CN114892530A - Arc-shaped body combined template supporting structure of ultrahigh double-layer arc-shaped tie beam and construction method - Google Patents
Arc-shaped body combined template supporting structure of ultrahigh double-layer arc-shaped tie beam and construction method Download PDFInfo
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- CN114892530A CN114892530A CN202210565841.1A CN202210565841A CN114892530A CN 114892530 A CN114892530 A CN 114892530A CN 202210565841 A CN202210565841 A CN 202210565841A CN 114892530 A CN114892530 A CN 114892530A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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
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Abstract
The invention belongs to the technical field of double-layer arc-shaped tie beam construction, and particularly relates to an arc-shaped body combined template supporting structure of an ultrahigh double-layer arc-shaped tie beam and a construction method. The method comprises the steps of measuring and paying off; the lower pier stud scaffold and a first tie beam side formwork are erected, and a first tie beam arc-shaped body bottom formwork is erected; binding a first tie beam steel bar; a top template of the first tie beam arc body is erected; pouring and maintaining concrete for the lower pier stud and the first tie beam; the upper pier stud scaffold and a second tie beam side formwork are erected, and a second tie beam arc-shaped body bottom formwork is erected; binding a second tie beam steel bar; a top template of the second tie beam arc body is erected; and pouring concrete on the upper pier stud and the second tie beam, and removing the formwork for maintenance. The arrangement of the arc-shaped body bottom template and the arc-shaped body supporting base plate effectively reduces the potential safety hazard caused by unstable support of the arc-shaped tie beam template scaffold, and the arrangement of the vibrating opening of the arc-shaped body top template also effectively reduces the potential structural hazard caused by the improper vibration of tie beam concrete.
Description
Technical Field
The invention belongs to the technical field of double-layer arc-shaped tie beam construction, and particularly relates to an arc-shaped body combined template supporting structure of an ultrahigh double-layer arc-shaped tie beam and a construction method.
Background
In the construction of the traditional bridge engineering, in order to meet the field requirements, the tie beams of part of pier columns have the characteristics of large height difference and large section size, and some tie beams are designed into an arc shape for pursuing attractive appearance and better stress performance. The large height difference and the large section size of the tie beam bring certain technical problems to the erection of project frames. In addition, the tie beam is arc-shaped, when the second tie beam frame body is erected, the bottom of the second tie beam frame body is supported on the arc-shaped surface of the first tie beam, so that the erection of the local frame body is unstable, and great potential safety hazards are brought to engineering. After the pier stud template and the tie beam template are erected, when concrete is poured, the tie beam concrete cannot be vibrated in place due to the fact that the tie beam steel template is in a fully closed state, and the safety of an engineering structure cannot be guaranteed.
With the innovation and development of new technologies of bridge and other infrastructure projects in China, the pier stud tie beam steel formwork is urgently needed to be researched and deepened according to the use requirements, and the arc-shaped body combined formwork supporting structure and the construction method which are safe and reliable and can greatly improve the construction quality of the tie beam are achieved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the arc-shaped body combined formwork supporting structure of the ultrahigh double-layer arc-shaped tie beam and the construction method, which can effectively solve the problems of unstable tie beam supporting frame body and improper concrete pouring of the tie beam, improve the construction progress and quality and save the construction cost.
In order to achieve the purpose, the invention adopts the following technical scheme: the construction method of the arc-shaped body combined formwork supporting structure of the ultrahigh double-layer arc-shaped tie beam comprises the following steps,
(1) measuring and paying off;
(2) the lower pier stud scaffold and a first tie beam side formwork are erected, and a first tie beam arc-shaped body bottom formwork is erected;
(3) binding a first tie beam steel bar;
(4) a top template of the first tie beam arc body is erected;
(5) pouring and maintaining concrete for the lower pier stud and the first tie beam;
(6) the upper pier stud scaffold and a second tie beam side formwork are erected, and a second tie beam arc-shaped body bottom formwork is erected;
(7) binding a second tie beam steel bar;
(8) a top template of the second tie beam arc body is erected;
(9) and pouring concrete on the upper pier stud and the second tie beam, and removing the formwork for maintenance.
