CN101117802A - Twist-off-proof concrete prefabricated screw pile construction method - Google Patents
Twist-off-proof concrete prefabricated screw pile construction method Download PDFInfo
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- CN101117802A CN101117802A CNA2007100126936A CN200710012693A CN101117802A CN 101117802 A CN101117802 A CN 101117802A CN A2007100126936 A CNA2007100126936 A CN A2007100126936A CN 200710012693 A CN200710012693 A CN 200710012693A CN 101117802 A CN101117802 A CN 101117802A
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- concrete prefabricated
- pile
- screw pile
- prefabricated screw
- torsion bar
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Abstract
A construction method for preventing concrete prefabricated helix pile from twisting off, a rigid twisting rod driven by a dynamic head is inserted to a hollow reinforced steel bar concrete prefabricated helix pile. The technical key points are described as follows: the rigid twisting rod is a regular polygon, a section in the hollow reinforced steel bar concrete is a matched regular polygon which is in line with the shape of the section of the rigid twisting rod; an upper steel end plate and a lower steel end plate are pre-arranged in the hollow reinforced steel bar prefabricated helix pile, the shape of the internal hole of the upper steel end plate and lower end plate is the matched regular polygon, which is in line with the shape of the section of the rigid twisting rod . When starting a dynamic head, a torque generated by the dynamic head is transmitted to the helix pile body or a plurality of steel end plates to the helix pile body through the rigid twisting rod to make the whole reinforced steel bar concrete prefabricated pile rotate into the soil foundation. The present invention removes the difficulties of twisting-off of the reinforced steel bar concrete prefabricated helix pile into the soil foundation, without noise and pollution, the construction efficiency is increased, and the construction cost is reduced, etc.
Description
(1) technical field:
The present invention relates to a kind of precast reinforced concrete piles of Foundation Design special use, particularly relate to a kind of anti-reinforced concrete prefabricated screw pile that twists off.
(2) background technology:
For a long time, give in the system pile driving construction at squash type, pile driving method by hammer, vibrosinking and pile jacking in method become current main means of giving the system pile driving construction, along with development of science and technology and environment-friendly type construction requirement, above-mentioned pile driving method by hammer and vibrosinking are because vibration is big, and social effects of pollution such as noise height progressively are restricted and eliminate.Characteristics such as prefabricated screw pile has bearing capacity height, convenient and quick construction, and is pollution-free, and noise is little, and cost is lower.Prefabricated screw pile employing～point in the past (normally in the pile crown part) applies moment of torsion, and screw pile applies the moment of torsion position and is easy to produce stress and concentrates, and pile body is easy to cracking, and pile body is easily twisted off during construction.
(3) summary of the invention:
The object of the present invention is to provide a kind of twist-off-proof concrete prefabricated screw pile construction method.Main thought multiple spot in pile tube of this method applies moment of torsion, or total length applies moment of torsion, causes that stress is concentrated and causes the concrete pile cracking to avoid applying moment of torsion at a point.
The technical scheme that adopts is:
A kind of twist-off-proof concrete prefabricated screw pile construction method, be that the rigidity torsion bar that unit head drives is inserted in the reinforced concrete prefabricated screw pile of hollow, its technical essential is that the rigidity torsion bar is a regular polygon, the cross section is consistent with rigidity torsion bar cross sectional shape in the reinforced concrete prefabricated screw pile of hollow, and the regular polygon that is complementary; Or bury upper and lower steel end plate in the reinforced concrete prefabricated screw pile of hollow in advance underground, the endoporus of upper and lower steel end plate is shaped as regular polygon, and consistent with rigidity torsion bar cross sectional shape, and is complementary.When the starting unit head, unit head revolves the moment of torsion that adds, and reaches the spiral pile body again after reaching the spiral pile body or reach upper and lower steel end plate by the rigidity torsion bar, makes whole reinforced concrete prefabricated screw pile rotation, screws in the soil matrix.
Characteristics of the present invention are:
Reverse drilling rod when 1, constructing and replace directly turning round stake;
2, the cross section is made regular polygon or a plurality of steel end plates that have the regular polygon endoporus is set in pile body in the reinforced concrete prefabricated screw pile of hollow, and the rigidity torsion bar is given pile body by the polygon power transmission.
The present invention compared with prior art has following advantage:
1, solves reinforced concrete prefabricated screw pile and screwed in the problem that construction is easily twisted off;
2, construction noiselessness, pollution-free;
3, improve efficiency of construction, reduced construction cost.
