CN104099923B - Cast-type external prestressing steel tube concrete pile and construction method thereof and supporting piling wall - Google Patents
Cast-type external prestressing steel tube concrete pile and construction method thereof and supporting piling wall Download PDFInfo
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Abstract
The invention discloses a kind of cast-type external prestressing steel tube concrete pile, including: steel pipe, at the cast-in-place concrete layer of described steel duct and many presstressed reinforcing steels being arranged on described steel pipe, described presstressed reinforcing steel is arranged along the axis direction of steel pipe, including top section, interlude and end section, described interlude is positioned at outside steel pipe, described top section and end section run through steel pipe tube wall and enter inside steel pipe, and the upper end open of described steel pipe has an enclosed construction on bottom.Present invention also offers the construction method of aforementioned concrete-pile and there is the supporting piling wall of aforementioned concrete-pile.By the way, the cast-type external prestressing steel tube concrete pile of the present invention uses external prestressing technique, it is possible to preferably retrains pile body, it is provided that stretching resistance, effectively limits the deformation in Excavation Process of the supporting piling wall；It addition, can field fabrication, save cost of transportation, ensure pattern foundation pit supporting structure safe and reliable on the premise of, reduce cost, reduction of erection time and easy construction.
Description
Technical field
The present invention relates to all construction project fields such as building, municipal administration, traffic, water conservancy, electric power, industry, particularly relate to a kind of cast-type external prestressing steel tube concrete pile and construction method thereof and supporting piling wall.
Background technology
Base pit engineering technical scheme mainly accounted in terms of security reliability, economic rationality, difficulty of construction, construction period etc..In China coast periphery soft clay area to SMW engineering method stake, bored concrete pile, diaphram wall Application comparison many.
Shaped steel Soil-cement Wall, commonly referred to SMW engineering method, is a kind of compound gear soil water-stop structure being inserted into shaped steel formation at the triaxial cement mixing pile being socketed continuously.Three axes agitating pile rig is i.e. utilized to cut earth in the layer of original place, rig leading portion low pressure injects cement grout simultaneously, it is sufficiently stirred for forming the cement earth pile column barricade that water-resisting property is higher with the chopping soil body, before cement grout not yet hardens, inserts a kind of Construction Technique of Underground Works of shaped steel.SMW engineering method stake grows up based on Deep Mixing Pile Construction, and this structure has given full play to the mechanical characteristic of soil cement mixture and shaped steel, has economy, the duration is short, water-resisting property is strong, to features such as surrounding environment influence are little.H profile steel, after basement construction completes, can be extracted from cement mixing method by shaped steel Soil-cement Wall enclosed structure, reach reclaim and again with purpose.Therefore this engineering method compared with conventional maintenance form not only the duration short, work progress is pollution-free, place neatly clean, noise is little, and can save social resources, it is to avoid safeguard that body is forever left in underground after basement construction, become underground obstacle.Building a conservation-minded society in promotion, it is achieved today of sustainable development, this engineering method of popularization and application more has realistic meaning.
But SMW engineering method stake has the disadvantage in that in SMW engineering method stake and is used mostly H profile steel, the cost of H profile steel is high, and during actual architectural engineering uses, freight and the lease expenses of shaped steel are the highest, especially the duration longer in the case of, the lease expenses of shaped steel can be greatly increased use cost.Additionally shaped steel is typically after basement construction terminates, and needs to pull out, may result in the bending of shaped steel, breaks equal loss, can be greatly increased again engineering cost when place limits and cannot extract.
The reinforcing bar of bored concrete pile and the consumption of concrete are more, also need additionally to arrange water-stop curtain, construct cumbersome, and the impact on environment is bigger.
Therefore, supporting construction used in existing architecture Foundation Pit Engineering can't fully meet engineering demand, needs to develop a kind of novel foundation pit supporting construction, safe and reliable, economical rationality, easy construction.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of cast-type external prestressing steel tube concrete pile and construction method thereof and supporting piling wall, simple and reasonable, this cast-type external prestressing steel tube concrete pile uses external prestressing technique, preferably pile body can be retrained, stretching resistance is provided, effectively limits the deformation in Excavation Process of the supporting piling wall；It addition, this cast-type external prestressing steel tube concrete pile can require field fabrication according to design, it is to avoid it is unfavorable that pile body spreading and transport bring, save cost of transportation, on the premise of ensureing that pattern foundation pit supporting structure is safe and reliable, it is possible to reduce engineering cost, reduction of erection time and easy construction.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of cast-type external prestressing steel tube concrete pile, including: steel pipe, at the cast-in-place concrete layer of described steel duct and many presstressed reinforcing steels being arranged on described steel pipe, described presstressed reinforcing steel is arranged along the axis direction of steel pipe, including top section, interlude and end section, described interlude is positioned at outside steel pipe, described top section and end section run through steel pipe tube wall and enter inside steel pipe, the upper end open of described steel pipe, bottom has an enclosed construction.
