CN102888841B - End part thread five-pointed-star-shaped variable-section prefabricated pipe pile and construction method thereof - Google Patents
End part thread five-pointed-star-shaped variable-section prefabricated pipe pile and construction method thereof Download PDFInfo
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- CN102888841B CN102888841B CN2012104115147A CN201210411514A CN102888841B CN 102888841 B CN102888841 B CN 102888841B CN 2012104115147 A CN2012104115147 A CN 2012104115147A CN 201210411514 A CN201210411514 A CN 201210411514A CN 102888841 B CN102888841 B CN 102888841B
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Abstract
The invention relates to an end part thread five-pointed-star-shaped variable-section prefabricated pipe pile and a construction method of the end part thread five-pointed-star-shaped variable-section prefabricated pipe pile. The pipe pile comprises two pipe sections; a first pipe section is provided with a pile point, a large-section section, a belt rib section and a top thread section; the large-section section is in a frustum shape and the surface is provided with a thread; the cross section of the belt rib section is in a five-pointed star shape and is the same in size; the surface of the belt rib section is provided with a belt rib; the cross section of the top thread section is circular; a second pipe section is in a reversed circular truncated cone shape and a circular truncated cone has a central through hole; the lower section of the central through hole is provided with an inner thread section; the surface of the circular truncated cone is provided with a ruler line and the cross section of the circular truncated cone is annular; and the integrated prefabricated pipe pile is formed by connecting the two pipe sections by screwing the top thread section into the inner thread section. The pipe pile has the advantages of simple structure and low manufacturing cost. The invention further provides the construction method of the pipe pile, and the construction method has the advantages of strong operability, high construction efficiency and good stability and safety of the pipe pile; and the construction method is suitable for the foundation construction of a large-size pile of a soft soil region and has obvious economic benefit.
Description
Technical field
The present invention relates to a kind of end thread five-pointed star deformation cross section prefabricated tubular pile and job practices thereof, described variable cross-section refers to the long axis direction variable cross-section of prefabricated tubular pile, belongs to the building pile foundation technical field.
Background technology
Along with the continuous expansion of China's city size, increasing high-rise building all faces a difficult problem of building on soft foundation.Pile foundation is mainly born the upper building load by frictional resistance and the end resistance of stake side because of it, itself has again larger globality and rigidity in addition, can bear very large vertical load, this makes it can meet well requirement for bearing capacity and the settlement request of high-rise building, and becomes the main foundation form of High-rise Buildings Resting on Soft thing.Along with constantly applying of pile foundation, researchers find stake week soil because self is fixed, immersion saturated yielding, place banket, the degradation reason can make the sedimentation of its generation be greater than pile body settlement under ground preloading, pile top load, groundwater table, at this moment the stake side will produce negative friction, this frictional resistance has formed the part of pressure bearing pile load, reduced stake supporting capacity, reduced the safety stock of pile strength, and may cause that the sedimentation that pile body is larger drives superstructure thing uneven subsidence thereupon, even can cause foundation failure when serious.Therefore, the novel pile foundation of research and develop a kind of economy, effectively cutting down negative friction, seem particularly urgent.
Summary of the invention
The technical problem to be solved in the present invention is: provides a kind of and can effectively reduce negative friction simultaneously and improve stake side positive friction, and more economical end thread five-pointed star deformation cross section prefabricated tubular pile and job practices thereof.
The present invention solves the problems of the technologies described above taked technical scheme to be: a kind of end thread five-pointed star deformation cross section prefabricated tubular pile is provided, comprise first segment tube coupling and second section tube coupling, described first segment tube coupling is provided with pile top, heavy in section section, band rib section and screw top section from top to bottom, the heavy in section section is taper type, there is screw thread on surface, cross section with rib section is five-pointed star shape and equal and opposite in direction, with the surface of rib section, has with ribbing; Screw top section cross section is circular; The second section tube coupling is the rounding taper type, and frustum has central through hole, and the hypomere of central through hole is provided with internal thread segment, and the frustum smooth surface is provided with scale line, and the frustum cross section is annular; The internal thread segment that screw top section by the first segment tube coupling screws in the second section tube coupling connects into complete prefabricated tubular pile by two tube couplings.
