CN102953392B - A kind of pile foundation structure of photovoltaic plant and pile foundation construction technique - Google Patents
A kind of pile foundation structure of photovoltaic plant and pile foundation construction technique Download PDFInfo
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- CN102953392B CN102953392B CN201210416525.4A CN201210416525A CN102953392B CN 102953392 B CN102953392 B CN 102953392B CN 201210416525 A CN201210416525 A CN 201210416525A CN 102953392 B CN102953392 B CN 102953392B
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Abstract
The invention provides a kind of pile foundation structure of photovoltaic plant, it is applicable to the construction of the photovoltaic plant in the more complicated barren beach area, Gobi desert of geologic structure, it is characterized in that: it comprises prefabricated piling bar and the stake holes vertical with Earth surface plane, prefabricated piling bar is installed in stake holes and in prefabricated piling bar inserts bottom stake holes soil layer, top elevates above the soil, built layer of concrete between the hole wall of stake holes and prefabricated piling bar, the backfill of layer of concrete top has closely knit plain soil layer.Present invention also offers the construction technology of this kind of photovoltaic plant pile foundation, its construction technology is simple, cost is low, survivable ecological environment.A kind of construction technology of photovoltaic plant pile foundation, it is characterized in that: first adopt large excavator to drill through stake holes, then prefabricated piling bar is inserted soil layer bottom stake holes again to concreting in stake holes by stake holes, and concreting limit, limit vibrator vibrates, finally backfill plain soil pressure on layer of concrete top real.
Description
Technical field
The present invention relates to 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 first excavation pit, then in foundation ditch, foundation forms is assembled into box-shaped, concreting in box-shaped template again, stripping after concrete curing expires, its construction technology is simple, but it is more single that it is only applicable to geologic structure, the area that soil property is relatively soft, for NORTHWEST CHINA hinterland, particularly Gobi desert barren beach area, due to such regional geology complex structure, soil property is hard, and containing a large amount of rubble in stratum, therefore its difficulty of construction is large, efficiency is low, cost is high, in addition, carry out large-scale excavation of foundation pit in such area, meeting heavy damage surface vegetation, thus 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 the more complicated barren beach area, Gobi desert of geologic structure, for this reason, present invention also offers the construction technology of this kind of 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 holes vertical with Earth surface plane, described prefabricated piling bar is installed in described stake holes and in described prefabricated piling bar inserts bottom described stake holes soil layer, top elevates above the soil, built layer of concrete between the hole wall of described stake holes and described prefabricated piling bar, the backfill of described layer of concrete top 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; The length L of described prefabricated piling bar is greater than described stake holes depth H at least 20cm; Described prefabricated piling bar upper end is provided with 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: first adopt large excavator to drill through stake holes, then prefabricated piling bar is inserted soil layer bottom described stake holes again to concreting in described stake holes by described stake holes, and concreting limit, limit vibrator vibrates, finally backfill plain soil pressure on layer of concrete top real.
It is further characterized in that:
When described large excavator drills through stake holes, boring limit, limit is to water filling in described stake holes;
The digging arm end of described large excavator is provided with drilling rod, and described drilling rod front end is provided 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 of described stake holes, wherein central pile is not more than ± 40mm, skirt piles are not more than ± 30mm, stake holes degree of depth allowable variation+100mm, vertical degree of the peg hole allowable variation≤0.01L, sediment thickness≤50mm at the bottom of stake holes hole; Described strength grade of concrete C20.
Photovoltaic plant pile foundation structure of the present invention, its prefabricated piling bar through the stake holes vertical with floor, insert soil layer bottom stake holes bottom it, top concreting with plain earthen backfill compacting, photovoltaic power plant bracket directly with the support mounting flange connection at prefabricated piling bar top, its structure is simple, supporting stabilizer; The pile body of prefabricated piling bar has the resistance to plucking tongue and groove of annular, more effectively can ensure stable support; Its construction does not need to carry out large-area excavation of foundation pit, by means of only large excavator configuration drilling rod and drill bit, vertical drilling is carried out to ground, again prefabricated piling bar is inserted soil layer by this vertical drilling, by concreting and the closely knit backfill of element soil prefabricated piling bar is fixed in vertical drilling again and ensures that it is reliable and stable, its construction is convenient, efficiency of construction is high, and large area will be caused to damage to surface vegetation, effectively ensure environment; When drilling through stake holes, boring limit in limit is to water filling in stake holes, and the silt particle in stake holes can be made to meet cement admittedly, particularly for the barren beach area, Gobi desert that gravel content is larger, advantageously in the shaping of stake holes, guarantees the subsequent construction of pile foundation.
Accompanying drawing explanation
Fig. 1 is photovoltaic plant pile foundation structure schematic diagram in the present invention.
Detailed description of the invention
See Fig. 1, photovoltaic plant pile foundation structure of the present invention it comprise the stake holes 1 vertical with Earth surface plane and prefabricated piling bar 2, prefabricated piling bar 2 is installed in stake holes 1 and in prefabricated piling bar 2 inserts bottom stake holes soil layer, top elevates above the soil, built layer of concrete 3 between the hole wall of stake holes 2 and prefabricated piling bar, the backfill of layer of concrete 3 top has 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 holes 1 depth H at least 20cm; Prefabricated piling bar 2 upper end is provided with support mounting flange 5, and prefabricated piling bar 2 pile body surface has the resistance to plucking tongue and groove 6 of annular.
Photovoltaic plant pile foundation construction technique of the present invention: first adopt large excavator to drill through stake holes, large excavator is installed drilling rod and drill bit, held stationary is needed when excavator is in place, not run-off the straight and displacement, and keep drilling rod perpendicular to the ground, the stake holes center deviation wherein drilled through should meet central pile and be not more than ± 40mm, skirt piles are not more than ± 30mm, stake holes depth H allowable variation+100mm, vertical degree of the peg hole allowable variation≤0.01L, sediment thickness≤50mm at the bottom of stake holes hole, when holing, boring limit, limit is to water filling in stake holes, admittedly pile hole forming is guaranteed to make the silt particle mud in hole, then prefabricated piling bar is inserted in stake holes the soil layer of below stake holes, C20 layer of concrete is built again between stake holes wall and prefabricated piling bar, concreting limit, limit vibrator vibrates, finally backfill element soil on layer of concrete.
Claims (1)
1. the construction technology of a photovoltaic plant pile foundation, it is characterized in that: first adopt large excavator to drill through stake holes, then prefabricated piling bar is inserted soil layer bottom described stake holes again to concreting in described stake holes by described stake holes, and concreting limit, limit vibrator vibrates, finally backfill plain soil pressure on layer of concrete top real; When described large excavator drills through stake holes, boring limit, limit is to water filling in described stake holes; The center deviation of described stake holes, wherein central pile is not more than ± 40mm, skirt piles are not more than ± 30mm, stake holes degree of depth allowable variation+100mm, vertical degree of the peg hole allowable variation≤0.01L, sediment thickness≤50mm at the bottom of stake holes hole; Described strength grade of concrete C20; The digging arm end of described large excavator is provided with drilling rod, and described drilling rod front end is provided 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.
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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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| 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 CN102953392A (en) | 2013-03-06 |
| CN102953392B true CN102953392B (en) | 2015-12-02 |
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| CN104695461B (en) * | 2015-02-10 | 2016-09-28 | 浙江中控太阳能技术有限公司 | A kind of column heliostat installs pedestal and installation 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 |
| 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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