(4) description of drawings:
Fig. 1 is screw pile conventional construction method (a bit applying a moment of torsion) schematic diagram.
Fig. 2 is screw pile job practices of the present invention (multiple spot applies a moment of torsion) schematic diagram.
Fig. 3 is a torsion bar structural representation of the present invention.
Fig. 4 is the structural representation of end plate of the present invention.
(5) specific embodiment:
A kind of twist-off-proof concrete prefabricated screw pile construction method, the concrete prefabricated screw pile of selecting for use is made up of two joint unit pile bodies 2 and upright cutter 1, unit pile body 2 is hollow section pile bodies that outer wall has helical disk, be embedded with upper head plate 3, bottom plate 4 that steel plate is made respectively at the two ends of unit pile body 2, upper head plate 3, bottom plate 4 outer walls are circular, there is endoporus 6 in the centre, and endoporus is a square hole.During 2 butt joints of two unit pile bodies, the end face of contacted upper and lower end plate 3,4 welds together, and makes two unit pile bodies, 2 structures in aggregates.Upright cutter 1 is located at bottom plate 4 belows, and is connected with bottom plate 4 solid weldings.
During construction, it with the cross section earlier square, and insert in the endoporus 6 of unit pile body 2 upper head plates 3 and bottom plate 4 with the rigidity torsion bar 5 that endoporus 6 is complementary, fixedly connected with the power delivery in the upper end of rigidity torsion bar 5, start unit head, apply moment of torsion it is screwed in ground, until projected depth by reversing 5 pairs of unit pile bodies 2 of polygon rigidity torsion bar.
When the stressed screw-in ground of unit pile body 2 multiple spots, cause in the time of avoiding any to apply moment of torsion that overstresses are concentrated in the unit pile body 2, pile body was difficult for ftractureing a difficult problem that has easily been twisted off when having avoided the prefabricated spiral pile driving construction effectively when unit pile body 2 screwed in construction.
Claims (2)
1. twist-off-proof concrete prefabricated screw pile construction method, it is characterized in that the rigidity torsion bar (5) that unit head is driven inserts in the reinforced concrete prefabricated screw pile of hollow, rigidity torsion bar (5) is a regular polygon, the cross section is consistent with rigidity torsion bar (5) cross sectional shape in the reinforced concrete prefabricated screw pile of hollow, and the regular polygon that is complementary; Or bury upper head plate (3), bottom plate (4) in the reinforced concrete prefabricated screw pile of hollow in advance underground, the endoporus (6) of upper head plate (3) and bottom plate (4) is shaped as regular polygon, and consistent with rigidity torsion bar (5) cross sectional shape, and is complementary; When the starting unit head, unit head revolves the moment of torsion that adds, by rigidity torsion bar (5) reach the spiral pile body or reach upper head plate (3) and bottom plate (4) after reach the spiral pile body again, make whole reinforced concrete prefabricated screw pile rotation, in the screw-in soil matrix.
2. a kind of twist-off-proof concrete prefabricated screw pile construction method according to claim 1 is characterized in that described rigidity torsion bar (5) is square or regular hexagon; The cross section is square or regular hexagon in the reinforced concrete prefabricated screw pile of described hollow; The endoporus (6) of upper head plate (3) and bottom plate (4) is shaped as square or regular hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100126936A CN101117802A (en) | 2007-09-03 | 2007-09-03 | Twist-off-proof concrete prefabricated screw pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100126936A CN101117802A (en) | 2007-09-03 | 2007-09-03 | Twist-off-proof concrete prefabricated screw pile construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101117802A true CN101117802A (en) | 2008-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100126936A Pending CN101117802A (en) | 2007-09-03 | 2007-09-03 | Twist-off-proof concrete prefabricated screw pile construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN101117802A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116023A (en) * | 2010-12-16 | 2011-07-06 | 李跃进 | Precast concrete pressed and suspended pile and construction method |
| CN105756056A (en) * | 2016-04-07 | 2016-07-13 | 中国十七冶集团有限公司 | Novel concrete screw pile construction method |
-
2007
- 2007-09-03 CN CNA2007100126936A patent/CN101117802A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116023A (en) * | 2010-12-16 | 2011-07-06 | 李跃进 | Precast concrete pressed and suspended pile and construction method |
| CN105756056A (en) * | 2016-04-07 | 2016-07-13 | 中国十七冶集团有限公司 | Novel concrete screw pile construction method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |