CN114319675A - Support-free prefabricated one-way laminated slab with limiting device and construction method - Google Patents
Support-free prefabricated one-way laminated slab with limiting device and construction method Download PDFInfo
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- CN114319675A CN114319675A CN202210165708.7A CN202210165708A CN114319675A CN 114319675 A CN114319675 A CN 114319675A CN 202210165708 A CN202210165708 A CN 202210165708A CN 114319675 A CN114319675 A CN 114319675A
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 85
- 239000010959 steel Substances 0.000 claims abstract description 85
- 239000002131 composite material Substances 0.000 claims abstract description 71
- 239000011178 precast concrete Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims description 26
- 238000012545 processing Methods 0.000 claims description 12
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 1
- 210000002435 tendon Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000002787 reinforcement Effects 0.000 description 11
- 238000005452 bending Methods 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
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Abstract
The invention relates to a support-free prefabricated one-way laminated slab with a limiting device and a construction method. This take stop device exempt from to support prefabricated one-way superimposed sheet includes: prefabricating a one-way laminated slab main body and a limiting device; prefabricated one-way superimposed sheet main part includes precast concrete layer and a plurality of steel bar truss who sets up along precast concrete layer width direction interval, stop device sets up the both ends on prefabricated one-way superimposed sheet main part length direction to support and restrict prefabricated one-way superimposed sheet main part and be located preset position. According to the invention, the prefabricated composite slab is not required to be provided with a support within 3.6m span in the construction process, the displacement of the prefabricated unidirectional composite slab main body placed on the preset position in the hoisting construction stage is controlled, the prefabricated unidirectional composite slab main body is prevented from slipping off the steel beam, the potential safety hazard in the construction process is avoided, the construction efficiency is improved, the manpower and material resources are saved, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a support-free prefabricated one-way laminated slab with a limiting device and a construction method.
Background
In recent years, in order to solve the problem of surplus steel structure capacity in China and accelerate the development process of green buildings, the application of steel structures and assembly type buildings is vigorously pursued by China, and the application of prefabricated laminated slabs in steel structure buildings is increasingly wide.
The traditional prefabricated unidirectional composite slab has the advantages of high construction speed and short construction period of a steel structure building, and consumes a large amount of manpower and material resources, and the situation that the prefabricated unidirectional composite slab slips off from a steel beam easily occurs to cause safety accidents.
Disclosure of Invention
In order to solve the technical problems, the invention provides a support-free prefabricated one-way composite slab with a limiting device and a construction method, which realize that the prefabricated composite slab does not need to be provided with a support when spanning an inner plate within 3.6m in the construction process, and simultaneously realize the control of the displacement of the prefabricated one-way composite slab main body on a preset position in the hoisting construction stage, prevent the prefabricated one-way composite slab main body from slipping from a steel beam, avoid the potential safety hazard in the construction process, improve the construction efficiency, save manpower and material resources and reduce the construction cost.
In order to achieve the above object, on one hand, the invention adopts the technical scheme that: a take stop device's prefabricated one-way superimposed sheet of exempting from to support includes: prefabricating a one-way laminated slab main body and a limiting device; prefabricated one-way superimposed sheet main part includes precast concrete layer and a plurality of steel bar truss who sets up along precast concrete layer width direction interval, stop device sets up the both ends on prefabricated one-way superimposed sheet main part length direction to support and restrict prefabricated one-way superimposed sheet main part and be located preset position.
Through adopting this technical scheme, steel bar truss's setting, bending stiffness and bearing capacity have been improved greatly, it need not to set up the support to have realized that the inboard strides within 3.6m in the work progress, the time of the temporary support is set up on the scene that has significantly reduced, furthermore, spacing setting, the displacement volume on the preset position is placed at hoist and mount construction stage to the prefabricated one-way superimposed sheet main part of control has been realized, prevent that prefabricated one-way superimposed sheet main part from slipping from the girder steel, the potential safety hazard in the work progress has been avoided, the efficiency of construction is improved, manpower and material resources have been practiced thrift.
Preferably, the steel bar truss comprises two upper chord bars arranged in parallel, two lower chord bars arranged in parallel and a web rib, the two lower chord bars are pre-embedded in a precast concrete layer and penetrate through the length direction of the precast concrete layer, the two upper chord bars are arranged above the precast concrete layer, the cross sections of the two upper chord bars and the two lower chord bars form a quadrangle, the web rib is fixedly connected with the two upper chord bars and the two lower chord bars along the cross section, the web rib is of a quadrangular frame structure with an opening at the lower end, and a plurality of web ribs are uniformly distributed along the length direction of the upper chord bars and the lower chord bars.
