CN102155006A - Steel structure open web combined dam - Google Patents
Steel structure open web combined dam Download PDFInfo
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- CN102155006A CN102155006A CN 201110063410 CN201110063410A CN102155006A CN 102155006 A CN102155006 A CN 102155006A CN 201110063410 CN201110063410 CN 201110063410 CN 201110063410 A CN201110063410 A CN 201110063410A CN 102155006 A CN102155006 A CN 102155006A
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- steel work
- buttress
- dam
- skeleton
- steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 116
- 239000010959 steel Substances 0.000 title claims abstract description 116
- 238000010276 construction Methods 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 210000002784 stomach Anatomy 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 229920002396 Polyurea Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
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Abstract
The invention discloses a steel structure open web combined dam. The steel structure open web combined dam comprises a certain number of concrete buttresses, a concrete bearing platform below the buttresses, and a steel structure panel on the buttresses; a seepage-proofing wall is arranged below the concrete bearing platform; the cross section of the steel structure combined panel is matched with that of each buttress, and is wrapped on the buttresses and two sides of the buttresses; the steel structure combined panel comprises an internal framework and a plurality of unit steel plates which are wrapped on two surfaces of the framework; a splicing gap between adjacent unit steel plates is positioned at the framework; the edges of the unit steel plates are connected to the framework through a fastening piece; and a sealing structure is arranged at the splicing gap between adjacent unit steel plates. In the dam, the steel structure panel is adopted, seepage-proofing capacity is improved, construction is simplified and cost is reduced, and the dam is favorable for environment-friendliness.
Description
Technical field
The present invention relates to the technical field of water resource infrastructure, particularly relate to a kind of steel work combined dam on an empty stomach.
Background technology
The antiseepage body of traditional buttress formula concrete face rockfill dam is made of jointly panel and toe board, panel and toe board all are that concrete constitutes, concrete existence owing to the heat of hydration in work progress causes panel thermal cracking very easily to occur, the existence in crack will cause dam body to produce infiltration, make overall structure produce infiltration and stable problem, large-area concrete slab is in case appearance damages simultaneously, and maintenance and repair is very inconvenient.
Summary of the invention
To the objective of the invention is in order addressing the above problem, a kind of steel work combined dam on an empty stomach to be provided.
Technical scheme of the present invention is: a kind of steel work is combined dam on an empty stomach, contain concrete bearing platform below some concrete buttress, the buttress and the steel work panel on buttress, below concrete bearing platform, be provided with impervious wall, described steel work assembled panel cross section and buttress cross section coupling are coated on above the buttress and both sides; This steel work assembled panel contains inner skeleton and several overlay on two lip-deep unit of skeleton steel plate, splicing slit between the adjacent unit steel plate is positioned at the skeleton place, steel plate edge, described unit is connected on the skeleton by securing member, and the edge joint position of adjacent unit steel plate is provided with hermetically-sealed construction.
Described skeleton is to contain vertical beam and the crossbeam that intersects in length and breadth, vertical beam and crossbeam all adopt i iron or channel-section steel, but preferred i iron, the joint face of described i iron is provided with screwed hole, securing member passes the unit steel plate and is installed in this screwed hole, and the unit steel plate is fixed; The spacing of the Liang Heliang of described skeleton bottom is less than the beam and the horizontal spacing on skeleton top.
Described hermetically-sealed construction contains approximate " several " font weather strip of cross section, between the slit of two adjacent unit steel plates of the bossing clamping of sealing bar, two lower edges of sealing bar are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member.
Described hermetically-sealed construction contains approximate " Ω " font weather strip of cross section, and two lower edges of sealing bar bottom are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member; Sealing bar top is cap, and this cap covers outside the seam of adjacent unit steel plate.
Be connected by stone bolt between the lower edges of described steel work assembled panel and the riverbed toe board, and be provided with hermetically-sealed construction; Between the edge at dam body two ends and riverbed toe board, being connected of described steel work assembled panel by stone bolt, and be provided with hermetically-sealed construction.
The lower edges of described steel work assembled panel embeds interior one section of riverbed toe board, and is provided with hermetically-sealed construction; In the edge at dam body two ends embeds the riverbed toe board one section of described steel work assembled panel, and be provided with hermetically-sealed construction.
Described concrete bearing platform and concrete buttress are the line of demarcation with the riverbed surface, are concrete bearing platform below, are concrete buttress above.
