CN203498828U - Top reinforced cast-in-place concrete thin-wall pipe pile - Google Patents
Top reinforced cast-in-place concrete thin-wall pipe pile Download PDFInfo
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- CN203498828U CN203498828U CN201320597552.6U CN201320597552U CN203498828U CN 203498828 U CN203498828 U CN 203498828U CN 201320597552 U CN201320597552 U CN 201320597552U CN 203498828 U CN203498828 U CN 203498828U
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Abstract
The utility model relates to a top reinforced cast-in-place concrete thin-wall pipe pile, which is characterized in that a thin-wall pipe pile main pile body is cast to a pile in place by adopting a double-layer steel immersed tube, the upper diameter of the thin-wall pipe pile main pile body is enlarged, a plastic sleeving and a vertical drainage body are orderly arranged outside the concrete pile body of a pile diameter enlarged segment from inside to outside, the pile diameter enlarged segment is connected with an upper prefabricated pile toe, the bottom portion of the thin-wall pipe pile main pile body is connected with a lower prefabricated pile toe, pile peripheral soil on the upper portion of a thin-wall pipe pile is solidified and processed to be a solidified soil layer, connecting bars are arranged between the top portion of the thin-wall pipe pile, a pile core closed segment and a pile top cover plate, and a drainage channel which is communicated with the vertical drainage body is arranged in the pile top cover plate. The top reinforced cast-in-place concrete thin-wall pipe pile improves driven quality of the thin-wall pipe pile main pile body, can improve mechanical property of an upper pile body and the pile peripheral soil, can prevent the thin-wall pipe pile main pile body from deforming because mud cake is brought outside ground surface, and has excellent technique economic performance.
Description
Technical field
The utility model relates to a kind of cast-in-situ concrete thin-wall, and particularly a kind of pile body top expands also outsourcing vertical drainage body, the curing reinforced cast in place concrete thin tunnel pile in top of the stake top soil body.Belong to ground process field, be applicable to foundation treatment engineering, be particularly useful for the Soft Ground engineering that weak soil buried depth is shallow, pile spacing is less.
Background technology
China is vast in territory, and complex geologic conditions and various places difference are larger, and soft foundation classification is many, distribution is wide, particularly in sedimentary facies area, river, Ji Neidi lake, coastal area, exists the medium deep soft foundation of numerous complicated.The supporting capacity, the control soil deformation that how effectively to improve deep soft soil foundation are in geotechnical engineering, to need one of difficult problem solving emphatically always.At present, the treatment measures of soft foundation are mainly contained to two classes, a class is consolidation, and another kind of is compound foundation method.
Consider that composite foundation has the advantages such as consolidation effect is good, the duration is short, settlement after construction is little, is widely applied in Base Consolidation Engineering.At present, conventional composite foundation reinforcing method has tube-sinking cast-in-situ pile, precast square pile, pile for prestressed pipe, plastic sleeve concrete pile etc., wherein, pile tube has that folk prescription bearing capacity of concrete-filled is high, side friction is large and the advantage such as anti-bending strength is good, selected by increasing Soft Ground engineering.From construction technology, pile tube can be divided into two kinds of prefabricated tubular pile and pouring pipe piles.Prefabricated tubular pile has that bearing capacity of single pile is high, pile quality is reliable, the resistance to hammering of pile body and the advantage such as crack resistance is good; But consider the factors such as transportation and construction, need suitably to strengthen amount of reinforcement to gain in strength, the destructiveness that opposing construction may bring, thus increased cost; Pouring pipe pile has that speed of application is fast, stake long can free adjustment, there is not the advantages such as weak section at pile extension place, its engineering adaptability is better, but because it adopts prior art difficulty of construction larger, in Practical Project, is not widely used.
The beginning of new century, Hohai University exploitation poured in place concrete thin-wall pipe pile reinforced soft soil ground patented technology < < for the sleeve pipe of weak sub-grade treatment, become mould pouring pipe pile with large diameter machine > > (ZL 01273182.X) and construction technology < < soft foundation composite ground base construction method for field pouring pipe pile with large diameter > > (CN 1367296A), adopting relevant art to carry out cast-in-situ concrete thin-wall construction, to have reached cost low, bearing capacity is high, the objects such as the stability increase of ground and foundation settlement reduction.
