CN101302758B - Method for processing prestress square pile - Google Patents
Method for processing prestress square pile Download PDFInfo
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- CN101302758B CN101302758B CN2008100121208A CN200810012120A CN101302758B CN 101302758 B CN101302758 B CN 101302758B CN 2008100121208 A CN2008100121208 A CN 2008100121208A CN 200810012120 A CN200810012120 A CN 200810012120A CN 101302758 B CN101302758 B CN 101302758B
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Abstract
The invention relates to the construction field. The processing method of a pre-stress square pile includes the steps that: firstly, bar sheathing, wherein, a main octagonal reinforced bar is sheathed in an inner octagonal spiral hoop bar according to a hole position and then a main tetragonal reinforced bar is sheathed in a tetragonal position in a tetragonal hoop bar and the two ends are lockedtightly by anchorages; secondly, tensioning, wherein, the main reinforced bar is tensioned by sections in a tensioning platform to 105 percent of the tension and then anchoring is carried out; thirdly, casting, wherein, the concrete casting is conducted in compound die after the inspection of tension and when the strength of the concrete meets the requirements, the reinforced bar is released and the unwanted main reinforced bar is cut; fourthly, finishing operation is carried out. Compared with the similar processing method, the method of the invention does not need pre-cast reinforced cage, and the bar sheathing can be directly conducted in the tensioning platform; the hoop bar is a spiral bar, thus having convenient installation but no breaking end, saving time and labor and having no need for wielding. The processing method of the invention can be used for pre-making solid pile or hollow pile in various sizes, thus increasing the anti-cracking strength and the limit bending moment of the pile body and prolonging the service life to 50 to 100 years.
Description
One, technical field:
The present invention relates to the realm of building construction, particularly side's stake production method.
Two, background technology:
In the pile foundation basic engineering, the ordinary reinforced concrete stake can't be held and be liked 4-5N/mm
2Tensile stress, under general condition, stake goes out the crack unavoidably buried in the process by hammering, for elongated stake, also the crack can occur in Ji Duo, transporting and hoisting, setting process, stake is in when underground, the erosion of crack infiltration and hazardous substances, certainly will influence its durability, therefore in the ordinary reinforced concrete stake, still be difficult to solve the pile body crack problem, can not guarantee the application life of stake though dispose a large amount of reinforcing bars.Prestressed concrete pile can effectively improve the cracking resistance of stake, employing pre-sets reinforcing cage, and reinforcing cage needs 50-100 root stirrup banding master muscle at a certain distance, and then matched moulds is poured into a mould, maintenance forms, the complex manufacturing of above-mentioned prestressed concrete pile, the making of reinforcing cage is wasted time and energy, and has increased the cost of production of prestressed concrete pile.
Three, summary of the invention:
The objective of the invention is to overcome above-mentioned not enough problem, a kind of processing method of prestress square pile is provided, time saving and energy saving, cost is low, the stake function admirable of production, long service life.
The technical scheme that the present invention is adopted for achieving the above object is: the processing method of prestress square pile, the first step is worn muscle: at first put four jiaos, anistree spiral stirrup and precast pile tip on pretensioniog bed, in anistree spiral stirrup, wear octagon master muscle according to the position, hole then, four jiaos of master's muscle are worn at four jiaos of places in four jiaos of spiral stirrups then, and lock with ground tackle at two ends;
The second step stretch-draw: on stretching bed, main muscle is carried out stretch-draw stage by stage, at first stretch-draw is to stretching force (initial stress amount stretch value) 10%, anistree spiral stirrup is unpluged a constant pitch to be fixed, and then unplug four jiaos of spiral stirrup one constant pitch and fix, and then other main muscle of stretch-draw carry out anchoring to 105% of stretching force (initial stress amount stretch value);
The 3rd step cast: stretch-draw after the assay was approved, matched moulds carries out concrete pouring, opens after concrete strength reaches requirement and puts, and cuts off unnecessary main muscle;
The 4th step finishing: open put finish after, in the member internal cutting off, the sharp presstressed reinforcing steel of stake cuts off the back and with concrete the muscle hole is smeared with the pile crown presstressed reinforcing steel.
When described stake was hollow pile, the cast of the 3rd step: matched moulds comprised external mold and internal mold.
