CN213868496U - Bidirectional laminated plate prestress close-splicing structure - Google Patents
Bidirectional laminated plate prestress close-splicing structure Download PDFInfo
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- CN213868496U CN213868496U CN202022664029.3U CN202022664029U CN213868496U CN 213868496 U CN213868496 U CN 213868496U CN 202022664029 U CN202022664029 U CN 202022664029U CN 213868496 U CN213868496 U CN 213868496U
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Abstract
The invention belongs to the technical field of assembled building structures, and particularly relates to a prestressed bidirectional laminated slab close-splicing structure; the specific technical scheme is as follows: the utility model provides a close piece together structure of two-way superimposed sheet prestressing force, includes the superimposed sheet bottom plate, has arranged a plurality of preformed grooves on the superimposed sheet bottom plate, and the one end of additional prestressing steel links to each other with the anchor clamps of preformed groove, and the other end of additional prestressing steel links to each other with the ground tackle of preformed groove, and has set up the stretch-draw prestressing force of additional prestressing steel, has arranged end muscle and distribution muscle on the superimposed sheet bottom plate, and concreting forms cast-in-place layer on the superimposed sheet bottom plate, and the pre-buried gluten that has in the cast-in-place, distribution muscle and truss muscle, the utility model discloses a mode of exerting prestressing force has strengthened the compressive property of concrete between the superimposed sheet crack, under the condition that does not increase plate thickness and steel content, has promoted the superimposed sheet and has born the ability of long-term load or dynamic load, has effectively solved traditional two-way superimposed sheet concatenation back stress performance difference, the problem of easy fracture.
Description
Technical Field
The invention belongs to the technical field of assembled building structures, and particularly relates to a prestressed bidirectional laminated slab close-splicing structure.
Background
With the vigorous popularization and gradual refinement and improvement of the assembly type policy by the country, the assembly type building in China develops very rapidly in recent years, and the assembly type building develops in a new and different way from the initial application and trial project to the present comprehensive popularization and implementation; the horizontal members such as the laminated slabs are mostly applied, and although the construction method and the process flow of the laminated slabs are standardized and streamlined, some problems, such as cracking, deformation, leakage and the like at slab seams after the laminated slabs are spliced, are inevitable at the construction stage and the operation and maintenance stage, so that adverse effects of long-term loads on the slab seams are considered during the splicing of the laminated slabs.
When the laminated slab is installed by using a close-fitting method, weak parts are arranged between slab joints, and cracking is easy to occur under the action of long-term load; if the reinforcing steel bars can be tensioned between the two laminated slabs, the pre-pressure between the slabs reduces or offsets the concrete tensile stress caused by slab load, even the slabs are in a pressed state, and the risk of slab cracking can be well controlled.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a prestressed close-splicing structure of a bidirectional laminated slab, which reduces the stress relaxation between close-splicing slab joints in a mode of loading prestress between two adjacent slabs, enhances the resistance performance of concrete between slab joints of the laminated slab, avoids the problems of deformation, overlarge deflection, cracking and the like of the laminated slab in the long-term use process, and can realize good splicing of the bidirectional laminated slab.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a two-way coincide board prestressing force close-fitting structure, includes coincide daughter board, coincide mother board and many additional prestressing steel, leaves the concatenation seam between adjacent coincide daughter board and the coincide mother board, and the width of concatenation seam is not more than 10 mm. The laminated sub-plate is provided with a plurality of reserved sub-grooves, the laminated mother plate is provided with a plurality of reserved mother grooves corresponding to the reserved sub-grooves, the reserved sub-grooves and the corresponding reserved mother grooves form the reserved grooves, the depth of each reserved groove is 30mm, the width of each reserved groove is 15mm, the groove length of each reserved groove is 20mm longer than the length of each additional prestressed reinforcement, and the groove width of each template reserved groove at the end part of each additional prestressed reinforcement is not smaller than 40 mm.