Yet, in practice of construction process, because cast in place concrete thin tunnel pile belongs to soil compaction class stake type, adjacent studs immersed tube sets and stake machine moves and can have a negative impact to the concrete pile body of not yet initial set, even if at piling order, constructure scheme optimization is carried out in the aspects such as device pile penetration, still there will be region, stake top pile body off normal, or the disease such as broken pile, pile body concrete disintegration, weak interlayer, have a strong impact on pile quality and the load-carrying properties of cast-in-situ concrete thin-wall.
At present, existing a kind of thin-wall pipe pile, comprise cross section be annular concrete pile body, be arranged on the reinforcing cage in described concrete pile body, and the end plate and the shroud ring that are fixed on described concrete pile body end, though this type is simple in structure, also the distortion of restrained pile end to a certain extent, but because constraint is only arranged at a tip position, be difficult to effectively solve mutual crimp and destruction problem between pile body.
In sum, cast-in-situ concrete thin-wall has the advantages such as applicability is strong, supporting capacity is high, anti-bending strength is good, but because pile tube diameter is large, tube wall is thin, easily when construction, there are some quality problems, cause the supporting capacity of pile body to be difficult to effective performance, have a strong impact on pile quality and Foundation Treatment Effect.
In view of the actual mass problem in current thin-wall pipe pile design and construction process, for effectively improving the supporting capacity of pile body, urgently invent at present a kind of adjacent pile driving construction disturbance little, can give full play to different layers position soil body supporting capacity, and can have consolidation advantage concurrently, reduce the reinforced cast in place concrete thin tunnel pile in novel top of top pile body negative friction.
Summary of the invention
The purpose of this utility model be to provide a kind of pile body reliable construction quality, adjacent pile driving construction soil compaction effect little, can bring into play the reinforced cast in place concrete thin tunnel pile in top that different layers position soil body supporting capacity, negative friction are little, have discharging consolidation treatment effect concurrently simultaneously.
For realizing above-mentioned technical purpose, the utility model has adopted following technical scheme:
The reinforced cast in place concrete thin tunnel pile in a kind of top, it is characterized in that described thin-wall pipe pile main body pile body adopts the cast-in-place pile of clad steel immersed tube, stake footpath, pile body top expands, and sets gradually from inside to outside plastic bushing and vertical drainage body in the outside of stake footpath expanding reach concrete pile body; Stake footpath expanding reach connects top precast pile tip, and pile body bottom connects bottom precast pile tip; The pile peripheral earth on thin-wall pipe pile top solidifies and is treated to curing soil layer; Between thin-wall pipe pile top and stake core closed section and pile cap decking, be provided with dowel; In pile cap decking, be provided with the drainage channel being communicated with vertical drainage body.
Curing soil layer evenly paves on whole construction plant, paving thickness 400 ~ 800mm, and 1.2 ~ 1.5 times of external diameter are designed for thin-wall pipe pile in the reserved aperture, hole that sets.
Clad steel immersed tube is comprised of interior immersed tube and the outer immersed tube of steel, and its China and foreign countries' immersed tube is arranged circumferentially on the edge, bottom of stake footpath expanding reach the protruding falcon being connected with top precast pile tip, takes same precast pile tip sink down into design bottom surface absolute altitude by vibration sinking tube method or static pressure method.
The upper surface of top precast pile tip is provided with outer immersed tube and connects protruding falcon, plastic bushing, limited impression that steel casing is corresponding; Upper surface at bottom precast pile tip is provided with the limited impression corresponding with clad steel immersed tube.
Described plastic bushing can adopt pvc pipe, PE pipe or the HDPE pipe of single wall screw.
Pile cap decking is cast-in-situ steel reinforced concrete cover plate, on the cover board along hoop, is evenly provided with the drainage channel being communicated with vertical drainage body, and is connected with drainage blanket.
The construction method of the reinforced cast in place concrete thin tunnel pile in above-mentioned top, comprises the following steps:
1) before construction, prepare: according to design drawing, process construction plant, measure pile body position, draw construction outline line, organizing construction's material, machinery, personnel are in place;
2) solidified earth that paves: the solidified earth that paves after construction plant is smooth or solidify on the spot after compacting shakeout, and according to a design stake footpath, the reserved hole that sets at place, stake position;
3) steel immersed tube and casing set: adopt vibration or static pressure, immersed tube method, plastic bushing, steel casing by the clad steel immersed tube connecting with precast pile tip together with its outside together set to design elevation;
4) fill water discharging body: in the toroidal cavity forming at plastic bushing, steel casing, top precast pile tip, fill medium coarse sand;
5) build pile concrete: according to designing requirement, put into after reinforcing cage, to clad steel immersed tube and bottom precast pile tip, enclose concrete perfusion in the toroidal cavity of formation;
6) immersed tube and steel casing are extracted: first clad steel immersed tube is slowly vibrated and extracted, above pull out in process and need to push down peripheral steel casing and plastic bushing, after immersed tube is thoroughly extracted, then extract steel casing;
7) stake top is filled up: after immersed tube and steel casing are extracted, high to design stake top mark to filling up concrete in plastic bushing immediately, and form and expand pile body and a stake core closed section;
8) dowel is imbedded: before concrete initial set, to thin-wall pipe pile top, insert with the top of stake core closed section the reinforcing bar being connected with pile cap decking;
9) build cover plate: according to designing requirement, install template, at stake top cast in situs pile cap decking.