Described concrete bearing platform comprises the half dam body on cushion cap pedestal and its top, and the cushion cap pedestal is positioned at the riverbed, and the half dam body is positioned at top, riverbed, and described concrete buttress is positioned at half dam body top, the cross sectional shape of half dam body and buttress cross sectional shape coupling.
Be provided with inserts in the cavity between the described buttress, this inserts is a building waste.
Described steel work assembled panel surface is provided with the preserving and sealing coating of polyurea materials.Described buttress is a solid construction, or is hollow-core construction, or is the concrete truss structure of hollow out.
Beneficial effect of the present invention
1, this steel work empty stomach combined dam, its panel adopts the steel work assembled panel, inside is provided with skeleton, the skeleton both sides are coated with the unit steel plate respectively, the combined and spliced formation combining structure of unit panel, skeleton is the structure of intersecting in length and breadth, is beneficial to the installation of the unit steel plate in the work progress, is convenient to constructor's walking and depositing of construction tool; The two-sided steel plate that is provided with can improve the barrier performance of this panel, also is beneficial to the maintenance of panel in use of later stage dam simultaneously, and when removing the unit steel plate of front during maintenance, the steel plate of back correspondence also has the antiseepage ability, does not influence the operate as normal on dam.
2, this dam work progress is simplified, duration is short, onesize dam than original can the reduction of erection time 1/2, construction cost reduces by 1/4, replace original concrete anti-seepage panel by the steel work face slab for water retaining, the crack can not occur,, be convenient to the maintenance in later stage yet because this steel work face slab for water retaining adopts fabricated structure.
3, be provided with approximate " several " font weather strip of cross section between the adjacent unit steel plate, perhaps cross section is similar to " Ω " font weather strip, above-mentioned two kinds of weather strips are when playing sealing function, also has certain contraction, when whole steel structure combined panel expanded with heat and contract with cold owing to variations in temperature, the sealing bar can change with the slit between the unit steel plate.
4, this dam adopts buttress formula structure; come the support steel structure face slab for water retaining by the concrete buttress that some is set; the structure of dam body itself has also been simplified many like this; the speed of construction can be further improved, and other fillers can be filled in the cavity between the buttress, the refuse such as building waste; so just can reduce a large amount of exploitations of material; minimizing utilizes discarded in a large number building waste again to environment damage, is beneficial to environmental protection and energy-saving and cost-reducing.
5, the original position of the steel work assembled panel on this dam can begin from the riverbed, also can begin at a certain height place on top, riverbed, and height is versatile and flexible, can according to circumstances choose, to adapt to different ambient conditions.
Description of drawings
Fig. 1 faces one of structural representation for this steel work empty stomach combined dam;
Fig. 2 is one of A-A cross section structure schematic diagram of Fig. 1;
Fig. 3 be Fig. 1 A-A cross section structure schematic diagram two;
Fig. 4 is one of I portion structure for amplifying schematic diagram of Fig. 1 or Fig. 2 or Figure 10;
Fig. 5 be Fig. 1 or Fig. 2 or Figure 10 I portion structure for amplifying schematic diagram two;
Fig. 6 is the framework local structural representation of steel work assembled panel;
Fig. 7 looks schematic diagram for the cushion cap among Fig. 1 with a pier structure master;
Fig. 8 is the sectional structure schematic diagram in the B-B cross section of Fig. 7;
Fig. 9 faces two of structural representation for this steel work empty stomach combined dam;
Figure 10 is the C-C cross section structure schematic diagram of Fig. 9;
Figure 11 looks schematic diagram for cushion cap among Fig. 9 with a pier structure master;
Figure 12 is the cross section structure schematic diagram of the D-D of Figure 11;
Figure 13 is the buttress schematic diagram of hollow-core construction;
Figure 14 is the buttress schematic diagram of the concrete truss structure of hollow out.
The specific embodiment
Referring to Fig. 1-Figure 12,1. riverbeds among the figure, 2. riverbed, 3. unit steel plate, 4. securing member, 5. cushion cap, 6. impervious wall, 7. stone bolt, 8. buttress, 9. crossbeam, 10. vertical beam, approximate " several " font weather strip of 11. cross sections, approximate " Ω " font weather strip of 12. cross sections, wherein 5-1. half dam body, 5-2. cushion cap pedestal.
