CN206800387U - A kind of new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top - Google Patents
A kind of new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top Download PDFInfo
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- CN206800387U CN206800387U CN201720653678.9U CN201720653678U CN206800387U CN 206800387 U CN206800387 U CN 206800387U CN 201720653678 U CN201720653678 U CN 201720653678U CN 206800387 U CN206800387 U CN 206800387U
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Abstract
The utility model discloses a kind of new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top, the pile top is located at prestressed concrete pipe pile bottom steel plate, the pile top is cross pile top, including upper and lower two layers of half hinge steel plates, upper hinge steel plate and lower jaw steel plate mutually stagger；The intermediate connections of the upper hinge steel plate and lower jaw steel plate are flexible connection.This new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top, which utilizes, turns piling method, make pile tube after penetrating argillic horizon and entering sandy soils, pile top is converted to the half-open shape of the mouth as one speaks by enclosed type, both clay had been prevented to enter pile tube inner chamber, reduce end resistance of the pile tube when penetrating sandy soils again, solve and push difficult after pile tube enters sandy soils or even pile breaking phenomenon occur.
Description
Technical field
Prestressed concrete pipe pile technical field is the utility model is related to, more particularly to a kind of new opening and closing shape of the mouth as one speaks prestressing force
Concrete tubular pile pile top.
Background technology
High-strength prestressed concrete（PHC）Pile tube is led in national skyscraper in recent years as a kind of new foundation pile
Domain is widely applied, and many-sided advantage is shown in engineering practice：Quick construction, conveniently, steady quality is reliable, good endurance, coagulation
Native intensity is high, and applicability is wide, and impact resistance is good, it is cost-effective the features such as, be widely used in Tall Building Foundation.
General during PHC tube pile constructions to require welding pile top, the purpose for setting pile top is to reduce broken pile rate, increases pile tube
The ability of soil layer is penetrated, the effect of pile top and function are mainly to solve the problems, such as the orientation and stability in construction, because
Have no idea to ensure the perpendicularity of pile driving construction without using pile top, and then be also impossible to ensure stake position.Pile top can also balance foundation pile
Bury the stress at end, makes stress is relatively uniform to reach pile tube, so as to ensure the stability of pile tube.
Pile top is divided into closed type and open-type, wherein closed type pile top calculated viscosity soil layer, and closed type pile top is except above
Two kinds of effects are outer, and also back cover is acted on, if because when not having back cover, clay can be squeezed into hole of post, and pile tube is formed
A kind of expansion stresses, with the increase of embedded depth, this expansion stresses are increasing so that tube wall concrete bear it is huge
Tension, it is possible to cause pile tube to destroy.Particularly swelled ground stratum, it should more prevent swelled ground from entering in hole of post.But
It is that closed type pile top can increase end resistance, is difficult when soil layer frictional force is larger, therefore using the pile tube of closed type pile top
Penetrate sandy soil stratum.And after sand enters in hole of post, to the expansion stresses very little of pile tube formation, therefore sandy soil stratum uses mostly
Open-type pile top, both solved the problems, such as orientation and stability in tube pile construction, and do not increased end resistance.
During practice of construction, formation is that top is argillic horizon mostly, and bottom is sandy soils, and tall building foundation is held
Power layer is mostly strongly weathered sand-rock, and PHC pile tubes have to penetrate through argillic horizon and sandy soils get to soil supporting layer.According to remaining silent
Type pile top, then because end resistance and pile lining frictional force are larger, PHC pile tubes are difficult to penetrate sandy soil stratum, easily cause broken pile.If
Using open-type pile top, then top clay can be squeezed into hole of post, form expansion stresses to pile tube, cause pile tube to destroy.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of new opening and closing shape of the mouth as one speaks prestressed concrete
Native pile tube pile top, solve and push difficult after pile tube enters sandy soils or even pile breaking phenomenon occur.
The technical solution of the utility model is：A kind of new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top, the pile top
Located at prestressed concrete pipe pile bottom steel plate, the pile top is cross pile top, including upper and lower two layers of half hinge steel plates, upper hinge
Steel plate and lower jaw steel plate mutually stagger；The intermediate connections of the upper hinge steel plate and lower jaw steel plate are flexible connection.
Further, the intermediate connections of the upper hinge steel plate and lower jaw steel plate are hinged by moveable hinge.
Further, the upper hinge steel plate and prestressed concrete pipe pile bottom steel plate are welded, lower jaw steel plate with it is pre-
Prestressed concrete pile tube bottom steel plate is not welded.