In order to solve the preferred solution of the present invention,
the concrete steps of the step (1) comprise,
accurately measuring the central elevation, the central axis and the peripheral lines of the pier column from the top surface of the bearing platform according to the center of the pier column and the coordinates of the axis control point, popping the corresponding vertical and horizontal axes of the upright column by using ink lines, and reserving corresponding leads for positioning when erecting a template; carrying out the next procedure after rechecking; after the template is erected to the pier top, the position of the pier stud top cap and the axis control point are accurately measured out from the wire point, and the elevation of the pier top, each reservation, and the position of the pre-buried hole and the part are rechecked.
In order to solve the preferred solution of the present invention,
the concrete steps of the step (2) and the step (6) of erecting the upper pier stud scaffold and the lower pier stud scaffold and installing the second tie beam side formwork comprise,
before the first tie beam side template is installed, floating slurry on the surface is mechanically ground, a salad oil release agent is coated, then the first tie beam side template and an arc-shaped body bottom template are assembled, the arc-shaped body bottom template is supported by vertical channel steel, a horizontal channel steel and an arc-shaped steel template, and the arc-shaped steel template is composed of 6mm steel plates on two sides and 10# channel steel annular ribs; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through M20 bolts for 10# channel steel, and a common tie beam steel template is optimized into an arc-shaped body combined template with a smooth bottom.
In order to solve the preferred solution of the present invention,
the specific steps of the step (3) and the step (7) comprise,
and (4) processing the steel bars into the sizes and radians required by the drawing by using a positioning steel bar processing model, and binding the tie beam steel bars.
In order to solve the preferred solution of the present invention,
the specific steps of the step (4) and the step (8) comprise,
but tie beam arc body top template upper portion sets up two switch concrete mouth that vibrates, closes the mouth apron that vibrates after the concrete vibrates and accomplishes, the mouth material that vibrates is the same with tie beam steel form material, the mouth flange edge that vibrates sets up the flange, reserve M20 bolt hole, apron accessible M20 connecting bolt connects, fix on the tie beam steel form, treat concrete placement to with the mouth parallel and level that vibrates, cover the mouth apron that vibrates, use M20 bolt and steel form to connect fixedly, carry out upper portion residual concrete placement again.
In order to solve the preferred solution of the present invention,
the specific steps of the step (5) and the step (9) comprise,
after the pier stud template is erected and before concrete is poured, mortar is used for plugging a gap between the bottom of the template and a foundation in advance to prevent slurry leakage;
the method comprises the following steps that a string cylinder is arranged before concrete pouring, the pouring height of each layer of concrete is 30-40 cm, a phi 50 insertion type vibrating rod is adopted for concrete tamping, a vibrator is vertically inserted during vibrating, the vibrator is fast in and slow out, the depth of the vibrator inserted into the concrete at the lower layer is 5-10cm, and the moving distance of the vibrator is not more than 1.5 times of the acting radius of the vibrator, namely 45-60 cm;
when the first tie beam is cast with concrete, two switchable concrete vibrating openings are formed in the upper portion of a tie beam template, flanges are arranged on the edges of the vibrating opening cover plates, M20 bolt holes are reserved, and after concrete is vibrated, the concrete is connected through M20 connecting bolts and fixed on a tie beam steel template; and (3) mounting a vibrating opening cover plate after concrete pouring and vibrating are finished, and then performing concrete pouring on the pier stud at the upper part of the tie beam, wherein the pouring height is 1m higher than the top standard of the tie beam.
To solve the preferred embodiment of the present invention, the step (5) further comprises,
when the strength of the concrete is more than or equal to 10MPa, chiseling the laitance on the top of the bearing platform on the concrete with the poured surface, flushing the chiseled concrete surface with pressure water to keep the surface moist but not accumulate water, paving a layer of cement mortar or cement mortar with the same composition as the concrete, and erecting the upper tie beam support frame when the strength of the lower tie beam concrete reaches 75% of the designed strength.