Embodiment one: referring to Fig. 1, Fig. 2, Fig. 4, Fig. 6-Fig. 8, a kind of steel work empty stomach combined dam among the figure, contain concrete bearing platform below some concrete buttress, the buttress and the steel work panel on buttress, below concrete bearing platform, be provided with impervious wall, described steel work assembled panel cross section and buttress cross section coupling are coated on above the buttress and both sides; This steel work assembled panel contains inner skeleton and several overlay on two lip-deep unit of skeleton steel plate, splicing slit between the adjacent unit steel plate is positioned at the skeleton place, steel plate edge, described unit is connected on the skeleton by securing member, and the edge joint position of adjacent unit steel plate is provided with hermetically-sealed construction.
Described skeleton is to contain vertical beam and the crossbeam that intersects in length and breadth, and vertical beam and crossbeam all adopt i iron, and the joint face of described i iron is provided with screwed hole, and securing member passes the unit steel plate and is installed in this screwed hole, and the unit steel plate is fixed; The spacing of the Liang Heliang of described skeleton bottom is less than the beam and the horizontal spacing on skeleton top.
Described hermetically-sealed construction contains approximate " several " font weather strip of cross section, between the slit of two adjacent unit steel plates of the bossing clamping of sealing bar, two lower edges of sealing bar are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member.Be connected (as shown in Figure 2) by stone bolt between the lower edges of described steel work assembled panel and the riverbed toe board, and be provided with hermetically-sealed construction; Described steel work assembled panel between the edge at dam body two ends and riverbed toe board, be connected (draw among the figure, its structure is similar between the lower edges and riverbed toe board of steel work assembled panel) herein by stone bolt, and be provided with hermetically-sealed construction.
Described concrete bearing platform and concrete buttress are the line of demarcation with the riverbed surface, are concrete bearing platform below, are concrete buttress above.
Described steel work assembled panel surface is provided with the preserving and sealing coating of polyurea materials.Described buttress is a solid construction.
Embodiment two: referring to Fig. 1, Fig. 3, Fig. 4, Fig. 6-Fig. 8, embodiment two and embodiment one are basic identical, something in common does not repeat, and difference is that the lower edges of described steel work assembled panel embeds in the riverbed toe board one section (as shown in Figure 2), and is provided with hermetically-sealed construction; In the edge at dam body two ends embeds the riverbed toe board one section of described steel work assembled panel, and be provided with hermetically-sealed construction.
Embodiment three: referring to Fig. 1, Fig. 2, Fig. 5, Fig. 6-Fig. 8, embodiment three and embodiment one are basic identical, something in common does not repeat, difference is that described hermetically-sealed construction contains approximate " Ω " font weather strip of cross section, two lower edges of sealing bar bottom are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member; Sealing bar top is cap, and this cap covers outside the seam of adjacent unit steel plate.
Embodiment four: referring to Fig. 1, Fig. 3, Fig. 5, Fig. 6-Fig. 8, embodiment four and embodiment two are basic identical, something in common does not repeat, difference is that described hermetically-sealed construction contains approximate " Ω " font weather strip of cross section, two lower edges of sealing bar bottom are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member; Sealing bar top is cap, and this cap covers outside the seam of adjacent unit steel plate.
Embodiment five: referring to Fig. 9, Figure 10, Figure 11, Figure 12, Fig. 4, a kind of steel work empty stomach combined dam among the figure, contain concrete bearing platform below some concrete buttress, the buttress and the steel work panel on buttress, below concrete bearing platform, be provided with impervious wall, described steel work assembled panel cross section and buttress cross section coupling are coated on above the buttress and both sides; This steel work assembled panel contains inner skeleton and several overlay on two lip-deep unit of skeleton steel plate, splicing slit between the adjacent unit steel plate is positioned at the skeleton place, steel plate edge, described unit is connected on the skeleton by securing member, and the edge joint position of adjacent unit steel plate is provided with hermetically-sealed construction.
Described skeleton is to contain vertical beam and the crossbeam that intersects in length and breadth, and vertical beam and crossbeam all adopt i iron, and the joint face of described i iron is provided with screwed hole, and securing member passes the unit steel plate and is installed in this screwed hole, and the unit steel plate is fixed.
