CN203066098U - Built-in externally-wrapped double-layer water discharge body and middle concrete composite pile and special immersed tube thereof - Google Patents
Built-in externally-wrapped double-layer water discharge body and middle concrete composite pile and special immersed tube thereof Download PDFInfo
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- CN203066098U CN203066098U CN 201320053230 CN201320053230U CN203066098U CN 203066098 U CN203066098 U CN 203066098U CN 201320053230 CN201320053230 CN 201320053230 CN 201320053230 U CN201320053230 U CN 201320053230U CN 203066098 U CN203066098 U CN 203066098U
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Abstract
The utility model relates to a built-in externally-wrapped double-layer water discharge body and middle concrete composite pile and a special immersed tube thereof. The composite pile comprises an annular water discharge body on the inner side of a pile body, a cast-in-place concrete thin-walled tube pile body, an annular water discharge body on the outer side of the pile body, a precast pile tip and a precast reinforced concrete cover plate, wherein the precast pile tip is arranged at the bottom of the composite pile; four annular grooves used for limiting a position of the immersed tube are formed on the top face of the pile tip; the precast reinforced concrete cover plate is arranged at the top of the composite pile; water discharge branch tubes are arranged in the cover plate; the immersed tube of the composite pile consists of four annular steel tubes, namely a first inner immersed tube, a second inner immersed tube, a third inner immersed tube and an outer immersed tube from the inside out; and inner steel plate supports are uniformly and longitudinally welded between the first inner immersed tube and the second inner immersed tube, and between the third inner immersed tube and the outer immersed tube. According to the built-in externally-wrapped double-layer water discharge body and middle concrete composite pile and the special immersed tube, the water discharge bodies in uniform thicknesses are arranged on the inner side and the outer side of the concrete tube pile, so that a concretion rate of a soil body between the piles can be increased; the bearing capacity of foundation soil can be improved; damages such as pile breaking due to a squeezing effect during adjacent pile driving can be avoided; and the built-in externally-wrapped double-layer water discharge body and middle concrete composite pile and the special immersed tube have better technical and economic benefits.
Description
Technical field
The utility model relates to a kind of built-in outsourcing double-layer drainage body and middle concrete combined pile reaches
Its special-purpose immersed tube, can accelerate the weak soil discharging consolidation, soil compaction effect between stake when weakening adjacent stake and setting, prevent that the broken pile disease from appearring in situ concrete pile.Belong to the foundation engineering field, the ground that is suitable for engineerings such as soft clay area highway, municipal administration, airport and dykes and dams is handled.
Background technology
China's soft foundation is of a great variety, widely distributed, generally has the moisture content height, characteristics such as compressibilty is big, intensity is low, bad hydraulic permeability.Problems such as total settlement is excessive, relative settlement obvious, the posterior settlement amount exceeds standard, supporting capacity deficiency often appear in the building that is built on the soft foundation, influence normal functional performance and the security performance of building.To this, for improving the supporting capacity of soft foundation, emerged a large amount of soft foundation processing technologies both at home and abroad, as consolidation, composite foundation reinforcing method, change and fill out etc.
Consolidation is that longitudinal drainage body (sand drain, sand wick, plastic draining board etc.) and transverse row water body (rubble french drain, drainage blanket etc.) are set in ground earlier, apply prefabricating load then, make the pore water in the soil body pass through to discharge to drainage system in length and breadth, the soil body is fixed gradually, and foundation strength progressively improves.The ground disposal cost of consolidation is lower, has been widely used at present in the large-area soft ground processing.
Composite foundation reinforcing method originates from the sixties in 20th century, owing to can significantly improve the bearing capacity of ground, reduce foundation settlement, and effectively suppress these characteristics of foundation soil body lateral deformation and become a kind of more satisfactory Soft Ground mode, worldwide all be used widely.Cast-in-place concrete thin-walled pile tube is a kind of composite foundation reinforcing method that has absorbed the advantage of technology such as the heavy mould thin cutoff wall of pile for prestressed pipe, vibrator sunk pile and vibration.Compare with other types and to have: can obviously improve subgrade rating; The stake surface area is big, and folk prescription bearing capacity of concrete-filled height can be saved concrete in a large number, lowers cost; Speed of application is very fast, and pile quality is stable; Construction technology is simple, and quality control is easy, and is easy to detect etc.At present, this technology also has been successfully applied in the large tracts of land treatment of soft foundation engineerings such as speedway, high-speed railway.
Although consolidation and cast-in-place concrete thin-walled pile tube all have stronger using value, but in actual engineering, these processing methods have all shown some shortcomings: the engineering time of consolidation is longer, it is limited that the bulk strength that groundwork is finished in reinforcing promotes amplitude, and the later stage deflection is bigger; The soil compaction effect that the foundation pile of cast-in-place concrete thin-walled pile tube sets in the process is fairly obvious, causes the destruction of adjacent pilework easily, and simultaneously, the pile body construction can destroy the structural of inter-pile soil body, influences the carrying effect of the soil body etc.
The method of at present existing Combination application consolidation and compound foundation method, as the concrete core sand-gravel pile, namely fill a kind of combined pile that forms behind the rubble in the prefabricated tubular pile outside, under suitable engineering background and geological conditions, also obtained relative good engineering effect.But these combined pile finish not consider the shutoff drainage channel in the precompressed phase, cause vertical drainage body still to have draining after the engineering completion, lure soft soil consolidation into, the effect of settlement of soft foundation, easily cause construction to be built and produce excessive settlement after construction; The vertical drainage body of some type both sides is discontinuous, and drainage effect is not good enough.
In sum, be used for the treatment of soft foundation measure at present and mainly contain consolidation and composite foundation method.When considering the influencing of cost factor, adopting the draining preloading method usually is that main, composite foundation method is the treatment of soft foundation thinking of assisting, but these two class methods all exist deficiency and limitation.The method of existing Combination application discharging consolidation and composite foundation combination, though can take into account the advantage of consolidation and compound foundation method to a certain extent, solve aspect the technical problems such as water discharging body is vertical continuously, the effective control of settlement after construction perfect inadequately.Given this, still need at present and invent a kind of length that can take into account consolidation and compound foundation method, can effectively control the novel compound pile of post-construction deformation again.
Summary of the invention
The purpose of this utility model is to fully utilize the length of sand drain concretion method and pipe pile composite foundation method, a kind of rate of consolidation that both can accelerate the inter-pile soil body is provided, improve the foundation soil supporting capacity, reach owing to soil compaction effect causes the composite pile type of pile body structural deterioration in the time of can avoiding adjacent stake to set again.
In order to realize above-mentioned technical purpose, the utility model has adopted following technical scheme:
A kind of built-in outsourcing double-layer drainage body and middle concrete combined pile is characterized in that compound pile is made up of pile body interior annular water discharging body, cast-in-place concrete thin-walled tubular pile body, pile body exterior annular water discharging body, precast pile tip, prefabricated reinforced concrete cover plate; Precast pile tip is arranged at the bottom of compound pile, and stake pinnacle face is provided with the annular groove that four roads are used for restriction immersed tube position; The prefabricated reinforced concrete cover plate is arranged at the top of compound pile, and cover plate inside is provided with branch drain.
Stake end precast pile tip is the reinforced concrete pile point, and is embedded with spacing steel pipe, is used for limiting the immersed tube position, prevents that immersed tube from producing displacement.
Pile body interior annular water discharging body and exterior annular water discharging body are gravel, rubble or melon seeds sheet.
The utility model also provides a kind of immersed tube that is exclusively used in the combinations thereof stake, it is characterized in that, described compound pile immersed tube is made up of four layers of annular steel pipe, is respectively immersed tube and outer immersed tube in immersed tube in first, the second interior immersed tube, the 3rd from the inside to the outside; In first in the immersed tube and second between the immersed tube, and in the 3rd between immersed tube and the outer immersed tube, longitudinally evenly be welded with the interior support of steel plate, each immersed tube can insert respectively in the four road annular grooves of described precast pile tip end face; Establish 3 highly different material inlets in the batch meter, funnel bottom is inserted respectively in the annular space that surrounds between described each layer immersed tube.
Be supported in the steel plate in each cross section along annular and lay 3 ~ 4, and should be welded in advance on the lateral wall that forms inboard steel pipe in two steel pipes that medium coarse sand pours into the space.
After immersed tube set and finishes, concrete perfusion in the annular space that forms between the immersed tube in the immersed tube and the 3rd in second by batch meter, and vibratory compaction formed cast-in-place concrete thin-walled tubular pile body; After treating that concreting is finished, simultaneously between the first interior immersed tube and the second interior immersed tube, and fill adrainage material in the formed annular space, formation pile body interior annular water discharging body and pile body exterior annular water discharging body between the 3rd interior immersed tube and the outer immersed tube.
Pile cap decking is the prefabricated reinforced concrete cover plate, the interior branch drain along default two rows of annular and bottom water discharging body UNICOM of cover plate, branch drain is connected with the embankment drain header, the precompressed phase with roadbed in moisture cause embankment toe place, play drainage channel, after the precompressed phase, slip casting shutoff gutter is to reduce later stage consolidation settlement amount.
The job practices of built-in outsourcing double-layer drainage body of the present utility model and middle concrete combined pile comprises following construction sequence:
Step 8, superstructure construction: in reinforcing area, lay certain thickness sand cushion, lay geo-grid reinforcement layer on the stake top, carry out embankment, road structure construction by designing requirement subsequently;
Step 9, sealing gutter: after treating that the road structure construction is finished, gutter is sealed.
After pile body construction was finished, branch drain was connected with the embankment drain header, the precompressed phase with roadbed in moisture cause embankment toe place, play drainage channel, after the precompressed phase, slip casting shutoff gutter.
The utlity model has following advantage and beneficial effect:
(1) in first in the immersed tube and second between the immersed tube, and pour into medium coarse sand in the formed annular space between immersed tube and the outer immersed tube in the 3rd, form the uniform inboard vertical drainage body of thickness and outside vertical drainage body, inter-pile soil was to the extrusion effect of pile body in the time of both can having reduced adjacent stake and set, can form the vertical drainage passage again, accelerate the fixed of inter-pile soil body.
(2) penetration concrete in the annular space that forms between the immersed tube in the immersed tube and the 3rd in second forms the concrete stiff-core pile body, helps to improve the supporting capacity of pile body.
(3) default branch drain is connected with the embankment drain header on the prefabricated reinforced concrete cover plate, and moisture causes embankment toe place in the precompressed phase can be with roadbed, plays drainage channel; The precompressed phase is slip casting shutoff gutter later, can reduce settlement amount after construction.
(4) end face of precast concrete pile point is provided with four grooves that are connected with the top immersed tube, but the relative distance between the operative constraint immersed tube.
In a word, characteristics of the present utility model are to collect the length of consolidation and compound foundation method, reducing between the cast-in-situ concrete pile tube in the soil compaction effect, accelerated the discharging consolidation of inter-pile soil body, realize quick raising bearing capacity of foundation soil, improved the purpose of pile quality.
Description of drawings
Fig. 1 is the utility model built-in outsourcing double-layer drainage body and middle concrete combined pile longitudinal sectional drawing;
Fig. 2 is that Fig. 1 is along the cross section sectional view of A-A line;
Fig. 3 is that Fig. 1 is along the stake pinnacle face sectional view of B-B line;
Fig. 4 is built-in outsourcing double-layer drainage body and middle concrete combined pile immersed tube cross section sectional view;
Fig. 5 is built-in outsourcing double-layer drainage body and middle concrete combined pile batch meter sectional view;
Fig. 6 is built-in outsourcing double-layer drainage body and the main construction process figure of middle concrete combined pile.
Among the figure: 1-pile body interior annular water discharging body; 2-cast-in-place concrete thin-walled tubular pile body; 3-pile body exterior annular water discharging body; 4-prefabricated reinforced concrete cover plate; 5-precast pile tip; 6-spacing steel pipe; 7-annular stop groove; Immersed tube in 8-the first; Immersed tube in 9-the second; Immersed tube in 10-the three; 11-outer immersed tube; Support in 12-steel plate; 13-branch drain; 14-interior annular water discharging body material inlet; 15-cast-in-place concrete thin-walled pile tube material inlet; 16-exterior annular water discharging body material inlet; 17-batch meter; 18-soft layer; 19-hard substratum.
Specific embodiment
The concrete design and construction requirement of pile body, reinforcing bar welding procedure technical requirements, embankment drain header laying construction technology etc. are not repeated in the present embodiment, and emphasis is set forth the embodiment that the utility model relates to structure.
Fig. 1 is the utility model built-in outsourcing double-layer drainage body and middle concrete combined pile longitudinal sectional drawing, Fig. 2 is that Fig. 1 is along the cross section sectional view of A-A line, Fig. 3 is that Fig. 1 is along the stake pinnacle face sectional view of B-B line, built-in outsourcing double-layer drainage body and middle concrete combined pile shown in Fig. 1 ~ 3 mainly are made up of pile body interior annular water discharging body 1, cast-in-place concrete thin-walled tubular pile body 2, pile body exterior annular water discharging body 3, prefabricated reinforced concrete cover plate 4, precast pile tip 5.
Concrete precast pile point 5 is arranged at the bottom of compound pile, and stake pinnacle face is provided with four annular stop grooves 7 that are used for restriction immersed tube position, and the sharp cement of stake adopts 42.5
#Portland cement, strength grade of concrete are C30; Simultaneously be embedded with spacing steel pipe 6 at precast pile tip, be used for limiting the immersed tube position, prevent that immersed tube from producing displacement.
Prefabricated reinforced concrete cover plate 4, diameter are 1500mm, and height is 250mm; Along the branch drain 13 of the default twice of annular and bottom water discharging body UNICOM, the branch drain quantity in each road is 4, evenly lays ringwise in the prefabricated reinforced concrete cover plate 4.It is interior that the diameter of gutter is 50mm along the default PVC branch drain 13 of annular, thickness of pipe 4.5mm, and quality and dimensional requirement satisfy the regulation of current standard; This branch drain 13 is connected with embankment PVC drain header, the precompressed phase with roadbed in moisture cause embankment toe place, after the precompressed phase finishes with the 13 slip casting shutoff of PVC branch drain, control posterior settlement speed.
Fig. 4 is built-in outsourcing double-layer drainage body and middle concrete combined pile immersed tube cross section sectional view, pile body immersed tube as shown in Figure 4, formed by four layers of annular steel pipe, be respectively immersed tube 10 and outer immersed tube 11 in immersed tube 8 in first, the second interior immersed tube 9, the 3rd from the inside to the outside.Each immersed tube wall is seamless steel pipe, and the strength grade of steel is Q235, and thickness is 20mm, and the steel pipe sizes specification should satisfy the requirement of existing corresponding standard.
9 distances of immersed tube are 100mm in the first interior immersed tube 8 and second, and 10 distances of immersed tube are 200mm in the second interior immersed tube 9 and the 3rd, and the 3rd interior immersed tube 10 and 11 distances of outer immersed tube are 100mm, and the external diameter of the 3rd interior immersed tube 10 is 1000mm.
In first in the immersed tube 8 and second between the immersed tube 9, in the 3rd immersed tube 10 and outside longitudinally in one steel plate of 1,000mm spacing setting, support 12 between the immersed tube 11, support 12 in the steel plate and in same horizontal plane, lay four, hoop is evenly laid; The length of interior support 12 is 80mm, and width 120mm, thickness are 10mm, and the strength grade of steel is Q235; Supporting 12 in the steel plate should be welded on the lateral wall of immersed tube 10 in the first interior immersed tube 8 and the 3rd in advance.
Fig. 5 is built-in outsourcing double-layer drainage body and middle concrete combined pile batch meter 17 sectional views, and as shown in Figure 5, the inside of batch meter 17 is provided with 3 highly different material inlets, and the upper opening width of each material inlet is 500mm; Insert respectively in the annular space that surrounds between described each layer immersed tube the bottom of batch meter 17, and the thickness of batch meter 17 used steel plates is 8mm, and the strength grade of steel is Q235.
After immersed tube set and finishes, concreting in the toroidal cavity that immersed tube 10 forms in the immersed tube 9 and the 3rd in second formed cast-in-place concrete thin-walled tubular pile body 2, and cement adopts 42.5
#Portland cement, strength grade of concrete are C30.
After treating that intermediate layer concreting is finished, simultaneously insert the uniform medium coarse sand of particle diameter, formation pile body interior annular water discharging body 1 and pile body exterior annular water discharging body 3 in the annular space that immersed tube 10 and outer immersed tube 11 surround in the immersed tube 9, the 3rd in the immersed tube 8 and second in first.
Pull out in the process in the immersed tube vibration, interior annular water discharging body 1 and pile body exterior annular water discharging body 3 are carried out aerial feed supplement.
