阅读说明：本技术 一种变电站配电装置楼的基础结构 (Foundation structure of transformer substation distribution device building ) 是由 张�浩 杜振东 程鹏 朱云祥 高亚栋 方瑜 俞辰颖 施首健 杨杰 屠锋 于 2019-08-20 设计创作，主要内容包括：本申请公开了一种变电站配电装置楼的基础结构,基础结构包括用若干根第一钢筋和混凝土浇筑的筏板,以及布置在筏板上的柱墩,柱墩包括：十字钢架,十字钢架平铺埋设在筏板内,十字钢架与筏板中邻近的第一钢筋焊接固定；十字固定座,十字固定座焊接固定在十字钢架顶面的中心区域；箱型柱,箱型柱立置固定在十字钢架的顶面的中心区域,且箱型柱的底缘带有与十字固定座相配合的卡槽,箱型柱的内部为混凝土填灌区,箱型柱的外周面上焊接有多根栓钉；柱脚加强墩,柱脚加强墩由若干根第二钢筋和混凝土浇筑、并包裹在箱型柱的底部,第二钢筋包括排布在箱型柱外周的多根纵筋以及连接多根纵筋的多道箍筋。(The application discloses foundation structure of distribution device building of transformer substation, foundation structure include with the raft board of a plurality of first reinforcing bars and concrete placement to and arrange the pier on the raft board, the pier includes: the cross steel frame is tiled and embedded in the raft plate, and the cross steel frame is welded and fixed with the adjacent first reinforcing steel bars in the raft plate; the cross fixing seat is welded and fixed in the central area of the top surface of the cross steel frame; the box-type column is vertically fixed in the central area of the top surface of the cross steel frame, the bottom edge of the box-type column is provided with a clamping groove matched with the cross fixing seat, a concrete filling area is arranged inside the box-type column, and a plurality of studs are welded on the outer peripheral surface of the box-type column; pier is strengthened to the column base, and pier is strengthened by a plurality of second reinforcing bars and concrete placement to wrap up in the bottom of box post, the second reinforcing bar is including arranging many vertical bars and the multichannel stirrup of connecting many vertical bars in box post periphery.)

1. The utility model provides a foundation structure of distribution device building of transformer substation, its characterized in that, 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 cross steel frame is tiled and embedded in the raft plate, and the cross steel frame is welded and fixed with the adjacent first reinforcing steel bars in the raft plate;

the cross fixing seat is welded and fixed in the central area of the top surface of the cross steel frame;

the box-type column is vertically fixed in the central area of the top surface of the cross steel frame, the bottom edge of the box-type column is provided with a clamping groove welded with the cross fixing seat, a concrete filling area is arranged inside the box-type column, and a plurality of studs are welded on the outer peripheral surface of the box-type column;

pier is strengthened to the column base, pier is strengthened by a plurality of second reinforcing bars and concrete placement, and parcel is in to the column base the bottom of box column, the second reinforcing bar is including arranging many of box column periphery are indulged the muscle and are connected many are indulged the multichannel stirrup of muscle.

2. The substructure of claim 1, wherein the plurality of longitudinal bars extend downward 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 welding with a cross steel frame.

3. The substructure of claim 1, wherein the plurality of longitudinal bars extend downwardly below the cross-steel frame.

4. The substructure of claim 1, wherein the plurality of longitudinal bars extend downward and are welded to the top surface of the cross steel frame after bending at the locations where the longitudinal bars meet the cross steel frame.

5. The foundation structure as claimed in claim 1, wherein the cross fixing seat comprises two fixing steel plates arranged vertically, and the first steel bar is welded with the vertical surface of the fixing steel plate after being bent at the position meeting the fixing steel plates.

6. The substructure of claim 1, wherein the cross mounts extend both longitudinally and transversely outside the box columns.

7. the 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.

8. the substructure of claim 7, wherein the two longitudinal steels of the cross steel frame are symmetrically welded to both sides of a transverse steel, and the longitudinal and transverse lengths of the cross steel frame are equal.

9. the substructure of claim 8, 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 cross 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.

