CN114150864B

CN114150864B - Large-span prestressed concrete roof beam formwork structure

Info

Publication number: CN114150864B
Application number: CN202111464778.4A
Authority: CN
Inventors: 郭立; 郑箜琳; 史培军; 黄锡威; 龚计宽; 王宇豪; 刘明雷
Original assignee: Zhejiang Yinchen Construction Co ltd
Current assignee: Zhejiang Yinchen Construction Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2023-01-31
Anticipated expiration: 2041-12-02
Also published as: CN114150864A

Abstract

The utility model relates to a large-span prestressed concrete roof beam formwork structure relates to the field of construction technology, and it includes the roof beam template and is located the bearing structure of roof beam template bottom, bearing structure is used for supporting the roof beam template, still including the fixed component who is located roof beam template both ends, fixed component includes base plate, locating piece and tensioning member, the base plate with roof beam template tip fixed connection, the locating piece is equipped with a plurality ofly, the locating piece with base plate sliding connection, the locating piece is used for spacing to the roof beam reinforcing bar, tensioning member is used for right the locating piece is fixed. When the formwork structure is installed, the beam reinforcing steel bars can be driven to move through the sliding positioning blocks, so that the distance between the beam reinforcing steel bars and the arrangement mode can be adjusted, the concrete beam formwork structure is adaptive to concrete beams in different forms, and the universality of the concrete beam formwork structure is effectively improved.

Description

Large-span prestressed concrete roof beam formwork structure

Technical Field

The application relates to the field of building construction technology, in particular to a large-span prestressed concrete beam formwork structure.

Background

Along with the great improvement of the engineering technology level and the increasing of the personalized demand in recent years, the demand of the domestic building market for open space is increased; the prestressed concrete beam has the characteristics of small self weight, high rigidity, cracking resistance, strong deformation resistance and the like, and has good adaptability to large-span and large-load structures, so that the large-span prestressed concrete beam is widely applied to engineering construction, and the key in the construction technology is realized by mounting a stable formwork support system aiming at the large-span prestressed concrete beam.

At present, a formwork system in the related art generally includes a beam formwork, beam reinforcing steel bar fixing members located at two ends of the beam formwork, and a supporting structure located at the bottom of the beam formwork, wherein the fixing members are used for fixing beam reinforcing steel bars, the beam reinforcing steel bars are arranged in the beam formwork before construction, then the two ends of the beam reinforcing steel bars are fixed by the fixing members, then concrete is poured in the beam formwork, and the beam reinforcing steel bars are washed away by the concrete or displaced when the concrete is poured by the fixing members.

In view of the above-mentioned related technologies, the inventor thinks that with the improvement of the engineering technology level, the form of the concrete beam is more and more diversified, so that beam reinforcements with different pitches and numbers need to be laid in a beam template in advance according to the form of the concrete beam before construction, and a fixing member in the related technology can only fix the beam reinforcements laid with fixed numbers and fixed pitches, and when the beam reinforcements laid with other forms need to be fixed, a new fixing member needs to be prefabricated in advance, so that the inventor thinks that the concrete beam formwork structure in the related technology has the defect of a small application range.

Disclosure of Invention

In order to improve concrete beam formwork structure's commonality, this application provides a large-span prestressed concrete beam formwork structure.

The application provides a large-span prestressed concrete roof beam formwork structure adopts following technical scheme:

the utility model provides a large-span prestressed concrete roof beam formwork structure, includes the roof beam template and is located the bearing structure of roof beam template bottom, bearing structure is used for supporting the roof beam template, still including the fixed component that is located roof beam template both ends, fixed component includes base plate, locating piece and tensioning member, the base plate with roof beam template tip fixed connection, the locating piece is equipped with a plurality ofly, the locating piece with base plate sliding connection, the locating piece is used for carrying on spacingly to the roof beam reinforcing bar, tensioning member is used for right the locating piece is fixed.

