CN104988945A - Efficient construction method for pumped storage power station set and temporary supporting structure - Google Patents
Efficient construction method for pumped storage power station set and temporary supporting structure Download PDFInfo
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- CN104988945A CN104988945A CN201510272500.5A CN201510272500A CN104988945A CN 104988945 A CN104988945 A CN 104988945A CN 201510272500 A CN201510272500 A CN 201510272500A CN 104988945 A CN104988945 A CN 104988945A
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- pit liner
- iron
- liner section
- seat ring
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Abstract
The invention discloses an efficient construction method for a pumped storage power station set. The method comprises following steps: casting a large-diameter pit liner, and polishing and machining a seat ring; installing steel supports and hoisting a bottom ring after the large-diameter pit liner is casted; casting the small-diameter pit liner; dismounting the steel supports after the seat ring is polished and machined; and then connecting the bottom ring and the seat ring through bolts and through a welding manner. A temporary supporting structure constructed according to the method mentioned above comprises the large-diameter pit liner (1) and the small-diameter pit liner (2). The large-diameter pit liner (1) is internally provided with the seat ring (3), the multiple steel supports and the bottom ring (4), and the diameter of the bottom ring (4) is larger than the inner diameter of the small-diameter pit liner (2). Each steel support comprises an overhung I-steel (5) and diagonal bracing I-steel (6), and the inclination angle of the diagonal bracing I-steel (6) is 25-35 degrees. The construction method and the temporary supporting structure are advantaged by high security, high stability and high construction efficiency, and a whole construction period can be greatly shortened.
Description
Technical field
The present invention relates to a kind of a kind of high pumped storage power plant unit installation method of pumped storage power plant unit installation method and temporary support structure, particularly efficiency of construction and temporary support structure.
Background technology
In pumped storage power plant unit installation process, each flange face of the seat ring in first being cheated by machine and seam is needed to carry out machine polishing, this operation polishing the time be generally 30 ~ 40 days, the rear base ring that just can carry out the hydraulic turbine of having polished cheat with machine in seat ring between bolt be connected and weld.Internal diameter due to the path pit liner section being positioned at top is less than the diameter of base ring, and base ring is overall structure, so existing pumped storage power plant unit installation orientation is for first to build large footpath pit liner section, then the polishing processing of seat ring is carried out, after having polished, base ring lifted into machine hole and be connected with seat ring, finally building path pit liner section; Thus building after processing needs to wait base ring polishing to machine of path pit liner section is carried out again, cause the prolongation of the idle of constructor and overall pumped storage power plant unit installation duration.Therefore, existing pumped storage power plant unit installation method also exists the problem that efficiency of construction is lower and the integral construction duration is longer.
Summary of the invention
The object of the invention is to, a kind of pumped storage power plant unit installation method and temporary support structure are efficiently provided.The present invention not only has the advantage that safety is high and efficiency of construction is high, can also shorten the integral construction duration.
Technical scheme of the present invention: pumped storage power plant unit installation method efficiently, the method first carries out the concreting of large footpath pit liner section, carries out polishing processing to seat ring; After the concreting completing large footpath pit liner section, bracing members is installed and lifts base ring on bracing members; After lifting base ring completes, carry out the concreting of path pit liner section; After completing seat ring polishing processing, remove bracing members, base ring lifting is carried out bolt connection and welding to seat ring place.
In aforesaid efficient pumped storage power plant unit installation method, 30 ~ 40 days consuming time of the polishing processing of described seat ring.
According to the temporary support structure constructed by aforesaid efficient pumped storage power plant unit installation method, comprise large footpath pit liner section and the path pit liner section being positioned at pit liner section upper end, large footpath; The inside of large footpath pit liner section is provided with seat ring, and the inside of large footpath pit liner section is also connected with base ring by some bracing members, and the diameter of base ring is greater than the internal diameter of path pit liner section; Each bracing members includes encorbelment i iron and diagonal brace i iron, and diagonal brace i iron to be positioned at below i iron of encorbelmenting and to connect i iron of encorbelmenting, and the angle of inclination of diagonal brace i iron is 25 ° ~ 35 °.
In aforesaid temporary support structure, described in i iron of encorbelmenting comprise and be positioned at inside the pit liner section of large footpath unsettled section and be positioned at and bury dress section outside the pit liner section of large footpath, the length of burying dress section is more than or equal to the twice of suspended length.
In aforesaid temporary support structure, the angle of inclination of described diagonal brace i iron is 30 °.
In aforesaid temporary support structure, described base ring and bracing members are all positioned at the top of seat ring, and the machine that is also provided with between base ring and seat ring is cheated into people's gallery.
