CN208039240U - A kind of built pile - Google Patents
A kind of built pile Download PDFInfo
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- CN208039240U CN208039240U CN201820329660.8U CN201820329660U CN208039240U CN 208039240 U CN208039240 U CN 208039240U CN 201820329660 U CN201820329660 U CN 201820329660U CN 208039240 U CN208039240 U CN 208039240U
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a kind of built piles, the built pile includes prefabricated stake center and the Seed harvest that is wrapped in outside the prefabricated stake center, prefabricated stake center is formed by connecting by several prefabricated pile segmentations and the stake end of the prefabricated stake center, stake top and segmentation junction are both provided with rigid connection plate, and there is prefabricated pile big section end and the stake area of section of small bore end and prefabricated pile to reduce from big section end to the gradual change of small bore end along axis.Combination pilework disclosed by the utility model is conducive to prefabricated pile and forms entirety with Seed harvest tight bond and prevent the two contact surface from sliding, additionally it is possible to expand effective pile diameter, bearing capacity of single pile substantially increases relative to common prefabricated pile；Furthermore it is possible to pass through experiment estimation bearing capacity of single pile by simply marking, simply, conveniently, result of calculation is reliable for calculating process.
Description
Technical field
The utility model is related to the technical fields of civil engineering, more particularly, are related in building, traffic, municipal field
A kind of built pile.
Background technology
The mechanical execution method that pile foundation uses at present is broadly divided into two kinds：Mechanical hole perfusion post and hammering or static-pressure precast
Stake.Rotary digging bored concrete pile is one of most common pile-type in mechanical hole perfusion post, and construction efficiency is high, and manual security's property is good, so
And disadvantage is also apparent from：Bearing course at pile end has uncertainty, such as end-bearing pile in middle weathering and severely-weathered alternating layers, stake end first
Supporting course is often difficult to meet design requirement；Followed by use mud off pile bottom sediment thickness not easy to control, pile quality is not
It is easy to control, easily there is necking down, folder mud, isolation etc.；Be finally the larger stake of bearing capacity of single pile detection difficulty it is larger.
Prefabricated pile is controllable with pile quality, hammering or static pressure construction efficiency are higher, penetration power is relatively strong and can make stake
End is located at the advantages of harder supporting course, the disadvantage is that hammering construction noise and vibration is big, soil compaction is apparent, easily to surrounding building and
Underground utilities have an adverse effect, and destructiveness of the hammer-impact construction to soft rock, compared with soft rock is larger in addition, easily occurs bottom bearing after work
The problem of reduction, reliability reduce.Also, static pressure construction stake end is difficult to reach the harder supporting course of design requirement, can also produce
Raw soil compaction effect.When having on supporting course compared with hard stratum, hammering or static pressure construction are difficult to that prefabricated pile is made to reach across these stratum
To design holding force rock stratum, problem above affects the application of prefabricated pile to a certain extent.
The construction technology of comprehensive bored concrete pile and prefabricated pile takes its length to two kinds of pile-type, keeps away that its is short, using first drilling replant into
Prefabricated pile forms the built pile of prefabricated pile outer wrapping Seed harvest, has the following advantages：1) bearing course at pile end is controllable, can arrive
Up to the supporting course of design requirement；2) hidden danger of quality small to the destruction of weak rock, that the reduction later stage brings by rock softening；3) it adopts
With first slurry injection technique, vertical bearing capacity of single pile can be improved in the filling to rock fracture and soil around pile hole；4) pile quality has guarantor
Barrier, substantially reduces construction quality hidden danger.
Patent document (application number 91103285.1) proposes a kind of process for sinking, includes the following steps：Setting-out fixed pile →
Drilling machine drills → measures hole depth, aperture and bottom hole loosened soil sediment → mud off → implantation prefabricated pile in place, and pile top is marked up to design
It is high → to pull out pile follower pipe, backfill pile follower endoporus loosened soil.It is low Squeezing Soil Pile that this technique, which improves Squeezing Soil Pile, reduces pile sinking and is built to neighbouring
Object, structures harmful effect are built, solves the difficulty of construction passed through under the specified conditions such as hard folder soil layer.
