CN113356430A - Construction method of dense rib plate floor - Google Patents
Construction method of dense rib plate floor Download PDFInfo
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- CN113356430A CN113356430A CN202110728614.1A CN202110728614A CN113356430A CN 113356430 A CN113356430 A CN 113356430A CN 202110728614 A CN202110728614 A CN 202110728614A CN 113356430 A CN113356430 A CN 113356430A
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- trapezoidal
- supporting
- supporting plate
- construction method
- dense rib
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/40—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings for coffered or ribbed ceilings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/40—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings for coffered or ribbed ceilings
- E04G11/46—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings for coffered or ribbed ceilings of hat-like or trough-like shape encasing a rib or the section between two ribs or encasing one rib and its adjacent flat floor or ceiling section
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention relates to the field of building construction, in particular to a construction method of a dense rib plate floor, which comprises the following steps: the method comprises the following steps: erecting a scaffold; step two: mounting a support plate; step three: placing a trapezoidal mold; step four: binding reinforcing steel bars above the trapezoidal molds and between two adjacent trapezoidal molds; step five: pouring concrete at the position where the reinforcing steel bars are bound and curing until the concrete is solidified; step six: and dismantling the scaffold, the support plate and the trapezoidal mold. When adopting this technical scheme, be favorable to improving the roughness of the dense floor system lower surface after the shaping, be favorable to prolonging the life of mould simultaneously, can also fix a position the installation of mould to improve the installation accuracy of mould and reduce the installation time of mould.
Description
Technical Field
The invention relates to the field of building construction, in particular to a construction method of a dense rib plate floor.
Background
In the building with larger span, dense rib plate floor systems are increasingly used to reduce inner columns, so that the effective space of the building is greatly increased, and the floor height is correspondingly reduced.
The cast-in-place ribbed structure has good integrity, large rigidity and strong shock resistance, and the appearance is attractive and novel after demoulding, so that plastering and ceiling hanging procedures can be omitted, post-treatment is also convenient, each algae well below the floor can play a role in sound absorption, and simultaneously compared with a common simply supported beam frame structure system, the cast-in-place ribbed structure can effectively save 30-50% of concrete under the same condition, greatly reduce the dead weight of the floor and improve the bearing capacity.
In the process of dense ribbed slab floor construction, the support plate is supported through the scaffold, then the edges of the plastic molds are fixed on the support plate through iron nails, concrete pouring is carried out after reinforcing steel bars are laid above the adjacent plastic molds and the plastic molds, and after the concrete is solidified, the support plate and the plastic molds are disassembled, so that the plastic molds can be disassembled from the support plate.
However, the construction of the prior dense rib plate floor has the following problems: 1. because the edges of the plastic molds protrude, the edges of the adjacent plastic molds are not completely contacted, and the lower surface of the dense rib plate floor is uneven after the concrete is molded; 2. in the process of detaching the plastic mold from the support plate, the plastic mold is formed by compression molding of plastic, so that the plastic mold can be damaged by a detaching tool in the process of repeated use; 3. because the algae wells under the floor are required to be regularly distributed, the installation position needs to be measured and determined in the process of installing the plastic mould, the process is complex, and the working hours are wasted.
Disclosure of Invention
The invention aims to provide a construction method of a dense rib plate floor, which is beneficial to improving the flatness of the lower surface of the formed dense rib plate floor, prolonging the service life of a mold, and positioning the installation of the mold so as to improve the installation precision of the mold and reduce the installation time of the mold.
In order to achieve the aim, the technical scheme of the invention provides a construction method of a dense rib plate floor, which comprises the following steps:
the method comprises the following steps: erecting a scaffold;
step two: installing support plates on the scaffold to enable the adjacent support plates to be in contact with each other;
step three: placing a trapezoidal die: firstly, preparing a plurality of trapezoidal dies, fixing blocks and connecting pieces, wherein the fixing blocks are in a cross shape and comprise four fixing strips, and the cross sections of the fixing strips are in a T shape; then, firstly, placing four trapezoidal molds on a supporting plate, then placing a fixing block between the four trapezoidal molds, enabling the side walls of the fixing strips to be in contact with the side walls of two adjacent trapezoidal molds, then connecting the fixing block and the supporting plate through a connecting piece, and pressing and fixing the edges of the trapezoidal molds through the fixing strips until the trapezoidal molds are placed completely;
step four: binding reinforcing steel bars above the trapezoidal molds and between two adjacent trapezoidal molds;
step five: pouring concrete at the position where the reinforcing steel bars are bound and curing until the concrete is solidified;
step six: and dismantling the scaffold, the support plate and the trapezoidal mold.
