CN103590398A - Prestressed reinforced concrete H-shaped support pile based on pre-tensioning method - Google Patents
Prestressed reinforced concrete H-shaped support pile based on pre-tensioning method Download PDFInfo
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- CN103590398A CN103590398A CN201310631932.1A CN201310631932A CN103590398A CN 103590398 A CN103590398 A CN 103590398A CN 201310631932 A CN201310631932 A CN 201310631932A CN 103590398 A CN103590398 A CN 103590398A
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Abstract
A prestressed reinforced concrete H-shaped support pile based on a pre-tensioning method comprises a standard pile section provided with a reinforcement cage, wherein the reinforcement cage is composed of erection reinforcing steel bars, an H-shaped steel hoop and an S-shaped steel hoop, the upper flat surface and the lower flat surface of the cross section of the reinforcement cage are provided with a plurality of horizontally and symmetrically arranged high-strength prestressed steel bars, the standard pile section is manufactured by the adoption of a steel die, the steel die comprises bottom channel steel and a turnable protruding side template, fixing stand columns are arranged on two sides of the protruding side template, pivots of the protruding side template are connected to two sides of the bottom channel steel, the upper ends of the fixing stand columns are connected with limiting channel steel, the two ends of the reinforcement cage are respectively provided with an end template provided with a plurality of horizontally-arranged through holes, and the through holes are matched with the prestressed steel bars. The prestressed reinforced concrete H-shaped support pile has the advantages that excellent anti-bending cross-section characteristic is achieved, and compared with a drilling poring pile normally adopted in a support pile, 40-50% of steel bars and 30-40% of concrete can be saved, and significant economic and technological effects are achieved.
Description
Technical field
The present invention relates to a kind of pile foundation of civil construction project, especially relate to a kind of pretensioned prestressing steel bar concrete work shape soldier pile that can bear the Foundation Pit Support Engineering of horizontal lateral earth pressure for deep-foundation pit engineering.
Background technology
Existing fender post adopts bored pile or tube-sinking cast-in-situ pile conventionally, and all takes the job practices of building site present walling pile, even if all complete fender post construction, described castinplace pile must can excavate foundation trench after concrete reaches intensity; Its efficiency of construction is lower; Secondly, its cross section of described bored pile or tube-sinking cast-in-situ pile (feature without low soil compaction) is circular cross-section, so it is poor to bear the mechanical characteristic of horizontal lateral earth pressure, be unfavorable for saving building resource, drilling slurry discharge simultaneously can cause the pollution to surrounding enviroment; When application bored pile or tube-sinking cast-in-situ pile are fender post conventionally, Construction Anti-seepage curtain outside this fender post, is generally cement mixing pile or high-pressure rotary jet grouting pile overlap joint, because not being connected with fender post, so Leakage of Foundation Pit probability is higher.
Again, the I-shaped soldier pile > of the authorized utility model patent ZL 20121030503020424506.1 < < steel bar concrete of the applicant >, its sectional reinforcement is bar reinforcement, and steel using amount is many; And another the authorized utility model patent ZL centrifugal casting prestressed steel bar concrete of 201320025300.6 < < I-section soldier pile > > of the applicant, in this patent because centrifugal building must reserve technique and box out, cross section web must be thickeied, thereby concrete material consumption is increased; Thereby all not ideal enough aspect lifting economic benefit.
Summary of the invention
Technical problem to be solved by this invention is exactly the present situation existing for above-mentioned prior art and a kind of preferably lower pretensioned prestressing steel bar concrete work shape soldier pile of anti-bending mechanics characteristic concrete and reinforcing bar consumption of materials that has is provided.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of pretensioned prestressing steel bar concrete work shape soldier pile, comprise a standard pile cutoff, this standard pile cutoff comprises a cage of reinforcement, it is characterized in that: this cage of reinforcement is comprised of handling reinforcement, work shape stirrup and S shape stirrup; The plane layout up and down in this cage of reinforcement cross section have a plurality of horizontal arrangement and along the high-strength prestress reinforcing bar of vertical center line symmetric arrays.
Described handling reinforcement, described work shape stirrup and described S shape stirrup bundle letter or point are welded into described cage of reinforcement.
Described prestressed reinforcement is provided with 5,7 or 9; Described prestressed reinforcement the best is 9.
