Rotary steel bar lap joint mechanism for bridge prefabricated parts

Abstract

The utility model relates to the field of bridge building, and discloses a bridge prefabricated part rotary steel bar lap joint mechanism which comprises a left side prefabricated plate and a right side prefabricated plate, a wet joint is arranged between the left side prefabricated plate and the right side prefabricated plate, and a wet joint bottom formwork is laid in the wet joint; a double-ring anchoring structure is formed by the left-side rotary steel bar, the right-side rotary steel bar and the annular steel bar, the problem that the width of a cast-in-place seam is too large is solved through the connecting mode, the defect that the welding workload of the steel bars is large is overcome, construction convenience is greatly improved, and construction cost is reduced. According to the connection mode, the joint has enough strength and ductility under the action of drawing and bending, compared with anchor plate steel bar connection, the rotary steel bar joint is better in ductility, the crack width of the annular connector is smaller in the normal use state, the joint is in a rotary steel bar lap joint connection mode, and therefore the joint can be conveniently connected. Extension steel bars of the prefabricated slabs on the left side and the right side are full-length rotary steel bars, the construction efficiency is improved, and the assembly degree is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge erection, in particular to a bridge precast component rotary type steel bar lapping mechanism. BACKGROUND

[0002] With the rapid development of bridge construction industry in China, the industrialized construction concept of bridge is explored and practiced in bridge construction, and the precast bridge deck slab is more and more applied to bridge structure. The construction process adopts the construction method of factory precast and on-site assembly, which can reduce the on-site concrete pouring engineering quantity, reduce the construction land occupation and construction period, make the bridge construction more high quality and low consumption, and gradually promote the application in bridge construction.

[0003] The characteristics and key points of the precast structure are the connection between the segments, so the design criteria and construction standards of the precast bridge deck slab joint are important links in the construction of the precast bridge deck slab. The cast-in-place joint is a common connection form of the precast bridge deck slab, and the protruding steel bars of adjacent precast slabs are connected at the cast-in-place joint. The wet joint connection form of the precast bridge deck slab is commonly used in steel-concrete composite bridges, precast T-beams and small box girder bridges. According to the connection position, it can be divided into transverse joints and longitudinal joints. The stress types of different joints are different.

[0004] At present, the commonly used steel bar connection form of the cast-in-place joint is welding connection. The welding connection has good stress performance, and at the same time, the required width of the cast-in-place joint is reduced. However, the number of steel bar welding is large, which increases the welding workload at the site. In addition, the lower layer steel bar is inconvenient to weld, and the construction quality is not easy to guarantee. CONTENT OF THE INVENTION

[0005] In order to solve the problem that the welding connection has good stress performance, and at the same time, the required width of the cast-in-place joint is reduced, but the number of steel bar welding is large, which increases the welding workload at the site, and in addition, the lower layer steel bar is inconvenient to weld, and the construction quality is not easy to guarantee, the present application provides a bridge precast component rotary type steel bar lapping mechanism.

[0006] The bridge precast component rotary type steel bar lapping mechanism provided by the present application adopts the following technical scheme:

[0007] A bridge precast component rotary type steel bar lapping mechanism, comprising a left precast slab and a right precast slab, a wet joint is arranged between the left precast slab and the right precast slab, a wet joint bottom formwork is arranged in the wet joint, a plurality of anchoring steel bars are arranged on the wet joint bottom formwork, and an annular steel bar is lapped and sleeved on the outer wall of the plurality of anchoring steel bars.

[0008] Preferably, the left precast slab is internally provided with a plurality of left precast slab main bars, the outer wall of the plurality of left precast slab main bars is lap-sleeved with a left rotary steel bar, the right precast slab is internally provided with a plurality of right precast slab main bars, and the outer wall of the plurality of right precast slab main bars is lap-sleeved with a right rotary steel bar.

[0009] Preferably, the left rotary steel bar and the right rotary steel bar are both provided in plurality, and the closed loop end of each left rotary steel bar and right rotary steel bar is horizontally staggered and lap-sleeved on the outer wall of the anchoring steel bar.

[0010] Preferably, the left rotary steel bar, the right rotary steel bar and the annular steel bar form a double-ring anchoring structure.

[0011] Preferably, the left rotary steel bar and the right rotary steel bar are both rectangular and distributed in the left precast slab and the right precast slab respectively, and the plurality of anchoring steel bars are rectangular and distributed in the interior of the wet joint.

[0012] In summary, the present application has the following beneficial technical effects:

[0013] 1. The left rotary steel bar, the right rotary steel bar and the annular steel bar form a double-ring anchoring structure, which not only solves the problem of excessively large cast-in-place joint width, but also avoids the disadvantage of large steel bar welding workload, greatly improving the construction convenience, and the connection mode makes the joint have sufficient strength and ductility under the action of pulling and bending, compared with the anchoring plate steel bar connection, the rotary steel bar joint has better ductility, and the crack width of the annular joint is smaller in the normal use state, from the degree of stress performance and cost, the rotary steel bar joint is superior to the anchoring plate steel bar connection.

[0014] 2. The joint adopts the rotary steel bar lap joint connection mode, the left and right precast slabs are provided with full-length rotary steel bars, the full-length rotary steel bars are lap-sleeved with the protruding steel bars of the adjacent precast slabs, the anchoring steel bars are placed in the overlapping area, and then high-performance concrete is poured, thereby improving the construction efficiency and promoting the degree of assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structural front view of the application embodiment;

[0016] Fig. 2 is an exploded view of the structure of the application embodiment;

[0017] Fig. 3 is a structural schematic view of the precast slab main bar and the rotary steel bar of the application embodiment.

[0018] Explanation of reference signs: 1, left precast slab; 2, left precast slab main reinforcement; 3, left rotary reinforcement; 4, right precast slab; 5, right precast slab main reinforcement; 6, right rotary reinforcement; 7, anchoring reinforcement; 8, ring-shaped reinforcement; 9, wet joint bottom formwork. DETAILED DESCRIPTION

[0019] The following will be described in detail in combination with the accompanying drawings. Figs. 1-3 The present application is further described in detail.

[0020] The embodiment of the present application discloses a rotary type reinforcement lapping mechanism for bridge precast components, referring to Figs. 1-3 , comprising a left precast slab 1 and a right precast slab 4, a wet joint is arranged between the left precast slab 1 and the right precast slab 4, a wet joint bottom formwork 9 is arranged inside the wet joint, a plurality of anchoring reinforcements 7 are arranged on the wet joint bottom formwork 9, a ring-shaped reinforcement 8 is lapped and sleeved on the outer wall of the plurality of anchoring reinforcements 7, a plurality of left precast slab main reinforcements 2 are arranged inside the left precast slab 1, left rotary reinforcements 3 are lapped and sleeved on the outer wall of the plurality of left precast slab main reinforcements 2, a plurality of right precast slab main reinforcements 5 are arranged inside the right precast slab 4, right rotary reinforcements 6 are lapped and sleeved on the outer wall of the plurality of right precast slab main reinforcements 5, the left rotary reinforcements 3, the right rotary reinforcements 6 and the ring-shaped reinforcement 8 form a double-ring anchoring structure, through the connection mode, the problem of excessively large cast-in-place joint width is solved, and the defect of large steel reinforcement welding workload is avoided, the construction convenience is greatly improved, and the connection mode makes the joint have sufficient strength and ductility under the action of pulling and bending, compared with the anchoring plate steel reinforcement connection, the rotary type steel reinforcement joint has better ductility, and the crack width of the ring-shaped joint is smaller in the normal use state, from the degree of stress performance and cost, the rotary type steel reinforcement joint is superior to the anchoring plate steel reinforcement connection;

[0021] The left rotary reinforcements 3 and the right rotary reinforcements 6 are both provided in plurality, the closed loop ends of each of the left rotary reinforcements 3 and the right rotary reinforcements 6 are horizontally staggered and lapped on the outer wall of the anchoring reinforcement 7, the left rotary reinforcements 3 and the right rotary reinforcements 6 are both rectangular and are distributed in the left precast slab 1 and the right precast slab 4 respectively, the plurality of anchoring reinforcements 7 are distributed in the inside of the wet joint in a rectangular shape, the joint adopts the connection mode of the rotary type steel reinforcement lapping, the left and right precast slabs adopt the rotary type steel reinforcement in length and are lapped with the protruding steel reinforcements of the adjacent precast slabs, the anchoring reinforcement 7 is placed in the overlapping area, and then high-performance concrete is poured, so that the construction efficiency is improved and the assembly degree is improved.

[0022] Finally should be explained a few points are: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the term "installation", "connected", "connection" should be broad, can be mechanical or electrical connection, but also can be two elements inside the communication, can be directly connected, "up", "down", "left", "right" and so on, only for indicating the relative position relationship, when the absolute position of the described object changes, the relative position relationship may change;

[0023] Second: the utility model discloses the embodiment in the drawing, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of not conflicting, the same embodiment and different embodiments of the utility model can be combined with each other;

[0024] Finally: the above only for the preferred embodiment of the utility model has, and does not limit the utility model, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

[0025] The above are the preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application, should be covered within the protection scope of the present application.

Claims

1. A rotary rebar splicing mechanism for precast bridge components, comprising a left precast slab (1) and a right precast slab (4), characterized in that: A wet joint is provided between the left precast slab (1) and the right precast slab (4). A wet joint bottom template (9) is laid inside the wet joint. A number of anchoring steel bars (7) are provided on the bottom template (9). A ring steel bar (8) is lapped on the outer wall of the anchoring steel bars (7).

2. The rotary rebar splicing mechanism for precast bridge components according to claim 1, characterized in that: The interior of the left precast slab (1) is provided with a number of left precast slab main reinforcement bars (2), and the outer walls of the number of left precast slab main reinforcement bars (2) are lapped with left rotary reinforcement bars (3). The interior of the right precast slab (4) is provided with a number of right precast slab main reinforcement bars (5), and the outer walls of the number of right precast slab main reinforcement bars (5) are lapped with right rotary reinforcement bars (6).

3. The rotary rebar splicing mechanism for precast bridge components according to claim 2, characterized in that: Multiple left-side rotating reinforcing bars (3) and right-side rotating reinforcing bars (6) are provided, and the closed-loop ends of each left-side rotating reinforcing bar (3) and right-side rotating reinforcing bar (6) are horizontally and equidistantly overlapped and sleeved on the outer wall of the anchoring reinforcing bar (7).

4. A rotary rebar splicing mechanism for precast bridge components according to claim 2, characterized in that: The left-side rotating reinforcing bar (3), the right-side rotating reinforcing bar (6), and the ring reinforcing bar (8) form a double-ring anchorage structure.

5. A rotary rebar splicing mechanism for precast bridge components according to claim 2, characterized in that: The left-side rotating reinforcing bar (3) and the right-side rotating reinforcing bar (6) are both rectangularly distributed in the left-side precast slab (1) and the right-side precast slab (4) respectively, and a number of the anchoring reinforcing bars (7) are rectangularly distributed inside the wet joint.

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