The technical effect of the scheme is as follows: after four trapezoidal dies are placed on the supporting plate, the fixing block is placed between the four trapezoidal dies, the side wall of the fixing strip is in contact with the side walls of the two adjacent trapezoidal dies, then the fixing block and the supporting plate are connected through the connecting piece, the edge of the trapezoidal die is pressed and fixed through the fixing strip, and the trapezoidal die is connected with the supporting plate.
The trapezoidal die is pressed fixedly through the fixing block, the positioning of the trapezoidal die placing position can be realized, the first trapezoidal die is placed in place, other trapezoidal dies do not need to be determined in advance and placed in place, the fixing block and the supporting plate are connected, the trapezoidal die is placed and adjusted, and the time for installing the trapezoidal die is shortened while the installation precision of the trapezoidal die is improved.
After the construction templates are installed, concrete is poured between the adjacent trapezoid molds and above the trapezoid molds, after the concrete is solidified and the construction templates are removed, the lower surface of the dense rib plate floor is the surface which is in contact with the fixing block, and therefore the flatness of the lower surface of the dense rib plate floor is high; when dismantling the fixed block from the backup pad simultaneously, extracting tool can not contact with trapezoidal mould, is favorable to reducing the damage to trapezoidal mould, is favorable to improving the life of trapezoidal mould.
Furthermore, in the third step, the connecting piece is an iron nail, and the iron nail is positioned on one side of the fixing block. The technical effect of the scheme is as follows: avoid the iron nail to get into two backup pads splice position departments and lead to the iron nail to loosen easily and take off.
Furthermore, the connection position of each iron nail and the fixing block is consistent. The technical effect of the scheme is as follows: the quantity of the iron nails on each supporting plate is consistent when the iron nails are detached, and the iron nails are prevented from being pulled out.
And further, filling the trapezoidal mold with a foaming agent before the trapezoidal mold is placed in the third step. The technical effect of the scheme is as follows: and the slurry leakage in the concrete pouring process is avoided.
And furthermore, after the trapezoidal die is placed in the step three, a release agent is brushed on the outer side wall of the trapezoidal die. The technical effect of the scheme is as follows: facilitating the demoulding of the subsequent trapezoid mould.
Further, leveling and paying off operations are carried out before the scaffold is erected in the first step: and adding wood cushion blocks on the flat and solid ground for supporting the scaffold. The technical effect of the scheme is as follows: the scaffold is ensured not to be settled in the concrete pouring process.
And furthermore, a pull ring is arranged on the supporting plate in the second step. The technical effect of the scheme is as follows: the L-shaped steel bars and the like can penetrate into the pull ring to apply force downwards to remove the form.
Further, step two one side of backup pad is equipped with the breach, and breach department is fixed with the bracing piece, and this side of backup pad is equipped with the counter bore, and it is provided with T type pole to slide in the counter bore, and the opposite side of backup pad is equipped with the supporting shoe, and after adjacent backup pad contacted, the supporting shoe was located the breach, and was equipped with the arc wall that can match with the bracing piece on the supporting shoe, and the backup pad was equipped with one side of supporting shoe and can promote T type pole and remove. The technical effect of the scheme is as follows: this scheme can reach and be favorable to improving the technological effect unexpected that dismantles the fixed block from the backup pad after form removal security, the form removal of being convenient for simultaneously, be favorable to improving the surface smoothness under the dense floor superstructure moreover. Specifically, when the supporting plates are sequentially dismounted from one side, one supporting plate slides downwards relative to the adjacent supporting plate, the supporting block slides in the gap in the process, after the supporting rod is positioned in the arc-shaped groove, the trapezoidal die and the supporting plate are demolded, the supporting plate rotates around the supporting rod, the supporting plate cannot directly fall onto the ground, the supporting plate can be prevented from being hit on a constructor, construction safety is improved, and the adjacent supporting plate is driven to move downwards under the action of gravity and inertia when the supporting plate rotates to the limit position; the supporting plate is contacted with the T-shaped rod before rotating to the limit position and pushes the T-shaped rod to move upwards in the countersunk hole, so that an upward thrust is applied to the fixed block, a gap is further generated between the fixed block and the supporting plate, namely, the iron nail between the fixed block and the supporting plate is exposed, after the supporting plate and the trapezoidal die are demolded, a tool is conveniently extended into the gap, the fixed block is pried and removed from the supporting plate after force is applied, and then the iron nail is knocked by a hammer and the like to withdraw from the fixed block, and the fixed block and the iron nail at the splicing position of the adjacent supporting plates are conveniently dismantled; the fixed block is convenient to detach from the supporting plate, and meanwhile, under the condition that the iron nails are convenient to detach, the heads of the iron nails can be completely embedded into the fixed block when the fixed block and the supporting plate are connected, so that the flatness of the upper surface of the fixed block is improved, and the construction flatness of the lower surface of the floor slab with the dense rib plates is guaranteed.