In order to solve the preferred solution of the present invention,
the concrete steps of the step (6) comprise,
before a second tie beam support frame body is erected, an arc-shaped body combined support structure base plate is placed at the top of a first tie beam, and consists of vertical channel steel supports, horizontal channel steel supports and arc-shaped steel templates, wherein the arc-shaped steel templates consist of 6mm steel plates on two sides and 10# channel steel annular ribs; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through a No. 10 channel steel M20 bolt, and the upper tie beam frame body is supported on the horizontal channel steel.
The supporting structure of the arc-shaped body combined template of the ultrahigh double-layer arc-shaped tie beam comprises a first tie beam arc-shaped body supporting structure and a second tie beam arc-shaped body supporting structure, wherein the first tie beam arc-shaped body supporting structure is arranged at the upper end of the second tie beam arc-shaped body supporting structure;
the first tie beam arc-shaped body supporting structure comprises a lower pier stud scaffold, a first tie beam arc-shaped body bottom template arranged at the upper end of the lower pier stud scaffold, a first tie beam arc-shaped body top template arranged above the first tie beam arc-shaped body bottom template, two concrete vibrating openings arranged at the upper end of the first tie beam arc-shaped body top template, and first tie beam side templates arranged at two sides of the lower pier stud scaffold and the first tie beam arc-shaped body bottom template;
the second is said and is tied beam arc body bearing structure including placing in the arc body combination bearing structure backing plate at first tie beam top, locates the upper portion pier stud scaffold on the arc body combination bearing structure backing plate, locates the second of upper portion pier stud scaffold upper end and says and tie beam arc body bottom template, still including locating upper portion pier stud scaffold and second and say and tie beam arc body bottom template both sides and the second of first tie beam side template top and say and tie beam side template.
According to the preferable scheme, the bottom template of the arc-shaped body of the first tie beam, the arc-shaped body combined supporting structure base plate and the bottom template of the arc-shaped body of the second tie beam are all supported by vertical channel steel, horizontal channel steel support and arc-shaped steel templates, and each arc-shaped steel template consists of 6mm steel plates on two sides and 10# channel steel annular ribs; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through M20 bolts for No. 10 channel steel.
The arc-shaped body combined template supporting structure of the ultrahigh double-layer arc-shaped tie beam and the construction method have the advantages that: the arrangement of the arc-shaped body bottom template and the arc-shaped body supporting base plate effectively reduces the potential safety hazard caused by unstable support of the arc-shaped tie beam template scaffold, and the arrangement of the vibrating opening of the arc-shaped body top template also effectively reduces the potential structural hazard caused by the improper vibration of tie beam concrete.
Drawings
FIG. 1 is a schematic view of a connection structure of a first tie beam arc support structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of a connection structure of a second tie beam arc support structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a bottom template of an arc-shaped body and a backing plate of a combined supporting structure of the arc-shaped body according to the embodiment of the invention;
FIG. 4 is a schematic perspective view of a bottom template of an arc-shaped body and a backing plate of a combined supporting structure of the arc-shaped body according to the embodiment of the invention;
FIG. 5 is a schematic top view of an embodiment of an arcuate body top template;
FIG. 6 is a schematic front view of an embodiment of an arcuate body top platen of the present invention;
FIG. 7 is a schematic perspective view of an arc top form according to an embodiment of the present invention;
parts reference number description:
a first tie beam 100, a second tie beam 200, a lower pier stud 300, an upper pier stud 400, a lower pier stud scaffold 1, a first tie beam arc-shaped body bottom template 2, a first tie beam arc-shaped body top template 3, a concrete vibrating opening 4, a first tie beam side template 5, an arc-shaped body combined supporting structure base plate 6, an upper pier stud scaffold 7, a second tie beam arc-shaped body bottom template 8 and a second tie beam side template 9,
the steel plate comprises a vertical channel steel support 10, a horizontal channel steel support 11, an arc steel template 12, double-side steel plates 13 and channel steel annular ribs 14.
