CN108331342A - Template system of arc beam and construction method thereof - Google Patents

Abstract

A formwork system for circular arc beams and a construction method thereof, wherein the formwork system includes a beam bottom formwork structure, a beam side formwork structure and a first pair of tension bolts; the beam bottom formwork structure includes a beam bottom formwork panel and a beam bottom back flute; The long axis of the beam bottom back flute is an arc line, and the arc line radian is compatible with the arc beam long axis arc; the long axis of the beam bottom formwork panel is an arc line, and the arc line arc line is in line with the The radian of the long axis of the beam is compatible; the beam side formwork structure includes the beam side formwork panel, the beam side secondary back corrugation and the beam side main back corrugation; the horizontal section of the beam side formwork panel is arc-shaped, and the arc of the arc is the same Corresponding to the curvature of the longitudinal side of one side; there is a set of secondary corrugations on the beam side, and each beam side secondary corrugation is fixedly connected with the beam side formwork panel; there is a second corrugation between two adjacent beam side secondary corrugations. Pull bolts. The invention solves the technical problem that both the forming effect and the construction quality fail to meet the design requirements when the arc beam is constructed by the traditional construction method.

Description

Formwork system and construction method of circular arc beam

technical field

The invention belongs to the field of building construction, and in particular relates to a formwork system for circular arc beams and a construction method thereof.

Background technique

With the vigorous development of the construction industry, in order to pursue the diversification of architectural structures, there are more and more arc-shaped buildings. Looking from the outside, the arc gives people a sense of elegance; from the inside, it gives people a sense of centripetal. However, while ensuring the beauty of the arc building, it will inevitably increase the difficulty of construction. Especially for the construction of the beam at the arc, if the ordinary method is used for construction from construction setting-out to formwork support, the forming effect and construction quality will not meet the design requirements.

Contents of the invention

The purpose of the present invention is to provide a formwork system and construction method for circular arc beams, and to solve the technical problem that the traditional construction method can not meet the design requirements in terms of the forming effect and construction quality of the circular arc beams.

In order to achieve the above object, the present invention adopts the following technical solutions.

A formwork system of an arc beam, which is erected on a scaffold below the arc beam; the formwork system includes a beam bottom formwork structure, a beam side formwork structure and a first pair of tension bolts; the beam bottom formwork structure includes a beam bottom formwork structure Formwork panel and beam bottom back flute; said beam bottom back flute has a group, and is arranged on the scaffold along the horizontal parallel interval; wherein the long axis of each beam bottom back flute is an arc line, and the arc line The arc of the beam is adapted to the arc of the long axis of the arc beam; the formwork panel at the bottom of the beam is horizontally erected on the back corrugated at the bottom of the beam, and is arranged along the entire length of the bottom surface of the arc beam to be poured; the long axis of the formwork panel at the bottom of the beam is An arc line, and the radian of the arc line is adapted to the arc of the long axis of the arc beam; there are two beam side formwork structures, which are respectively arranged along the longitudinal sides of the two sides of the arc beam to be poured; wherein, Each beam side formwork structure includes a beam side formwork panel, a beam side secondary back corrugation and a beam side main back corrugation; the horizontal section of the beam side formwork panel is arc-shaped, and the arc of the arc is the same as the arc to be poured. The radian of the longitudinal side of the corresponding side of the beam is adapted; there is a group of secondary back corrugations on the beam side, which are arranged at intervals along the arc extension direction of the horizontal section of the beam side formwork panel, and the distance between each beam side secondary back corrugation and the beam side formwork panel There is a fixed connection between each two adjacent beam side secondary back flutes; a second pair of tension bolts is connected along the vertical interval between each two adjacent beam side back flutes; the main back flute on the beam side has a group, which is connected to the beam side at vertical parallel intervals The outer side of the secondary back flute, and the main back flute on each beam side are arc-shaped; the first pair of tension bolts are connected between the two sides of the arc beam and the corresponding main back flute on the beam side.

Preferably, the cross-section of the circular arc beam is T-shaped, and a flange bottom formwork structure is set up under the flanges on both sides of the circular arc beam; the flange bottom formwork structure includes a flange bottom formwork panel, a flange secondary The back flute and the main back flute of the flange; the side edge of the flange bottom template panel close to the arc beam web is an arc line, and this side is close to the web of the arc beam; the wing The edge and secondary back flute are arranged at intervals along the transverse direction, and each flange secondary back flute is connected to the flange bottom formwork panel through the first fastener; the flange main back flute has a set of longitudinal intervals arranged on the flange The bottom of the secondary back flute, and the main back flute of each flange is correspondingly erected on the scaffold;

The flange on one side of the circular arc beam is connected to the floor, and the flange side formwork panel is set up on the outer surface of the flange on the other side of the circular arc beam; the bottom of the flange side formwork panel is connected to the wing on the corresponding side. The bottom of the flange secondary back flute is flush, and is fixedly connected with the flange secondary back flute through the second fastener.

