CN113174843B - Customized openable bridge expansion joint template and construction method - Google Patents
Customized openable bridge expansion joint template and construction method Download PDFInfo
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- CN113174843B CN113174843B CN202110390798.5A CN202110390798A CN113174843B CN 113174843 B CN113174843 B CN 113174843B CN 202110390798 A CN202110390798 A CN 202110390798A CN 113174843 B CN113174843 B CN 113174843B
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- template
- expansion joint
- box girder
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a customized openable bridge expansion joint template and a construction method, wherein the template comprises an end template, wherein a plurality of groups of openable supporting mechanisms which can be opened and closed are arranged on the back surface of the end template; the opening and closing supporting mechanism is used for supporting the end template when being unfolded, and the end template is loosened when being rotated and closed. This template can be according to the demand that on-spot case beam-ends mould was established, the template of the corresponding size of customization, pour at the expansion joint and accomplish after, can be convenient dismantle it, effectively improved work efficiency, reduced construction cost.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a customized openable bridge expansion joint template and a construction method.
Background
At present, in the construction process of a domestic cast-in-place box girder expansion joint, the supporting space of end molds at two ends of the box girder is narrow, the width of the bridge expansion joint is 80mm by taking a certain municipal bridge engineering project as an example, and the conventional mold filling method is to fill a foam board at the expansion joint after a template is supported so as to achieve the purposes of controlling the width of the expansion joint and ensuring the quality of the end of the cast-in-place box girder. When the formwork is removed, the foam board is hooked by a hook manually, and then the formwork is pulled out, the method has the advantages that the materials are easy to obtain and low in price, but the hardness of the foam board is low, and the expansion joint is easy to extrude and deform to narrow the width of the expansion joint when the box girder concrete is poured; in addition, the construction is not easy to carry out during the removal, the box girder can not be hooked out completely, and the surface of the end head of the box girder formed after the form removal is not smooth.
Disclosure of Invention
The invention mainly aims to provide a customized openable bridge expansion joint template and a construction method, the template can be used for customizing templates with corresponding sizes according to the requirements of on-site box girder end formwork erection, the working efficiency is improved, the construction cost is reduced, and the expansion joint can be conveniently disassembled after the pouring of the expansion joint is finished, so that the working efficiency is effectively improved, and the construction cost is reduced.
In order to achieve the technical features, the invention is realized as follows: a customized openable bridge expansion joint template comprises an end template, wherein a plurality of groups of openable supporting mechanisms are arranged on the back surface of the end template; the opening and closing supporting mechanism is used for supporting the end template when being unfolded, and the end template is loosened when being rotated and closed.
The size of the end head template is determined according to the size of the section of the box girder and is formed by cutting and splicing a plurality of templates.
The opening and closing supporting mechanism comprises supporting vertical ribs, and each supporting vertical rib is hinged to the back of the end template through hinges with different heights.
The end template adopts a wood template, a bamboo plywood, a shaped combined steel template or a cold-formed thin-wall steel plate.
The vertical length direction dimension B of the supporting vertical rib is larger than the width direction dimension A, so that the supporting vertical rib can be separated from the end face of the poured box girder after being folded.
The sum of the thickness of the end head template and the dimension B in the vertical length direction of the supporting vertical ribs is equal to the width C of the expansion joint.
The method for constructing the expansion joint by adopting any one of the customized openable bridge expansion joint templates comprises the following steps:
the method comprises the following steps: according to the section size of the box girder familiar with drawings, determining the splicing position of the end template, dividing and customizing openable bridge expansion joint template unit blocks and numbering, cutting the template by adopting a manual mode, marking the cut template, and facilitating splicing;
step two: manually polishing the notches of the templates to ensure that the notches are flat and smooth, and then assembling the single templates according to the serial numbers to finally form a whole block of end template;
step three: connecting an end template and a supporting vertical rib by using a hinge, wherein the sum of the widths of the end template and the supporting vertical rib is the width of the expansion joint;
step four: cleaning the surfaces of the customized openable bridge expansion joint template unit blocks which are manufactured, brushing a release agent, and sequentially assembling the blocks to the end positions of the box girders to be cast according to the numbers;
step five: binding reinforcing steel bars and pouring box girder concrete in sequence, and dismantling the openable bridge expansion joint template after the box girder concrete reaches the design strength;
step six: when the formwork is dismantled, the supporting vertical ribs are knocked along the hinge direction by a hammer and are rotated to be folded, and the whole formwork unit can be pulled out after all the supporting vertical ribs are folded;
step seven: the disassembled template unit blocks need to be cleaned in time and stacked orderly, so that the template unit blocks are convenient to use repeatedly.