Furthermore, the free end of the T-shaped rod is an inclined plane, and one side of the supporting plate, which is provided with the supporting block, can be in contact with the inclined plane. The technical effect of the scheme is as follows: the support plate convenient to rotate smoothly pushes the T-shaped rod to move.
Furthermore, an annular cavity is arranged in the supporting plate, the counter bore penetrates through the annular cavity, and a spring is sleeved on the T-shaped rod and is located in the annular cavity. The technical effect of the scheme is as follows: the T-shaped rod is prevented from falling from the countersunk hole when the supporting plate is inverted.
Drawings
FIG. 1 is a front cross-sectional view of an embodiment of the present invention;
FIG. 2 is a top view of an embodiment of the present invention;
FIG. 3 is a schematic view of the present invention when demolded (notches, counter bores, T-bars, etc. not shown);
FIG. 4 is a three-dimensional schematic view of two support plates when they are joined together;
FIG. 5 is an exploded view of two support plates;
FIG. 6 is a three-dimensional schematic view of two support plates when the mold is removed;
FIG. 7 is a three-dimensional schematic view of a T-bar.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a supporting plate 1, a trapezoidal die 2, a fixing block 3, an iron nail 4, a cavity 5, an edge 6, a fixing strip 7, a pull ring 8, a notch 9, a supporting rod 10, a counter bore 11, a T-shaped rod 12, a supporting block 13 and an arc-shaped groove 14.
The first embodiment is as follows:
a construction method of a dense rib plate floor comprises the following steps:
the method comprises the following steps: the construction personnel firstly carry out leveling and paying-off operations, namely, wood cushion blocks are placed on the flat and solid ground, then the scaffold is erected, and the wood cushion blocks are used for supporting the scaffold.
Step two: mounting the supporting plates 1 shown in figures 1 and 2 on the scaffold, and enabling the side walls of the adjacent supporting plates 1 to be mutually contacted; as shown in fig. 2, four support plates 1 are shown in this embodiment for illustration, and the four support plates 1 are assembled together and supported by a scaffold.
Step three: placing a trapezoidal die: firstly, preparing a plurality of trapezoidal dies 2, fixed blocks 3 and connecting pieces; as shown in fig. 1, a cavity 5 is formed on the trapezoidal mold 2, the trapezoidal mold 2 is made of plastic, and an edge 6 of the trapezoidal mold 2 is turned outwards; as shown in fig. 2, the fixing block 3 is in a cross shape, and as shown in fig. 2, the fixing block 3 includes four fixing strips 7, and the four fixing strips 7 are integrally formed; as shown in fig. 1, the cross section of the fixing strip 7 is "T" shaped. Fixed block 3 and backup pad 1 are made by plastics, and the connecting piece is iron nail 4.