By adopting the technical scheme, the steel bar truss adopts two upper chord reinforcements, and the diameter of the upper chord reinforcements of the steel bar truss is larger than that of the upper chord reinforcements of a common steel bar truss, so that the bending rigidity and the bearing capacity of the prefabricated unidirectional composite slab are greatly improved, the span of the slab within 3.6m in the construction process is not required to be provided with a support, the time for building a temporary support on site is greatly reduced, the construction efficiency is improved, and the manpower and material resources are saved; the diameter of the upper chord steel bar is larger, so that the upper chord steel bar can be used as a stressed steel bar, and the integral bearing capacity of the floor slab is improved; in the scheme, the distance between the upper chord ribs and the prefabricated concrete layer in the allowed range is higher, and the bending rigidity and the bearing capacity of the prefabricated unidirectional composite slab are higher.
Preferably, the limiting device comprises a steel beam and a plurality of limiting pieces which are uniformly distributed and fixedly arranged on the upper surface of the steel beam; the prefabricated one-way superimposed sheet main part is placed at the girder steel upper surface, and the horizontal displacement of prefabricated one-way superimposed sheet main part along length direction is subject to the locating part, and the prefabricated one-way superimposed sheet main part is fixed through cast in situ concrete with stop device after reaching preset position.
By adopting the technical scheme, the limiting piece is fixedly arranged on the upper surface of the steel beam, so that the displacement of the prefabricated unidirectional composite slab main body placed on the preset position in the hoisting construction stage is controlled, the prefabricated unidirectional composite slab main body is prevented from slipping off the steel beam, and the potential safety hazard in the construction process is avoided; the locating part can strengthen being connected of girder steel and floor simultaneously, plays shear bolt nail's effect, improves the wholeness of structure, and this stop device way is simple, and the feasibility of practising is strong.
Preferably, the prefabricated unidirectional composite slab main part still includes a plurality of atress reinforcing bars, and is a plurality of atress reinforcing bar is along precast concrete layer width direction equipartition pre-buried in precast concrete layer, and is a plurality of the parallel length direction who runs through precast concrete layer of atress reinforcing bar.
Preferably, the prefabricated unidirectional composite slab main part still includes a plurality of distribution reinforcing bars, and is a plurality of distribution reinforcing bar is pre-buried in precast concrete layer along precast concrete layer length direction equipartition, and the parallel width direction who runs through precast concrete layer of a plurality of distribution reinforcing bars.
By adopting the technical scheme, the bending rigidity and the bearing capacity of the main body of the prefabricated unidirectional composite slab are improved.
Preferably, the lower chord reinforcements and the stressed reinforcements are arranged at intervals along the width direction of the precast concrete layer.
By adopting the technical scheme, the lower chord rib is also used as a stressed reinforcing steel bar, so that the bending rigidity and the bearing capacity of the main body of the prefabricated unidirectional composite slab are improved, the stress balance of the main body of the prefabricated unidirectional composite slab is realized, and the strength balance of the main body of the prefabricated unidirectional composite slab is ensured.
On the other hand, the invention provides a construction method of a support-free prefabricated unidirectional composite slab with a limiting device, which comprises the following steps:
s1, processing a prefabricated one-way laminated slab main body;
s2, constructing a limiting device;
and S3, mounting the support-free prefabricated unidirectional laminated slab.
Preferably, the S1 includes the following steps:
s1a, cleaning a template of a main body of the prefabricated unidirectional composite slab, and preparing a steel bar for processing;
s1b, binding bottom layer stressed steel bars and distribution steel bars;
s1c, binding a steel bar truss;
s1d, pouring concrete;
s1e, maintaining;
s1f, demolding the prefabricated unidirectional composite slab main body.
Preferably, the S2 includes the following steps:
s2a, processing a steel beam according to the length required by a drawing;
s2b, preparing materials required by processing the limiting piece;
s2c, welding the limiting piece to the upper surface of the steel beam;
s2d, spraying anticorrosive paint.
Preferably, the S3 includes the following steps:
s3a, transporting the prefabricated unidirectional laminated slab main body and the limiting device to a construction site;
s3b, hoisting the limiting device to a preset position;
s3c, hoisting the main body of the prefabricated unidirectional composite slab to a preset position, and limiting the installation position by a limiting device;
s3d, binding stress steel bars at the top of the floor slab;
s3e, pouring concrete;
s3f, construction and maintenance.
