CN215715466U - Steel structure assembly type root key foundation for power transmission line - Google Patents
Steel structure assembly type root key foundation for power transmission line Download PDFInfo
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- CN215715466U CN215715466U CN202122172753.9U CN202122172753U CN215715466U CN 215715466 U CN215715466 U CN 215715466U CN 202122172753 U CN202122172753 U CN 202122172753U CN 215715466 U CN215715466 U CN 215715466U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 164
- 239000010959 steel Substances 0.000 title claims abstract description 164
- 230000005540 biological transmission Effects 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 claims abstract description 16
- 239000002689 soil Substances 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 52
- 238000009412 basement excavation Methods 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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Abstract
The utility model discloses a steel structure assembly type root key foundation for a power transmission line, which comprises a foundation bottom plate and a foundation support; the foundation bottom plate comprises bottom section steel, root key connection section steel, middle section steel and a root key; the bottom section steels are arranged at intervals, and the middle section steels are arranged at intervals and fixedly connected with the tops of the dry bottom section steels in a staggered manner; the plurality of key-connected section steels are vertically staggered and fixed to form two layers, the plurality of key-connected section steels on each layer are arranged at intervals, the lower layer of key-connected section steels are fixedly connected with the tops of the middle section steels in a staggered manner, and the upper layer of key-connected section steels are fixedly connected with the bottoms of the basic supports; root keys on each layer are connected with the end parts of the profile steels and are fixedly connected with the root keys, and the root keys extend into an original soil body around the foundation pit. The foundation of the utility model is composed of all spliced steel members, has light weight, is convenient for transportation and field installation, and can realize the purpose of quick, convenient and economic construction.
Description
Technical Field
The utility model belongs to the field of assembly type foundations of power transmission lines, and particularly relates to a steel structure assembly type root key foundation for a power transmission line.
Background
The existing general design and the commonly-used large-excavation metal plate column assembly type foundation are suitable for tower positions with gentle terrains, the foundation type mainly utilizes excavation disturbance to backfill soil bodies to bear uplift load, original soil body strength cannot be fully utilized, additionally, due to the complex structure, the backfill soil cannot be fully tamped, the problem that the foundation uplift bearing capacity is low is caused, during actual application, a concrete pouring package bottom plate is additionally arranged above the bottom plate, and the concrete operation process, the construction difficulty and the construction period are increased. In addition, the existing foundation is complex in arrangement and force transmission form, when foundation acting force is large, the number and weight of components are increased along with the increase of foundation burial depth, and difficulties are brought to transportation and field operation. For the excavation plate column type foundation, a foundation form capable of exerting the original state soil in a large area to carry out uplift bearing does not exist, in addition, the traditional plate column type foundation adopts a large excavation operation mode, large-area ecological damage can be caused when the traditional plate column type foundation is used in a complex mountain land topography, and particularly, the foundation with large acting force is not suitable for adopting the foundation form. The strength of undisturbed soil can be fully exerted, the uplift bearing is realized, and the plate column foundation capable of carrying out small-scale mountain excavation operation is still in the technical blank at present. Generally, the existing assembled excavation plate column foundation has a plurality of problems, and particularly, in the face of the requirements of large acting force, complex terrain and quick and convenient construction, certain differences exist between the actual use and the targets of light weight, quickness, convenience and adaptability to various terrains. Therefore, the research and development of the fabricated foundation which has strong anti-pulling bearing capacity, wide applicability and convenient construction is of great significance to the development of the power transmission line emergency repair foundation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that a common large-excavation metal plate column assembly type foundation in the prior art cannot fully utilize the strength of original soil, backfill cannot be fully tamped, the earthwork excavation area is large, and the conventional large-excavation metal plate column assembly type foundation cannot be applied to mountainous terrain.
The utility model is realized by the following technical scheme:
a steel construction assembled root key basis for transmission line includes: a foundation slab and a foundation support;
the foundation bottom plate comprises bottom section steel, root key connection section steel, middle section steel and a root key; the bottom section steels are arranged at intervals, and the middle section steels are arranged at intervals and fixedly connected with the tops of the dry bottom section steels in a staggered manner; the plurality of key-connected section steels are vertically staggered and fixed to form two layers, the plurality of key-connected section steels on each layer are arranged at intervals, the lower layer of key-connected section steels are fixedly connected with the tops of the middle section steels in a staggered manner, and the upper layer of key-connected section steels are fixedly connected with the bottoms of the basic supports;
root keys on each layer are connected with the end parts of the profile steels and are fixedly connected with the root keys, and the root keys extend into an original soil body around the foundation pit.