Preferably, the top of the beam side formwork structure is supported on the bottom of the flange bottom formwork panel; the bottom of the beam side formwork structure exceeds the bottom surface of the circular arc beam to be poured and is supported on the horizontal bar of the scaffold at the bottom, Among them, the length of the excess part is 100mm ~ 150mm;

The beam bottom formwork structure is laid on the horizontal bar of the scaffold at the bottom, and is located between the beam side formwork structures on both sides.

Preferably, the distance between two adjacent beam side secondary back flutes is not greater than 250mm; wherein, each beam side secondary back flute is bonded to the beam side formwork panel through adhesive glue; on the side of the beam side secondary back flute , There are through holes passing through the second pair of tension bolts spaced apart vertically; the distance between two vertically adjacent second pair of tension bolts is not greater than 500mm;

The main back flute on the beam side is a double steel pipe back flute; the two ends of the first pair of pull bolts are respectively inserted in the gap between the two steel pipes on the main back flute on the beam side and fixed.

Preferably, the beam bottom formwork panel is a 3D printed formwork, and the beam bottom formwork panel and the beam bottom secondary back flute are correspondingly connected by a third fastener.

Preferably, the top of the scaffolding pole below the arc beam is correspondingly provided with a horizontal support; wherein, each horizontal support is in the shape of an arc and is arranged along the long axis of the arc beam; the horizontal support Supported under the horizontal bar at the bottom of the beam side formwork structure and the beam bottom formwork structure;

The bottom corresponding pad of the pole of described scaffold is provided with spacer.

A construction method of a formwork system comprises the following steps.

Step 1, making the beam bottom formwork panel and the beam bottom secondary back flute of the beam bottom formwork structure, and simultaneously making the beam side formwork panel, beam side secondary back flute and beam side main back flute of the beam side formwork structure.

Step 2, measuring and setting out: the construction setting out of the circular arc beam adopts the chord distance method to carry out on-site setting out.

Step 3, pre-assemble the beam side formwork structure: glue the beam side secondary back flute on the outside of the beam side formwork panel, the distance between two adjacent beam side secondary back flutes shall not be greater than 250mm; The bolts are inserted into the corresponding through-holes on the side back of the adjacent beam, and tightened to fix.

Step 4, set up the scaffolding at the bottom of the beam: set up the scaffolding under the arc beam to be poured, and set the horizontal support on the top of the vertical pole under the arc beam.

Step 5, laying the beam bottom formwork structure: Lay the beam bottom secondary corrugation on the horizontal bar at the top of the horizontal support, and the beam bottom secondary corrugations on both sides are fixed with connectors to realize the radian of the beam bottom secondary corrugation; then the beam bottom The formwork panel is placed at the design position according to the drawing, and the formwork panel at the bottom of the beam is adjusted and connected with the secondary back corrugation at the bottom of the beam with the third fastener as a whole.

Step 6, install the beam side formwork structure at the longitudinal side of the inner side of the arc beam; install the beam side formwork structure pre-assembled in step 3 on the longitudinal side of the inner side of the arc beam according to the way the beam is supported. Fix the beam side formwork structure.

Step seven, binding the steel bars of the arc beams.

Step 8, combine the beam side formwork structure on the outer longitudinal side of the circular arc beam; after the steel bars are bound, install the beam side formwork structure pre-assembled in step 3 on the longitudinal side of the outer side of the circular arc beam, and wait for the beam side After the formwork structure is installed, review the position of the two beam side formwork structures; then install the beam side main back ribs on both sides of the arc beam and connect the first pair of pull bolts.

Step nine, concrete pouring.

Preferably, the method for making the formwork structure on the beam side in step 1 is as follows: according to the height of the arc beam, the secondary back corrugation on the beam side is made, and the length of the secondary back corrugation on the beam side exceeds the height of the arc beam by 100 mm to 150 mm; Through holes are set on the two sides of the container at a position not less than 200mm from both ends;

Make beam side formwork panels according to the height and length of arc beams;

Preferably, the method for making the formwork structure at the bottom of the beam in step 1 is as follows: establish the BIM model of the arc beam through revit software, input the parameters of the arc beam into the BIM model, and finally connect with the 3D printer through the revit output port, Use the 3D printer to completely print the beam bottom formwork panel according to the model parameters.

