CN113529778A - Construction method for foundation of electric power iron tower in plateau area - Google Patents
Construction method for foundation of electric power iron tower in plateau area Download PDFInfo
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- CN113529778A CN113529778A CN202110820355.5A CN202110820355A CN113529778A CN 113529778 A CN113529778 A CN 113529778A CN 202110820355 A CN202110820355 A CN 202110820355A CN 113529778 A CN113529778 A CN 113529778A
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- 238000010276 construction Methods 0.000 title claims abstract description 54
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000002699 waste material Substances 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 25
- 239000004744 fabric Substances 0.000 claims description 18
- 238000009412 basement excavation Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000002787 reinforcement Effects 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 7
- 239000004746 geotextile Substances 0.000 claims description 6
- 239000002985 plastic film Substances 0.000 claims description 6
- 229920006255 plastic film Polymers 0.000 claims description 6
- 238000005338 heat storage Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 230000003203 everyday effect Effects 0.000 claims description 4
- 210000003205 muscle Anatomy 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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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)
Abstract
A construction method for an electric iron tower foundation in a plateau area belongs to the technical field of electric construction, and can solve the problems of large damage to vegetation in a construction area, large construction amount, inconvenient construction, time and labor waste, low construction efficiency and labor and material waste of a traditional foundation construction method. The invention is completely suitable for the environmental conditions of high-altitude areas such as Sichuan-Tibet and the like, and is beneficial to energy conservation and environmental protection. The damage to the plateau environment is greatly reduced. The foundation quality is ensured, and the construction safety is improved.
Description
Technical Field
The invention belongs to the technical field of electric power construction, and particularly relates to a construction method of an electric power iron tower foundation in a plateau area.
Background
The highland areas such as the Sichuan province and the like have high terrain, complex geological conditions, rich forest resources, high cold and oxygen deficiency, and fragile environment, and are easy to damage.
The traditional electric power iron tower foundation construction adopts a method of slope excavation, foundation pouring and backfilling, and the method has the advantages of large excavation and filling amount, great damage to original vegetation, inconvenience in construction, time and labor waste, low construction efficiency, labor and material waste and great waste of manpower and material resources. In addition, the method needs to use machines on a large scale, the construction conditions of mountain areas in plateau are harsh, the machines cannot be used on a large scale, and most areas can only be operated manually. The method is invented in order to reduce the environmental damage to high-altitude areas such as Sichuan-Tibet, ensure the construction safety and quality and improve the resource utilization rate and the construction efficiency.
Disclosure of Invention
The invention provides a construction method of a power iron tower foundation in a plateau area, aiming at the problems of great damage to vegetation in a plateau construction area, large construction amount, inconvenience in construction, time and labor waste, low construction efficiency, labor and material waste in the traditional foundation construction method.
