CN102953392A - Pile foundation structure of photovoltaic power station and construction process of pile foundation - Google Patents
Pile foundation structure of photovoltaic power station and construction process of pile foundation Download PDFInfo
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- CN102953392A CN102953392A CN2012104165254A CN201210416525A CN102953392A CN 102953392 A CN102953392 A CN 102953392A CN 2012104165254 A CN2012104165254 A CN 2012104165254A CN 201210416525 A CN201210416525 A CN 201210416525A CN 102953392 A CN102953392 A CN 102953392A
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Abstract
The invention provides a pile foundation structure of a photovoltaic power station, which is suitable for construction of the photovoltaic power station in a desolate beach of Gobi with a complex geologic structure. The pile foundation structure of the photovoltaic power station is characterized by comprising a prefabricated steel pile and a pile hole vertical to the horizontal plane. The prefabricated steel pile is installed in the pile hole and inserted into a soil layer at the bottom of the pile hole and the top of the prefabricated steel pile extends out of the ground. A concrete layer is poured between the hole wall of the pile hole and the prefabricated steel pile. A compact pure soil layer is backfilled on the upper part of the concrete layer. The invention further provides a construction process of the pile foundation of the photovoltaic power station. The construction process is simple in process and low in cost, and the ecological environment is not easy to damage. The construction process of the pile foundation of the photovoltaic power station is characterized by comprising the steps of: first, drilling the pile hole by a large excavator; then, inserting the prefabricated steel pile into the soil layer at the bottom of the pile hole through the pile hole; then, pouring concrete into the pile hole and vibrating with a vibrator while pouring the concrete; and finally, backfilling the pure soil and compacting on the upper part of the concrete layer.
Description
Technical field
The present invention relates to the photovoltaic plant technical field of construction, be specially a kind of pile foundation structure and pile foundation construction technique of photovoltaic plant.
Background technology
The basis of general photovoltaic plant mostly is independently box foundation, its construction is excavation pit at first, then in foundation ditch, foundation forms is assembled into box-shaped, concreting in the box-shaped template again, stripping gets final product after the concrete curing expiration, its construction technology is simple, it is more single that but it is only applicable to geologic structure, the area that soil property is relatively soft, for the NORTHWEST CHINA hinterland, particularly the Gobi desert barren beach is regional, because such regional geology complex structure, soil property is hard, and the stratum contains a large amount of rubbles, so its difficulty of construction is large, efficient is low, cost is high; In addition, carry out large-scale excavation of foundation pit in such area, understand the heavy damage surface vegetation, thereby affect the ecological environment of this area's fragility.
Summary of the invention
For the problems referred to above, the invention provides a kind of pile foundation structure of photovoltaic plant, it is applicable to the construction of the photovoltaic plant in complicated barren beach area, Gobi desert of geologic structure, for this reason, the present invention also provides the construction technology of this kind photovoltaic plant pile foundation, its construction technology is simple, cost is low, survivable ecological environment.
A kind of pile foundation structure of photovoltaic plant, it is characterized in that: it comprises prefabricated piling bar and the stake hole vertical with Earth surface plane, described prefabricated piling bar is installed in the described stake hole and described prefabricated piling bar inserts in described the soil layer bottom the hole, elevate above the soil in the top, built layer of concrete between the hole wall in described stake hole and the described prefabricated piling bar, the top backfill of described layer of concrete has closely knit plain soil layer.
It is further characterized in that:
The buried depth H of described prefabricated piling bar ' be 1.3m～1.4m; Described pre-manufactured steel pile length L is greater than described stake hole depth H 20cm at least; Described prefabricated piling bar upper end is equipped with the support mounting flange; Described pile body surface has the resistance to plucking tongue and groove of annular.
A kind of construction technology of photovoltaic plant pile foundation, it is characterized in that: at first adopt large excavator to drill through a hole, then the soil layer that prefabricated piling bar is inserted bottom, described stake hole by described stake hole is concreting in the described stake hole again, and vibrate with vibrator in concreting limit, limit, at last real the getting final product of layer of concrete top backfill element soil pressure.
It is further characterized in that:
When described large excavator drills through hole, the water filling in the described stake hole while holing;
The digging arm end of described large excavator is equipped with drilling rod, and described drilling rod front end is equipped with drill bit, needs held stationary, not run-off the straight and displacement when described excavator is in place, and keeps drilling rod perpendicular to the ground;
The center deviation in described stake hole, wherein central pile be not more than ± 40mm, skirt piles be not more than ± 30mm stake hole depth allowable variation+100mm, vertical degree of the peg hole allowable variation≤0.01L, sediment thickness≤50mm at the bottom of the stake hole, hole; Described strength grade of concrete C20.
