Dovetail-shaped steel-concrete combined bridge deck slab joint side formwork

Abstract

The utility model discloses a dovetail tenon-shaped steel concrete combined bridge deck slab joint side formwork. The dovetail tenon-shaped steel concrete combined bridge deck slab joint side formwork comprises a dovetail tenon-shaped formwork base. The upper end of the mold base is provided with a pouring opening communicating with an inner cavity of the mold base. The lower end of the die holder is provided with a lower port communicated with an inner cavity of the die holder; a plurality of first clearance gaps which are arranged at intervals in the left-right direction are formed in the side wall, in the front-back direction, of the mold base, a plurality of second clearance gaps which are arranged at intervals in the front-back direction are formed in the side wall, in the left-right direction, of the mold base, and the first clearance gaps and the second clearance gaps are used for avoiding longitudinal steel bars and transverse steel bars of the bridge deck slab correspondingly; the die holder can be inserted from top to bottom, and concrete is poured into an inner cavity of the die holder through the pouring opening; by the adoption of the insertion type mold base, tedious steps such as mold plate splicing and horizontal hole alignment are avoided, the mold has the advantages of being simple, efficient and high in standardization degree, time and labor are saved when the mold plate is dismantled, the integrity of the mold plate is guaranteed, the construction period can be shortened, and meanwhile the whole set of mold plate and dismantling equipment are simple in material taking, easy to machine, capable of being recycled and remarkable in economic effect.

Description

Technical Field

[0001] The utility model relates to a field, in particular to a dovetail-shaped steel-concrete composite bridge deck joint side formwork. Background Art

[0002] With the continuous development of modern highway bridge technology, bridge structures are changing with each passing day. Among them, the joint form of large-span steel box girder bridge decks is constantly innovating. Drawing on the ancient mortise and tenon structure, the "dovetail tenon" concrete bridge deck joint came into being. The dovetail tenon structure has a small head tenon and a large tail tenon, and its shape is like a dovetail. As the "mother of all tenons", the dovetail tenon has super tensile properties. When applied to the joint structure of steel-concrete composite bridge decks, it can greatly improve the tensile strength and integrity between different bridge decks; but due to the special shape of the dovetail tenon, and the fact that the concrete bridge deck structure has more steel bars and is densely distributed, and also runs through many PBL shear keys, the concrete formwork processing, installation and removal of the dovetail tenon-shaped joint structure of the bridge deck is relatively difficult.

[0003] At present, the common construction technology of side formwork of steel-concrete composite bridge deck joints at home and abroad is: use wooden formwork or steel plate to open holes and splice into side formwork, fix it with steel bars or stiffening plates, and remove it piece by piece after the concrete pouring is completed and reaches the expected strength; this formwork construction technology is to fix or remove it from the side of the bridge deck horizontally through the connecting steel bars, but because the dovetail structure has a small head tenon and a large tail tenon, a large number of them, and steel bars and shear keys are set in the vertical and horizontal directions, the installation and removal cannot be carried out horizontally from the side of the bridge deck, and there is a mold expansion phenomenon during concrete pouring, which will increase the pressure between the concrete and the formwork, resulting in a larger static friction between the concrete and the formwork. If the formwork is removed upward, it is difficult to remove it with manpower, the efficiency is not high, and the local force is too large to easily damage the formwork, affecting the recycling of materials.

[0004] Therefore, a dovetail-shaped steel-concrete composite bridge deck joint side formwork is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a dovetail-shaped steel-concrete composite bridge deck joint side formwork.

[0006] An embodiment of the utility model solves the technical problem by adopting a technical solution: a dovetail-shaped steel-concrete composite bridge deck joint side formwork, comprising a dovetail-shaped formwork base;

[0007] The upper end of the mold base is provided with a pouring port communicated with the inner cavity thereof;

[0008] The lower end of the mold base is provided with a lower opening communicating with the inner cavity thereof;

[0009] A plurality of first avoidance gaps are arranged at intervals along the left-right direction on the side walls in the front-back direction of the mold base, and a plurality of second avoidance gaps are arranged at intervals along the front-back direction on the side walls in the left-right direction of the mold base, and the first avoidance gaps and the second avoidance gaps are respectively used to avoid the longitudinal steel bars and transverse steel bars of the bridge deck;

[0010] The mold base can be inserted from top to bottom and concrete can be poured into the inner cavity of the mold base at the pouring port.