The invention adopts the following technical scheme:
a construction method of a power iron tower foundation in a plateau area comprises the following steps:
firstly, arranging a construction field ground plane, measuring and determining a foundation position, and dividing a construction area;
with the central pile as the center, arranging a surface soil curing area, a waste soil stacking area, a household garbage centralized collecting area, a construction tool storage area, a steel bar stacking area, a fine aggregate stacking area, a coarse aggregate stacking area, a concrete stirring and taking and cement stacking area in sequence on a construction site along the counterclockwise direction, wherein fire extinguishers are arranged in the concrete stirring area and the construction tool storage area;
secondly, treating surface soil and spoil;
firstly laying a layer of color stripe cloth in the divided topsoil curing area, then taking down the turf of the basic area and placing the turf on the color stripe cloth in the topsoil curing area, and watering and curing the turf every day to prevent the turf from drying due to water shortage; the spoil stacking mode: the raw soil below the surface soil is spoil, and a temporary conveying channel is paved by using color stripe cloth during conveying and placed in a spoil stacking area;
thirdly, excavating a foundation pit;
the foundation pit excavation adopts a manual excavation mode, the excavation is carried out section by section, the concrete retaining wall of the section is cast after each section is excavated, the first section of the concrete retaining wall is 150mm higher than the pit opening and is provided with a locking opening, the excavation of the next section of the foundation pit is carried out after the strength of the upper section of the concrete retaining wall is more than 3.0MPa, the overlapping length of the upper section of the concrete retaining wall and the lower section of the concrete retaining wall is 280mm, and reinforcing steel bars of the upper section of the concrete retaining wall are embedded into the lower section of the concrete retaining wall;
fourthly, manufacturing a reinforcement cage, placing the reinforcement cage into a foundation pit after weaving, manufacturing a foundation mould by using a wood board above the foundation pit, pouring concrete, completing pouring of each foundation at one time, removing the mould when the strength of the concrete reaches the design strength after the pouring of the concrete is completed and the surface and edges and corners of the foundation can be guaranteed not to be damaged when the mould is removed, and recovering vegetation in the construction area according to the original appearance after the pouring of the foundation is completed;
fifthly, maintaining the foundation, wherein the foundation is maintained by adopting a comprehensive heat storage method;
and sixthly, after the iron tower is assembled, building a protective cap on the top surface of the foundation after the relative bolts on the tower leg inclined material connecting plate are tightened.
The peeling depth of the surface soil is 300-500 mm.
The spoil is stacked according to the trapezoid, the height is not more than 1 meter, and the distance from the bottom layer edge to the color stripe cloth edge is not less than 1.5 meters.
And each section of the foundation pit is set to be 500-1000 m.
The reinforcing mesh of the concrete retaining wall adopts HPB 300-grade reinforcing steel bars, and C30 concrete is cast in the locking notch and the retaining wall.
The steel reinforcement cage includes a plurality of perpendicular muscle, and the equidistant circumference that is arranged, erects the inboard and the outside of muscle and is equipped with a plurality of equidistant interior stirrup and the outer stirrup of arranging respectively, and interior stirrup interval is 350mm, and outer stirrup interval is 220 mm.
The comprehensive heat storage maintenance method comprises the following steps: firstly, laying 2 layers of plastic films on the exposed surface of concrete; covering a layer of geotextile on the plastic film; and thirdly, covering two layers of quilts on the geotextile, binding the quilts with the basic template, covering the quilts with soil, covering the covering layer for 200mm, and measuring the temperature at regular time through a thermometer to observe the temperature change of the concrete.
The invention has the following beneficial effects:
1. the traditional method adopts mechanical construction, and the invention adopts a manual excavation mode, thereby being suitable for the construction environment of high-altitude areas such as Sichuan-Tibet and the like.
2. According to the method, a layer of color stripe cloth is laid in a divided topsoil maintenance area, then the turf in a basic area is taken down and placed on the color stripe cloth in the topsoil maintenance area, and the turf is watered and maintained every day, so that the turf is prevented from drying due to water shortage; the spoil stacking mode: the raw soil below the surface soil is spoil, and a temporary conveying channel is paved by using color strip cloth during conveying and is placed in a spoil stacking area, so that the maintenance of the surface soil is realized, and the damage to the environment is reduced.
3. The invention has small working area and small excavation amount.
4. The invention ensures the construction safety and quality and improves the resource utilization rate and the construction efficiency.
5. After the foundation is poured, the vegetation recovery is carried out on the construction area according to the original appearance, so that the environmental damage to the plateau areas such as Sichuan-Tibet is reduced.
6. The invention can reasonably plan the construction area and also can achieve the purpose of preventing construction waste from polluting the environment.
Drawings
FIG. 1 is a plan layout view of a foundation construction site of an electric power iron tower according to the present invention;
FIG. 2 is a schematic view of a first section of a retaining wall lost-circulation of the present invention;
FIG. 3 is a schematic view of the remaining retaining wall grommets;
FIG. 4 is a front view of a reinforcement bar of the foundation;
FIG. 5 is a top view of a reinforcement bar of the foundation;
FIG. 6 is a schematic view of a basic protective cap;
wherein: 1-a fire extinguisher; 2-locking the notch; 3-protecting the wall steel bar; 4-protecting the wall; 5-a base; 6-vertical ribs; 7-inner stirrups; 8-outer stirrups; 9-basic protective cap.
