CN110172989B - High-voltage mortise and tenon structure assembled main transformer foundation - Google Patents
High-voltage mortise and tenon structure assembled main transformer foundation Download PDFInfo
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- CN110172989B CN110172989B CN201910577845.XA CN201910577845A CN110172989B CN 110172989 B CN110172989 B CN 110172989B CN 201910577845 A CN201910577845 A CN 201910577845A CN 110172989 B CN110172989 B CN 110172989B
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- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 16
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to the technical field of electric power foundation construction and discloses a high-voltage mortise and tenon structure assembled main transformer foundation; the problems that the assembled main transformer has large basic weight, is not firm in connection, is easy to generate uneven stress and cannot bear high-voltage facilities are solved; the main transformer foundation comprises a bottom plate foundation and a buttress which is arranged on the bottom plate foundation and meshed with the bottom plate foundation; the base plate foundation and the support column are composed of an upper independent component and a lower independent component which are mutually meshed, and the upper independent component and the lower independent component are crossed and meshed to form a mortise-tenon structure; according to the invention, the independent components are manufactured and maintained in advance, so that the transportation and the hoisting are convenient, the efficiency of on-site work is improved, the independent components on the same layer and up and down are arranged in a crossing manner, and the physical occlusion is completely adopted; the cross arrangement of the bottom plates ensures that the stress is more uniform and reasonable, the supporting force of the bottom plates and the supporting columns is strong, and the main transformer foundation requirements of 110kV and above voltage levels can be met.
Description
Technical Field
The invention relates to the technical field of electric power foundation construction, in particular to a high-voltage mortise and tenon structure assembled main transformer foundation, which is suitable for a high-voltage assembled main transformer foundation with the voltage of more than 110 kV.
Background
The traditional 110kV main transformer foundation is a cast-in-place concrete independent foundation, and the cast-in-place foundation needs on-site formwork support, binding, pouring and maintenance, has long construction period and does not meet the requirements of reconstruction and extension construction periods; different foundation design sizes are not uniform, the types of consumed templates are more, and the construction complexity is increased; the on-site wet operation has great influence on environmental protection.
The existing prefabricated main transformer foundation types are low voltage levels, and are difficult to apply to main transformers with high voltage levels of 110kV and above, the main transformer foundation sizes are increased along with the higher the voltage levels, and the main transformer foundation components are large in size, heavy in structure and high in hoisting cost in transportation and construction sites, and particularly, the reconstruction and expansion engineering is limited by sites and cannot apply large-tonnage crane equipment.
Aiming at the problems, the assembled main transformer foundation structure also exists at present, but the independent structures are connected by bolts and the like, so that the problems of infirm connection and uneven stress of a bottom plate are caused, a large number of the main transformer foundation structure is too heavy, the operation is inconvenient, and the main transformer foundation structure is difficult to apply to the main transformer foundation with the voltage level of 110kV and above.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides the assembled main transformer foundation with the high-voltage mortise-tenon structure, aiming at the problems that the existing assembled main transformer foundation is not firmly connected, uneven stress is easy to occur and cannot bear high-voltage facilities.
The invention is realized by the following technical scheme.
The high-voltage assembled main transformer foundation comprises a plurality of independent components, wherein a plurality of protrusions are arranged on the surfaces of the independent components, so that the independent components are spliced to form a mortise-tenon structure through up-down cross engagement of the protrusions; the independent components are vertically connected and fixed through embedded bars, the independent components are of a wide flat beam structure, and the ratio of the width to the height of the wide flat beam is 4-5:1; each independent component adopts a unique wide flat beam design, and compared with the common plate component, the width and deformation of the crack are greatly reduced.
Further, the main transformer foundation comprises a bottom plate foundation and a plurality of buttresses which are arranged on the bottom plate foundation and meshed with the bottom plate foundation; the buttress is used for preventing the main transformer foundation from laterally deforming; the base plate foundation and the buttress are composed of an upper independent component and a lower independent component which are mutually meshed, and the upper independent component and the lower independent component are in cross-shaped cross-meshed connection.
