CN205857160U - A kind of prefabricated friction pile of new concrete - Google Patents
A kind of prefabricated friction pile of new concrete Download PDFInfo
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- CN205857160U CN205857160U CN201620821389.0U CN201620821389U CN205857160U CN 205857160 U CN205857160 U CN 205857160U CN 201620821389 U CN201620821389 U CN 201620821389U CN 205857160 U CN205857160 U CN 205857160U
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- pile
- injected hole
- aisle
- center
- friction pile
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Abstract
A kind of prefabricated friction pile of new concrete includes pile, is provided with injected hole on described pile surface, the separation structure that the vent surface at described injected hole is arranged；Being provided with charging aperture at described pile afterbody, charging aperture connects with the center-aisle being located in pile, and injected hole connects with center-aisle；Described center-aisle and described injected hole are each provided at arrangement of reinforcement gap.The utility model has the advantage of, this friction pile is tightly combined with periphery soil layer, improves the bearing capacity of stake.
Description
Technical field
This utility model belongs to pile foundation engineering field, is specifically related to a kind of concrete prefabricated friction pile.
Background technology
The features such as it is high that pile foundation has bearing capacity, and settling amount is little and speed is the most uniform, can bear vertical load, horizontal lotus
Load, uplift force, machine vibration and associated power effect, as the base form that universality is stronger, be widely used to ground, house
In the engineerings such as base, bridge, water conservancy.
Summary of the invention
This utility model is to provide a kind of prefabricated friction pile of new concrete, and this friction pile is tight with the combination of periphery soil layer
Close, improve the bearing capacity of stake.
Realization the technical scheme is that, a kind of prefabricated friction pile of new concrete includes pile, at described pile table
Face is provided with injected hole, the separation structure that the vent surface at described injected hole is arranged；
Being provided with charging aperture at described pile afterbody, charging aperture connects with the center-aisle being located in pile, injected hole with in
Between channel connection；
Described center-aisle and described injected hole are each provided at arrangement of reinforcement gap.
Further, separation structure is thin film.
Further, separation structure includes fixed plate and the trapezoidal pushing block being located in fixed plate, at described injected hole inwall
Being provided with chute, be connected with chute in trapezoidal pushing block is located at injected hole and by sliding bar, sliding bar can relative slide.
Being provided with spring in chute, spring contacts with sliding bar and sliding bar can be stoped to slide.
A kind of new concrete prefabricated friction pile pile sinking process includes that testing pile sinking regional soil bearing capacity sinks
Stake slip casting；
Described test pile sinking regional soil bearing capacity, uses flat board static load test to detect, and bearing capacity meets static pressed pile
Execution conditions；
Described pile sinking, uses friction pile press device press-in sinking region and is pre-stressed to specify position；
Described slip casting, the pump pressure starting to use during slip casting is low, and serosity injects from pile afterbody charging aperture, and passes through
Between passage reach injected hole, after serosity is full of friction pile center-aisle 40 percent, pump pressure relative to initial pressure increase by hundred
/ bis-ten to percent three ten, after serosity is full of friction pile center-aisle 60 percent, pump pressure is relative to initial pressure
Increasing by six ten ten to percent 5 percent, after serosity is full of friction pile center-aisle 80 percent, pump pressure is relative to just
Beginning pressure increases by nine ten ten to percent 8 percent, after serosity is full of friction pile center-aisle 90 percent, pump pressure pair
Increasing absolutely in initial pressure, after pump pressure increases to 80 percent relative to initial pressure, serosity promotes trapezoidal
Pushing block is along slide, and trapezoidal pushing block front end passes pile, penetrates in the soil layer of pile periphery, and serosity passes through trapezoidal pushing block simultaneously
Gap between edge and injected hole sprays pile and is wrapped in trapezoidal pushing block surface；
New concrete prefabricated friction pile pile sinking is realized through above step.
It is an advantage of the current invention that in engineer applied, between friction pile and soil layer, there is negative friction, pile foundation is produced
Certain harm.Intensive piling makes around to produce the biggest super interstitial hydraulic pressure in soil layer, and after pile sinking, surrounding soil consolidates again
Cause solum settlement and then produce negative friction.Novel friction stake substantially increases the coefficient of friction of a side and soil layer,
Decrease the usage quantity of friction pile in the case of driving depth is identical, thus slacken the impact of negative friction.
After high-pressure slip-casting, friction pile internal reservation hole is filled, and its comprcssive strength can meet design carrying
Load, and the dowel pin formed can strengthen the combination of friction pile and soil layer effectively, greatly increases the friction of friction pile and soil layer
Coefficient, reduces the contact area of required friction pile and soil layer in the case of longitudinal load is certain, i.e. reduces friction pile and enter
The degree of depth of underground layer or the consumption of friction pile, save the raw material producing friction pile.
The thin film that reserving hole and soil layer contact surface are arranged effectively prevents in pile driving process, foreign material enter hole, it is ensured that note
Slurry effectiveness, it is to avoid secondary empties increased quantities.
