CN212927032U - Primary and secondary beam one-step forming structure of PC superposed beam - Google Patents
Primary and secondary beam one-step forming structure of PC superposed beam Download PDFInfo
- Publication number
- CN212927032U CN212927032U CN202021657415.3U CN202021657415U CN212927032U CN 212927032 U CN212927032 U CN 212927032U CN 202021657415 U CN202021657415 U CN 202021657415U CN 212927032 U CN212927032 U CN 212927032U
- Authority
- CN
- China
- Prior art keywords
- notch
- steel plate
- cross
- die
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a primary and secondary beam one-step forming structure of a PC superposed beam, which comprises a precast concrete superposed beam main beam, a special end die for a notch and a special die for a cross notch, wherein the precast concrete superposed beam main beam is provided with the cross notch at the crossed and overlapped part of the secondary beam, horizontal reinforcing steel bars are arranged in the cross notch, a protective layer is arranged below the cross notch, the special end die for the notch and the special die for the cross notch are arranged in the cross notch, the superposed beam main beam is provided with one-step pouring of unbroken stressed reinforcing steel bars and concrete, the structural performance integrity of the superposed beam main beam is ensured, the construction efficiency is improved, the labor cost is reduced, the special die for the cross notch is adopted, the installation is flexible, the error is adjustable, the difficulty degree of a notch manufacturing process is reduced, and the template effect of the cross notch is realized, the construction consumption of the template is saved, and the popularization and the application of the fabricated concrete structure are facilitated.
Description
Technical Field
The invention belongs to the field of constructional engineering, and particularly relates to a primary and secondary beam one-step forming structure of a PC composite beam.
Background
The fabricated building is rapidly developed with good economic, environmental and social benefits. Compared with an assembled integral shear wall structure system, the assembled integral structure frame system has more difficulty in the design and prefabrication stages, and is particularly embodied in the intersecting and overlapping form of a main beam of a prefabricated superposed beam and a secondary beam of the superposed beam.
The middle notches often appear in the superposed main beams to facilitate the intersection and the lap joint with the secondary beams, so that the connection performance and the integrity of the integral structure are improved. However, the notch is located in the middle of the component, so that the size is small, and demoulding and surface collection are extremely inconvenient. The notch of the prefabricated superposed beam has poor appearance quality, and the primary and secondary beams on site are difficult to install.
The existing conventional method is that the positions of a main beam and a secondary beam are divided into two parts and disconnected, and the main beam and the secondary beam are installed in place and then formwork is erected to cast in-situ concrete at the lap joint section of the main beam and the secondary beam; secondly, pre-buried threaded sleeves are adopted, concrete with the thickness of 120mm is prefabricated at the bottom of the main beam of the superposed beam, bolts with anchor plates are installed and screwed after the superposed beam is installed in place, and the formwork is formed by cast-in-place concrete. In both processes, the stress rib and the horizontal longitudinal rib of the main beam of the superposed beam need to be disconnected, so that the safety performance of the structure is influenced. The technologies increase the specification of the stress bar or adopt a grouting sleeve to anchor the steel bar, so that the construction cost is increased and the construction period is prolonged in the installation process.
The main beam and the secondary beam of the assembled PC superposed beam are combined with the main beam of the prefabricated superposed beam, the structural characteristics of the main beam and the secondary beam are combined, the advantages of stressed reinforcing steel bars are not damaged, the main beam and the secondary beam are combined through a special die, the advantages of the main beam and the secondary beam can be exerted to the greatest extent, related disadvantages are avoided, the requirement of construction efficiency is improved, and the problem can be effectively solved through the mode of the cross-shaped notch of the main beam and the secondary beam of the superposed beam.
Disclosure of Invention
In order to solve the problems, the invention discloses a primary and secondary beam one-step forming structure of a PC composite beam. The problem of prefabricated wholeness ability of prefabricated superposed beams girder segmentation be difficult to guarantee is solved. After the prefabricated superposed beams are hoisted, the node concrete is cast in situ at the position intersected with the secondary beam, secondary formwork erection after the main beam of the superposed beams is prefabricated in sections is avoided, node slurry leakage is eliminated, the problem of influence on the installation efficiency is avoided, the connection strength after installation and the advantages of the prefabrication technology are brought into play, and the influence on the manufacturing cost is reduced.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a PC composite beam primary and secondary roof beam one shot forming structure, includes precast concrete composite beam girder, the special end mould of notch, "cross" notch special mould, "cross" notch is reserved at the crossing overlap joint position of secondary roof beam to precast concrete composite beam girder, "cross" notch is equipped with the horizontal reinforcement in, "cross" notch below is the protective layer, notch special end mould and "cross" notch special mould set up in "cross" notch.
