CN103046585A - Method for testing horizontal force bearing capacity static load of foundation single pile of wind power plant fan - Google Patents
Method for testing horizontal force bearing capacity static load of foundation single pile of wind power plant fan Download PDFInfo
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Abstract
The invention relates to a method for testing a horizontal force bearing capacity static load of a foundation single pile of a wind power plant fan. The method comprises the following steps of: arranging a pile casing type concrete spouting pile to serve as a horizontal bearing capacity test pile of the foundation in the center of an inner circle with a first radius; arranging a concrete spouting pile to serve as a horizontal bearing capacity anchor pile at the first radius; arranging horizontal steel part bases at the anchor pile and the test pile, horizontally connecting a lifting jack between the horizontal steel part bases of the anchor pile and the test pile, supplying power to the lifting jack through an electric high-pressure oil pump, loading a load to the anchor pile and the test pile so as to perform a horizontal bearing capacity static load test through the lifting jack, acquiring a load value and a test pile displacement value through a pressure sensor and a displacement sensor, recording and displaying the test pile load and the test pile displacement value through a computer, and determining a foundation structure of the wind power plant fan; and horizontally arranging the lifting jack between the anchor pile and the test pile, arranging a levelness detection sensor on a lifting jack connecting piece, and detecting the displacement of the test pile or the anchor pile through the levelness detection sensor. The method is high in safety and reasonable in cost.
Description
Technical field
The present invention relates to a kind of wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method of land coastal beach drift sand weak soil blower foundation casing technique, particularly beach drift sand soft foundation blower foundation pile casing type cast-in-place concrete pile horizontal bearing capacity test pile.
Background technology
Dongfang sense city wind energy turbine set is located in the South Sea, belongs to tropical moistening monsoon marine climate, take high temperature and rainy and typhoon as principal character, extreme wind speed 59.0m/s belongs to II class wind field, and the wind field geological conditions belongs to coastal beach drift sand zone, Site Soil is weak soil, complex geologic conditions.Because the coastal typhoon influence that is subjected to, its blower fan, pylon, blower foundation etc. all need special reinforcement design, so that blower foundation is safe and reliable.
At coastal beach drift sand soft soil area and in II class wind field and typhoon regional construction wind energy turbine set, technological borrowing is not all arranged both at home and abroad, the blower fan large to installed capacity particularly, complex geologic conditions, Site Soil are the drift sand soft foundation, whether can satisfy bearing capacity and inclination requirement to the basic foundation processing scheme, pile foundation construction process and horizontal bearing capacity test pile have all been proposed very high requirement.
Summary of the invention
The purpose of this invention is to provide a kind of horizontal bearing capacity test pile good manufacturability, soft base basis is safe, and cost is reasonable, is adapted to the wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method in coastal beach drift sand zone.
The object of the present invention is achieved like this, and wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method is characterized in that: establish and arrange in the inner circle center of circle of the first radius that 1 pile casing type cast-in-place concrete pile is as this basic horizontal bearing capacity test pile; If the first radius arranges that 1 cast-in-place concrete pile is as the horizontal bearing capacity anchoring pile; At anchoring pile and test pile horizontal steel part base is set, the jack level connection joint is between the horizontal steel part base of anchoring pile and test pile, supply with power by electric high-voltage pump to jack, by jack load is loaded into and carries out the horizontal bearing capacity static loading test on anchoring pile and the test pile, obtain payload values and test pile shift value by pressure sensor and displacement transducer, determine wind electric field fan foundation structure by computer recording and demonstration test pile load, test pile shift value; Jack horizontal positioned between anchoring pile and test pile, the levelness detecting sensor is arranged on the jack connector, detect test pile or anchoring pile displacement by the levelness detecting sensor, when the anchoring pile displacement is large, the horizontal angle that the levelness detecting sensor detects tilts to anchoring pile, when the test pile displacement was large, the horizontal angle that the levelness detecting sensor detects tilted to test pile, obtains the horizontal movement of test pile by Triangle Formula.
Described horizontal bearing capacity of single pile static loading test comprises destructive testing and nondestructive testing.
Described destructive testing: arrange a test pile at base center point, arrange 1 anchoring pile at the vertical lateral shaft of test pile, 1 anchoring pile stake footpath Φ 1000mm, the long L=25～30m of stake, the test pile bearing capacity of single pile is about 250kN, and destructive testing test pile maximum load limiting value is 750kN.
Described nondestructive testing: arrange a test pile at base center point, arrange four anchoring piles at the vertical lateral shaft of test pile, stake footpath Φ 1000mm, the long L=25～30m of stake, nondestructive testing test pile bearing capacity of single pile is about 250kN, and test pile maximum load limiting value is 500kN.