The present invention also provides the job practices of application described a kind of end thread five-pointed star deformation cross section prefabricated tubular pile, comprises the following steps:
(1) smooth location pile press is in place;
(2) lift by crane described end thread five-pointed star deformation cross section prefabricated tubular pile: first with crane, the first segment tube coupling is risen and winches in the piling case;
(3) be pressed into the first segment tube coupling: stake is pressed into underground with the piling hydraulic cylinder;
(4) pile extension: predetermined being pressed into when first segment tube coupling to top is exposed at the height of the nearly lm in ground carried out pile extension, lifting second section tube coupling, and adjust the center complete matching of upper and lower two tube couplings, rotate the second tube coupling with the pipe clamp instrument in place, make first segment tube coupling and second section tube coupling connect into complete prefabricated tubular pile;
(5) be pressed into the second section tube coupling: be pressed into underground with the piling hydraulic cylinder by the second section tube coupling;
(6) inspect for acceptance: check errorless after, mobile pile press, to new stake position, completes the prefabricated tubular pile construction of end thread five-pointed star deformation cross section.
End thread five-pointed star deformation cross section prefabricated tubular pile of the present invention and job practices thereof compared with prior art have following advantage:
1) the band rib section cross section due to the first segment tube coupling of pile tube of the present invention is five-pointed star shape, changed the structure form of conventional piles basis section, improved significantly specific area, obviously improved stake side positive friction, pile tube the second tube coupling of the present invention is the rounding taper type, can effectively reduce the impact of negative friction.
2) pile tube of the present invention is compared with the prefabricated five-pointed star shape of uniform section reinforced concrete pile, because tubular pile body integral body is tapered, is adopting under same immersed tube mode, and it is darker that pile tube of the present invention is processed the degree of depth.
3) pile tube of the present invention is compared with the taper expanded bore pile, the screw thread of heavy in section section surface setting has changed interactional pattern between stake and the soil body, stake has formed the mechanical type interlock with Soil Interface, further strengthen firm performance, unsinkability energy and the anti-pulling performance of pile foundation, effectively improved stake side positive friction, pile tube of the present invention can be replaced the taper expanded bore pile and expand end operation, constructs simpler.
4) the band rib section cross-sectional area due to pile tube the first tube coupling of the present invention is less than heavy in section section sectional area, but equal the width of heavy in section section cross section with the radial width of rib section, after pile body is pressed in soil fully, must be by stake native filling of week with the recessed part between rib section with ribbing, adjusted like this distribution of forces between soil and stake, pile tube of the present invention can enlarge markedly the bearing capacity of stake, and the recessed design with rib section, more contributes to the thread segment pile tube to be pressed in soil.
5) stake of the present invention type can be brought into play the advantage of tapered pile at the bottom of prefabricated expansion, the stake of five-pointed star shape, half-thread stake simultaneously and make up deficiency separately: improved the unit materials rate of utilization of strength.
The advantages such as 6) pile tube of the present invention has simple in structurely, and manufacturing cost is lower, and specific area is large, and stake side positive friction is high, and the bearing capacity of single pile is large.The present invention has improved the bearing capacity of pile tube to a greater degree with economic means.The pipe pile construction method technique that the present invention proposes is simple, workable, and efficiency of construction is high, and the stability of pile tube and safety are good, and can improve to a greater degree the unit materials rate of utilization of strength, and have eliminated the impact of negative friction on pile foundation.
7) pile tube of the present invention and job practices thereof can be widely used in the construction of soft clay area large pile foundation, and remarkable in economical benefits, have a extensive future.
The accompanying drawing explanation
The structural representation that Fig. 1 is end thread five-pointed star deformation of the present invention cross section prefabricated tubular pile.
The structural representation that Fig. 2 is first segment tube coupling of the present invention.
Fig. 3 is first segment tube coupling band rib section cross sectional representation.
The structural profile schematic diagram that Fig. 4 is second section tube coupling of the present invention.
Fig. 5 is for to be positioned over the view in pile press by first segment tube coupling of the present invention.
Fig. 6 is work progress schematic diagram of the present invention.
