CN210031552U

CN210031552U - Solid section die block bearing structure of super high mound concrete

Info

Publication number: CN210031552U
Application number: CN201920798672.XU
Authority: CN
Inventors: 马成; 时小兵; 李辉
Original assignee: China Construction Fourth Engineering Division Corp Ltd
Current assignee: China Construction Fourth Engineering Division Corp Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-02-07
Anticipated expiration: 2029-05-29

Abstract

The utility model belongs to the technical field of bridge construction, specifically disclose a solid section die block bearing structure of super high mound concrete, include the prefabricated plate that matches with hollow section shape in the pier shaft and the inverted triangle-shaped supporter that is used for supporting the prefabricated plate, form the notch between inverted triangle-shaped supporter and the pier shaft top, be equipped with the through-hole that runs through prefabricated plate top surface and side in the prefabricated plate border, the through-hole is formed by horizontal holding hole and vertical bar hole intercommunication, be equipped with the connecting piece of "L" shape in the through-hole, the connecting piece includes horizontal straight portion and vertical portion, horizontal straight portion sliding connection is in the holding hole, vertical portion stretches out the prefabricated plate top upwards; a transverse reserved hole is reserved in the pier body, and the transverse straight part of the connecting piece can penetrate through the reserved hole. The utility model discloses the wholeness that pier shaft and prefabricated plate are connected has been strengthened to can prevent to take place to cut between prefabricated plate upper surface and the post-cast strip and destroy.

Description

Solid section die block bearing structure of super high mound concrete

Technical Field

The utility model relates to a bridge construction technical field, concretely relates to solid section die block bearing structure of super high mound concrete.

Background

The hollow thin-wall pier is a form widely adopted in the structural design of the bridge abutment of the highway at present, has the characteristics of better structural rigidity and strength, light dead weight, large section modulus and smaller sectional area relative to a gravity solid pier, and is mainly used for the construction of high bridges, particularly ultrahigh piers.

After the construction of the concrete structure of the hollow section pier body is completed, solid section concrete needs to be poured at the top of the hollow pier for capping, a common bottom die in the prior art is installed in a groove formed at the top of the pier body by adopting a prefabricated plate, solid section concrete (post-cast strip) is formed at the top of the pier body after secondary post-casting, the prefabricated plate is secondarily poured and is fixedly connected with the pier body to form a bottom die system, and the prefabricated plate is used as a component mainly bearing vertical load. However, the prefabricated panels are only placed in the grooves, and no connecting structure exists between the prefabricated panels and the pier body, so that the connecting integrity between the prefabricated panels and the pier body is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a solid section die block bearing structure of super high mound concrete to solve and be connected the relatively poor problem of wholeness between current prefabricated plate die block bearing structure and the pier shaft.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a bottom die supporting structure for a solid section of ultra-high pier concrete comprises a precast slab matched with the shape of the cross section of a hollow part in a pier body and an inverted triangular supporting body used for supporting the precast slab, wherein a notch is formed between the inverted triangular supporting body and the top of the pier body, a through hole penetrating through the top surface and the side surface of the precast slab is arranged in the edge of the precast slab, the through hole is formed by communicating a transverse accommodating hole and a vertical strip-shaped hole, an L-shaped connecting piece is arranged in the through hole and comprises a transverse straight part and a vertical part, the transverse straight part is connected in the accommodating hole in a sliding mode, and the vertical; a transverse reserved hole is reserved in the pier body, and the transverse straight part of the connecting piece can penetrate through the reserved hole.

The principle of the scheme is as follows:

the through-hole of seting up on the prefabricated plate is used for holding the connecting piece of "L" shape, after the prefabricated plate was arranged in the notch, the horizontal straight portion of connecting piece stretches out the holding hole in the through-hole and penetrates in the preformed hole on the pier body, thereby realize the connection of pier body and prefabricated plate, the wholeness of pier body and prefabricated plate connection has been strengthened, and the vertical portion of connecting piece upwards stretches out the prefabricated plate top surface, after the concrete has been pour once more above the prefabricated plate, the post-cast strip is integrated with the prefabricated plate, and the downthehole concrete that also can be full of bar, the vertical portion of connecting piece is as the skeleton, the downthehole concrete of bar forms similar reinforced concrete's structure with the vertical portion of connecting piece, just be equivalent to through firm class reinforced concrete vertical bar connection between prefabricated plate and the post-cast strip, can prevent to take place to cut between prefabricated.

This scheme of adoption can reach following technological effect:

set up "L" shape connecting piece, through the cooperation in the horizontal straight portion of connecting piece and pier shaft preformed hole, can strengthen the connection wholeness between prefabricated plate and the pier shaft, through the cooperation in the vertical portion of connecting piece and the prefabricated plate upper bar hole, can strengthen the anti-shear effect in prefabricated plate and post-cast strip, avoid taking place between prefabricated plate and the post-cast strip and cut the destruction, guaranteed that the prefabricated plate can form wholly better with upper portion concrete entity section.