The two ends of described cage of reinforcement are with connector.
Described standard pile cutoff adopts the punching block of I-section steel bar concrete soldier pile to make, and this punching block comprises that kerve steel and both sides are provided with vertical columns and turnover convex side template, and this convex side template is pivotally connected in described kerve steel both sides; Upper end between the vertical columns of described both sides is connected with spacing channel-section steel; Described cage of reinforcement two ends are provided with the Side Template of a plurality of horizontal through holes, described through hole and described prestressed reinforcement phase configuration.
Construction sequence of the present invention is as follows:
The 1st step: will turn under the convex side template of the both sides of punching block;
The 2nd step: put into cement topping cushion block on punching block base plate face, hang in the cage of reinforcement of making and be placed on cement topping cushion block;
The 3rd step: the both sides convex side template of punching block is dug in plumbness, adjust the cement topping cushion block of cage of reinforcement both sides, spacing channel-section steel in the middle of the Side Template of erector's tee section stake and fixedly convex side template 23, guarantees that the size of its I-shaped cross-section under vibration force effect is correct;
The 4th step: laid cage of reinforcement in punching block, and prestressed reinforcement is passed to the through hole on Side Template by root; By the requirement of design tension stress, prestressed reinforcement is carried out to pre-stress construction, then to passing through the anti-concrete seepage treatment of boxing out on Side Template, adopt to cuing open tubular bolt folder except prestressed reinforcement, and the through hole Inner of screw terminal template spillage while preventing that concrete from vibrating;
The 5th step:, in punching block, water concrete, vibratory compaction, floating, mobile insulation film made is topped;
The 6th step: pass into steam, temperature and time maintenance in accordance with regulations in insulation film made lid;
The 7th step: remove topped insulation film made, cut off prestressed reinforcement, screw out cuing open tubular bolt, dismounting fixedly the spacing channel-section steel in the middle of steel side form with under turn over both sides male steel side form, dismantle Side Template, complete and hang out steel bar concrete work shape of the present invention stake.
The present invention compared with prior art, its advantage is: one, I-shaped cross-section is to bear in the horizontal force resistant stake of lateral earth pressure to have best bending resistant section characteristic, be that soldier pile is compared with common employing bored pile, can save 40～50% reinforcing bars and 30～40% concretes, there is significant economy and technique effect; Its two, realize the stake of batch production production definition commodity, for base pit engineering, can improve 1～2 times of pile sinking efficiency, reduce labor cost; Its three, the engineering time can shorten 1～1.5 times, as long as complete fender post construction, gets final product earth excavation, is again the construction technology without mud; Its four, can regulate the pilespacing of soldier pile, thereby reach the internal force requirement of different depth foundation ditch; Its five, so prefabricated reinforced concrete I-section fender post is constructed between two, high-pressure rotary jet grouting pile, the constraint that is subject to I-section because of high-pressure rotary-spray cement paste can improve antiseep probability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional drawing of Fig. 1;
Fig. 3 is cage of reinforcement schematic diagram of the present invention;
Fig. 4 is the B-B sectional drawing of Fig. 3;
Fig. 5 A is the inlet part schematic diagram of steel bar concrete soldier pile;
Fig. 5 B is the top view of Fig. 5 A;
Fig. 6 is structure of steel die schematic diagram of the present invention;
Fig. 7 is the tip plate configurations schematic diagram of punching block of the present invention;
Fig. 7 A is the D-D sectional drawing of Fig. 7;
Fig. 8 is spreading schematic diagram of the present invention;
Fig. 9 is the C-C section welding schematic diagram of Fig. 8;
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Fig. 1 to Fig. 9 illustrates an embodiment of the invention, it comprises that one has the standard pile cutoff 10 of I-shaped cross-section, this standard pile cutoff comprises a cage of reinforcement, the upper and lower plane layout in cross section of this cage of reinforcement have a plurality of diameters be the horizontal arrangement of 9mm and along the high strength steel strand of vertical center line symmetric arrays as prestressed reinforcement 2, the quantity of this prestressed reinforcement is determined according to internal force size, conventionally have 5,7 or 9, the present embodiment prestressed reinforcement is 9;
The position that standard pile cutoff 10 is provided with suspension ring 3, two suspension ring 3 everywhere apart from the two end 0.207L length of pile cutoff 10 (L be as the criterion) is also that this puts fulcrum while stacking, and these 2 positions are that standard pile cutoff 10 positive hogging moment under recast is to equate.