Patent document (application number 201610404195.5) proposes a plant piling method, includes the following steps：Using can enter
The drillings such as churning driven, abrasion drill, the impact drill of rock pass through various soil layers to enter hard rock-soil layer, and mud off is used in drilling,
Do not have to mud off when dry pore-forming, forms stake holes；After the completion of drilling, prefabricated pile or Section-steel Piles or steel pipe are inserted in the hole；Using
Grouting process replaces mud with cement thixotropic slurry or cement mortar, and when dry pore-forming injects cement thixotropic slurry directly in hole；?
The top of prefabricated pile or Section-steel Piles applies pressure or hitting power.The method may pass through various soil layers and hard, and depth of pore forming is big.
However the prior art has the following disadvantages：1) prefabricated pile being inserted into individually plays a role, and it is excellent not play built pile
Entirety cannot be formed between gesture or prefabricated pile and cement mortar Seed harvest very well to play a role jointly, may be occurred under larger load
Sliding rupture occurs between prefabricated pile and cement mortar Seed harvest in built pile；2) built pile is as a kind of new pile-type, existing single pile
Bearing capacity computation method is not necessarily applicable in, and needs a kind of simple, effective bearing capacity computation method in use.
Utility model content
In order to solve the problems in the existing technology, the purpose of this utility model is to provide a kind of built pile.
The utility model provides a kind of built pile, and the built pile includes prefabricated stake center and is wrapped in the prefabricated stake center
Outer Seed harvest, the prefabricated stake center is formed by connecting by several prefabricated pile segmentations and the stake end of the prefabricated stake center, stake top
And segmentation junction is both provided with rigid connection plate, wherein the prefabricated pile has big section end and small bore end and prefabricated
The stake area of section of stake reduces along axis from big section end to the gradual change of small bore end.
According to one embodiment of the utility model built pile, the built pile by top non-expansion body section and lower part expansion
Body section forms, wherein the long half of stake of the length for expanding body section not less than 2m and no more than built pile, the expansion body section
1~2 times of a diameter of non-diameter for expanding body section.
According to one embodiment of the utility model built pile, the prefabricated pile with big section end upward and small bore end
Mode directed downwardly carries out segmentation connection, and prefabricated pile is connect by welding manner with rigid connection plate.
According to one embodiment of the utility model built pile, the prefabricated pile is concrete precast pile, metallic is prefabricated
Stake or synthetic resin prefabricated pile, a length of 2~100m of stake of the prefabricated pile.
According to one embodiment of the utility model built pile, the prefabricated pile be solid pile or hollow stake, it is described solid
The stake cross sectional shape of stake is round, rectangular, cross or quincunx, the hollow sectional shape of the hollow stake for it is round, rectangular,
Cross is quincunx.
According to one embodiment of the utility model built pile, 0.01≤γ of stake area of section fade rate of the prefabricated pile
=(D2-D1)/L0≤ 0.2, wherein L0Stake for single-unit prefabricated pile is long, D2For the outer diameter or the length of side at big section end, D1For small bore
The outer diameter or the length of side at end.
According to one embodiment of the utility model built pile, the area of the rigid connection plate is pre- more than segmentation junction
The stake area of section of stake processed, the rigid connection plate are steel plate, alloy sheets or synthetic resin board, and the Seed harvest is by slip casting material
It is formed after material hardening, the injecting paste material is cement mortar or chemical grout.
Compared with prior art, combination pilework disclosed by the utility model is conducive to prefabricated stake center and is closely glued with Seed harvest
Knot forms entirety and prevents the two contact surface sliding, additionally it is possible to expand effective pile diameter, bearing capacity of single pile is relative to common prefabricated pile
Substantially increase；Furthermore it is possible to pass through experiment estimation bearing capacity of single pile by simply marking, calculating process is simple, conveniently, result of calculation
Reliably.