Detailed Description
The following further describes the embodiments with reference to the drawings.
Example (b):
as shown in fig. 1-7, the arc-shaped body combined formwork support structure of the ultrahigh double-layer arc-shaped tie beam comprises a first tie beam arc-shaped body support structure and a second tie beam arc-shaped body support structure, wherein the first tie beam arc-shaped body support structure is arranged at the upper end of the second tie beam arc-shaped body support structure;
the first tie beam arc-shaped body supporting structure is used for supporting and preparing a first tie beam 100, and comprises a lower pier stud scaffold 1, a first tie beam arc-shaped body bottom template 2 arranged at the upper end of the lower pier stud scaffold 1, a first tie beam arc-shaped body top template 3 arranged above the first tie beam arc-shaped body bottom template 2, two concrete vibrating openings 4 formed in the upper end of the first tie beam arc-shaped body top template 3, first tie beam side templates 5 arranged on two sides of the lower pier stud scaffold 1 and the two sides of the first tie beam arc-shaped body bottom template 2, and first tie beam side templates 5 used for preparing a lower pier stud 300;
the second is said and is tied roof beam arc body bearing structure and be used for the support preparation of second way tie beam 200, including placing in the arc body combination bearing structure backing plate 6 at first way tie beam 100 top, locate upper portion pier stud scaffold 7 on arc body combination bearing structure backing plate 6, locate second way tie beam arc body bottom template 8 of upper portion pier stud scaffold 7 upper end, the top of second way tie beam arc body bottom template 8 still is equipped with second tie beam arc body cope match-plate pattern, still including locating upper portion pier stud scaffold 7 and second way tie beam arc body bottom template 8 both sides and the second way tie beam side template 9 of first way tie beam side template 5 top, second way tie beam side template 9 is used for preparing upper portion pier stud 400.
The bottom template 2 of the arc-shaped body of the first tie beam, the backing plate 6 of the arc-shaped body combined supporting structure and the bottom template 8 of the arc-shaped body of the second tie beam are all composed of vertical channel steel supports 10, horizontal channel steel supports 11 and arc-shaped steel templates 12, and the arc-shaped steel templates 12 are composed of 6mm bilateral steel plates 13 and 10# channel steel annular ribs 14; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through M20 bolts for No. 10 channel steel.
The construction method of the arc-shaped body combined template supporting structure of the ultrahigh double-layer arc-shaped tie beam comprises the following steps:
1. measuring line
During construction, according to the center of the pier column and the coordinates of the axis control point, the total station is used for accurately measuring the center elevation, the central axis and the peripheral lines of the pier column from the top surface of the bearing platform, the ink lines are used for popping up the corresponding vertical and horizontal axes of the upright column, and the corresponding lead is reserved for positioning during template erection. After the measurement supervision engineer rechecks, the next procedure can be carried out. Considering that the section of pier column is higher, a theodolite is adopted to control the perpendicularity of the pier body in the construction process. After the template is erected to the pier top, the position of the pier top cap and the axis control point are accurately measured and released from the wire point by using a total station, and the elevation of the pier top, each reservation, and the rechecking of the positions of the pre-buried holes and the parts are made.
2. The lower pier stud scaffold and the first tie beam side formwork are erected, and the first tie beam arc-shaped body bottom formwork is erected
The pole setting of lower part pier stud scaffold 1 adopts socket joint type dish knot formula steel pipe support, and the pipe diameter is 60.3mm, and the wall thickness is 3.2mm, and the material is Q355 strength steel, has high strength, high bearing capacity's characteristics. The cross rod is made of Q235 steel with the pipe diameter of 48.3mm and the wall thickness of 2.5 mm. The horizontal diagonal draw bar is made of Q235 steel with the pipe diameter of 42mm and the wall thickness of 2.5 mm. The vertical diagonal rod is made of Q195 steel with a pipe diameter of 42mm and a wall thickness of 2.5 mm.