10. the infrastructure of claim 9, wherein the leveling screw passes through the lower mesh, and the support plate and the leveling plate are respectively located on both sides of the lower mesh.

Technical Field

the invention relates to the field of buildings, in particular to a foundation structure of a substation power distribution device building.

Background

in recent years, various industrial and civil buildings have been greatly developed along with the formation of intensive urbanization development strategy in China. In order to make full use of the performance of the materials, a steel pipe concrete combined structure system is introduced on the basis of the original reinforced concrete structure system, and the steel pipe concrete makes use of the mutual restriction of two materials of a steel pipe and concrete in the stress process, namely the restriction of the steel pipe on the concrete, so that the concrete is in a three-dimensional stress state, the strength of the concrete is improved, the brittleness is reduced, and the plasticity and the toughness are greatly improved; meanwhile, due to the deformation of the concrete, the steel pipe is also in a complex stress state, and the stability of the steel pipe wall is enhanced.

at present, the research on beam column nodes of the concrete filled steel tube upper structure is more, the column base form of a steel structure is still used for foundation column base nodes, and the design of a column base foundation is not carried out aiming at the characteristics of the concrete filled steel tube structure.

more importantly, the site selection of the transformer substation stipulated by the state is required to meet the land use policies related to the state, and the original wasteland, sloping land and inferior land are utilized as much as possible. "this puts higher demands on the infrastructure of the substation due to poor geological conditions.

the inventor finds that the raft foundation has good field applicability, can make full use of the bearing capacity of field soil, and is very suitable for the foundation with poor geological conditions. The foundation form of the pier and raft is various structure forms which are applicable because of flexible arrangement. The transformer substation power distribution device building generally adopts a frame structure, and due to the installation of equipment, the load of certain column bases is large, and column base nodes and foundation structures with higher bearing capacity are needed.

Disclosure of Invention

the application discloses foundation structure of distribution device building of transformer substation, 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 cross steel frame is tiled and embedded in the raft plate, and the cross steel frame is welded and fixed with the adjacent first reinforcing steel bars in the raft plate;

the cross fixing seat is welded and fixed in the central area of the top surface of the cross steel frame;

The box-type column is vertically fixed in the central area of the top surface of the cross steel frame, the bottom edge of the box-type column is provided with a clamping groove matched with the cross fixing seat, a concrete filling area is arranged inside the box-type column, and a plurality of studs are welded on the outer peripheral surface of the box-type column;

Pier is strengthened to the column base, pier is strengthened by a plurality of second reinforcing bars and concrete placement, and parcel is in to the column base the bottom of box column, the second reinforcing bar is including arranging many of box 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 welding with a cross steel frame.

Preferably, the longitudinal bars extend downwards to the lower part of the cross steel frame.

Preferably, the longitudinal ribs extend downwards, and the longitudinal ribs are welded with the top surface of the cross steel frame after being bent at the meeting position of the cross steel frame.

Preferably, the cross fixing seat comprises two fixing steel plates which are vertically arranged, and the first steel bar is welded with the vertical face of each fixing steel plate after being bent at the position where the first steel bar meets the fixing steel plates.

Preferably, the cross fixing seat extends to the outer side of the box-type column in the longitudinal direction and the transverse direction.

preferably, the first steel bars are woven into steel bar meshes, the steel bar meshes at least comprise upper steel bar meshes close to the top surface of the raft and lower steel bar meshes close to the bottom surface of the raft, and the cross steel frame is accommodated between the upper steel bar meshes and the lower steel bar meshes.

Preferably, the two longitudinal steels of the cross steel frame are symmetrically welded on two sides of one transverse steel, and the longitudinal length and the transverse length of the cross steel frame are equal.

preferably, the vertical and horizontal both sides of cross steelframe all are equipped with levelling device, levelling device includes:

the leveling plate is connected with the cross 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 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 structural form of a cross steel frame with cross steel beams embedded under the columns is adopted, so that the surface of the foundation can be smooth, and the installation of equipment on other ground is facilitated;