Preferably, the method of measuring and setting out the arc beam in step 2 is specifically: the arc c ₁ c _n of the arc beam in the design drawing is known, and the parallel lines a ₁ a _n and b ₁ of the chord c ₁ c _n are known b _n , divide a ₁ a _n into several segments as a ₁ a ₂ , a ₂ a ₃ ... a _n-1 a _n , divide b ₁ b _n into several segments as b ₁ b ₂ , b ₂ b ₃ ... b _n-1 b _n , connect a ₁ b ₁ , a ₂ b ₂ , a ₃ b ₃ ...... a _n b _n to make height h ₁ , h ₂ , h ₃ ... ...h _n , loss of height h ₁ , h ₂ , h ₃ ...h _n intersects arc c ₁ c _n at c ₁ , c ₂ , c ₃ ...c _n ; Then _locate the coordinates of c ₁ , c ₂ , c ₃ .

Preferably, the method of measuring and setting out the circular arc beam in step 2 adopts the method of optimizing the calculation of loss height h _n and determining the positions of a ₁ a ₁₁ and b ₁ b ₁₁ : firstly, use the computer drawing method to directly measure the loss height h ₁ , h ₂ , h ₃ .....h _n , and then locate the points a ₁ , a ₂ , a ₃ ...a _n in the design drawings according to the grid. The positional relationship between the central axis of the grid, find out the positional relationship between b ₁ , b ₂ , b ₃ ... b _n and the central axis of the grid at the same time, and then release a ₁ a _n , b ₁ at the construction site b _n two line segments, and then according to a ₁ a _n , b ₁ b _n and h _n lines, locate the arc c ₁ c _n line of the arc beam.

Compared with the prior art, the present invention has the following characteristics and beneficial effects.

1. The formwork system in the present invention adopts arc-shaped beam bottom formwork structure and beam side formwork structure, wherein the beam bottom formwork structure and beam side formwork structure are designed according to the structural parameters of the arc beam to be constructed, which greatly ensures the circular Forming quality of arc beam concrete after pouring.

2. In the beam side formwork structure in the present invention, the beam side secondary back flute is bonded on the beam side formwork panel with adhesive, and the second pair of pull bolts is connected between adjacent beam side secondary back flutes, and the beam side This design of the side formwork structure not only increases the stability of the beam side formwork structure, but also pre-connects the beam side back flute to the beam side formwork panel, which greatly reduces the construction difficulty, especially for long-span arc beams. construction.

3. In the construction method of the present invention, set out the line by measuring, lay the bottom formwork, add side forms, and carry out normal pouring of concrete after the formwork is closed. Finally, after the strength meets the condition requirements, the circular arc beam formwork is removed. The principle of dismantling first removes the formwork and moves it to the upper layer for recycling, which solves the technical problem that the forming effect and construction quality of the circular arc beam cannot meet the design requirements in the traditional construction method.

4. In the construction method of the present invention, the construction setting out of the circular arc beam adopts the chord branch distance method for on-site setting out, and c ₁ , c ₂ , c ₃ ..... in determining the arc c ₁ c _n For the coordinates of .c _n , draw parallel lines a ₁ a _n and b ₁ b _n outside the chord c ₁ c _n , and use the two parallel lines to determine the coordinates to ensure the accuracy of the coordinates.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of the arrangement of circular arc beams in the present invention.

Fig. 2 is a schematic cross-sectional view of an arc beam in the present invention.

Fig. 3 is a schematic structural diagram of the template system in the present invention.

Fig. 4 is a schematic diagram of the detailed structure of the beam bottom formwork structure and the beam side formwork structure of the formwork system in the present invention.

Fig. 5 is a schematic front view of the connection structure between the formwork panel on the side of the beam and the secondary corrugation on the side of the beam in the present invention.

Fig. 6 is a schematic diagram of a horizontal section of the connection structure between the formwork panel on the side of the middle beam and the secondary corrugation on the side of the beam in the present invention.

Fig. 7 is a schematic side view of the connection structure between the formwork panel on the side of the middle beam and the secondary corrugation on the side of the beam in the present invention.

Fig. 8 is a schematic diagram of measurement and setting-out of arc beams in the construction method of the present invention.

Reference signs: 1-arc beam, 2-scaffolding, 2.1-horizontal rod, 2.2-vertical rod, 3-the first pair of pull bolts, 4-beam bottom formwork panel, 5-beam bottom back corrugated, 6-beam Side formwork panel, 7-beam side secondary back flute, 8-beam side main back flute, 9-second pair of tension bolts, 10-flange bottom formwork panel, 11-flange secondary back flute, 12-flange main back Corrugation, 13-first fastener, 14-flange side formwork panel, 15-second fastener, 16-through hole, 17-third fastener, 18-horizontal support, 19-pad.

