CN211080271U - General type foundation structure of distribution device building of transformer substation - Google Patents
General type foundation structure of distribution device building of transformer substation Download PDFInfo
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- CN211080271U CN211080271U CN201921356235.9U CN201921356235U CN211080271U CN 211080271 U CN211080271 U CN 211080271U CN 201921356235 U CN201921356235 U CN 201921356235U CN 211080271 U CN211080271 U CN 211080271U
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Abstract
The application discloses general type foundation structure of distribution device building of transformer substation, general type foundation structure includes the raft with a plurality of first reinforcing bars and concrete placement, and arranges column pier on the raft, the column pier includes: the transverse steel frame is tiled and embedded in the raft plate, and the transverse steel frame is welded and fixed with the adjacent first steel bars in the raft plate; the supporting column is vertically inserted in the central area of the # -shaped steel frame, an accommodating groove for accommodating a part of the supporting column is formed in the central area of the # -shaped steel frame, the supporting column and the groove wall of the accommodating groove are welded and fixed, and a plurality of studs are welded on the peripheral surface of the supporting column; pier is strengthened to column base, pier is strengthened by a plurality of second reinforcing bars and concrete placement to the column base and wraps up the bottom of support column, the second reinforcing bar is including arranging many of support column periphery are indulged the muscle and are connected many are indulged the multichannel stirrup of muscle.
Description
Technical Field
The utility model relates to a building field especially relates to a general type foundation structure of distribution device building of transformer substation.
Background
In recent years, with the rapid development of economy and society of China, the construction of a power system is greatly developed, wherein the construction of a transformer substation is a key node in the construction of the power system, and the site selection of the transformer substation stipulated by the country accords with the land use policies related to the country and utilizes the original wasteland, sloping land and inferior land as much as possible. "this puts higher demands on the infrastructure of the substation due to poor geological conditions.
In the prior art, a transformer substation power distribution device building generally adopts a frame structure, the foundations adopted by the 220kV and 110kV power distribution device buildings are different and lack of flexibility, and column base loads at certain column piers are large due to equipment installation, and column base nodes and foundation structures with higher bearing capacity are needed.
SUMMERY OF THE UTILITY MODEL
The application discloses general type foundation structure of distribution device building of transformer substation, general type foundation structure includes the raft with a plurality of first reinforcing bars and concrete placement, and arranges column pier on the raft, the column pier includes:
the transverse steel frame is tiled and embedded in the raft plate, and the transverse steel frame is welded and fixed with the adjacent first steel bars in the raft plate;
the supporting column is vertically inserted in the central area of the # -shaped steel frame, an accommodating groove for accommodating a part of the supporting column is formed in the central area of the # -shaped steel frame, the supporting column and the groove wall of the accommodating groove are welded and fixed, and a plurality of studs are welded on the peripheral surface of the supporting column;
pier is strengthened to column base, pier is strengthened by a plurality of second reinforcing bars and concrete placement to the column base and wraps up the bottom of support column, the second reinforcing bar is including arranging many of support column periphery are indulged the muscle and are connected many are indulged the multichannel stirrup of muscle.
Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.
Preferably, the plurality of longitudinal ribs extend downwards and have the following connection modes:
the first method is as follows: burying the raft plate at the bottom of the raft plate;
the second method comprises the following steps: and is welded with the # -shaped steel frame.
Preferably, the longitudinal bars extend downwards to the lower part of the # -shaped steel frame.
Preferably, a plurality of longitudinal bars extend downwards, and a plurality of longitudinal bars are welded with the top surface of the # -shaped steel frame after being bent at the meeting position of the # -shaped steel frame.
Preferably, the first steel bars are woven into steel bar meshes, the steel bar meshes at least comprise an upper mesh close to the top surface of the raft and a lower mesh close to the bottom surface of the raft, and the # -shaped steel frame is accommodated between the upper mesh and the lower mesh.
Preferably, the # -shaped steel frame comprises:
the transverse channel steel is provided with two transverse channel steel in parallel and arranged back to form the containing groove;
the longitudinal channel steel is arranged in groups, two longitudinal channel steel groups are arranged in each group side by side, and the two sides of the transverse channel steel are symmetrically welded with two groups.