Description of the drawings
Fig. 1 shows the structural schematic diagram of the built pile according to the utility model exemplary embodiment.
Reference sign：
1- rigid connections plate, 2- Seed harvests, 3- prefabricated piles, the non-expansion body sections of 4-, 5- expand body section.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature of this disclosure unless specifically stated can or replacing with similar purpose equivalent by other
It is replaced for feature.That is, unless specifically stated, each feature be an example in a series of equivalent or similar characteristics and
?.
The built pile of the utility model is specifically described below.
Fig. 1 shows the structural schematic diagram of the built pile according to the utility model exemplary embodiment.
As shown in Figure 1, exemplary embodiment according to the present utility model, the built pile includes prefabricated stake center and is wrapped in
Seed harvest 2 outside prefabricated stake center, prefabricated stake center is formed by connecting by several segmentations of prefabricated pile 3 and the stake end of prefabricated stake center 3, stake
Top and segmentation junction are both provided with rigid connection plate 1, wherein prefabricated pile 3 has big section end and small bore end and prefabricated
The stake area of section of stake 3 reduces along axis from big section end to the gradual change of small bore end.
Connection type of the utility model simultaneously between the structure and prefabricated pile of prefabricated pile in prefabricated stake center is changed
Into.On the one hand the prefabricated pile reduced by using cross-sectional area gradual change connects to form prefabricated stake center, enables to built pile
Bearing capacity effectively improves.
Preferably, prefabricated pile 3 carries out segmentation connection, this cloth upward and in a manner of small bore end is directed downwardly by big section end
It sets form and is conducive to the load of precast pile and transmitted to Seed harvest, bearing capacity can be improved.Also, prefabricated pile 3 passes through welding side
Formula is connect with rigid connection plate 1.
Exemplary embodiment according to the present utility model, prefabricated pile 3 can be concrete precast pile, metallic prefabricated pile or
Synthetic resin prefabricated pile, a length of 2~100m of stake of prefabricated pile.Prefabricated pile is preferably solid pile or hollow stake, the stake of solid pile
Cross sectional shape include but not limited to be round, rectangular, cross or quincunx, the hollow sectional shape of hollow stake includes but unlimited
In round, rectangular, cross or quincunx.
Wherein, 0.01≤γ of stake area of section fade rate=(D of prefabricated pile2-D1)/L0≤ 0.2, wherein L0It is pre- for single-unit
The stake of stake processed is long, D2For the outer diameter or the length of side at big section end, D1For the outer diameter or the length of side at small bore end.The bigger fade rate γ the more sharp
Bonding between prefabricated stake center and Seed harvest improves the two globality, while also can increase construction because increasing prefabricated pile joint number
Duration.
On the other hand, the utility model connects contiguous prefabricated stake by using rigid connector, be conducive to prefabricated stake center with
Seed harvest is combined into entirety, and shared load while both is effectively prevented from contact surface and slides, and produces notable
Better than the technique effect of built pile in the prior art.Prefabricated stake center is mainly the isometrical structure type of overall length in built pile at present,
Widened rigid connection plate is not provided between pile section.This structure is vertical suffered by prefabricated stake center under stake top vertical uniform load q
Power is transferred to Seed harvest by frictional force.When frictional force deficiency between the two, then easily occur viscous between prefabricated stake center and Seed harvest
Destruction is connect, this is most commonly seen failure mode in current engineer application.The ideal failure mode of built pile is Seed harvest
The sliding rupture between soil layer.If first being slid between Seed harvest and prefabricated stake center, the high-mechanic of built pile is not given full play to
Power advantage.It is slid between prefabricated stake center and Seed harvest in order to prevent, driving pre-fabricated pile is calculated as the structure of section gradual change by the utility model
Form, vertical load suffered by prefabricated stake center both are delivered on contact surface and are transferred to calculus by normal pressure and tangential friction force
Body, this aspect greatly reduce the frictional force of contact surface, while the normal pressure for acting on contact surface can improve between the two
Cohesive force for preventing contact surface sliding rupture advantageous, while when rigid bond plate is arranged between combination stake top and pile section, then being made
It is directly to reach Seed harvest by the plate that is rigidly connected that vertical load for stake top, which has major part, reduces prefabricated stake center and knot
The transmission of frictional force between stone body, the globality both advantageously ensured that, and widened rigid connection plate can with reinforced action
The compression strength of Seed harvest can be improved.This combination pilework in test high capacity, safety and good economy performance, it is significantly excellent
In traditional combination pilework.