Detailed ways

As shown in Figure 1-7, the formwork system of this arc beam is set up on the scaffold 2 under the arc beam 1; The beam bottom formwork structure includes a beam bottom formwork panel 4 and a beam bottom secondary back corrugation 5; the beam bottom secondary back corrugation 5 has a group and is arranged on the scaffold 2 along the horizontal parallel interval; wherein each beam bottom secondary The long axis of the back flute 5 is an arc line, and the radian of the arc line is adapted to the arc of the long axis of the arc beam 1; The bottom surface of the pouring arc beam 1 is set to be long; the long axis of the beam bottom formwork panel 4 is an arc line, and the arc of the arc line is adapted to the arc of the arc beam 1 long axis; the beam side formwork structure There are two, respectively arranged along the longitudinal sides of both sides of the circular arc beam 1 to be poured; wherein, each beam side formwork structure includes a beam side formwork panel 6, a beam side secondary back flute 7 and a beam side main back flute 8. The horizontal section of the beam side template panel 6 is arc-shaped, and the arc of the arc is adapted to the arc of the longitudinal side of the corresponding side of the arc beam 1 to be poured; the beam side secondary back 7 has a group, Arranged at intervals along the arc extension direction of the horizontal section of the beam side formwork panel 6, and each beam side secondary back flute 7 is fixedly connected to the beam side formwork panel 6; between every two adjacent beam side secondary back flutes 7 The second pair of pull bolts 9 are connected at vertical intervals; the beam side main back flute 8 has a group, which is connected to the outside of the beam side secondary back flute 7 along the vertical parallel interval, and each beam side main back flute 8 are all arc-shaped; the first pair of pull bolts 3 are connected between the two sides of the arc beam 1 and the corresponding main back ribs 8 on the beam side.

In this embodiment, each component in the formwork system is manufactured by stereotyped processing.

In this embodiment, the cross-section of the circular arc beam 1 is T-shaped, and a flange bottom formwork structure is set up under the flanges on both sides of the circular arc beam 1; the flange bottom formwork structure includes a flange bottom formwork panel 10. Flange secondary back flute 11 and flange main back flute 12; the side edge of the flange bottom template panel 10 close to the web side of the arc beam 1 is an arc line, and the side edge is close to the arc line On the web of the beam 1; the flange secondary back flute 11 is arranged at intervals along the transverse direction, and each flange secondary back flute 11 is connected to the flange bottom formwork panel 10 through a first fastener 13; the wing There are one set of main flange back flutes 12 arranged longitudinally at the bottom of the flange secondary back flutes 11, and each flange main back flute 12 is set up on the scaffold 2 correspondingly

The flange on one side of the circular arc beam 1 is connected to the floor, and the flange side formwork panel 14 is set up on the outer surface of the flange on the other side of the circular arc beam 1; the bottom of the flange side formwork panel 14 is connected to the corresponding The bottom of the flange secondary back flute 11 on one side is flush, and is fixedly connected to the flange secondary back flute 11 through the second fastener 15 .

In this embodiment, the top of the beam side formwork structure is supported on the bottom of the flange bottom formwork panel 10; the bottom of the beam side formwork structure exceeds the bottom surface of the arc beam 1 to be poured and is supported on the scaffolding 2 at the bottom On the horizontal bar 2.1, the length of the excess part is 100mm-150mm;

The beam bottom formwork structure is laid on the horizontal bar 2.1 of the bottom scaffold 2, between the beam side formwork structures on both sides.

In this embodiment, the distance between two adjacent beam side secondary corrugations 7 is not more than 250mm; wherein, each beam side secondary corrugation 7 is bonded to the beam side formwork panel 6 through adhesive glue; On the side of the back flute 7, through holes 16 passing through the second pair of tension bolts 9 are vertically spaced apart; the distance between the vertically adjacent two second pair of tension bolts 9 is not greater than 500mm;

The main back flute 8 on the beam side is a double steel pipe back flute; the two ends of the first pair of tension bolts 3 are respectively inserted in the gap between the two steel pipes of the main back flute 8 on the beam side and fixed.

In this embodiment, there are multiple groups of the second pair of tension bolts 9, wherein each group of second pair of tension bolts 9 is vertically parallel and spaced between the secondary back corrugations 7 on the side of adjacent beams; the through holes 16 are The side of the beam side secondary corrugation 7 is mechanically drilled in advance, and the hole width is 16mm; in order to ensure the normal insertion of the second pair of tension bolts 9 and avoid the collision of the same row of bolts, the hole positions of the second pair of tension bolts 9 in two adjacent groups are staggered Arrangement; according to the beam height of the circular arc beam 1, among the holes of the second pair of tie bolts 9 in the same group, the upper and lower rows of holes shall not exceed 500mm; among the holes of the second pair of tie bolts 9 in two adjacent groups, the corresponding The hole positions of the two second pair of pull bolts 9 are vertically spaced by 50mm.