As a further development of the utility model, the staggered arrangement is arranged vertically.
As a further improvement of the utility model, the end part of the root key is arranged outside the end part of the root key connecting section steel.
As a further improvement of the utility model, the lengths of the bottom section steel, the root key connecting section steel and the middle section steel are equal to the length of the foundation pit in the corresponding installation direction.
As a further improvement of the utility model, the foundation pit is a square foundation pit, and the lengths of the bottom section steel, the root key connecting section steel and the middle section steel are all equal to the width of the foundation pit.
As a further improvement of the utility model, the base support comprises main materials, oblique materials and top materials, the bottoms of the main materials are fixed at the end part of the root key connecting section steel, and the tops of the main materials are connected with the top materials to form a rectangular pyramid structure; the adjacent main materials are directly fixed in an inclined way through the inclined material.
As a further improvement of the utility model, the top material is higher than the top plane of the foundation pit.
As a further improvement of the utility model, steel cushion blocks are arranged at the gaps of all the fixed connections, and all the connections are fixed by high-strength bolts; the strength of the high-strength bolt is not less than 8.8 grades.
Compared with the prior art, the utility model has the following beneficial effects:
the technical scheme of the utility model realizes the miniaturization, light weight, standardization, modularization and batch processing production of the assembly type foundation, and the bearing performance of the undisturbed soil can be fully exerted by the mode of pushing the root key into the surrounding undisturbed soil body at the base plate, so that the uplift bearing capacity of the foundation is increased, the excavation area of the foundation pit is small, and the assembly type foundation can be used in complex mountain terrains. Meanwhile, the foundation is formed by all spliced steel members, the single weight is light, the transportation and the field installation are convenient, and the construction purpose of rapidness, convenience and economy can be realized. The uplift bearing capacity of the iron tower foundation of the power transmission line is improved, the size of a foundation pit is reduced, the size, the material quantity and the construction period of the foundation are saved, the foundation can be used for complex mountain terrains, the construction period of the foundation is shortened by 1/3 compared with that of a conventional foundation, and the bearing performance is improved by 50%.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. In the drawings:
fig. 1 is a side elevation view of a steel structure assembly type root key foundation for a power transmission line of the present invention.
Fig. 2 is a front elevation view of a steel structure assembly type root key foundation for a power transmission line of the present invention.
Fig. 3 is a top view of a steel structure assembled root key foundation slab for a power transmission line of the present invention.
Fig. 4 is an elevation view of a steel structure assembly type root key foundation slab for a power transmission line according to the present invention.
In the figure, 1-bottom section steel, 2-root bond connection section steel, 3-middle section steel, 4-root bond, 5-main material, 6-oblique material, 7-top material, 8-high-strength bolt and 9-steel cushion block.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. 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. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
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 utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 4, a steel structure assembly type root key foundation for a power transmission line includes a foundation slab and a foundation support;
the foundation bottom plate comprises bottom section steel 1, root key connecting section steel 2, middle section steel 3 and root keys 4; the bottom section steels 1 are arranged at intervals, and the middle section steels 3 are arranged at intervals and fixedly connected with the tops of the bottom section steels 1 in a staggered manner; a plurality of key-connected section steels 2 are vertically staggered and fixed to form two layers, a plurality of key-connected section steels 2 on each layer are arranged at intervals, the lower layer of the key-connected section steels 2 are fixedly connected with the tops of the middle section steels 3 in a staggered manner, and the upper layer of the key-connected section steels 2 are fixedly connected with the bottom of the foundation support;
root key on every layer is connected 2 equal fixed connection root keys 4 of tip of shaped steel, and root key 4 stretches into in the original state soil body around the foundation ditch.
The foundation support comprises main materials 5, oblique materials 6 and top materials 7, the bottoms of the main materials 5 are fixed at the end part of the root key connection section steel 2, and the tops of the main materials 5 are connected with the top materials 7 to form a rectangular pyramid structure; the adjacent main materials 5 are directly fixed in a diagonal way by the diagonal material 6.
