normal trapezoid plate and the inverted trapezoid plate are protruded with shearing teeth, and the other side edge slopes are provided with. The inner concave teeth matching the setting position of the shear teeth, the shear teeth and the inner concave teeth between the normal trapezoid plate and the inverted trapezoid plate can be seamlessly butted, and the length direction of the normal trapezoid plate and the inverted trapezoid plate are flush after the butt joint. 3 . The prefabricated and assembled laminated board structure according to claim 2 , wherein the cross-section of the shear teeth is any one or more of a trumpet shape, a triangle shape or a T shape. 4 . 4. The prefabricated and assembled laminated plate structure according to claim 2 or 3, characterized in that, reinforcing ribs are arranged in the shear teeth; shear teeth formed on the edge slope of the regular trapezoid plate and the inverted trapezoid plate on which the inner concave teeth are provided Reinforcing ribs are arranged in the like structure. 5 . The prefabricated composite panel structure according to claim 4 , wherein the reinforcing bars are steel bars enclosed and arranged along the contours of the shear teeth and the shear tooth structure and/or by fitting the shear teeth surfaces, The shear force tooth structure is a T-shaped structure formed by the steel plate arranged on the tooth surface and the reinforcing block connected with the steel plate. 6 . The prefabricated composite panel structure according to claim 5 , wherein the amount of reinforcement and the T-shaped structure is determined according to the tensile force that the prefabricated bottom beam needs to bear. 7 . 7 . The prefabricated and assembled laminated board structure according to claim 1 , wherein the normal trapezoidal board and the inverted trapezoidal board are respectively provided with at least one clamping groove on the surfaces that are joined to the cast-in-place top board. 8 . 8 . The prefabricated and assembled laminated board structure according to claim 7 , wherein the clamping groove runs through the longitudinal direction of the normal trapezoidal board and the inverted trapezoidal board and is parallel to the longitudinal direction. 9 . 9 . The prefabricated and assembled laminated board structure according to claim 8 , wherein the depth of the clamping groove is less than 5 mm and the width is less than 10 mm. 10 . 10 . The prefabricated and assembled laminated board structure according to claim 9 , wherein the spacing between the adjacent slots on the normal trapezoidal board and the inverted trapezoidal board is 10-50 cm. 11 .

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