Still further, bottom plate basis lower part be provided with the piece raft bottom plate, the piece raft bottom plate constitute by first big board of piece raft and second big board of piece raft, be provided with on the big board of first piece raft and reserve stealthy bolt hole, the second big board of piece raft on be provided with the pre-buried bolt that the stealthy bolt hole position corresponds is reserved, big board of first piece raft and second piece raft pass through the tongue-and-groove connection. The two large plates are in tongue-and-groove design, and are connected by using the pressure-bearing high-strength bolts, so that sedimentation of single components due to uneven foundations is avoided, and the overall stability of the structure is improved.
Furthermore, the distance between the buttresses is consistent with the track gauge of the transformer to be erected. And meanwhile, the two elastic plates are symmetrically arranged on the vertical compression surface of the concave-convex piece of the bottom plate, so that the requirements of clear force transmission route and uniform stress of the structure are met.
Further, the surfaces of the upper independent component and the lower independent component of the base plate are connected through steel plate welding seams.
And optimizing on the basis of the previous step, wherein the steel plate is pre-embedded in an upper independent component or a lower independent component of the outermost layer of the base plate. The outermost members of the two layers of foundations at the bottom are connected through full welding seams between the embedded steel plates, so that the degree of freedom of the outer members is reduced to be almost zero, and the overall stability of the foundations is improved.
Further, the independent component comprises a framework and a pouring layer on the framework, and the framework comprises an inner layer and an outer layer of sleeved stirrup structure. The whole cross section adopts the composite stirrup form of a large-sleeve small-sleeve, so that the transportation loss rate is reduced, the local compression damage of the component and the stress concentration of the occlusal surface are avoided, and the repeated use rate of the component is improved.
Further, the independent component is internally provided with a hidden hanging nail. The hidden hanging nails are slightly lower than the surfaces of the independent components, so that no protrusion exists on the plane of each structure, and the layers are tightly attached.
Furthermore, grouting pores are reserved at concave-convex occlusion positions of the independent components. Meets the prefabrication requirement of factories; the on-site grouting material is bonded, so that the requirement of integrity is met; the bottoms of the concave-convex parts are completely matched without leaving gaps, so that the upper part and the lower part are tightly compacted, and the requirement of uniform stress is met.
Compared with the prior art, the invention has the following beneficial effects:
the invention is convenient for transportation and hoisting by respectively manufacturing and maintaining the independent components in advance, and then is transported to a construction site for combination and installation, thereby improving the efficiency of on-site work, reducing construction procedures, shortening construction period and having strong feasibility. The same layer and the upper and lower independent components are arranged in a crossed way, and physical occlusion is completely adopted; the cross arrangement of the bottom plates makes the stress more uniform and reasonable, the supporting force of the bottom plates and the buttresses is strong, and meanwhile, the construction difficulty is reduced due to fewer bolt connections. The components of the bottom plate and the support piers are all in concave-convex occlusion and are in physical connection, so that the weight of upper equipment can be uniformly transferred to the bottom plate through the support piers; simultaneously meets the basic anti-capsizing requirement; the main transformer foundation support requirement of 110kV and above voltage class can be met. The raft bottom plate is arranged at the lower part of the bottom plate foundation, so that sedimentation of single components due to uneven foundations is avoided, and the overall stability of the structure is improved. The whole main transformer foundation is greatly reduced in weight on the premise of ensuring the bearing strength and stability of the foundation through the structure and the connection relation of each independent component, and is convenient to transport and install and simultaneously suitable for high voltage class.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1.
Fig. 2 is a schematic structural view of the raft base plate of example 1 without the sheet.
Fig. 3 is a schematic structural view of a first independent component in embodiment 1.
Fig. 4 is a bottom view of fig. 3.
Fig. 5 is a schematic structural view of a second independent member in embodiment 1.
Fig. 6 is a bottom view of fig. 5.
Fig. 7 is a schematic structural view of a third independent member in embodiment 1.
Fig. 8 is a bottom view of fig. 7.
Fig. 9 is a schematic structural view of a fourth independent member in embodiment 1.
Fig. 10 is a bottom view of fig. 9.
Fig. 11 is a schematic structural view of a fifth independent member in embodiment 1.
Fig. 12 is a bottom view of fig. 11.
Fig. 13 is a schematic structural view of a sixth independent member in embodiment 1.
Fig. 14 is a bottom view of fig. 13.
Fig. 15 is a schematic structural view of a seventh independent member in embodiment 1.