In this embodiment, the beam bottom formwork panel 4 is a 3D printing template, and data such as radians are directly input into the 3D printer, and the 3D finished product is printed out by adding template materials; Use the third fastener 17 for corresponding connection.

In this embodiment, the top of the vertical pole 2.2 of the scaffold 2 below the arc beam 1 is correspondingly provided with a horizontal support 18; wherein, each horizontal support 18 is in the shape of an arc and along the long axis direction of the arc beam 1 The overall length is set; the horizontal support 18 is supported under the horizontal bar 2.1 at the bottom of the beam side formwork structure and the beam bottom formwork structure;

The bottom of the pole 2.2 of the scaffold 2 is provided with a spacer 19 corresponding to the pad.

In this embodiment, the scaffold 2 adopts fastener type steel pipes, two vertical poles 2.2 are supported at the bottom of the circular arc beam 1, and a horizontal support 18 is pushed back at the top, between the horizontal poles 2.1 at the bottom of the formwork structure at the beam bottom, The bottom of the beam bottom secondary corrugation 5 is provided with a beam bottom main corrugation along the longitudinal parallel interval, and the beam bottom main corrugation is made of round steel pipe. After measuring the leveling of the flange bottom formwork structure and the beam bottom formwork structure with a level, the joints between the horizontal bar 2.1 and the vertical bar 2.2 are locked with cross fasteners, and the tightening torque should not be less than 40N·m and should not be greater than 65N· m.

In this embodiment, the bottom of the beam bottom formwork panel 4 and the outer sides of the two outermost beam bottom back corrugations 5 are fixed with cross fasteners to realize the radian of the beam bottom back corrugation 5, and the 3D printed beam bottom formwork panels 4 According to the production label, place it in the specified position according to the drawing; after fine-tuning the position of the beam bottom formwork panel 4 through the hanging wire pendant on site, use wooden square nails to connect the beam bottom formwork panel 4 and The bottom of the beam has 5 nails on the back corrugated as a whole.

In this embodiment, the first fastener 13 , the second fastener 15 and the third fastener 17 are all made of wooden square nails.

Of course, in other embodiments, the first fastener 13 , the second fastener 15 and the third fastener 17 may also use other types of steel nails such as screws or self-tapping screws.

The construction method of this formwork system includes the following steps.

Step 1: Make the beam bottom formwork panel 4 and the beam bottom secondary back flute 5 of the beam bottom formwork structure, and simultaneously make the beam side formwork panel 6, the beam side secondary back flute 7 and the beam side main back flute 8 of the beam side formwork structure.

Step 2, measuring and setting out: the construction setting out of the circular arc beam 1 adopts the chord distance method to carry out on-site setting out, as shown in Figure 8.

Step 3, pre-assemble the beam side formwork structure: bond the beam side secondary back corrugations 7 to the outside of the beam side formwork panel 6, and the distance between two adjacent beam side secondary back corrugations 7 is not greater than 250mm; Two pairs of pull bolts 9 are inserted into the corresponding through holes 16 on the secondary back corrugated 7 of the adjacent beam side, and are tightened and fixed.

Step 4, setting up the scaffolding 2 at the bottom of the beam: erecting the scaffolding 2 under the circular arc beam 1 to be poured, and setting a horizontal support 18 on the top of the vertical pole 2.2 of the scaffolding 2 under the circular arc beam 1 correspondingly.

Step 5, laying the beam bottom formwork structure: Lay the beam bottom back flute 5 on the horizontal bar 2.1 on the top of the horizontal support 18, and the beam bottom back flute 5 on both sides are fixed by connectors to realize the radian of the beam bottom back flute 5 Then place the beam bottom formwork panel 4 at the design position according to the drawing, adjust the beam bottom formwork panel 4 and use the third fastener 17 to connect with the beam bottom secondary back flute 5 as a whole.

Step 6, install the beam side formwork structure at the longitudinal side of the inner side of the arc beam 1, where the side where the arc beam 1 is connected to the floor is the inner side; the beam side formwork structure pre-assembled in step 3 shall be supported according to the formwork of the beam It is installed on the longitudinal side of the inner side of the arc beam 1 by means of a method, and after the installation is completed, the formwork structure on the side of the beam is fixed.

Step 7, binding the steel bars of the circular arc beam 1; after the steel bars are bound, use a hair dryer or a sawdust cleaner to clean up the garbage in the formwork structure on the side of the beam.

Step 8, combine the beam side formwork structure on the outer longitudinal side of the circular arc beam 1; After the beam side formwork structure is installed, check the position of the beam side formwork structure with the hanging wire; then install the beam side main back corrugations 8 on both sides of the arc beam 1, and connect the first pair of pull bolts 3, and adjust it if there is an error. The first pair of pull bolts 3 is adjusted.