In above-mentioned figure: 1-pile top, 2-heavy in section section, 3-band rib section, 4-are with ribbing, 5-screw top section, 6-first segment tube coupling, 7-second section tube coupling, 8-scale line, 9-internal thread segment, 10 central through holes, 11-pile press, 12-crane, 13-piling case.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1: a kind of end thread five-pointed star deformation of the present invention cross section prefabricated tubular pile, its structure as shown in Figure 1, comprises first segment tube coupling 6 and second section tube coupling 7.First segment tube coupling 6 structures, as Fig. 2, are provided with pile top 1, heavy in section section 2, band rib section 3 and screw top section 5 from top to bottom, and heavy in section section 2 is taper type, there is screw thread on surface, cross section with rib section 3 is five-pointed star shape and equal and opposite in direction, as Fig. 3, with the surface of rib section, has with ribbing 4; Screw top section 5 cross sections are circular.
As Fig. 4, second section tube coupling 7 is the rounding taper type, frustum has central through hole 10, the hypomere of central through hole is provided with internal thread segment 9, the frustum smooth surface is provided with scale line 8, and scale line selects bright-colored to indicate, and as adopted red paint, marks a row scale in the side on frustum surface, precision is 100mm, so as in construction observation, record; The frustum cross section is annular; The screw top section 5 of first segment tube coupling 6 is screwed in to the internal thread segment 9 of second section tube coupling 7, two tube couplings are connected into to complete prefabricated tubular pile.
Embodiment 2: the job practices of a kind of end thread five-pointed star deformation cross section prefabricated tubular pile that the application embodiment of the present invention 1 provides comprises following construction sequence:
(1) smooth location static pressure pile press 11 is in place, as shown in Figure 5.
(2) lifting preformed pile: with crane 12,6 of first segment tube couplings are winched in piling case 13, make pile top 1 perpendicular alignmnet Zhuan Wei center, as shown in Figure 6 a.
(3) be pressed into first segment tube coupling 6: be pressed into underground with the piling hydraulic cylinder of piling case 13 by first segment tube coupling 6.As shown in Figure 6 b, utilize the wedge cleaving reinforcement principle of chuck case, clamp pile, with the piling hydraulic cylinder, stake is pressed into undergroundly, the piling stroke is 1m at every turn, with the piling hydraulic cylinder, first segment tube coupling 6 is depressed into to desired depth, as shown in Figure 6 b.
(4) pile extension: as shown in Fig. 6 c, general predetermined being pressed into when first segment tube coupling 6 to top is exposed at the height of the nearly lm in ground carried out pile extension, lifting second section tube coupling 7, and adjust the center complete matching of upper and lower two tube couplings, in place with pipe clamp instrument rotation second section tube coupling 7, make first segment tube coupling 6 and second section tube coupling 7 connect into complete prefabricated tubular pile;
(5) be pressed into second section tube coupling 7: as shown in Fig. 6 d, be pressed into underground with the piling hydraulic cylinder by second section tube coupling 7.Be provided with the scale line 8 for observing the pile sinking degree of depth in the pile body side of second section tube coupling 7, mark a row scale with red paint in the side of stake, so as in construction observation, record.Method of press-fitting is identical with step (3);
(6) inspect for acceptance: check errorless after, mobile pile press 11, to new stake position, completes the prefabricated tubular pile construction of end thread five-pointed star deformation cross section.
End thread five-pointed star deformation of the present invention cross section prefabricated tubular pile has simple in structure, the advantage that manufacturing cost is lower, and pipe pile construction method of the present invention, workable, efficiency of construction is high.Pile tube of the present invention and job practices thereof can be widely used in the construction of soft clay area large pile foundation, and remarkable in economical benefits, have a extensive future.
Claims (2)
1. an end thread five-pointed star deformation cross section prefabricated tubular pile, comprise first segment tube coupling and second section tube coupling, it is characterized in that: described first segment tube coupling is provided with pile top, heavy in section section, band rib section and screw top section from top to bottom, the heavy in section section is taper type, there is screw thread on surface, cross section with rib section is five-pointed star shape and equal and opposite in direction, with the surface of rib section, has with ribbing; Screw top section cross section is circular; The second section tube coupling is the rounding taper type, and frustum has central through hole, and the hypomere of central through hole is provided with internal thread segment, and the frustum smooth surface is provided with scale line, and the frustum cross section is annular; The internal thread segment that screw top section by the first segment tube coupling screws in the second section tube coupling connects into complete prefabricated tubular pile by two tube couplings.