The vertical rod is strictly connected with the tie beam support frame body, the vertical rod joint is connected through a disc fastener, and the vertical rod is connected with the cross rod through a disc fastener. And (5) starting to set up the support 50-60 cm away from the outer edge of the structure, and adjusting the support on site according to the distance between the cross bars of the disc buckle support.
The vertical distance of the vertical rods is 0.9m, the transverse distance is 0.9m, and the step pitch is 1.5 m. The tie beam supporting mode is that the direction is striden to the perpendicular roof beam of trabecula, and the horizontal total width of tie beam bottom pole setting is 4.5m, and support frame top layer horizontal pole cloth is apart from being 1.0m, and the cantilever length that adjustable bracket stretches out the top layer horizontal pole must not be greater than 0.5m, and the tie beam should set up between two parties apart from the position of roof beam both sides pole setting.
Before the first tie beam side template 5 is installed, floating slurry during concrete pouring last time is mechanically polished, then a salad oil release agent is coated, and then the first tie beam side template 5 and the first tie beam arc-shaped body bottom template 2 are assembled. The bottom template 2 of the arc-shaped body of the first tie beam is composed of a vertical channel steel support 10, a horizontal channel steel support 11 and an arc-shaped steel template 12. The arc-shaped steel template 12 consists of 6mm double- side steel plates 13 and 10# channel steel annular ribs 14; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through M20 bolts for No. 10 channel steel. And optimizing the common tie beam steel template into an arc-shaped body combined template with a smooth bottom. The combined template system solves the technical problems that the construction difficulty of the bottom support of the arc tie beam template is high, and the construction of the support frame body is unstable.
3. First tie beam steel bar binding
And (4) processing the steel bars into the sizes and radians required by the drawing by using a positioning steel bar processing model, and binding the tie beam steel bars.
4. First tie beam arc body top template support
Two switchable concrete vibrating openings 4 are arranged on the upper portion of the first tie beam arc body top template 3. And after the concrete is vibrated, closing the cover plate of the vibrating opening 13, wherein the material of the vibrating opening 13 is the same as that of the first tie beam side template 5. The size of the vibrating port 13 can be determined according to the size of the tie beam or the keel position of the first tie beam side formwork 5. The flange is arranged at the edge of the vibrating cover plate, M20 bolt holes are reserved, and the cover plate can be connected through M20 connecting bolts and fixed on a tie beam steel formwork. Because the arc-shaped tie beam is in a shape with two high ends and a low middle part, the method can fully vibrate the concrete of the tie beam, release air in the concrete pouring process and improve the concrete forming quality. And after the concrete is poured to be level to the vibrating port, covering a vibrating port cover plate, connecting and fixing the vibrating port cover plate and a steel template by using an M20 bolt, and pouring the rest part of the concrete on the upper part. Thereby effectively improving the quality of the concrete entity of the arc-shaped girder.
5. Pouring and maintaining concrete for lower pier stud and first tie beam
After the first tie beam side formwork 5 is erected and before concrete is poured, mortar is used for plugging a gap between the bottom of the first tie beam side formwork 5 and a foundation in advance to prevent slurry leakage.
Because the lower pier stud 300 is higher, in order to avoid the segregation phenomenon caused by the higher concrete falling height during concrete pumping, a string tube is arranged before concrete pouring. The pouring height of each layer of concrete is 30-40 cm, a phi 50 inserted vibrating rod is adopted for concrete tamping, four operators simultaneously vibrate, and the control range of each operator is 1/4 of the area of a pier column. During vibration, the vibrator is vertically inserted, is quickly inserted and slowly discharged, is inserted into the lower layer of concrete to a depth of 5-10cm, and has a movement distance not more than 1.5 times of the action radius of the vibrator, namely 45-60 cm.