Muscle and a plurality of daughter boards distribution muscle at the bottom of the pre-buried a plurality of daughter boards in the coincide daughter board, the top of muscle at the bottom of the daughter board is arranged in to the daughter board distribution muscle, and the muscle is arranged in the reservation sub-groove at the bottom of the daughter board, and muscle equidistance interval arrangement at the bottom of a plurality of daughter boards, muscle and daughter board distribution muscle are arranged perpendicularly at the bottom of the daughter board, and a plurality of daughter boards distribute the equidistant interval arrangement of muscle, and the bar at the bottom of the daughter board constitutes network structure with the daughter board distribution muscle, and network structure's bearing capacity is strong.
Muscle and a plurality of mother board distribution muscle at the bottom of the pre-buried a plurality of mother boards in the coincide mother board, the muscle is arranged in parallel to reservation mother groove at the bottom of the mother board, muscle equidistance interval arrangement at the bottom of a plurality of mother boards, and muscle and mother board distribution muscle are arranged perpendicularly at the bottom of the mother board, and a plurality of mother board distribution muscle equidistance interval arrangement, the bar constitutes network structure with mother board distribution muscle at the bottom of the mother board, and network structure's bearing capacity is strong.
And each reserved sub-groove is internally provided with a clamp which is fixed on the bottom rib of the daughter board, and each reserved main groove is internally provided with an anchorage which is fixed on the bottom rib of the mother board. The length of additional prestressed reinforcement needs to satisfy anchor length, after the concatenation of superimposed sheet bottom plate is accomplished, put into the reservation inslot with additional prestressed reinforcement, the one end swing joint of additional prestressed reinforcement is in anchor clamps, the other end swing joint of additional prestressed reinforcement is in the ground tackle that corresponds the reservation groove, and set up the tensile prestress of additional prestressed reinforcement, can effectively reduce the stress relaxation between close superimposed sheet seam, promote the total resistance after the concatenation of two-way superimposed sheet, avoid the fracture problem that the two-way superimposed sheet of close superimposition appears in long-term load effect process.
After the prestressing force reinforcing steel is fixed, pour from last to down from the closely knit concrete of self-compaction until the bottom plate face, pour and accomplish the back, form cast-in-place layer at the top of coincide daughter board and coincide mother board, in order to improve cast-in-place layer's tensile strength and intensity, in cast-in-place in situ pre-buried cast-in-place layer gluten and cast-in-place layer distribution muscle have, cast-in-place layer distribution muscle arranges the below of cast-in-place layer gluten in, cast-in-place layer gluten and cast-in-place.
In order to increase the rigidity of the whole close-spliced structure, a plurality of truss ribs are fixed on the bottom ribs of the daughter boards and the bottom ribs of the mother board, and the ribs of the cast-in-place layer are fixed at the tops of the truss ribs.
The width of one end of the reserved female groove is larger than that of the reserved sub-groove, and therefore positioning of the prestressed reinforcement is facilitated.
Preferably, the reserved sub-grooves arranged on the superposed sub-plate are arranged at equal intervals, and the interval between every two adjacent reserved sub-grooves is 300 mm; the reserved mother grooves arranged on the laminated mother board are arranged at equal intervals, and the interval between every two adjacent reserved mother grooves is 300 mm.
The top end of the superposed daughter board arranged on one side of the splicing seam is provided with an upper cut angle of the daughter board, the inclination angle of the upper cut angle of the daughter board is 15 degrees, more connection of a cast-in-place layer is facilitated, the bottom end of the superposed daughter board arranged on one side of the splicing seam is provided with a lower cut angle of the daughter board, the inclination angle of the lower cut angle of the daughter board is 45 degrees, and leveling and anti-cracking mortar plastering at the bottom of the daughter board are facilitated.
The top end of the superposed mother board arranged on one side of the splicing seam is provided with a mother board upper chamfer, the inclination angle of the mother board upper chamfer is 15 degrees, more connection of a cast-in-place layer is facilitated, the bottom end of the superposed mother board arranged on one side of the splicing seam is provided with a mother board lower chamfer, the inclination angle of the mother board lower chamfer is 45 degrees, and leveling and anti-cracking mortar plastering of the board bottom are facilitated.