2. application rights requires the job practices of 1 described a kind of end thread five-pointed star deformation cross section prefabricated tubular pile, it is characterized in that, comprises the following steps:
(1) smooth location pile press is in place;
(2) lift by crane described end thread five-pointed star deformation cross section prefabricated tubular pile: first with crane, the first segment tube coupling is risen and winches in the piling case;
(3) be pressed into the first segment tube coupling: stake is pressed into underground with the piling hydraulic cylinder;
(4) pile extension: predetermined being pressed into when first segment tube coupling to top is exposed at the height of the nearly lm in ground carried out pile extension, lifting second section tube coupling, and adjust the center complete matching of upper and lower two tube couplings, rotate the second tube coupling with the pipe clamp instrument in place, make first segment tube coupling and second section tube coupling connect into complete prefabricated tubular pile;
(5) be pressed into the second section tube coupling: be pressed into underground with the piling hydraulic cylinder by the second section tube coupling;
(6) inspect for acceptance: check errorless after, mobile pile press, to new stake position, completes the prefabricated tubular pile construction of end thread five-pointed star deformation cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104115147A CN102888841B (en) | 2012-10-25 | 2012-10-25 | End part thread five-pointed-star-shaped variable-section prefabricated pipe pile and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104115147A CN102888841B (en) | 2012-10-25 | 2012-10-25 | End part thread five-pointed-star-shaped variable-section prefabricated pipe pile and construction method thereof |
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| Publication Number | Publication Date |
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| CN102888841A CN102888841A (en) | 2013-01-23 |
| CN102888841B true CN102888841B (en) | 2013-12-11 |
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| CN2012104115147A Active CN102888841B (en) | 2012-10-25 | 2012-10-25 | End part thread five-pointed-star-shaped variable-section prefabricated pipe pile and construction method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104674835B (en) * | 2015-03-06 | 2016-07-06 | 江苏山海新型建材股份有限公司 | The automatic rapid spiral thread form docking structure of foundation pile |
| CN110468830A (en) * | 2019-09-10 | 2019-11-19 | 河海大学 | A kind of rapid anchor ingot stake and construction method |
| CN111350181B (en) * | 2020-03-26 | 2021-06-22 | 上海杰地建筑设计有限公司 | Precast concrete tubular pile only bearing anti-pulling effect |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585681A (en) * | 1983-06-03 | 1986-04-29 | Nippon Kokan Kk | Frost damage proofed pile |
| CN2177747Y (en) * | 1993-03-30 | 1994-09-21 | 管自立 | Prefabricated special X type square pile |
| JP2003027471A (en) * | 2001-07-18 | 2003-01-29 | Zengoro Ando | Foundation pile |
| CN102212993A (en) * | 2010-04-06 | 2011-10-12 | 盐城市双强管桩有限公司 | Pre-stressed reinforced concrete circular hollow pile with internal thread or internal groove and processing method thereof |
| CN102400459A (en) * | 2011-11-09 | 2012-04-04 | 河南理工大学 | Cast-in-place concrete hollow five-star shaped pile with large diameter and construction method and special device thereof |
| CN202298609U (en) * | 2011-10-14 | 2012-07-04 | 大连增益重工机械设备有限公司 | Stepped foundation auger pile |
-
2012
- 2012-10-25 CN CN2012104115147A patent/CN102888841B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585681A (en) * | 1983-06-03 | 1986-04-29 | Nippon Kokan Kk | Frost damage proofed pile |
| CN2177747Y (en) * | 1993-03-30 | 1994-09-21 | 管自立 | Prefabricated special X type square pile |
| JP2003027471A (en) * | 2001-07-18 | 2003-01-29 | Zengoro Ando | Foundation pile |
| CN102212993A (en) * | 2010-04-06 | 2011-10-12 | 盐城市双强管桩有限公司 | Pre-stressed reinforced concrete circular hollow pile with internal thread or internal groove and processing method thereof |
| CN202298609U (en) * | 2011-10-14 | 2012-07-04 | 大连增益重工机械设备有限公司 | Stepped foundation auger pile |
| CN102400459A (en) * | 2011-11-09 | 2012-04-04 | 河南理工大学 | Cast-in-place concrete hollow five-star shaped pile with large diameter and construction method and special device thereof |
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