In the fourth step, in the process of mounting the box girder end, the openable bridge expansion joint template firstly unfolds the supporting vertical ribs, and attaches the supporting vertical ribs to the end face of the poured box girder, and the end template faces one side of the box girder to be poured; the sideforms and open ended forms are then installed.
The invention has the following beneficial effects:
1. through adopting foretell flexible template, it uses the current bamboo plywood of construction or plank sheathing and metal hinge, and the end template is made to the customization template that can open and shut, makes the end template through the template that can open and shut and utilizes hinge fixed stay vertical rib to support vertical rib and support as box girder end template, end template thickness and vertical rib width sum are bridge expansion joint width, and when concrete placement finishes the maintenance period and breaks down the mould, can easily demolish with the hammer cisoid hitting vertical rib.
2. Through using the customization bridge expansion joint template that can open and shut, with the method of the filling gap of conventional application disposable cystosepiment, change into easy loading and unloading, reuse's die filling mode, realize green construction, showing and improving box girder end and expansion joint quality, reduced construction cost.
3. The invention utilizes the support vertical ribs made of the template to control the size of the expansion joint and support as the end mould, can be repeatedly used for 3-4 times, avoids the use of a disposable foam board and is beneficial to environmental protection.
4. In quality control, the expansion joint size can be controlled more easily by adopting the invention, and the surface of the box girder end head is smoother and smoother.
5. The invention realizes the purpose of improving the quality control of the box girder end by using the existing materials in the construction site, solves the problem that the construction progress is delayed due to insufficient hands in the peak of product manufacturing, reduces the use of non-environment-friendly materials such as foam boards and the like, ensures the quality of the expansion joint and the box girder end, improves the construction efficiency, reduces the construction cost and brings certain economic benefits to enterprises.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a three-dimensional view of the present invention.
FIG. 2 is a top view of the support vertical ribs of the present invention after deployment.
FIG. 3 is a top view of the invention after the vertical support ribs have been closed.
Fig. 4 is a schematic view illustrating the initial installation of the formwork unit in the construction process of the present invention.
Fig. 5 is a schematic view of the box girder during casting in the construction process of the invention.
FIG. 6 is a schematic view of the pouring and curing of the box girder in the construction process of the invention.
Fig. 7 is a schematic view showing the closing of the vertical ribs when the formwork unit is removed in the construction process of the present invention.
Fig. 8 is a schematic view after the formwork units are completely removed in the construction process of the present invention.
In the figure: the construction method comprises the following steps of end template 1, bottom hinge 2, hinge 3, support vertical rib 4, opening and closing support mechanism 5, poured box girder 6, expansion joint 7, opening end template 8, side template 9, box girder 11 to be poured, box girder 12 to be poured initially and box girder 13 to be maintained.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-3, a customized openable bridge expansion joint template comprises an end template 1, wherein a plurality of groups of openable supporting mechanisms 5 are installed on the back surface of the end template 1; the opening and closing supporting mechanism 5 is used for supporting the end template 1 when being unfolded, and the end template 1 is loosened when being rotated and folded. This template can be according to the demand that on-spot case beam-ends mould was established, the template of the corresponding size of customization, has improved work efficiency, has reduced construction cost, pours at the expansion joint moreover and accomplishes afterwards, can be convenient dismantle it, has effectively improved work efficiency, has reduced construction cost.
Furthermore, the size of the end template 1 is determined according to the size of the section of the box girder and is formed by cutting and splicing a plurality of templates. The structure can practically adapt to the use requirements of different sizes.
Furthermore, the opening and closing supporting mechanism 5 comprises supporting vertical ribs 4, and each supporting vertical rib 4 is hinged to the back of the end formwork 1 through hinges 3 with different heights. The opening and closing supporting mechanism 5 ensures that the end template 1 is separated from the support in the stripping process, thereby facilitating the taking out of the whole template.
Further, the end template 1 is made of a wood template, a bamboo plywood, a shaped combined steel template or a cold-formed thin-wall steel plate. The adaptability is enhanced by a plurality of different templates.
Furthermore, the vertical length direction dimension B of the supporting vertical rib 4 is larger than the width direction dimension A, so that the supporting vertical rib can be separated from the end face of the poured box girder after being folded. Through the size, the supporting vertical ribs 4 can be ensured to be separated from the support after rotating and folding, and then gaps are formed between the expansion joints, so that the whole end template can be conveniently detached.
Further, the sum of the thickness of the end head template 1 and the vertical length direction dimension B of the supporting vertical rib 4 is equal to the width C of the expansion joint 7. The size of the expansion joint can be controlled through the size.