When 100 concrete placement of first tie beam, 3 upper portions of first tie beam arc body top formworks set up two but switch concrete mouth 4 that vibrate, 4 sizes of mouth that vibrates can be according to 100 sizes of first tie beam or 5 fossil fragments positions of first tie beam side formworks and confirm. The edge of the cover plate of the vibrating port 4 is provided with a flange, M20 bolt holes are reserved, and the concrete is connected through M20 connecting bolts after vibrating and is fixed on a tie beam steel formwork. And (3) mounting a vibrating opening cover plate after concrete pouring and vibrating are finished, and then performing concrete pouring on the pier stud at the upper part of the first tie beam 100, wherein the pouring height is 1m higher than the top standard of the tie beam. The vibrating opening of the top template 3 of the first tie beam arc-shaped body can enable concrete of the tie beam to be vibrated fully and simultaneously release air generated in the tie beam in the concrete pouring process, so that the concrete forming quality of the tie beam is improved.
And when the strength of the concrete is more than or equal to 10MPa, chiseling the laitance on the top of the bearing platform by manually holding a pneumatic pick for the concrete with the poured surface. And (3) washing the roughened concrete surface with pressure water to keep the surface wet without water accumulation, paving a layer of cement paste (a proper amount of interfacial agent) or cement mortar with the same components as the concrete, and erecting a support frame body of the second tie beam 200 when the concrete strength of the first tie beam 100 reaches 75% of the design strength.
6. The upper pier stud scaffold and the second tie beam side formwork are erected, and the second tie beam arc-shaped body bottom formwork is erected
The pole setting of upper portion pier stud scaffold 7 adopts socket joint type dish knot formula steel pipe support, and the pipe diameter is 60.3mm, and the wall thickness is 3.2mm, and the material is Q355 strength steel, has high strength, high bearing capacity's characteristics. The cross rod is made of Q235 steel with the pipe diameter of 48.3mm and the wall thickness of 2.5 mm. The horizontal diagonal draw bar is made of Q235 steel with the pipe diameter of 42mm and the wall thickness of 2.5 mm. The vertical diagonal rod is made of Q195 steel with a pipe diameter of 42mm and a wall thickness of 2.5 mm.
Support body pole setting and tie beam support body are forbidden to link to each other, and the pole setting connects and adopts a set fastener to connect, and the pole setting adopts a set fastener to connect with the horizontal pole. And (5) starting to set up the support 50-60 cm away from the outer edge of the structure, and adjusting the support on site according to the distance between the cross bars of the disc buckle support.
The vertical distance of the vertical rods of the support frame body is 0.9m, the transverse distance is 0.9m, and the step pitch is 1.5 m. The tie beam supporting mode is that the direction is striden to the perpendicular roof beam of trabecula, and the horizontal total width of tie beam bottom pole setting is 4.5m, and support frame top layer horizontal pole cloth is apart from being 1.0m, and the cantilever length that adjustable bracket stretches out the top layer horizontal pole must not be greater than 0.5m, and the tie beam should set up between two parties apart from the position of roof beam both sides pole setting.
Before an upper pier stud scaffold 7 is erected, an arc-shaped body combined supporting structure base plate 6 is placed at the top of a first tie beam 100. The arc-shaped body combined supporting structure base plate 6 is composed of a vertical channel steel support 10, a horizontal channel steel support 11 and an arc-shaped steel template 12. The arc-shaped steel template 12 consists of 6mm double- side steel plates 13 and 10# channel steel annular ribs 14; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through M20 bolts for No. 10 channel steel. The upper tie beam frame body is supported on the horizontal channel steel. The stability of the frame body is improved. Physical damage to the first tie beam concrete caused by excessive local pressure is reduced.
7. Binding of second tie beam steel bar
And (4) processing the steel bars into the sizes and radians required by the drawing by using a positioning steel bar processing model, and binding the tie beam steel bars.
8. Second tie beam arc body top template support
Same as in step 4.