In summary, the invention has the following beneficial technical effects:
1. by adopting the steel bar truss provided with the two upper chord ribs, the bending rigidity and the bearing capacity are greatly improved, the plate span within 3.6m in the construction process is free from support, the time for building temporary support on site is greatly reduced, the construction efficiency is improved, and the manpower and material resources are saved; and the diameter of the upper chord steel bar is larger, so that the upper chord steel bar can be used as a stressed steel bar, and the integral bearing capacity of the floor slab is improved.
2. The limiting piece is fixedly arranged on the upper surface of the steel beam and serves as a limiting device, so that the displacement of the prefabricated unidirectional composite slab main body when the prefabricated unidirectional composite slab main body is placed on a preset position in a hoisting construction stage is controlled, the prefabricated unidirectional composite slab main body is prevented from slipping off the steel beam, and potential safety hazards in the construction process are avoided; the locating part can strengthen being connected of girder steel and floor simultaneously, plays shear bolt nail's effect, improves the wholeness of structure, and this stop device way is simple, and the feasibility of practising is strong.
3. By adopting the technical scheme that the lower chord reinforcements and the stressed reinforcements are uniformly arranged at intervals in the width direction of the precast concrete layer, the lower chord reinforcements can be used as the stressed reinforcements, the bending rigidity and the bearing capacity of the precast one-way composite slab main body are improved, the stress balance of the precast one-way composite slab main body is realized, and the strength balance of the precast one-way composite slab main body is ensured.
Drawings
FIG. 1 is a schematic cross-sectional view of a support-free prefabricated unidirectional composite slab with a limiting device;
FIG. 2 is a schematic view of a prefabricated unidirectional laminate body;
FIG. 3 is a schematic view of a steel bar truss;
FIG. 4 is a schematic view of the arrangement of the stressed reinforcement and the distribution reinforcement;
fig. 5 is a schematic view of the matching installation of the prefabricated unidirectional composite slab main body and the limiting device.
Description of reference numerals: 1-prefabricating a one-way laminated slab main body; 11-prefabricating a concrete layer;
12-steel bar trusses; 121-upper chord ribs; 122-lower chord rib; 123-abdominal muscle;
13-stressed steel bars; 14-distributing reinforcing steel bars;
2-a limiting device; 21-steel beam; 22-a stop.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment discloses a support-free prefabricated one-way composite slab with a limiting device, which refers to fig. 1 and 2 and comprises a prefabricated one-way composite slab main body 1 and a limiting device 2; the prefabricated unidirectional composite slab main body 1 comprises a prefabricated concrete layer 11 and a plurality of steel bar trusses 12 arranged at intervals along the width direction of the prefabricated concrete layer 11, and the limiting devices 2 are arranged at two ends of the prefabricated unidirectional composite slab main body 1 in the length direction so as to support and limit the prefabricated unidirectional composite slab main body 1 to be located at a preset position; fig. 1 shows that three prefabricated unidirectional composite slab main parts 1 are placed side by side along length direction, and fig. 1 still includes two stop device 2 that are located 1 length direction both ends of prefabricated unidirectional composite slab main part, and stop device 2 can realize for the welding arch, also can set up the recess and realize, and steel bar truss can be that the cross-section is the rectangle, also can be the strong structure of rigidity such as trapezoidal.
Referring to fig. 2 and 3, the steel bar truss 12 includes two upper chord bars 121 arranged in parallel, two lower chord bars 122 arranged in parallel and a web bar 123, the two lower chord bars 122 are pre-embedded in the precast concrete layer 11 and penetrate through the length direction of the precast concrete layer 11, and above the precast concrete layer 11 of the two upper chord bars 121, the higher the distance between the upper chord bars 121 and the precast concrete layer is within an allowable range, the stronger the bending rigidity and the bearing capacity of the precast unidirectional composite slab are; the cross sections of the two upper chord ribs 121 and the two lower chord ribs 122 form a quadrangle, the web rib 123 is fixedly connected with the two upper chord ribs 121 and the two lower chord ribs 122 along the cross section, the web rib 123 is of a quadrangular frame structure with an opening at the lower end, and a plurality of web ribs 123 are uniformly distributed along the length direction of the upper chord ribs 121 and the lower chord ribs 122.