the utlity model has following characteristics and beneficial effect:
(1) before pipe-sinking device presses down, the curing soil layer that paves on construction ground, can play simultaneously improve top soil body supporting capacity, reduce construction machinery to the disturbance of foundation soil, prevent the effect of pile body inclining.
(2) pile body top expands, and similarly straightens footpath pile body design, can give full play to the supporting capacity of different layers position foundation soil.
(3) vertical drainage body of pile body arranged outside both can reduce the impact of immersed tube when construction soil compaction effect on pile quality, also can accelerate the discharging consolidation of the top soil body, reduced the negative friction of pile body, had avoided, because of top, the waterproof problem of solidifying soil layer is set.
(4) setting of plastic bushing not only can be used as the template of pile body concreting, and cement paste infiltrates in vertical drainage body can prevent that coagulation from building time.
In a word, the utility model not only can reduce the impact of pile body construction on adjacent stake, guarantees construction quality; And can give full play to the supporting capacity of the different layers position soil body; The discharging consolidation that can also accelerate top pile peripheral earth, reduces negative friction, can prevent from, because mud belt goes out the pile body distortion that earth's surface causes, having good technical economic benefit simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the reinforced cast in place concrete thin tunnel pile in a kind of top of the utility model;
Fig. 2 is a kind of top of the utility model reinforced Pile Using Cast-in-situ device schematic diagram;
Fig. 3 is that the upper surface notch of described top precast pile tip is arranged schematic diagram;
Fig. 4 .1 ~ 4.8th, the construction process schematic diagram of the reinforced cast in place concrete thin tunnel pile in a kind of top of the utility model;
Wherein: 1-solidifies immersed tube, 6-vertical drainage body, 7-top expansion pile body, 8-cast in place concrete thin tunnel pile, 9-stake core closed section, 10-dowel, 11-drainage channel, the cast-in-place cover plate of 12-, 13-top precast pile tip, 14-bottom precast pile tip, 15-in soil layer, 2-steel casing, 3-plastic bushing, the outer immersed tube of 4-, 5-and connects protruding falcon, 16-soft layer, the relative hardpan of 17-, 18-plastic bushing stopper slot, 19-steel casing stopper slot, the protruding falcon embedded groove of 20-.
The specific embodiment
The cutting of present embodiment light plate, welding procedure technical requirements, reinforcing cage colligation construction technical requirement, the technical requirements of precast pile tip design and construction, vibration sinking tube construction technical requirement, pile concrete mix-design and pouring technique requirement, medium coarse sand particle filling Construction Technique requirement etc. is not repeated, and emphasis is set forth the embodiment that the utility model relates to structure.
Fig. 1 is the schematic diagram of the reinforced cast in place concrete thin tunnel pile in a kind of top of the utility model, Fig. 2 is a kind of top of the utility model reinforced Pile Using Cast-in-situ device schematic diagram, and Fig. 3 is that the upper surface notch of described top precast pile tip is arranged schematic diagram.Shown in Fig. 1 ~ 3, the reinforced cast in place concrete thin tunnel pile in a kind of top of the utility model is mainly comprised of curing soil layer 1, vertical drainage body 6, top expansion pile body 7, cast in place concrete thin tunnel pile 8, stake core closed section 9, top precast pile tip 13, bottom precast pile tip 14.Thin-wall pipe pile pile body 8 stake footpaths, top expand and form expansion pile body 7, in the outside that expands pile body 7, set gradually from inside to outside plastic bushing 3 and vertical drainage body 6; Top expands the bottom of pile body 7 and the bottom of cast in place concrete thin tunnel pile 8 arranges respectively top precast pile tip 13 and bottom precast pile tip 14; Curing being treated to of pile peripheral earth on thin-wall pipe pile 8 tops solidified soil layer 1, adopts concrete shutoff thin-wall pipe pile upper cavity to form a stake core closed section 9; Between thin-wall pipe pile 8 tops and the cast-in-place cover plate 12 of stake core closed section 9 and stake top, dowel 10 is set; In pile cap decking 12, be provided with the drainage channel 11 being communicated with vertical drainage body 6.
The thickness that solidifies soil layer 1 is 500mm, and the spoir and the cement mix that adopt cleaning construction plant to produce form; The 7d compressive strength of solidified earth 1 should be greater than 0.8MPa, and it is 5% that cement mixes mass ratio, adopts 32.5
#portland cement; Solidified earth is not filled within the scope of 1.2 times of stake footpaths in stake position.
It is 1000mm that steel casing 2 adopts external diameter, the Q345 seamless steel pipe that thickness is 16mm, long 1500mm.
Plastic bushing 3 adopts pvc pipe material, and diameter is 800mm, and thickness is 2mm, and length is 1400mm.
Clad steel immersed tube is comprised of outer immersed tube 4 and the interior immersed tube 5 of steel, and inside and outside immersed tube all adopts Q345 seamless steel pipe, and thickness is 20mm; The external diameter of its China and foreign countries' immersed tube 4 is 680mm, bottom at stake footpath expanding reach evenly arranges 4 protruding falcons 15 that are connected with top precast pile tip 13 along hoop, protruding falcon 15 is trapezoidal, upper base is long is 40mm, going to the bottom long is 80mm, and height is 80mm, and adopting the strength grade of steel is Q345, thickness is 20mm, go to the bottom and outer immersed tube 4 between be welded to connect; The external diameter of interior immersed tube 5 is 400mm.
Vertical drainage body 6 is located at the outside of plastic bushing 3, by the uniform medium coarse sand of particle diameter, is filled and is formed.
The profile of top precast pile tip 13 is hollow ring, and section is isosceles right triangle, and external diameter is 1100mm, and internal diameter is 690mm, and height is 250mm; In upper surface inner side along the protruding falcon embedded groove 20 that is arranged circumferentially 4 places and is connected with protruding falcon 15 on outer immersed tube 4, and plastic bushing stopper slot 18 and steel casing stopper slot 19 respectively together with, depth of groove is 40mm, the concrete strength grade of pile top is C35, employing 42.5
#portland cement.
Before the concrete initial set of stake top, on stake top, upper surface evenly inserts dowel 10 along hoop, and it is the indented bars that 12mm, strength grade are Q235 that connecting reinforcement 10 adopts diameter.
After integrity is qualified, on-the-spot formwork, builds pile cap decking 12, and the strength grade of concrete of cover plate 12 is C30; The position pre-buried drainage channel 11 corresponding with vertical drainage body 6 on pile cap decking 12; Drainage channel 11 adopts the pvc pipe that diameter is 30mm, and the degree of depth of inserting vertical drainage body is not less than 50mm.
With reference to shown in 4.1 ~ 4.8, main construction sequence of the present utility model is as follows:
1) before construction, prepare: according to design drawing, process construction plant, measure pile body position, draw construction outline line, organizing construction's material, machinery, personnel are in place;
2) solidified earth that paves: the solidified earth 1 that paves after construction plant is smooth, and the reserved stake in place, 1.2 times of stake footpaths sets space in stake position;
3) steel immersed tube and casing set: adopt vibration sinking tube method, the outer immersed tube 4, interior immersed tube 5, the steel casing 2 that connect with bottom precast pile tip 14 and top precast pile tip 13 are together set to design elevation together with plastic bushing 3;
4) fill water discharging body: in the toroidal cavity forming at plastic bushing 3, steel casing 2, top precast pile tip 13, fill medium coarse sand, form vertical drainage body 6;
5) build pile concrete: according to designing requirement, put into after reinforcing cage the toroidal cavity that outwards immersed tube 4, interior immersed tube 5 and bottom precast pile tip 14 form, and concrete perfusion in the toroidal cavity of outer immersed tube 5, plastic bushing 3 and 13 formation of top precast pile tip;
6) immersed tube and steel casing are extracted: first outer immersed tube 4, interior immersed tube 5 are slowly vibrated and extracted, above pull out and in process, need to push down peripheral steel casing 2 and plastic bushing 3; After outer immersed tube 4, interior immersed tube 5 are thoroughly extracted, then extract steel casing 2, plastic bushing 3 stays in ground;
7) stake top is filled up: after outer immersed tube 4, interior immersed tube 5 and steel casing 2 are extracted, high to design stake top mark to filling up concrete in plastic bushing 3 immediately, and form and expand pile body 7 and a stake core closed section 9, filling concrete strength grade is C30;
8) dowel is imbedded: before concrete initial set, to thin-wall pipe pile 8 tops, insert with the top of stake core closed section 9 reinforcing bar 10 being connected with pile cap decking 12;
9) build cover plate: according to designing requirement, install template, at stake top cast in situs pile cap decking 12.