Step nine, concrete pouring.

In this embodiment, the method for making the beam side formwork structure in step 1 is as follows: according to the height of the arc beam 1, the beam side secondary corrugation 7 is made, and the length of the beam side secondary corrugation 7 exceeds the height of the arc beam 1 by 100 mm to 150 mm; Open the through hole 16 on the two sides of the beam side back corrugated 7, the distance from the two ends is not less than 200mm; make the beam side formwork panel 6 according to the height and length of the circular arc beam 1;

In this embodiment, the method for making the beam bottom formwork structure in step 1 is specifically: establish the BIM model of the arc beam 1 through the revit software, and set the parameters of the arc beam 1: including the cross-sectional size and length of the arc beam 1 , radian, the thickness of the floor, the cross-sectional size of the vertical load-bearing structure connected to the arc beam 1, and the spatial positioning of the arc beam 1 are input into the BIM model, and finally connected to the 3D printer through the revit output port , use the 3D printer to completely print the beam bottom template panel 4 according to the model parameters.

In this embodiment, the method for measuring and setting out the arc beam 1 in step 2 is specifically: since the radian, length and positioning (arc c ₁ c _n ) of the arc beam 1 are known in the design drawings, That is to say, the arc c ₁ c _n of the arc beam 1 in the design drawing is known, firstly, the parallel lines a ₁ a _n and b ₁ b _n of the chord c ₁ c _n are made in the electronic design drawing, in order to ensure the accuracy; a ₁ a _n is divided into several segments, namely a ₁ a ₂ , a ₂ a ₃ ... a _n-1 a _n , and b ₁ b _n is divided into several segments, respectively b ₁ b ₂ , b ₂ b ₃ ... b _n-1 b _n , connect a ₁ b ₁ , a ₂ b ₂ , a ₃ b ₃ ......a _n b _n to make height h ₁ , h ₂ , h ₃ ......h _n , loss of height h ₁ , h ₂ , h ₃ ... h _n intersects arc c ₁ c _n at c ₁ , c ₂ , c ₃ ... c _n respectively; then c ₁ , c ₂ , _{c 3} ...... _{c n} coordinates are positioned at the construction site, connected in sequence to form arc curves, and the line _{is completed} . The more points, the more c ₁ -c _n points obtained, and the higher the accuracy of on-site positioning.

In this embodiment, the method of measuring and setting out the circular arc beam 1 in step 2 can also use the method of optimizing the calculation of the lost height h _n and the determination of the positions of a ₁ a ₁₁ and b ₁ b ₁₁ : first, use the method of computer drawing The method directly measures the dimensions of the loss heights h ₁ , h ₂ , h ₃ ..... _hn , and then locates the points a ₁ , a ₂ , The positional relationship between a3...a _n and the grid axis, and at the same time find out the positional relationship between b ₁ , b ₂ , b ₃ ...b _n and the grid axis, and then at the construction site Release the two line segments a ₁ a _n and b ₁ b _n (the axis network has been set out according to the reference point given by the surveying and mapping institute), and then position the arc beam 1 according to the lines a ₁ a _n , b ₁ b _n and h _n The arc c ₁ c _n line.

In this embodiment, the specific method for on-site setting-out in step 2 is: set-out the line according to the arc c ₁ c _n line of the arc beam 1 in the spare space, place the beam side formwork structure at the ink line, and pass through according to the arc The nuts on the first pair of pull bolts 3 adjust the arc-shaped beam side template structure to the ink line position to ensure that the arc of the template structure is compatible with the arc of the arc beam 1.

Above-mentioned embodiment is not exhaustive of specific implementation, also can have other embodiment, and above-mentioned embodiment purpose is to illustrate the present invention, rather than limit the scope of protection of the present invention, all applications that come from the simple change of the present invention all fall within the scope of this invention. within the scope of protection of the invention.

Claims (10)

