CN102251533A - Spiral ribbed steel pipe concrete pre-pressed composite oblique pile foundation and construction method - Google Patents
Spiral ribbed steel pipe concrete pre-pressed composite oblique pile foundation and construction method Download PDFInfo
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- CN102251533A CN102251533A CN 201110122584 CN201110122584A CN102251533A CN 102251533 A CN102251533 A CN 102251533A CN 201110122584 CN201110122584 CN 201110122584 CN 201110122584 A CN201110122584 A CN 201110122584A CN 102251533 A CN102251533 A CN 102251533A
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Abstract
The invention discloses a spiral ribbed steel pipe concrete pre-pressed composite oblique pile foundation and a construction method, and relates to a composite oblique pile foundation and a construction method. The invention solves the problems that the consumption of a bearing material for the conventional vertical group pile foundation is high, the conventional oblique construction drilling perfusion pile is difficult to implement and the quality of a pile body cannot be ensured. Each spiral ribbed steel pipe is obliquely drilled into the soil through a through hole at the corresponding position of a pre-pressing plate, a plurality of transverse H-shaped steels are fixedly arranged on the outer surface of the pre-pressing plate, two transverse H-shaped steels are arranged in parallel at two sides of the spiral ribbed steel pipes of each row, and a plurality of guniting holes are uniformly machined on the wall of each spiral ribbed steel pipe drilled into the soil. The method comprises the following steps of: 1, performing preservative treatment; 2, sequentially and obliquely drilling the spiral ribbed steel pipes into the soil; 3, arranging the pre-pressing plate; 4, arranging the transverse H-shaped steels, and tensioning the spiral ribbed steel pipes; 5, injecting pressure cement paste; and 6, pouring concrete, the strength grade of which is not less than C30. The pile foundation is applied to soft foundation soil of cohesive soil and sandy soil under building and bridge foundation abutments.
Description
Technical field
Invention relates to compound taper pile base of a kind of precompressed and job practices.
Background technology
Structure often have very big horizontal applied force to import in the foundation soil on the underground basis of public building, railroad bridge, when the ground soil layer is cohesive soil or sandy soil, vertical clump of piles base bears horizontal applied force under the existing pile foundation employing steel reinforced concrete cushion cap, when the vertical pile of application is subjected to horizontal thrust, stake diameter 0.4～0.8m, because the horizontal applied force that pile foundation is born only for 1/tens of vertical compression bearing capacity, causes the loading material consumption of existing vertical clump of piles base big; Existing oblique construction drill is irritated the piling performance difficulty, and pile quality can't guarantee.
Summary of the invention
The present invention irritates the piling performance difficulty for the big and existing oblique construction drill of the loading material consumption that solves existing vertical clump of piles base, and the problem that pile quality can't guarantee provides compound taper pile base of a kind of helix rib steel pipe concrete precompressed and job practices.
The present invention solves the problems of the technologies described above the technical scheme of taking to be:
The compound taper pile base of helix rib steel pipe concrete of the present invention precompressed is by prefabricating plate, a plurality of i iron and a plurality of spiral fin steel tube are formed, described prefabricating plate is pressed on the inclined-plane of the soil body, the thickness direction of described prefabricating plate upper edge prefabricating plate is processed with a plurality of through holes of arranging by matrix, the quantity of through hole is provided with the quantity of spiral fin steel tube is consistent, each spiral fin steel tube tilts to pierce in the soil body through the through hole of relevant position on the prefabricating plate, described a plurality of i iron is packed on the external surface of prefabricating plate, the both sides of every row's spiral fin steel tube are arranged with two i iron in parallel, pierce and uniformly on the tube wall of each spiral fin steel tube in the soil body be processed with a plurality of gunniting holes, in each spiral fin steel tube, irritate press water mud is arranged, press water mud is injected in the soil body by each gunniting hole, angle between each spiral fin steel tube and the horizontal plane is 5～85 °, and the pipe diameter of described spiral fin steel tube is 102～180mm.
The job practices of the compound taper pile base of helix rib steel pipe concrete of the present invention precompressed realizes according to following steps:
Step 4, with a plurality of i iron secured in parallel on the external surface of prefabricating plate, the stretch-draw steel pipe applies constant precompression to i iron, the precompression value is got steel pipe tensile strength design load, stretch-draw end to a plurality of spiral fin steel tubes carries out tensioning fixation successively again, repeat tensioning fixation and hold till lotus tends towards stability soil body compression, lay down anchor lock and i iron;
Step 6, the stretch-draw end with each spiral fin steel tube pours into the concrete that strength grade is not less than C30 at last.
