CN201972146U - Prefabricated concrete pipe pile - Google Patents
Prefabricated concrete pipe pile Download PDFInfo
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- CN201972146U CN201972146U CN2011200404702U CN201120040470U CN201972146U CN 201972146 U CN201972146 U CN 201972146U CN 2011200404702 U CN2011200404702 U CN 2011200404702U CN 201120040470 U CN201120040470 U CN 201120040470U CN 201972146 U CN201972146 U CN 201972146U
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- pile
- prefabricated concrete
- pile body
- concrete pipe
- pile tube
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Abstract
The utility model discloses a prefabricated concrete pipe pile which at least comprises a pile body; the pile body is a hollow rotary body; and the outer surface of the pile body is an increased friction surface. The increased friction surface comprises concentric convex patterns or threads or a plurality of convex parts or ripple parts on the outer surface of the pile body. In the prefabricated concrete pipe pile, due to the structural design, the structural improvement on the outer surface is the increased friction surface, so that the friction coefficient of a side surface is improved, the pile side friction force of the prefabricated concrete pipe pile is increased, so that the prefabricated concrete pipe pile is particularly applicable to the construction environments of stratum structures which cannot meet the design depth requirement of a pile foundation. In the construction environments of the stratum structures which cannot meet the design depth requirement of the pile foundation, because the prefabricated concrete pipe pile is adopted, the pile side friction force which meets the design requirement can be obtained even if the depth of the pile foundation is not enough while the pile foundation is ensured to enter a bearing layer, so that the design requirement of the pile foundation is met.
Description
Technical field
The utility model relates to the pile foundation technology field, relates in particular to a kind of prefabricated concrete pile tube that is used as the building foundation.
Background technology
For the construction of a building high building, its structural safety depends on basic engineering to a great extent, and basic engineering then is according to the geological mapping parameter, carries out according to design specifications.Build various buildings particularly high-rise building, heavy factory building and when having the structure of specific (special) requirements in the bad area of soil property, pile foundation technology has become a kind of base form of extensive employing.Pile foundation technology mainly is plant equipment such as employing static pile press, and many prefabricated concrete pile tubes or prefabricated concrete solid pile are squeezed into the technology that is used as the building foundation in the stratum according to layout.
Wherein, the bearing capacity of the pile body 1 of a kind of prefabricated concrete pile tube of the prior art as shown in Figure 1 mainly is made up of two parts.A part is the frictional force that forms between a side soil layer, is also referred to as a side-friction force.Another part is the bearing capacity of pile tip that the pile crown seat crouches and forms on the bearing stratum in the stratum.The size of stake side-friction force is main relevant with the moisture content of soil property, and when underground SEA LEVEL VARIATION is big, thereby the side friction factor has the size that bigger change directly has influence on a side-friction force.And that whether big or small main the and pile crown of stake end carrying side enters bearing stratum as requested is relevant, when pile crown enters the good bearing stratum of geological conditions, bearing capacity of pile tip is basicly stable, on pile crown is arranged in bearing stratum or under the unfavorable geology layer time, bearing capacity of pile tip is extremely unstable.Therefore, in the basic engineering of building, generally all do one's utmost to avoid unsettled unfavorable geology layer.More satisfactory basic engineering is to make pile tube that certain degree of depth be arranged in ground, to obtain the stake side-friction force of designing requirement, also must make pile crown enter bearing stratum, to obtain the bearing capacity of pile tip of designing requirement.
But in practice of construction, the addressing of building is at first considered is ground factor but not underground factor.Therefore, building is selected on the basis of some earth formation complexity possibly.For example, the construction quality accident that residential building integral body that a building 13 story frame structures are near completion is collapsed has taken place at Luo Yang crossing, Minhang District lotus flower South Road, Shanghai City in June, 2009.This accident main cause is that the underground foundation of these both sides, north and south, building is asymmetric, cause the pile crown of a part of pile tube of same absolute altitude effectively to enter bearing stratum, and the pile crown of another part pile tube fails effectively to enter bearing stratum, entered the weak soil layer that is positioned at the bearing stratum below but penetrate bearing stratum, the bearing capacity of pile tip of both sides, north and south pile tube is seriously asymmetric.Simultaneously, this area is near the river course, and groundwater table is very unstable, just rains heavily before the accident happened, cause both sides, north and south pile tube the stake side-friction force, bearing capacity of pile tip is all seriously unbalance, makes great misfortune eventually.