Photovoltaic plant pile foundation structure of the present invention, its prefabricated piling bar passes the stake hole vertical with the ground facial plane, the soil layer of bottom, stake hole is inserted in its bottom, the top concreting is also with plain earthen backfill compacting, photovoltaic power plant bracket directly with the support mounting flange connection at prefabricated piling bar top, it is simple in structure, and supporting is stable; The pile body of prefabricated piling bar has the resistance to plucking tongue and groove of annular, can more effectively guarantee stable support; Its construction does not need to carry out large-area excavation of foundation pit, only by large excavator configuration drilling rod and drill bit vertical drilling is carried out on ground, again prefabricated piling bar is inserted soil layer by this vertical drilling, prefabricated piling bar is fixed in the native closely knit backfill of element by concreting again and guarantees in the vertical drilling that it is reliable and stable, its construction is convenient, efficiency of construction is high, and can not cause large tracts of land to damage to surface vegetation, effectively guarantee environment; The water filling in the stake hole while holing when drilling through hole, can so that the silt particle in the stake hole to meet cement solid, particularly regional for the larger Gobi desert barren beach of gravel content, more be conducive to the shaping in a hole, guarantee the follow-up construction of pile foundation.
Description of drawings
Fig. 1 is photovoltaic plant pile foundation structure schematic diagram among the present invention.
The specific embodiment
See Fig. 1, it comprises stake hole 1 and the prefabricated piling bar 2 vertical with Earth surface plane photovoltaic plant pile foundation structure of the present invention, prefabricated piling bar 2 is installed in the hole 1 and prefabricated piling bar 2 inserts in the soil layer of bottom, hole, elevate above the soil in the top, built layer of concrete 3 between the hole wall in stake hole 2 and the prefabricated piling bar, layer of concrete 3 top backfills have closely knit plain soil layer 4.The buried depth H of prefabricated piling bar ' be 1.3m～1.4m; The length L of prefabricated piling bar 2 is greater than stake hole 1 depth H 20cm at least; Prefabricated piling bar 2 upper ends are equipped with support mounting flange 5, and prefabricated piling bar 2 pile body surfaces have the resistance to plucking tongue and groove 6 of annular.
Photovoltaic plant pile foundation construction technique of the present invention: at first adopt large excavator to drill through a hole, in large excavator drilling rod and drill bit are installed, need held stationary when excavator is in place, not run-off the straight and displacement, and keep drilling rod perpendicular to the ground, stake center, the hole deviation that wherein drills through should satisfy central pile and be not more than ± 40mm, skirt piles are not more than ± 30mm, stake hole depth H allowable variation+100mm, vertical degree of the peg hole allowable variation≤0.01L, sediment thickness≤50mm at the bottom of the stake hole, hole, in the water filling in the stake hole while holing of when boring, so that the silt particle mud in the hole is guaranteed pile hole forming admittedly, then with prefabricated piling bar through being inserted into the soil layer below the hole in the stake hole, building the C20 layer of concrete again between stake hole wall and prefabricated piling bar, vibrates with vibrator in concreting limit, limit, at last backfill element soil on layer of concrete.
Claims (9)
1. the pile foundation structure of a photovoltaic plant, it is characterized in that: it comprises prefabricated piling bar and the stake hole vertical with Earth surface plane, described prefabricated piling bar is installed in the described stake hole and described prefabricated piling bar inserts in described the soil layer bottom the hole, elevate above the soil in the top, built layer of concrete between the hole wall in described stake hole and the described prefabricated piling bar, the top backfill of described layer of concrete has closely knit plain soil layer.
2. the pile foundation structure of a kind of photovoltaic plant according to claim 1 is characterized in that: the buried depth H of described prefabricated piling bar ' be 1.3m～1.4m.
3. the pile foundation structure of a kind of photovoltaic plant according to claim 2 is characterized in that: described pre-manufactured steel pile length L is greater than described stake hole depth H 20cm at least.
4. the pile foundation structure of a kind of photovoltaic plant according to claim 3, it is characterized in that: described prefabricated piling bar upper end is equipped with the support mounting flange.
5. the pile foundation structure of a kind of photovoltaic plant according to claim 4 is characterized in that: described pile body surface has the resistance to plucking tongue and groove of annular.
6. the construction technology of a photovoltaic plant pile foundation, it is characterized in that: at first adopt large excavator to drill through a hole, then the soil layer that prefabricated piling bar is inserted bottom, described stake hole by described stake hole is concreting in the described stake hole again, and vibrate with vibrator in concreting limit, limit, at last real the getting final product of layer of concrete top backfill element soil pressure.