Described hermetically-sealed construction contains approximate " several " font weather strip of cross section, between the slit of two adjacent unit steel plates of the bossing clamping of sealing bar, two lower edges of sealing bar are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member.
Described concrete bearing platform comprises the half dam body on cushion cap pedestal and its top, and the cushion cap pedestal is positioned at the riverbed, and the half dam body is positioned at top, riverbed, and described concrete buttress is positioned at half dam body top, the cross sectional shape of half dam body and buttress cross sectional shape coupling.
Described steel work assembled panel surface is provided with the preserving and sealing coating of polyurea materials.Described buttress is a solid construction.
Embodiment six: referring to Fig. 9, Figure 10, Figure 11, Figure 12, Fig. 5, embodiment six and embodiment five are basic identical, something in common does not repeat, difference contains approximate " Ω " font weather strip of cross section for the hermetically-sealed construction described in the embodiment six, two lower edges of sealing bar bottom are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member; Sealing bar top is cap, and this cap covers outside the seam of adjacent unit steel plate.
Referring to Figure 13, Figure 14, the buttress in the foregoing description can also be hollow-core construction, or is the concrete truss structure of hollow out, can form more embodiment, does not describe in detail one by one at this, all belongs to the protection domain of this patent.
Between the buttress in the foregoing description cavity in can be provided with inserts, this inserts is a building waste, also can form more embodiment, does not describe in detail one by one at this, also belongs to the protection domain of this patent.
Claims (10)
1. steel work combined dam on an empty stomach, contain concrete bearing platform below some concrete buttress, the buttress and the steel work panel on buttress, below concrete bearing platform, be provided with impervious wall, described steel work assembled panel cross section and buttress cross section coupling are coated on above the buttress and both sides; This steel work assembled panel contains inner skeleton and several overlay on two lip-deep unit of skeleton steel plate, splicing slit between the adjacent unit steel plate is positioned at the skeleton place, steel plate edge, described unit is connected on the skeleton by securing member, and the edge joint position of adjacent unit steel plate is provided with hermetically-sealed construction.
2. steel work according to claim 1 is combined dam on an empty stomach, it is characterized in that: described skeleton is to contain vertical beam and the crossbeam that intersects in length and breadth, and vertical beam and crossbeam all adopt i iron or channel-section steel; The spacing of the Liang Heliang of described skeleton bottom is less than the beam and the horizontal spacing on skeleton top.
3. steel work according to claim 1 is combined dam on an empty stomach, it is characterized in that: described hermetically-sealed construction contains approximate " several " font weather strip of cross section, between the slit of two adjacent unit steel plates of the bossing clamping of sealing bar, two lower edges of sealing bar are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member.
4. steel work according to claim 1 is combined dam on an empty stomach, it is characterized in that: described hermetically-sealed construction contains approximate " Ω " font weather strip of cross section, two lower edges of sealing bar bottom are fitted in respectively between the surface of unit steel plate and skeleton, and are fixed by described securing member; Sealing bar top is cap, and this cap covers outside the seam of adjacent unit steel plate.
5. steel work according to claim 1 is combined dam on an empty stomach, it is characterized in that: be connected by stone bolt between the lower edges of described steel work assembled panel and the riverbed toe board, and be provided with hermetically-sealed construction; Between the edge at dam body two ends and riverbed toe board, being connected of described steel work assembled panel by stone bolt, and be provided with hermetically-sealed construction.
6. steel work according to claim 1 is combined dam on an empty stomach, it is characterized in that: the lower edges of described steel work assembled panel embeds interior one section of riverbed toe board, and is provided with hermetically-sealed construction; In the edge at dam body two ends embeds the riverbed toe board one section of described steel work assembled panel, and be provided with hermetically-sealed construction.
7. steel work according to claim 1 is combined dam on an empty stomach, and it is characterized in that: described concrete bearing platform and concrete buttress are the line of demarcation with the riverbed surface, are concrete bearing platform below, are concrete buttress above.
8. steel work according to claim 1 is combined dam on an empty stomach, it is characterized in that: described concrete bearing platform comprises the half dam body on cushion cap pedestal and its top, the cushion cap pedestal is positioned at the riverbed, the half dam body is positioned at top, riverbed, described concrete buttress is positioned at half dam body top, the cross sectional shape of half dam body and buttress cross sectional shape coupling.
9. steel work according to claim 1 is combined dam on an empty stomach, and it is characterized in that: be provided with inserts in the cavity between the described buttress, this inserts is a building waste.
