CN105442626B - It is applied to the compound batter post spread foundation structure of Permafrost Area transmission line of electricity - Google Patents
It is applied to the compound batter post spread foundation structure of Permafrost Area transmission line of electricity Download PDFInfo
- Publication number
- CN105442626B CN105442626B CN201510980351.8A CN201510980351A CN105442626B CN 105442626 B CN105442626 B CN 105442626B CN 201510980351 A CN201510980351 A CN 201510980351A CN 105442626 B CN105442626 B CN 105442626B
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- batter post
- armored concrete
- permafrost
- coarse
- transmission line
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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
- E02D27/42—Foundations for poles, masts or chimneys
-
- 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
- E02D27/35—Foundations formed in frozen ground, e.g. in permafrost soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of compound batter post spread foundation structure for being applied to Permafrost Area transmission line of electricity, including the four armored concrete batter posts set according to shaft tower and superstructure gradient angle of inclination, armored concrete batter post is extend into below Upper Limit of Permafrost, armored concrete batter post bottom is equipped with horizontal steel bar concrete floor, fiberglass sleeve is enclosed with armored concrete batter post shaft, there is coarse-grained soil in four armored concrete batter post central fillers, coarse-grained soil depth of cracking closure is from Upper Limit of Permafrost to natural earth's surface, ragstone layer is equipped with coarse-grained soil；The present invention improves the anthropogenic heating of ever-frozen ground, reduces the horizontal applied force that top shaft tower reaches basis, strengthens the stability and foundation bearing capacity of column foot, to reduce and pull out possibility and engineering freeze injury on column foot.
Description
【Technical field】
Ever-frozen ground is applied to the present invention relates to a kind of batter post spread foundation in Permafrost Area, more particularly to one kind
The compound batter post spread foundation structure of regional transmission line of electricity.
【Background technology】
The Foundation selection of Permafrost Area transmission line of electricity be subject to various conditions serious restriction, especially environmental factor and
The limitation of geological conditions.Batter post spread foundation is a kind of foundation pattern that can effectively reduce tower leg horizontal applied force, common
Soil area, the shaft tower larger to basic role power is extended using concrete after batter post spread foundation and bar material amount than right cylinder
Basis about reduces by 10%~20%.But in Frozen Ground Area, the frost-heave force that seasonally frozen layer is produced makes batter post shaft than right cylinder post
Body bears extra lifting by frost and moment of flexure, and especially in the area that frost heave is higher ranked, batter post shaft easily produces frost-heaving deformation to break
It is bad.In addition, in Permafrost Area, batter post spread foundation is constructed and is changed when filling out, it is necessary to be excavated to below Upper Limit of Permafrost, disturbance
The thermal equilibrium state of permafrost, may result in basic thaw collapse, influence column foot stabilization and line security.
Basic engineering, construction are carried out in Permafrost Area and runed, research is carried out to column foot stability and is be unable to do without for many years
Reciprocal effect problem between frozen soil and engineering, therefore need to have claimed below to foundation soil body：1. basic batter post part soil is reduced
The frost heave of body, evades effect of the frost heave to basic entirety and component as far as possible；2. permafrost degradation can be prevented using engineering measure,
Effective raising freezes the soil body upper limit in peripherally Quito year, reduces invasion of the engineering activity to ever-frozen ground, utilizes as far as possible
Frozen soil bearing capacity higher；3. reduce the horizontal loading that shaft tower is transmitted to basis as far as possible, design special Component composition form to answer
To this imbalance.
Generally speaking, it is necessary to optimize design to spread foundation, and the engineering measure combination that supporting correlation is easily achieved
Into composite construction, and further optimization design and analysis are carried out to its combining structure, base can be extended to Permafrost Area power transmission line
The preventing and treating of the engineering problem such as frost heave, thaw collapse provides technical support in plinth engineering.
【The content of the invention】
In view of above-mentioned, efficient, easy Permafrost Area power transmission line is applied to it is an object of the invention to provide a kind of
The compound batter post spread foundation structure on road, effectively improves its foundation bearing capacity, reduces the horizontal force that top shaft tower reaches basis, subtracts
The contact stress of weak swelling soil-basis contact surface, reduce basic slope component is influenceed by lifting by frost, is realized to Upper Limit of Permafrost
Effective lifting, meanwhile, to prevent and preventing and treating the engineering problem that body frost heaving and thaw collapse cause to provide technical support.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
A kind of compound batter post spread foundation structure for being applied to Permafrost Area transmission line of electricity, including according to shaft tower and on
Portion structure gradient angle of inclination set four armored concrete batter posts, armored concrete batter post extend into Upper Limit of Permafrost with
Under, armored concrete batter post bottom is equipped with horizontal steel bar concrete floor, and glass is enclosed with armored concrete batter post shaft
Glass steel bushing, has coarse-grained soil in four armored concrete batter post central fillers, and coarse-grained soil depth of cracking closure is from ever-frozen ground
The upper limit is equipped with ragstone layer to natural earth's surface on coarse-grained soil.