Preferably, the number of the special end dies for the notches is two, the special end dies are symmetrically arranged in a cross-shaped notch, a single special end die for the notches comprises a first patterned steel plate, a first convex key slot steel block, a side steel plate and a top steel plate, the first patterned steel plate, the side steel plate and the top steel plate are assembled and welded into a rectangle, the first patterned steel plate is flush with the top of the side steel plate, the bottom of the first patterned steel plate is longer than the bottom of the side steel plate by 20mm, the patterned steel plate is provided with a long slot through which a horizontal steel bar passes, the number of the first convex key slot steel block is that the upper and the lower key slot steel blocks are respectively arranged, the two convex key slot steel blocks are vertically arranged, the size of the convex key slot steel block is 100mm, the thickness of the convex slot steel block is 30mm, the inward chamfer angle is 45 degrees, the convex key slot steel block is screwed and fixed on the inner surface of the first patterned steel, and the long slotted hole is integrally utilized to penetrate through the horizontal steel bar of the main beam from top to bottom, and is positioned and fixed on the side surface of the main beam through the positioning hole II and the screw hole I, so that the cross-shaped notch is formed.
Preferably, the special die for the cross-shaped notch comprises a second pattern steel plate, angle steel and a demoulding rod, wherein the second pattern steel plate is arranged above the bottom concrete position of the cross-shaped notch, the width dimension of the second pattern steel plate is consistent with that of the cross-shaped notch, two ends of the angle steel are fixed on two sides of the second pattern steel plate after being chamfered by 45 degrees, the side surfaces of the angle steel are flush with the second pattern steel plate, a gap of 1-2cm is reserved between the 45-degree inclined surfaces of the two ends of the angle steel and the 45-degree inclined surface of the bottom surface of the special end die for the notch, and a first positioning hole is formed in the side surface of the angle steel; the bottom of the demoulding rod is connected with the second patterned steel plate through threads and used for demoulding of the special mould.
The special end die for the notch is a mirror image, and is placed in the cross-shaped notch together with the special die for the cross-shaped notch, so that the length, the width and the height of the cross-shaped notch of the column can be limited during pouring, the main beam and the secondary beam can be poured at one time in an intersecting and overlapping mode, the integrity of the structural performance of the main beam of the superposed beam is ensured, the problem of poor concrete fitting caused by sectional prefabrication and sectional installation in the construction process and the operation interference among mutual work types are avoided, the construction efficiency is improved, in addition, the device is flexible to install and adjustable in error, the difficulty degree of a notch manufacturing process is reduced, and the production cost is further reduced.
The precast concrete superposed beam main beam is a superposed concrete member which is supported on a column or a wall at two ends in an assembled frame structure system and receives the stress of a secondary beam, is used as a template of a post-cast concrete superposed layer to bear the load in a construction stage, and forms a whole with the post-cast concrete layer. The precast concrete superposed beam main beam is provided with a cross-shaped notch of the secondary beam, the superposed main beam is adopted, the hoisting is more convenient, and meanwhile, the integrity of the structure is relatively better due to the existence of post-cast concrete.
Preferably, the special end die for the notch has enough rigidity and smoothness, and the rough surface of the special end die meets the design requirement of more than 6 mm. The convex block at the back of the base steel plate can optimize the concave-convex depth of the end part, and the material distribution size meets the drawing requirements of the prefabricated composite beam.
Preferably, the special die for the cross-shaped notch is T-shaped; the special die for the cross-shaped notch is assembled with the special end die for the notch before the side die of the composite beam is installed, and is fastened on the side die through a bolt at one position of the positioning hole, so that floating and slurry leakage of concrete at the lower opening of the special die for the cross-shaped notch are avoided, and the shape and the impression of the cross-shaped notch of the main beam of the precast concrete composite beam are further improved.