Referring to fig. 1 and 5, the limiting device 2 comprises a steel beam 21 and a plurality of limiting parts 22 uniformly welded on the upper surface of the steel beam 21, the limiting parts 22 can be materials such as steel bars, angle irons, i-steels, square steels and steel plates which are convenient to take materials and discharge, the prefabricated unidirectional composite slab main body 1 is placed on the upper surface of the steel beam 21, the horizontal displacement of the prefabricated unidirectional composite slab main body 1 along the length direction is limited by the limiting parts 22, and the prefabricated unidirectional composite slab main body 1 is fixed with the limiting device 2 through cast-in-place concrete after reaching a preset position; if there is not locating part 22, prefabricated one-way superimposed sheet main part 1 can't be injectd along its length direction's displacement volume, when placing girder steel 21 on one end of prefabricated one-way superimposed sheet main part 1 and cross partially, the other end of prefabricated one-way superimposed sheet main part 1 has the dangerous emergence that drops, the bearing length scope of prefabricated one-way superimposed sheet main part 1 is reserved on every side of girder steel 21 is less than 90mm for being greater than 50mm, this scope both can guarantee that one-way superimposed sheet main part 1 is stable by the support, can guarantee certain fault-tolerant space again, still guarantee simultaneously that prefabricated one-way superimposed sheet main part 1 can not the landing in this scope.
Referring to fig. 4, the prefabricated unidirectional composite slab main body 1 further comprises a plurality of stressed steel bars 13, the stressed steel bars 13 are uniformly distributed and embedded in the prefabricated concrete layer 11 along the width direction of the prefabricated concrete layer 11, and the stressed steel bars 13 penetrate through the length direction of the prefabricated concrete layer 11 in parallel; the prefabricated unidirectional composite slab main body 1 further comprises a plurality of distribution steel bars 14, the distribution steel bars 14 are uniformly distributed and embedded in the prefabricated concrete layer 11 along the length direction of the prefabricated concrete layer 11, and the distribution steel bars 14 penetrate through the width direction of the prefabricated concrete layer 11 in parallel; the lower chord ribs 122 and the stressed reinforcing steel bars 13 are arranged at intervals along the width direction of the precast concrete layer 11, the stressed reinforcing steel bars 13 and the lower chord ribs 122 are located on the same horizontal plane, the lower chord ribs 122 are used as the stressed reinforcing steel bars 13 at the same time, and are arranged at intervals, so that the bending rigidity and the bearing capacity of the precast one-way composite slab main body are improved, the stress balance of the precast one-way composite slab main body is realized, and the strength balance of the precast one-way composite slab main body is ensured.
A construction method of a support-free prefabricated one-way composite slab with a limiting device comprises the following steps:
s1, processing a prefabricated one-way laminated slab main body 1:
s1a, cleaning a template of the prefabricated unidirectional composite slab main body 1, and preparing a steel bar for processing;
s1b, binding bottom layer stress steel bars 13 and distribution steel bars 14;
s1c, binding a steel bar truss 12;
s1d, pouring concrete;
s1e, maintaining;
s1f, demolding the prefabricated unidirectional composite slab main body 1;
s2, constructing a limiting device 2:
s2a, processing a steel beam 21 according to the length required by a drawing;
s2b, preparing materials required by processing the limiting piece 22;
s2c, welding the limiting piece 22 to the upper surface of the steel beam 21;
s2d, spraying anticorrosive paint;
s3, the support-free prefabricated one-way laminated slab is installed:
s3a, transporting the prefabricated unidirectional composite slab main body 1 and the limiting device 2 to a construction site;
s3b, hoisting the limiting device 2 to a preset position;
s3c, hoisting the prefabricated unidirectional composite slab main body 1 to a preset position, and limiting the installation position by the limiting device 2;
s3d, binding stress steel bars at the top of the floor slab;
s3e, pouring concrete;
s3f, construction and maintenance.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may apply the above-mentioned technical details to other fields by using the equivalent embodiments with equivalent changes or modifications, but any simple modification and equivalent changes made to the above embodiments according to the technical spirit of the present invention may still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A support-free prefabricated one-way composite slab with a limiting device is characterized by comprising a prefabricated one-way composite slab main body (1) and the limiting device (2); prefabricated one-way superimposed sheet main part (1) includes precast concrete layer (11) and a plurality of steel bar truss (12) that set up along precast concrete layer (11) width direction interval, stop device (2) set up at the ascending both ends of prefabricated one-way superimposed sheet main part (1) length direction, with support and restriction prefabricated one-way superimposed sheet main part (1) is located preset position.
2. The support-free prefabricated unidirectional composite slab with the limiting device as claimed in claim 1, it is characterized in that the steel bar truss (12) comprises two upper chord bars (121) which are arranged in parallel, two lower chord bars (122) which are arranged in parallel and a web bar (123), the two lower chord tendons (122) are pre-buried in the precast concrete layer (11) and penetrate through the length direction of the precast concrete layer (11), the two upper chord ribs (121) are arranged above the precast concrete layer (11), the cross sections of the two upper chord ribs (121) and the two lower chord ribs (122) form a quadrangle, the web ribs (123) are fixedly connected with the two upper chord ribs (121) and the two lower chord ribs (122) along the cross section, the web ribs (123) are of a quadrilateral frame structure with an opening at the lower end, and a plurality of web ribs (123) are uniformly distributed along the length directions of the upper chord rib (121) and the lower chord rib (122).