Further, composite geo-membrane is equipped between coarse-grained soil and ragstone layer.
Further, the horizontal steel bar concrete bottom board size is more than armored concrete batter post horizontal cross section dimension, makees
For batter post spread foundation expands base plate.
Further, fiber glass reinforced plastic cover cylinder size is slightly larger than armored concrete batter post shaft, the same armored concrete of fiberglass sleeve
Gap filling between batter post has lubriation material.
Further, the ragstone layer laying scope lays scope more than coarse-grained soil.
Further, the composite geo-membrane laying scope is more than coarse-grained soil and ragstone layer laying scope.
The present invention is capable of achieving the effective temperature-reducing to Permafrost Area power transmission line column foot, improves the anthropogenic heating of ever-frozen ground,
Reduce the horizontal applied force that top shaft tower reaches basis, strengthen the stability and foundation bearing capacity of column foot, being pulled out on reduction column foot can
Can the invasion of property and earth's surface seepage flow to permafrost.
It is an advantage of the invention that：
1. be enclosed with fiberglass sleeve on armored concrete batter post shaft, fiberglass sleeve with the soil body contact surface more light
Sliding the characteristics of, it is possible to reduce by environmental temperature fluctuation to basic direct lifting by frost power in frozen-thaw process.
2. four armored concrete batter post central fillers have coarse-grained soil, and the soil body can be effectively reduced using coarse granule filler
Frost heaving and its lifting by frost effect brought.
3. ragstone layer is equipped with coarse-grained soil, one synusia rock layers are set by earth's surface, Upper Limit of Permafrost can be improved
Buried depth, it is ensured that foundation soil body frozen state, improve foundation bearing capacity.
4. using compound batter post spread foundation system, batter post, base plate can be prefabricated also cast-in-place, can ensure the default mesh of engineering
Under the premise of target, construction costs is saved, reduce difficulty of construction.
Further, the composite geo-membrane laid at ragstone layer and coarse-grained soil interface, is effectively reduced rainwash to many
The invasion of year frozen soil layer.
【Brief description of the drawings】
Fig. 1 is the cross-sectional structure schematic diagram of compound batter post spread foundation structure of the invention；
Fig. 2 is the earth's surface schematic top plan view of compound batter post spread foundation structure of the invention；
In figure：1. shaft tower and superstructure；2. ragstone layer；3. coarse-grained soil；4. armored concrete batter post；5. fiber glass reinforced plastic cover
Cylinder；6. horizontal steel bar concrete floor；7. composite geo-membrane；8. natural earth's surface；9. Upper Limit of Permafrost；10. shaft tower center
Projection.
【Specific embodiment】
Below with reference to accompanying drawing with the present invention is described in further detail, but it is not intended as being the present invention any limitation
Foundation.
As depicted in figs. 1 and 2, the present invention is applied to the compound batter post spread foundation knot of Permafrost Area transmission line of electricity
Structure, including the four armored concrete batter posts 4 set according to shaft tower and the gradient angle of inclination of superstructure 1, shaft tower central projection
10 4 diagonal position of intersecting point of armored concrete batter post 4, Upper Limit of Permafrost 9 is extend into positioned at armored concrete batter post 4
Hereinafter, the bottom of armored concrete batter post 4 is equipped with horizontal steel bar concrete floor 6, is wrapped up on the shaft of armored concrete batter post 4
There is fiberglass sleeve 5, have coarse-grained soil 3 in four central fillers of armored concrete batter post 4, the depth of cracking closure of coarse-grained soil 3 is certainly
Upper Limit of Permafrost is equipped with ragstone layer 2 to natural earth's surface 8 on coarse-grained soil 3.
The one armored concrete batter post and horizontal steel bar concrete bottom according to shaft tower tower leg gradient inclination angle-adjustable
Plate, it is therefore intended that reduce horizontal force of the top shaft tower to basis, a fiberglass sleeve is wrapped up in batter post shaft, it is therefore intended that
Weaken friction of the batter post with surrounding soil, weaken due to the basic displacement that lifting by frost and thaw collapse trigger.And this structure division component
Can be prefabricated in advance, assembled at the scene during construction, it is adaptable to excavate the construction of spread foundation.