Preferably, after the 'cross-shaped' notch of the precast concrete superposed beam main beam is formed and demoulded, a 50 x 5mm angle steel is arranged and connected to one side of the notch, so that the durability is improved; according to the construction scheme on site, the precast concrete bottom plate can be installed after being hung in a building structure.
Preferably, the flatness of the bottom die of the prefabricated truss reinforced concrete composite slab is not more than 2mm, and the thickness of the MF heat preservation plate is reserved around the side die, so that enough support strength is reserved between the pile layers in the stacking and transporting process.
A manufacturing and construction method of a primary and secondary beam one-step forming structure of a PC superposed beam comprises the following steps:
(1) firstly, configuring a main beam side mold according to the external dimension of a prefabricated superposed beam main beam in a design drawing, wherein a bottom mold adopts a conventional fixed bench mold;
(2) manufacturing a special end die for the notch according to the design size of the composite beam main beam; the width size of the special end die for the notch is equal to the width size of the main beam, the height size of the special end die for the notch is used for deducting the thickness size of the notch concrete, a protruding block of 100 x 30mm is arranged on the back surface of the patterned steel plate, the purpose of increasing the depth of the rough surface of the notch is achieved, the new concrete and the old concrete can be better glued conveniently,
(3) manufacturing the special die for the cross-shaped notch, firstly installing a side die on one side of the precast concrete composite beam main beam after a reinforcement cage of the composite beam main beam is hung to a bottom die, and installing the special end die for the notch by penetrating a horizontal reinforcement and the side die at the notch position, and attaching a grout stopping strip to the side die to avoid forming grout leakage;
(4) after the special end die for the notch is in place, the special die for the cross-shaped notch is installed, and the special die for the cross-shaped notch is fixed by bolts through positioning holes reserved on the installed superposed beam side die;
(5) installing a side mold on the other side of the main beam of the prefabricated superposed beam, adjusting the distance between the outward extending ribs, blocking a horizontal reinforcing steel bar preformed groove on the special end mold of the notch by a grout stopping rod, and pouring concrete;
(6) after final setting, steam curing is performed.
The invention has the beneficial effects that:
(1) the invention increases the process of prefabricating the crossed lap joint notch of the main beam and the secondary beam of the superposed beam in the assembled frame structure system, the superposed beam main beam does not break stressed steel bars and one-time pouring of concrete, thereby ensuring the structural performance integrity of the superposed beam main beam, avoiding the problem of poor concrete lamination and operation interference among different work types caused by segmental prefabrication and segmental installation in the construction process, improving the construction efficiency, reducing the labor cost and being beneficial to popularization and application of the assembled concrete structure.
(2) The invention adopts the special die for the cross-shaped notch, has flexible installation and adjustable error, reduces the difficulty degree of the notch manufacturing process, further reduces the production cost and improves the construction efficiency.
(3) The invention eliminates the problems of poor concrete gluing, slurry leakage and the like of the primary and secondary beam lap joint through the template effect of the cross-shaped notch. And the secondary die matching procedure after the conventional sectional prefabrication process is installed is cancelled, so that the construction consumption of the template is saved, and the popularization and the application of the prefabricated concrete structure are facilitated.
Drawings
FIG. 1 is a cross-sectional view of a secondary beam according to the present invention;
FIG. 2 is a three-dimensional view of a "cross" slot according to the present invention;
FIG. 3 is a three-dimensional view of the assembly of the primary and secondary beams of the cross-shaped notch of the present invention;
FIG. 4 is a front view of the special end mold and the special mold in the cross-shaped notch of the present invention;
FIG. 5 is a top view of the mold for the "cross" notch of the present invention;
FIG. 6 is a schematic view of the installation of the end mold for slot opening of the present invention;
FIG. 7 is a top view of the special end mold and the special mold in the cross-shaped notch of the present invention;
FIG. 8 is a front view of the male keyway steel block of the present invention;
FIG. 9 is a side form assembly three dimensional view of the present invention;
FIG. 10 is a three-dimensional view of the mold for the "cross" notch of the present invention;
list of reference symbols:
1. the main reinforcement, 2, stirrup, 3, concrete, 4, horizontal steel bar, 5, special end die for notch, 6, special die for cross notch, 7, cross notch, 8, secondary beam for superposed beam, 9, main beam for superposed beam, 10, protective layer, 11, second steel plate with pattern, 12, angle steel, 13, demoulding rod, 14, first positioning hole, 15, first steel plate with pattern, 16, side steel plate of special end die, 17, second positioning hole, 18, lug, 19, first screw hole, 20, long slotted hole, 21, second screw hole, 22, top steel plate of special end die, 23 and side die of main beam.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in the figure, the construction method of the primary and secondary beam one-step forming structure of the PC composite beam comprises the steps of firstly manufacturing two special end dies 5, reserving a horizontal steel bar notch 20 on a pattern steel plate I15 of the end dies 5 for enabling a steel bar cage to go in and out of two ends of a cross-shaped notch 7 after being in place, arranging a bolt hole 17 and a screw hole I19 on a steel plate 16 on the side surface of the end die for positioning and fixing with a side die 23 of the composite beam, and installing a convex key slot steel block 18 on the pattern steel plate I15 through a bolt II 21 on the inner side of the end die, wherein the upper and lower parts are shown in figures 1 and 4; the size of the special end die is consistent with that of the main beam and the secondary beam of the superposed beam, the side die is flat, and a grout stopping strip is attached to the front of the die for stopping grout, as shown in figure 9.