Further, the lower jaw steel plate at the intermediate gaps of prestressed concrete pipe pile bottom steel plate with being provided with filling
Thing.
Further, the filler includes cystosepiment and crisp plank.
Further, the foundation length of the prestressed concrete pipe pile is more than clay layer thickness and is less than 15m.
Further, the new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top is applied to internal diameter not less than 200mm's
Prestressed concrete pipe pile.
The beneficial effects of the utility model are：This new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top, which utilizes, turns stake side
Method, making pile tube, pile top is converted to the half-open shape of the mouth as one speaks by enclosed type, both prevents clay to enter after penetrating argillic horizon and entering sandy soils
Pile tube inner chamber, reduce end resistance of the pile tube when penetrating sandy soils again, solve after pile tube enters sandy soils and push difficulty
Even there is pile breaking phenomenon.
Brief description of the drawings
Fig. 1 is the plan of this new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top.
Fig. 2 is the sectional drawing of this new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top
Reference：Upper hinge steel plate 1, lower jaw steel plate 2, moveable hinge 3, filler 4, prestressed concrete pipe pile 5.
Embodiment
Implementation structure of the present utility model is described below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, this new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top, pile top are located at prestressed concrete
The native bottom steel plate of pile tube 5, pile top are cross pile top, including upper and lower two layers of half hinge steel plates, upper hinge steel plate 1 and lower jaw steel plate
2 mutually stagger；The intermediate connections of upper hinge steel plate 1 and lower jaw steel plate 2 are flexible connection.
Preferably, the intermediate connections of upper hinge steel plate 1 and lower jaw steel plate 2 are be hinged by moveable hinge 3.
Preferably, upper hinge steel plate 1 welds with the bottom steel plate of prestressed concrete pipe pile 5, lower jaw steel plate 2 and prestressing force
The bottom steel plate of concrete tubular pile 5 is not welded.
Preferably, lower jaw steel plate 2 at the intermediate gaps of the bottom steel plate of prestressed concrete pipe pile 5 with being provided with filler 4.
Preferably, filler 4 is cystosepiment or crisp plank.
For convenience, prestressed concrete pipe pile 5 is hereafter abbreviated as pile tube.
Use step：When starting static pressure construction, hinge steel plate and lower jaw steel plate mutually stagger in pile top, close pile tube
Mouthful, when the pile tube is passed through argillic horizon, effectively prevent clay from entering pile tube inner chamber.Once pile tube, which penetrates argillic horizon, enters sandy soils,
And pressure increases suddenly, when pile tube pushes difficulty, stopping pushes pile tube, and then 90 ° of pile tube of rotation twisting, makes pile top upper half hinge
Steel plate overlaps with lower half hinge steel plate, extrudes the cystosepiment behind lower half hinge steel plate or crisp plank, is further continued for pushing.Cystosepiment
Or crisp plank, after by lower pressure breaking, pile top is changed into the half-open shape of the mouth as one speaks, sand is pressed into pile tube inner chamber, and end resistance is reduced, and is protected
Card pile tube, which pushes, penetrates sandy soils, into supporting course.
Engineering case arranges：Certain institute's research and teaching building engineering, its basis use the concrete high-strength Prestressed Pipe Pile PHC- of φ 400
AB400（95）- α, concrete strength of pile grade are C80, and quantity is 116, and pile sinking mode is static pressure type, and pile tube is with severely-weathered
Sand layers are supporting course, it is desirable to which vertical bearing capacity of single pile characteristic value Ra is 2000KN.Basic place geological condition is：Below ground
0m to -4m is argillic horizon, and -4m to -10m is farinose argillic horizon, and -10m to -15m is fine sand layer, and -15m to -21m is medium coarse sand
Layer, is below intense weathering soft rock layer.When pipe pile static-pressure is constructed, preceding 50 root canal pile is reached using cross type pile toe of remaining silent, piling depth
12m or so, there is pressure of sinking pile and increase suddenly, pile tube pushes difficult phenomenon.After continuing the construction of intensified pressure static pressure, wherein having 7
There is anomaly, bottom pile tube the sound of sth. throbbing or bursting sound and pile press machine pressure gauge numerical value generation bust in root canal pile.Through detecting afterwards, this 7 pipes
Stake is broken pile, has had a strong impact on construction speed, has considerably increased construction cost.56 root canal piles use the new opening and closing shape of the mouth as one speaks ten instead afterwards
After shaped pile toe, when pushing difficulty after pile tube enters sandy soils, stop piling, then rotate 90 ° of pile tube, cross type pile toe turns
After changing half-open shape of the mouth as one speaks pile top into, static pressure pipe pile is further continued for, the safe static pressure of last pile tube is to supporting course, then does not occur broken pile and show
As.