This cage of reinforcement is comprised of with S shape stirrup 7 handling reinforcement 4, work shape stirrup 6; The inner side, left and right of this work shape stirrup 6 is wedge shape, and this wedge shape gradient is 1:3, as shown in Figure 1, 2; This inner side, left and right wedge structure is to be convenient to concrete build rear conveniently stripped; The two ends of this cage of reinforcement are with end face ironware 8, as shown in Figure 5; For boosting productivity, can be in advance on request to make cage of reinforcement stand-by; Fig. 3,4 is cage of reinforcement schematic diagram;
The making of standard pile cutoff 10 is the punching blocks 30 that adopt I-section steel bar concrete soldier pile, as shown in Figure 6; This I-section punching block is as vertical bottom face by the kerve steel 21 with upper steel plate 24, these vertical bottom face both sides are respectively provided with vertical columns 26 and turnover convex side template 23, this convex side template 23 is pivotally connected in kerve steel 21 both sides, this convex side template is for molding when plumbness, this convex side template is for the demoulding, as shown in Figure 6 when turning under two sides; The vertical columns 26 of both sides is connected with spacing channel-section steel 22 above, and this spacing channel-section steel and vertical columns 26 are correct for guaranteeing I-section of the present invention size; At cage of reinforcement two ends, be provided with the Side Template 31 of a plurality of horizontal through holes, as shown in Figure 7.
Construction sequence of the present invention is as follows:
The 1st step: the convex side template of the both sides of punching block 30 is turned over for 23 times;
The 2nd step: put into cement topping cushion block on punching block 30 base plate faces, hang in the cage of reinforcement of making and be placed on cement topping cushion block;
The 3rd step: the both sides convex side template 23 of punching block 30 is dug in plumbness, adjust the cement topping cushion block of cage of reinforcement both sides, spacing channel-section steel 22 in the middle of the steel Side Template 31 of erector's tee section stake and fixedly convex side template 23, guarantees that the size of I-section under vibration force effect is correct;
The 4th step: laid cage of reinforcement in punching block 30, and prestressed reinforcement 2 is passed to the through hole on steel Side Template 31 by root; By the requirement of design tension stress, prestressed reinforcement 2 is carried out to pre-stress construction, then to passing through the anti-concrete seepage treatment of boxing out on Side Template 31, use cuing open tubular bolt 33 folders except prestressed reinforcement 2, and the through hole of screw terminal template 31 (diameter 30mm) Inner, spillage while preventing that concrete from vibrating;
The 5th step:, at the interior pouring concrete of punching block 30, vibratory compaction, floating, mobile insulation film made is topped;
The 6th step: pass into steam, temperature and time maintenance in accordance with regulations in insulation film made lid;
The 7th step: remove topped insulation film made, cut off prestressed reinforcement 2, screw out cuing open tubular bolt 33, dismounting fixedly the spacing channel-section steel 22 in the middle of steel side form 23 with under turn over both sides male steel side form 23, dismantle Side Template 31, can hang out steel bar concrete work shape of the present invention stake 1.
In practical application, there is the demand that piles with different is long, can combine realization by sawing.
Fig. 8 illustrates the spreading of steel bar concrete soldier pile of the present invention, dowel 5 and steel tendon 2 overlap joints in stake end built-in fitting 8, and dowel 5 cross section tensile strength equal steel tendon 2 cross section tensile strength; The thickness of Fig. 9 light plate 8 is 16mm, has 5mm chamfering, and two joints are first at 5mm chamfering place groove full weld, and then topped and steel plate 9 welding, makes the intensity in the long any cross section of intensity timber pile at pile extension place.
Commodity stake can not have a lot of arrangement of reinforcement types, can only adjust soldier pile apart from meeting the requirements of foundation ditch internal force, inter-pile soil between soldier pile is by high-pressure rotary jet grouting pile antiseepage, because construct high-pressure rotary jet grouting pile under work shape constraints, cement-soil is in restriction range and the recessed complete filling of steel bar concrete work shape stake side, and be close to combination with soldier pile, have more more reliability with the antiseepage of conventional cement-soil curtain.