In order to ensure the structural strength of the close splicing structure, the diameter of the additional prestressed steel bar is not less than that of the motherboard bottom bar, and the additional prestressed steel bar can be replaced by prestressed steel wires or steel strands and other materials.
The concrete strength grade of the cast-in-place layer is not lower than C40.
The width of the splicing seam is not more than 10mm, and after the construction of the laminated slab is completed, the bottom of the laminated slab is subjected to pointing and leveling by using anti-cracking mortar.
Compared with the prior art, the utility model, specifically beneficial effect is embodied in:
the utility model provides a new two-way superimposed sheet mosaic structure has effectively solved the poor, easy problem that ftractures of atress performance behind the concatenation of traditional two-way superimposed sheet.
Two, the utility model discloses a mode of applying prestressing force has strengthened the resistance performance of concrete between the superimposed sheet board seam, under the condition that does not increase thick and steel content, has promoted the superimposed sheet and has born the ability of long-term load or dynamic load, and the effectual indoor clear high requirement of having guaranteed has practiced thrift economic cost.
Thirdly, the utility model discloses a factory prefabrication is uncomplicated, and the technological process is easy to operate, can implement by a large scale, and the popularization degree is higher.
Drawings
Fig. 1 is when not pouring cast-in-place layer, the utility model discloses a overlook the structure sketch map.
Fig. 2 is a layout diagram of the positions of the reserved subslots on the stacked daughter boards in fig. 1.
Fig. 3 is a layout diagram of the position of the reserved mother slot on the laminated mother board in fig. 1.
Fig. 4 is a sectional view of the laminated daughter board and the laminated mother board when the cast-in-place layer is not cast.
Fig. 5 is the utility model discloses a concatenation cross-sectional view.
In the figure, 1 is the superimposed sheet bottom plate, 2 is the superimposed daughter board, 21 is the reservation subslot, 22 is daughter board bottom rib, 23 is daughter board distribution rib, 24 is anchor clamps, 25 is daughter board upper corner cut, 26 is daughter board lower corner cut, 3 is the superimposed mother board, 31 is the reservation mother groove, 32 is mother board bottom rib, 33 is mother board distribution rib, 34 is the ground tackle, 35 is mother board upper corner cut, 36 is mother board lower corner cut, 4 is additional prestressed reinforcement, 5 is the concatenation seam, 6 is cast-in-place layer, 7 is cast-in-place layer gluten, 8 is cast-in-place layer distribution rib, 9 is the truss muscle.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-5, a two-way laminated plate prestress close-splicing structure comprises a laminated daughter board 2, a laminated mother board 3 and a plurality of additional prestress reinforcements 4, wherein a splicing seam 5 is reserved between the laminated daughter board 2 and the laminated mother board 3, and the width of the splicing seam 5 is not more than 10 mm. A plurality of reserved sub-grooves 21 are formed in the laminated sub-plate 2, a plurality of reserved main grooves 31 corresponding to the reserved sub-grooves 21 are formed in the laminated mother plate 3, the reserved sub-grooves 21 and the corresponding reserved main grooves 31 form reserved grooves, the depth of each reserved groove is 30mm, the width of each reserved groove is 15mm, the length of each reserved groove is 20mm longer than that of each additional prestressed reinforcement 4, and the width of each template reserved groove at the end part of each additional prestressed reinforcement 4 is not smaller than 40 mm.
And a clamp 24 is arranged in each reserved sub-groove 21, the clamp 24 is fixed on the daughter board bottom rib 22, an anchorage device 34 is arranged in each reserved female groove 31, and the anchorage device 34 is fixed on the mother board bottom rib 32. The length of additional prestressing steel 4 needs to satisfy anchor length, after 1 concatenation of superimposed sheet bottom plate is accomplished, put into the preformed groove with additional prestressing steel 4, the one end swing joint of additional prestressing steel 4 is in anchor clamps 24, the other end swing joint of additional prestressing steel 4 is in the anchorage device 34 that corresponds, and set up the tensioning prestressing force of additional prestressing steel 4, can effectively reduce the stress relaxation between close amalgamation board seam, promote the total resistance after the concatenation of two-way superimposed sheet, avoid the problem that the fracture appears in the two-way superimposed sheet of close amalgamation in the long-term load effect process.