Summarize：1. the new opening and closing shape of the mouth as one speaks cross type pile toe using piling method is turned, makes pile tube enter sand penetrating argillic horizon
After soil layer, pile top is converted to the half-open shape of the mouth as one speaks by enclosed type, had so both prevented clay to enter pile tube inner chamber, and had reduced pile tube again and exist
End resistance during sandy soils is penetrated, is solved and is pushed difficult after pile tube enters sandy soils or even pile breaking phenomenon occur.
2. because when turning stake, stake Thursday wall can produce friction with clay, form larger twisting resistance.If pile tube is connect
Turn stake after stake again, intermediate connections weld for steel plate, and other positions are more weak with respect to pile tube, turn twisting resistance caused by stake and very may be used
It will can be twisted off at pile extension.It is therefore desirable to before turning stake, pile tube is without pile extension.So require that the bottom pile length of foundation pile must
Must be more than thickness of clay soil, and can not be long, twisting difficulty too big to prevent stake Thursday wall friction power, it is proposed that stake at the bottom of when turning stake is long
Spend to be advisable no more than 15m.
3. because after stake is turned, pile top is only changed into the half-open shape of the mouth as one speaks, easily formed " soil plug " if pile tube internal diameter is smaller, during piling
Effect, sand block pile tube mouth, do not have and reduce end resistance effect, it is therefore proposed that the new opening and closing shape of the mouth as one speaks prestressed concrete
Pile tube pile top is applied to the pile tube that internal diameter is not less than 200mm.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any change expected without creative work or simple replacement, should all cover in protection model of the present utility model
Within enclosing.
Claims (7)
1. a kind of new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top, the pile top are located at prestressed concrete pipe pile（5）Bottom
Layer steel plate, it is characterised in that：The pile top is cross pile top, including upper and lower two layers of half hinge steel plates, upper hinge steel plate（1）With under
Hinge steel plate（2）Mutually stagger；The upper hinge steel plate（1）With lower jaw steel plate（2）Intermediate connections for be flexibly connected.
2. new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top according to claim 1, it is characterised in that：The upper conjunction
Page steel plate（1）With lower jaw steel plate（2）Intermediate connections pass through moveable hinge（3）It is be hinged.
3. new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top according to claim 1 or 2, it is characterised in that：It is described
Upper hinge steel plate（1）With prestressed concrete pipe pile（5）Bottom steel plate is welded, lower jaw steel plate（2）With prestressed concrete pipe
Stake（5）Bottom steel plate is not welded.
4. new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top according to claim 3, it is characterised in that：The lower conjunction
Page steel plate（2）With prestressed concrete pipe pile（5）Filler is provided with the intermediate gaps of bottom steel plate（4）.
5. new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top according to claim 4, it is characterised in that：The filling
Thing（4）Including cystosepiment and crisp plank.
6. new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top according to claim 1, it is characterised in that：It is described it is pre- should
Power concrete tubular pile（5）Foundation length be more than clay layer thickness and be less than 15m.
7. new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top according to claim 6, it is characterised in that：It is described new
It is opened and closed shape of the mouth as one speaks prestressed concrete pipe pile pile top and is applied to the prestressed concrete pipe pile that internal diameter is not less than 200mm（5）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720653678.9U CN206800387U (en) | 2017-06-07 | 2017-06-07 | A kind of new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720653678.9U CN206800387U (en) | 2017-06-07 | 2017-06-07 | A kind of new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top |
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| Publication Number | Publication Date |
|---|---|
| CN206800387U true CN206800387U (en) | 2017-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720653678.9U Expired - Fee Related CN206800387U (en) | 2017-06-07 | 2017-06-07 | A kind of new opening and closing shape of the mouth as one speaks prestressed concrete pipe pile pile top |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643253A (en) * | 2018-08-09 | 2018-10-12 | 山东建勘集团有限公司 | A kind of static pressure pipe pile end resistance test device and test method |
-
2017
- 2017-06-07 CN CN201720653678.9U patent/CN206800387U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643253A (en) * | 2018-08-09 | 2018-10-12 | 山东建勘集团有限公司 | A kind of static pressure pipe pile end resistance test device and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20171226 Termination date: 20180607 |