Wherein, be rigidly connected plate area should be greater than segmentation junction prefabricated pile stake area of section, can be transferred with whole stake
Bottom hole is advisable.Preferably, which can be steel plate, alloy sheets, synthetic resin board etc..
The Seed harvest 2 of the built pile is formed after being hardened by injecting paste material, can be wrapped in the appearance of prefabricated stake center
On face, wherein injecting paste material can be cement mortar, polyurethane liquid etc..
Preferred embodiment according to the present utility model, built pile is by the non-expansion body section 4 on top and 5 groups of the expansion body section of lower part
At, wherein expand the long half of stake of the length of body section 5 not less than 2m and no more than built pile, and expands a diameter of non-of body section 5
Expand the diameter of body section 4 1~2 times.Body section is expanded in setting can significantly improve bearing capacity of pile tip, and single pile bearing further can be improved
Power, this is especially suitable when designed bearing capacity of single pile is higher
In the built pile for preparing above structure, preferably by following steps.
Step 1：
Non- reaming section is formed in the drilling of pre- fixed pile or borehole, a small amount of injecting paste material is injected into hole.
This step is drill process, can be used for carrying out the prefabricated stake center being subsequently inputted by injecting a small amount of injecting paste material
It pre-fixes.
In order to form the reaming section of built pile, in bottom hole when the construction method can further include drilling or borehole
Above predetermined depth carries out the step of reaming forms reaming section.
Preferably, hole depth is 3~100m, and aperture is 0.2~1.6m；The aperture of reaming section is the 1 of the aperture of non-reaming section
~2 times, and aperture should be greater than the area of rigid connection plate.
Step 2：
Prefabricated pile segmentation is connected to designing pile length and in stake end, stake top and segmentation junction setting rigid connection plate, system
At prefabricated stake center.
Wherein, it takes big section end upward when prefabricated pile segmentation connection and small bore end mode directed downwardly connects, and is excellent
Prefabricated pile is connect by selection of land by way of being welded to connect with rigid connection plate.
Step 3：
Prefabricated stake center is transferred to bottom hole predetermined depth and fixes prefabricated stake center centering, supplement injecting paste material to aperture,
It stands maintenance and reaches design strength to hardening, obtain the built pile of the utility model.
With reference to specific embodiment, the utility model is described in further detail.
Embodiment：
As shown in Figure 1, a length of 12m of the stake of the built pile expands body wherein non-expansion body segment length is 10m and a diameter of 0.8m
Segment length is 2m and a diameter of 1.2m.The prefabricated pile used often saves a length of 6m of stake of prefabricated pile, greatly for PHC pile piles (hollow pile)
The outer diameter at section end be 600mm, small bore compared with outer diameter be 400mm, wall thickness 125mm.
The construction of built pile includes the following steps：
In the drilling of pre- fixed pile or borehole, hole depth 12m, reaming formation reaming section, hole in the above 2m depth bounds of bottom hole
The interior a small amount of M30 cement mortars of injection；
By it is every section 6m prefabricated pile segmentation be connected to 12m predetermined stake it is long (2 prefabricated piles), stake end, stake top and
It is segmented junction and steel plate is set, connected by welding manner between steel plate and prefabricated pile, form prefabricated stake center, wherein steel plate is thick
3cm and plate diameter are 700mm；
Prefabricated stake center is transferred to bottom hole, prefabricated stake center centering is fixed, supplement M30 cement grouts to aperture stand and support
Shield to slurries hardening reaches design strength, obtains built pile.