1. A formwork system of an arc beam, set up on the scaffold (2) below the arc beam (1); the formwork system includes a beam bottom formwork structure, a beam side formwork structure and the first pair of pull bolts (3) It is characterized in that: the beam bottom formwork structure includes a beam bottom formwork panel (4) and a beam bottom secondary back corrugation (5); the beam bottom secondary back corrugations (5) have a group, and are arranged in parallel intervals along the transverse direction On the scaffold (2); wherein the major axis of each beam bottom back flute (5) is an arc line, and the radian of the arc line is adapted to the arc of the arc beam (1) major axis; the beam bottom The formwork panel (4) is erected horizontally on the beam bottom secondary corrugation (5) and arranged along the entire length of the bottom surface of the circular arc beam (1) to be poured; the long axis of the beam bottom formwork panel (4) is an arc line, and The arc of the arc is adapted to the arc of the long axis of the arc beam (1); there are two formwork structures on the side of the beam, which are arranged along the longitudinal sides of the arc beam (1) both sides to be poured; wherein , each beam side formwork structure includes a beam side formwork panel (6), a beam side secondary back corrugation (7) and a beam side main back corrugation (8); the horizontal section of the beam side formwork panel (6) is circular Arc-shaped, the arc of the arc is adapted to the arc of the longitudinal side of the arc beam (1) to be poured; the beam side secondary back corrugation (7) has a set of horizontal sections along the beam side formwork panel (6) The circular arc extension direction is arranged at intervals, and each beam side secondary back flute (7) is fixedly connected with the beam side formwork panel (6); between every two adjacent beam side secondary back flutes (7) The second pair of tension bolts (9) are connected at vertical intervals; the beam side main back flute (8) has a group, which is connected to the outside of the beam side secondary back flute (7) at vertical parallel intervals, and each beam The side main back flutes (8) are all arc-shaped; the first pair of pull bolts (3) are connected between the two sides of the arc beam (1) and the corresponding beam side main back flutes (8). 2. The formwork system of the circular arc beam according to claim 1, characterized in that: the cross section of the circular arc beam (1) is T-shaped, and a wing is set up under the flanges on both sides of the circular arc beam (1). Edge bottom formwork structure; the flange bottom formwork structure includes a flange bottom formwork panel (10), a flange secondary back flute (11) and a flange main back flute (12); the flange bottom formwork panel (10 ) the side edge close to the web side of the arc beam (1) is an arc line, and this side is close to the web plate of the arc beam (1); Arranged at intervals, and each flange secondary back flute (11) is connected to the flange bottom formwork panel (10) by a first fastener (13); the flange main back flute (12) has a group, along Longitudinal intervals are arranged at the bottom of the flange secondary back flute (11), and each flange main back flute (12) is correspondingly erected on the scaffold (2); The flange on one side of the circular arc beam (1) is connected to the floor, and a flange side formwork panel (14) is set up on the outer surface of the flange on the other side of the circular arc beam (1); The bottom of the panel (14) is flush with the bottom of the flange secondary back flute (11) on the corresponding side, and is fixedly connected to the flange secondary back flute (11) through the second fastener (15). 3. the formwork system of circular arc beam according to claim 2, is characterized in that: the top of described beam side formwork structure is supported on the bottom of flange bottom formwork panel (10); The bottom of described beam side formwork structure exceeds The bottom surface of the circular arc beam (1) to be poured is supported on the horizontal bar (2.1) of the scaffold (2) at the bottom thereof, wherein the length of the excess part is 100 mm to 150 mm; The beam bottom formwork structure is laid on the horizontal bar (2.1) of the scaffold (2) at the bottom thereof, and is located between the beam side formwork structures on both sides. 4. the formwork system of circular arc beam according to claim 3, is characterized in that: the spacing between adjacent two beam side times back corrugated (7) is not more than 250mm; Wherein, every beam side times back corrugated (7) ) is bonded to the beam side formwork panel (6) by adhesive glue; on the side of the beam side secondary back corrugated (7), there are through holes (16) which pass through the second pair of pull bolts (9) at vertical intervals. ); the distance between two vertically adjacent second tension bolts (9) is not greater than 500mm; The main back flute (8) on the beam side is a double steel pipe back flute; the two ends of the first pair of pull bolts (3) are correspondingly installed in the gap between the two steel pipes of the main back flute (8) on the beam side , and fixed. 5. the formwork system of circular arc beam according to claim 3, is characterized in that: the formwork panel (4) at the bottom of the beam is a 3D printing formwork, and the formwork panel (4) at the bottom of the beam and the back corrugated (5) at the bottom of the beam ) are correspondingly connected by a third fastener (17). 