The described second step stretch-draw: at first overlap the opposite side master muscle on limit to 10% of stretching force (initial stress amount stretch value) with outer four jiaos of master's muscle in the anistree main muscle in the stretch-draw, it is fixing to carry out unpluging of anistree spiral stirrup, and then all the other two of stretch-draw overlap the opposite side master muscle on limit to 10% of stretching force (initial stress amount stretch value) with outer four jiaos of master's muscle, it is fixing to carry out pushing aside of four jiaos of spiral stirrups again, and then stretch-draw is to 105% of stretching force (initial stress amount stretch value), anchoring; Other main muscle pretensionings are to 10% of stretching force (initial stress amount stretch value), and stretch-draw is to 105% anchoring of stretching force (initial stress amount stretch value) again.
Described main muscle is a spiral ribbed reinforced bar.
Described stretching force is 70% of a rebar standards intensity.
105% o'clock employing pressure control and the elongation control two control stretch-draw of described main muscle from stretching force 10% stretch-draw to stretching force.
The present invention compares with similar processing method, need not precast reinforced in advance cage, directly on stretching bed, wear muscle, and the outer octagon stirrup and outer four of internal layer octagon master muscle connects the outer tetragonal stirrup of shape master muscle and is a circular spiral stirrup, convenient during installation, and stirrup does not have broken end, need not weld, greatly time saving and energy saving, stretch-draw stage by stage during stretch-draw, fixing ectonexine stirrup then, firm, safety.Solid pile or hollow pile that can prefabricated various different sizes, alleviate deadweight, save steel, can produce 30 meters whole piles with interior all size, integral body need not pile extension, simultaneously bigger raising pile body vertical bearing capacity and structure tension bearing capacity, pile body deflection deformation in Ji Duo, transporting and hoisting, setting process can not produce the crack, can resile after the off-load, farthest improve the crack resistance and the ultimate bending moment of pile body, reached 50-100 application life.
Four, description of drawings:
The square pilework schematic diagram that Fig. 1 produces for the inventive method.
The solid pile profile that Fig. 2 produces for the inventive method.
The hollow pile profile that Fig. 3 produces for the inventive method.
Five, the specific embodiment:
Below in conjunction with specific embodiment the present invention is described in further detail, but is not limited to specific embodiment.
Embodiment 1
Processing prestressed concrete solid pile as shown in Figure 1, 2 as follows:
The first step is worn muscle: at first put four jiaos, anistree spiral stirrup and precast pile tip on pretensioniog bed, in anistree spiral stirrup, wear octagon master muscle according to pattern hole position, termination then, promptly wear in 2,4,15,13,7,11,10, No. 6 holes main muscle form in octagon master muscle, four jiaos of master's muscle are worn at four jiaos of places in four jiaos of spiral stirrups then, promptly wear main muscle in 1,5,16, No. 12 hole and form outer quadrangle master muscle, lock with ground tackle at two ends;
The second step stretch-draw: control stress for prestressing is 70% of a rebar standards intensity.At first overlap the opposite side master muscle on limit in the stretch-draw in the anistree main muscle with outer four jiaos of master's muscle, promptly 2,4,15, No. 13 main muscle stretch-draw is to 10% of stretching force (initial stress amount stretch value), carry out unpluging of anistree spiral stirrup, a place is fixed in colligation in 1 meter, and then all the other two opposite side master muscle that overlap the limit with outer four jiaos of master's muscle of stretch-draw, promptly 7,11,10, No. 6 main muscle stretch-draw is to 10% of stretching force (initial stress amount stretch value), carry out unpluging of four jiaos of spiral stirrups again, 0.5-1 a place is fixed in the wiring colligation in the rice length, and then with anistree main muscle in above-mentioned from 10% stretch-draw of stretching force (initial stress amount stretch value) to 105% of stretching force (initial stress amount stretch value), adopt pressure control and the two control of elongation control stretch-draw, anchoring; Outer four jiaos of master's muscle i.e. 1,5,16,12 main muscle, and pretensioning is to 10% of stretching force (initial stress amount stretch value), and stretch-draw is to 105% anchoring of stretching force (initial stress amount stretch value) again;
The 3rd step cast: check after the stretch-draw after stake point, pile crown and positive bar line are meeting the requirements, at the two sides matched moulds, the bottom surface is the plane, carry out concrete pouring from above, pile crown, the stake point district of vibrating that attaches most importance to, to avoid the cavity, after concrete strength reaches requirement, open and put, cut off unnecessary main muscle;
The 4th step finishing: open put finish after, the pile crown presstressed reinforcing steel in the member internal cutting off, is deep to an interior 10-15mm, use after the sharp presstressed reinforcing steel cut-out of stake and will cut off the presstressed reinforcing steel hole with the label concrete and locate to smear, and perform date of manufacture and specification mark.