In a preferred embodiment of the present invention, the wall body of described steel pipe having multiple upper through hole and multiple lower through hole, described top section runs through entrance steel duct from upper through hole, and section of the described end runs through entrance steel duct from lower through hole.
In a preferred embodiment of the present invention, described upper through hole is provided with sealing ring with the joint of top section, and described lower through hole is provided with sealing ring with the joint of end section.
In a preferred embodiment of the present invention, the outer wrap of described interlude has a protecting pipe, and the two ends of described protecting pipe are matched with upper through hole, lower through hole respectively.
In a preferred embodiment of the present invention, the distance between described upper through hole and steel pipe upper surface is 2m ~ 4m, and the plurality of lower through hole is symmetrical arranged with multiple upper through holes.
In a preferred embodiment of the present invention, described enclosed construction is pyramid enclosed construction.
In a preferred embodiment of the present invention, the cross section of described steel pipe is overall in dumbbell shape, including top flange, lower flange and the web being arranged between described top flange, lower flange, multiple tops section and end section in described top flange, are distributed, multiple tops section and end section in described lower flange, are distributed.
Present invention also offers the construction method of above-mentioned cast-type external prestressing steel tube concrete pile, including step in detail below:
A, described presstressed reinforcing steel, protecting pipe, sealing ring and steel pipe are assembled, form a steel pipe entirety, stand-by；
B, employing cement-soil stirring pile construction machinery are constructed, and form cement mixing method；
C, by Pile feeder, steel pipe entirety is put in cement mixing method, extract Pile feeder out；
D, from steel pipe upper end open to its internal casting concrete, maintenance of vibrating；
E, after maintenance reaches design strength, carry out external prestressing applying.
In a preferred embodiment of the present invention, when steel pipe entirety is put in cement mixing method by step c, cement mixing method is equipped with high-pressure water pipe device.
Present invention also offers a kind of supporting piling wall with above-mentioned cast-type external prestressing steel tube concrete pile, described supporting piling wall includes several cement mixing methods and the cast-type external prestressing steel tube concrete pile being arranged in described cement mixing method.
The method have the advantages that
1, the cast-type external prestressing steel tube concrete pile of the present invention uses external prestressing technique, it is possible to preferably retrains pile body, it is provided that stretching resistance, effectively limits the deformation in Excavation Process of the supporting piling wall；
2, the cast-type external prestressing steel tube concrete pile of the present invention, can be according to design requirement, cast in situs in cement mixing method, pouring construction is convenient, it is to avoid the trouble of pile body spreading, reduces cost of transportation；
3, compared with cast-in-situ bored pile, the cast-type external prestressing steel tube concrete pile of the present invention, the reinforcing bar used and the consumption of concrete are few, cost-effective, and effect on environment is little；
4, compared with SMW engineering method stake, the cast-type external prestressing steel tube concrete pile of the present invention, relative to shaped steel, add intensity, reduce cost of transportation, and need not pull out, it is to avoid engineering complete after shaped steel pull out loss problem；
5, the supporting piling wall of the present invention, uses cast-type external prestressing steel tube concrete pile, has preferable bending rigidity, and supporting intensity is high；
In sum, cast-type external prestressing steel tube concrete pile of the present invention and construction method thereof and supporting piling wall, i.e. ensure the safe and reliable of foundation pit supporting construction, there is again good economic benefit, easy construction, ambient influnence is little, meets the demand that base pit engineering is built further.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in describing embodiment below, the required accompanying drawing used is briefly described, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings, wherein:
Fig. 1 is the cross section structure schematic diagram one of described cast-type external prestressing steel tube concrete pile；
Fig. 2 is that the A-A of Fig. 1 is to sectional view；
Fig. 3 is the cross section structure schematic diagram two of described cast-type external prestressing steel tube concrete pile；
Fig. 4 is the cross section structure schematic diagram three of described cast-type external prestressing steel tube concrete pile；
Fig. 5 is the structural representation of a preferred embodiment of supporting piling wall of the present invention；
Fig. 6 is the structural representation of another preferred embodiment of supporting piling wall of the present invention.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Referring to Fig. 1 to Fig. 6, the embodiment of the present invention includes:
Embodiment one:
nullRefering to Fig. 1、Fig. 2 and Fig. 5，A kind of cast-type external prestressing steel tube concrete pile，Including: steel pipe 1、At the internal cast-in-place concrete layer 2 of described steel pipe 1 and the many presstressed reinforcing steels 3 being arranged on described steel pipe 1，Described presstressed reinforcing steel is arranged along the axis direction of steel pipe 1，Including top section 31、Interlude 32 and end section 33，Described interlude 32 is positioned at outside steel pipe 1，Described top section 31 and end section 33 run through steel pipe tube wall and enter inside steel pipe，It is internal that section of the described end 33 puts in concrete layer 2，It is closely linked with concrete layer 2，Described top section 31 part combines with concrete layer 2，Part is also had to expose concrete layer 2，The part exposed is for after pile body reaches design strength，Described presstressed reinforcing steel is carried out external prestressing applying，The present invention uses external prestressing technique，Preferably pile body can be retrained，Stretching resistance is provided，Effectively limit the deformation in Excavation Process of the supporting piling wall.