The invention has the beneficial effects as follows:
The compound taper pile base of helix rib steel pipe concrete of the present invention precompressed adopts spiral fin steel tube to tilt to pierce in the soil body, realized that the compound taper pile base of helix rib steel pipe concrete precompressed bears horizontal applied force, contrasted by horizontal thrust with the vertical pile of existing application, a conversion stake diameter only was 0.24m when equal stake was long, and concrete material consumption of the present invention only is 1/12nd of existing vertical pile foundation; Rolled steel dosage is saved and is reached 35%;
The job practices of the compound taper pile base of helix rib steel pipe concrete of the present invention precompressed is implemented convenient, has guaranteed the quality of pile body.
Description of drawings
Fig. 1 is that the overall structure master of the compound taper pile base of helix rib steel pipe concrete of the present invention precompressed looks schematic diagram, Fig. 2 be the I of Fig. 1 to view, Fig. 3 is the overall structure schematic diagram of spiral fin steel tube, Fig. 4 is that the I of Fig. 2 is to view (laying down i iron).
The specific embodiment
The specific embodiment one: shown in Fig. 1～3, the compound taper pile base of helix rib steel pipe concrete precompressed of present embodiment is by prefabricating plate 1, a plurality of i iron 2 and a plurality of spiral fin steel tube 3 are formed, described prefabricating plate 1 is pressed on the inclined-plane of the soil body 4, the thickness direction of described prefabricating plate 1 upper edge prefabricating plate 1 is processed with a plurality of through hole 1-1 that arrange by matrix, the consistent setting of quantity of the quantity of through hole 1-1 and spiral fin steel tube 3, each spiral fin steel tube 3 tilts to pierce in the soil body 4 through the through hole 1-1 of relevant position on the prefabricating plate 1, described a plurality of i iron 2 is packed on the external surface of prefabricating plate 1, the both sides of every row's spiral fin steel tube 3 are arranged with two i iron 2 in parallel, pierce and uniformly on the tube wall of each spiral fin steel tube 3 in the soil body 4 be processed with a plurality of gunniting hole 3-3, in each spiral fin steel tube 3, irritate press water mud 5 is arranged, press water mud 5 is injected in the soil body 4 by each gunniting hole 3-3, angle α between each spiral fin steel tube 3 and the horizontal plane is 5～85 °, and the pipe diameter d of described spiral fin steel tube 3 is 102～180mm.
Described prefabricating plate is the steel concrete prefabricating plate.
The diameter of through hole 1-1 is D on the prefabricating plate 1, and spiral fin steel tube 3 is not less than 50mm with the space of through hole 1-1; The interval S of two spiral fin steel tubes 3 is not less than 7d.
The specific embodiment two: as shown in figures 1 and 3, present embodiment spiral fin steel tube 3 is made of steel pipe main body 3-1 and a plurality of helical blade 3-2, and a plurality of helical blade 3-2 are uniform to be packed on the outer wall of steel pipe main body 3-1.So design, it is compacted to carry out tension and compression to the soil body 4 by a plurality of helical blade 3-2 shearing diffusion transmission.Other compositions and annexation are identical with the specific embodiment one.
The specific embodiment three: as shown in figures 1 and 3, the thickness t of present embodiment helical blade 3-2 is 5mm, and between adjacent two helical blade 3-2 is 200mm apart from n.So design is convenient to spiral fin steel tube 3 and is pierced the soil body 4.Other composition and annexation are identical with the specific embodiment two.
The specific embodiment four: as shown in figures 1 and 3, the diameter phi of the gunniting hole 3-3 of present embodiment is 9mm.So design can pour into cement paste by gunniting hole 3-3 in the soil body 4, irritates the space that pulls of real helical blade 3-2 and stake end.Other compositions and annexation are identical with the specific embodiment one, two or three.
The specific embodiment five: as shown in Figure 1, the thickness h of the described prefabricating plate 1 of present embodiment is 150～300mm.So design, can guarantee the rigidity of prefabricating plate.Other compositions and annexation are identical with the specific embodiment four.
The specific embodiment six: as shown in Figure 3, present embodiment has the length L 1 of helix rib steel pipeline section of helical blade 3-2, and not have the ratio of length L 2 of the lengths of steel pipes of helical blade 3-2 be 3: 1 with being positioned at the soil body 4.So design has spiral ribs can hinder the prefabricating plate displacement for fear of the L2 section of spiral fin steel tube 3, and the space must irritate real between the steel pipe L2 section and the soil body when being pressed into cement paste.Other compositions and annexation are identical with the specific embodiment two, three or five.
The specific embodiment seven: shown in Fig. 1～4, the step of the job practices of the compound taper pile base of helix rib steel pipe concrete precompressed of present embodiment is as follows:
Step 4, with a plurality of i iron 2 secured in parallel on the external surface of prefabricating plate 1,3 pairs of i iron 2 of stretch-draw steel pipe apply constant precompression, the precompression value is got steel pipe tensile strength design load, stretch-draw end to a plurality of spiral fin steel tubes 3 carries out tensioning fixation successively again, repeat tensioning fixation and hold till lotus tends towards stability the soil body 4 compressions, lay down anchor lock and i iron;
Step 6, the stretch-draw end with each spiral fin steel tube 3 pours into the concrete that strength grade is not less than C30 at last.