[0011] As one of the preferred embodiments of the utility model, the mold base includes a left mold and a right mold assembled with the left mold.

[0012] As one of the preferred embodiments of the utility model, a plurality of demoulding rings are provided on the upper end surface of the mold base.

[0013] As one of the preferred embodiments of the utility model, a dovetail-shaped steel-concrete composite bridge deck joint side formwork also includes a leak-proof membrane that is coated on the outer side wall of the form base and blocks the first air avoidance gap and the second air avoidance gap.

[0014] As one of the preferred embodiments of the utility model, the leak-proof membrane is configured as a rubber sheet.

[0015] The beneficial effects of the utility model include: a dovetail-shaped steel-concrete composite bridge deck joint side formwork, comprising a dovetail-shaped formwork base; a casting port connected to its inner cavity is provided at the upper end of the formwork base; a lower through port connected to its inner cavity is provided at the lower end of the formwork base; a plurality of first air-avoiding gaps arranged at intervals along the left-right direction are provided on the side walls in the front-to-back direction of the formwork base, and a plurality of second air-avoiding gaps arranged at intervals along the front-to-back direction are provided on the side walls in the left-to-right direction of the formwork base, the first air-avoiding gaps and the second air-avoiding gaps are respectively used to avoid the longitudinal steel bars and the transverse steel bars of the bridge deck; the formwork base can be inserted from top to bottom and concrete can be poured into the inner cavity of the formwork base at the casting port; by adopting an inserted formwork base, tedious steps such as formwork splicing and horizontal hole alignment are avoided, and the formwork has the advantages of being simple, efficient and highly standardized, and not only time and labor are saved when removing the formwork, but also the integrity of the formwork is ensured, which can save construction period, and at the same time, the whole set of formwork and removal equipment can be obtained with simple materials, easy to process, and recyclable, with remarkable economic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural schematic diagram of a dovetail-shaped steel-concrete composite bridge deck joint side formwork;

[0018] Figure 2 It is a partial structural schematic diagram of a dovetail-shaped steel-concrete composite bridge deck joint side formwork. DETAILED DESCRIPTION

[0019] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0020] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0023] Reference Figure 1 to Figure 2 , a dovetail-shaped steel-concrete composite bridge deck joint side formwork, comprising a dovetail-shaped form base 10;

[0024] The upper end of the mold base 10 is provided with a pouring port 22 communicating with the inner cavity 21 thereof;

[0025] The lower end of the mold base 10 is provided with a lower opening 23 communicating with its inner cavity 21;

[0026] A plurality of first avoidance gaps 30 are arranged at intervals along the left-right direction on the side walls of the mold base 10 in the front-to-back direction, and a plurality of second avoidance gaps 40 are arranged at intervals along the front-to-back direction on the side walls of the mold base 10 in the left-to-right direction. The first avoidance gaps 30 and the second avoidance gaps 40 are respectively used to avoid the longitudinal steel bars and the transverse steel bars of the bridge deck.

[0027] The mold base 10 can be inserted from top to bottom and concrete can be poured into the inner cavity 21 of the mold base 10 at the pouring port 22 .

[0028] In the utility model, when in use, the insertion method is adopted for installation. First, the first avoidance gap 30 and the second avoidance gap 40 on the mold base 10 are aligned with the bridge deck reinforcement and shear key position, and then inserted from top to bottom, and the longitudinal reinforcement and transverse reinforcement are used for natural fixation, and the grooves corresponding to the longitudinal reinforcement and transverse reinforcement are hollowed out on the leak-proof membrane 60 to wrap the outside of the mold base 10, and the first avoidance gap 30 and the second avoidance gap 40 are blocked, and the bottom of the mold base 10 (the lower opening 23) is filled with foam glue to prevent concrete leakage, and finally concrete is poured into the inner cavity 21 of the mold base 10 through the pouring port 22, and the concrete is ready for demoulding after drying.