Preferably, the longitudinal length and the transverse length of the # -shaped steel frame are equal.
Preferably, the vertical and horizontal both sides of # -shaped steel frame all are equipped with levelling device, levelling device includes:
the leveling plate is connected with the # -shaped steel frame;
the leveling screw rod penetrates through the leveling plate;
the supporting plate is arranged at the bottom of the leveling screw rod;
the upper leveling nut is in threaded fit with the leveling screw rod, and the lower surface of the upper leveling nut abuts against the leveling plate;
and the lower leveling nut is in threaded fit with the leveling screw rod, and the upper surface of the lower leveling nut abuts against the leveling plate.
Preferably, the leveling plates in the longitudinal direction of the # -shaped steel frame are welded between the longitudinal channel steels, and the leveling plates in the transverse direction of the # -shaped steel frame are welded between the transverse channel steels.
Preferably, the leveling screw penetrates through the lower net piece, and the supporting plate and the leveling plate are respectively positioned on two sides of the lower net piece.
The technical scheme disclosed by the application at least comprises the following beneficial technical effects:
1, selecting a raft foundation form, and having strong integrity and small uneven settlement;
2, the raft foundation scheme has strong adaptability to the field, and the raft foundation is applicable to both natural foundations and composite foundations and pile foundations;
3, the raft reinforcing bars can effectively resist the bending moment of the bottom plate by combining the hidden beams and the uniformly distributed reinforcing bars;
4, the foundation surface can be smooth by adopting the structural form of the # -shaped steel frame with the cross steel beams embedded under the columns, so that the installation of equipment on other ground is facilitated;
5, because the upper steel column is directly connected with the # -shaped steel frame embedded into the raft plate, the force transmission of the pier is more direct and effective (compared with the original externally-wrapped column base, the force transmission of the steel column to the externally-wrapped reinforced concrete and then to the foundation by the externally-wrapped reinforced concrete column is indirect in force transmission); the anti-impact shear bearing capacity of the pier is improved by 15% in a structural form that the steel frame is embedded under the column; the bending resistance and shearing resistance bearing capacity are improved; because the steel beams are made of elastic plastic materials, the steel beams are buried in the reinforced concrete raft plate, so that the structural ductility of the column pier can be improved, and the risk of brittle sudden damage is reduced;
6, the column base structure (namely the column pier) scheme in the universal foundation structure has simple structure and convenient construction. The # -shaped steel frame and the column bottom part can be directly processed in a factory, a leveling device is adopted on site to carry out positioning and leveling, and meanwhile, the # -shaped steel frame and the column bottom part can be used as a support of reinforcing steel bars on the upper portion of a raft, so that construction is facilitated.
7, general basis, because 220kV distribution device building and 110kV distribution device building adopt general basis, the raft board size is the same, and the arrangement of reinforcement is the same, only the post position is different, can reduce design work load, and convenient construction is prepareeed material.
The advantageous technical effects of the specific structure will be specifically explained in the detailed description.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a universal infrastructure implemented in a 220KV substation;
FIG. 2 is a schematic view of the pillar structure of FIG. 1;
FIG. 3 is a schematic structural view of the steel derrick of FIG. 2;
fig. 4 is a schematic structural diagram of the leveling device in fig. 3.
The reference numerals in the figures are illustrated as follows:
11. a first reinforcing bar; 12. a second reinforcing bar; 121. longitudinal ribs; 122. hooping; 2. a raft plate; 3. pillar piers; 31. a well-shaped steel frame; 311. transverse channel steel; 312. longitudinal channel steel; 313. an accommodating groove; 33. a support pillar; 331. a stud; 34. column foot reinforcing piers; 35. a leveling device; 351. leveling; 352. leveling screw rods; 353. a support plate; 354. an upper leveling nut; 355. the leveling nut is lowered.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 4, the application discloses general type foundation structure of transformer substation's distribution device building, general type foundation structure includes raft 2 with a plurality of first reinforcing bars 11 and concrete placement, and arranges pier 3 on raft 2, pier 3 includes:
the transverse steel frame 31 is paved and embedded in the raft plate 2, and the transverse steel frame 31 is welded and fixed with the adjacent first reinforcing steel bars 11 in the raft plate 2;
a supporting column 33 (shown in the figure as an i-steel), wherein the supporting column 33 is vertically inserted into a central area of the cross-shaped steel frame 31, an accommodating groove 313 for accommodating a part of the supporting column 33 is formed in the central area of the cross-shaped steel frame 31, the supporting column 33 and the groove wall of the accommodating groove 313 are welded and fixed, and a plurality of studs 331 are welded on the outer circumferential surface of the supporting column 33;
the column base reinforcing pier 34 is formed by pouring a plurality of second reinforcing steel bars 12 and concrete and wrapping the second reinforcing steel bars 12 at the bottom of the supporting column 33, and the second reinforcing steel bars 12 comprise a plurality of longitudinal bars 121 arranged on the periphery of the supporting column 33 and a plurality of stirrups 122 connected with the longitudinal bars 121.