Example 2:
referring to fig. 4-8, the method for constructing the expansion joint by using the customized openable bridge expansion joint template comprises the following steps:
the method comprises the following steps: according to the section size of the box girder familiar with a drawing, determining the splicing position of the end template 1, dividing and customizing openable bridge expansion joint template unit blocks and numbering, cutting the template by adopting a manual mode, marking the cut template, and facilitating splicing;
step two: manually polishing the template notches to ensure that the template notches are flat and smooth, and then assembling the single templates according to the serial numbers to finally form a whole end template 1;
step three: connecting an end head template 1 and a supporting vertical rib 4 by using a hinge 3, wherein the sum of the widths of the end head template 1 and the supporting vertical rib 4 is the width of the expansion joint;
step four: cleaning the surfaces of the customized openable bridge expansion joint template unit blocks which are manufactured, brushing a release agent, and sequentially assembling the blocks to the end positions of the box girders to be cast according to the numbers;
step five: binding reinforcing steel bars and pouring box girder concrete in sequence, and dismantling the openable bridge expansion joint template after the box girder concrete reaches the design strength;
step six: during dismantling, the supporting vertical ribs 4 are knocked along the hinge 3 by a hammer and are rotated to be folded, and the whole template unit can be pulled out after all the supporting vertical ribs 4 are folded;
step seven: the disassembled template unit blocks need to be cleaned in time and stacked orderly, so that the template unit blocks are convenient to use repeatedly.
In the fourth step, in the process of installing the box girder end, the openable bridge expansion joint template firstly unfolds the supporting vertical ribs 4, and attaches the supporting vertical ribs to the end face of the poured box girder 6, and the end template 1 faces one side of the box girder 11 to be poured; the sideforms 9 and open ended form 8 are then installed.
The parameter control in the specific implementation process of the invention is as follows:
1. the design of the template is executed according to the current safety technical Specification for construction templates (JGJ162), the specification of the current cold-bending thin-wall steel structure technical Specification (GB50018) is met when cold-bending thin-wall section steel is adopted, and the specification of the current combined steel template (GB/T50214) is met when the sizing combined steel template is adopted, and the design of the wood template and the wood bracket is in accordance with the current wood structure design Standard (GB 50005).
2. The construction requirements of the template should comply with the following regulations:
the back of the template is provided with vertical ribs as a supporting system, and the arrangement of the vertical ribs is carried out according to the requirements of the load and the rigidity of the template. The configuration direction of the vertical ribs is perpendicular to the width direction of the box girder template, the vertical ribs can directly bear the load transmitted by the template, the distance between the vertical ribs is calculated and determined according to the load value and the mechanical property of the template, the overall rigidity of the template structure is enhanced, the flatness is adjusted, and the acting points of the support are arranged on the vertical ribs.
3. The matching plate of the template is determined according to the shape, the geometric dimension and the supporting form of the matching surface. When the board is assembled, a large-specification template is preferably selected as a main board, and templates of other specifications are used as supplements; the plate seam after the plate matching is regular and has no disorder.
4. When the counter-pulling screw rods or other tie bars are arranged and holes need to be drilled in the template, the drilled template can be repeatedly used, and measures are taken to reduce or avoid the holes from being drilled in the template.
5. The surface of the wood formwork that contacts the concrete should be planed and should be kept flat. The joints of the wood template can be made into flat joints, lap joints or tongue-and-groove joints, and when the flat joints are adopted, measures for preventing slurry leakage should be taken; the corners should be filleted or beveled.
6. After the template is installed, the size, the plane position, the top elevation and the like of the template are required to meet the design requirements, and the node connection is required to be firm.