Detailed Description
The invention is further explained with reference to the accompanying drawings.
As shown in the figure, the construction method of the electric power iron tower foundation in the plateau area comprises the following steps:
(1) and measuring and determining the positions of the center pile and the four foundation centers, and arranging a construction site according to the figure 1. A layer of color stripe cloth is laid in the divided construction areas to prevent the building materials and tools from polluting the environment, and then the building materials are stacked in order after being packaged by woven bags and are placed in the corresponding areas. The bottom of the coarse and fine aggregate and cement stacking area is paved with a layer of straw mat, a layer of color strip cloth is paved on the straw mat, then the material is stacked on the color strip cloth, and the upper surface of the material is covered with a layer of quilt after being paved with the color strip cloth. The construction area storage area and the concrete mixing area are respectively provided with a fire extinguisher.
(2) A layer of color stripe cloth is laid in the divided surface soil maintenance area, then the turf in the basic area is taken down and placed in the surface soil turf and the surface soil maintenance area, and the turf is watered and maintained every day, so that the turf is prevented from drying due to water shortage. The stripping depth of the surface soil is 300-500 mm. The raw soil below the surface soil is paved with the color stripe cloth to form a temporary conveying channel during conveying, the temporary conveying channel is placed in a raw soil stacking area, the raw soil is stacked according to a trapezoid shape, the height of the raw soil is not more than 1 meter, and the distance between the bottom layer edge and the color stripe cloth edge is not less than 1.5 meters.
(3) The foundation pit excavation adopts the mode of manual excavation, and excavation section by section is set to be 500-1000 mm according to the actual geological condition of a construction site. And pouring the concrete retaining wall section after each section is dug, wherein the first concrete retaining wall section is 150mm higher than the pit opening and is provided with a locking opening. And after the strength of the concrete of the upper retaining wall section is more than 3.0MPa, excavating the next section of foundation pit, wherein the lap joint length of the upper and lower retaining wall sections is 280 mm. The wall is cast by C30 concrete, and the reinforcing mesh of the wall is HPB300 grade reinforcing steel. The annular and vertical reinforcing steel bar nets are arranged in the thickness direction of the protective wall. The upper protecting wall steel bar is embedded into the lower protecting wall.
(4) The vertical bars of the steel bar cage adopt three-level HRB400 threaded steel bars, and the stirrups adopt one-level HPB300 steel bars. 19 vertical ribs are uniformly arranged into a circle. The outer stirrup spacing is 220mm, and the inner stirrup spacing is 350 mm. The stirrups and the main reinforcements are bound and connected by adopting 1.0 binding wires. The steel bar binding is firstly marked according to the steel bar interval of the construction drawing, and then the steel bar distribution and binding are carried out; the bound steel bars are required to be horizontal and vertical, the specification, the number, the position and the spacing are correct, and the phenomena of button missing and button loosening cannot occur in binding; the reinforcing steel bar binding buckles can not face to one direction and need to be splayed buckles.
(5) And (4) after the reinforcement cage is woven, putting the reinforcement cage into a foundation pit, and manufacturing a basic die by using a wood board above the foundation pit. And measuring and adjusting the positions of the foundation mold and the foundation bolt by a measurer by using a total station. The mould and the foundation bolt are fixed in proper positions, so that the position deviation is prevented when concrete is poured. The concrete construction adopts a small mixer to carry out on-site mixing according to the mixing proportion. When concrete is poured, no water can be accumulated in the foundation pit, and when the underground water level of the foundation pit is higher or the water seepage amount is too large, measures such as field water interception, precipitation or underwater concrete pouring are taken. When the concrete blanking height exceeds 2m, chute materials are adopted. And pouring concrete of each foundation once. And after the concrete is poured, when the strength of the concrete reaches the design strength, the surface and edges of the foundation are not damaged when the foundation is demolded, and then the formwork is demolded. And after the foundation pouring is finished, carrying out vegetation recovery on the construction area according to the original appearance.