7. the construction technology of a kind of photovoltaic plant pile foundation according to claim 6 is characterized in that: when described large excavator drills through hole, and the water filling in the described stake hole while holing.
8. according to claim 6 or the construction technology of 7 described a kind of photovoltaic plant pile foundations, it is characterized in that: the digging arm end of described large excavator is equipped with drilling rod, described drilling rod front end is equipped with drill bit, need held stationary, not run-off the straight and displacement when described excavator is in place, and keep drilling rod perpendicular to the ground.
9. the construction technology of a kind of photovoltaic plant pile foundation according to claim 8, it is characterized in that: the center deviation in described stake hole, wherein central pile be not more than ± 40mm, skirt piles be not more than ± 30mm, stake hole depth allowable variation+100mm, vertical degree of the peg hole allowable variation≤0.01L, sediment thickness≤50mm at the bottom of the stake hole, hole; Described strength grade of concrete C20.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210416525.4A CN102953392B (en) | 2012-10-27 | 2012-10-27 | A kind of pile foundation structure of photovoltaic plant and pile foundation construction technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210416525.4A CN102953392B (en) | 2012-10-27 | 2012-10-27 | A kind of pile foundation structure of photovoltaic plant and pile foundation construction technique |
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| CN102953392A true CN102953392A (en) | 2013-03-06 |
| CN102953392B CN102953392B (en) | 2015-12-02 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695461A (en) * | 2015-02-10 | 2015-06-10 | 浙江中控太阳能技术有限公司 | Upright post-type heliostat mounting base and mounting method thereof |
| CN110359450A (en) * | 2019-07-29 | 2019-10-22 | 中铁二院工程集团有限责任公司 | Assembled circle pilework and construction method |
| CN110409480A (en) * | 2019-07-26 | 2019-11-05 | 北京北控光伏科技发展有限公司 | A kind of construction method on the photovoltaic bracket basis in gravel place |
| CN111719579A (en) * | 2020-06-02 | 2020-09-29 | 中国电建集团西北勘测设计研究院有限公司 | Post-water-injection vibration-compaction construction method for desert photovoltaic support pile foundation |
| CN113106966A (en) * | 2021-04-09 | 2021-07-13 | 上海友海建设工程有限公司 | High-bearing composite stiffness pile and construction method thereof |
| CN115977132A (en) * | 2023-01-05 | 2023-04-18 | 中国电建集团西北勘测设计研究院有限公司 | Construction method for non-static pressure type photovoltaic support prefabricated pipe pile foundation |
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| JPS55159019A (en) * | 1979-05-30 | 1980-12-10 | Ohbayashigumi Ltd | Method for stabilizing and solidifying sludge having hardening property at pit dug in ground |
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| CN202954373U (en) * | 2012-10-27 | 2013-05-29 | 江苏华源新能源科技有限公司 | Pile foundation structure of photovoltaic power station |
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| JPS55159019A (en) * | 1979-05-30 | 1980-12-10 | Ohbayashigumi Ltd | Method for stabilizing and solidifying sludge having hardening property at pit dug in ground |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695461A (en) * | 2015-02-10 | 2015-06-10 | 浙江中控太阳能技术有限公司 | Upright post-type heliostat mounting base and mounting method thereof |
| CN110409480A (en) * | 2019-07-26 | 2019-11-05 | 北京北控光伏科技发展有限公司 | A kind of construction method on the photovoltaic bracket basis in gravel place |
| CN110359450A (en) * | 2019-07-29 | 2019-10-22 | 中铁二院工程集团有限责任公司 | Assembled circle pilework and construction method |
| CN110359450B (en) * | 2019-07-29 | 2024-03-08 | 中铁二院工程集团有限责任公司 | Assembled round pile structure and construction method |
| CN111719579A (en) * | 2020-06-02 | 2020-09-29 | 中国电建集团西北勘测设计研究院有限公司 | Post-water-injection vibration-compaction construction method for desert photovoltaic support pile foundation |
| CN113106966A (en) * | 2021-04-09 | 2021-07-13 | 上海友海建设工程有限公司 | High-bearing composite stiffness pile and construction method thereof |
| CN115977132A (en) * | 2023-01-05 | 2023-04-18 | 中国电建集团西北勘测设计研究院有限公司 | Construction method for non-static pressure type photovoltaic support prefabricated pipe pile foundation |
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| CN102953392B (en) | 2015-12-02 |
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