Only one of the pier 3 is shown in fig. 1, and the remaining positions are omitted. According to the technical scheme disclosed by the application, the force transfer of the pier 3 is more direct and effective (compared with the original externally-coated column base, the force transfer of the steel column is transmitted to the externally-coated reinforced concrete and then transmitted to the foundation by the externally-coated reinforced concrete column, and the force transfer is indirect) through the direct connection of the second steel bars 12 in the # -shaped steel frame 31, the support column 33 and the column base reinforcing pier 34; the anti-shearing bearing capacity of the pier 3 is improved by 15 percent by adopting a structural form of embedding the steel frame 31 shaped like a Chinese character 'jing' under the column.
Meanwhile, the scheme of the column base structure (namely the column pier 3) is simple in structure and convenient to construct. The # -shaped steel frame 31 and the column bottom part can be directly processed in a factory, and the leveling device 35 is used for positioning and leveling on site, and meanwhile, the # -shaped steel frame can be used as a support of reinforcing steel bars on the upper portion of the raft 2, so that construction is facilitated.
The technical scheme disclosed in the application optimizes the stress performance of a single column pier 3, optimizes the installation and construction process of the column pier 3 and greatly improves the construction efficiency.
In one embodiment, the longitudinal ribs 121 extend downward and have the following connection modes:
the first method is as follows: burying the raft plate to the bottom of the raft plate 2;
the second method comprises the following steps: welded with the # -shaped steel frame 31.
In an actual setting, multiple modes may exist simultaneously. For example, in the embodiment shown in the figures, the plurality of longitudinal bars 121 extend downward, the longitudinal bars 121 meeting the cross-shaped steel frame 31 are welded to the top surface of the cross-shaped steel frame 31 after being bent at the meeting positions, the longitudinal bars 121 meeting the first steel bars 11 are welded to the first steel bars 11 after being bent at the meeting positions, and the rest of the longitudinal bars are buried in the bottom of the raft 2.
Of course, only one or both of the connections may be present.
In one embodiment, the plurality of longitudinal ribs 121 extend downward to below the cross steel frame 31. In the present embodiment, the longitudinal rib 121 interfering with other components extends to the lower side of the cross steel frame 31 after bypassing the interference device.
In one embodiment, the longitudinal ribs 121 extend downward, and the longitudinal ribs 121 are bent at positions meeting the cross-shaped steel frame 31 and then welded to the top surface of the cross-shaped steel frame 31. In this embodiment, the longitudinal ribs 121 that originally do not meet the steel frame 31 may be bent and then welded to the steel frame 31.
Each connection mode can be implemented as required, and it is necessary to ensure the strength of the pier 3 and the convenience of installation in principle.
The stress of the pier 3 is finally transmitted to the raft 2 after being conducted, in one embodiment, the first steel bars 11 are woven into steel bar meshes, the steel bar meshes at least comprise upper meshes close to the top surface of the raft 2 and lower meshes close to the bottom surface of the raft 2, and the cross steel frame 31 is accommodated between the upper meshes and the lower meshes.
Go up the net piece and form centre gripping space restraint # -shaped steel frame 31 with lower net piece to connect into the rigid node with pier 3 and raft 2, improve the holistic performance of general type foundation structure.
The mechanical performance of the pier 3 is also affected by the connection design form of the cross steel frame 31, and in an embodiment, the cross steel frame 31 includes:
two transverse channel beams 311 are arranged side by side and arranged back to form the containing groove 313;
the longitudinal channel steel 312 is arranged in groups, two longitudinal channel steel channels are arranged in each group side by side, and two longitudinal channel steel channels 311 are symmetrically welded on two sides of each group.