And (3) manufacturing the special die 6 for the cross-shaped notch, wherein the size of the second pattern steel plate 11 at the bottom is consistent with that of the cross-shaped notch 7, and the protective edges of angle steels 12 are subjected to spot welding at two sides, as shown in figures 4 and 5. The positioning holes 14 formed in the side faces of the angle steels are fastened with the side dies 23 of the superposed beam through bolts, the side dies are pasted with the grout stopping strips, the release agents are coated, and the angle steels are assembled with the side dies, as shown in fig. 9.
And after all the moulds are assembled, pouring concrete.
The maintenance of the component is completed to achieve the purpose of formwork removal at the age, the side formwork at one side is removed firstly, then two special end formworks 5 and the special die 6 for the cross-shaped notch are removed one by one, the formwork removal operation is completed, horizontal steel bars between the whole cross-shaped notch 7 do not need to be broken or anchored, the through length and the width of the notch are kept distributed, the length and the width of the notch meet the design standards, the protective layer 10 below is complete and stable in structure, square grooves (groove marks left by the convex blocks 18) are reserved at two ends of the cross-shaped notch 7, the purpose of increasing the depth of the rough surface of the notch is achieved, and new and old concrete can be glued.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.
Claims (5)
1. The utility model provides a PC superposed beam primary and secondary roof beam one shot forming structure which characterized in that: the special end die for the notch and the special die for the cross notch are arranged in the cross notch.
2. The primary and secondary beam one-step forming structure of the PC composite beam as claimed in claim 1, wherein: the special end dies for the notches are two in number and symmetrically arranged in a cross-shaped notch, each special end die for the notches comprises a first patterned steel plate, a first convex key slot steel block, a side steel plate and a top steel plate, the first patterned steel plate, the side steel plate and the top steel plate are assembled and welded into a rectangle, the first patterned steel plate is flush with the top of the side steel plate, the bottom of the first patterned steel plate is longer than the top of the side steel plate by 20mm, long slotted holes through which horizontal reinforcing steel bars pass are formed in the patterned steel plate, the number of the first convex key slot steel blocks is that the upper and lower key slot steel blocks are respectively arranged, the two convex key slot steel blocks are vertically arranged, the size of the convex key slot steel block is 100-100 mm, the thickness of the convex key slot steel block is 30mm, the inward chamfer angle is 45 degrees, the convex key slot steel blocks are screwed and fixed on the inner surface of the first patterned steel plate through the, and the long slotted hole is integrally utilized to penetrate through the horizontal steel bar of the main beam from top to bottom, and is positioned and fixed on the side surface of the main beam through the positioning hole II and the screw hole I, so that the cross-shaped notch is formed.
3. The primary and secondary beam one-step forming structure of the PC composite beam as claimed in claim 1, wherein: the special die for the cross-shaped notch comprises a second pattern steel plate, angle steel and a demoulding rod, wherein the second pattern steel plate is arranged above the bottom concrete position of the cross-shaped notch, the width dimension of the second pattern steel plate is consistent with that of the cross-shaped notch, two ends of the angle steel are fixed on two sides of the second pattern steel plate after being chamfered by 45 degrees, the side surfaces of the angle steel are flush with the second pattern steel plate, a gap of 1-2cm is reserved between the 45-degree inclined surfaces of the two ends of the angle steel and the 45-degree inclined surface of the bottom surface of the special end die for the notch, and a first positioning hole is formed in the side surface of the angle; the bottom of the demoulding rod is connected with the second patterned steel plate through threads and used for demoulding of the special mould.
