CN102852142B - A kind of pretensioned prestressing fender post - Google Patents
A kind of pretensioned prestressing fender post Download PDFInfo
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- CN102852142B CN102852142B CN201210290146.5A CN201210290146A CN102852142B CN 102852142 B CN102852142 B CN 102852142B CN 201210290146 A CN201210290146 A CN 201210290146A CN 102852142 B CN102852142 B CN 102852142B
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Abstract
A kind of pretensioned prestressing fender post, comprise a termination and pile body, it is characterized in that pile body is the I-shaped cross-section that top flange width is greater than bottom flange, the upper and lower edge of a wing is embedded with pretensioned prestressing steel strand or steel wire.Main muscle all adopts pretensioned prestressing high strength steel strand or steel wire, substantially eliminates distributing bar, and amount of reinforcement reduces further, and cost reduces.
Description
Technical field
The present invention relates to a kind of fender post of deep foundation pit support, particularly relate to a kind of prefabricated I-shaped pretensioned prestressing fender post.
Background technology
The Pile of Deep Foundation Pit of soft foundation adopts bored pile at present substantially, its bending resistant section is unreasonable, steel, concrete consumption is large, the large contaminated environment of mud conditioning difficulty produced in boring procedure, pile quality and welding quality of reinforcing steel are difficult to control, in addition, the amount of deflection of stake is large, crack width is large, and the reinforcement manner that disclosed in patent ZL200720311879.7, a kind of I-shaped preformed pile adopts non-prestressed steel strand to be combined with plain bars, reinforcing cage colligation difficult forming, amount of reinforcement is also larger, pile joint construction is also had relatively to bother costly, distributing bar consumption is large, a kind of I-shaped fender post of pretensioned prestressing that adopts have not been reported.
Summary of the invention
Technical problem to be solved by this invention is the deficiency overcoming above-mentioned prior art, provides the pretensioned prestressing fender post that a kind of bending resistant section is reasonable, cost is low.
According to a kind of pretensioned prestressing fender post provided by the invention, comprise a termination and pile body, it is characterized in that pile body is the I-shaped cross-section that top flange width is greater than bottom flange, described top flange and bottom flange are embedded with pretensioned prestressing steel strand or steel wire.
According to a kind of pretensioned prestressing fender post provided by the invention, also there is following attached technical characteristic:
Described stake termination by pile top end, pile extension end and stake top wherein two kinds combine.
The rectangular in cross-section on described stake top, width and pile body bottom flange are with wide, end and the web intersection on described stake top establish slope, and the end vertical on described stake top is embedded in steel plate in width symmetry, and in described top flange and bottom flange, steel strand expose end face certain length.
Described pile extension end is end face is step, the cross section of described pile extension end is rectangle, and with pile body bottom flange with wide, described pile extension end and web intersection are provided with slope, the intersection of described top flange and described pile extension end is arranged with oblique angle, described oblique angle to described pile extension end end face between the symmetrical steel pipe being embedded with steel strand, the prestress wire of described bottom flange stretches out end face certain length.
The cross section of described pile top end is rectangle, and longitudinal section is taper, and pile top end and web intersection are provided with inclined-plane.
Be embedded with down the non-prestressed steel strand of parabola in described I-shaped pile body, the end of steel hinge line anchors into the end of described top flange, and at least one end of steel strand is associated with ground tackle.
The two sides of described pile extension end are embedded with pre-embedded steel slab.
Described top flange is longitudinally separated by a distance establishes prominent rib, and prominent rib is variable cross-section.
Described web both sides are provided with stiffening rib, and stiffening rib external surface is equal with described bottom flange.
Described web, top flange are provided with lifting through hole.
According to a kind of pretensioned prestressing fender post provided by the invention compared with prior art tool have the following advantages:
1, main muscle all adopts pretensioned prestressing high strength steel strand or steel wire, substantially eliminates distributing bar, and amount of reinforcement reduces further, and cost reduces.
2, adopt pretensioned prestressing, stake bending rigidity is large, and bending resistance improves greatly.
3, stake shelves soil width is large, and stake number reduces, and speed of application is fast.
4, adopt ground tackle mechanical splice, pile extension is convenient, and node is reliable, joint cost saving.
5, pre-buried anti-shear steel plate is pushed up in stake, greatly improves the shear connections performance between fender post and ring beam.
6, all longitudinal stress muscle all adopt pre-tensioning system stretch-draw, and reinforcing bar binding is convenient, and thoroughly solve the stable problem in fine steel rib reinforcing cage process of binding, make efficiency improves greatly.
Accompanying drawing explanation
Fig. 1 is the stereogram of the first embodiment of the present invention.
Fig. 2 is the stereogram of the second embodiment of the present invention.
Fig. 3 is the stereogram of the third embodiment of the present invention.
Fig. 4 is arrangement of reinforcement of the present invention.
Fig. 5 is the sectional drawing of Fig. 4 A-A of the present invention.
Detailed description of the invention
See Fig. 1, Fig. 4 and Fig. 5, in the embodiment of a kind of pretensioned prestressing fender post that the present invention provides, comprise a termination 1 and pile body 2, pile body 2 is the I-shaped cross-section that top flange 21 width is greater than bottom flange 22, and described top flange 21 and bottom flange 22 are embedded with pretensioned prestressing steel strand or steel wire 3.Fender post of the present invention adopts i shaped cross section, and anti-bending strength is good, can not only meet requirement of strength, and can save material, reduces costs.Adopt prestress wire or steel wire as the main muscle of fender post, main concrete steel material use quantity can be made to decline to a great extent, stake flexural deformation reduces.
See Fig. 1, Fig. 2 and Fig. 3, in above-described embodiment that the present invention provides, described stake termination 1 by pile top end 11, pile extension end 12 and stake top 13 wherein two kinds combine.Namely can be made up of pile top end 11 and pile extension end 12, pile extension end 12 and stake top 13 is formed or pile top end 11 and stake top 13 are formed.Difference structure as shown in Figure 1, Figure 2 and Figure 3.Thus the fender post meeting different depth uses.
See Fig. 1 and Fig. 3, in above-described embodiment that the present invention provides, the rectangular in cross-section on described stake top 13, width and pile body bottom flange 22 are with wide, slope 24 is established with web 23 intersection in described stake top 13, described stake top 13 is embedded in steel plate 131 perpendicular to width symmetry, and in described top flange and bottom flange, steel strand 3 expose a top 13 certain length.Said structure can make stake and ring beam have to connect globality reliably, the normal section shearing resistance needs that described steel plate 131 is held for satisfied stake.
See Fig. 1 and Fig. 2, Fig. 4, in above-described embodiment that the present invention provides, described pile extension end 12 is end faces is step, the cross section of described pile extension end 12 is rectangle, and with pile body 2 bottom flange 22 with wide, described pile extension end 12 is provided with slope 24 with web 23 intersection, described top flange 21 is arranged with oblique angle 121 with the intersection of described pile extension end 12, described oblique angle 121 to described pile extension end end face between the symmetrical steel pipe 32 being embedded with steel strand 3, the prestress wire 3 of described bottom flange 22 stretches out end face certain length.Said structure can meet the stake of Fig. 1 and the reverse pile extension needs of stake of Fig. 2, and pile extension end 12 is conveniently interconnected.
See Fig. 1, Fig. 2, Fig. 3, in above-described embodiment that the present invention provides, the cross section of described pile top end 11 is rectangle, and longitudinal section is taper, and pile top end 11 and web 23 intersection are provided with slope 24.Said structure is beneficial to guide effect during 11 pilings of pile top end, reduces pressure pile resistance simultaneously.
In above-mentioned stake termination 1 provided by the invention, described slope 24, for connecting a termination 1 and pile body, makes both connections more firm, is convenient in demoulding.
See Fig. 4, in above-described embodiment that the present invention provides, be embedded with down the non-prestressed steel strand 31 of parabola in described I-shaped pile body 2, the end of steel hinge line 31 anchors into the stake end of described top flange 21.Described steel strand 31 can improve the anti-bending strength of pile body and anti-shear intensity is cut in stake.
See Fig. 1, in above-described embodiment that the present invention provides, the two sides of described pile extension end 1 are embedded with pre-embedded steel slab 14.After described steel plate is used for pile extension, stake is coupled to one up and down, improves the side direction shear resistance at pile extension place.