But step 5 and step 6 blocked operation.
The specific embodiment eight: between prefabricating plate 1 and i iron 2 the steel plate cushion block is set in the present embodiment step 4, the thickness of steel plate cushion block is 10～20mm.So operation, the soil body 4 when applying precompression in the middle of two spiral fin steel tubes of the preferential compression of meeting 3.
Claims (8)
1. the compound taper pile base of helix rib steel pipe concrete precompressed, it is characterized in that: described compound taper pile base is by prefabricating plate (1), a plurality of i iron (2) and a plurality of spiral fin steel tube (3) are formed, described prefabricating plate (1) is pressed on the inclined-plane of the soil body (4), the thickness direction of described prefabricating plate (1) upper edge prefabricating plate (1) is processed with a plurality of through holes (1-1) of arranging by matrix, the consistent setting of quantity of the quantity of through hole (1-1) and spiral fin steel tube (3), the through hole (1-1) that each spiral fin steel tube (3) is gone up the relevant position through prefabricating plate (1) tilts to pierce in the soil body (4), described a plurality of i iron (2) is packed on the external surface of prefabricating plate (1), the both sides of every row's spiral fin steel tube (3) are arranged with two i iron (2) in parallel, pierce the uniform a plurality of gunniting holes (3-3) that are processed with on the tube wall of each spiral fin steel tube (3) in the soil body (4), in each spiral fin steel tube (3), irritate press water mud (5) is arranged, press water mud (5) is injected in the soil body (4) by each gunniting hole (3-3), angle (α) between each spiral fin steel tube (3) and the horizontal plane is 5～85 °, and the pipe diameter (d) of described spiral fin steel tube (3) is 102～180mm.
2. the compound taper pile base of helix rib steel pipe concrete according to claim 1 precompressed, it is characterized in that: spiral fin steel tube (3) is made of steel pipe main body (3-1) and a plurality of helical blade (3-2), and a plurality of helical blades (3-2) are uniform to be packed on the outer wall of steel pipe main body (3-1).
3. the compound taper pile base of helix rib steel pipe concrete according to claim 2 precompressed is characterized in that: the thickness (t) of helical blade (3-2) is 5mm, and the distance (n) between adjacent two helical blades (3-2) is 200mm.
4. according to claim 1, the compound taper pile base of 2 or 3 described helix rib steel pipe concrete precompressed, it is characterized in that: the diameter (φ) of gunniting hole (3-3) is 9mm.
5. the compound taper pile base of helix rib steel pipe concrete according to claim 4 precompressed is characterized in that: the thickness (h) of described prefabricating plate (1) is 150～300mm.
6. according to claim 2, the compound taper pile base of 3 or 5 described helix rib steel pipe concrete precompressed, it is characterized in that: not have the ratio of length (L2) of the lengths of steel pipes of helical blade (3-2) be 3: 1 with being positioned at the soil body (4) to have the length (L1) of helix rib steel pipeline section of helical blade (3-2).
7. the job practices of the compound taper pile base of the described helix rib steel pipe concrete of arbitrary claim precompressed in the claim 1～7 is characterized in that the step of job practices of the compound taper pile base of helix rib steel pipe concrete precompressed is as follows:
Step 1, each spiral fin steel tube (3) is done preservative treatment, ooze on the surface of each spiral fin steel tube (3) and be coated with one deck anticorrisive agent;
Step 2, each spiral fin steel tube (3) is tilted to pierce in the soil body (4) successively, guarantee to be arranged in parallel between the spiral fin steel tube (3);
Step 3, prefabricating plate (1) is pressed on the inclined-plane of the soil body (4), the stretch-draw end of each spiral fin steel tube (3) is passed prefabricating plate (1);
Step 4, with a plurality of i iron (2) secured in parallel on the external surface of prefabricating plate (1), stretch-draw steel pipe (3) applies constant precompression to i iron (2), the precompression value is got steel pipe tensile strength design load, stretch-draw end to a plurality of spiral fin steel tubes (3) carries out tensioning fixation successively again, repeat tensioning fixation and hold till lotus tends towards stability the soil body (4) compression, lay down anchor lock and i iron (2);
Step 5, sealing steel pipe stretch-draw termination, from stretch-draw end injection pressure cement paste (5), the pressure limit of press water mud (5) is 3～6Mpa with each spiral fin steel tube (3);
Step 6, the stretch-draw end with each spiral fin steel tube (3) pours into the concrete that strength grade is not less than C30 at last.