This time accident has disclosed the long-term unsolved technical barrier of building lot technical field.In the prior art, for reaching the stake side-friction force of design, generally the projected depth to pile tube has certain requirement, and promptly pile tube must be squeezed into certain depth under the face of land so that produce enough side-friction forces between pile tube side and the soil layer.Simultaneously, for obtaining the bearing capacity of pile tip of designing requirement, pile tube also must be beaten on the bearing stratum of good geological conditions.But problem is that the earth formation under the face of land is very complicated, under a lot of situations, is positioned at the geological stratification at projected depth place under the face of land and is not suitable for doing bearing stratum.
In this case, existing pile foundation technology must adopt the supplementary technology means, the unfavorable geology layer under the face of land is done a technical finesse satisfy the requirement that becomes bearing stratum, otherwise just can't satisfy the requirement of stake side-friction force and bearing capacity of pile tip simultaneously.
Therefore, those skilled in the art is devoted to improve existing pile foundation technology always, to overcome the above-mentioned defective of prior art.
The utility model content
Because the above-mentioned defective of prior art, technical problem to be solved in the utility model provides a kind of the prefabricated concrete pile tube that side-friction force is big.
For achieving the above object, the utility model provides a kind of prefabricated concrete pile tube, comprises pile body at least, and described pile body is a hollow revolving body; The external surface of described pile body is for increasing rubbing surface.
Preferably, described increase rubbing surface is the concentric burr on the described pile body external surface.
Preferably, described increase rubbing surface is the screw thread on the described pile body external surface.
Preferably, described increase rubbing surface is a plurality of protuberances on the described pile body external surface.
Preferably, described increase rubbing surface is a plurality of corrugated parts on the described pile body external surface.
Preferably, described pile body is a cylinder.
Preferably, described pile body is the circular cone stage body with certain taper.
Preferably, described pile body is prefabricated concrete spare.
Prefabricated concrete pile tube of the present utility model is because the said structure design, the architecture advances of its external surface is for increasing rubbing surface, improved the friction factor of side, increased the stake side-friction force of prefabricated concrete pile tube, be particularly useful for earth formation and can not satisfy the construction environment that the pile foundation depth design requires.Can not satisfy in the construction environment of pile foundation depth design requirement at this class earth formation, owing to adopted prefabricated concrete pile tube of the present utility model, when guaranteeing that pile foundation effectively enters bearing stratum, even the pile foundation degree of depth is not enough, also can obtain the stake end support force and the stake side-friction force of designing requirement, satisfy the designing requirement of pile foundation.
Be described further below with reference to the technique effect of accompanying drawing, to understand the purpose of this utility model, feature and effect fully design of the present utility model, concrete structure and generation.
Description of drawings
Fig. 1 is the structural representation of a kind of prefabricated concrete pile tube in the prior art;
Fig. 2 is the structural representation of the embodiment 1 of prefabricated concrete pile tube of the present utility model;
Fig. 3 is the structural representation of the embodiment 2 of prefabricated concrete pile tube of the present utility model;
Fig. 4 is the structural representation of the embodiment 3 of prefabricated concrete pile tube of the present utility model;
Fig. 5 is the structural representation of the embodiment 4 of prefabricated concrete pile tube of the present utility model.
The specific embodiment
Embodiment 1:
As shown in Figure 2, among the embodiment of prefabricated concrete pile tube of the present utility model, comprise pile body 1, pile body 1 is the prefabricated concrete spare of a hollow revolving body, is hollow cylinder in the present embodiment.
The external surface 11 of pile body 1 is for increasing rubbing surface.Particularly, in the present embodiment, a plurality of concentric burr 12 on the external surface 11 that above-mentioned increase rubbing surface is a pile body.
Owing to be provided with a plurality of burrs 12, increased the friction factor of the external surface 11 of pile body 1, the side stressing conditions of prefabricated concrete pile tube of the present utility model improves.Compare with existing prefabricated concrete pile tube, squeeze in pile foundation under the situation of same geological conditions, the same degree of depth, the stake side-friction force of prefabricated concrete pile tube of the present utility model is strengthened greatly.
In other embodiments, pile body 1 also can be for having certain taper, a big smaller circular cone stage body.