7. The precision of template making and installation respectively accords with the regulations of the table 1 and the table 2:
TABLE 1 tolerance for wood form fabrication
Note: 2m guiding rule and clearance gauge for detecting local unevenness of plate surface
TABLE 2 tolerance to template installation
| Item | Tolerance deviation mm |
| Elevation of beam form | ±10 |
| All component template sizes of superstructure | +5，-0 |
| Beam formwork axis offset | 10 |
| Height difference between surfaces of two adjacent templates | 2 |
| Surface finish of the template | 5 |
| Position of center line of embedded part | 3 |
| Position of central line of reserved hole | 10 |
| Internal dimension of reserved hole interface | +10,-0 |
Claims (4)
1. The utility model provides a method for expansion joint construction is carried out to customization bridge expansion joint template that can open and shut which characterized in that: the customized openable bridge expansion joint template comprises an end template (1), wherein a plurality of groups of openable supporting mechanisms (5) are arranged on the back surface of the end template (1); the opening and closing supporting mechanism (5) is used for supporting the end template (1) when being unfolded, and the end template (1) is loosened when being rotated and folded;
the opening and closing supporting mechanism (5) comprises supporting vertical ribs (4), and each supporting vertical rib (4) is hinged to the back of the end template (1) through a plurality of hinges (3) with different heights;
the vertical length direction dimension B of the supporting vertical rib (4) is larger than the width direction dimension A, so that the supporting vertical rib can be separated from the end face of the poured box girder after being folded;
the sum of the thickness of the end head template (1) and the vertical length direction dimension B of the supporting vertical rib (4) is equal to the width C of the expansion joint (7);
the construction method comprises the following steps:
the method comprises the following steps: according to drawing familiar with the section size of the box girder, determining the splicing position of the end template (1), dividing and customizing openable bridge expansion joint template unit blocks and numbering, cutting the template by adopting a manual mode, marking the cut template, and facilitating splicing;
step two: manually polishing the notches of the templates to ensure the notches to be flat and smooth, and then assembling the single templates according to the serial numbers to finally form a whole block of end template (1);
step three: connecting an end head template (1) and a supporting vertical rib (4) by using a hinge (3), wherein the sum of the thickness of the end head template (1) and the width of the supporting vertical rib (4) is the width of the expansion joint;
step four: cleaning the surfaces of the customized openable bridge expansion joint template unit blocks which are manufactured, brushing a release agent, and sequentially assembling the blocks to the end positions of the box girders to be cast according to the numbers;
step five: binding reinforcing steel bars and pouring box girder concrete in sequence, and dismantling the openable bridge expansion joint template after the box girder concrete reaches the design strength;
step six: when the formwork is dismantled, the supporting vertical ribs (4) are knocked along the hinge (3) by a hammer and are rotated to be folded, and the whole formwork unit can be pulled out after all the supporting vertical ribs (4) are folded;
step seven: the disassembled template unit blocks need to be cleaned in time and stacked orderly, so that the template unit blocks are convenient to use repeatedly.
2. The method for constructing the expansion joint according to the claim 1, which is characterized in that: the size of the end template (1) is determined according to the size of the section of the box girder and is formed by cutting and splicing a plurality of templates.
3. The method for constructing the expansion joint according to the claim 1, which is characterized in that: the end template (1) adopts a wood template, a shaping combined steel template or a cold-bending thin-wall steel plate.
4. The method for constructing the expansion joint by customizing the openable and closable bridge expansion joint template according to claim 1, wherein in the process of installing the end of the box girder, the openable and closable bridge expansion joint template in the fourth step firstly unfolds the supporting vertical ribs (4), attaches the supporting vertical ribs to the end surface of the poured box girder (6), and enables the end template (1) to face one side of the box girder (11) to be poured; then the side form (9) and the open-end form (8) are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110390798.5A CN113174843B (en) | 2021-04-12 | 2021-04-12 | Customized openable bridge expansion joint template and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110390798.5A CN113174843B (en) | 2021-04-12 | 2021-04-12 | Customized openable bridge expansion joint template and construction method |
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| CN113174843A CN113174843A (en) | 2021-07-27 |
| CN113174843B true CN113174843B (en) | 2022-06-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3924556B2 (en) * | 2003-08-04 | 2007-06-06 | ドーエイ外装有限会社 | Wall joint cover device |
| CN102528910A (en) * | 2011-12-23 | 2012-07-04 | 中铁十九局集团第五工程有限公司 | Template system of prefabricated simply support box beam |
| CN103174288A (en) * | 2013-03-15 | 2013-06-26 | 中国十七冶集团有限公司 | Reinforcing method for U-bar hoop formworks of large-section frame column |
| CN207073067U (en) * | 2017-06-30 | 2018-03-06 | 中国铁建大桥工程局集团有限公司 | A kind of assembling die poured for bridge plate |
| CN208586893U (en) * | 2018-07-24 | 2019-03-08 | 中冶建工集团有限公司 | Hinge-type supporting member for double shutterings-supported constructions within the walls |
| CN212176539U (en) * | 2020-04-23 | 2020-12-18 | 中建七局第一建筑有限公司 | Convenient adjustable formwork system of expansion joint |
| CN212671169U (en) * | 2020-07-15 | 2021-03-09 | 中冶建工集团有限公司 | Expansion joint template support frame |
| CN111946062B (en) * | 2020-07-21 | 2021-12-24 | 山东三箭建设工程股份有限公司 | Integral mounting and dismounting tool for integral template of expansion joint and mounting and dismounting method thereof |
| CN212562464U (en) * | 2020-08-24 | 2021-02-19 | 中建海峡建设发展有限公司 | Double-sided template for deformation joint |
| CN112282351A (en) * | 2020-11-28 | 2021-01-29 | 中国二十二冶集团有限公司 | Expansion joint shaping template and construction method thereof |
| CN214939235U (en) * | 2021-04-12 | 2021-11-30 | 中国核工业第二二建设有限公司 | Customization bridge expansion joint template that can open and shut |
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