6. The formwork system of the circular arc beam according to claim 3, characterized in that: the top of the vertical bar (2.2) of the scaffold (2) below the circular arc beam (1) is correspondingly provided with a horizontal support (18); Wherein, each horizontal support (18) is arc-shaped and arranged along the long axis direction of the arc beam (1); the horizontal support (18) is supported on the beam side template structure and the beam bottom template structure Below the horizontal bar (2.1) at the bottom; The bottom of the pole (2.2) of the scaffold (2) is provided with a spacer (19) corresponding to the pad. 7. A construction method of the formwork system described in any one of claims 1-6, characterized in that, comprising steps as follows: Step 1, make the beam bottom formwork panel (4) and the beam bottom secondary corrugation (5) of the beam bottom formwork structure, and simultaneously make the beam side formwork panel (6), beam side secondary back corrugation (7) and beam side formwork structure Beam side main back flute (8); Step 2, measuring and setting out: the construction setting out of the circular arc beam (1) adopts the chord distance method to carry out on-site setting out; Step 3, pre-assemble the beam side formwork structure: glue the beam side secondary back flute (7) on the outside of the beam side formwork panel (6), and the distance between two adjacent beam side secondary back flutes (7) No more than 250mm; insert the second pair of tension bolts (9) into the corresponding through holes (16) on the side back corrugation (7) of the adjacent beam, and tighten and fix them; Step 4, set up the scaffolding at the bottom of the beam (2): set up the scaffolding (2) under the arc beam (1) to be poured, and set the horizontal support (18) on the top of the vertical pole (2.2) under the arc beam (1) correspondingly ); Step 5, laying the beam bottom formwork structure: Lay the beam bottom secondary corrugation (5) on the horizontal bar (2.1) on the top of the horizontal support (18), and the beam bottom secondary corrugations (5) on both sides are fixed with connectors to realize The radian of the beam bottom secondary corrugation (5); then the beam bottom formwork panel (4) is placed at the design position according to the drawing, the beam bottom formwork panel (4) is adjusted and the third fastener (17) is used to connect with the beam bottom The bottom back flute (5) is connected as a whole; Step 6, install the beam side formwork structure at the inner longitudinal side of the circular arc beam (1); install the beam side formwork structure pre-assembled in step 3 on the longitudinal side of the inner side of the circular arc beam (1) according to the way the beam is supported. On the side, after the installation is completed, fix the beam side formwork structure; Step 7, binding the steel bars of the arc beam (1); Step 8: Combine the beam side formwork structure at the outer longitudinal side of the arc beam (1): After the steel bars are bound, install the beam side formwork structure pre-assembled in step 3 on the longitudinal side of the arc beam (1) At the side position, after the beam side formwork structure is installed, review the positions of the two beam side formwork structures; Pull bolts (3); Step nine, concrete pouring. 8. The construction method of the formwork system according to claim 7, characterized in that: the method for making the beam side formwork structure in step 1 is specifically: making the beam side secondary back flute (7) according to the height of the arc beam (1) , the length of the secondary corrugation (7) on the beam side exceeds the height of the arc beam (1) by 100mm to 150mm; on the two sides of the secondary corrugation (7) on the beam side, open a through hole at a position not less than 200mm from both ends ( 16); Make the beam side template panel (6) according to the height and the length of the arc beam (1); The method of making the formwork structure of the beam bottom in step 1 is as follows: establish the BIM model of the arc beam (1) through the revit software, input the parameters of the arc beam (1) into the BIM model, and finally communicate with the 3D printer through the revit output port To connect, use the 3D printer to completely print the beam bottom template panel (4) according to the model parameters. 9. The construction method of the template system according to claim 7, characterized in that: The method of measuring and setting out the arc beam (1) in step two is specifically: the arc c ₁ c _n of the arc beam (1) in the design drawing is known, and the parallel line a ₁ a _n of the chord c ₁ c _n is known and b ₁ b _n , divide a ₁ a _n into several segments, respectively a ₁ a ₂ , a ₂ a ₃ ... a _n-1 a _n , divide b ₁ b _n into several segments, respectively, b ₁ b ₂ , b ₂ b ₃ ...... b _n-1 b _n , connect a ₁ b ₁ , a ₂ b ₂ , a ₃ b ₃ ...... a _n b _n to make height h ₁ , h ₂ , h ₃ ......h _n , lost height h ₁ , h ₂ , h ₃ ......h _n intersects arc c ₁ c _n at c ₁ , c ₂ , c ₃ ..... .c _n ; Then _locate the coordinates of c ₁ , c ₂ , c ₃ . 10. The construction method of the formwork system according to claim 7, characterized in that: the method of measuring and setting out the circular arc beam (1) in step 2 adopts the calculation of optimized loss height h _n and a ₁ a ₁₁ , b ₁ The method of determining the position of b ₁₁ : first use the method of computer drawing to directly measure the size of the loss height h ₁ , h ₂ , h ₃ ..... _hn , and then locate it according to the grid in the design drawing, and find Find out the positional relationship between points a ₁ , a ₂ , a ₃ ...... a _n and the central axis of the grid, and at the same time find out the relationship between b ₁ , b ₂ , b ₃ ...... b _n and the grid The position relationship between the central axes, and then release two line segments a ₁ a _n and b ₁ b _n on the construction site, and then locate the circle of the arc beam (1) according to the lines a ₁ a _n , b ₁ b _n and h _n arc c ₁ c _n line.