5, because the upper steel column is directly connected with the cross 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 is transmitted to externally-wrapped reinforced concrete and then transmitted to a foundation by the externally-wrapped reinforced concrete column, and the force transmission is indirect); the anti-impact shear bearing capacity of the pier is improved by 15% in a structural form that a cross 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 foundation structure is simple in structure and convenient to construct. The cross steel frame and the column bottom part can be directly processed in a factory, a leveling device is adopted on site to position and level, and meanwhile, the cross 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 an infrastructure implemented in a 220KV substation;

FIG. 2 is a schematic view of the pillar structure of FIG. 1;

FIG. 3 is a schematic view of the cross steel frame structure shown in 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 cross steel frame; 311. transverse steel; 312. longitudinal steel; 32. a cross-shaped fixed seat; 33. a box column; 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 clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 present application discloses a foundation structure of a substation power distribution device building, the foundation structure including a raft 2 cast with a plurality of first rebars 11 and concrete, and a pier 3 arranged on the raft 2, the pier 3 including:

The cross steel frame 31 is paved and embedded in the raft plate 2, and the cross steel frame 31 is welded and fixed with the adjacent first reinforcing steel bars 11 in the raft plate 2;

The cross fixing seat 32 is fixedly welded in the central area of the top surface of the cross steel frame 31;

The box-type column 33 is vertically fixed in the central area of the top surface of the cross steel frame 31, a clamping groove (not shown) welded with the cross fixing seat 32 is formed in the bottom edge of the box-type column 33 (welded with the cross fixing seat), a concrete filling area is arranged inside the box-type column 33, and a plurality of studs 331 are welded on the outer peripheral surface of the box-type column 33;

pier 34 is strengthened to the column base, pier 34 is strengthened by a plurality of second reinforcing bars 12 and concrete placement, and wraps up in the bottom of box post 33 to the column base, and second reinforcing bar 12 is including arranging many vertical reinforcement 121 and the multichannel stirrup 122 of connecting many vertical reinforcement 121 in box post 33 periphery.

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 cross steel frame 31, the cross fixed seat 32, the box-shaped column 33 and the second steel bars 12 in the column base reinforcing pier 34 are directly connected with one another, so that the force transfer of the column pier 3 is more direct and effective (compared with the original externally-coated column base, the force transfer of a steel column is transmitted to externally-coated reinforced concrete, and then is transmitted to a foundation by an externally-coated reinforced concrete column, and the force transfer is not direct); the structural form of embedding the cross steel frame 31 under the column is adopted to improve the anti-impact shear bearing capacity of the column pier 3 by 15 percent.

meanwhile, the scheme of the column base structure (namely the column pier 3) is simple in structure and convenient to construct. The cross steel frame 31 and the column bottom part can be directly processed in a factory, the leveling device 35 is adopted on site to carry out positioning and leveling, and meanwhile, the cross steel frame can be used as a support of reinforcing steel bars on the upper portion of the raft 2, and 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 plurality of longitudinal ribs 121 extend downward and have the following connection modes:

the first method is as follows: burying the raft plate at the bottom of the raft plate 2;

the second method comprises the following steps: welded with the cross steel frame 31.

In an actual setting, multiple modes may exist simultaneously. For example, in the embodiment shown in the figures, the longitudinal bars 121 extend downward, the longitudinal bars 121 meeting the cross steel frame 31 are welded to the top surface of the cross steel frame 31 after being bent at the meeting position, the longitudinal bars 121 meeting the first steel bars 11 are welded to the first steel bars 11 after being bent at the meeting position, and the rest are buried to the bottom of the raft 2.

Of course, only one or both of the connections may be present.

In one embodiment, the longitudinal ribs 121 extend downward to below the cross steel frame 31. In the present embodiment, the longitudinal ribs 121 interfering with other components extend below the cross steel frame 31 after bypassing the interference device.

in an embodiment, the plurality of longitudinal ribs 121 extend downward, and the plurality of longitudinal ribs 121 are bent at the meeting position with the cross steel frame 31 and then welded to the top surface of the cross steel frame 31. In this embodiment, the longitudinal ribs 121 that do not meet the cross steel frame 31 originally can be bent and then welded to the cross 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 stabilization of the box column 33 is provided by the cross fixing 32 in addition to the column foot reinforcing piers 34. In one embodiment, the cross-shaped fixing seat 32 comprises two fixing steel plates vertically arranged, and the first steel bar 11 is welded to the vertical surface of the fixing steel plate after being bent at the position meeting the fixing steel plates.

the first steel bar 11 and the vertical face of the fixed steel plate are welded to provide a support for preventing the box column 33 from toppling over, so that the stability of the cross-shaped fixed seat 32 is improved.