9. Pouring and demolding maintenance of concrete of upper pier stud and second tie beam
Same as step 5.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. The construction method of the arc-shaped body combined template supporting structure of the ultrahigh double-layer arc-shaped tie beam is characterized by comprising the following steps of: the method comprises the following steps of,
(1) measuring and paying off;
(2) the lower pier stud scaffold and a first tie beam side formwork are erected, and a first tie beam arc-shaped body bottom formwork is erected;
(3) binding a first tie beam steel bar;
(4) a top template of the first tie beam arc body is erected;
(5) pouring and maintaining concrete for the lower pier stud and the first tie beam;
(6) the upper pier stud scaffold and a second tie beam side formwork are erected, and a second tie beam arc-shaped body bottom formwork is erected;
(7) binding a second tie beam steel bar;
(8) a top template of the second tie beam arc body is erected;
(9) and pouring concrete on the upper pier stud and the second tie beam, and removing the formwork for maintenance.
2. The construction method of the arc-shaped body combined formwork support structure of the ultrahigh double-layer arc-shaped tie beam according to claim 1, characterized in that:
the concrete steps of the step (1) comprise,
accurately measuring the central elevation, the central axis and the peripheral lines of the pier column from the top surface of the bearing platform according to the center of the pier column and the coordinates of the axis control point, popping the corresponding vertical and horizontal axes of the upright column by using ink lines, and reserving corresponding leads for positioning when erecting a template; carrying out the next procedure after rechecking; after the template is erected to the pier top, the position of the pier stud top cap and the axis control point are accurately measured out from the wire point, and the elevation of the pier top, each reservation, and the position of the pre-buried hole and the part are rechecked.
3. The construction method of the arc-shaped body combined formwork support structure of the ultrahigh double-layer arc-shaped tie beam according to claim 1, characterized in that:
the concrete steps of the step (2) and the step (6) of erecting the upper pier stud scaffold and the lower pier stud scaffold and installing the second tie beam side formwork comprise,
before a first tie beam side template is installed, floating slurry on the surface is mechanically polished, a salad oil release agent is coated, then the first tie beam side template and an arc-shaped body bottom template are assembled, the arc-shaped body bottom template is supported by vertical channel steel, supported by horizontal channel steel and composed of arc-shaped steel templates, and each arc-shaped steel template is composed of 6mm steel plates on two sides and 10# channel steel annular ribs; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through M20 bolts for 10# channel steel, and a common tie beam steel template is optimized into an arc-shaped body combined template with a smooth bottom.
4. The construction method of the arc-shaped body combined formwork support structure of the ultrahigh double-layer arc-shaped tie beam according to claim 1, characterized in that:
the specific steps of the step (3) and the step (7) comprise,
and (4) processing the steel bars into the sizes and radians required by the drawing by using a positioning steel bar processing model, and binding the tie beam steel bars.
5. The construction method of the arc-shaped body combined formwork support structure of the ultrahigh double-layer arc-shaped tie beam according to claim 1, characterized in that:
the specific steps of the step (4) and the step (8) comprise,
but tie beam arc body top template upper portion sets up two switch concrete mouth that vibrates, closes the mouth apron that vibrates after the concrete vibrates and accomplishes, the mouth material that vibrates is the same with tie beam steel form material, the mouth flange edge that vibrates sets up the flange, reserve M20 bolt hole, apron accessible M20 connecting bolt connects, fix on the tie beam steel form, treat concrete placement to with the mouth parallel and level that vibrates, cover the mouth apron that vibrates, use M20 bolt and steel form to connect fixedly, carry out upper portion residual concrete placement again.