Described horizontal bearing capacity test pile top spiral bar spacing 200mm, horizontal bearing capacity test pile length direction stirrup spacing 2000mm, horizontal bearing capacity test pile length direction spiral bar diameter d=10mm, horizontal bearing capacity test pile length direction master muscle diameter d=22mm, horizontal bearing capacity test pile length computation be the required upper load that bears in conjunction with direction master's muscle of side friction and end resistance, the employing pile casing type of horizontal bearing capacity test pile is in conjunction with the construction technology of retaining wall.
The described horizontal bearing capacity anchoring pile top spiral bar spacing 150mm that establishes, the described horizontal bearing capacity anchoring pile length direction stirrup spacing 1500mm that establishes, the described horizontal bearing capacity anchoring pile length direction spiral bar diameter d=12mm that establishes, the described horizontal bearing capacity anchoring pile length direction master muscle diameter d=25mm that establishes, the employing pile casing type of described horizontal bearing capacity anchoring pile is in conjunction with the construction technology of retaining wall.
Described horizontal bearing capacity distance between the anchor pile and the test pile: 3100mm.
Described horizontal bearing capacity space of anchor pile: 0mm
Advantage of the present invention is: establish and arrange in the inner circle center of circle of the first radius that 1 pile casing type cast-in-place concrete pile is as this basic horizontal bearing capacity test pile; If the first radius arranges that 1 cast-in-place concrete pile is as the horizontal bearing capacity anchoring pile; Provide reaction beam by 1 anchoring pile, supply with power by electric high-voltage pump to jack, by jack load is loaded on the test pile that central point arranges and carries out the horizontal bearing capacity of single pile static loading test, obtain payload values and test pile shift value by pressure sensor and displacement transducer, determine wind electric field fan foundation structure by computer recording and demonstration test pile load, ftercompction shift value.The present invention is in conjunction with the horizontal bearing capacity of single pile static loading test test pile scheme of actual seat in the plane preferred arrangement, accelerated programming, foundation in actual seat in the plane is done test pile, reflected more truly the bearing capacity of foundation soil situation of machine for the basis, pile testing method according to such layout, the test pile experiment conclusion that draws has been reacted the reasonability of safety, economy and the structure of Design of Foundation really.
Description of drawings
The invention will be further described below in conjunction with the drawings and the specific embodiments:
Fig. 1 is embodiment of the invention foundation level bearing capacity test pile, anchoring pile plan view;
Fig. 2 is embodiment of the invention foundation level bearing capacity test pile, anchoring pile sectional drawing;
Fig. 3 is the test pile structure chart of Fig. 1;
Fig. 4 is Fig. 1 anchoring pile pile body section;
Among the figure: 1, wind electric field blower foundation; 2, test pile; 3, anchoring pile; 4, engineering pile.
The specific embodiment
As shown in Figure 1, wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method: establish and arrange in the inner circle center of circle of the first radius that 1 pile casing type cast-in-place concrete pile is as this basic horizontal bearing capacity test pile 2; Excellent first radius of establishing arranges that 1 cast-in-place concrete pile is as horizontal bearing capacity anchoring pile 3; At anchoring pile 3 and test pile 2 horizontal steel part base is set, the jack level connection joint is between the horizontal steel part base of anchoring pile 3 and test pile 2, supply with power by electric high-voltage pump to jack, jack is loaded into load on anchoring pile 3 and the test pile 2 and carries out the horizontal bearing capacity static loading test, obtain payload values and test pile shift value by pressure sensor and displacement transducer, determine wind electric field fan foundation structure by computer recording and demonstration test pile 2 loads, test pile shift value.
Jack horizontal positioned between anchoring pile 3 and test pile 2, the levelness detecting sensor is arranged on the jack connector, detect test pile 2 or anchoring pile 3 displacements by the levelness detecting sensor, when anchoring pile 3 displacements are large, the horizontal angle that the levelness detecting sensor detects tilts to anchoring pile 3, when test pile 2 displacements were large, the horizontal angle that the levelness detecting sensor detects tilted to test pile 2, obtains the horizontal movement of test pile 2 by Triangle Formula.
As shown in Figure 2, comprise: test pile 2, anchoring pile 3 and 4, four anchoring piles 3 of engineering pile are distributed on the circumference of the first radius by 90 degree, and engineering pile 4 is distributed on the circumference of the second radius, the second radius is greater than the first radius, and the circle center of the circumference of the first radius and the second radius is concentric with test pile 2.Engineering pile 4 highly is lower than test pile 2 and anchoring pile 3, and test pile 2 and anchoring pile 3 height faces flush.Engineering pile 4 is covered by wind electric field blower foundation 1, and test pile 2, anchoring pile 3 exceed wind electric field blower foundation 1.