Through adopting above-mentioned technical scheme, during installation formwork structure, with beam template and bearing structure fixed connection, then adopt bolt fixed connection with base plate and beam template tip, insert the roof beam reinforcing bar both ends respectively in the locating piece after that, then along base plate sliding location piece, the locating piece drives the roof beam reinforcing bar and slides when sliding, thereby interval and the mode of arranging between the roof beam reinforcing bar can be adjusted, thereby adapt to different forms's concrete beam, and a plurality of locating pieces can be used for the fixed different quantities's of roof beam reinforcing bar, thereby make fixed component can fix the roof beam reinforcing bar of different quantity and mode of arranging, need not to prefabricate different base plates to the concrete beam of particular form, consequently, the commonality of concrete beam formwork structure has effectively been improved.

Optionally, a transverse sliding groove and a plurality of longitudinal sliding grooves are formed in the base plate, one positioning block is connected in one sliding groove in a one-to-one correspondence mode, and a through hole used for fixing the beam steel bar is formed in the positioning block.

Through adopting above-mentioned technical scheme, when laying the roof beam reinforcing bar, insert the through-hole of locating piece respectively earlier in roof beam reinforcing bar both ends, then follow the base plate slip locating piece to interval and the mode of arranging between the adjustment roof beam reinforcing bar. Set up horizontal spout and vertical spout and not only can adjust the transverse separation between the roof beam reinforcing bar, can also adjust the longitudinal separation between the roof beam reinforcing bar for a plurality of roof beam reinforcing bar longitudinal section can arrange for forms such as square, circular or annular, thereby has further increased the application scope of fixed component, has consequently effectively improved the commonality of concrete beam formwork structure.

Optionally, the fixed component further comprises a blocking block, the sliding groove penetrates through the thickness direction of the substrate, a stop block is fixedly connected to the inner wall of the sliding groove, the stop block is used for preventing the positioning block from sliding along the thickness direction of the substrate, and the blocking block is used for blocking the sliding groove.

Through adopting above-mentioned technical scheme, it prevents that the locating piece from sliding along basic thickness direction to set up the dog, thereby strengthen the stability of locating piece, after the locating piece is fixed the roof beam reinforcing bar, carry out the shutoff with the shutoff piece to the position that the locating piece is not connected to the spout, because the spout inner wall is equipped with the dog, consequently the shutoff piece can not drop from the spout, and easily installation, the shutoff piece receives the pressure of concrete and only can be more and more tight in pouring process, thereby the problem of concrete follow spout internal leakage has been avoided, the leakproofness of base plate has effectively been strengthened.

Optionally, the tensioning member is located the base plate is kept away from one side of beam template, the tensioning member includes sleeve pipe and driving tube, sleeve pipe and locating piece connection, the sleeve pipe with the axis coincidence of through-hole, the driving tube with the coaxial threaded connection of sleeve pipe, the driving tube be used for with the beam reinforcing bar is taut.

Through adopting above-mentioned technical scheme, after the locating piece is fixed with the roof beam reinforcing bar, with sleeve pipe and locating piece fixed connection, then keep away from sheathed tube one end welding one end fender dish at the roof beam reinforcing bar, then rotate the driving tube, the driving tube during rotation with keep off the dish butt to the drive reinforcing bar is straightened, and tightens the roof beam reinforcing bar, the roof beam reinforcing bar takes place buckling deformation by the concrete impact when preventing to pour, thereby guarantees that the concrete beam who pours can satisfy the construction requirement.

Optionally, a plurality of positioning columns are fixedly connected to the end wall of one end of the sleeve close to the substrate, and a plurality of positioning holes for the positioning columns to be inserted are formed in one side of the positioning block close to the tensioning piece.

Through adopting above-mentioned technical scheme, after the locating piece is fixed with the roof beam reinforcing bar, peg graft in the locating hole of locating piece through the reference column with sleeve pipe one end, then rotate the driving tube and can be taut with the roof beam reinforcing bar, when the roof beam reinforcing bar is taut, the sleeve pipe can support locating piece and base plate tightly, thereby realize the fixed to the locating piece, foretell structure not only can be convenient for install the sleeve pipe fast, and the driving tube can be fixed the locating piece when with the roof beam reinforcing bar is taut, and easy operation is convenient, can effectively improve the work efficiency when a formwork.