The upper end open of described steel pipe 1, for casting concrete, bottom has an enclosed construction 4.
Having multiple upper through hole 11 and multiple lower through hole 12 on the wall body of described steel pipe 1, described top section 31 runs through entrance steel duct from upper through hole 11, and section of the described end 33 runs through entrance steel duct from lower through hole 12.
Described upper through hole 11 is provided with sealing ring (not shown) with the joint of top section 31 so that upper through hole 11 has preferable sealing property with the joint of top section 31, prevents the water of outside from entering steel duct, affects the intensity of concrete；Equally, described lower through hole 12 is provided with sealing ring with the joint of end section 33 so that lower through hole 12 has preferable sealing property with the joint of end section 33, prevents the water of outside from entering steel duct, affects the intensity of concrete.
nullIn the present embodiment，The cross section of described steel pipe 1 is overall in dumbbell shape，Including top flange 13、Lower flange 14 and be arranged on described top flange 13、Web 15 between lower flange 14，Described top flange 13 and lower flange 14 ovalize，Described web is rectangle，Described top flange 13 is internal has epicoele 133，Described lower flange 14 is internal has cavity of resorption 143，There is inside described web intermediate cavity 151，It is formed with upper spacer 131 between described top flange 13 and web 15，Lower clapboard 141 it is formed with between described lower flange and web 15，Multiple upper through hole 132 it is disposed with along its length on described upper spacer 131，Multiple lower through-hole 142 it is disposed with along its length on described lower clapboard 141，Described upper through hole 132 and lower through-hole 142 make epicoele 133、Concrete within intermediate cavity 151 and cavity of resorption 143 is integrated into a whole，Whole steel tube concrete pile is made to have preferably structural behaviour，Security is high.
Many presstressed reinforcing steels 3 it are provided with on the outside of described top flange 13, it is internal that described presstressed reinforcing steel 3 runs through entrance epicoele 133 from the outside of top flange 13, it is provided with multiple presstressed reinforcing steel on the outside of described lower flange 14, it is internal that described presstressed reinforcing steel runs through entrance cavity of resorption 143 from the outside of lower flange 14, multiple tops section and end section are distributed in the epicoele 133 of described top flange 13, multiple tops section and end section in the cavity of resorption 143 of described lower flange 14, are distributed.
With reference to Fig. 1, described many presstressed reinforcing steels are evenly distributed on steel pipe 1 in the way of dividing, and simple in construction is reasonable in design.
Preferably, the distance between described upper through hole 11 and steel pipe 1 upper surface is 4m, reasonable in design, it is ensured that the carrying out that external prestressing applies, the plurality of lower through hole 12 is symmetrical arranged with multiple upper through holes 11.
With reference to Fig. 5, present invention also offers a kind of supporting piling wall with above-mentioned cast-type external prestressing steel tube concrete pile, described supporting piling wall includes several cement mixing methods and the cast-type external prestressing steel tube concrete pile being arranged in described cement mixing method.
Described cement mixing method uses triaxial cement mixing pile construction machinery to construct, process three cement mixing methods being mutually twisted every time, it is respectively front stake, central pile and rear stake, form a Soil-cement pile element, form body of wall, by multiple form of construction work in described cement mixing method continuously or interval arranges cast-type external prestressing steel tube concrete pile.
Described supporting piling wall is formed by multiple Soil-cement pile element Heterogeneous Permutations, the rear stake of previous Soil-cement pile element is mutually twisted with the front stake of later Soil-cement pile element, form alternating expression structure, enhance bending rigidity and the Lateral resisting ability of entirety.During practice of construction, undersized cast-type external prestressing steel tube concrete pile can be set in single cement mixing method, the cement mixing method being mutually twisted at dislocation arranges large-sized cast-type external prestressing steel tube concrete pile.