Fig. 16 is a bottom view of fig. 15.
Fig. 17 is a schematic structural view of an eighth independent member in embodiment 1.
Fig. 18 is a bottom view of fig. 17.
Fig. 19 is a schematic structural view of a ninth independent member in embodiment 1.
Fig. 20 is a bottom view of fig. 19.
Fig. 21 is a schematic structural view of a tenth independent component in embodiment 1.
Fig. 22 is a bottom view of fig. 21.
Wherein 1 is a first independent component, 2 is a second independent component, 3 is a third independent component, 4 is a fourth independent component, 5 is a fifth independent component, 6 is a sixth independent component, 7 is a seventh independent component, 8 is an eighth independent component, 9 is a ninth independent component, 10 is a tenth independent component, 11 is a steel plate, 12 is a steel bar, 13 is a steel bar hole, 14 is a hidden hanging ring, 15 is a hidden bolt hole, and 16 is a bolt.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
Example 1
As shown in fig. 1, the 110kV assembled main transformer foundation structure is formed by reasonably splitting a main transformer foundation into 14 independent components, wherein the 14 independent components adopt 6 raised structural modes, as shown in fig. 3-18, respectively: the weight of the independent structure is obviously reduced compared with that of the existing main transformer foundation independent structure unit, and the factory prefabrication and then the on-site construction mode is completely realized. And each independent component is provided with an invisible hanging nail, so that the invisible hanging nail is convenient to transport and hoist, and the construction is practical. Each independent component adopts a unique wide flat beam design, the whole section adopts a composite stirrup form of a large sleeve and a small sleeve, the transportation loss rate is reduced, the local compression damage of the component and the stress concentration of the occlusal surface are avoided, and the repeated use rate of the component is improved.
The main transformer foundation comprises a bottom plate foundation and a buttress which is arranged on the bottom plate foundation and meshed with the bottom plate foundation; the bottom plate foundation consists of an upper independent component and a lower independent component which are mutually meshed, the lower independent component of the bottom plate foundation comprises a seventh independent structure 7, a sixth independent component 6, an eighth independent structure 8, a sixth independent component 6 and a seventh independent structure 7 which are sequentially and horizontally connected, the bottoms of the seventh independent structure 7, the sixth independent component 6 and the eighth independent structure 8 are all planar structures, the upper surfaces of the seventh independent structure 7 and the eighth independent structure 8 are respectively three convex surfaces, steel plates 11 are pre-buried on the three convex surfaces of the seventh independent structure 7, steel plates 11 are pre-buried on the two convex surfaces of the outer edge of the eighth independent structure 8, the sixth independent component 6 is provided with two convex surfaces, and the positions of the seventh independent structure 7 and the eighth independent structure 8 are respectively staggered with the convex surfaces of the sixth independent component 6.
The upper independent component of the base plate foundation comprises a fifth independent component 5, a fourth independent component 4, a third independent component 3, a fourth independent component 4 and a fifth independent component 5 which are sequentially and horizontally connected, wherein the upper surface and the lower surface of the third independent component 3 are respectively provided with two convex structures, the lower surface of the upper surface of the fourth independent component 4 is respectively provided with two convex surfaces, the lower surface of the fourth independent component 4 is provided with three convex surfaces, the upper surface of the fifth independent component 5 is a plane, the lower surface of the upper surface of the fifth independent component is provided with two convex structures, and the convex surfaces of the third independent component 3 and the fourth independent component 4 are arranged in a staggered manner; the upper surfaces of the third independent component 3 and the fifth independent component 5 are respectively provided with embedded bars 12; the lower surfaces of the third independent component 3, the fourth independent component 4 and the fifth independent component 5 of the upper layer are respectively buckled with the upper surfaces of the seventh independent component 7, the sixth independent component 6 and the eighth independent component 8 of the lower layer in a crisscross manner, and meanwhile, the independent components on the periphery are connected through steel plate welding seams, so that the base plate foundation is more stable.
The buttress is also two-layer from top to bottom, and the upper strata is first independent component 1, and the upper surface of first independent component 1 is planar structure, and the lower surface is provided with 3 archs, the lower floor be second independent component 2, the upper surface of second independent component 2 have two protruding structures, the lower surface has three protruding structures, detain the lower surface of first independent component 1 with the upper surface of second independent component 2 mutually and form the buttress, reserve reinforcing bar hole 13 on the second independent component 2, the upper surface of first independent component 1 is pre-buried to have steel sheet 11, passes pre-buried reinforcing bar hole 13 through vertically pre-buried reinforcing bar 12.