Optionally, the positioning block includes two splicing blocks and a fastener, an area of a side of the two splicing blocks away from each other is larger than an area of a side of the two splicing blocks close to each other, and the fastener is used for fixing the two splicing blocks.

Through adopting above-mentioned technical scheme, set up the locating piece into two detachable concatenation pieces, can be convenient for piece together the piece into complete locating piece and sliding connection in the spout to can be convenient for dismantle the piece from the spout after the formwork is accomplished, thereby clear up remaining mud in the spout, avoid long-term accumulation's concrete to block up the spout, thereby lead to the problem that the locating piece can not slide, consequently effectively improved fixed component's life.

Optionally, a plurality of limiting pieces which are uniformly distributed are arranged on the inner wall of the through hole along the circumferential direction, and the limiting pieces are used for fixing the beam steel bars.

Through adopting above-mentioned technical scheme, fix the roof beam reinforcing bar through the locating part, can reduce the problem that the roof beam reinforcing bar rocked in the through-hole to improve the stability of roof beam reinforcing bar in the template, reduce the problem that the roof beam reinforcing bar takes place the displacement when the cast concrete, be favorable to improving construction quality.

Optionally, the limiting part includes a spring and a limiting block, an accommodating hole is formed in the inner wall of the through hole, the limiting block is connected to the accommodating hole in a sliding manner, the spring is located in the accommodating hole, and the spring enables the limiting block to have a tendency of being disengaged from the accommodating hole.

Through adopting above-mentioned technical scheme, the spring makes the stopper support the roof beam reinforcing bar tightly, and a plurality of locating parts press from both sides the roof beam reinforcing bar tightly to the roof beam reinforcing bar that makes different diameters can both be located the center department of through-hole, is favorable to the interval between the accurate control roof beam reinforcing bar, thereby improves the accuracy nature of laying the roof beam reinforcing bar, is favorable to improving construction quality.

Optionally, the limiting block is provided with a guide surface which is obliquely arranged, and the guide surface is used for guiding the beam steel bar to be inserted into the through hole.

Through adopting above-mentioned technical scheme, set up the guide face on the stopper and can be convenient for the reinforcing bar insert in the through-hole, reduced the operation degree of difficulty, be favorable to improving the efficiency of construction.

Optionally, the base plate is provided with a plurality of, the base plate all is equipped with draw-in groove and fixture block on two just right lateral walls along thickness direction, adjacent two the base plate passes through the fixture block with the connection can be dismantled to the draw-in groove.

Through adopting above-mentioned technical scheme, set up a plurality of base plates, can select the base plate of suitable quantity according to the size of concrete beam in the work progress, then pass through fixture block and draw-in groove concatenation with a plurality of base plates, after that with base plate and roof beam template fixed can, foretell structure is convenient for install the concatenation to the base plate, can also improve the efficiency of construction when improving fixed component suitability.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the slidable positioning blocks are arranged on the base plate, when beam reinforcing steel bars are arranged, two ends of the beam reinforcing steel bars are respectively inserted into the positioning blocks, then the positioning blocks slide along the base plate, the beam reinforcing steel bars are driven to slide when the positioning blocks slide, so that the space between the beam reinforcing steel bars and the arrangement mode can be adjusted, the concrete beam formwork structure is suitable for concrete beams in different forms, and the positioning blocks can be used for fixing beam reinforcing steel bars in different quantities, so that the fixing component can fix the beam reinforcing steel bars in different quantities and the arrangement mode, different base plates do not need to be prefabricated for the concrete beams in specific forms, and the universality of the concrete beam formwork structure is effectively improved;

2. by arranging the tensioning piece, the tensioning piece can drive the reinforcing steel bars to be straightened and tighten the beam reinforcing steel bars, so that the beam reinforcing steel bars are prevented from being bent and deformed due to the impact of concrete during pouring, and the poured concrete beam can meet the construction requirement;