After the prestressing force reinforcing steel is fixed, pour from last to down from the closely knit concrete of self-compaction until the bottom plate face, pour and accomplish the back, form cast-in-place layer 6 at the top of coincide daughter board 2 and coincide mother board 3, in order to improve cast-in-place layer 6's tensile strength and intensity, pre-buried cast-in-place layer gluten 7 and cast-in-place layer distribution muscle 8 that has in cast-in-place layer 6, cast-in-place layer distribution muscle 8 arranges the below of cast-in-place layer gluten 7 in, cast-in-place layer gluten 7 and cast-in-place layer distribution muscle 8 arrange perpendicularly and form network structure.
In order to increase the rigidity of the whole close-spliced structure, a plurality of truss ribs 9 are fixed on the daughter board bottom rib 22 and the mother board bottom rib 32, and the gluten 7 of the cast-in-place layer is fixed on the tops of the truss ribs 9.
The width of one end of the reserved female groove 31 is larger than that of the reserved sub-groove 21, and therefore positioning of the prestressed reinforcement is facilitated.
Preferably, the reserved sub-slots 21 arranged on the laminated sub-plate 2 are arranged at equal intervals, and the interval between every two adjacent reserved sub-slots 21 is 300 mm; the reserved female slots 31 arranged on the laminated mother board 3 are arranged at equal intervals, and the interval between the adjacent reserved female slots 31 is 300 mm.
2 tops of the coincide daughter board of arranging in 5 one sides of concatenation seam are opened and are had chamfer 25 on the daughter board, and chamfer 25's inclination on the daughter board is 15, is favorable to cast-in-place layer 6 more connections, and 2 bottoms of the coincide daughter board of 5 one sides of concatenation seam are arranged in to the daughter board are opened and are had chamfer 26 under the daughter board, and chamfer 26's inclination under the daughter board is 45, is favorable to the board end to make level and wipe crack control mortar.
The top end of the superposed mother board 3 arranged on one side of the splicing seam 5 is provided with a mother board upper chamfer 35, the inclination angle of the mother board upper chamfer 35 is 15 degrees, more connection of a cast-in-situ layer 6 is facilitated, the bottom end of the superposed mother board 3 arranged on one side of the splicing seam 5 is provided with a mother board lower chamfer 36, the inclination angle of the mother board lower chamfer 36 is 45 degrees, and leveling and anti-cracking mortar plastering at the bottom of the board are facilitated.
In order to ensure the structural strength of the close splicing structure, the diameter of the additional prestressed reinforcement 4 is not smaller than that of the motherboard bottom reinforcement 32, and the additional prestressed reinforcement 4 can be replaced by prestressed wires or steel strands and other materials.
The concrete strength grade of the cast-in-situ layer 6 is not lower than C40.
The width of the splicing seam 5 is not more than 10mm, and after the construction of the laminated slab is completed, the bottom of the laminated slab is subjected to pointing and leveling by using anti-cracking mortar.
The construction process of the close splicing structure is as follows: superimposed sheet bottom plate 1 divide into superimposed daughter board 2 and superimposed mother board 3, leave the clearance between superimposed daughter board 2 and the superimposed mother board 3 and form concatenation seam 5, be equipped with reservation daughter groove 21 on superimposed daughter board 2, be equipped with reservation mother groove 31 on superimposed mother board 3, reservation daughter groove 21 constitutes the reservation groove with the reservation mother groove 31 that corresponds, reservation daughter groove 21 and the reservation mother groove 31 that corresponds are arranged in on same water flat line, be 300mm apart from between the adjacent reservation groove, the reservation groove is arranged perpendicularly with concatenation seam 5.
60mm behind the superimposed sheet bottom plate 1, the degree of depth of reserving sub-groove 21 and reservation master groove 31 is 30mm, and the groove length of reservation groove is longer 20mm than additional prestressing steel 4, and the groove width of reservation master groove 31 in additional prestressing steel 4 tip must not be less than 40mm to operating space when guaranteeing to apply prestressing force.