This prefabricated friction pile is the dowel pin formed after slip casting again of first driving piles, and this form can more preferably be combined with soil layer, it is to avoid
Dowel pin gos deep into soil layer and makes and be damaged.
Accompanying drawing explanation
Fig. 1 Novel friction stake internal structure schematic diagram.
Schematic diagram after Fig. 2 Novel friction stake slip casting.
Fig. 3 reserving hole structural representation.
Fig. 4 is preferred reinforcement structure schematic diagram.
Fig. 5 is separation structure preferred structure schematic diagram.
In figure, 1-injected hole, 2-arrangement of reinforcement, 3-erect muscle, 4-dowel pin, 5-pile, 6-pile top, 7-center-aisle,
The trapezoidal pushing block of 8-fixed plate, 9-, 10-chute, 11-sliding bar, 12-spring.
Detailed description of the invention
As shown in Figure 1,3, a kind of prefabricated friction pile of new concrete includes pile 5, is provided with slip casting on described pile 5 surface
Hole 1, the separation structure 4 that the vent surface at described injected hole 1 is arranged；
Being provided with charging aperture 6 at described pile 5 afterbody, charging aperture 6 connects with the center-aisle 7 being located in pile 5, injected hole
1 connects with center-aisle 7；Center-aisle 7 inner hollow, but outer wall can use steel material, and center-aisle 7 is together with arrangement of reinforcement 2
Become new concrete prefabricated friction pile bone and add structure；
Center-aisle 7 and described injected hole 1 are each provided at arrangement of reinforcement 2 gap, and the front end of arrangement of reinforcement is provided with perpendicular muscle 3, and arrangement of reinforcement 2 strengthens stake
The intensity of post, perpendicular muscle 3 strengthens the intensity of pile top, and preferred arrangement of reinforcement 2 is helical structure.
Excellent preferably separation structure 4 is thin film, for the length stub less than 2 meters, thin film can be used injected hole
1 blocks.
For length more than 2 meters, or under water operation time, use thin film closure injected hole 1, it is impossible to obtain closure effect
Really.
Preferably, in Fig. 5, separation structure 4 includes fixed plate 8 and the trapezoidal pushing block 9 being located in fixed plate 8, described
Injected hole 1 inwall is provided with chute 10, is connected with chute 10 in trapezoidal pushing block 9 is located at injected hole 1 and by sliding bar 11, sliding
Lever 11 can be slided by chute 10 relatively, it is preferred that being provided with spring 12 in chute 10, spring 12 contacts and energy with sliding bar 11
Sliding bar 11 is stoped to slide.After slip casting, it is internal that institute's injection slurry enters pile 5 by charging aperture 6, and is arrived by center-aisle 7
Reach injected hole 1, after arriving certain value along with grouting pressure, the pulling force of spring 12 can be overcome, make trapezoidal pushing block 9 sliding along chute 10
Dynamic, along with the slip of trapezoidal pushing block 9, the chute 10 slipped over can be filled up (making trapezoidal pushing block 9 to be displaced outwardly), energy by serosity
Preventing trapezoidal pushing block 9 because of the fluctuation of grouting pressure value simultaneously, and cause the retraction of trapezoidal pushing block 9, trapezoidal pushing block 9 is pushed out slip casting
Kong Hou, trapezoidal pushing block 9 front end is pushed in the soil layer of pile periphery, and trapezoidal pushing block 9 is carried out spacing by fixed plate 8, prevents ladder
Shape pushing block 9 continues to move to, and serosity is by the gap ejection pile between trapezoidal pushing block 9 edge and injected hole, and fraction slurries can wrap
It is rolled in trapezoidal pushing block 9 outer surface, outside pile, forms dowel pin 4.
A kind of new concrete prefabricated friction pile pile sinking process includes that testing pile sinking regional soil bearing capacity sinks
Stake slip casting；
Described test pile sinking regional soil bearing capacity, uses flat board static load test to detect, and bearing capacity meets static pressed pile
Execution conditions, foundation bearing capacity detection can be divided into natural foundation bearing capacity to detect and testing of bearing capacity of composite foundation, but detection side
Method principle is the most much the same.Flat board static load test is generally used to detect.Specific practice approximately as: use a certain size
Steel plate (needs have certain rigidity, so typically using plurality of steel plates according to from top to bottom from little greatly laminated structure),
It is placed on the foundation soil preparing detection, if detection of compound foundation, typically also needs to lay below steel plate certain thickness
Mattress layer, is being placed above a jack, sets up loading platform above jack, stacks counterweight, available cement above platform
Block, is also counterweight with pocket sand loading masonry, if bearing capacity is bigger, it is possible to use anchoring pile as counter-force.Then pass through
Jack multistage loadings mensuration settle situation accordingly, when instructing foundation soil settling amount to meet instability condition, and the lotus recorded
Load counterweight amount can calculate foundation bearing capacity divided by the area of steel plate；
Described pile sinking, uses friction pile press device press-in sinking region and is pre-stressed to specify position, piling order:
Piling order should determine according to the density that landform, soil property and stake are arranged.Owing to stake produces extruding, the stake being first pressed into often quilt to the soil body
The stake pushing of rear press-in and occurred level displacement, therefore should draft rational piling order.When driving piles by row, the propelling of piling
Direction should gradually change, in order to avoid being squeezed in one direction, causes soil extruding uneven.And for same campshed, must
The mode that interval can be used when wanting to jump pressure is carried out.During large area piling, gradually can advance to surrounding first from intermediate pressure；Also may be used
Use segmentation pressure, to reduce the extruding to stake.