Prefabricated concrete pile tube of the present utility model is because the said structure design, the architecture advances of its external surface is for increasing rubbing surface, improved the friction factor of side, increased the stake side-friction force of prefabricated concrete pile tube, be particularly useful for earth formation and can not satisfy the construction environment that the pile foundation depth design requires.Can not satisfy in the construction environment of pile foundation depth design requirement at this class earth formation, owing to adopted prefabricated concrete pile tube of the present utility model, when guaranteeing that pile foundation effectively enters bearing stratum, even the pile foundation degree of depth is not enough, also can obtain the stake end support force and the stake side-friction force of designing requirement, satisfy the designing requirement of pile foundation.
Embodiment 2:
As shown in Figure 3, the prefabricated concrete pile tube of present embodiment and the structure of the foregoing description are basic identical, all comprise a pile body 1, and institute's difference is, in the present embodiment, and the screw thread 12 on the external surface 11 that above-mentioned increase rubbing surface is a pile body 1.
Present embodiment has and the essentially identical technique effect of the foregoing description.
Embodiment 3:
As shown in Figure 4, the structure of present embodiment and embodiment 1 is basic identical, and institute's difference is, the increase rubbing surface on the pile body 1 is a plurality of protuberance l2 on the external surface 11 of pile body 1.
These a plurality of protuberances 12 can be for carving the piece type.
Present embodiment can be realized technique effect substantially the same manner as Example 1.
Embodiment 4:
As shown in Figure 5, the structure of present embodiment and embodiment 1 is basic identical, and institute's difference is, the increase rubbing surface on the pile body 1 is the corrugated part 12 on the external surface 11 of pile body 1.
Present embodiment can be realized technique effect substantially the same manner as Example 1.
Above-mentioned various prefabricated concrete pile tubes of the present utility model during fabrication need only be according to the shape needs of external surface, and the mould that is complementary according to the conventional method design gets final product, and it is simple to have processing technology, and cost is low, beneficial effects such as steady quality.
In sum, described in this manual is several preferred embodiment of the present utility model, and above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.All technician in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within claim protection domain of the present utility model.
Claims (8)
1. a prefabricated concrete pile tube comprises pile body at least, and described pile body is a hollow revolving body; It is characterized in that: the external surface of described pile body is for increasing rubbing surface.
2. prefabricated concrete pile tube as claimed in claim 1 is characterized in that: described increase rubbing surface is the concentric burr on the described pile body external surface.
3. prefabricated concrete pile tube as claimed in claim 1 is characterized in that: described increase rubbing surface is the screw thread on the described pile body external surface.
4. prefabricated concrete pile tube as claimed in claim 1 is characterized in that: described increase rubbing surface is a plurality of protuberances on the described pile body external surface.
5. prefabricated concrete pile tube as claimed in claim 1 is characterized in that: described increase rubbing surface is a plurality of corrugated parts on the described pile body external surface.
6. as the arbitrary described prefabricated concrete pile tube of claim 1 to 5, it is characterized in that: described pile body is a cylinder.
7. as the arbitrary described prefabricated concrete pile tube of claim 1 to 5, it is characterized in that: described pile body is the circular cone stage body with certain taper.
8. prefabricated concrete pile tube as claimed in claim 1 is characterized in that: described pile body is prefabricated concrete spare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200404702U CN201972146U (en) | 2011-02-17 | 2011-02-17 | Prefabricated concrete pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200404702U CN201972146U (en) | 2011-02-17 | 2011-02-17 | Prefabricated concrete pipe pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201972146U true CN201972146U (en) | 2011-09-14 |
Family
ID=44577253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200404702U Expired - Fee Related CN201972146U (en) | 2011-02-17 | 2011-02-17 | Prefabricated concrete pipe pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201972146U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644271A (en) * | 2011-02-17 | 2012-08-22 | 上海奥米制药装备有限公司 | Precast-concrete tubular pile |
| CN102900075A (en) * | 2012-01-05 | 2013-01-30 | 云南建工水利水电建设有限公司 | Helical concrete tubular pile device and production method thereof |
-
2011
- 2011-02-17 CN CN2011200404702U patent/CN201972146U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644271A (en) * | 2011-02-17 | 2012-08-22 | 上海奥米制药装备有限公司 | Precast-concrete tubular pile |
| CN102900075A (en) * | 2012-01-05 | 2013-01-30 | 云南建工水利水电建设有限公司 | Helical concrete tubular pile device and production method thereof |
| CN102900075B (en) * | 2012-01-05 | 2015-09-09 | 云南建工水利水电建设有限公司 | A kind of helix concrete tubular pile device and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Aomi Pharmaceutical Equipment Co., Ltd. Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20140217 |