3. the positioning column is fixedly connected to the sleeve, the positioning block is provided with the positioning hole, after the positioning block fixes the beam steel bar, one end of the sleeve is inserted into the positioning hole of the positioning block through the positioning column, then the driving pipe is rotated to tension the beam steel bar, the sleeve can tightly support the positioning block to the base when the beam steel bar is tensioned, and therefore the positioning block is fixed, the sleeve can be conveniently and quickly installed by the aid of the structure, the positioning block can be fixed by the driving pipe when the beam steel bar is tensioned, the operation is simple and convenient, and the working efficiency of formwork supporting can be effectively improved;

4. the utility model provides a locating piece includes two concatenation pieces and fastener, set up the locating piece into two detachable concatenation pieces, can be convenient for piece together the piece into complete locating piece and sliding connection in the spout, and can be convenient for dismantle the concatenation piece from the spout after the formwork is accomplished, thereby clear up remaining mud in the spout, the concrete of avoiding long-term accumulation blocks up the spout, thereby lead to the problem that the locating piece can not slide, consequently, the life of fixed component has effectively been improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is an exploded view of the securing member of an embodiment of the present application;

FIG. 3 is a cross-sectional view of a substrate according to an embodiment of the present application;

FIG. 4 is an exploded view of a locating block and tension member of an embodiment of the present application;

fig. 5 is an exploded view of a positioning block according to an embodiment of the present disclosure.

Reference numerals: 1. a beam template; 2. a support structure; 3. a fixing member; 31. a substrate; 311. a clamping block; 312. a card slot; 313. a chute; 314. a stopper; 315. a plugging block; 32. positioning blocks; 321. a through hole; 3211. an accommodation hole; 322. splicing blocks; 3221. positioning holes; 323. a fastener; 324. a limiting member; 3241. a spring; 3242. a limiting block; 32421. a guide surface; 33. a tension member; 331. a sleeve; 3311. a positioning column; 332. a drive tube; 4. beam reinforcing steel bars; 41. a baffle disc.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses large-span prestressed concrete roof beam formwork structure. Referring to fig. 1, a formwork structure for a long-span prestressed concrete beam includes a beam form 1, a support structure 2 located at the bottom of the beam form 1, and fixing members 3 located at both ends of the beam form 1.

Referring to fig. 1, a beam formwork 1 is formed by fixedly splicing three steel formworks by bolts, the cross section of the beam formwork 1 perpendicular to the length direction is U-shaped, and a supporting structure 2 is a supporting scaffold formed by overlapping steel pipes.

Referring to fig. 1 and 2, the fixing member 3 includes a plurality of base plates 31, positioning blocks 32 and tensioning members 33, the base plates 31 are provided with a plurality of clamping blocks 311 and clamping grooves 312, two opposite side walls of the base plates 31 in the thickness direction are respectively provided with a clamping block 311 and a clamping groove 312, a proper number of base plates 31 can be selected in the construction process, then the plurality of base plates 31 are spliced through the clamping blocks 311 and the clamping grooves 312, and then the base plates 31 and the beam formwork 1 are fixedly connected by bolts.

Referring to fig. 1, 2 and 3, the base plate 31 is provided with a horizontal sliding slot 313 and a plurality of longitudinal sliding slots 313, in this embodiment, five longitudinal sliding slots 313 are provided, and in other embodiments, the number of the longitudinal sliding slots 313 may be determined according to the size of the base plate 31 and the actual construction requirement, and is not limited in this application. The five longitudinal sliding chutes 313 are uniformly distributed at intervals along the length direction of the transverse sliding chute 313, the transverse sliding chute 313 is positioned at the midpoint of the longitudinal sliding chute 313 along the length direction, and the sliding chute 313 penetrates along the thickness direction of the substrate 31.

Referring to fig. 1, 2 and 3, a stopper 314 is integrally disposed on an inner wall of the sliding groove 313, and the stopper 314 is used to prevent the positioning block 32 from sliding along the thickness direction of the substrate 31.