Immersed tube is extracted the back and is established prefabricated reinforced concrete cover plate 4 on the stake top, and cover plate cement adopts 42.5
#Portland cement, strength grade of concrete are C30, and steel strength grade is Q235, and diameter is 16mm.
Fig. 6 is built-in outsourcing double-layer drainage body and the main construction process figure of middle concrete combined pile, and as shown in Figure 6, the job practices of above-mentioned built-in outsourcing double-layer drainage body and middle concrete combined pile comprises following construction sequence:
Step 8, superstructure construction: in reinforcing area, lay certain thickness sand cushion, lay geo-grid reinforcement layer on the stake top, carry out embankment, road structure construction by designing requirement subsequently;
Step 9, sealing gutter: after treating that the road structure construction is finished, according to the sedimentation situation, seal branch drain 13 in good time.
Claims (4)
1. a built-in outsourcing double-layer drainage body and middle concrete combined pile is characterized in that compound pile is made up of pile body interior annular water discharging body, cast-in-place concrete thin-walled tubular pile body, pile body exterior annular water discharging body, precast pile tip, prefabricated reinforced concrete cover plate; Precast pile tip is arranged at the bottom of compound pile, and stake pinnacle face is provided with the annular groove that four roads are used for restriction immersed tube position; The prefabricated reinforced concrete cover plate is arranged at the top of compound pile, and cover plate inside is provided with branch drain.
2. built-in outsourcing double-layer drainage body according to claim 1 and middle concrete combined pile is characterized in that described precast pile tip is the reinforced concrete pile point, and are embedded with spacing steel pipe.
3. built-in outsourcing double-layer drainage body according to claim 1 and middle concrete combined pile is characterized in that, described pile body interior annular water discharging body and exterior annular water discharging body are gravel, rubble or melon seeds sheet.
4. be exclusively used in the immersed tube of the described compound pile of the arbitrary claim of claim 1-3, it is characterized in that, described compound pile immersed tube is made up of four layers of annular steel pipe, is respectively immersed tube and outer immersed tube in immersed tube in first, the second interior immersed tube, the 3rd from the inside to the outside; In first in the immersed tube and second between the immersed tube, and in the 3rd between immersed tube and the outer immersed tube, longitudinally evenly be welded with the interior support of steel plate; Each immersed tube can insert respectively in the four road annular grooves of described precast pile tip end face; Establish 3 highly different material inlets in the batch meter, funnel bottom is inserted respectively in the annular space that surrounds between described each layer immersed tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320053230 CN203066098U (en) | 2013-01-29 | 2013-01-29 | Built-in externally-wrapped double-layer water discharge body and middle concrete composite pile and special immersed tube thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320053230 CN203066098U (en) | 2013-01-29 | 2013-01-29 | Built-in externally-wrapped double-layer water discharge body and middle concrete composite pile and special immersed tube thereof |
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| CN203066098U true CN203066098U (en) | 2013-07-17 |
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| CN 201320053230 Expired - Fee Related CN203066098U (en) | 2013-01-29 | 2013-01-29 | Built-in externally-wrapped double-layer water discharge body and middle concrete composite pile and special immersed tube thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061332A (en) * | 2013-01-29 | 2013-04-24 | 新宇建设有限公司 | Integrally-arranged and externally-wrapped double-layered water discharging body and middle concrete combined pile and construction method |
| CN103485334A (en) * | 2013-09-18 | 2014-01-01 | 上海嘉实（集团）有限公司 | Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method |
-
2013
- 2013-01-29 CN CN 201320053230 patent/CN203066098U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061332A (en) * | 2013-01-29 | 2013-04-24 | 新宇建设有限公司 | Integrally-arranged and externally-wrapped double-layered water discharging body and middle concrete combined pile and construction method |
| CN103061332B (en) * | 2013-01-29 | 2015-01-14 | 新宇建设有限公司 | Integrally-arranged and externally-wrapped double-layered water discharging body and middle concrete combined pile and construction method |
| CN103485334A (en) * | 2013-09-18 | 2014-01-01 | 上海嘉实（集团）有限公司 | Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method |
| CN103485334B (en) * | 2013-09-18 | 2015-07-15 | 上海嘉实（集团）有限公司 | Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20190129 |