3. The support-free prefabricated one-way composite slab with the limiting device as claimed in claim 2, wherein the limiting device (2) comprises a steel beam (21) and limiting parts (22) uniformly welded on the upper surface of the steel beam (21), the prefabricated one-way composite slab main body (1) is placed on the upper surface of the steel beam (21), the horizontal displacement of the prefabricated one-way composite slab main body (1) along the length direction is limited by the limiting parts (22), and the prefabricated one-way composite slab main body (1) is fixed with the limiting device (2) through cast-in-place concrete after reaching a preset position.
4. The support-free prefabricated unidirectional composite slab with the limiting device as claimed in claim 3, wherein the prefabricated unidirectional composite slab main body (1) further comprises a plurality of stress steel bars (13), the stress steel bars (13) are uniformly distributed and embedded in the prefabricated concrete layer (11) along the width direction of the prefabricated concrete layer (11), and the stress steel bars (13) parallelly penetrate through the length direction of the prefabricated concrete layer (11).
5. The support-free prefabricated one-way composite slab with the limiting device as claimed in claim 4, wherein the prefabricated one-way composite slab main body (1) further comprises a plurality of distribution steel bars (14), the distribution steel bars (14) are uniformly distributed and embedded in the prefabricated concrete layer (11) along the length direction of the prefabricated concrete layer (11), and the distribution steel bars (14) penetrate through the width direction of the prefabricated concrete layer (11) in parallel.
6. The support-free prefabricated unidirectional composite slab with the limiting device as claimed in claim 5, wherein the lower chord ribs (122) and the stressed steel bars (13) are arranged at intervals along the width direction of the prefabricated concrete layer (11).
7. The construction method of the support-free prefabricated one-way composite slab with the limiting device is characterized by comprising the following steps of:
s1, processing a prefabricated one-way laminated slab main body (1);
s2, constructing the limiting device (2);
and S3, mounting the support-free prefabricated unidirectional laminated slab.
8. The construction method of the support-free prefabricated unidirectional composite slab with the limiting device as claimed in claim 7, wherein the step S1 comprises the steps of:
s1a, cleaning a template of the prefabricated unidirectional composite slab main body (1) and preparing for processing used reinforcing steel bars;
s1b, binding bottom layer stress steel bars (13) and distribution steel bars (14);
s1c, binding a steel bar truss (12);
s1d, pouring concrete;
s1e, maintaining;
s1f, demolding the prefabricated unidirectional composite slab main body (1).
9. The construction method of the support-free precast uni-directional composite slab with the position limiting device as claimed in claim 8, wherein the S2 comprises the steps of:
s2a, processing a steel beam (21) according to the length required by a drawing;
s2b, preparing materials required by processing the limiting piece (22);
s2c, welding the limiting piece (22) to the upper surface of the steel beam (21);
s2d, spraying anticorrosive paint.
10. The construction method of the support-free prefabricated unidirectional composite slab with the limiting device as claimed in claim 9, wherein the step of S3 comprises the steps of:
s3, transporting the prefabricated unidirectional composite slab main body (1) and the limiting device (2) to a construction site;
s3b, hoisting the limiting device (2) to a preset position;
s3c, hoisting the prefabricated unidirectional laminated slab main body (1) to a preset position, and limiting the installation position by using a limiting device (2);
s3d, binding stress steel bars at the top of the floor slab;
s3e, pouring concrete;
s3f, construction and maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165708.7A CN114319675A (en) | 2022-02-23 | 2022-02-23 | Support-free prefabricated one-way laminated slab with limiting device and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165708.7A CN114319675A (en) | 2022-02-23 | 2022-02-23 | Support-free prefabricated one-way laminated slab with limiting device and construction method |
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| CN114319675A true CN114319675A (en) | 2022-04-12 |
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| CN202210165708.7A Pending CN114319675A (en) | 2022-02-23 | 2022-02-23 | Support-free prefabricated one-way laminated slab with limiting device and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468625A (en) * | 2023-12-13 | 2024-01-30 | 安徽金鹏绿色建筑产业集团有限公司 | A support-free prestressed composite panel connection node |
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Application publication date: 20220412 |