4. The primary and secondary beam one-step forming structure of the PC composite beam as claimed in claim 1, wherein: the special die for the cross-shaped notch is T-shaped; the special die for the cross-shaped notch is assembled with the special end die for the notch before the side die for the superposed beam is installed, and is fastened on the side die through a bolt at one position of the positioning hole.
5. The primary and secondary beam one-step forming structure of the PC composite beam as claimed in claim 1, wherein: after the 'cross' -shaped notch of the precast concrete superposed beam main beam is formed and demoulded, a 50 x 5mm angle steel is arranged and connected to one side of the angle steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021657415.3U CN212927032U (en) | 2020-08-11 | 2020-08-11 | Primary and secondary beam one-step forming structure of PC superposed beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021657415.3U CN212927032U (en) | 2020-08-11 | 2020-08-11 | Primary and secondary beam one-step forming structure of PC superposed beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212927032U true CN212927032U (en) | 2021-04-09 |
Family
ID=75335648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021657415.3U Active CN212927032U (en) | 2020-08-11 | 2020-08-11 | Primary and secondary beam one-step forming structure of PC superposed beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212927032U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580324A (en) * | 2021-07-12 | 2021-11-02 | 五冶集团上海有限公司 | Concrete precast beam slot control device |
-
2020
- 2020-08-11 CN CN202021657415.3U patent/CN212927032U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580324A (en) * | 2021-07-12 | 2021-11-02 | 五冶集团上海有限公司 | Concrete precast beam slot control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111719849A (en) | Primary and secondary beam one-step forming structure of PC superposed beam and construction method thereof | |
| CN107245934A (en) | A kind of assembled steel profiled sheet concrete combined board small box girder | |
| CN109518858B (en) | Assembled beam plate connecting structure and construction method thereof | |
| CN104264786A (en) | Steel bar connection mode of prefabricated concrete member and application thereof | |
| CN108301545A (en) | A kind of big module overlapping contignation of the assembled with space truss temporary support | |
| CN114508175B (en) | Connecting node and connecting method for assembled reinforced concrete precast column and beam | |
| CN110512785B (en) | Unidirectional superimposed sheet with no rib at end rabbet and formwork structure and construction method | |
| CN110792025A (en) | Connection structure of assembled precast concrete decking and girder steel | |
| CN212534652U (en) | Steel-concrete composite structure frame-cast-in-place concrete shear wall structure system | |
| CN211522899U (en) | Long-span steel-concrete composite beam convenient to erect by bridge girder erection machine | |
| CN109868751B (en) | Assembled track beam concrete post-pouring notch, template and construction method | |
| CN113152742A (en) | Semi-prefabricated non-demolition waterproof superimposed shear wall structure | |
| CN111502080A (en) | Steel-concrete composite structure frame-cast-in-place concrete shear wall structure system | |
| CN210117650U (en) | Prefabricated reinforced concrete bridge deck of non-modular post-cast strip | |
| CN212927032U (en) | Primary and secondary beam one-step forming structure of PC superposed beam | |
| CN110644662A (en) | Prefabricated flat slab composite slab based on stress and splitting method thereof | |
| CN108018972B (en) | Full prefabricated floor slab and composite floor slab combined structure, manufacturing and assembling method | |
| CN214459548U (en) | Assembled steel and concrete combined rigid frame bridge | |
| CN212000571U (en) | Connection structure of assembled precast concrete decking and girder steel | |
| CN211848867U (en) | Tooth groove type prefabricated bridge pier and bearing platform connecting structure | |
| CN217204673U (en) | Connection node of prefabricated reinforced concrete column and beam | |
| CN214925420U (en) | Concrete bridge deck slab prefabricated steel formwork side form structure and side form comprising same | |
| CN215166896U (en) | Semi-prefabricated non-demolition-mold waterproof superimposed shear wall structure | |
| CN214574621U (en) | Node dry joining method assembly structure | |
| CN212926589U (en) | Assembly type formwork-dismantling-free structural body formwork and cast-in-place formwork-dismantling-free structural body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |