CN113235415A - Bridge floor connecting device - Google Patents
Bridge floor connecting device Download PDFInfo
- Publication number
- CN113235415A CN113235415A CN202110461371.XA CN202110461371A CN113235415A CN 113235415 A CN113235415 A CN 113235415A CN 202110461371 A CN202110461371 A CN 202110461371A CN 113235415 A CN113235415 A CN 113235415A
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- box
- displacement
- bridge
- plate
- cross beam
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 62
- 229910001220 stainless steel Inorganic materials 0.000 claims description 16
- 239000010935 stainless steel Substances 0.000 claims description 16
- 239000002390 adhesive tape Substances 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 description 9
- 230000008602 contraction Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 5
- 241000274582 Pycnanthus angolensis Species 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/062—Joints having intermediate beams
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a bridge deck connecting device, and belongs to the technical field of bridge deck connection. Comprises a fixed box, a displacement box, a middle beam and a cross beam; a first rotating device is arranged in the fixed box, a second rotating device is arranged in the displacement box, the cross beam is connected between the first rotating device and the second rotating device, and the middle beam is arranged on the cross beam; the two ends of the cross beam are respectively arranged in the fixed box and the displacement box, and can generate displacement along the bridge direction or the transverse bridge direction. The invention effectively solves the problems of relative displacement and high-differential rotation change between bridges caused by temperature deformation.
Description
Technical Field
The invention relates to a bridge deck connecting device, which is mainly applied to bridge deck connection between beams in bridge engineering and belongs to the technical field of bridge deck connection.
Background
The expansion with heat and contraction with cold are basic properties of an object, and the object expands after being heated and contracts under the condition of being cooled under a normal state. All substances have this property. In the operation process of the bridge, the expansion caused by heat and the contraction caused by cold due to temperature change, the deflection deformation caused by load bearing and other factors can cause the displacement between the two beams along the bridge direction and the transverse bridge direction, and the vertical height difference between the two beams. The displacement along the bridge direction and the transverse bridge direction and the vertical height difference between the beams easily cause the fracture and the bulge of the bridge. Especially, at the joint of the new bridge and the old bridge, the driving is inconvenient and the safety is threatened because the height difference is easily caused by the driving interval. Therefore, the invention is needed to provide a bridge connecting device which can not only follow the displacement of the bridge along the bridge direction and the transverse bridge direction, but also avoid the vertical height difference.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a bridge deck connecting device which can realize displacement along the bridge direction and the transverse bridge direction and vertical rotation, so that the device adapts to relative change between two beams and solves the problems of temperature deformation and height difference change.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bridge deck connecting device comprises a fixed box, a displacement box, a middle beam and a cross beam; a first rotating device is arranged in the fixed box, a second rotating device is arranged in the displacement box, the cross beam is connected between the first rotating device and the second rotating device, and the middle beam is arranged on the cross beam; two ends of the cross beam are respectively arranged in the fixed box and the displacement box and can generate displacement along the bridge direction or the transverse bridge direction;
the first rotating device comprises a spherical base, a spherical sliding plate and a spherical crown lining plate which are symmetrically arranged from outside to inside in sequence; the spherical sliding plate is clamped between the spherical base and the spherical cap lining plate; the spherical crown lining plate and the cross beam are integrally connected;
a second rotating device is arranged in the displacement box and comprises a cylindrical surface base, a cylindrical surface sliding plate and a cylindrical surface lining plate which are symmetrically arranged from outside to inside in sequence; the cross beam is arranged between the upper cylindrical surface lining plate and the lower cylindrical surface lining plate;
a friction pair is arranged between the cross beam and the cylindrical surface lining plate;
the friction pair consists of a plane sliding plate and a stainless steel plate; the plane sliding plate is arranged in a groove on the bottom surface of the cylindrical lining plate; the stainless steel plates are arranged on the upper surface and the lower surface of the cross beam.
Further, the cross beam can generate displacement along the bridge direction and the transverse bridge direction between the friction pairs; when the bridge is subjected to telescopic displacement due to expansion and contraction and bearing reasons, the plane sliding plate and the stainless steel plate in the friction pair slide correspondingly, so that the cross beam can slide along the bridge direction and slide along the transverse bridge direction in the displacement box, and meanwhile, the cross beam can rotate in the fixed box and the displacement box through the first rotating device and/or the second rotating device to adapt to the vertical height difference of the left end and the right end of the cross beam.
Or alternatively, the fixed box is replaced by the displacement box, namely, the left end and the right end of the cross beam are both arranged in the displacement box.
Furthermore, both ends of the cross beam extend outwards and are provided with blocking devices at the end parts, and design reserve is arranged between the blocking devices and the cylindrical surface lining plates.
Furthermore, edge beams are arranged on two sides of the middle beam, the edge beams are respectively and fixedly arranged at the top ends of the fixed box and/or the displacement box, and expansion joints are arranged between the middle beam and the edge beams; an adhesive tape is further arranged in the expansion joint between the middle beam and the boundary beam, and two ends of the adhesive tape are respectively arranged in the expansion grooves of the middle beam and the boundary beam.
Or U-shaped stainless steel plates are arranged between the middle beam and the fixed boxes and the displacement boxes on the two sides, and elastomers are filled in the U-shaped stainless steel plates and in expansion joints among the groups of middle beams.
Furthermore, the middle beams are arranged in a plurality of groups in the transverse bridge direction; the cross beams are arranged along the bridge direction.
Furthermore, the fixed box and/or the displacement box further comprise U-shaped box plates arranged on the outer sides, each U-shaped box plate comprises an upper plate, a lower plate and side plates, a certain distance is arranged between each side plate and each end of the cross beam, and the upper plate and the lower plate are respectively connected with the spherical base and/or the cylindrical base.
Further, the fixed boxes and/or the displacement boxes at the two ends of the cross beam are respectively arranged in the concrete bridge surfaces at the left side and the right side.
Furthermore, adhesive tapes are arranged between the concrete bridge decks on the two sides of the bottom of the bridge deck connecting device. In particular, the strip is a rubber sheet manufactured in advance for waterproofing.
Further, the length of the stainless steel plate is greater than that of the plane sliding plate.
Compared with the prior art, the invention can obtain the following technical effects:
the connecting device of the invention can not only follow the displacement of the bridge along the bridge direction and the transverse bridge direction, but also avoid the vertical height difference, and effectively solves the relative displacement and the height difference rotation change caused by temperature deformation. When the bridge is subjected to telescopic displacement due to expansion with heat and contraction with cold, bearing and the like, the friction by-product slides correspondingly, so that the cross beam slides along the bridge direction and slides along the transverse bridge direction in the displacement box, and meanwhile, the cross beam can rotate in the fixed box and the displacement box through the rotating device to adapt to the vertical height difference of the two beams, so that the bridge has a wide application prospect.
Drawings
FIG. 1 is a side view of a first deck connection assembly according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a side view of a second deck connection assembly according to the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a side view of a third deck connection according to the present invention;
FIG. 6 is a head distortion view of FIG. 5;
FIG. 7 is a side view of a fourth deck connection according to the present invention;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is a side view of a fifth deck attachment of the present invention;
fig. 10 is a top view of fig. 9.
Detailed Description
The invention is further illustrated with reference to fig. 1-10.
Example 1
As shown in fig. 1-2, a bridge deck connecting device of the present invention includes a fixed box 1, a displacement box 2, a center sill 3, and a cross member 4. A first rotating device 11 is arranged in the fixed box 1, a second rotating device 21 is arranged in the displacement box 2, a cross beam 4 is connected between the first rotating device 11 and the second rotating device 21, and a middle beam 3 is arranged on the cross beam 4. The two ends of the beam 4 are respectively arranged in the fixed box 1 and the displacement box 2, and can generate displacement along the bridge direction or the transverse bridge direction. The first rotating device 11 comprises a spherical base 111, a spherical sliding plate 112 and a spherical cap lining plate 113 which are symmetrically arranged from outside to inside in sequence. The spherical sliding plate 112 is sandwiched between the spherical base 111 and the spherical cap liner plate 113. The spherical cap liner plate 113 is integrally connected with the cross beam 4. The second rotating device 21 is arranged in the displacement box 2, and the second rotating device 21 comprises a cylindrical surface base 211, a cylindrical surface sliding plate 212 and a cylindrical surface lining plate 213 which are symmetrically arranged from outside to inside in sequence. A cross beam 4 is arranged between the upper cylindrical lining plate 213 and the lower cylindrical lining plate 213. A friction pair is arranged between the cross beam 4 and the cylindrical lining plate 213. The friction pair is composed of a plane sliding plate 2141 and a stainless steel plate 2142. A planar slide 2141 is disposed in a recess in the bottom surface of the cylindrical liner 213. Stainless steel plates 2142 are provided on both upper and lower surfaces of the cross member 4. The stationary box 1 and the displacement box 2 further comprise a U-shaped box plate 100 arranged on the outside. The U-shaped box board 100 is composed of an upper board, a lower board and a side board, the side board is spaced from two ends of the beam 4, and the upper board and the lower board are respectively connected with the spherical base 111 or the cylindrical base 211. In this embodiment, the center sills 3 are 1 set arranged in the transverse bridge direction. The cross beams 4 are 2 groups arranged along the bridge direction. The length of the stainless steel plate 2142 is greater than the length of the planar sliding plate 2141.
Example 2
As shown in fig. 3-4, the bridge deck connecting device of the present invention has the side beams 5 disposed on both sides of the beam 3, the side beams 5 are respectively and fixedly disposed on the top ends of the fixed box 1 and the displacement box 2, and an expansion joint is disposed between the middle beam 3 and the side beams 5. An adhesive tape 6 is further arranged in the expansion joint between the middle beam 3 and the boundary beam 5, and two ends of the adhesive tape 6 are respectively arranged in the expansion grooves 7 of the middle beam 3 and the boundary beam 5. Or the expansion joint can be filled with elastomer. The fixed box 1 and the displacement box 2 at the two ends of the beam 4 are respectively arranged in the concrete bridge deck 200 at the left side and the right side. In this embodiment, the center sills 3 are 2 sets arranged in the transverse bridge direction. The cross beams 4 are 2 groups arranged along the bridge direction. The other structures are the same as those of embodiment 1, and are not described in detail here.
Example 3
As shown in figures 5-6, according to the bridge deck connecting device, the rubber strips 6 are also arranged between the concrete bridge decks on the two sides of the bottom of the bridge deck connecting device, and the rubber strips 6 are rubber sheets manufactured in advance and used for preventing water. The 3 both sides of well roof beam are provided with boundary beam 5, and boundary beam 5 is fixed the setting respectively and is being fixed case 1 and displacement case 2 top, is provided with the expansion joint between well roof beam 3 and the boundary beam 5. The other structures are the same as those of embodiment 1, and are not described in detail here. Fig. 6 shows a deformation diagram when a differential elevation rotation change occurs. The cross beam 4 can generate displacement along the bridge direction and the transverse bridge direction between the friction pairs. When the bridge is subjected to telescopic displacement due to expansion and contraction and bearing reasons, the plane sliding plate 2141 and the stainless steel plate 2142 in the friction pair slide correspondingly, so that the cross beam 4 can slide along the bridge direction and the transverse bridge direction in the displacement box 2, and meanwhile, the cross beam 4 can rotate in the fixed box 1 and the displacement box 2 through the first rotating device 11 and/or the second rotating device 21 to adapt to the vertical height difference of the left end and the right end of the cross beam 4.
Example 4
As shown in fig. 7 to 8, a bridge deck connecting device of the present invention replaces the fixed box 1 of embodiment 1 with the displacement box 2, i.e., the left and right ends of the cross beam 4 are disposed in the displacement box 2. The two ends of the beam 4 extend outwards and are provided with blocking devices 8 at the ends, and a design allowance is arranged between the blocking devices 8 and the cylindrical lining plate 213. Meanwhile, the upper and lower plates of the U-shaped box board 100 are connected to the cylindrical bases 211 at both sides, respectively. The other structures are the same as those of embodiment 1, and are not described in detail here.
Example 5
As shown in fig. 9-10, a deck connecting device according to the present invention has no side beams 5, only center beams 3, and is of a full length. The U-shaped box plate 100 of the fixed box 1 and the outer side of the displacement box 2 are arranged in a whole length, and the specific parts of the first rotating device 11 and the second rotating device 21 in the fixed box are arranged at intervals. In this embodiment, the center sills 3 are 2 sets arranged in the transverse bridge direction. The cross beams 4 are a plurality of groups arranged along the bridge direction. Wherein, all be provided with U type corrosion resistant plate 300 between well roof beam 3 and the fixed case 1 and the displacement case 2 of both sides, fill elastomer 400 in the expansion joint between 2 group well roof beams 3 in the U type corrosion resistant plate 300. The U-shaped stainless steel plate 300 is a flexible thin-walled steel plate and serves to prevent the elastic body 400 from flowing into the first rotating device 11 and the second rotating device 21 in the fixed box 1 and the displacement box 2 during the injection construction, thereby affecting the expansion and contraction performance of the bridge deck connection device. In addition, the elastic body 400 in this embodiment is in a liquid state before construction, and is molded in the space of the expansion joint after construction. Its advantage is guaranteeing that elastomer 400 can effectually fill up the space, if prefabricate elastomer 400 in advance, the space change will not be fine in the work progress fill up the clearance at expansion joint, and this method reduces the required precision of construction, the construction of being convenient for. The other structures are the same as those of embodiment 1, and are not described in detail here.