Embodiment two:
The second embodiment of the present invention is essentially identical with first embodiment; differ primarily in that: the interlude outer wrap of described presstressed reinforcing steel has a protecting pipe; the two ends of described protecting pipe are matched with upper through hole, lower through hole respectively; and use sealing ring good seal; in the present embodiment, adding protecting pipe outside interlude, this protecting pipe can use plastic tube; presstressed reinforcing steel can be protected not corroded by external water, fully ensured that high intensity and the serviceability of presstressed reinforcing steel.
It addition, also have following difference, in the present embodiment, the distance between described upper through hole and steel pipe upper surface is 2m, reasonable in design, it is ensured that what external prestressing applied is smoothed out, and the plurality of lower through hole is symmetrical arranged with multiple upper through holes.
Embodiment three:
With reference to Fig. 3 and Fig. 6, the third embodiment of the present invention is essentially identical with first embodiment, differ primarily in that: described presstressed reinforcing steel has 2 ~ 6 (shown in Fig. 3 for 6), it is divided into two groups, two groups of presstressed reinforcing steels are symmetrical arranged, and often organize 1 ~ 3 presstressed reinforcing steel and are closely packed together, form a whole, simple in construction, reasonable in design.
It addition, also have following difference, in the present embodiment, the distance between described upper through hole and steel pipe upper surface is 3m, reasonable in design, it is ensured that what external prestressing applied is smoothed out, and the plurality of lower through hole is symmetrical arranged with multiple upper through holes.
Additionally, also has following difference, providing a kind of supporting piling wall with above-mentioned cast-type external prestressing steel tube concrete pile in the present embodiment, described supporting piling wall includes several cement mixing methods and the cast-type external prestressing steel tube concrete pile being arranged in described cement mixing method.
Described cement mixing method uses triaxial cement mixing pile construction machinery to construct, process three cement mixing methods being mutually twisted every time, it is respectively front stake, central pile and rear stake, form a Soil-cement pile element, form body of wall, by multiple form of construction work in described cement mixing method continuously or interval arranges cast-type external prestressing steel tube concrete pile.
Described supporting piling wall includes being arranged in order, by multiple, the cement soil wall matrix that the cement mixing method being mutually twisted forms, it is interval with multiple Soil-cement pile element being parallel to described cement soil wall matrix in described cement soil wall matrix side, spaced apart can be a cement mixing method or multiple cement mixing method, depending on length according to actual cement soil wall matrix, three stakes of described Soil-cement pile element are mutually twisted with three stakes on cement soil wall matrix respectively, form raised type structure, in described cement mixing method continuously or be arranged at intervals with cast-type external prestressing steel tube concrete pile, enhance bending rigidity and the Lateral resisting ability of entirety.During practice of construction, undersized cast-type external prestressing steel tube concrete pile can be set in single cement mixing method, the cement mixing method being mutually twisted at raised type structure arranges large-sized cast-type external prestressing steel tube concrete pile.
Embodiment four:
With reference to Fig. 4, the fourth embodiment of the present invention is essentially identical with first embodiment, differs primarily in that described top flange and lower flange are changed into platypelloid type by original ellipse.
It addition, also have following difference, in the present embodiment, the distance between described upper through hole and steel pipe upper surface is 3m, reasonable in design, it is ensured that what external prestressing applied is smoothed out, and the plurality of lower through hole is symmetrical arranged with multiple upper through holes.
Present invention also offers the construction method of above-mentioned cast-type external prestressing steel tube concrete pile, including step in detail below:
A, described presstressed reinforcing steel, protecting pipe, sealing ring and steel pipe are assembled, form a steel pipe entirety, stand-by；
B, employing cement-soil stirring pile construction machinery are constructed, and form cement mixing method；
C, by Pile feeder, steel pipe entirety is put in cement mixing method, extract Pile feeder out, pyramid enclosed construction bottom steel pipe, reduce resistance during feeding, if sending into resistance or excessive, in cement mixing method, it is equipped with high-pressure water pipe device, for dilution water earth, thus reduces resistance；
D, from steel pipe upper end open to its internal casting concrete, maintenance of vibrating；
E, after maintenance reaches design strength, carry out external prestressing applying.
The method have the advantages that
1, the cast-type external prestressing steel tube concrete pile of the present invention uses external prestressing technique, reasonable stress, it is possible to preferably retrain pile body, it is provided that stretching resistance, effectively limits the deformation in Excavation Process of the supporting piling wall；
2, the cast-type external prestressing steel tube concrete pile of the present invention, can be according to design requirement, cast in situs in cement mixing method, pouring construction is convenient, it is to avoid the trouble of pile body spreading, reduces cost of transportation；
3, compared with cast-in-situ bored pile, the cast-type external prestressing steel tube concrete pile of the present invention, the reinforcing bar used and the consumption of concrete are few, cost-effective, and effect on environment is little.
4, compared with SMW engineering method stake, the cast-type external prestressing steel tube concrete pile of the present invention, relative to shaped steel, add intensity, reduce cost of transportation, and need not pull out, it is to avoid engineering complete after shaped steel pull out loss problem.
5, the supporting piling wall of the present invention, uses cast-type external prestressing steel tube concrete pile, has preferable bending rigidity, and supporting intensity is high.
In sum, cast-type external prestressing steel tube concrete pile of the present invention and construction method thereof and supporting piling wall, i.e. ensure the safe and reliable of foundation pit supporting construction, there is again good economic benefit, easy construction, ambient influnence is little, meets the demand that base pit engineering is built further.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical field, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (6)
1. a cast-type external prestressing steel tube concrete pile, it is characterised in that including: steel pipe, existing in described steel duct
The concrete layer watered and the many presstressed reinforcing steels being arranged on described steel pipe, described presstressed reinforcing steel is along the axis direction of steel pipe
Arranging, including top section, interlude and end section, described interlude is positioned at outside steel pipe, and described top section and end section run through steel pipe tube wall
Enter inside steel pipe, the upper end open of described steel pipe, bottom has an enclosed construction, the wall body of described steel pipe has multiple
Upper through hole and multiple lower through hole, described top section runs through entrance steel duct from upper through hole, and section is from lower through hole at the described end
Running through entrance steel duct, described upper through hole is provided with sealing ring, described lower through hole and end section with the joint of top section
Joint is provided with sealing ring, and the outer wrap of described interlude has a protecting pipe, the two ends of described protecting pipe respectively with on pass through
Perforation, lower through hole matched, the construction method of described cast-type external prestressing steel tube concrete pile, including walking in detail below
Rapid:
A, described presstressed reinforcing steel, protecting pipe, sealing ring and steel pipe are assembled, form a steel pipe entirety, stand-by；
B, employing cement-soil stirring pile construction machinery are constructed, and form cement mixing method；
C, by Pile feeder, steel pipe entirety is put in cement mixing method, extract Pile feeder out；
D, from steel pipe upper end open to its internal casting concrete, maintenance of vibrating；
E, after maintenance reaches design strength, carry out external prestressing applying.
Cast-type external prestressing steel tube concrete pile the most according to claim 1, it is characterised in that described upper through hole
And the distance between steel pipe upper surface is 2m ~ 4m, the plurality of lower through hole is symmetrical arranged with multiple upper through holes.
Cast-type external prestressing steel tube concrete pile the most according to claim 1, it is characterised in that described enclosed construction
For pyramid enclosed construction.
Cast-type external prestressing steel tube concrete pile the most according to claim 1, it is characterised in that cutting of described steel pipe
Face is overall in dumbbell shape, including top flange, lower flange and the web being arranged between described top flange, lower flange, described upper limb
Multiple tops section and end section are distributed in edge, multiple tops section and end section in described lower flange, are distributed.
Cast-type external prestressing steel tube concrete pile the most according to claim 1, it is characterised in that by steel in step c
When pipe entirety is put in cement mixing method, cement mixing method is equipped with high-pressure water pipe device.
6. a supporting piling wall, it is characterised in that described supporting piling wall includes several cement mixing methods and is arranged on described
Cast-type external prestressing steel tube concrete pile in cement mixing method, described cast-type external prestressing steel tube concrete pile
For the cast-type external prestressing steel tube concrete pile described in any one of claim 1 ~ 5.
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| CN201410276731.9A CN104099923B (en) | 2014-06-20 | 2014-06-20 | Cast-type external prestressing steel tube concrete pile and construction method thereof and supporting piling wall |
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| CN104099923B true CN104099923B (en) | 2016-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113309128B (en) * | 2021-05-24 | 2022-09-16 | 北京建材地质工程有限公司 | Construction method of dumbbell-shaped cement soil curtain pile in peat soil stratum |
| CN113653069A (en) * | 2021-09-09 | 2021-11-16 | 浙江省三建建设集团有限公司 | Pre-tensioning method prestress supporting structure of deep foundation pit and construction method thereof |
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