Construction method of cast-in-situ box girder skylight supporting template
阅读说明：本技术 一种现浇箱梁天窗支撑模板的施工方法 (Construction method of cast-in-situ box girder skylight supporting template ) 是由 郭一贤 何德华 陈建宁 颜苓 陈衡 赵海凝 布振华 杨奇 于 2019-11-08 设计创作，主要内容包括：本发明提供了一种现浇箱梁天窗支撑模板的施工方法,所述施工方法包括如下步骤：将连接件的一端与所述下加强件连接,连接件的另一端穿过所述底模板上的钻孔,通过提升所述连接件的另一端以使所述底模板的四周紧贴已浇筑的箱梁顶板；之后将连接件的另一端与架设在所述天窗上的上支撑件连接；安装天窗钢筋、浇筑混凝土；待混凝土达到设计要求后,切断位于所述天窗上方的所述连接件,拆除所述天窗上方的上支撑件。本发明只需用连接件将底模板、上支撑件、下加强件固定,拆除时仅需剪断已浇筑的箱梁顶板上方的连接件、拆除上支撑件即可,无需较大开孔破坏箱梁天窗的结构,施工简便可行。(The invention provides a construction method of a cast-in-place box girder skylight supporting template, which comprises the following steps: connecting one end of a connecting piece with the lower reinforcing piece, enabling the other end of the connecting piece to penetrate through the drilled hole in the bottom template, and enabling the periphery of the bottom template to be tightly attached to the top plate of the poured box girder by lifting the other end of the connecting piece; then connecting the other end of the connecting piece with an upper supporting piece erected on the skylight; mounting skylight reinforcing steel bars and pouring concrete; and after the concrete meets the design requirement, cutting off the connecting piece above the skylight, and dismantling the upper supporting piece above the skylight. The bottom template, the upper supporting piece and the lower reinforcing piece are fixed only by the connecting piece, the connecting piece above the poured box girder top plate is only required to be cut off and the upper supporting piece is only required to be removed, the structure of the box girder skylight is not required to be damaged by a large opening, and the construction is simple, convenient and feasible.)
1. The construction method of the cast-in-situ box girder skylight support template is characterized in that the support template comprises a bottom template, an upper support piece, a lower reinforcement piece and a connecting piece; the width of the bottom template is greater than that of the skylight; the length of the upper supporting piece and the length of the lower reinforcing piece are both larger than the width of the skylight;
the construction method comprises the following steps:
connecting one end of the connecting piece with the lower reinforcing piece, enabling the other end of the connecting piece to penetrate through the drilled hole in the bottom template, and enabling the periphery of the bottom template to be tightly attached to the top plate of the poured box girder by lifting the other end of the connecting piece; then connecting the other end of the connecting piece with an upper supporting piece erected on the skylight;
mounting skylight reinforcing steel bars and pouring concrete;
and after the concrete meets the design requirement, cutting off the connecting piece above the skylight, and dismantling the upper supporting piece above the skylight.
2. The construction method of the cast-in-place box girder skylight support template according to claim 1, characterized in that the construction method further comprises:
drilling a plurality of boreholes in the bottom form.
3. The construction method of the cast-in-place box girder skylight support template as claimed in claim 1, wherein the width of the bottom template is 5-10 cm wider than the width of the skylight.
4. The construction method of the cast-in-place box girder skylight support template as claimed in claim 1, wherein the length of the upper support member and the length of the lower reinforcement member are both 5-10 cm wider than the width of the skylight.
5. The construction method of the cast-in-place box girder skylight support template as claimed in claim 1, wherein the upper support member is one or more of a batten, a section steel and a steel pipe;
and/or the presence of a gas in the gas,
the lower reinforcing piece is made of battens.
6. The construction method of the cast-in-place box girder skylight support template as claimed in claim 1, wherein the bottom template is a phenolic plate.
7. The construction method of the cast-in-place box girder skylight support template as claimed in claim 6, wherein the thickness of the phenolic plate is 1.8-2.2 cm.
8. The construction method of the cast-in-place box girder skylight support template as claimed in claim 1, wherein the connecting piece is an iron wire.
9. The construction method of the cast-in-place box girder skylight support template as claimed in claim 8, wherein the diameter of the iron wire is not less than 0.7 mm.
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a construction method of a cast-in-place box girder skylight supporting template.
Background
When the conventional cast-in-place box girder is constructed, in order to facilitate the operation of operators, a plurality of skylights need to be arranged on the top plate of each span of the box girder, after the construction is finished, the skylights need to be re-provided with templates for pouring concrete, the conventional skylight supporting templates usually adopt a reverse hanging supporting form of split bolts and steel pipes, and the method has the following technical problems: (1) the split bolt is large in hole and damages the structure of the top plate at the skylight position of the cast-in-place box girder; (2) the split bolts and part of the steel pipes cannot be recycled, so that resource waste is caused; (3) the construction process is complicated.