The longitudinal channel 312 and the transverse channel 311 are welded to form the cross steel frame 31 for convenience of construction, and in an embodiment, the longitudinal length and the transverse length of the cross steel frame 31 are equal.
The longitudinal and transverse lengths of the cross steel frame 31 are equal to each other to provide a mechanical performance with the same direction for the pier 3, and in a specific implementation, the longitudinal and transverse lengths of the cross steel frame 31 may have a slight error due to construction errors and the like, and are not necessarily exactly equal.
During the construction of the general-purpose foundation structure, errors accumulated at various positions need to be released, in an embodiment, leveling devices 35 are respectively arranged at the longitudinal side and the transverse side of the # -shaped steel frame 31, and each leveling device 35 includes:
the leveling plate 351 is connected with the # -shaped steel frame 31;
a leveling screw 352 penetrating the leveling plate 351;
a support plate 353 disposed at the bottom of the leveling screw 352;
an upper leveling nut 354 which is screwed on the leveling screw 352 and the lower surface of which abuts against the leveling plate 351;
and a lower leveling nut 355 which is screwed on the leveling screw 352 and whose upper surface abuts against the leveling plate 351.
The leveling device 35 can adjust the levelness of the # -shaped steel frame 31 relative to the raft 2 by adjusting the relative positions of the upper leveling nut 354 and the lower leveling nut 355, thereby eliminating errors and providing stable performance. The design of levelling device 35 makes the steel construction production and the building site construction of pier 3 can be independency, and the steel construction of pier 3 can be transported to the building site construction after mill's batch production, improves the efficiency of construction greatly.
In one embodiment, the leveling plates 351 in the longitudinal direction of the cross steel frame 31 are welded between the longitudinal channel bars 312, and the leveling plates 351 in the transverse direction of the cross steel frame 31 are welded between the transverse channel bars 311.
Leveling plate 351 sets up between the steelframe of well style of calligraphy steelframe 31, can improve intensity, further provides better mechanical properties for the pier after pouring the completion. Specifically, in an embodiment, the leveling screw 352 penetrates through the lower mesh, and the supporting plate 353 and the leveling plate 351 are respectively located at two sides of the lower mesh.
The leveling device 35 can also realize additional functions besides leveling, and in this embodiment, after the concrete is filled, the leveling screw 352 plays a role of hooking a rib, so as to further provide a stable connection effect for the cross steel frame 31.
In the specific parameter selection, the raft 2 of the general foundation structure is a flat plate, the thickness is not less than 500mm, the top and the bottom of the raft 2 at the axis are densely arranged with steel bars as hidden beams, the width of the hidden beams is not less than 1200mm, and the bottom and the top of other parts are provided with uniformly distributed steel bars. Because the hidden beams of the encrypted steel bars are arranged below the 220kv power distribution device tower and the 110kv power distribution device tower, the universal foundation structure can be used for two power distribution device buildings.
The technical scheme disclosed by the application can effectively enhance the mechanical property of the pier through calculation and field exploration, and the calculation process is as follows:
taking the center pillar as an example:
column section 1000mmx1000mm
Concrete grade C35
The thickness of the plate is 500 mm. The thickness of the protective layer is 50 mm.
Height h0 is calculated as 435mm
The section of the middle steel column is HW400x400
1. The bearing capacity of the bottom plate without increasing the # -shaped steel frame is calculated according to the concrete structure design specification GB 50011-2010:
punching resistance and bearing capacity of the bottom plate:
Fel＝0.7βhηumh0
βh＝1.0
βs＝2
αs＝40
η＝Min{η1,η2}＝1.0
um＝4×(1000+h0)＝5740mm
Fel＝0.7βhftηumh0＝0.7×1.0×1.57×1.0×5740×435＝2744kN
2. the bearing capacity after the increase of the # -shaped steel frame is calculated according to the design rule of unbonded prestressed concrete structures JGJ 92-2016:
the section of the rear cross-shaped steel frame of the shear-resistant cross-shaped steel frame is increased by adopting a [36b ]
The length of the # -shaped steel frame extends out of the section of the column pier by 1000 mm. The load bearing capacity can be adjusted by adjusting the overhang length, and if the load bearing capacity of 1200mm is increased by 28%, the load bearing capacity is increased by 15%, so 1000mm is used.