The above-mentioned embodiments are only given for the purpose of more clearly illustrating the technical solutions of the present invention, and are not meant to be limiting, and variations of the technical solutions of the present invention by those skilled in the art based on the common general knowledge in the art are also within the scope of the present invention.
Claims (10)
1. A bridge deck connecting device is characterized in that: comprises a fixed box (1), a displacement box (2), a middle beam (3) and a cross beam (4); a first rotating device (11) is arranged in the fixed box (1), a second rotating device (21) is arranged in the displacement box (2), the cross beam (4) is connected between the first rotating device (11) and the second rotating device (21), and the middle beam (3) is arranged on the cross beam (4); two ends of the cross beam (4) are respectively arranged in the fixed box (1) and the displacement box (2) and can generate displacement along the bridge direction or the transverse bridge direction;
the first rotating device (11) comprises a spherical base (111), a spherical sliding plate (112) and a spherical crown lining plate (113) which are symmetrically arranged from outside to inside in sequence; the spherical sliding plate (112) is clamped between the spherical base (111) and the spherical cap lining plate (113); the spherical crown lining plate (113) and the cross beam (4) are integrally connected;
a second rotating device (21) is arranged in the displacement box (2), and the second rotating device (21) comprises a cylindrical surface base (211), a cylindrical surface sliding plate (212) and a cylindrical surface lining plate (213) which are symmetrically arranged from outside to inside in sequence; the cross beam (4) is arranged between the upper cylindrical surface lining plate (213) and the lower cylindrical surface lining plate (213);
a friction pair is arranged between the cross beam (4) and the cylindrical surface lining plate (213);
the friction pair consists of a plane sliding plate (2141) and a stainless steel plate (2142); the plane sliding plate (2141) is arranged in a groove on the bottom surface of the cylindrical lining plate (213); the stainless steel plates (2142) are arranged on the upper and lower surfaces of the cross beam (4).
2. A deck connection assembly as claimed in claim 1 wherein: the cross beam (4) can generate displacement along the bridge direction and the transverse bridge direction between the friction pairs; when the bridge is expanded with heat and contracted with cold, when bearing the flexible displacement of reason emergence, plane slide (2141) and corrosion resistant plate (2142) in the friction pair produce corresponding slip, can make crossbeam (4) slide and the horizontal bridge is to sliding along the bridge in displacement box (2), crossbeam (4) can be through first rotating device (11) and/or at second rotating device (21) at fixed case (1) and displacement box (2) rotation simultaneously, adapt to the vertical difference in height of crossbeam (4) left and right-hand member.
3. A deck connection assembly as claimed in claim 1 wherein: the fixed box (1) is replaced by the displacement box (2), namely, the left end and the right end of the cross beam (4) are arranged in the displacement box (2).
4. A deck connection assembly as claimed in claim 3 wherein: the beam (4) is characterized in that two ends of the beam extend outwards and are provided with blocking devices (8) at the ends, and design reserved quantity is arranged between the blocking devices (8) and the cylindrical surface lining plates (213).
5. A bridge deck connection assembly according to any one of claims 1 to 4 wherein: edge beams (5) are arranged on two sides of the middle beam (3), the edge beams (5) are fixedly arranged at the top ends of the fixed box (1) and/or the displacement box (2) respectively, an expansion joint is arranged between the middle beam (3) and the edge beams (5), an adhesive tape (6) is further arranged in the expansion joint between the middle beam (3) and the edge beams (5), and two ends of the adhesive tape (6) are arranged in expansion grooves (7) of the middle beam (3) and the edge beams (5) respectively;
or U-shaped stainless steel plates (300) are arranged between the middle beam (3) and the fixed boxes (1) and the displacement boxes (2) on the two sides, and elastic bodies (400) are filled in the U-shaped stainless steel plates (300) and in expansion joints among the groups of middle beams (3).
6. A bridge deck connection assembly as claimed in claim 5, wherein: the middle beams (3) are arranged in the transverse bridge direction in multiple groups; the cross beams (4) are arranged along the bridge direction.
7. A bridge deck connection assembly as claimed in claim 6, wherein: the fixed box (1) and/or the displacement box (2) further comprise U-shaped box plates (100) arranged on the outer side, each U-shaped box plate is composed of an upper plate, a lower plate and side plates, a certain distance is arranged between each side plate and each end of the cross beam (4), and the upper plate and the lower plate are respectively connected with the spherical base (111) and/or the cylindrical base (211).
8. A bridge deck connection assembly as claimed in claim 7, wherein: and the fixed boxes (1) and/or the displacement boxes (2) at the two ends of the cross beam (4) are respectively arranged in the concrete bridge surfaces at the left side and the right side.
9. A deck connection assembly as claimed in claim 8, wherein: and adhesive tapes (6) are also arranged between the concrete bridge decks on the two sides of the bottom of the bridge deck connecting device.
10. A deck connection assembly as claimed in claim 9 wherein: the length of the stainless steel plate (2142) is greater than that of the planar sliding plate (2141).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110461371.XA CN113235415A (en) | 2021-04-27 | 2021-04-27 | Bridge floor connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110461371.XA CN113235415A (en) | 2021-04-27 | 2021-04-27 | Bridge floor connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113235415A true CN113235415A (en) | 2021-08-10 |
Family
ID=77129837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110461371.XA Pending CN113235415A (en) | 2021-04-27 | 2021-04-27 | Bridge floor connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113235415A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120003542A (en) * | 2010-07-05 | 2012-01-11 | 유니슨이테크 주식회사 | Expansion and contraction jointing device for bridge |
| CN103669203A (en) * | 2013-12-31 | 2014-03-26 | 衡水宝力工程橡胶有限公司 | Modular-pattern comb plate stretching and contracting device |
| CN205188806U (en) * | 2015-11-28 | 2016-04-27 | 河北建业工程橡胶有限公司 | Modulus formula telescoping device |
| CN107217590A (en) * | 2017-06-14 | 2017-09-29 | 武汉海润工程设备有限公司 | A kind of bridge extension joint with volute spring displacement control system |
| CN109024262A (en) * | 2018-10-16 | 2018-12-18 | 长安大学 | A kind of modulus type seamless expansion-contraction devices and its construction method |
| CN109440637A (en) * | 2018-12-19 | 2019-03-08 | 衡水中铁建工程橡胶有限责任公司 | A kind of highway bridge antidetonation telescopic device |
| CN109778691A (en) * | 2019-03-14 | 2019-05-21 | 中铁第四勘察设计院集团有限公司 | Steel bomb physique beam type profile steel bridge expansion device |
| CN110331660A (en) * | 2019-08-21 | 2019-10-15 | 衡水中铁建工程橡胶有限责任公司 | A kind of modulus type bridge expanssion joint with flat pendulum support beam |
| CN210482031U (en) * | 2019-08-21 | 2020-05-08 | 衡水中铁建工程橡胶有限责任公司 | Modulus formula bridge expansion joint with horizontal pendulum supporting beam |
-
2021
- 2021-04-27 CN CN202110461371.XA patent/CN113235415A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120003542A (en) * | 2010-07-05 | 2012-01-11 | 유니슨이테크 주식회사 | Expansion and contraction jointing device for bridge |
| CN103669203A (en) * | 2013-12-31 | 2014-03-26 | 衡水宝力工程橡胶有限公司 | Modular-pattern comb plate stretching and contracting device |
| CN205188806U (en) * | 2015-11-28 | 2016-04-27 | 河北建业工程橡胶有限公司 | Modulus formula telescoping device |
| CN107217590A (en) * | 2017-06-14 | 2017-09-29 | 武汉海润工程设备有限公司 | A kind of bridge extension joint with volute spring displacement control system |
| CN109024262A (en) * | 2018-10-16 | 2018-12-18 | 长安大学 | A kind of modulus type seamless expansion-contraction devices and its construction method |
| CN109440637A (en) * | 2018-12-19 | 2019-03-08 | 衡水中铁建工程橡胶有限责任公司 | A kind of highway bridge antidetonation telescopic device |
| CN109778691A (en) * | 2019-03-14 | 2019-05-21 | 中铁第四勘察设计院集团有限公司 | Steel bomb physique beam type profile steel bridge expansion device |
| CN110331660A (en) * | 2019-08-21 | 2019-10-15 | 衡水中铁建工程橡胶有限责任公司 | A kind of modulus type bridge expanssion joint with flat pendulum support beam |
| CN210482031U (en) * | 2019-08-21 | 2020-05-08 | 衡水中铁建工程橡胶有限责任公司 | Modulus formula bridge expansion joint with horizontal pendulum supporting beam |
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Application publication date: 20210810 |
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