(6) And after the concrete is poured on the foundation, immediately carrying out heat preservation maintenance on the foundation exposed out of the ground. The concrete is maintained by adopting a comprehensive heat storage method. The maintenance method comprises the steps of firstly, laying 2 layers of plastic films on the exposed surface of concrete; covering a layer of geotextile on the plastic film; and thirdly, covering two layers of quilts on the geotextile, tightly binding the quilts with the foundation template, and covering with soil, wherein the covering layer is 200 mm. The temperature is measured regularly by a thermometer to observe the temperature change of the concrete.
(7) After the iron tower is assembled, building a protective cap on the top surface of a foundation after the relative bolts on the inclined material connecting plate of the tower leg are tightened, wherein the protective cap is made of C15 concrete, the size of the protective cap is 50mm, the side length is increased by 50mm according to each side of the outer side of the tower base plate, the height is increased by 50mm according to the exposed height of the foundation bolt, in addition, the upper part is smeared to form a dimensional inclined plane with an alpha angle not less than 15 degrees, and the edge angle of the edge of the protective cap is chamfered.
Claims (7)
1. A construction method of a foundation of an electric power iron tower in a plateau area is characterized by comprising the following steps: the method comprises the following steps:
firstly, arranging a construction field ground plane, measuring and determining a foundation position, and dividing a construction area;
with the central pile as the center, arranging a surface soil curing area, a waste soil stacking area, a household garbage centralized collecting area, a construction tool storage area, a steel bar stacking area, a fine aggregate stacking area, a coarse aggregate stacking area, a concrete stirring and taking and cement stacking area in sequence on a construction site along the counterclockwise direction, wherein fire extinguishers are arranged in the concrete stirring area and the construction tool storage area;
secondly, treating surface soil and spoil;
firstly laying a layer of color stripe cloth in the divided topsoil curing area, then taking down the turf of the basic area and placing the turf on the color stripe cloth in the topsoil curing area, and watering and curing the turf every day to prevent the turf from drying due to water shortage; the spoil stacking mode: the raw soil below the surface soil is spoil, and a temporary conveying channel is paved by using color stripe cloth during conveying and placed in a spoil stacking area;
thirdly, excavating a foundation pit;
the foundation pit excavation adopts a manual excavation mode, the excavation is carried out section by section, the concrete retaining wall of the section is cast after each section is excavated, the first section of the concrete retaining wall is 150mm higher than the pit opening and is provided with a locking opening, the excavation of the next section of the foundation pit is carried out after the strength of the upper section of the concrete retaining wall is more than 3.0MPa, the overlapping length of the upper section of the concrete retaining wall and the lower section of the concrete retaining wall is 280mm, and reinforcing steel bars of the upper section of the concrete retaining wall are embedded into the lower section of the concrete retaining wall;
fourthly, manufacturing a reinforcement cage, placing the reinforcement cage into a foundation pit after weaving, manufacturing a foundation mould by using a wood board above the foundation pit, pouring concrete, completing pouring of each foundation at one time, removing the mould when the strength of the concrete reaches the design strength after the pouring of the concrete is completed and the surface and edges and corners of the foundation can be guaranteed not to be damaged when the mould is removed, and recovering vegetation in the construction area according to the original appearance after the pouring of the foundation is completed;
fifthly, maintaining the foundation, wherein the foundation is maintained by adopting a comprehensive heat storage method;
and sixthly, after the iron tower is assembled, building a protective cap on the top surface of the foundation after the relative bolts on the tower leg inclined material connecting plate are tightened.
2. The method for constructing the foundation of the electric power iron tower in the plateau area according to claim 1, wherein the method comprises the following steps: the peeling depth of the surface soil is 300-500 mm.