Furthermore, a circle of through holes are formed along the edge of the prefabricated plate. By adopting the structure, the prefabricated slab and the pier body can be connected more tightly and firmly.

Furthermore, the connecting piece is formed by bending a steel bar. By adopting the structure, the vertical part of the connecting piece and the concrete in the strip-shaped hole can form a reinforced concrete structure, and the stress state is better.

Further, the reinforcing steel bars are thread reinforcing steel bars. The twisted steel can be more tightly combined with the solid section of concrete.

Further, the horizontal portion is perpendicular to the vertical portion. This structure is a preferable structure, and the vertical portion of the connecting member can be in a vertical state.

Further, a plate-shaped body is welded to the top of the vertical portion. The combination of the plate-shaped body and the solid section concrete enables relative sliding damage between the vertical part of the connecting piece and the solid section concrete to be difficult to occur.

Further, a sleeve is arranged in the reserved hole. Before the concrete pouring of the hollow section of the pier body, a reserved sleeve mode is adopted, and after the pouring is finished, a reserved hole can be formed naturally.

Further, the sleeve is a PVC pipe. After the construction is finished, the sleeve can be left behind the pier body, and the PVC pipe is low in price and does not need to be recycled.

Furthermore, the PVC sleeve and the horizontal straight part of the connecting piece are fixedly connected through structural adhesive. The structural adhesive can enable the PVC sleeve to be combined with the horizontal straight part of the connecting piece more tightly, and can also prevent the horizontal straight part of the connecting piece from rusting.

Furthermore, the bottom of the prefabricated plate is provided with a bulge, and the top of the inverted triangular support body is provided with a groove matched with the bulge. The accurate positioning during the installation of the prefabricated plate can be realized through the matching of the bulges and the grooves, and the installation error of the prefabricated plate is avoided.

Drawings

Fig. 1 is a front cross-sectional view of an embodiment of the present invention;

FIG. 2 is a schematic illustration of FIG. 1 after a solid section of concrete has been poured;

FIG. 3 is a top view of the prefabricated panel of FIG. 1;

fig. 4 is a sectional view taken along line a-a in fig. 3.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the concrete-filled pier comprises a pier body 1, an inverted-triangular supporting body 2, a prefabricated plate 3, a protrusion 30, a through hole 4, an accommodating hole 41, a strip-shaped hole 42, a connecting piece 5, a transverse straight part 51, a vertical part 52, a plate-shaped body 50, a preformed hole 6 and solid section concrete 7.

As shown in fig. 1, the solid section bottom die supporting structure of super high pier concrete of this embodiment, including prefabricated plate 3 and the inverted triangle support 2 that is used for supporting prefabricated plate 3, inverted triangle support 2 sets up in pier shaft 1 top position department downwards slightly (the distance between 2 tops of inverted triangle support and 1 top of pier shaft is the thickness of prefabricated plate 3), inverted

triangle support

2 and 1 integrated into one piece of pier shaft are pour the shaping, form the notch between 2 tops of inverted triangle support and pier shaft 1, provide installation space for

prefabricated plate

3, 3 bottoms integrated into one piece of prefabricated plate have

arch

30, 2 tops of inverted triangle support are seted up can with arch 30 complex recess, accurate location when can realizing the prefabricated plate 3 installation through the cooperation of arch 30 and recess, avoid prefabricated plate 3 installation mistake. The prefabricated slab 3 is matched with the cross section of the hollow part of the pier body 1, namely when the cross section of the hollow part is circular, rectangular or trapezoidal, the prefabricated slab 3 is circular, rectangular or trapezoidal respectively (the embodiment takes the rectangular as an example for illustration), and the prefabricated slab 3 can meet the construction requirements of hollow piers with different shapes.

The inner structure of prefabricated plate 3 combines fig. 1, fig. 3 and fig. 4 show, the through-hole 4 that the round runs through 3 top surfaces of prefabricated plate and side is seted up along the border of prefabricated plate 3, through-hole 4 is formed by horizontal holding hole 41 and vertical bar hole 42 intercommunication, be equipped with the connecting piece 5 of "L" shape in the through-hole 4, connecting piece 5 is formed by the twisted steel bending, connecting piece 5 includes mutually perpendicular violently straight portion 51 and vertical portion 52, the width of holding hole 41 and bar hole 42 all equals with the diameter of twisted steel, violently straight portion 51 sliding connection is in holding hole 41, vertical portion 52 upwards stretches out 3 tops of prefabricated plate, and the welding of vertical portion 52 top has platelike body 50. A transverse preformed hole 6 is reserved on the pier body 1, and the preformed hole 6 is formed in the following mode: and (3) reserving a PVC sleeve, binding the hollow section template of the pier body 1 and the reinforcing steel bar together before pouring the hollow section concrete of the pier body 1, and naturally forming a reserved hole 6 after pouring. The number of the preformed holes 6 is equal to that of the through holes 4 on the prefabricated plate 3, the preformed holes 6 are arranged in a one-to-one correspondence mode, and the transverse straight parts 51 of the connecting pieces 5 can penetrate through the preformed holes 6.