Further, composite geo-membrane 7, the laying scope of composite geo-membrane 7 are equipped between coarse-grained soil 3 and ragstone layer 2
More than coarse-grained soil 3 and the laying scope of ragstone layer 2.To ensure that rainwash will not be to the harassment of ever-frozen ground, at ragstone layer bottom
On the boundary layer that portion fills with coarse-grained soil, lay one layer of composite geo-membrane to prevent rainwash from invading into ground.
Further, the size of horizontal steel bar concrete floor 6 is more than the horizontal cross section dimension of armored concrete batter post 4,
Expand base plate as batter post spread foundation, and the expansion base plate on basis is set into below Upper Limit of Permafrost, with using for many years
Frozen soil stratum foundation bearing capacity higher.
Further, the size of fiberglass sleeve 5 is slightly larger than the shaft of armored concrete batter post 4, the same reinforced concrete of fiberglass sleeve 5
Gap filling between native batter post 4 has lubriation material.
Further, the laying scope of the ragstone layer 2 lays scope more than coarse-grained soil 3.It is capable of achieving defeated to Permafrost Area
The effective temperature-reducing of the electric wire column foot soil body, ragstone layer can accelerate air with the heat exchange of ever-frozen ground, improve the artificial of ever-frozen ground
The upper limit, strengthens the stability and foundation bearing capacity of pole and tower foundation, and possibility and engineering freeze injury are pulled out on the basis of reduction.
Principle of the invention is, in the water that Permafrost Area, the top shaft tower born using right cylinder spread foundation are transmitted
When flat active force is larger, the designing material amount of concrete and reinforcing bar is larger, and uses conventional batter post spread foundation, seasonal freezing
Layer can produce extra frost heave action to batter post component.Therefore according to permanent frozen soil foundation the characteristics of, the applicable batter post of design expands
Exhibition basis, reduces seasonal frozen ground layer lifting by frost effect and reduces influence of the rainwash to ever-frozen ground simultaneously.According to shaft tower main material
The gradient, basic role power and geological conditions, set the batter post spread foundation of differing tilt angles and depth, and by the expansion on basis
Base plate is set into below Upper Limit of Permafrost, with using ever-frozen ground stratum foundation bearing capacity higher.In seasonally frozen layer
In depth bounds, one fiberglass sleeve is set in batter post shaft, it is smaller with soil layer contact friction to pass through fiberglass interface
Mechanism, weaken due to soil layer frost heave on basis produce lifting by frost influence.In inclined column foundation is diagonally opposed, in certain water
Changed in straight angle degree and fill out the less coarse-grained soil filler of frozen-heave factor, to reduce frost heave influence of the shaft surrounding soil on batter post.Together
When certain thickness ragstone layer is laid above earth's surface, underlie for many years to ensure it using the active cooling mechanism of ragstone layer
The stability of frozen soil, further improves foundation bearing capacity and stability.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.
Claims (6)
1. a kind of compound batter post spread foundation structure for being applied to Permafrost Area transmission line of electricity, it is characterised in that：Including according to
According to four armored concrete batter posts (4) that shaft tower and superstructure (1) angle of inclination are set, armored concrete batter post (4) is stretched into
To Upper Limit of Permafrost (9) below, armored concrete batter post (4) bottom is equipped with horizontal steel bar concrete floor (6), reinforcing bar
Fiberglass sleeve (5) is enclosed with concrete batter post (4) shaft, has thick in four armored concrete batter post (4) central fillers
Grain is native (3), and coarse-grained soil (3) depth of cracking closure is that, from Upper Limit of Permafrost to natural earth's surface (8), coarse-grained soil is equipped with (3)
Ragstone layer (2).
2. the compound batter post spread foundation structure for being applied to Permafrost Area transmission line of electricity according to claim 1, its
It is characterised by：Composite geo-membrane (7) is equipped between coarse-grained soil (3) and ragstone layer (2).
3. the compound batter post spread foundation structure for being applied to Permafrost Area transmission line of electricity according to claim 1, its
It is characterised by：Horizontal steel bar concrete floor (6) size is more than armored concrete batter post (4) horizontal cross section dimension, makees
For batter post spread foundation expands base plate.