The raft bottom plate is further connected under the bottom plate foundation, as shown in fig. 19-22, and is composed of a ninth independent component 9 and a tenth independent component 10, wherein reserved invisible bolt holes 15 are formed in the ninth independent component 9, pre-buried bolts 16 corresponding to the reserved invisible bolt holes 15 are arranged on the tenth independent component 10, and the ninth independent component 9 and the tenth independent component 10 are connected through rabbets. The two large plates are connected by the bearing high-strength bolts 16 by adopting a tongue-and-groove design, so that the settlement of single components due to uneven foundation is avoided, and the overall stability of the structure is improved.
And buckling and connecting the two buttresses with the bottom plate foundation and the raft bottom plate to form a main transformer foundation.
According to the invention, the independent components are manufactured and maintained in advance respectively, the independent components are obviously reduced in weight due to the structure and connection relation, the independent components are convenient to transport and hoist and then are transported to a construction site for combination and installation, the efficiency of field work is improved, the construction procedures are reduced, the construction period is shortened, and the practicability is strong. The same layer and the upper and lower independent components are arranged in a crossed way, and physical occlusion is completely adopted; the cross arrangement of the bottom plates ensures that the stress is more uniform and reasonable, the supporting force of the bottom plates and the supporting columns is strong, and the main transformer foundation requirements of 110kV and above voltage levels can be met. And meanwhile, fewer bolts are connected, so that construction difficulty is reduced.
While the invention has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art to which the invention pertains without departing from the scope of the invention defined by the appended claims.
Claims (5)
1. The high-voltage mortise and tenon structure assembled main transformer foundation is characterized by comprising a plurality of independent components, wherein a plurality of protrusions are arranged on the surfaces of the independent components, and the independent components are spliced to form the mortise and tenon structure through the upper and lower cross engagement of the protrusions; the independent component is of a wide flat beam structure, and the ratio of the width to the height of the wide flat beam is 4-5:1;
the main transformer foundation comprises a bottom plate foundation and a plurality of buttresses which are arranged on the bottom plate foundation and meshed with the bottom plate foundation, and the buttresses are used for preventing the main transformer foundation from being laterally deformed; the bottom plate foundation and the buttress are composed of an upper independent component and a lower independent component which are mutually meshed;
the lower independent component of the bottom plate foundation comprises a seventh independent component, a sixth independent component, an eighth independent component, a sixth independent component and a seventh independent component which are sequentially and horizontally connected, the bottoms of the seventh independent component, the sixth independent component and the eighth independent component are of planar structures, the upper surfaces of the seventh independent component and the eighth independent component are respectively provided with three convex surfaces, steel plates are pre-embedded on the three convex surfaces of the seventh independent component, the two convex surfaces of the outer edge of the eighth independent component are pre-embedded with the steel plates, the sixth independent component is provided with two convex surfaces, and the seventh independent component and the eighth independent component are respectively staggered with the convex surfaces of the sixth independent component;
the upper independent component of the bottom plate foundation comprises a fifth independent component, a fourth independent component, a third independent component, a fourth independent component and a fifth independent component which are sequentially and horizontally connected, wherein the upper surface and the lower surface of the third independent component are respectively provided with two convex structures, the upper surface of the fourth independent component is respectively provided with two convex surfaces, the lower surface of the fourth independent component is provided with three convex surfaces, the upper surface of the fifth independent component is a plane, and the lower surface of the fifth independent component is provided with two convex structures; the convex surfaces of the third independent component and the fourth independent component are arranged in a staggered manner; the upper surfaces of the third independent component and the fifth independent component are respectively provided with embedded bars; the lower surfaces of the third independent component, the fourth independent component and the fifth independent component of the upper layer are respectively buckled with the upper surfaces of the seventh independent component, the sixth independent component and the eighth independent component of the lower layer in a crisscross manner, and meanwhile, the peripheral independent components are connected by using steel plate welding seams, so that the base of the bottom plate is more stable;
the buttress is composed of an upper layer and a lower layer, the upper layer is a first independent component, the upper surface of the first independent component is of a planar structure, and three protrusions are arranged on the lower surface of the first independent component; the lower layer is a second independent component, the upper surface of the second independent component is provided with two protruding structures, the lower surface of the second independent component is provided with three protruding structures, the lower surface of the first independent component is buckled with the upper surface of the second independent component to form a buttress, reinforcing steel bar holes are reserved on the first independent component and the second independent component, a steel plate is pre-buried on the upper surface of the first independent component, and the steel plate penetrates through the reserved reinforcing steel bar holes through vertical pre-buried reinforcing steel bars;
the lower part of the bottom plate foundation is provided with a raft bottom plate, the raft bottom plate consists of a first raft big plate and a second raft big plate, a reserved invisible bolt hole is formed in the first raft big plate, a pre-buried bolt corresponding to the reserved invisible bolt hole is arranged on the second raft big plate, and the first raft big plate and the second raft big plate are connected through a tongue-and-groove.