Referring to fig. 2, 3 and 4, the positioning blocks 32 are provided with a plurality of positioning blocks 32, one positioning block 32 is slidably connected in one sliding groove 313 in a one-to-one correspondence manner, the positioning block 32 penetrates through a through hole 321 for fixing the beam rebar 4 along the thickness direction of the substrate 31, the positioning block 32 comprises two splicing blocks 322 and a fastener 323, the area of one side of each splicing block 322, which is far away from each other, is gradually increased, the two splicing blocks 322 are abutted to the side with the same area, the fastener 323 is used for fixing the two splicing blocks 322, and the fastener 323 is a bolt.

Referring to fig. 1 and 2, a blocking block 315 is arranged on one side of the base plate 31 close to the beam formwork 1, the blocking block 315 is a rubber sealing gasket, the blocking block 315 is clamped in the sliding groove 313, and the blocking block 315 blocks a part of the sliding groove 313 which is not connected with the positioning block 32, so that leakage of concrete from the sliding groove 313 during pouring is avoided.

Referring to fig. 1, fig. 4 and fig. 5, a plurality of stoppers 324 are uniformly distributed on an inner wall of the through hole 321 along a circumferential direction, in this embodiment, the number of the stoppers 324 is three, each stopper 324 includes a spring 3241 and a stopper 3242, an accommodating hole 3211 is formed in the inner wall of the through hole 321, the stopper 3242 is slidably connected in the accommodating hole 3211, the spring 3241 is located in the accommodating hole 3211, one end of the spring 3241 is welded to a bottom wall of the accommodating hole 3211, and the other end of the spring 3241 and one end of the stopper 3242 are welded to one end of the accommodating hole 3211. In a normal state, the spring 3241 causes one ends of the stopper pieces 3242 distant from the spring 3241 to abut against each other. The side of the stop block 3242 close to the beam form 1 is provided with a guide surface 32421, and the guide surface 32421 is inclined toward the direction close to the axis of the through hole 321 along the end far from the beam form 1.

Referring to fig. 1, 4 and 5, the tensioning member 33 is located on one side of the substrate 31 far away from the beam template 1, the tensioning member 33 includes a sleeve 331 and a driving tube 332, a plurality of positioning posts 3311 are integrally arranged on an end wall of the sleeve 331 near one end of the substrate 31, two positioning posts 3311 are arranged in the embodiment, the two positioning posts 3311 are uniformly distributed along the circumferential direction of the sleeve 331 at intervals, and a positioning hole 3221 for the positioning posts 3311 to be inserted is arranged at one end of the splicing block 322 with a large side area. When the sleeve 331 is inserted into the positioning hole 3221 through the positioning post 3311, the axes of the sleeve 331 and the through hole 321 coincide. The drive tube 332 is coaxially threaded with the sleeve 331.

The embodiment of the application provides a large-span prestressed concrete roof beam formwork structure's implementation principle does: before installing the formwork structure, the corresponding number of positioning blocks 32 and tensioning pieces 33 are selected according to the number of the beam reinforcements 4 to be arranged, and then the positioning blocks 32 are spliced and placed in the sliding grooves 313.

When the formwork supporting structure is installed, the beam formwork 1 is fixed on the supporting structure 2, a proper number of base plates 31 are selected, then the base plates 31 are spliced through the clamping blocks 311 and the clamping grooves 312, and then the base plates 31 are fixedly connected with the beam formwork 1 through bolts. Then, the two ends of the beam steel bars 4 are respectively inserted into the through holes 321 of the positioning blocks 32 at the two ends, then the positioning blocks 32 are slid along the base plate 31, and the beam steel bars 4 are driven to slide when the positioning blocks 32 slide, so that the space and the arrangement mode between the beam steel bars 4 can be adjusted. After the adjustment, insert sleeve 331 one end in locating hole 3221 of locating piece 32 through reference column 3311, then keep away from one end welding fender dish 41 of beam template 1 at beam reinforcing bar 4, the diameter of fender dish 41 should be greater than the diameter of beam reinforcing bar 4, rotate driving tube 332 after that, driving tube 332 rotates the time with keep off dish 41 butt to the drive reinforcing bar is straightened, and tighten beam reinforcing bar 4, prevent that beam reinforcing bar 4 from being strikeed by the concrete and taking place buckling deformation when pouring. When the beam reinforcing bar 4 is tensioned, the sleeve 331 can press the positioning block 32 against the base plate 31, so as to fix the positioning block 32. And after the beam reinforcing steel bars 4 are tensioned, the installation of the formwork supporting structure is completed.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a large-span prestressed concrete roof beam formwork structure, includes beam forms (1) and is located bearing structure (2) of beam forms (1) bottom, bearing structure (2) are used for supporting beam forms (1), its characterized in that: the beam formwork is characterized by further comprising fixing components (3) located at two ends of the beam formwork (1), wherein each fixing component (3) comprises a base plate (31), a plurality of positioning blocks (32) and tensioning pieces (33), the base plates (31) are fixedly connected with the end portions of the beam formwork (1), the plurality of positioning blocks (32) are arranged, the positioning blocks (32) are connected with the base plates (31) in a sliding mode, the positioning blocks (32) are used for limiting beam reinforcements (4), and the tensioning pieces (33) are used for fixing the positioning blocks (32);