As a preferred embodiment, the staggered arrangement is a vertical arrangement.
The end part of the root key 4 is sleeved outside the end part of the root key connecting section steel 2. The lengths of the bottom section steel 1, the root key connecting section steel 2 and the middle section steel 3 are equal to the length of the corresponding installation direction of the foundation pit.
The root keys 4 have two layers, the first layer (green circle in fig. 2) being the front and rear sides, and the second layer (red circle in fig. 1) being the left and right sides. The red circle (first layer root key) and the green circle (second layer root key) of fig. 3 can be seen in a top view. Since the left-right root key is on top in fig. 3, the front-back root key is on the bottom.
The length of the bottom section steel 1, the root key connecting section steel 2 and the middle section steel 3 is equal to the width of the foundation pit.
The top material 7 is higher than the plane of the top of the foundation pit. Steel cushion blocks 9 are arranged at the gaps of the fixed connection, and all the joints are fixed by high-strength bolts 8; the strength of the high-strength bolt is not less than 8.8 grades.
The bottom section steel 1, the root key connecting section steel 2, the middle section steel 3, the root key 4, the main material 5, the oblique material 6, the top material 7 and the steel cushion block 9 are provided with holes which need to be connected by high-strength bolts 8 in advance, and the holes are slightly larger than the high-strength bolts 8, so that later-stage adjustment is facilitated.
And the root key 4 is jacked into the undisturbed soil body around the foundation bottom plate.
The root key 4 can also be replaced by channel steel, H-shaped steel or other types of steel root keys. The bottom plate section steel adopts bottom section steel or I-shaped steel, and the middle section steel 3 can be completely replaced by other types of steel members such as H-shaped steel and I-shaped steel.
Between bottom shaped steel 1 and middle part shaped steel 3, can assemble in advance between main material 5, oblique material 6 and the top material 7, can be connected the foundation support who assembles directly with the bottom plate when the construction, reduce the equipment time.
The number of the root keys 4 and the strength of the high-strength bolt 8 can be determined by theoretical calculation or finite element analysis according to different power transmission line grades and different required pulling-resistant bearing capacities.
The base main material consists of four angle steels, the four angle steels incline upwards and intersect at the same point, and the top material is arranged at the point. The root key in the bottom plate needs to be jacked into the surrounding undisturbed soil body by a jack. The channel steel and the root key in the bottom plate, the middle section steel, the foundation bottom plate, the foundation support, the main material, the inclined material and the top material are fixedly connected through the high-strength bolt, and the strength of the high-strength bolt is not less than 8.8 levels.
When all the components are machined in a factory, the surfaces of the components are coated with anticorrosive materials with certain thicknesses for corrosion prevention, and the components with different corrosion prevention years are coated with different anticorrosive thicknesses according to the standard requirements.
When the high-strength bolt is used, all steel components are prefabricated according to design specifications, when the strength of the high-strength bolt 8 is selected, simulation analysis is carried out through theoretical calculation or finite element software, stress values of bolt connection nodes are calculated, and bolts with corresponding strength are selected according to the calculated stress values.
At the job site, can connect into whole through high strength bolt 8 between bottom shaped steel 2 according to the interval of design and the middle part shaped steel 3 in advance, can fix oblique material 6 and top material 7 through high strength bolt 8 and main material 5 in advance simultaneously, form the foundation support structure, should continuously utilize theodolite, scale to observe when the supporting structure of equipment basis, discover as early as possible situations such as foundation support central point skew.
The utility model also provides a construction method of the steel structure assembly type root key foundation for the power transmission line, which comprises the following steps:
after the foundation pit is excavated, leveling the bottom of the foundation pit, and putting the whole body formed by connecting the bottom section steel 2 and the middle section steel 3 to the bottom of the foundation pit;
determining the position of a first layer of root keys 4, jacking the root keys 4 to the depth determined by theoretical calculation or finite element analysis in the earlier stage, fixedly connecting the first layer of root keys 4 with the bottom section steel 1, and connecting and fixing two webs which are opposite to the root keys 4 through two back-arranged channel steels 2; then connecting the root key connecting section steel 2 with the middle section steel 3;
then, the position of the second layer of root keys 4 is determined, the root keys 4 are jacked to the designed depth, two webs which are opposite to the root keys 4 are connected through the root key connecting section steel 2, then the second layer of root keys 4 are effectively connected with the first layer of root keys 4, and the splicing of the foundation slab is completed;
after the splicing of the foundation slab is completed, the spliced foundation support is placed on the foundation slab, and the position of the foundation support is adjusted and fixed.