10. steel work according to claim 1 is combined dam on an empty stomach, and it is characterized in that: described steel work assembled panel surface is provided with the preserving and sealing coating of polyurea materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100634107A CN102155006B (en) | 2011-03-16 | 2011-03-16 | Steel structure open web combined dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100634107A CN102155006B (en) | 2011-03-16 | 2011-03-16 | Steel structure open web combined dam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102155006A true CN102155006A (en) | 2011-08-17 |
| CN102155006B CN102155006B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100634107A Expired - Fee Related CN102155006B (en) | 2011-03-16 | 2011-03-16 | Steel structure open web combined dam |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912769A (en) * | 2012-10-29 | 2013-02-06 | 天津大学 | Dragline buttress steel dam |
| CN103031822A (en) * | 2011-09-30 | 2013-04-10 | 杨清太 | Construction method for arched structure thin-layer wall surface water seepage pressure reduction dam |
| CN107869351A (en) * | 2017-11-15 | 2018-04-03 | 中国水利水电第十工程局有限公司 | A kind of method of the high narrow large-scale solution cavity Cavity treatment security protection of type |
| CN113322904A (en) * | 2021-06-04 | 2021-08-31 | 中国电建集团成都勘测设计研究院有限公司 | High-spraying impervious wall for covering layer foundation concrete dam and construction method thereof |
| CN113789759A (en) * | 2021-09-24 | 2021-12-14 | 中国矿业大学(北京) | Assembled arc-shaped artificial dam body of coal mine underground reservoir and construction method thereof |
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| CN2521254Y (en) * | 2002-02-10 | 2002-11-20 | 杨继华 | Steel cable flexible dam |
| CN2858770Y (en) * | 2005-12-26 | 2007-01-17 | 李文良 | Steel skeleton construction used for concrete dam |
| JP2008184873A (en) * | 2007-01-31 | 2008-08-14 | Nippon Steel & Sumikin Metal Products Co Ltd | Stone-filled structure |
| CN101974896A (en) * | 2010-10-27 | 2011-02-16 | 华北水利水电学院 | Buttress-type steel structure dam |
| CN201972138U (en) * | 2011-03-16 | 2011-09-14 | 华北水利水电学院 | Hollow combined dam with steel structure |
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2011
- 2011-03-16 CN CN2011100634107A patent/CN102155006B/en not_active Expired - Fee Related
Patent Citations (5)
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|---|---|---|---|---|
| CN2521254Y (en) * | 2002-02-10 | 2002-11-20 | 杨继华 | Steel cable flexible dam |
| CN2858770Y (en) * | 2005-12-26 | 2007-01-17 | 李文良 | Steel skeleton construction used for concrete dam |
| JP2008184873A (en) * | 2007-01-31 | 2008-08-14 | Nippon Steel & Sumikin Metal Products Co Ltd | Stone-filled structure |
| CN101974896A (en) * | 2010-10-27 | 2011-02-16 | 华北水利水电学院 | Buttress-type steel structure dam |
| CN201972138U (en) * | 2011-03-16 | 2011-09-14 | 华北水利水电学院 | Hollow combined dam with steel structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031822A (en) * | 2011-09-30 | 2013-04-10 | 杨清太 | Construction method for arched structure thin-layer wall surface water seepage pressure reduction dam |
| CN102912769A (en) * | 2012-10-29 | 2013-02-06 | 天津大学 | Dragline buttress steel dam |
| CN107869351A (en) * | 2017-11-15 | 2018-04-03 | 中国水利水电第十工程局有限公司 | A kind of method of the high narrow large-scale solution cavity Cavity treatment security protection of type |
| CN107869351B (en) * | 2017-11-15 | 2019-07-19 | 中国水利水电第十一工程局有限公司 | A kind of method of high narrow type large size solution cavity Cavity treatment security protection |
| CN113322904A (en) * | 2021-06-04 | 2021-08-31 | 中国电建集团成都勘测设计研究院有限公司 | High-spraying impervious wall for covering layer foundation concrete dam and construction method thereof |
| CN113789759A (en) * | 2021-09-24 | 2021-12-14 | 中国矿业大学(北京) | Assembled arc-shaped artificial dam body of coal mine underground reservoir and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN102155006B (en) | 2012-05-30 |
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