The length of the additional prestressed steel bar 4 needs to meet the anchoring length, and the diameter of the additional prestressed steel bar 4 is not less than that of the stressed steel bar at the bottom of the plate. The laminated slab bottom plate 1 is bound with the daughter board bottom ribs 22, the daughter board distribution ribs 23, the mother board bottom ribs 32, the mother board distribution ribs 33 and the truss ribs 9 in a factory, the daughter grooves 21 and the reserved mother grooves 31 are reserved according to design intervals, meanwhile, the fixing clamp 24 is arranged on the reserved daughter grooves 21, the anchorage device 34 is fixed on the reserved mother grooves 31, and concrete on the laminated slab bottom plate 1 is poured.
Transporting laminated slab bottom plate 1 to the project site, hoisting in proper order and laying, after waiting to accomplish, will cut in advance additional prestressing steel 4 and put into the reservation tank in proper order, the one end of additional prestressing steel 4 is fixed in the anchor clamps 24 of reservation tank one end, the other end of additional prestressing steel 4 is fixed in the anchorage device 34 of the reservation tank other end, at anchorage device 34 department stretch-draw prestressing force, after stretch-draw finishing, pour into the face of self-compaction concrete up to laminated slab bottom plate 1 in the reservation tank, the self-compaction concrete strength grade of pouring must not be less than C40.
And placing the cast-in-place layer gluten 7 and the cast-in-place layer distribution ribs 8 according to a drawing, supporting and pouring concrete to form the cast-in-place layer 6.
And (3) removing the support after the strength of the concrete meets the requirement, and pointing and leveling the plate joint of the bottom plate 1 of the composite slab by using anti-cracking mortar.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included therein.
Claims (10)
1. The bidirectional superposed plate prestress close splicing structure is characterized by comprising a superposed daughter board (2), a superposed mother board (3) and a plurality of additional prestress steel bars (4), wherein a splicing seam (5) is reserved between the superposed daughter board (2) and the superposed mother board (3), a plurality of reserved sub-grooves (21) are formed in the superposed daughter board (2), a plurality of reserved main grooves (31) corresponding to the reserved sub-grooves (21) are formed in the superposed mother board (3), and the reserved sub-grooves (21) and the corresponding reserved main grooves (31) form reserved grooves;
the laminated sub-board (2) is internally pre-embedded with sub-board bottom ribs (22) and sub-board distribution ribs (23), the sub-board bottom ribs (22) are arranged in parallel to the reserved sub-grooves (21), the sub-board bottom ribs (22) are arranged at equal intervals, the sub-board bottom ribs (22) and the sub-board distribution ribs (23) are arranged vertically, the sub-board distribution ribs (23) are arranged at equal intervals, and the sub-board bottom ribs (22) and the sub-board distribution ribs (23) form a net-shaped structure;
mother board bottom ribs (32) and mother board distribution ribs (33) are pre-embedded in the superposed mother board (3), the mother board bottom ribs (32) are arranged in parallel to the reserved mother grooves (31), the mother board bottom ribs (32) are arranged at equal intervals, the mother board bottom ribs (32) and the mother board distribution ribs (33) are arranged vertically, the mother board distribution ribs (33) are arranged at equal intervals, and the mother board bottom ribs (32) and the mother board distribution ribs (33) form a net-shaped structure;
a clamp (24) is arranged in each reserved sub-groove (21), the clamp (24) is fixed on the daughter board bottom rib (22), an anchor (34) is arranged in each reserved mother groove (31), the anchor (34) is fixed on the mother board bottom rib (32), one end of each additional prestressed steel bar (4) is movably connected into the clamp (24), and the other end of each additional prestressed steel bar (4) is movably connected into the corresponding anchor (34);
a cast-in-place layer (6) is poured on the tops of the composite daughter board (2) and the composite mother board (3), and cast-in-place layer gluten (7) and cast-in-place layer distribution ribs (8) are pre-buried in the cast-in-place layer (6);
all fix a plurality of truss muscle (9) on muscle (32) at the bottom of daughter board bottom muscle (22) and the mother board, cast-in-place layer muscle (7) are fixed at the top of a plurality of truss muscle (9).