The control of piling quality: the quality of piling will depending on the deviation after squeezing into whether within allowed band, pile penetration and
Whether pile sinking absolute altitude meets design and requires and depending on whether stake top, pile body broken；
Described slip casting, the pump pressure starting to use during slip casting is low, and serosity injects from pile afterbody charging aperture, and passes through
Between passage reach injected hole, after serosity is full of friction pile center-aisle 40 percent, pump pressure relative to initial pressure increase by hundred
/ bis-ten to percent three ten, after serosity is full of friction pile center-aisle 60 percent, pump pressure is relative to initial pressure
Increasing by six ten ten to percent 5 percent, after serosity is full of friction pile center-aisle 80 percent, pump pressure is relative to just
Beginning pressure increases by nine ten ten to percent 8 percent, after serosity is full of friction pile center-aisle 90 percent, pump pressure pair
Increasing absolutely in initial pressure, after pump pressure increases to 80 percent relative to initial pressure, serosity promotes trapezoidal
Pushing block is along slide, and trapezoidal pushing block front end passes pile, penetrates in the soil layer of pile periphery, and serosity passes through trapezoidal pushing block simultaneously
Gap between edge and injected hole sprays pile and is wrapped in trapezoidal pushing block surface；Grouting pressure slowly improves, and can make slurry
Liquid can be full of in pile, prevents from being formed negative pressuren zone in pile, thus weakens the intensity of pile self.
New concrete prefabricated friction pile pile sinking is realized through above step.
Operation principle: utilize high-pressure slip-casting (such as: water glass series of chemical grouting) mode, by serosity by described injected hole
Hole, inculcates to stake side and soil layer；Under high pressure effect, final thin film of breaking through penetrates into formation dowel pin 4 among the soil body, simultaneously
Pre-pouring grout hole is also filled.The present invention proposes a prefabricated friction pile of new concrete and can want in satisfied design bearing strength
Ask under premise, by increasing described stake and coefficient of friction contact between soil layer, reduce in the case of load is certain described stake and
Contact area between soil layer, reduces described stake and sinks to the degree of depth of soil layer, save the material preparing described stake.
Claims (4)
1. the prefabricated friction pile of new concrete, is characterized in that: described friction pile includes pile (5), at described pile (5) table
Face is provided with injected hole (1), the separation structure (4) that the vent surface at described injected hole (1) is arranged；
Being provided with charging aperture (6) at described pile (5) afterbody, charging aperture (6) connects with the center-aisle (7) being located in pile (5),
Injected hole (1) connects with center-aisle (7)；
Described center-aisle (7) and described injected hole (1) are each provided at arrangement of reinforcement gap.
A kind of prefabricated friction pile of new concrete the most according to claim 1, it is characterised in that: described separation structure (4)
For thin film.
A kind of prefabricated friction pile of new concrete the most according to claim 1, it is characterised in that: described separation structure (4)
Including fixed plate (8) and the trapezoidal pushing block (9) that is located in fixed plate (8), described injected hole (1) inwall is provided with chute
(10), being connected with chute (10) in trapezoidal pushing block (9) is located at injected hole (1) and by sliding bar (11), sliding bar (11) can phase
Chute (10) is slided.
A kind of prefabricated friction pile of new concrete the most according to claim 3, it is characterised in that: described chute sets in (10)
Having spring (12), spring (12) contacts with sliding bar (11) and sliding bar (11) can be stoped to slide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620821389.0U CN205857160U (en) | 2016-08-01 | 2016-08-01 | A kind of prefabricated friction pile of new concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620821389.0U CN205857160U (en) | 2016-08-01 | 2016-08-01 | A kind of prefabricated friction pile of new concrete |
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| Publication Number | Publication Date |
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| CN205857160U true CN205857160U (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620821389.0U Withdrawn - After Issue CN205857160U (en) | 2016-08-01 | 2016-08-01 | A kind of prefabricated friction pile of new concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087976A (en) * | 2016-08-01 | 2016-11-09 | 三峡大学 | A kind of prefabricated friction pile of new concrete and pile sinking process |
-
2016
- 2016-08-01 CN CN201620821389.0U patent/CN205857160U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087976A (en) * | 2016-08-01 | 2016-11-09 | 三峡大学 | A kind of prefabricated friction pile of new concrete and pile sinking process |
| CN106087976B (en) * | 2016-08-01 | 2018-01-05 | 三峡大学 | A kind of concrete prefabricated friction pile and pile sinking process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170104 Effective date of abandoning: 20180105 |
|
| AV01 | Patent right actively abandoned |