Punching resistance and bearing capacity of the bottom plate:
F′el＝0.6ftηumh0＝0.6×1.57×1.0×7773×435＝3185kN
the bearing capacity is increased by 16 percent
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a general type foundation structure of distribution device building of transformer substation, its characterized in that, general type foundation structure includes the raft with a plurality of first reinforcing bars and concrete placement, and arranges pier on the raft, the pier includes:
the transverse steel frame is tiled and embedded in the raft plate, and the transverse steel frame is welded and fixed with the adjacent first steel bars in the raft plate;
the supporting column is vertically inserted in the central area of the # -shaped steel frame, an accommodating groove for accommodating a part of the supporting column is formed in the central area of the # -shaped steel frame, the supporting column and the groove wall of the accommodating groove are welded and fixed, and a plurality of studs are welded on the peripheral surface of the supporting column;
pier is strengthened to column base, pier is strengthened by a plurality of second reinforcing bars and concrete placement to the column base and wraps up the bottom of support column, the second reinforcing bar is including arranging many of support column periphery are indulged the muscle and are connected many are indulged the multichannel stirrup of muscle.
2. The universal base structure as claimed in claim 1, wherein said plurality of longitudinal bars extend downwardly and have the following connections:
the first method is as follows: burying the raft plate at the bottom of the raft plate;
the second method comprises the following steps: and is welded with the # -shaped steel frame.
3. The universal substructure of claim 1 wherein said plurality of longitudinal bars extend downwardly below said cross-steel frame.
4. The universal substructure of claim 1 wherein said plurality of longitudinal bars extend downwardly and are welded to the top surface of said cross-frame after being bent at the location where said plurality of longitudinal bars meet said cross-frame.
5. The universal foundation structure of claim 1, wherein the first steel bars are woven into a steel bar mesh, the steel bar mesh at least comprises an upper mesh close to the top surface of the raft and a lower mesh close to the bottom surface of the raft, and the cross steel frame is accommodated between the upper mesh and the lower mesh.
6. The universal infrastructure according to claim 5, wherein the cross steel frame comprises:
the transverse channel steel is provided with two transverse channel steel in parallel and arranged back to form the containing groove;
the longitudinal channel steel is arranged in groups, two longitudinal channel steel groups are arranged in each group side by side, and the two sides of the transverse channel steel are symmetrically welded with two groups.
7. The universal infrastructure as in claim 6, wherein the cross steel frame is of equal length in the longitudinal and transverse directions.
8. The universal foundation structure of claim 7, wherein leveling devices are provided at both longitudinal and lateral sides of the cross steel frame, the leveling devices comprising:
the leveling plate is connected with the # -shaped steel frame;
the leveling screw rod penetrates through the leveling plate;
the supporting plate is arranged at the bottom of the leveling screw rod;
the upper leveling nut is in threaded fit with the leveling screw rod, and the lower surface of the upper leveling nut abuts against the leveling plate;
and the lower leveling nut is in threaded fit with the leveling screw rod, and the upper surface of the lower leveling nut abuts against the leveling plate.
9. The universal infrastructure as claimed in claim 8, wherein the longitudinal leveling plates of the cross frame are welded between the longitudinal channels and the transverse leveling plates of the cross frame are welded between the transverse channels.
10. The universal substructure of claim 9 wherein said leveling screws are threaded through said lower mesh, said support plates and leveling plates being positioned on either side of said lower mesh.
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| CN201921356235.9U CN211080271U (en) | 2019-08-20 | 2019-08-20 | General type foundation structure of distribution device building of transformer substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644519A (en) * | 2019-08-20 | 2020-01-03 | 浙江大学 | General type foundation structure of distribution device building of transformer substation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644519A (en) * | 2019-08-20 | 2020-01-03 | 浙江大学 | General type foundation structure of distribution device building of transformer substation |
| CN110644519B (en) * | 2019-08-20 | 2024-04-30 | 浙江大学 | General foundation structure of transformer substation distribution device building |
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