Compared with prior art, present invention improves over the construction method of pumped storage power plant unit and devise temporary support structure; First carry out the concreting of large footpath pit liner section, polishing processing is carried out to seat ring; After the concreting completing large footpath pit liner section, bracing members is installed and lifts base ring on bracing members; After lifting base ring completes, carry out the concreting of path pit liner section; After completing seat ring polishing processing, remove bracing members, base ring lifting is carried out bolt connection and welding to seat ring place.The present invention carries out temporary support by installing bracing members to base ring, thus can carry out the concreting work of path pit liner section while carrying out seat ring polishing processing, improves efficiency of construction; Make the concreting work of path pit liner section shift to an earlier date 30 ~ 40 days, significantly shorten the integral construction duration.The present invention is more than or equal to the twice of suspended length by the encorbelment dress segment length of burying of i iron of force analysis setting, guarantees to support base ring safely and effectively; By connecting diagonal brace i iron below i iron of encorbelmenting, and the angle of inclination of diagonal brace i iron is 25 ° ~ 35 °, improves the stability of structure, improves safety further.Therefore, the present invention not only has the advantage that safety is high, stability is high and efficiency of construction is high, can also significantly shorten the integral construction duration.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Being labeled as in accompanying drawing: 1-large footpath pit liner section, 2-path pit liner section, 3-seat ring, 4-base ring, 5-encorbelments i iron, and 6-diagonal brace i iron, unsettled section of 7-, 8-buries dress section, and 9-machine is cheated into people's gallery.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but not as the foundation limited the present invention.
Embodiment.Efficient pumped storage power plant unit installation method, as shown in Figure 1, 2, the method first carries out the concreting of large footpath pit liner section 1, carries out polishing processing to seat ring 3; After the concreting completing large footpath pit liner section 1, bracing members is installed and on bracing members, lifts base ring 4; After lifting base ring 4 completes, carry out the concreting of path pit liner section 2; After completing seat ring 3 polishing processing, remove bracing members, base ring 4 is lifted and carries out bolt connection and welding to seat ring 3 place.
30 ~ 40 days consuming time of the polishing processing of described seat ring 3.
According to the temporary support structure constructed by aforesaid efficient pumped storage power plant unit installation method, form as shown in Figure 1, 2, comprise large footpath pit liner section 1 and the path pit liner section 2 being positioned at pit liner section 1 upper end, large footpath; The inside of large footpath pit liner section 1 is provided with seat ring 3, and the inside of large footpath pit liner section 1 is also connected with base ring 4 by the bracing members of 8, and the diameter of base ring 4 is greater than the internal diameter of path pit liner section 2; Each bracing members includes encorbelment i iron 5 and diagonal brace i iron 6, and diagonal brace i iron 6 to be positioned at below i iron 5 of encorbelmenting and to connect i iron 5 of encorbelmenting, and the angle of inclination of diagonal brace i iron 6 is 25 ° ~ 35 °.
Described i iron 5 of encorbelmenting comprises and is positioned at inside large footpath pit liner section 1 unsettled section 7 and be positioned at and bury dress section 8 outside large footpath pit liner section 1, the length of burying dress section 8 is more than or equal to the twice of unsettled section of 7 length, the length of burying dress section 8 is 1m, and unsettled section of 7 length are 2m; The angle of inclination of described diagonal brace i iron 6 is 30 °; Described base ring 4 and bracing members are all positioned at the top of seat ring 3, and the machine that is also provided with between base ring 4 and seat ring 3 is cheated into people's gallery 9.
The present invention carries out temporary support by installing bracing members to base ring 4, thus can carry out the concreting work of path pit liner section 2 while carrying out seat ring 3 polishing processing, improves efficiency of construction; Make the concreting work of path pit liner section 2 shift to an earlier date 30 ~ 40 days, significantly shorten the integral construction duration.The angle of inclination of diagonal brace i iron 6 is 30 °, not only guarantees to play larger supporting role to i iron 5 of encorbelmenting, and can also ensure that diagonal brace i iron 6 is from the connective stability in large footpath pit liner section 1.
Safety analysis:
If base ring 4 is conducted oneself with dignity, total load is 80t; Constructor is 5 people, and everyone calculates by body weight 75Kg, and load is 5*75Kg*10=3.75KN; Construction equipment load is 3KN; Dynamic load is 2KN; Other load is 1KN; Consider that nonuniformity coefficient gets 1.3, dynamic loading coefficient gets 2.0, and therefore total load is G=800+ (3.75+3+2+1) * 1.3*2=825.35KN; To divide equally to 8 i iron 5 of encorbelmenting every root i iron 5 load of encorbelmenting is 103.17KN.
Get single i iron 5 of encorbelmenting to calculate: I25b i iron selected by i iron 5 of encorbelmenting, deadweight amplification coefficient is 1.2, and outer cantilever span presses 1m; Web total thickness 10mm, plasticity coefficient is 1.05, and integral stability factor is 0.6.Obtained by thickest 13mm: cross section tension resistance to compression flexural strength design load f=215MPa, cross section shear strength design load fv=125MPa, shearing maximum value is 103.674KN, and moment of flexure maximum value is 51.837KN.M, and maximum defluxion is 1.19146mm; Calculating maximum shear stress is 48.0079MPa, and strength stress is 116.876MPa, and stable stress is 204.534MPa, all satisfied.