a transverse sliding groove (313) and a plurality of longitudinal sliding grooves (313) are formed in the base plate (31), one positioning block (32) is connected in one sliding groove (313) in a one-to-one corresponding sliding mode, and through holes (321) used for fixing beam reinforcing steel bars (4) are formed in the positioning blocks (32);

the fixing component (3) further comprises a blocking block (315), the sliding groove (313) penetrates through the thickness direction of the base plate (31), a stop block (314) is fixedly connected to the inner wall of the sliding groove (313), the stop block (314) is used for preventing the positioning block (32) from sliding along the thickness direction of the base plate (31), and the blocking block (315) is used for blocking the sliding groove (313);

the tensioning piece (33) is located on one side, away from the beam formwork (1), of the base plate (31), the tensioning piece (33) comprises a sleeve (331) and a driving pipe (332), the sleeve (331) is connected with the positioning block (32), the sleeve (331) is overlapped with the axis of the through hole (321), the driving pipe (332) is coaxially in threaded connection with the sleeve (331), and the driving pipe (332) is used for tensioning the beam reinforcing steel bar (4);

a plurality of positioning columns (3311) are fixedly connected to the end wall of one end, close to the substrate (31), of the sleeve (331), and a plurality of positioning holes (3221) for the positioning columns (3311) to be inserted are formed in one side, close to the tensioning piece (33), of the positioning block (32).

2. The formwork structure for a long-span prestressed concrete beam according to claim 1, wherein: the positioning block (32) comprises two splicing blocks (322) and a fastener (323), the area of one side, far away from each other, of the two splicing blocks (322) is larger than the area of one side, close to each other, of the two splicing blocks, and the fastener (323) is used for fixing the two splicing blocks (322).

3. The formwork structure for a long-span prestressed concrete beam according to claim 1, wherein: the inner wall of the through hole (321) is provided with a plurality of evenly distributed limiting pieces (324) along the circumferential direction, and the limiting pieces (324) are used for fixing the beam steel bars (4).

4. The formwork structure for a long-span prestressed concrete beam according to claim 3, wherein: the limiting member (324) comprises a spring (3241) and a limiting block (3242), an accommodating hole (3211) is formed in the inner wall of the through hole (321), the limiting block (3242) is slidably connected in the accommodating hole (3211), the spring (3241) is located in the accommodating hole (3211), and the spring (3241) enables the limiting block (3242) to have a tendency of disengaging from the accommodating hole (3211).

5. The formwork structure for a long-span prestressed concrete beam according to claim 4, wherein: and the limiting block (3242) is provided with a guide surface (32421) which is obliquely arranged, and the guide surface (32421) is used for guiding the beam steel bar (4) to be inserted into the through hole (321).

6. The formwork structure for a long-span prestressed concrete beam according to claim 4, wherein: the base plate (31) is provided with a plurality of, base plate (31) all are equipped with draw-in groove (312) and fixture block (311) on two just right lateral walls along thickness direction, adjacent two base plate (31) pass through fixture block (311) with draw-in groove (312) detachable connection.