Then, a constructor carries out position determination on one of the trapezoidal molds 2, for example, the trapezoidal mold 2 at the lower left corner of fig. 2, then additionally places three trapezoidal molds 2 around the trapezoidal mold 2 at the determined position, so that two fixing strips 7 of the fixing block 3 are in contact with the outer side wall of the trapezoidal mold 2 at the determined position, adjusts the positions of the other three trapezoidal molds 2 so that the fixing strips 7 are in contact with the outer side wall of the trapezoidal mold 2, then fixes the fixing block 3 on the supporting plate 1 through iron nails 4, and realizes the fixation of the trapezoidal mold 2 through the pressing of the fixing strips 7 on the edge 6 of the trapezoidal mold 2; then place trapezoidal mould 2 in proper order on backup pad 1, adjust trapezoidal mould 2's position according to fixed block 3 back through iron nail 4 and fixed block 3 with trapezoidal mould 2 fixed mounting in backup pad 1, until trapezoidal mould 2 lays and finishes. Wherein, the trapezoidal mould 2 is filled with foaming agent before the trapezoidal mould 2 is arranged, and the demoulding agent is brushed on the outer side wall of the trapezoidal mould 2 after the trapezoidal mould 2 is arranged.
The iron nail 4 is in the position shown in figure 2; as shown in fig. 1, the iron nails 4 are located on the left side of the fixed block 3, that is, the iron nails 4 are not driven from the center of the fixed block 3, and the connection position of each iron nail 4 is consistent with that of the fixed block 3; where the cross-sectional position of the nail 4 in fig. 1 is not visible, the nail 4 is shown in fig. 1 for the sake of convenience in indicating the position of the nail 4.
Step four: and steel bars are bound above the trapezoidal molds 2 and between two adjacent trapezoidal molds 2.
Step five: pouring concrete at the position where the reinforcing steel bars are bound and curing until the concrete is solidified; the schematic diagram of the dense rib floor after solidification and forming is shown in figure 3.
Step six: the scaffolding is dismantled together with the support plate 1 and the trapezoidal mould 2.
Example two:
on the basis of the first embodiment, as shown in fig. 3, the supporting plate 1 is welded with pull rings 8 (only one pull ring 8 is shown). As shown in fig. 4 and 5, a notch 9 is formed in one side of the support plate 1, a support rod 10 is welded at the notch 9, a counter bore 11 is formed in the side of the support plate 1, a T-shaped rod 12 shown in fig. 7 is slidably disposed in the counter bore 11, and the lower end of the T-shaped rod 12 is an inclined surface. The position of the T-shaped rod 12 is located in the region R in fig. 2, and does not coincide with the position of the iron nail 4.
The supporting blocks 13 are welded on the other sides of the supporting plates 1, after the adjacent supporting plates 1 are contacted, the supporting blocks 13 are positioned in the notches 9, and arc-shaped grooves 14 are formed in the supporting blocks 13; in the state shown in fig. 6, the support bar 10 is located in the arc-shaped groove 14; and in the process of changing the state of fig. 4 to the state of fig. 6, one side of the support plate 1 welded with the support block 13 can be contacted with the inclined surface and push the T-bar 12 to move upward.
In addition, an annular cavity is formed in the supporting plate 1, the counter bore 11 penetrates through the annular cavity, a spring is sleeved on the T-shaped rod 12 and is located in the annular cavity, one end of the spring is welded with the bottom of the annular cavity, and the other end of the spring is welded with the T-shaped rod 12.
When the supporting plate 1 is installed in the second step, the supporting block 13 on the supporting plate 1 is embedded into the notch 9 of the adjacent supporting plate 1, in the process of removing the supporting plate 1 and the trapezoidal mold 2 in the sixth step, namely in the process of sequentially removing the supporting plate 1 from the right side to the left side in fig. 3, the supporting plate 1 on the right side slides downwards relative to the supporting plate 1 on the left side, in the process, the supporting block 13 shown in fig. 5 slides downwards in the notch 9, after the supporting rod 10 is positioned in the arc-shaped groove 14, the trapezoidal mold 2 and the supporting plate 1 are demolded, the supporting plate 1 on the right side rotates around the supporting rod 10, as shown in fig. 3 and 6, the supporting plate 1 on the right side cannot directly fall off the ground, the supporting plate 1 can be prevented from being smashed on the body of constructors, and construction safety is improved.