The horizontal bearing capacity of single pile static loading test comprises destructive testing and nondestructive testing.
Destructive testing: arrange a test pile at base center point, arrange 1 anchoring pile at the vertical lateral shaft of test pile, 1 anchoring pile stake footpath Φ 1000mm, the long L=25～30m of stake, the test pile bearing capacity of single pile is about 250kN, and destructive testing test pile maximum load limiting value is 750kN.
Nondestructive testing: arrange a test pile at base center point, arrange 1 anchoring pile at the vertical lateral shaft of test pile, stake footpath Φ 1000mm, the long L=25～30m of stake, nondestructive testing test pile bearing capacity of single pile is about 250kN, and test pile maximum load limiting value is 500kN.
As shown in Figure 3, described horizontal bearing capacity test pile top spiral bar spacing 200mm, horizontal bearing capacity test pile length direction stirrup spacing 2000mm, horizontal bearing capacity test pile length direction spiral bar diameter d=10mm, horizontal bearing capacity test pile length direction master muscle diameter d=22mm, horizontal bearing capacity test pile length computation be the required upper load that bears in conjunction with direction master's muscle of side friction and end resistance, the employing pile casing type of horizontal bearing capacity test pile is in conjunction with the construction technology of retaining wall.
As shown in Figure 4, the described horizontal bearing capacity anchoring pile top spiral bar spacing 150mm that establishes, the described horizontal bearing capacity anchoring pile length direction stirrup spacing 1500mm that establishes, the described horizontal bearing capacity anchoring pile length direction spiral bar diameter d=12mm that establishes, the described horizontal bearing capacity anchoring pile length direction master muscle diameter d=25mm that establishes, the employing pile casing type of described horizontal bearing capacity anchoring pile is in conjunction with the construction technology of retaining wall.
Horizontal bearing capacity space of anchor pile: 0mm.
Horizontal bearing capacity distance between the anchor pile and the test pile: 3100mm.
Horizontal bearing capacity of single pile static loading test test pile scheme in conjunction with actual seat in the plane preferred arrangement, accelerated programming, foundation in actual seat in the plane is done test pile, reflected more truly the bearing capacity of foundation soil situation of machine for the basis, pile testing method according to such layout, the test pile experiment conclusion that draws has been reacted the reasonability of safety, economy and the structure of Design of Foundation really.
The test result of actual seat in the plane:
The 203# stake: when trial load added to 675kN, Horizontal Displacement was 19.81 ㎜, and H-Y0 curve is slow change type, and Y0-logt curve is parallel or inferior and is arranged in parallel; : when trial load added to 750kN, Horizontal Displacement was 35.63mm, and foundation soil strength destroys, so termination test.This horizontal limeit bearing capacity of synthetic determination is 675kN;
The 208# stake: when trial load added to 500kN, Horizontal Displacement was 17.45 ㎜, and H-Y0 curve is slow change type, and Y0-logt curve is parallel or inferior and is arranged in parallel; Reached the maximum loading value of design, so termination test.This horizontal limeit of synthetic determination bearing capacity＞500kN;
This shows that the horizontal static loading test failure of 203# blower fan single pile, failure mode are that foundation soil strength destroys, horizontal bearing capacity of single pile is subjected to a upper soil horizon strength control.Horizontal bearing capacity of single pile static loading test data see attached list 1.
The horizontal results of dead load summary sheet of table 1 single pile
The parts that present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not one by one narration.
Claims (8)
1. wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method is characterized in that: establish in the inner circle center of circle of the first radius and arrange that 1 pile casing type cast-in-place concrete pile is as this basic horizontal bearing capacity test pile; If the first radius arranges that 1 cast-in-place concrete pile is as the horizontal bearing capacity anchoring pile; At anchoring pile and test pile horizontal steel part base is set, the jack level connection joint is between the horizontal steel part base of anchoring pile and test pile, supply with power by electric high-voltage pump to jack, by jack load is loaded into and carries out the horizontal bearing capacity static loading test on anchoring pile and the test pile, obtain payload values and test pile shift value by pressure sensor and displacement transducer, determine wind electric field fan foundation structure by computer recording and demonstration test pile load, test pile shift value; Jack horizontal positioned between anchoring pile and test pile, the levelness detecting sensor is arranged on the jack connector, detect test pile or anchoring pile displacement by the levelness detecting sensor, when the anchoring pile displacement is large, the horizontal angle that the levelness detecting sensor detects tilts to anchoring pile, when the test pile displacement was large, the horizontal angle that the levelness detecting sensor detects tilted to test pile, obtains the horizontal movement of test pile by Triangle Formula.
2. wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method according to claim 1, it is characterized in that: described horizontal bearing capacity of single pile static loading test comprises destructive testing and nondestructive testing.
3. wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method according to claim 2, it is characterized in that: described destructive testing: arrange a test pile at base center point, arrange 1 anchoring pile at the vertical lateral shaft of test pile, 1 anchoring pile stake footpath Φ 1000mm, long L=25～the 30m of stake, the test pile bearing capacity of single pile is about 250kN, and destructive testing test pile maximum load limiting value is 750kN.
4. wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method according to claim 2, it is characterized in that: described nondestructive testing: arrange a test pile at base center point, arrange four anchoring piles at the vertical lateral shaft of test pile, stake footpath Φ 1000mm, long L=25～the 30m of stake, nondestructive testing test pile bearing capacity of single pile is about 250kN, and test pile maximum load limiting value is 500kN.
5. wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method according to claim 1, it is characterized in that: described horizontal bearing capacity test pile top spiral bar spacing 200mm, horizontal bearing capacity test pile length direction stirrup spacing 2000mm, horizontal bearing capacity test pile length direction spiral bar diameter d=10mm, horizontal bearing capacity test pile length direction master muscle diameter d=22mm, horizontal bearing capacity test pile length computation be the required upper load that bears in conjunction with direction master's muscle of side friction and end resistance, the employing pile casing type of horizontal bearing capacity test pile is in conjunction with the construction technology of retaining wall.
6. wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method according to claim 1, it is characterized in that: the described horizontal bearing capacity anchoring pile top spiral bar spacing 150mm that establishes, the described horizontal bearing capacity anchoring pile length direction stirrup spacing 1500mm that establishes, the described horizontal bearing capacity anchoring pile length direction spiral bar diameter d=12mm that establishes, the described horizontal bearing capacity anchoring pile length direction master muscle diameter d=25mm that establishes, the employing pile casing type of described horizontal bearing capacity anchoring pile is in conjunction with the construction technology of retaining wall.
7. wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method according to claim 1 is characterized in that: described horizontal bearing capacity distance between the anchor pile and the test pile: 3100mm.
8. wind electric field blower foundation single pile horizontal force bearing capacity Static Load Test Method according to claim 1 is characterized in that: described horizontal bearing capacity space of anchor pile: 0mm.
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Cited By (7)
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| CN103870692A (en) * | 2014-03-17 | 2014-06-18 | 上海岩土工程勘察设计研究院有限公司 | Pile foundation horizontal carrying force simplified calculation method |
| CN104563170A (en) * | 2015-01-14 | 2015-04-29 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power generation mono-pile foundation horizontal bearing capacity test counterforce device and construction method thereof |
| CN105178309A (en) * | 2015-07-06 | 2015-12-23 | 华东交通大学 | Internal force calculation method for single inverted stepped variable-cross-section pile |
| CN105200987A (en) * | 2015-07-05 | 2015-12-30 | 华东交通大学 | Inverted-ladder-shaped variable-section single-pile vertical bearing character analysis method |
| CN107794957A (en) * | 2017-11-24 | 2018-03-13 | 中交上海港湾工程设计研究院有限公司 | The horizontal static load device of super-large diameter single-pile foundation and test method |
| CN110565704A (en) * | 2019-08-12 | 2019-12-13 | 中国能源建设集团江苏省电力设计院有限公司 | method for calculating horizontal loading force of single pile in static load test of fan |
| CN114000551A (en) * | 2021-12-17 | 2022-02-01 | 中国华能集团清洁能源技术研究院有限公司 | Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103870692A (en) * | 2014-03-17 | 2014-06-18 | 上海岩土工程勘察设计研究院有限公司 | Pile foundation horizontal carrying force simplified calculation method |
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| CN104563170A (en) * | 2015-01-14 | 2015-04-29 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power generation mono-pile foundation horizontal bearing capacity test counterforce device and construction method thereof |
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| CN105178309A (en) * | 2015-07-06 | 2015-12-23 | 华东交通大学 | Internal force calculation method for single inverted stepped variable-cross-section pile |
| CN105178309B (en) * | 2015-07-06 | 2017-05-17 | 华东交通大学 | Internal force calculation method for single inverted stepped variable-cross-section pile |
| CN107794957A (en) * | 2017-11-24 | 2018-03-13 | 中交上海港湾工程设计研究院有限公司 | The horizontal static load device of super-large diameter single-pile foundation and test method |
| CN110565704A (en) * | 2019-08-12 | 2019-12-13 | 中国能源建设集团江苏省电力设计院有限公司 | method for calculating horizontal loading force of single pile in static load test of fan |
| CN114000551A (en) * | 2021-12-17 | 2022-02-01 | 中国华能集团清洁能源技术研究院有限公司 | Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method |
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