8. the job practices of the compound taper pile base of helix rib steel pipe concrete according to claim 7 precompressed is characterized in that between prefabricating plate (1) and i iron (2) the steel plate cushion block being set in the step 4, and the thickness of steel plate cushion block is 10～20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110122584A CN102251533B (en) | 2011-05-12 | 2011-05-12 | Spiral ribbed steel pipe concrete pre-pressed composite oblique pile foundation and construction method |
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| CN201110122584A CN102251533B (en) | 2011-05-12 | 2011-05-12 | Spiral ribbed steel pipe concrete pre-pressed composite oblique pile foundation and construction method |
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| CN102251533A true CN102251533A (en) | 2011-11-23 |
| CN102251533B CN102251533B (en) | 2012-10-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225299A (en) * | 2013-03-29 | 2013-07-31 | 南通中技桩业有限公司 | Built-in anticorrosion structure for prestressing hollow square pile |
| CN105970921A (en) * | 2016-07-08 | 2016-09-28 | 上海长凯岩土工程有限公司 | Integrated construction method for oblique steel pipe and cemented soil stress body |
| CN109811771A (en) * | 2019-01-16 | 2019-05-28 | 北京建材地质工程有限公司 | Make the simple and easy method not bent when anchor bar steel waist rail tensioning |
| CN114357581A (en) * | 2022-01-04 | 2022-04-15 | 合肥市市政设计研究总院有限公司 | Displacement limit control-based pile group design analysis method for resisting large horizontal thrust |
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| JP2003041580A (en) * | 2001-07-30 | 2003-02-13 | Toyota Motor Corp | Soil improving pile body and foundation structure for house using the same |
| CN2622392Y (en) * | 2003-05-19 | 2004-06-30 | 上海禧龙工程安装有限公司 | Hollow high strength anchor-bolt grouting anchorage piece |
| JP2006348526A (en) * | 2005-06-14 | 2006-12-28 | Railway Technical Res Inst | Composite pile foundation structure and pile foundation type support method of structure |
| CN201826869U (en) * | 2010-10-16 | 2011-05-11 | 山东科技大学 | Soft rock roadway anchored steel pipe concrete anti-floor heave device |
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2011
- 2011-05-12 CN CN201110122584A patent/CN102251533B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003041580A (en) * | 2001-07-30 | 2003-02-13 | Toyota Motor Corp | Soil improving pile body and foundation structure for house using the same |
| CN2622392Y (en) * | 2003-05-19 | 2004-06-30 | 上海禧龙工程安装有限公司 | Hollow high strength anchor-bolt grouting anchorage piece |
| JP2006348526A (en) * | 2005-06-14 | 2006-12-28 | Railway Technical Res Inst | Composite pile foundation structure and pile foundation type support method of structure |
| CN201826869U (en) * | 2010-10-16 | 2011-05-11 | 山东科技大学 | Soft rock roadway anchored steel pipe concrete anti-floor heave device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225299A (en) * | 2013-03-29 | 2013-07-31 | 南通中技桩业有限公司 | Built-in anticorrosion structure for prestressing hollow square pile |
| CN105970921A (en) * | 2016-07-08 | 2016-09-28 | 上海长凯岩土工程有限公司 | Integrated construction method for oblique steel pipe and cemented soil stress body |
| CN105970921B (en) * | 2016-07-08 | 2018-05-11 | 上海长凯岩土工程有限公司 | A kind of integral construction method of oblique steel pipe soil cement beaer |
| CN109811771A (en) * | 2019-01-16 | 2019-05-28 | 北京建材地质工程有限公司 | Make the simple and easy method not bent when anchor bar steel waist rail tensioning |
| CN109811771B (en) * | 2019-01-16 | 2020-09-01 | 北京建材地质工程有限公司 | Simple method for preventing anchor rod steel waist beam from bending during tensioning |
| CN114357581A (en) * | 2022-01-04 | 2022-04-15 | 合肥市市政设计研究总院有限公司 | Displacement limit control-based pile group design analysis method for resisting large horizontal thrust |
| CN114357581B (en) * | 2022-01-04 | 2024-03-19 | 合肥市市政设计研究总院有限公司 | Pile group design analysis method for resisting large horizontal thrust based on displacement limit control |
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| CN102251533B (en) | 2012-10-03 |
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Application publication date: 20111123 Assignee: BUILDING DESIGN Research Institute HARBIN INSTITUTE OF TECHNOLOGY Assignor: Harbin Institute of Technology Contract record no.: 2015230000041 Denomination of invention: Spiral ribbed steel pipe concrete pre-pressed composite oblique pile foundation and construction method Granted publication date: 20121003 License type: Exclusive License Record date: 20150505 |
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Granted publication date: 20121003 |