The specific installation process of the bottom die in this embodiment is as follows:

after the notch was installed to prefabricated plate 3, outwards promote connecting piece 5 in each through-hole 4 for the violently straight portion 51 of connecting piece 5 slides in holding hole 41 and penetrates in the PVC sleeve pipe in the preformed hole 6 on the pier shaft 1, then pours into the structure to the preformed hole 6 and glues, concreties between the violently straight portion 51 of PVC sleeve pipe and connecting piece 5 in realizing the preformed hole 6, also avoids the violently straight portion 51 of connecting piece 5 to expose rust simultaneously.

After the bottom die is installed, the solid concrete 7 can be poured, and the cross-sectional view of the solid concrete 7 after the pouring is shown in fig. 2. The horizontal straight part 51 of the connecting piece 5 penetrates into the preformed hole 6 on the pier body 1, so that the connection between the pier body 1 and the prefabricated plate 3 is realized, the connection integrity between the pier body 1 and the prefabricated plate 3 is enhanced, the vertical part 52 of the connecting piece 5 upwards extends out of the top surface of the prefabricated plate 3, after the concrete is poured above the prefabricated plate 3 for the second time, the post-cast strip and the prefabricated plate 3 are connected into a whole, the strip-shaped hole 42 is filled with the concrete, the vertical part 52 of the connecting piece 5 serves as a framework, the concrete in the strip-shaped hole 42 and the vertical part 52 of the connecting piece 5 form a reinforced concrete short column structure, which is equivalent to the connection between the prefabricated plate 3 and the post-cast strip through a firm reinforced concrete short column, the shear failure between the upper surface of the prefabricated plate 3 and the post-cast strip can be prevented, and the prefabricated plate 3 can be better integrated with.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a solid section die block bearing structure of super high mound concrete, includes the prefabricated plate that matches with well kenozooecium cross sectional shape in the pier shaft and the triangle-shaped supporter that falls that is used for supporting the prefabricated plate, form notch, its characterized in that between triangle-shaped supporter and the pier shaft top of falling: the prefabricated plate edge is internally provided with a through hole penetrating through the top surface and the side surface of the prefabricated plate, the through hole is formed by communicating a transverse accommodating hole and a vertical strip-shaped hole, an L-shaped connecting piece is arranged in the through hole and comprises a transverse straight part and a vertical part, the transverse straight part is connected in the accommodating hole in a sliding manner, and the vertical part extends out of the top of the prefabricated plate upwards; the pier shaft is reserved with a transverse reserved hole, and the transverse straight part of the connecting piece can penetrate through the reserved hole.

2. The ultra-high pier concrete solid section bottom die supporting structure of claim 1, which is characterized in that: the through holes are multiple and are arranged along the edge of the precast slab.

3. The ultra-high pier concrete solid section bottom die supporting structure of claim 2, which is characterized in that: the connecting piece is formed by bending a reinforcing steel bar.

4. The ultra-high pier concrete solid section bottom die supporting structure according to claim 3, characterized in that: the reinforcing steel bars are threaded reinforcing steel bars.

5. The ultra-high pier concrete solid section bottom die supporting structure according to claim 4, characterized in that: the horizontal portion is perpendicular to the vertical portion.

6. The ultra-high pier concrete solid section bottom die supporting structure according to claim 5, characterized in that: the top of the vertical part is welded with a plate-shaped body.

7. The ultra-high pier concrete solid section bottom die supporting structure according to any one of claims 1 to 6, wherein: and a sleeve is arranged in the preformed hole.

8. The ultra-high pier concrete solid section bottom die supporting structure of claim 7, which is characterized in that: the sleeve is a PVC pipe.

9. The ultra-high pier concrete solid section bottom die supporting structure of claim 8, which is characterized in that: the PVC sleeve is fixedly connected with the horizontal straight part of the connecting piece through structural adhesive.

10. The ultra-high pier concrete solid section bottom die supporting structure of claim 7, which is characterized in that: the bottom of the precast slab is provided with a bulge, and the top of the inverted triangular support body is provided with a groove matched with the bulge.