CN1827925A - Immersed tube prefabricated multistage under-reamed pile - Google Patents
Immersed tube prefabricated multistage under-reamed pile Download PDFInfo
- Publication number
- CN1827925A CN1827925A CN 200610046160 CN200610046160A CN1827925A CN 1827925 A CN1827925 A CN 1827925A CN 200610046160 CN200610046160 CN 200610046160 CN 200610046160 A CN200610046160 A CN 200610046160A CN 1827925 A CN1827925 A CN 1827925A
- Authority
- CN
- China
- Prior art keywords
- pile
- pile body
- immersed tube
- cast
- reamed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a sink tube prepare steel bottom enlarge picket, especially relating to a sink tube prepared multi-stage bottom enlarge picket. The invention is formed by a picket and an on-site irrigate base at pan. Wherein, said picket is formed by at least two sections between which there is one on-site irrigate base, via their upper and lower inserting bars to fix said base as a whole. The invention can effectively improve the bearing ability of single picket and the utilization of material strength. And it has wider applications in high and lower buildings, and variable safe standards and soil qualities.
Description
Affiliated technical field
The present invention relates to a kind of pipe sinking prefabricated steel concrete club-footed pile, particularly relate to a kind of immersed tube prefabricated multistage under-reamed pile, is expanded bore pile first-selected in the highrise building foundation engineering, also is applicable in the building of other any ground soil properties, safe class to use.
Background technology
At present in the pile foundation engineering of ground, adopt three kinds of tube-sinking cast-in-situ pile, preformed pile and large diameter bored piles usually.Wherein the large diameter bored pile bearing capacity is the highest, but its involve great expense, work efficiency is low, and is and seriously polluted during construction, so only be used for highrise building and the high building of requirement for bearing capacity.The quality of preformed pile is good, bearing capacity is also higher, but its cost is also high, generally is used for the higher building of safe class.All belong to friction pile by the described three kinds of stakes of classifying of holding capacity situation.What wherein be most widely used is tube-sinking cast-in-situ pile, accounts for 50% of all kinds of stake total quantitys, and this pile body is a cast-in-situ steel concrete, and pile crown is prefabricated; When executing, earlier the prefabricated pile crown of immersed tube is imbedded the hardpan in the ground, irritate concrete cast pile then; But because the soil property age difference that the earth's crust forms, soft foundation is soft usually with the increase of the crust layer degree of depth, hardpan is alternately state, like this when continuous piling construction, after execute stake and can produce extruding soil layer, the stake that will have influence on perfusion formerly and not solidify fully as yet, especially especially serious at the intersection of weak soil layer and hardpan, broken pile often appears, necking, thereby cause having approximately can't meet the quality requirement of tube-sinking cast-in-situ pile of 10-20%, force the designer to reduce the standard of bearing capacity of single pile, cause down stake to be gathered, cause soil body gross distortion, even jeopardize the quality of pile body; This another shortcoming is that bearing capacity is low, for increasing bearing capacity, the general way that adopts at the bottom of after irritating concrete cast pile body, adding companding, mode makes the uncertain and standard of its shape size at the bottom of the companding but because of its utilization adds, its application is limited to, the patent No. is to disclose multiple pipe sinking prefabricated steel concrete club-footed pile among the ZL97105261.1 for these reasons, better solved the existing defective of foundation pile ago, however because expanded bore pile bottom diameter routine can reach 1.5-1.7 rice, expand floor space and can reach 2.3 square metres, this just makes base diameter be limited to described scope, if for improving the bearing capacity of single pile, base diameter is excessive not only can to increase constructional difficulties, and can have a negative impact to the performance of its end load, cause the bearing capacity of demarcation to be had a greatly reduced quality, that is to say and attempt again the mode of enlarged base diameter to improve the potentiality of bearing capacity of single pile very limited, be difficult to break through.Therefore make its application be subjected to certain limitation.
Summary of the invention
The present invention is directed to the problem that prior art exists, for more giving full play to bearing capacity of foundation slab, the pile body of the different stressing conditions of one-tenth capable of being combined, it is a kind of change bearing capacity pile, its highly versatile applied widely, no matter be high level or low-rise building, also be that the building of what safe class all is suitable for, can also adapt to different regions soil layer geology situation of change more satisfactoryly, obviously improve strength of materials utilization rate; Make bearing capacity of single pile higher, and be in work under the most economical rational state all the time, improved the use value of stake greatly, and reach the immersed tube prefabricated multistage under-reamed pile of the Expected Results of design.
The technical scheme that technical solution problem of the present invention is adopted is: immersed tube prefabricated multistage under-reamed pile, form by pile body and the Cast-in-place concrete base that is positioned at hardpan, its described pile body is formed by two sections at least, be provided with a Cast-in-place concrete base between the two at it, and the anchor connection of Cast-in-place concrete base become an integral body by its joint bar up and down separately.