4. the compound batter post spread foundation structure for being applied to Permafrost Area transmission line of electricity according to claim 1, its
It is characterised by：Fiberglass sleeve (5) size is slightly larger than armored concrete batter post (4) shaft, fiberglass sleeve (5) same to reinforced concrete
Gap filling between native batter post (4) has lubriation material.
5. the compound batter post spread foundation for being applied to Permafrost Area transmission line of electricity according to claim any one of 1-4
Structure, it is characterised in that：Ragstone layer (2) the laying scope lays scope more than coarse-grained soil (3).
6. the compound batter post spread foundation structure for being applied to Permafrost Area transmission line of electricity according to claim 2, its
It is characterised by：Composite geo-membrane (7) the laying scope is more than coarse-grained soil (3) and ragstone layer (2) laying scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980351.8A CN105442626B (en) | 2015-12-23 | 2015-12-23 | It is applied to the compound batter post spread foundation structure of Permafrost Area transmission line of electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980351.8A CN105442626B (en) | 2015-12-23 | 2015-12-23 | It is applied to the compound batter post spread foundation structure of Permafrost Area transmission line of electricity |
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| Publication Number | Publication Date |
|---|---|
| CN105442626A CN105442626A (en) | 2016-03-30 |
| CN105442626B true CN105442626B (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510980351.8A Active CN105442626B (en) | 2015-12-23 | 2015-12-23 | It is applied to the compound batter post spread foundation structure of Permafrost Area transmission line of electricity |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057497B (en) * | 2018-08-22 | 2019-07-26 | 国网内蒙古东部电力有限公司经济技术研究院 | A kind of anti-freeze expansion shaft tower |
| CN109235481A (en) * | 2018-10-22 | 2019-01-18 | 青海省地质环境监测总站 | A kind of construction method preventing lifting by frost for transmission line of electricity column foundation |
| CN111535106B (en) * | 2020-05-14 | 2021-12-10 | 哈尔滨工业大学 | Method for reducing melting, sedimentation and deformation of permafrost region highway during operation |
| CN111877408A (en) * | 2020-06-05 | 2020-11-03 | 国网内蒙古东部电力有限公司建设分公司 | Shallow foundation surface layer snow accumulation prevention infiltration and heat preservation system for overhead transmission line in cold region |
| CN113417313B (en) * | 2021-07-20 | 2023-02-03 | 四川电力设计咨询有限责任公司 | Section steel support shroud plate assembled foundation for frozen soil area |
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| CN201865117U (en) * | 2010-11-23 | 2011-06-15 | 江苏省电力公司句容市供电公司 | Line terminal tower foundation with cable protecting pipe |
| CN103452128A (en) * | 2013-08-06 | 2013-12-18 | 安徽华电工程咨询设计有限公司 | Method for lifting base plane of power transmission line tower by adopting steel pipe connecting leg |
| CN204098056U (en) * | 2014-09-24 | 2015-01-14 | 国家电网公司 | Colliery minery UHV transmission steel tower agent on crack resistance of concrete distortion found |
| CN205224071U (en) * | 2015-12-23 | 2016-05-11 | 中国电力工程顾问集团西北电力设计院有限公司 | Be applied to ever -frozen ground area transmission line's compound batter post extension foundation structure |
| JPWO2014014033A1 (en) * | 2012-07-20 | 2016-07-07 | 伊藤組土建株式会社 | Pile foundation and pile foundation installation method |
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2015
- 2015-12-23 CN CN201510980351.8A patent/CN105442626B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201865117U (en) * | 2010-11-23 | 2011-06-15 | 江苏省电力公司句容市供电公司 | Line terminal tower foundation with cable protecting pipe |
| JPWO2014014033A1 (en) * | 2012-07-20 | 2016-07-07 | 伊藤組土建株式会社 | Pile foundation and pile foundation installation method |
| CN103452128A (en) * | 2013-08-06 | 2013-12-18 | 安徽华电工程咨询设计有限公司 | Method for lifting base plane of power transmission line tower by adopting steel pipe connecting leg |
| CN204098056U (en) * | 2014-09-24 | 2015-01-14 | 国家电网公司 | Colliery minery UHV transmission steel tower agent on crack resistance of concrete distortion found |
| CN205224071U (en) * | 2015-12-23 | 2016-05-11 | 中国电力工程顾问集团西北电力设计院有限公司 | Be applied to ever -frozen ground area transmission line's compound batter post extension foundation structure |
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| CN105442626A (en) | 2016-03-30 |
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