Disclosure of Invention
Aiming at the problems, the invention provides a construction method of a cast-in-place box girder skylight supporting template.
The purpose of the invention is realized by adopting the following technical scheme:
a construction method of a cast-in-place box girder skylight supporting template comprises a bottom template, an upper supporting piece, a lower reinforcing piece and a connecting piece; the width of the bottom template is greater than that of the skylight; the length of the upper supporting piece and the length of the lower reinforcing piece are both larger than the width of the skylight;
the construction method comprises the following steps:
connecting one end of the connecting piece with the lower reinforcing piece, enabling the other end of the connecting piece to penetrate through the drilled hole in the bottom template, and enabling the periphery of the bottom template to be tightly attached to the top plate of the poured box girder by lifting the other end of the connecting piece; then connecting the other end of the connecting piece with an upper supporting piece erected on the skylight;
mounting skylight reinforcing steel bars and pouring concrete;
and after the concrete meets the design requirement, cutting off the connecting piece above the skylight, and dismantling the upper supporting piece above the skylight.
In an optional embodiment, the construction method further comprises:
drilling a plurality of boreholes in the bottom form.
In an alternative embodiment, the width of the bottom formwork is 5-10 cm wider than that of the skylight.
In an alternative embodiment, the length of the upper support piece and the length of the lower reinforcing piece are both 5-10 cm wider than the width of the skylight.
In an optional embodiment, the upper supporting member is one or more of a batten, a section steel and a steel pipe;
and/or the presence of a gas in the gas,
the lower reinforcing piece is made of battens.
In an alternative embodiment, the bottom form is a phenolic plate.
In an optional embodiment, the thickness of the bottom die plate is 1.8-2.2 cm.
In an alternative embodiment, the connecting member is an iron wire.
In an alternative embodiment, the diameter of the iron wire is not less than 0.7 mm.
The invention has the beneficial effects that: the conventional skylight supporting template usually adopts a counter-hanging supporting form of counter-pull bolts and steel pipes, the counter-pull bolts in the supporting form have too large diameters, required holes are large, the structure of a top plate at the skylight position of the cast-in-place box girder can be damaged, then the counter-pull bolts and the steel pipes positioned below the skylight cannot be recycled, and the resource waste is caused, aiming at the defects of the supporting form, the novel supporting template is adopted, when the supporting template is used for construction, a phenolic plate, an upper supporting piece and a wood square below the skylight are fixed by using iron wires, the construction is convenient, the iron wires above the poured box girder top plate are cut off during the dismounting, the upper supporting piece is dismounted, and compared with the counter-hanging supporting form of the counter-pull bolts and the steel pipes, the larger holes are not needed, and the structure of the top plate at the skylight position of the cast-in-place box girder can not be damaged; secondly, the steel wire is used for fixing, and compared with the utilization of the split bolt, the construction is simpler and more convenient; and moreover, the cost of the iron wires and the battens is low, the cost is saved, the disassembled upper supporting piece can be recycled, and the waste of resources is also avoided.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a sectional view of a support for a cast-in-place box girder according to an embodiment of the present invention.
Reference numerals: the structure comprises a
Detailed Description
The invention is further described with reference to the following examples.
Referring to fig. 1, the cast-in-place box girder skylight supporting template comprises a
In a feasible implementation mode, the
In one possible embodiment, the phenolic board is drilled with a small bore drill to produce a phenolic board having a plurality of drilled holes.
In a possible embodiment, the width of the phenolic plate is 5-10 cm wider than the width of the
In one possible embodiment, the upper support 2 is one or more of a batten, a section steel and a steel pipe. The length of the upper supporting piece 2 is 5-10 cm wider than the width of the
In a feasible embodiment, the lower reinforcing
In a possible embodiment, the connecting
The construction method for construction by using the support template comprises the following steps:
drilling holes on the phenolic plate by using an electric drill with a small aperture, wherein the drilling positions and the drilling number can be set according to engineering requirements;
connecting one end of the connecting
mounting skylight reinforcing steel bars and pouring concrete;
and after the concrete meets the design requirement, cutting off the connecting piece above the
The invention has the beneficial effects that: the conventional skylight supporting template usually adopts a reverse hanging supporting form of split bolts and steel pipes, the diameter of the split bolts in the supporting form is too large, the required holes are also large, the structure of a top plate at the skylight position of the cast-in-place box girder can be damaged, and then the split bolts and the steel pipes positioned below the skylight cannot be recycled, so that the resource waste is caused; secondly, the steel wire is used for fixing, and compared with the utilization of the split bolt, the construction is simpler and more convenient; and moreover, the cost of the iron wires and the battens is low, the cost is saved, the removed battens can be recycled, and the waste of resources is also avoided.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
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