Get single diagonal brace i iron 6 to calculate: I16 i iron selected by diagonal brace i iron 6, deadweight amplification coefficient is 1.2, and span equals to encorbelment the outer cantilever span of i iron 5; The same
Maximum shear stress is 30.0049MPa, and strength stress is 29.2191MP, and stable stress is 51.1334MPa.Safety factor is 204.534/51.1334=4, and safety factor improves 4 times, and namely safety improves 4 times, and safety and stability is good.
Claims (6)
1. efficient pumped storage power plant unit installation method, is characterized in that: the method first carries out the concreting of large footpath pit liner section, carries out polishing processing to seat ring; After the concreting completing large footpath pit liner section, bracing members is installed and lifts base ring on bracing members; After lifting base ring completes, carry out the concreting of path pit liner section; After completing seat ring polishing processing, remove bracing members, base ring lifting is carried out bolt connection and welding to seat ring place.
2. efficient pumped storage power plant unit installation method according to claim 1, is characterized in that: 30 ~ 40 days consuming time of the polishing processing of described seat ring.
3. according to the temporary support structure constructed by efficient pumped storage power plant unit installation method described in claim 1 or 2, it is characterized in that: comprise large footpath pit liner section (1) and be positioned at the path pit liner section (2) of pit liner section (1) upper end, large footpath; The inside of large footpath pit liner section (1) is provided with seat ring (3), the inside of large footpath pit liner section (1) is also connected with base ring (4) by some bracing members, and the diameter of base ring (4) is greater than the internal diameter of path pit liner section (2); Each bracing members includes i iron of encorbelmenting (5) and diagonal brace i iron (6), diagonal brace i iron (6) is positioned at i iron of encorbelmenting (5) below and connects i iron (5) of encorbelmenting, and the angle of inclination of diagonal brace i iron (6) is 25 ° ~ 35 °.
4. temporary support structure according to claim 3, it is characterized in that: described in encorbelment that i iron (5) comprises unsettled section (7) being positioned at large footpath pit liner section (1) inner side and be positioned at large footpath pit liner section (1) outside burying dress section (8), bury the length filling section (8) and be more than or equal to the twice of unsettled section of (7) length.
5. temporary support structure according to claim 3, is characterized in that: the angle of inclination of described diagonal brace i iron (6) is 30 °.
6. the temporary support structure according to claim 3,4 or 5, it is characterized in that: described base ring (4) and bracing members are all positioned at the top of seat ring (3), the machine that is also provided with between base ring (4) and seat ring (3) is cheated into people's gallery (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510272500.5A CN104988945B (en) | 2015-05-25 | 2015-05-25 | Hydroenergy storage station unit installation method and temporary support structure |
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| CN201510272500.5A CN104988945B (en) | 2015-05-25 | 2015-05-25 | Hydroenergy storage station unit installation method and temporary support structure |
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| CN104988945B CN104988945B (en) | 2017-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268629A (en) * | 2018-11-26 | 2019-01-25 | 国家电网有限公司 | A kind of storage station's unit base ring temporary support structure |
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| WO2010048887A1 (en) * | 2008-10-28 | 2010-05-06 | 成都阿朗科技有限责任公司 | Speedy construction method for penstock of large scale hydraulic turbine |
| CN102296577A (en) * | 2011-05-27 | 2011-12-28 | 长江勘测规划设计研究有限责任公司 | Embedding technology of volute combination of large hydroelectric generating set |
| CN104100437A (en) * | 2014-06-26 | 2014-10-15 | 中国葛洲坝集团股份有限公司 | Lower bracket mounting foundation positioning device and method of hydroelectric generating set |
| CN204023608U (en) * | 2014-08-18 | 2014-12-17 | 北京燃气能源发展有限公司 | A kind of generating set of cold, heat and electricity triple supply is installed basis |
-
2015
- 2015-05-25 CN CN201510272500.5A patent/CN104988945B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010048887A1 (en) * | 2008-10-28 | 2010-05-06 | 成都阿朗科技有限责任公司 | Speedy construction method for penstock of large scale hydraulic turbine |
| CN102296577A (en) * | 2011-05-27 | 2011-12-28 | 长江勘测规划设计研究有限责任公司 | Embedding technology of volute combination of large hydroelectric generating set |
| CN104100437A (en) * | 2014-06-26 | 2014-10-15 | 中国葛洲坝集团股份有限公司 | Lower bracket mounting foundation positioning device and method of hydroelectric generating set |
| CN204023608U (en) * | 2014-08-18 | 2014-12-17 | 北京燃气能源发展有限公司 | A kind of generating set of cold, heat and electricity triple supply is installed basis |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268629A (en) * | 2018-11-26 | 2019-01-25 | 国家电网有限公司 | A kind of storage station's unit base ring temporary support structure |
| CN109268629B (en) * | 2018-11-26 | 2024-01-19 | 国家电网有限公司 | Temporary supporting structure for bottom ring of energy storage power station unit |
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| Publication number | Publication date |
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| CN104988945B (en) | 2017-04-05 |
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