3. The method for constructing the foundation of the electric power iron tower in the plateau area according to claim 1, wherein the method comprises the following steps: the spoil is stacked according to the trapezoid, the height is not more than 1 meter, and the distance from the bottom layer edge to the color stripe cloth edge is not less than 1.5 meters.
4. The method for constructing the foundation of the electric power iron tower in the plateau area according to claim 1, wherein the method comprises the following steps: and each section of the foundation pit is set to be 500-1000 m.
5. The method for constructing the foundation of the electric power iron tower in the plateau area according to claim 1, wherein the method comprises the following steps: the reinforcing mesh of the concrete retaining wall adopts HPB 300-grade reinforcing steel bars, and C30 concrete is cast in the locking notch and the retaining wall.
6. The method for constructing the foundation of the electric power iron tower in the plateau area according to claim 1, wherein the method comprises the following steps: the steel reinforcement cage includes a plurality of perpendicular muscle, and the equidistant circumference that is arranged, erects the inboard and the outside of muscle and is equipped with a plurality of equidistant interior stirrup and the outer stirrup of arranging respectively, and interior stirrup interval is 350mm, and outer stirrup interval is 220 mm.
7. The method for constructing the foundation of the electric power iron tower in the plateau area according to claim 1, wherein the method comprises the following steps: the comprehensive heat storage maintenance method comprises the following steps: firstly, laying 2 layers of plastic films on the exposed surface of concrete; covering a layer of geotextile on the plastic film; and thirdly, covering two layers of quilts on the geotextile, binding the quilts with the basic template, covering the quilts with soil, covering the covering layer for 200mm, and measuring the temperature at regular time through a thermometer to observe the temperature change of the concrete.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110820355.5A CN113529778A (en) | 2021-07-20 | 2021-07-20 | Construction method for foundation of electric power iron tower in plateau area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110820355.5A CN113529778A (en) | 2021-07-20 | 2021-07-20 | Construction method for foundation of electric power iron tower in plateau area |
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| CN113529778A true CN113529778A (en) | 2021-10-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446088A (en) * | 2008-11-11 | 2009-06-03 | 中国电力科学研究院 | Construction method for pole and tower foundation in Gobi Desert gravelly soil area |
| JP2018021322A (en) * | 2016-08-02 | 2018-02-08 | 東京電力ホールディングス株式会社 | Pile foundation and tower reconstruction method |
| CN109826224A (en) * | 2019-03-08 | 2019-05-31 | 中国能源建设集团安徽省电力设计院有限公司 | A kind of sinking well protection wall digging foundation and its construction method for desert region iron tower of power transmission line |
| CN111485573A (en) * | 2020-03-19 | 2020-08-04 | 衡水衡源电力建设有限责任公司 | Transmission project prefabricated foundation installation and iron tower assembly coherent construction method |
-
2021
- 2021-07-20 CN CN202110820355.5A patent/CN113529778A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446088A (en) * | 2008-11-11 | 2009-06-03 | 中国电力科学研究院 | Construction method for pole and tower foundation in Gobi Desert gravelly soil area |
| JP2018021322A (en) * | 2016-08-02 | 2018-02-08 | 東京電力ホールディングス株式会社 | Pile foundation and tower reconstruction method |
| CN109826224A (en) * | 2019-03-08 | 2019-05-31 | 中国能源建设集团安徽省电力设计院有限公司 | A kind of sinking well protection wall digging foundation and its construction method for desert region iron tower of power transmission line |
| CN111485573A (en) * | 2020-03-19 | 2020-08-04 | 衡水衡源电力建设有限责任公司 | Transmission project prefabricated foundation installation and iron tower assembly coherent construction method |
Non-Patent Citations (2)
| Title |
|---|
| 康朋等: "重庆地区架空线路施工占用地赔偿面积计算方法探索", 《中国电力企业管理》 * |
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Application publication date: 20211022 |
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