Claims (6)
1. the reinforced cast in place concrete thin tunnel pile in top, it is characterized in that described thin-wall pipe pile main body pile body adopts the cast-in-place pile of clad steel immersed tube, stake footpath, pile body top expands, and sets gradually from inside to outside plastic bushing and vertical drainage body in the outside of stake footpath expanding reach concrete pile body; Stake footpath expanding reach connects top precast pile tip, and pile body bottom connects bottom precast pile tip; The pile peripheral earth on thin-wall pipe pile top solidifies and is treated to curing soil layer; Between thin-wall pipe pile top and stake core closed section and pile cap decking, be provided with dowel; In pile cap decking, be provided with the drainage channel being communicated with vertical drainage body.
2. the reinforced cast in place concrete thin tunnel pile in a kind of top according to claim 1, it is characterized in that described curing soil layer evenly paves on whole construction plant, paving thickness 400 ~ 800mm, 1.2 ~ 1.5 times of external diameter are designed for thin-wall pipe pile in the reserved aperture, hole that sets.
3. the reinforced cast in place concrete thin tunnel pile in a kind of top according to claim 1, it is characterized in that described clad steel immersed tube is comprised of interior immersed tube and the outer immersed tube of steel, its China and foreign countries' immersed tube is arranged circumferentially on the edge, bottom of stake footpath expanding reach the protruding falcon being connected with top precast pile tip, takes same precast pile tip sink down into design bottom surface absolute altitude by vibration sinking tube method or static pressure method.
4. the reinforced cast in place concrete thin tunnel pile in a kind of top according to claim 3, is characterized in that upper surface at top precast pile tip is provided with outer immersed tube and connects protruding falcon, plastic bushing, limited impression that steel casing is corresponding; Upper surface at bottom precast pile tip is provided with the limited impression corresponding with clad steel immersed tube.
5. the reinforced cast in place concrete thin tunnel pile in a kind of top according to claim 1, is characterized in that described plastic bushing can adopt pvc pipe, PE pipe or the HDPE pipe of single wall screw.
6. the reinforced cast in place concrete thin tunnel pile in a kind of top according to claim 1, it is characterized in that described pile cap decking is cast-in-situ steel reinforced concrete cover plate, on the cover board along hoop, be evenly provided with the drainage channel being communicated with vertical drainage body, and be connected with drainage blanket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320597552.6U CN203498828U (en) | 2013-09-26 | 2013-09-26 | Top reinforced cast-in-place concrete thin-wall pipe pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320597552.6U CN203498828U (en) | 2013-09-26 | 2013-09-26 | Top reinforced cast-in-place concrete thin-wall pipe pile |
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| CN203498828U true CN203498828U (en) | 2014-03-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510511A (en) * | 2013-09-26 | 2014-01-15 | 鸿厦建设有限公司 | Top-reinforced cast-in-place concrete thin-wall pipe pile and construction method |
| CN110258542A (en) * | 2019-06-15 | 2019-09-20 | 武汉中力岩土工程有限公司 | A kind of soft soil foundation reinforcing method based on the concrete-cored stake of cement concrete |
| CN110700253A (en) * | 2019-10-31 | 2020-01-17 | 花王生态工程股份有限公司 | Novel steel of lake plank road is exclusively used in and is protected a section of thick bamboo |
-
2013
- 2013-09-26 CN CN201320597552.6U patent/CN203498828U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510511A (en) * | 2013-09-26 | 2014-01-15 | 鸿厦建设有限公司 | Top-reinforced cast-in-place concrete thin-wall pipe pile and construction method |
| CN103510511B (en) * | 2013-09-26 | 2015-05-27 | 鸿厦建设有限公司 | Top-reinforced cast-in-place concrete thin-wall pipe pile and construction method |
| CN110258542A (en) * | 2019-06-15 | 2019-09-20 | 武汉中力岩土工程有限公司 | A kind of soft soil foundation reinforcing method based on the concrete-cored stake of cement concrete |
| CN110700253A (en) * | 2019-10-31 | 2020-01-17 | 花王生态工程股份有限公司 | Novel steel of lake plank road is exclusively used in and is protected a section of thick bamboo |
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