The foundation support is assembled in advance through the main material 5, the inclined material 6 and the top material 7, and the assembled foundation support is directly connected with the foundation slab during construction.
The present invention will be described in detail with reference to specific examples.
Examples
As shown in fig. 1 to 4, a steel structure assembly type root key foundation for a power transmission line comprises a steel structure assembly type root key foundation for a power transmission line and a foundation support, wherein the foundation base plate comprises a bottom channel steel 1, a root key connecting groove steel 2, an H-shaped steel 3, an i-shaped steel root key 4, a high-strength bolt 8 and a steel cushion block 9, and the foundation support comprises a main material 5, an oblique material 6, a top material 7 and a high-strength bolt 8.
Carry out foundation ditch excavation, after foundation ditch excavation was accomplished, make level to the foundation ditch bottom, transfer the foundation ditch bottom with the whole that bottom channel-section steel 2 and H shaped steel 3 are connected to it is less to utilize theodolite, scale etc. to fix a position to its when putting the error, can effectively reduce the work load of later stage adjustment.
The method comprises the steps of jacking and connecting the I-steel root keys, determining the position of a first layer of I-steel root key 4, jacking the I-steel root key 4 to the depth determined by theoretical calculation or finite element analysis in the early stage by using a jack at the position, correcting the position of the I-steel root key 4, fixedly connecting the first layer of root key 4 and a bottom channel steel 1 through a high-strength bolt 8, connecting two webs which are opposite to the I-steel root key 4 through two channel steels 2 which are arranged in a back-to-back mode, and fixing through the high-strength bolt 8. Then the root key is connected with the channel steel 2 and the H-shaped steel 3 through the high-strength bolt 8, because the height of the connecting channel steel 2 is lower than that of the I-shaped steel root key 4, so that a certain gap exists between the connecting channel steel 2 and the lower layer H-shaped steel 3, a steel cushion block 9 with a certain size needs to be put in the gap to ensure the structural stability, then the position of the second layer I-shaped steel root key 4 is determined, the I-steel root key 4 is jacked to the designed depth by a jack at the position, the construction mode of the I-steel root key is similar to that of the first layer of root key, two webs which are opposite to the I-steel root key 4 are connected by the root key and the channel steel 2, and then, the second layer of I-steel root keys 4 are effectively connected with the first layer of I-steel root keys 4, steel cushion blocks 9 need to be arranged at the positions with gaps, and all the joints are fixed by high-strength bolts 8, so that the splicing of the foundation slab is completed.
The utility model fully transfers the bearing potential of the soil body around the foundation by the compaction and stress diffusion action of the pushing root key, improves the bearing capacity by utilizing the bond strength and resistance of the soil body to the root key, and the anti-pulling bearing of the existing transmission circuit board column foundation is a main control working condition.
Through finite element analysis, the uplift bearing capacity of the foundation is higher than that of a traditional metal assembly type foundation by more than 50% when the area of the bottom plate is the same as the burial depth, and the uplift bearing capacity of the foundation is mainly provided by the I-shaped steel root keys 4, so that when the bottom plate I-shaped steel root keys 4 are connected, the high-strength bolts 8 need to be screwed down according to connection checking calculation, and the installation is firm.
And (3) mounting the foundation support, after the foundation slab is spliced, transferring the spliced foundation support to the foundation slab, adjusting the position of the foundation support, aligning the bolt hole reserved in the upper structure with the bolt hole reserved in the foundation slab, and connecting and fixing the bolt hole through the high-strength bolt 8. Thereby completing the assembly of the whole steel structure assembly type root key foundation.
Other techniques refer to the prior art.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is considered as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicants be construed as having contemplated such subject matter as being part of the disclosed subject matter.