2. The high-voltage mortise and tenon structure assembled main transformer foundation according to claim 1, wherein the distance between the buttresses is consistent with the track gauge of a transformer to be erected.
3. The high-voltage mortise and tenon joint structure assembled main transformer foundation according to claim 1, wherein the independent component comprises a framework and a pouring layer on the framework, and the framework comprises a stirrup structure sleeved on an inner layer and an outer layer.
4. The high-voltage mortise and tenon joint structure assembled main transformer foundation according to claim 1, wherein the independent component is internally provided with invisible hanging nails.
5. The high-voltage mortise and tenon joint structure assembled main transformer foundation according to claim 1, wherein grouting holes are reserved at concave-convex engagement positions of the independent components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910577845.XA CN110172989B (en) | 2019-06-28 | 2019-06-28 | High-voltage mortise and tenon structure assembled main transformer foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910577845.XA CN110172989B (en) | 2019-06-28 | 2019-06-28 | High-voltage mortise and tenon structure assembled main transformer foundation |
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| Publication Number | Publication Date |
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| CN110172989A CN110172989A (en) | 2019-08-27 |
| CN110172989B true CN110172989B (en) | 2024-02-20 |
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| KR101181223B1 (en) * | 2012-05-08 | 2012-09-10 | 동양기업(주) | Prefabricated single concrete footing |
| CN106088134A (en) * | 2016-06-28 | 2016-11-09 | 浙江和勤通信工程有限公司 | Manual assembled type basis |
| CN207469279U (en) * | 2017-11-15 | 2018-06-08 | 四川电力设计咨询有限责任公司 | A kind of prefabricated special-shaped lath assembling type base |
| CN108729465A (en) * | 2018-05-31 | 2018-11-02 | 东北电力大学 | A kind of the assembled tower crane and its building method prefabricated based on modularization |
| CN208763055U (en) * | 2018-03-27 | 2019-04-19 | 温州远达电器有限公司 | General-purpose transformer basis |
| CN210482352U (en) * | 2019-06-28 | 2020-05-08 | 国网山西长治电力勘测设计有限公司 | Assembled main basis that becomes of high voltage mortise-tenon joint structure |
-
2019
- 2019-06-28 CN CN201910577845.XA patent/CN110172989B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101181223B1 (en) * | 2012-05-08 | 2012-09-10 | 동양기업(주) | Prefabricated single concrete footing |
| CN106088134A (en) * | 2016-06-28 | 2016-11-09 | 浙江和勤通信工程有限公司 | Manual assembled type basis |
| CN207469279U (en) * | 2017-11-15 | 2018-06-08 | 四川电力设计咨询有限责任公司 | A kind of prefabricated special-shaped lath assembling type base |
| CN208763055U (en) * | 2018-03-27 | 2019-04-19 | 温州远达电器有限公司 | General-purpose transformer basis |
| CN108729465A (en) * | 2018-05-31 | 2018-11-02 | 东北电力大学 | A kind of the assembled tower crane and its building method prefabricated based on modularization |
| CN210482352U (en) * | 2019-06-28 | 2020-05-08 | 国网山西长治电力勘测设计有限公司 | Assembled main basis that becomes of high voltage mortise-tenon joint structure |
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| CN110172989A (en) | 2019-08-27 |
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