The prestressing concrete hollow pile of processing shown in Fig. 1,3 as follows:
The first step is worn muscle: at first put four jiaos of spiral stirrups 17, anistree spiral stirrup 18 and precast pile tip 19 on pretensioniog bed, in anistree spiral stirrup, wear octagon spiral ribbed reinforced bar master muscle according to pattern hole position, termination then, promptly wear in 2,3,4,15,14,13,7,11,10, No. 6 holes main muscle form in octagon master muscle, four jiaos of master's muscle are worn at four jiaos of places in four jiaos of spiral stirrups then, promptly wear main muscle in 1,5,16, No. 12 hole and form outer quadrangle master muscle, lock with ground tackle at two ends;
The second step stretch-draw: control stress for prestressing is 70% of a normal intensity.At first overlap the opposite side master muscle on limit in the stretch-draw in the anistree main muscle with outer four jiaos of master's muscle, promptly 2,3,4,15,14, No. 13 main muscle stretch-draw is to 10% of stretching force (initial stress amount stretch value), carry out unpluging of anistree spiral stirrup, a place is fixed in colligation in 1 meter, and then all the other two opposite side master muscle that overlap the limit with outer four jiaos of master's muscle of stretch-draw, promptly 7,11,10, No. 6 main muscle stretch-draw is to 10% of stretching force (initial stress amount stretch value), carry out unpluging of four jiaos of spiral stirrups again, 0.5-1 a place is fixed in the wiring colligation in the rice length, and then with anistree main muscle in above-mentioned from 10% stretch-draw of stretching force (initial stress amount stretch value) to 105% of stretching force (initial stress amount stretch value), anchoring; Outer four jiaos of master's muscle i.e. 1,5,16,12 main muscle, and pretensioning is to 10% of stretching force (initial stress amount stretch value), and stretch-draw is to 105% anchoring of stretching force (initial stress amount stretch value) again;
The 3rd step cast: check after the stretch-draw after stake point, pile crown and positive bar line are meeting the requirements, at the two sides matched moulds, the centre adds detachable internal mold, the bottom surface is the plane, carry out concrete pouring from above, pile crown, the stake point district of vibrating that attaches most importance to avoid the cavity, after concrete strength reaches requirement, open and put, cut off unnecessary main muscle; The 4th step is identical with embodiment 1.
Claims (6)
1. the processing method of prestress square pile is characterized in that:
The first step is worn muscle: at first put four jiaos of spiral stirrups (17) and anistree spiral stirrup (18) and precast pile tip (19) on pretensioniog bed, pattern hole position, termination is according to octagon, quadrangle is arranged, wear octagon master muscle according to anistree place in anistree spiral stirrup, position, hole then, four jiaos of master's muscle are worn at four jiaos of places in four jiaos of spiral stirrups again, lock with ground tackle at main muscle two ends, wherein pattern hole position in termination is to be arranged in the roughly hole of square four edges, 5 holes roughly evenly distribute on every limit, totally 16 holes, wherein the continuous successively formation in the hole on four angles of square is tetragonal, all the other 12 holes link to each other successively and constitute octagon, and wherein the position of four jiaos of spiral stirrups and anistree spiral stirrup is corresponding with the position, main muscle hole on the template of termination;
The second step stretch-draw: on stretching bed, main muscle is carried out stretch-draw stage by stage, at first stretch-draw unplugs a constant pitch with anistree spiral stirrup and fixes to 10% of stretching force, and then unplugs four jiaos of spiral stirrup one constant pitch and fix, and then stretch-draw master muscle carries out anchoring to 105% of stretching force;
The 3rd step cast: stretch-draw after the assay was approved, matched moulds carries out concrete pouring, opens after concrete strength reaches requirement and puts, and cuts off unnecessary main muscle;
The 4th step finishing: open put finish after, in the member internal cutting off, the sharp presstressed reinforcing steel of stake cuts off the back and with concrete the muscle hole is smeared with the pile crown presstressed reinforcing steel.
2. the processing method of prestress square pile according to claim 1, it is characterized in that: the second step stretch-draw: at first the wherein a pair of main muscle of interior two couples of opposite side masters of the anistree main muscle muscle of stretch-draw is to 10% of stretching force, it is fixing to carry out unpluging of anistree spiral stirrup, and then stretch-draw another to opposite side master muscle to 10% of stretching force, it is fixing to carry out unpluging of four jiaos of spiral stirrups again, and then stretch-draw is to 105% of stretching force, anchoring; Other main muscle pretensionings are to 10% of stretching force, and 105% of stretching force, anchoring are arrived in stretch-draw again.
3. the processing method of prestress square pile according to claim 1 is characterized in that: the second step stretch-draw: 105% o'clock employing pressure control and the elongation control two control stretch-draw of main muscle from stretching force 10% stretch-draw to stretching force.
4. according to the processing method of the arbitrary described prestress square pile of claim 1-3, it is characterized in that: when side's stake was hollow pile, the cast of the 3rd step: matched moulds comprised external mold and internal mold.
5. according to the processing method of the arbitrary described prestress square pile of claim 1-3, it is characterized in that: main muscle is a spiral ribbed reinforced bar.
6. according to the processing method of the arbitrary described prestress square pile of claim 1-3, it is characterized in that: stretching force is 70% of a rebar standards intensity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100121208A CN101302758B (en) | 2008-07-02 | 2008-07-02 | Method for processing prestress square pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100121208A CN101302758B (en) | 2008-07-02 | 2008-07-02 | Method for processing prestress square pile |
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| CN101302758A CN101302758A (en) | 2008-11-12 |
| CN101302758B true CN101302758B (en) | 2010-07-28 |
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| CN2008100121208A Expired - Fee Related CN101302758B (en) | 2008-07-02 | 2008-07-02 | Method for processing prestress square pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114583A (en) * | 2013-02-28 | 2013-05-22 | 大连大金马基础建设有限公司 | Prestressed solid square pile |
Families Citing this family (12)
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| CN101758556B (en) * | 2010-01-08 | 2011-06-15 | 福建省大地管桩有限公司 | Manufacturing method of concrete head-forging pipe pile with tapered pile tip |
| CN101942832B (en) * | 2010-06-07 | 2012-07-18 | 大连大金马基础建设有限公司 | Full prestressed concrete integral solid square pile with steel pile tip and manufacturing method thereof |
| CN102205552B (en) * | 2011-05-23 | 2012-08-29 | 大连大金马基础建设有限公司 | Pile tip pouring die for prestress pile production line |
| CN102383425A (en) * | 2011-11-02 | 2012-03-21 | 上海中技桩业股份有限公司 | Integrated concrete pile tip and manufacturing method thereof |
| CN102431087B (en) * | 2011-12-09 | 2014-07-16 | 大连大金马基础建设有限公司 | Prestressed concrete square pile pretension operating platform |
| CN102587355B (en) * | 2012-01-13 | 2015-07-15 | 广东顺德电力设计院有限公司 | Octagonal pile and foundation structure applying octagonal pile |
| CN102979086B (en) * | 2012-12-17 | 2013-09-04 | 青岛兴河建材有限公司 | Prestressed concrete square pile and manufacturing method thereof |
| CN102995628B (en) * | 2012-12-17 | 2013-09-18 | 青岛兴河建材有限公司 | Precast reinforced concrete square pile and manufacturing method thereof |
| CN103114581B (en) * | 2013-01-28 | 2015-06-03 | 杨发 | Manufacture method of prestressed reinforced concrete piles |
| CN103911985A (en) * | 2013-02-28 | 2014-07-09 | 大连大金马基础建设有限公司 | Pre-stressed solid square pile |
| CN104589495B (en) * | 2014-12-05 | 2016-11-02 | 南通中技桩业有限公司 | A kind of manufacture method of seismic crack concrete square pile |
| CN105649013A (en) * | 2016-02-23 | 2016-06-08 | 初明进 | Production process for concrete hollow square pile |
-
2008
- 2008-07-02 CN CN2008100121208A patent/CN101302758B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114583A (en) * | 2013-02-28 | 2013-05-22 | 大连大金马基础建设有限公司 | Prestressed solid square pile |
| CN103114583B (en) * | 2013-02-28 | 2014-08-13 | 大连大金马基础建设有限公司 | Prestressed solid square pile |
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| CN101302758A (en) | 2008-11-12 |
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Granted publication date: 20100728 Termination date: 20170702 |