Claims (8)
1. The utility model provides a steel construction assembled root key basis for transmission line which characterized in that includes: a foundation slab and a foundation support;
the foundation bottom plate comprises bottom section steel (1), root key connecting section steel (2), middle section steel (3) and root keys (4); the bottom section steels (1) are arranged at intervals, and the middle section steels (3) are arranged at intervals and fixedly connected with the tops of the dry bottom section steels (1) in a staggered manner; the plurality of key-connected section steels (2) are vertically staggered and fixed to form two layers, a plurality of key-connected section steels (2) on each layer are arranged at intervals, the lower layer of the key-connected section steels (2) are fixedly connected with the top of the middle section steel (3) in a staggered manner, and the upper layer of the key-connected section steels (2) are fixedly connected with the bottom of the foundation support;
root key on each layer is connected with the end part of the section steel (2) and is fixedly connected with the root key (4), and the root key (4) extends into an original soil body around the foundation pit.
2. The steel structure assembly type root key foundation for the power transmission line of claim 1, wherein: the staggered arrangement is a vertical arrangement.
3. The steel structure assembly type root key foundation for the power transmission line of claim 1, wherein: the end part of the root key (4) is arranged outside the end part of the root key connecting section steel (2).
4. The steel structure assembly type root key foundation for the power transmission line of claim 1, wherein: the lengths of the bottom section steel (1), the root key connecting section steel (2) and the middle section steel (3) are equal to the length of the foundation pit in the corresponding installation direction.
5. The steel structure assembly type root key foundation for the power transmission line of claim 1, wherein: the foundation ditch is square foundation ditch, the length of bottom shaped steel (1), root key connection shaped steel (2) and middle part shaped steel (3) all equals the width of foundation ditch.
6. The steel structure assembly type root key foundation for the power transmission line according to any one of claims 1 to 5, wherein: the foundation support comprises main materials (5), oblique materials (6) and top materials (7), the bottoms of the main materials (5) are fixed at the end part of the root key connecting section steel (2), and the tops of the main materials (5) are connected with the top materials (7) to form a rectangular pyramid structure; the adjacent main materials (5) are directly fixed in an inclined way through the inclined materials (6).
7. The assembled root key basis of steel construction for transmission line of claim 6, characterized in that: and the top material (7) is higher than the plane of the top of the foundation pit.
8. The assembled root key basis of steel construction for transmission line of claim 6, characterized in that: steel cushion blocks (9) are arranged at the gaps of all the fixed connections, and all the connections are fixed by high-strength bolts (8); the strength of the high-strength bolt is not less than 8.8 grades.
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| CN202122172753.9U CN215715466U (en) | 2021-09-08 | 2021-09-08 | Steel structure assembly type root key foundation for power transmission line |
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| CN202122172753.9U CN215715466U (en) | 2021-09-08 | 2021-09-08 | Steel structure assembly type root key foundation for power transmission line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565122A (en) * | 2021-09-08 | 2021-10-29 | 中国电力工程顾问集团西北电力设计院有限公司 | Steel structure assembly type root key foundation for power transmission line and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113565122A (en) * | 2021-09-08 | 2021-10-29 | 中国电力工程顾问集团西北电力设计院有限公司 | Steel structure assembly type root key foundation for power transmission line and construction method |
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Effective date of registration: 20240207 Address after: No.22 Tuanjie South Road, hi tech Industrial Development Zone, Xi'an City, Shaanxi Province, 710075 Patentee after: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group Country or region after: China Patentee after: LANZHOU University OF TECHNOLOGY Patentee after: QINGHAI POWER TRANSMISSION AND DISTRIBUTION ENGINEERING Co.,Ltd. Patentee after: STATE GRID QINGHAI ELECTRIC POWER COMPANY CONSTRUCTION BRANCH Patentee after: STATE GRID QINGHAI ELECTRIC POWER Co. Address before: No.22 Tuanjie South Road, hi tech Industrial Development Zone, Xi'an City, Shaanxi Province, 710075 Patentee before: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group Country or region before: China Patentee before: LANZHOU University OF TECHNOLOGY Patentee before: QINGHAI POWER TRANSMISSION AND DISTRIBUTION ENGINEERING Co.,Ltd. Patentee before: STATE GRID QINGHAI ELECTRIC POWER COMPANY CONSTRUCTION BRANCH |