The center of described base is coaxial with the pile body center.
Be provided with the radiation muscle in the described base.
The vertical section of described base is the down big little trapezoidal profile line of, and does not limit as for the concrete shape of base, and its bottom surface is the plane, a kind of in convex surface and the concave surface.
Each of described pile body section is a kind of in precast prestressed concrete pile body, high-strength prestressed concrete pile body, no prestressed concrete pile body, steel pipe pile body, tubulose precast pile and the cast-in-place pile body or mixes.
The cross section of described each section of pile body is sharpening triangle, rectangle, circle, a kind of in tubular or mix.
Each of described pile body section diameter can be different, and the diameter of epimere pile body is greater than the diameter of hypomere pile body.
The Cast-in-place concrete pile body section of described pile body is provided with cross branch.
The external surface of described pile body is made and is adhered to a kind of of one deck sand wall, cement paste glued layer and rough and uneven in surface surface.
Described up and down joint bar is that round bar, cross section are a kind of in the iron plate of cross and I shape, by pre-buried or be welded on the link of pile body.
The present invention compared with prior art, owing to adopt more piece pile body and plural expansion base, according to different ground soil property and safe classes thereof, the difference of bearing capacity is removed the reasonable combination compatibility, and by evidence because being provided with of upper bed-plate produces good influence to the performance of lower bottom base bearing capacity, being provided with the performance of each section pile body frictional resistance of each base is favourable, make stake be in the state work down of economical rationality all the time, obviously improve the bearing capacity of single pile and the utilization rate of the strength of materials, reach the Expected Results of design easily, satisfy the needs of construction work better, no matter simultaneously applied widely is high level or low-rise building, safe class and ground soil property situation can both be combined into the immersed tube prefabricated multistage under-reamed pile that is complementary with it.Implement in addition to be beneficial to and to apply easily.
Description of drawings
Fig. 1 is the main TV structure schematic diagram of precast pile of the present invention.
Fig. 2 is that hypomere of the present invention is the embodiment of cast-in-situ steel concrete pile body.
Fig. 3 is the A-A sectional structure schematic diagram of Fig. 2.
Fig. 4 is that hypomere of the present invention is the embodiment of prefabricated tubulose pile body.
Fig. 5 is the structural representation of the embodiment of the invention four.
Among the figure: 1, Cast-in-place concrete base; 2, go up the Cast-in-place concrete base; 3, hypomere precast pile; 4, the precast prestressed pile body of epimere; 5, the following joint bar of hypomere precast pile; 6, the following joint bar of epimere precast pile; 7, the joint bar of cast-in-place pile body; 8, cross branch; 9, the last joint bar of hypomere precast pile; 10, bury joint bar in advance; 11, the cast-in-place pile body of hypomere; 12, hypomere tubulose precast pile.
The specific embodiment
Embodiments of the invention are described in detail in conjunction with the accompanying drawings, but protection scope of the present invention is not limit by embodiment.
Embodiment one
As shown in Figure 1 be the main TV structure schematic diagram of precast pile Cast-in-place concrete base of the present invention, be provided with the following joint bar 6 of epimere precast pile in the precast prestressed pile body 4 of epimere, be provided with the last joint bar 9 of hypomere precast pile in the hypomere precast pile 3 and bury joint bar 10 in advance, the last joint bar 9 of hypomere precast pile overlaps mutually with the following joint bar 6 of epimere precast pile, by last Cast-in-place concrete base 2 precast prestressed pile body 4 of epimere and 3 anchorings of hypomere precast pile are fused, the lower end of hypomere precast pile 3 is provided with Cast-in-place concrete base 1 again.The job practices of present embodiment can be constructed according to common process.
Embodiment two
As shown in Figure 2, the epimere pile body is the precast prestressed pile body 4 of epimere, the hypomere pile body is the cast-in-place pile body 11 of hypomere, the joint bar 7 of the cast-in-place pile body of the cast-in-place pile body 11 of hypomere be usually be provided with and with following joint bar 6 overlap joints of the pre-buried epimere precast pile in the precast prestressed pile body of epimere 4 lower ends.The cast-in-place pile body 11 of described hypomere is provided with to increasing the cross branch 8 of frictional resistance between pile body and the pan soil, and cross as shown in Figure 3 branch 8 can adopt YEJ800 type hydraulic pressure to prop up disc shaping machine to extrude crossly, and cast-in-situ steel concrete gets final product again; Perhaps for identical purpose makes the scraggly surface of external surface form of the cast-in-place pile body 11 of its hypomere with the soil compaction method, can also be provided with two-stage or multistage prefabricated or cast-in-place pile body as required in the upper end of the precast prestressed pile body 4 of epimere, other structure is with embodiment one.