Prefabricated pile can not be made to be set across compared with hard formation arrival in conclusion the utility model can solve hammering or static pressure construction
Meter bearing course at pile end and supporting course scar easily lead to a problems such as end slides, the prefabricated pile in built pile and calculus in the presence of inclination
Physical efficiency plays a role jointly as a whole, and bearing capacity of single pile is high.
The utility model is not limited to specific implementation mode above-mentioned.The utility model expands to any in this specification
The new feature of middle disclosure or any new combination, and disclose any new method or process the step of or any new group
It closes.
Claims (7)
1. a kind of built pile, which is characterized in that the built pile includes prefabricated stake center and the knot that is wrapped in outside the prefabricated stake center
Shi Ti, the prefabricated stake center is formed by connecting by several prefabricated pile segmentations and stake end, stake top and the segmentation of the prefabricated stake center
Junction is both provided with rigid connection plate, wherein the prefabricated pile has the stake at big section end and small bore end and prefabricated pile
Area of section reduces along axis from big section end to the gradual change of small bore end.
2. built pile according to claim 1, which is characterized in that non-expansion body section and lower part of the built pile by top
Expand body section composition, wherein the long half of stake of the length for expanding body section not less than 2m and no more than built pile, the expansion body section
A diameter of non-expand body section 1~2 times of diameter.
3. built pile according to claim 1, which is characterized in that the prefabricated pile with big section end upward and small bore
Mode directed downwardly is held to carry out segmentation connection, prefabricated pile is connect by welding manner with rigid connection plate.
4. built pile according to claim 1, which is characterized in that the prefabricated pile is concrete precast pile, metallic is pre-
Stake processed or synthetic resin prefabricated pile, a length of 2~100m of stake of the prefabricated pile.
5. built pile according to claim 1, which is characterized in that the prefabricated pile is solid pile or hollow stake, the reality
The stake cross sectional shape of heart stake is round, rectangular, cross or quincunx, and the hollow sectional shape of the hollow stake is round, side
Shape, cross or quincunx.
6. built pile according to claim 1, which is characterized in that the stake area of section fade rate 0.01 of the prefabricated pile≤
γ=(D2-D1)/L0≤ 0.2, wherein L0Stake for single-unit prefabricated pile is long, D2For the outer diameter or the length of side at big section end, D1It is small section
The outer diameter or the length of side at face end.
7. built pile according to claim 1, which is characterized in that the area of the rigid connection plate is more than segmentation junction
The stake area of section of prefabricated pile, the rigid connection plate are steel plate, alloy sheets or synthetic resin board, and the Seed harvest is by slip casting
It is formed after material hardening, the injecting paste material is cement mortar or polyurethane liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820329660.8U CN208039240U (en) | 2018-03-12 | 2018-03-12 | A kind of built pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820329660.8U CN208039240U (en) | 2018-03-12 | 2018-03-12 | A kind of built pile |
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| Publication Number | Publication Date |
|---|---|
| CN208039240U true CN208039240U (en) | 2018-11-02 |
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ID=63951155
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| CN201820329660.8U Expired - Fee Related CN208039240U (en) | 2018-03-12 | 2018-03-12 | A kind of built pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221972A (en) * | 2018-03-12 | 2018-06-29 | 四川省建筑科学研究院 | A kind of built pile and its construction method and vertical bearing capacity of single pile computational methods |
-
2018
- 2018-03-12 CN CN201820329660.8U patent/CN208039240U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221972A (en) * | 2018-03-12 | 2018-06-29 | 四川省建筑科学研究院 | A kind of built pile and its construction method and vertical bearing capacity of single pile computational methods |
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: A section of Chengdu city Jinniu District 610000 North Road No. 55 in Sichuan Province Patentee after: SICHUAN INSTITUTE OF BUILDING RESEARCH Co.,Ltd. Address before: A section of Chengdu city Jinniu District 610000 North Road No. 55 in Sichuan Province Patentee before: SICHUAN INSITITUTE OF BUILDING RESEARCH |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |