CN210589822U

CN210589822U - Bridge precast box girder hogging moment notch positioning template

Info

Publication number: CN210589822U
Application number: CN201920801815.8U
Authority: CN
Inventors: 崔鹏; 郑立晟; 王勇; 潘宝童; 许晓天; 韩云霞
Original assignee: Gansu Xinlu Traffic Engineering Co ltd
Current assignee: Gansu Xinlu Traffic Engineering Co ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-05-22
Anticipated expiration: 2029-05-30

Abstract

The utility model discloses a prefabricated case roof beam hogging moment notch locating template of bridge relates to the prefabricated case roof beam construction field of continuous bridge, for solving the quality common fault that the prefabricated case roof beam hogging moment notch of continuous bridge exists in the present highway engineering construction, notch and concrete shutoff, anchor assembly link up, prestressing force pipeline and reinforcing bar, be difficult to coordinate between the connecting reinforcement etc., unable location, the hogging moment notch leaks thick liquid, the concrete is not closely knit, appearance quality is poor, the edges and corners are not clear, the problem of difficulty is dismantled to the notch template. The template structure is characterized in that a first middle layer template is arranged below the first upper layer template, a first lower layer template is arranged below the first middle layer template, the number of the first upper layer templates is two, second upper layer templates are arranged on two sides of the first upper layer templates, a second middle layer template is arranged below the second upper layer templates, and a second lower layer template is arranged below the second middle layer template.

Description

Bridge precast box girder hogging moment notch positioning template

Technical Field

The invention relates to the field of construction of continuous bridge precast box girders, in particular to a hogging moment notch positioning template for a bridge precast box girder.

Background

A hogging moment notch of a continuous bridge precast box girder is particularly characterized in that a prestressed hogging moment tensioning notch is reserved on a precast box girder top plate of an upper structure of the continuous bridge in highway bridge engineering, so that the bridge structure is changed from simple support to continuous system conversion. In the past, most of hogging moment notch templates are spliced by comb-shaped steel plates, gaps are plugged by foamed rubber, however, too many comb-shaped gaps are too dense, and the appearance quality defect of concrete is clearly limited in construction technical specifications easily appearing in the templates.

The quality common fault that continuous bridge precast box girder hogging moment notch exists in highway engineering construction at present, notch and concrete shutoff, anchor assembly link up, difficult coordination between prestressing force pipeline and reinforcing bar, the connecting reinforcement, unable location, hogging moment notch leaks thick liquid, the concrete is not closely knit, the appearance quality is poor, the edges and corners are unclear, the problem of notch template dismantlement difficulty, consequently the urgent need of a bridge precast box girder hogging moment notch locating template in the market solves these some problems.

Disclosure of Invention

The invention aims to provide a positioning template for a hogging moment notch of a bridge precast box girder, which aims to solve the problems that the quality common faults existing in the hogging moment notch of the continuous bridge precast box girder in the prior highway engineering construction are brought forward, the notch and concrete plugging, the anchoring part connection, the coordination and the positioning between a prestressed pipeline and a steel bar, a connecting steel bar and the like are difficult, the hogging moment notch leaks slurry, the concrete is not compact, the appearance quality is poor, the edge angle is not clear, and the notch template is difficult to disassemble.

In order to achieve the purpose, the invention provides the following technical scheme: a bridge precast box girder hogging moment notch positioning template comprises a first upper template, wherein a first middle template is arranged below the first upper template, a first lower template is arranged below the first middle template, rectangular through holes are formed in the lower end of the first upper template and the upper end of the first lower template, the number of the first upper templates is two, the two first upper templates are parallel, second upper templates are arranged on two sides of the two first upper templates, a second middle template is arranged below the second upper template, a second lower template is arranged below the second middle template, a connecting steel plate is arranged on one side of the second middle template and fixedly connected with the second middle template through a connecting bolt, rectangular through holes are formed in the lower end of the second upper template and the upper end of the second lower template, the upper end of second middle level template is provided with the circle through-hole, and the circle through-hole is provided with two, the lower extreme of second upper template all is provided with the rectangle through-hole with the upper end of second lower floor's template, the bolt connecting pipe is all installed to one side of second upper template, second middle level template and second lower floor's template, is close to the vertical center line of connecting plate one side bolt connecting pipe coincides mutually, and is close to the vertical center line coincidence of connecting plate opposite side bolt connecting pipe mutually, the bolt connecting pipe is all installed to one side of first upper template, first middle level template and first lower floor's template.

Preferably, the bolt connecting pipe is internally provided with a bolt, and the bolt is in threaded connection with the bolt connecting pipe.

Preferably, one side of the lower ends of the first lower-layer template and the second lower-layer template is provided with a fixing flange, the fixing flange is connected with the first lower-layer template and the second lower-layer template in a welding mode, and a fixing bolt is installed inside the fixing flange.

Preferably, the first upper template, the first middle template and the first lower template are parallel, the second upper template, the second middle template and the second lower template are parallel, an included angle between the first upper template and the second upper template is ninety degrees, an included angle between the first middle template and the second middle template is ninety degrees, and an included angle between the first lower template and the second lower template is ninety degrees.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the hogging moment notch template is improved into a layered and partitioned assembled template, so that the mounting and dismounting speeds of the notch template are improved, and the template supporting and dismounting time can be saved by 2-3 hours for each box girder; the upper, middle and lower blocks of the front template, the middle and the lower templates of the hogging moment notch are divided at the upper and lower longitudinal steel bars of the notch, and in order to facilitate the demoulding of the middle template, the notch longitudinal steel bar reserved grooves are arranged on the upper and lower templates, and the corrugated pipe hole of the prestressed duct is reserved on the middle template, so that the large-area opening of the template is reduced, the rigidity and the integrity of the template are enhanced, the deformation of the template is small, and the turnover; the upper, middle and lower blocks of templates on two sides of the hogging moment notch are divided at the upper and lower transverse steel bars of the notch, and in order to facilitate the demoulding of the middle template, the notch transverse steel bar reserved grooves are arranged on the upper and lower templates, so that the problems that the notch is blocked with concrete, an anchoring part is connected, and the coordination between a prestressed pipeline and the steel bars, connecting steel bars and the like is difficult and the positioning cannot be realized are solved; the bottom layer angle steel and the inner film are fixed by perforated screws to prevent the template from floating upwards, and a sliding groove is formed in the inner film to adjust the position of the negative bending moment in consideration of the change of the beam length; the left and right links are connected by small channel steel screws to improve the rigidity of the template; the hogging moment template is integrally connected by bolts, supported and fixed by screws and lead screws, so that the template is good in integral stability and avoids the displacement of an anchor backing plate caused by deformation and dislocation; the cross-shaped supporting rods are used for carrying the screws in the front, back, left and right directions of the notch, and the two ends of the notch are fixed on the template to support and reinforce the rotating screw rod; the use of materials is common and low in price, the processing cost is low, the construction, the installation and the disassembly are quick, the quality is reliably ensured, and the problem of difficulty in disassembling the notch template is solved.

2. The negative moment notch template is used for ensuring that the box girder quality achieves the internal and external beauty, the concrete leakage, the compactness and the edge protection are obviously improved, the construction quality reaches the design and standard requirements, the quality acceptance qualified rate is 100 percent, and the problems of negative moment notch leakage, the uncompacted concrete, poor appearance quality and unclear edges are solved.

3. The template deformation is little and the turnover utilization rate is high. The traditional template can reduce and process 5-10 sets of negative bending moment templates. Greatly reduces the use of the joint mixture, can save 4-6 tanks of filling agent for each 1 tank beam, and simultaneously eliminates the quality defect caused by incomplete cleaning or expansion invasion of the joint mixture into concrete. The cleaning work of slurry leakage of the box girder precast hogging moment notch is reduced, the cleaning work can be saved for 1-2 hours per 1 box girder, and the construction environmental protection benefit and the economic benefit are good.

Drawings

FIG. 1 is a top view of the present invention;

FIG. 2 is a cross-sectional view taken along the line A-A of the present invention;

fig. 3 is a sectional view taken along the direction B-B of the present invention.

In the figure: 1. a first upper template; 2. a first middle layer template; 3. a first lower template; 4. connecting steel plates; 5. a bolt; 6. a connecting bolt; 7. a circular through hole; 8. a rectangular through hole; 9. a bolt connecting pipe; 10. fixing the bolt; 11. a fixed flange; 12. a second upper template; 13. a second middle layer template; 14. and a second lower template.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, an embodiment of the present invention is shown: a bridge precast box girder hogging moment notch positioning template comprises a first upper template 1, a first middle template 2 is arranged below the first upper template 1, a first lower template 3 is arranged below the first middle template 2, rectangular through holes 8 are respectively formed in the lower end of the first upper template 1 and the upper end of the first lower template 3, two first upper templates 1 are arranged and parallel to each other, second upper templates 12 are respectively arranged on two sides of the two first upper templates 1, a second middle template 13 is arranged below the second upper template 12, a second lower template 14 is arranged below the second middle template 13, a connecting steel plate 4 is arranged on one side of the second middle template 13, the connecting steel plate 4 is fixedly connected with the second middle template 13 through a connecting bolt 6, rectangular through holes 8 are respectively formed in the lower end of the second upper template 12 and the upper end of the second lower template 14, the upper end of second middle template 13 is provided with circle through-hole 7, and circle through-hole 7 is provided with two, the lower extreme of second upper template 12 all is provided with rectangle through-hole 8 with the upper end of second lower floor's template 14, second upper template 12, bolt connecting pipe 9 is all installed to one side of second middle template 13 and second lower floor's template 14, the perpendicular central line that is close to bolt connecting pipe 9 on 4 one sides of binding steel plate coincides mutually, and the perpendicular central line that is close to 4 opposite side bolt connecting pipes 9 of binding steel plate coincides mutually, bolt connecting pipe 9 is all installed to one side of first upper template 1, first middle template 2 and first lower floor's template 3.

Further, a bolt 5 is provided inside the bolt connection pipe 9, and the bolt 5 is connected with the bolt connection pipe 9 through a thread.

Further, one side of the lower ends of the first lower template 3 and the second lower template 14 is provided with a fixing flange 11, the fixing flange 11 is connected with the first lower template 3 and the second lower template 14 in a welding mode, and a fixing bolt 10 is installed inside the fixing flange 11.

Further, the first upper template 1, the first middle template 2 and the first lower template 3 are parallel, the second upper template 12, the second middle template 13 and the second lower template 14 are parallel, the included angle between the first upper template 1 and the second upper template 12 is ninety degrees, the included angle between the first middle template 2 and the second middle template 13 is ninety degrees, and the included angle between the first lower template 3 and the second lower template 14 is ninety degrees.

The working principle is as follows: the first upper-layer template 1, the first middle-layer template 2, the second upper-layer template 12 and the second middle-layer template 13 are made of steel plates with the thickness of 1cm, the first lower-layer template 3 and the second lower-layer template 14 are made of 7cm equilateral angle steel, a mounting design drawing is respectively connected with bolt connecting pipes 9 on the upper, middle and lower layers of templates, the inner diameter of each bolt connecting pipe 9 is phi 22, upper and lower nuts are arranged on a vertical line, processing is carried out according to the size of a hogging moment notch designed by the drawing, and the fixing flange 11 is made of 5mm materials and then is respectively welded on the first lower-layer template 3 and the second lower-layer template 14; according to the distance and the position of the steel bars on the design drawing, cutting large rectangular through holes 8 such as upper and lower steel bars on the first upper template 1, the second upper template 12, the first lower template 3 and the second lower template 14 by using a plasma cutting machine and designing the drawing, wherein the square holes are 3cm high, and cutting rectangular through holes 8 and round through holes 7 with the same diameter of a corrugated pipe on the first upper template 1, the first middle template 2, the second upper template 12 and the second middle template 13 by using a plasma cutting machine according to the position of a negative moment prestress pipeline in the design drawing; when the steel plate connecting structure is installed, firstly, a first upper layer template 1, a first middle layer template 2 and a first lower layer template 3 are stacked, bolt connecting pipes 9 on the first upper layer template 1, the first middle layer template 2 and the first lower layer template 3 are aligned, bolt bolts 5 are installed into the bolt connecting pipes 9, then a second upper layer template 12, a second middle layer template 13 and a second lower layer template 14 are stacked and aligned, the bolt bolts 5 are installed, so that the limiting among the templates is realized, and a connecting steel plate 4 is fixed on the second middle layer template 13 through connecting bolts 6; the assembled first upper formwork 1, first middle formwork 2, first lower formwork 3, second upper formwork 12, second middle formwork 13 and second lower formwork 14 are moved to the area needing to be installed, and fixing bolts 10 penetrate through fixing flanges 11 and are driven into the ground for integral fixing, so that construction can be carried out; during disassembly, firstly rotating the bolt 5 to pull out, then loosening the fixing bolt 10 on the fixing flange 11, and disassembling the first lower template 3 and the second lower template 14 along with the inner film; firstly, removing the first upper-layer template 1, and then removing the second upper-layer template 12; and finally, the first middle-layer template 2 and the second middle-layer template 13 are dismantled in a partitioning manner, and the hogging moment notch template is used for obviously improving the aspects of slurry leakage, compaction and corner protection of box girder hogging moment notch concrete.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a bridge precast box girder hogging moment notch locating template, includes first upper template (1), its characterized in that: a first middle template (2) is arranged below the first upper template (1), a first lower template (3) is arranged below the first middle template (2), rectangular through holes (8) are formed in the lower end of the first upper template (1) and the upper end of the first lower template (3), two first upper templates (1) are arranged and parallel to each other, second upper templates (12) are arranged on two sides of the two first upper templates (1), a second middle template (13) is arranged below the second upper templates (12), a second lower template (14) is arranged below the second middle template (13), a connecting steel plate (4) is arranged on one side of the second middle template (13), and the connecting steel plate (4) is fixedly connected with the second middle template (13) through a connecting bolt (6), the lower end of the second upper layer template (12) and the upper end of the second lower layer template (14) are both provided with rectangular through holes (8), the upper end of the second middle layer template (13) is provided with a round through hole (7), two circular through holes (7) are arranged, rectangular through holes (8) are arranged at the lower end of the second upper layer template (12) and the upper end of the second lower layer template (14), one side of the second upper layer template (12), one side of the second middle layer template (13) and one side of the second lower layer template (14) are all provided with bolt connecting pipes (9), the vertical center lines of the bolt connecting pipes (9) at one side close to the connecting steel plates (4) are coincided, and the vertical center lines of the bolt connecting pipes (9) close to the other side of the connecting steel plate (4) are coincided, bolt connecting pipes (9) are installed on one sides of the first upper layer template (1), the first middle layer template (2) and the first lower layer template (3).

2. The bridge precast box beam hogging moment notch positioning template of claim 1, characterized in that: the bolt connecting pipe is characterized in that a bolt (5) is arranged inside the bolt connecting pipe (9), and the bolt (5) is connected with the bolt connecting pipe (9) through threads.

3. The bridge precast box beam hogging moment notch positioning template of claim 1, characterized in that: one side of the lower ends of the first lower-layer template (3) and the second lower-layer template (14) is provided with a fixing flange (11), the fixing flange (11) is connected with the first lower-layer template (3) and the second lower-layer template (14) in a welding mode, and fixing bolts (10) are installed inside the fixing flange (11).

4. The bridge precast box beam hogging moment notch positioning template of claim 1, characterized in that: the first upper template (1), the first middle template (2) and the first lower template (3) are parallel, the second upper template (12), the second middle template (13) and the second lower template (14) are parallel, an included angle between the first upper template (1) and the second upper template (12) is ninety degrees, an included angle between the first middle template (2) and the second middle template (13) is ninety degrees, and an included angle between the first lower template (3) and the second lower template (14) is ninety degrees.