Embodiment three
The following joint bar 6 of epimere precast pile for the precast prestressed pile body 4 of epimere shown in Figure 4 directly stretches in the hypomere tubulose precast pile 12, the following joint bar 5 of the hypomere precast pile that is provided with in the hypomere tubulose precast pile 12 passes cast-in-situ base 1 and hammers into hardpan, can also be provided with one-level, two-stage or multistage prefabricated or cast-in-place pile body as required in the upper end of the precast prestressed pile body 4 of epimere, other structure is with above-mentioned embodiment one.
Embodiment four
As shown in Figure 5 be the main TV structure schematic diagram of precast pile Cast-in-place concrete base of the present invention, be provided with the following joint bar 6 of epimere precast pile in the precast prestressed pile body 4 of epimere, be provided with the last joint bar 9 of hypomere precast pile and the following joint bar 5 of hypomere precast pile in the hypomere tubulose precast pile 12, the following joint bar 5 of hypomere precast pile passes cast-in-situ base 1 and hammers into hardpan, the last joint bar 9 of hypomere precast pile overlaps mutually with the following joint bar 6 of epimere precast pile, lap-joint by on Cast-in-place concrete base 2 precast prestressed pile body 4 of epimere and 12 anchorings of hypomere tubulose precast pile are fused, the lower end of hypomere tubulose precast pile 12 is provided with Cast-in-place concrete base 1.Can also be provided with one or more levels prefabricated or cast-in-place pile body in the upper end of the precast prestressed pile body 4 of epimere as required, in Cast-in-place concrete base 1 and last Cast-in-place concrete base 2, the radiation muscle can be set.The job practices of present embodiment can be constructed according to common process.
The shape of embodiment one to embodiment four described Cast-in-place concrete base 1 and last Cast-in-place concrete base 2 is not limit, its vertical section be up-small and down-big trapezoidal or sharpening triangle can, its bottom is a kind of in plane, convex surface and the concave surface.
Each section diameter of embodiment one to embodiment four described pile body can be the same or different, and the epimere pile body diameter is greater than the hypomere pile body diameter usually.
Embodiment one to embodiment four described various joint bars are round bar, and the cross section is a kind of in the cross and I shape iron plate.Sometimes for increasing the frictional resistance of pile body, when the cross section of pile body is sharpening triangle, rectangle pile body, sand can be in immersed tube, irritated, when immersed tube pulls up, the sand wall can be formed between pile body and the soil layer.
The cross section of embodiment one to embodiment four described each section pile body is sharpening triangle, rectangle, circle, a kind of in tubular or mix, and mixes being meant when epimere is triangle that hypomere then can be circle, and next section can also be for tubular again.
Embodiment one to embodiment four described each section pile body can be a kind of or mixing in precast prestressed concrete pile body, high-strength prestressed concrete pile body, no prestressed concrete pile body, steel pipe pile body, tubulose precast pile and the cast-in-place pile body, mix and be meant when epimere is the steel pipe pile body, hypomere can be the high-strength prestressed concrete pile body, and next section is cast-in-place pile body again; Or epimere is the concrete pile body, and hypomere is the steel pipe pile body; Or epimere is that tubulose precast pile hypomere is cast-in-place pile body or does not have the prestressed concrete pile body or prefabricated stress pile body.Be precast pile in order to reach the wherein uppermost pile body overwhelming majority of better effect, the pile body of hardpan part can adopt cast-in-place pile body.
Claims (10)
1, immersed tube prefabricated multistage under-reamed pile, form by pile body and the Cast-in-place concrete base that is positioned at hardpan, it is characterized in that described pile body forms by two sections at least, be provided with a Cast-in-place concrete base between the two at it, and the anchor connection of Cast-in-place concrete base become an integral body by its joint bar up and down separately.
2, immersed tube prefabricated multistage under-reamed pile according to claim 1 is characterized in that the center of described base is coaxial with the pile body center.
3, immersed tube prefabricated multistage under-reamed pile according to claim 1 and 2 is characterized in that being provided with in the described base radiation muscle.
4, immersed tube prefabricated multistage under-reamed pile according to claim 1 and 2, the vertical section that it is characterized in that described base are the big down little trapezoidal profile line of, and do not limit as for the concrete shape of base, and its bottom surface is the plane, a kind of in convex surface and the concave surface.
5, immersed tube prefabricated multistage under-reamed pile according to claim 1 is characterized in that each section of described pile body is a kind of or mixing in precast prestressed concrete pile body, high-strength prestressed concrete pile body, no prestressed concrete pile body, steel pipe pile body, tubulose precast pile and the cast-in-place pile body.