2. The prestressed close-fitting structure of a bidirectional laminated plate as claimed in claim 1, wherein the width of one end of said reserved female slot (31) is greater than the width of the reserved male slot (21).
3. The prestressed close-fitting structure of two-way superimposed plates as claimed in claim 2, wherein said plurality of preformed sub-slots (21) disposed on said superimposed sub-plates (2) are equidistantly spaced, and said plurality of preformed main slots (31) disposed on said superimposed main plate (3) are equidistantly spaced.
4. The prestressed close-fitting structure of a two-way laminated plate as claimed in claim 3, wherein said sub-plate distribution ribs (23) are disposed above the sub-plate bottom ribs (22).
5. The prestressed close-fitting structure of a bidirectional laminated plate as claimed in claim 4, wherein said cast-in-place layer distribution rib (8) is placed under the cast-in-place layer rib (7).
6. The prestressed close-splicing structure of a two-way superimposed plate according to claim 5, characterized in that the top end of the superimposed sub-plate (2) arranged at one side of the splicing seam (5) is provided with a sub-plate upper chamfer (25), and the bottom end of the superimposed sub-plate (2) arranged at one side of the splicing seam (5) is provided with a sub-plate lower chamfer (26); the top end of the laminated mother board (3) arranged at one side of the splicing seam (5) is provided with a mother board upper chamfer (35), and the bottom end of the laminated mother board (3) arranged at one side of the splicing seam (5) is provided with a mother board lower chamfer (36).
7. The prestressed close-fitting structure of a bidirectional laminated plate as claimed in claim 6, wherein the diameter of said additional prestressed reinforcement (4) is not smaller than the diameter of the bottom reinforcement (32) of the mother plate.
8. The prestressed close-fitting structure of two-way laminated plate according to claim 7, characterized by that the concrete strength grade of said cast-in-situ layer (6) is not less than C40.
9. The prestressed close-fitting structure of a two-way laminated slab as claimed in claim 8, wherein the inclination angle of said sub-slab upper chamfer (25) is 15 ° and the inclination angle of said sub-slab lower chamfer (26) is 45 °; the inclination angle of the upper tangent angle (35) of the mother plate is 15 degrees, and the inclination angle of the lower tangent angle (36) of the mother plate is 45 degrees.
10. The prestressed close-fitting structure of a two-way laminated slab as claimed in claim 9, wherein the width of said splicing seam (5) is not greater than 10 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022664029.3U CN213868496U (en) | 2020-11-18 | 2020-11-18 | Bidirectional laminated plate prestress close-splicing structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022664029.3U CN213868496U (en) | 2020-11-18 | 2020-11-18 | Bidirectional laminated plate prestress close-splicing structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323213A (en) * | 2021-06-04 | 2021-08-31 | 重庆大学 | Assembled trompil steel sheet rib superimposed sheet |
| CN114934620A (en) * | 2022-07-07 | 2022-08-23 | 南京旭浦建材科技有限公司 | Assembled superimposed sheet |
| CN115450327A (en) * | 2022-09-01 | 2022-12-09 | 深圳市臻道建筑科技有限公司 | Method for constructing box-type building and box-type building constructed by same |
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2020
- 2020-11-18 CN CN202022664029.3U patent/CN213868496U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323213A (en) * | 2021-06-04 | 2021-08-31 | 重庆大学 | Assembled trompil steel sheet rib superimposed sheet |
| CN113323213B (en) * | 2021-06-04 | 2022-09-30 | 重庆大学 | Assembled trompil steel sheet rib superimposed sheet |
| CN114934620A (en) * | 2022-07-07 | 2022-08-23 | 南京旭浦建材科技有限公司 | Assembled superimposed sheet |
| CN114934620B (en) * | 2022-07-07 | 2023-12-01 | 南京旭浦建材科技有限公司 | Assembled superimposed sheet |
| CN115450327A (en) * | 2022-09-01 | 2022-12-09 | 深圳市臻道建筑科技有限公司 | Method for constructing box-type building and box-type building constructed by same |
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