6. The construction method of the arc-shaped body combined formwork support structure of the ultrahigh double-layer arc-shaped tie beam according to claim 1, characterized in that:
the specific steps of the step (5) and the step (9) comprise,
after the pier stud template is erected and before concrete is poured, mortar is used for plugging a gap between the bottom of the template and a foundation in advance to prevent slurry leakage;
the method comprises the following steps that a string cylinder is arranged before concrete pouring, the pouring height of each layer of concrete is 30-40 cm, a phi 50 insertion type vibrating rod is adopted for concrete tamping, a vibrator is vertically inserted during vibrating, the vibrator is fast in and slow out, the depth of the vibrator inserted into the concrete at the lower layer is 5-10cm, and the moving distance of the vibrator is not more than 1.5 times of the acting radius of the vibrator, namely 45-60 cm;
when the first tie beam is cast with concrete, two switchable concrete vibrating openings are formed in the upper portion of a tie beam template, flanges are arranged on the edges of the vibrating opening cover plates, M20 bolt holes are reserved, and after concrete is vibrated, the concrete is connected through M20 connecting bolts and fixed on a tie beam steel template; and (3) mounting a vibrating opening cover plate after concrete pouring and vibrating are finished, and then performing concrete pouring on the pier stud at the upper part of the tie beam, wherein the pouring height is 1m higher than the top standard of the tie beam.
7. The construction method of the arc-shaped body combined formwork support structure of the ultrahigh double-layer arc-shaped tie beam according to claim 6, characterized in that: the step of step (5) may further comprise,
when the strength of the concrete is more than or equal to 10MPa, chiseling the laitance on the top of the bearing platform on the concrete with the poured surface, flushing the chiseled concrete surface with pressure water to keep the surface moist but not accumulate water, paving a layer of cement mortar or cement mortar with the same composition as the concrete, and erecting the upper tie beam support frame when the strength of the lower tie beam concrete reaches 75% of the designed strength.
8. The construction method of the arc-shaped body combined formwork support structure of the ultrahigh double-layer arc-shaped tie beam according to claim 1, characterized in that:
the concrete steps of the step (6) comprise,
before a second tie beam support frame body is erected, an arc-shaped body combined support structure base plate is placed at the top of a first tie beam, and consists of vertical channel steel supports, horizontal channel steel supports and arc-shaped steel templates, wherein the arc-shaped steel templates consist of 6mm steel plates on two sides and 10# channel steel annular ribs; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through a No. 10 channel steel M20 bolt, and the upper tie beam frame body is supported on the horizontal channel steel.
9. A support structure for an arcuate body segmented template of an ultra-high double-deck arcuate tie beam, the support structure being constructed by the method of any one of claims 1 to 8, wherein: the supporting structure comprises a first tie beam arc-shaped body supporting structure and a second tie beam arc-shaped body supporting structure, and the first tie beam arc-shaped body supporting structure is arranged at the upper end of the second tie beam arc-shaped body supporting structure;
the first tie beam arc-shaped body supporting structure comprises a lower pier stud scaffold, a first tie beam arc-shaped body bottom template arranged at the upper end of the lower pier stud scaffold, a first tie beam arc-shaped body top template arranged above the first tie beam arc-shaped body bottom template, two concrete vibrating openings arranged at the upper end of the first tie beam arc-shaped body top template, and first tie beam side templates arranged at two sides of the lower pier stud scaffold and the first tie beam arc-shaped body bottom template;
the second is said and is tied beam arc body bearing structure including placing in the arc body combination bearing structure backing plate at first tie beam top, locates the upper portion pier stud scaffold on the arc body combination bearing structure backing plate, locates the second of upper portion pier stud scaffold upper end and says and tie beam arc body bottom template, still including locating upper portion pier stud scaffold and second and say and tie beam arc body bottom template both sides and the second of first tie beam side template top and say and tie beam side template.
10. The support structure of the arcuate body segmented template of an ultra-high double-deck arcuate tie beam of claim 9, wherein: the bottom template of the arc-shaped body of the first tie beam, the arc-shaped body combined supporting structure base plate and the bottom template of the arc-shaped body of the second tie beam are all supported by vertical channel steel, horizontal channel steel support and arc-shaped steel templates, and each arc-shaped steel template consists of 6mm steel plates on two sides and 10# channel steel annular ribs; 10# channel steel is used for supporting the vertical and horizontal channel steel, and the channel steel is arranged at intervals of 235 mm; the bottom of the vertical channel steel support is connected and fixed with the horizontal channel steel support through M20 bolts for No. 10 channel steel.
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