When the right support plate 1 rotates to the limit position, the left support plate 1 in the image 3 is driven to move downwards under the action of gravity and inertia; because T type pole 12 surpasss the lower surface of backup pad 1, backup pad 1 rotates before the extreme position with T type pole 12 contact, and promote T type pole 12 rebound in counter bore 11, thereby apply for 3 in fig. 3 fixed block 3 (or fixed strip 7, because fixed block 3 includes four fixed strip 7) an ascending thrust, and then make and produce the clearance between fixed block 3 and the backup pad 1, even make iron nail 4 between fixed block 3 and the backup pad 1 expose, after backup pad 1 and the 2 mould stripping of trapezoidal mould be convenient for stretch into the clearance with the instrument and the application of force after with fixed block 3 from the backup pad 1 prize, strike iron nail 4 through the hammer etc. and make it withdraw from fixed block 3.
Convenient follow backup pad 1 at fixed block 3 and demolish, under the circumstances of convenient to detach iron nail 4 simultaneously, can make in iron nail 4's head imbeds fixed block 3 completely when connecting fixed block 3 and backup pad 1, so be favorable to improving the roughness of fixed block 3 upper surface, and then guarantee the construction roughness of dense floor system lower surface.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (10)
1. A construction method of a dense rib plate floor is characterized in that: the method comprises the following steps:
the method comprises the following steps: erecting a scaffold;
step two: installing support plates on the scaffold to enable the adjacent support plates to be in contact with each other;
step three: placing a trapezoidal die: firstly, preparing a plurality of trapezoidal dies, fixing blocks and connecting pieces, wherein the fixing blocks are in a cross shape and comprise four fixing strips, and the cross sections of the fixing strips are in a T shape; then, firstly, placing four trapezoidal molds on a supporting plate, then placing a fixing block between the four trapezoidal molds, enabling the side walls of the fixing strips to be in contact with the side walls of two adjacent trapezoidal molds, then connecting the fixing block and the supporting plate through a connecting piece, and pressing and fixing the edges of the trapezoidal molds through the fixing strips until the trapezoidal molds are placed completely;
step four: binding reinforcing steel bars above the trapezoidal molds and between two adjacent trapezoidal molds;
step five: pouring concrete at the position where the reinforcing steel bars are bound and curing until the concrete is solidified;
step six: and dismantling the scaffold, the support plate and the trapezoidal mold.
2. The construction method of a dense rib floor as claimed in claim 1, wherein: and in the third step, the connecting piece is an iron nail which is positioned at one side of the fixed block.
3. The construction method of a dense rib floor as claimed in claim 2, wherein: the connection position of each iron nail and the fixed block is consistent.
4. The construction method of a dense rib floor as claimed in claim 3, wherein: and step three, filling the trapezoidal mold with a foaming agent before the trapezoidal mold is placed.
5. The construction method of a dense rib floor as claimed in claim 4, wherein: and thirdly, brushing a release agent on the outer side wall of the trapezoidal mold after the trapezoidal mold is placed.
6. The construction method of a dense rib floor as claimed in claim 5, wherein: firstly, leveling and paying off operations are carried out before a scaffold is erected: and adding wood cushion blocks on the flat and solid ground for supporting the scaffold.
7. The construction method of a dense rib floor as claimed in claim 6, wherein: and step two, pull rings are arranged on the supporting plates.
8. The method for constructing a dense rib floor as claimed in any one of claims 1 or 7, wherein: step two, a notch is formed in one side of the supporting plate, a supporting rod is fixed at the notch, a counter bore is formed in the side of the supporting plate, a T-shaped rod is arranged in the counter bore in a sliding mode, a supporting block is arranged on the other side of the supporting plate, after the adjacent supporting plates are contacted, the supporting block is located in the notch, an arc-shaped groove capable of being matched with the supporting rod is formed in the supporting block, and the T-shaped rod can be pushed to move by the side, provided with the supporting block, of the supporting plate.
9. The construction method of a dense rib floor as claimed in claim 8, wherein: the free end of the T-shaped rod is an inclined plane, and one side of the supporting plate, which is provided with the supporting block, can be contacted with the inclined plane.
10. The construction method of a dense rib floor as claimed in claim 9, wherein: an annular cavity is arranged in the supporting plate, a counter bore penetrates through the annular cavity, a spring is sleeved on the T-shaped rod, and the spring is located in the annular cavity.
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| CN202110728614.1A CN113356430B (en) | 2021-06-29 | 2021-06-29 | Construction method of dense rib plate floor |
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| CN202110728614.1A CN113356430B (en) | 2021-06-29 | 2021-06-29 | Construction method of dense rib plate floor |
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| CN113356430B (en) | 2023-01-17 |
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