[0029] When demoulding, first make a removal device. Specifically, use rectangular thick steel plates to stack to form a shoulder beam, and weld two perforated steel plates on the left and right sides of the top surface of the shoulder beam. The position of the hole is consistent with the position of the demoulding ring 50, and then use fine-rolled threaded steel and cut hook-shaped steel plates to make four hooks, which are fixed to the perforated steel plates with bolts, and then use two small jacks to support the two ends of the shoulder beam to make a template removal device; the demoulding process is as follows: first remove the leak-proof film 60, then place the template removal device on the mold base 10, and make the hooks hang on the four demoulding rings 50 on the mold base 10, and then lift it upward through the jacks at both ends of the shoulder beam, pull the mold base 10 vertically upward, and complete the removal.

[0030] The advantages of the utility model are: by adopting an inserted mold base 10, tedious steps such as template splicing and horizontal hole alignment are avoided, and it has the advantages of being simple, efficient and highly standardized. It not only saves time and effort when removing the template, but also ensures the integrity of the template, which can save construction period. At the same time, the whole set of templates and removal equipment are simple to obtain materials, easy to process, and recyclable, with significant economic effects.

[0031] Preferably, the mold base 10 includes a left mold 11 and a right mold 12 assembled with the left mold 11; this arrangement can reduce the fixed volume of the mold base 10 and facilitate storage and transportation.

[0032] Preferably, a plurality of demoulding rings 50 are provided on the upper end surface of the mold base 10 ; preferably, there are four demoulding rings 50 evenly distributed at the four corners of the upper end surface of the mold base 10 .

[0033] A dovetail-shaped steel-concrete composite bridge deck joint side formwork also includes a leakproof membrane 60 that is coated on the outer wall of the form base 10 and blocks the first air avoidance gap 30 and the second air avoidance gap 40; as a preferred embodiment of the leakproof membrane 60, the leakproof membrane 60 is configured as a rubber sheet.

[0034] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A dovetail steel-concrete composite bridge deck joint side formwork, characterized in that: It includes a dovetail-shaped mold base (10); The upper end of the mold base (10) is provided with a pouring port (22) communicating with the inner cavity (21) thereof; The lower end of the mold base (10) is provided with a lower opening (23) communicating with the inner cavity (21) thereof; A plurality of first avoidance gaps (30) arranged at intervals in the left-right direction are provided on the side walls in the front-to-back direction of the mold base (10), and a plurality of second avoidance gaps (40) arranged at intervals in the front-to-back direction are provided on the side walls in the left-to-right direction of the mold base (10), wherein the first avoidance gaps (30) and the second avoidance gaps (40) are respectively used to avoid longitudinal steel bars and transverse steel bars of the bridge deck; The mold base (10) can be inserted from top to bottom and concrete can be poured into the inner cavity (21) of the mold base (10) through the pouring port (22).

2. The dovetail-shaped steel-concrete composite bridge deck joint side formwork according to claim 1, characterized in that: The mold base (10) comprises a left mold (11) and a right mold (12) assembled with the left mold (11).

3. The dovetail-shaped steel-concrete composite bridge deck joint side formwork according to claim 1, characterized in that: The upper end surface of the mold base (10) is provided with a plurality of demoulding hanging rings (50).

4. The dovetail-shaped steel-concrete composite bridge deck joint side formwork according to claim 1, characterized in that: It also includes a leak-proof film (60) that covers the outer side wall of the mold base (10) and blocks the first air-avoiding gap (30) and the second air-avoiding gap (40).

5. The dovetail-shaped steel-concrete composite bridge deck joint side formwork according to claim 4, characterized in that: The anti-leakage membrane (60) is configured as a rubber sheet.

Images