Claims (6)
1. a pretensioned prestressing steel bar concrete work shape soldier pile, comprise a standard pile cutoff (10), this standard pile cutoff comprises a cage of reinforcement, it is characterized in that: this cage of reinforcement is comprised of with S shape stirrup (7) handling reinforcement (4), work shape stirrup (6); The plane layout up and down in this cage of reinforcement cross section have a plurality of horizontal arrangement and along the high-strength prestress reinforcing bar (2) of vertical center line symmetric arrays.
2. pretensioned prestressing steel bar concrete work shape soldier pile according to claim 1, is characterized in that: described handling reinforcement (4), described work shape stirrup (6) are welded into described cage of reinforcement with described S shape stirrup (7) bundle letter or point.
3. pretensioned prestressing steel bar concrete work shape soldier pile according to claim 1, is characterized in that: described prestressed reinforcement (2) is provided with 5,7 or 9.
4. pretensioned prestressing steel bar concrete work shape soldier pile according to claim 3, is characterized in that: described prestressed reinforcement (2) the best is 9.
5. pretensioned prestressing steel bar concrete work shape soldier pile according to claim 2, is characterized in that: the two ends of this cage of reinforcement are with connector (8).
6. pretensioned prestressing steel bar concrete work shape soldier pile according to claim 1, it is characterized in that: described standard pile cutoff (10) adopts the punching block (30) of I-section steel bar concrete soldier pile to make, this punching block comprises that kerve steel (21) and both sides are provided with vertical columns (26) and turnover convex side template (23), and this convex side template is pivotally connected in described kerve steel both sides; Upper end between described both sides vertical columns (26) is connected with spacing channel-section steel (22); Described cage of reinforcement two ends are provided with the Side Template (31) of a plurality of horizontal through holes (33), described through hole (33) and described prestressed reinforcement (2) phase configuration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310631932.1A CN103590398A (en) | 2013-11-20 | 2013-11-20 | Prestressed reinforced concrete H-shaped support pile based on pre-tensioning method |
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| CN201310631932.1A CN103590398A (en) | 2013-11-20 | 2013-11-20 | Prestressed reinforced concrete H-shaped support pile based on pre-tensioning method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778966A (en) * | 2020-07-06 | 2020-10-16 | 常州市建筑科学研究院集团股份有限公司 | Prefabricated energy pile and manufacturing method thereof |
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| CN102828503A (en) * | 2012-08-21 | 2012-12-19 | 孔超 | H-shaped supporting pile made of prefabricated reinforced concrete |
| CN103061334A (en) * | 2013-01-08 | 2013-04-24 | 孔超 | I-section prestressed reinforced concrete support pile by centrifugal pouring |
| CN202989914U (en) * | 2012-08-15 | 2013-06-12 | 杨众 | Pre-tensioning method prestress guard pile |
| KR20130083551A (en) * | 2012-01-13 | 2013-07-23 | 송기용 | Pretensioned high strength concrete pile |
| CN103276726A (en) * | 2013-05-02 | 2013-09-04 | 江苏鼎达建筑新技术有限公司 | Pre-tensioning-method I-shaped supporting pile and manufacturing method thereof |
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- 2013-11-20 CN CN201310631932.1A patent/CN103590398A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130083551A (en) * | 2012-01-13 | 2013-07-23 | 송기용 | Pretensioned high strength concrete pile |
| CN202989914U (en) * | 2012-08-15 | 2013-06-12 | 杨众 | Pre-tensioning method prestress guard pile |
| CN102828503A (en) * | 2012-08-21 | 2012-12-19 | 孔超 | H-shaped supporting pile made of prefabricated reinforced concrete |
| CN103061334A (en) * | 2013-01-08 | 2013-04-24 | 孔超 | I-section prestressed reinforced concrete support pile by centrifugal pouring |
| CN103276726A (en) * | 2013-05-02 | 2013-09-04 | 江苏鼎达建筑新技术有限公司 | Pre-tensioning-method I-shaped supporting pile and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778966A (en) * | 2020-07-06 | 2020-10-16 | 常州市建筑科学研究院集团股份有限公司 | Prefabricated energy pile and manufacturing method thereof |
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Application publication date: 20140219 |