See Fig. 4 and Fig. 5, in above-described embodiment that the present invention provides, described top flange 21 is longitudinally separated by a distance establishes prominent rib 25, and prominent rib 25 is in variable cross-section.Described prominent rib 25 improves the flexural strength of described top flange 21.
See Fig. 4 and Fig. 5, in above-described embodiment that the present invention provides, described web 23 both sides are provided with stiffening rib 26, and stiffening rib 26 external surface is equal with bottom flange 22.Described stiffening rib 26 plays the effect strengthening thin web plate 23.
See Fig. 1, in above-described embodiment that the present invention provides, described web 23, top flange 21 and bottom flange 22 are provided with lifting through hole 27.The convenient lifting of described through hole 27.
Claims (6)
1. a pretensioned prestressing fender post, comprise a termination and pile body, it is characterized in that pile body is the I-shaped cross-section that top flange width is greater than bottom flange, described top flange and bottom flange are embedded with pretensioned prestressing steel strand or steel wire, described stake termination is by pile top end, in pile extension end and stake top wherein two kinds combine, the rectangular in cross-section on described stake top, width and pile body bottom flange are with wide, the end on described stake top and the web intersection of pile body establish slope, the end vertical on described stake top is embedded in steel plate in width symmetry, in described top flange and bottom flange, steel strand expose end face certain length, described pile extension end is end face is step, the cross section of described pile extension end is rectangle, and with pile body bottom flange with wide, the web intersection of described pile extension end and pile body is provided with slope, the intersection of described top flange and described pile extension end is arranged with oblique angle, described oblique angle to described pile extension end end face between the symmetrical steel pipe being embedded with steel strand, the prestress wire of described bottom flange stretches out end face certain length, the cross section of described pile top end is rectangle, longitudinal section is taper, the web intersection of pile top end and pile body is provided with slope.
2. fender post as claimed in claim 1, it is characterized in that being embedded with down the non-prestressed steel strand of parabola in described I-shaped pile body, the end of steel hinge line anchors into the end of described top flange, and at least one end of steel strand is associated with ground tackle.
3. fender post as claimed in claim 1, is characterized in that the two sides of described pile extension end are embedded with pre-embedded steel slab.
4. fender post as claimed in claim 1, is characterized in that described top flange is longitudinally separated by a distance and establishes prominent rib, and prominent rib is variable cross-section.
5. fender post as claimed in claim 1, it is characterized in that described web both sides are provided with stiffening rib, stiffening rib external surface is equal with described bottom flange.
6. fender post as claimed in claim 1, is characterized in that described web, top flange is provided with lifting through hole.
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| CN201210290146.5A CN102852142B (en) | 2012-08-15 | 2012-08-15 | A kind of pretensioned prestressing fender post |
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| CN201210290146.5A CN102852142B (en) | 2012-08-15 | 2012-08-15 | A kind of pretensioned prestressing fender post |
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| CN102852142A CN102852142A (en) | 2013-01-02 |
| CN102852142B true CN102852142B (en) | 2016-03-09 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103215948B (en) * | 2013-04-17 | 2016-01-06 | 杨众 | V-arrangement prestressing force fender post and construction method |
| CN103850259B (en) * | 2014-03-27 | 2016-04-27 | 宁波冶金勘察设计研究股份有限公司 | The horizontal inner support at the capping beam absolute altitude place of foundation pit supporting system and construction method thereof |
| CN103924587B (en) * | 2014-04-22 | 2018-02-23 | 杨众 | Inverted T-shaped prestressing force binodal support pile |
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| KR20030069903A (en) * | 2003-05-26 | 2003-08-27 | 박영희 | Pre-stressed concrete pile with connecting section steel and groove and producing method thereof |
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| JP2011089372A (en) * | 2009-10-26 | 2011-05-06 | Marubeni Construction Material Lease Co Ltd | Socket type connecting member for continuous underground wall core pile, and method of removing the same |
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| CN102852142A (en) | 2013-01-02 |
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Address after: 1505 Jian Jian building, South business district, first South Street, Ningbo, Zhejiang, Yinzhou District 315000, China Applicant after: Yang Zhong Applicant after: Yang Feng Address before: 315000, AUX Road, No. 757 Li RI Road, Yinzhou District, Ningbo, Zhejiang, 502 Applicant before: Yang Zhong Applicant before: Yang Feng |
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