6, immersed tube prefabricated multistage under-reamed pile according to claim 1, the cross section that it is characterized in that described each section of pile body be sharpening triangle, rectangle, circle, a kind of in tubular or mix.
7, immersed tube prefabricated multistage under-reamed pile according to claim 1 is characterized in that each section diameter of described pile body can be different, and the diameter of epimere pile body is greater than the diameter of hypomere pile body.
8, immersed tube prefabricated multistage under-reamed pile according to claim 1 is characterized in that the Cast-in-place concrete pile body section of described pile body is provided with cross branch.
9, immersed tube prefabricated multistage under-reamed pile according to claim 1, the external surface that it is characterized in that described pile body is made and is adhered to a kind of of one deck sand wall, cement paste glued layer and rough and uneven in surface surface.
10, immersed tube prefabricated multistage under-reamed pile according to claim 1 is characterized in that described up and down joint bar is that round bar, cross section are a kind of in the iron plate of cross and I shape, by pre-buried or be welded on the link of pile body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100461605A CN100510275C (en) | 2006-03-24 | 2006-03-24 | Immersed tube prefabricated multistage under-reamed pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100461605A CN100510275C (en) | 2006-03-24 | 2006-03-24 | Immersed tube prefabricated multistage under-reamed pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1827925A true CN1827925A (en) | 2006-09-06 |
| CN100510275C CN100510275C (en) | 2009-07-08 |
Family
ID=36946467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100461605A Expired - Fee Related CN100510275C (en) | 2006-03-24 | 2006-03-24 | Immersed tube prefabricated multistage under-reamed pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100510275C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135156B (en) * | 2007-09-29 | 2011-12-14 | 童乐天 | Mechanical pile forming method for high-bearing two-stage bottom expanding prefabricated pile body |
| CN103669337A (en) * | 2013-11-22 | 2014-03-26 | 宁波鸿晨建设有限公司 | Head-expansion long spiral drilling pressure irrigation pile and construction method and construction device thereof |
-
2006
- 2006-03-24 CN CNB2006100461605A patent/CN100510275C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135156B (en) * | 2007-09-29 | 2011-12-14 | 童乐天 | Mechanical pile forming method for high-bearing two-stage bottom expanding prefabricated pile body |
| CN103669337A (en) * | 2013-11-22 | 2014-03-26 | 宁波鸿晨建设有限公司 | Head-expansion long spiral drilling pressure irrigation pile and construction method and construction device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100510275C (en) | 2009-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100510275C (en) | Immersed tube prefabricated multistage under-reamed pile | |
| CN200946269Y (en) | Sinking pipe perfusion bottom-expanding pile | |
| CN200955146Y (en) | Multi-stage sink-pipe bored concrete pile | |
| CN200946270Y (en) | Sinking pipe bottom-expanding pile | |
| CN200955147Y (en) | High-rise building sink-pipe bored concrete pile | |
| CN200949227Y (en) | Pipe sank prefabricated pedestal pile | |
| CN200978416Y (en) | Reinforced concrete bottom-enlarged prefabricated pile | |
| CN201074324Y (en) | High-rise building club-footed pile | |
| CN201089908Y (en) | Sink pipe prefabricated club-footed pile for high-rise building | |
| CN201087400Y (en) | High bearing ability immersed tube filling pedestal pile | |
| CN201137065Y (en) | Impact force resistant pipe caisson prefabricated club-footed pile for high-rise building | |
| CN201089903Y (en) | Sink pipe prefabricated club-footed pile against impulse force for high-rise building | |
| CN200958212Y (en) | Immersed-pipe bored concrete pile | |
| CN201074327Y (en) | Pipe sinking prefabricated pedestal pile suitable for high-rise buildings | |
| CN201074325Y (en) | Pedestal pile suitable for foundation construction of high-rise buildings | |
| CN201087412Y (en) | Immersed tube prefabricated pedestal pile | |
| CN201137095Y (en) | Pipe caisson prefabricated club-footed pile for high-rise building | |
| CN200955148Y (en) | Sink-pipe prefabricated club-footed pile suitable for high-rise building | |
| CN201121318Y (en) | Immersed tube pedestal pile | |
| CN200967959Y (en) | High-rise building club-footed pile | |
| CN201087346Y (en) | Anti-impact immersed tube prefabricated pedestal pile | |
| CN201121317Y (en) | Anti-impact pedestal pile for building foundation construction | |
| CN200955149Y (en) | Club-footed pile suitable high-rise building foundation construction | |
| CN201137071Y (en) | Impact force resistant pipe caisson prefabricated club-footed pile | |
| CN201137075Y (en) | Pipe caisson club-footed pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20140324 |