From the analysis of mechanics principle, the bigger the size of cross fixing base 32, the better the stability of box column 33. However, from a practical standpoint, there are generally limitations on the size of the box-type column 33, and therefore in one embodiment, both the longitudinal and transverse directions of the cross mount 32 extend outside the box-type column 33. The mechanical property of the cross fixing seat 32 is improved by enlarging the connection projection area of the cross fixing seat 32 and the cross steel frame 31.

The stress of the pier 3 is finally transmitted to the raft 2 after being transmitted, in one embodiment, the first steel bars 11 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 2 and a lower mesh close to the bottom surface of the raft 2, and the cross steel frame 31 is accommodated between the upper mesh and the lower mesh.

Go up the net piece and form centre gripping space restraint cross steel frame 31 with lower net piece to connect into the rigid node with pier 3 and raft 2, improve the holistic performance of foundation structure.

The mechanical performance of the pier 3 is also affected by the connection design form of the cross steel frame 31, in an embodiment, two longitudinal steels 312 of the cross steel frame 31 are symmetrically welded on two sides of one transverse steel 311, and the longitudinal and transverse lengths of the cross steel frame 31 are equal.

The longitudinal steel 312 and the transverse steel 311 are welded to form the cross steel frame 31 for convenience of construction, the length of the cross steel frame 31 in the longitudinal direction and the length of the cross steel frame 31 in the transverse direction are equal to provide a mechanical performance consistent in all directions for the column piers 3, and in a specific implementation, the length of the cross steel frame 31 in the longitudinal direction and the length of the cross steel frame 31 in the transverse direction may be slightly different due to construction errors and the like, and are not necessarily strictly equal.

During the construction of the foundation structure, errors accumulated everywhere need to be released, in one embodiment, leveling devices 35 are disposed on both longitudinal and transverse sides of the cross steel frame 31, and each leveling device 35 includes:

The leveling plate 351 is connected with the cross 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 cross 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.

The leveling device 35 can also realize additional functions besides leveling, in one embodiment, the leveling screw 352 penetrates through the lower net sheet, and the supporting plate 353 and the leveling plate 351 are respectively located at two sides of the lower net sheet.

in this embodiment, the supporting plate 353 is disposed on the top surface of the foundation, and after the concrete is filled, the leveling screw 352 functions as a hook rib, so as to further provide a stable connection effect for the cross steel frame 31.

on the specific parameter selection, raft 2 of foundation structure is flat, and thickness is no less than 500 millimeters, and raft 2 top and bottom densely arranged reinforcing bar of axis department are as the hidden beam, and the hidden beam width is no less than 1200 millimeters, and other part bottom and top configuration equipartition reinforcing bar. 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 foundation structure can be used for two types of 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

1. The bearing capacity of the bottom plate without the addition of the cross steel frame is calculated according to the concrete structure design code GB 50011-2010:

Punching resistance and bearing capacity of the bottom plate:

F＝0.7βηuh

β＝1.0

β＝2

α＝40

η＝Min{η,η}＝1.0

u＝4×(1000+h)＝5740mm

F＝0.7βfηuh＝0.7×1.0×1.57×1.0×5740×435＝2744kN

2. after the cross steel frame is added, the bearing capacity is calculated according to the design rule of unbonded prestressed concrete structures JGJ 92-2016:

the cross section of the cross steel frame is H350x250x9x14 after the shear-resistant cross steel frame is added

the length of the cross steel frame extends out of the column section by 1200 mm.

Punching resistance and bearing capacity of the bottom plate:

F′＝0.6fηuh＝0.6×1.57×1.0×7918×435＝3244kN

the bearing capacity is increased by 18 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 express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.