CN205035794U - Reduce precast pile negative frictional force device - Google Patents
Reduce precast pile negative frictional force device Download PDFInfo
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- CN205035794U CN205035794U CN201520760963.1U CN201520760963U CN205035794U CN 205035794 U CN205035794 U CN 205035794U CN 201520760963 U CN201520760963 U CN 201520760963U CN 205035794 U CN205035794 U CN 205035794U
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- pile
- geotechnological
- precast pile
- frictional force
- adventitia
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Abstract
The utility model discloses a reduce precast pile negative frictional force device, by geotechnological inner membrance, geotechnological adventitia, thin oil film, blind end, go up the ribbon, the clamp is constituteed, the utility model discloses a reduce precast pile negative frictional force device can ensure the above pile section of precast pile neutral point effectively and the coefficient of friction between the soil layer is close for zero on every side, can eliminate the adverse effect of negative frictional force to the precast pile. The utility model discloses a reduce precast pile negative frictional force device, as long as the stake girth is the same, same model is applicable in the precast pile in various cross -sections such as circular, rectangle, square, triangle -shaped. The device simple structure, low cost, construction speed are soon, negative frictional force is effectual for the elimination precast pile.
Description
Technical field
The utility model relates to piling Technology field, specifically a kind of reduction preformed pile negative skin friction of pile device.
Background technology
Coastal area also exists a large amount of shallow-sea facies, liminetic facies, delta facies sedimentary formation, and they are generally soft foundation.Although pile foundation uses in a large number at soft foundation, also have many problems to fail to solve very well, reduce the problem that negative friction resistance of foundation piles is exactly a more complicated.Under normal circumstances, stake top sinks by vertical uniform load q, the frictional resistance that Pile side soil body is contrary with the direction of displacement of stake to stake generation, and frictional resistance action direction upwards; And when Pile side soil body is greater than the settling amount of stake because of some reason deflection, soil around pile is to the stake generation frictional resistance consistent with direction of displacement, frictional resistance action direction is downward, is unfavorable for that foundation pile carries, is negative friction.The most easily the negative skin friction of pile is produced in soft foundation.The measure of current minimizing preformed pile negative friction can be summarized as following several: 1, support pile method: reduce the stake lateral area through producing negative friction region as far as possible, adopt elongated stake in the conceived case, and adopting expansion pile head to improve end and hold ability at stake end, this is suitable only for end bearing pile; 2, clump of piles method: this method embodies efficiency of pile groups, to reduce the negative skin friction of pile by increasing stake number; 3, section construction method: this method is by after pile foundation construction 0.5-1, then continues its Superstructure Construction, can alleviate the effect of the negative skin friction of pile; 4, basement process, eliminates the soil layer negative skin friction of pile.There is the problems such as construction is complicated, cost is high, long in time limit in these methods.
Utility model content
In order to solve the above-mentioned technical problem existed in prior art, the utility model provides a kind of reduction preformed pile negative skin friction of pile device, be made up of geotechnological inner membrance, geotechnological adventitia, thin oil film, blind end, upper band, clip, described geotechnological inner membrance and geotechnological adventitia lower end closed are fixed as one, inner membrance diameter is identical with preformed pile diameter, with clip, device lower end is fixedly installed on the neutral point place of stake during use, device entirety is sheathed on pile body neutral point with epimere.
Further, described geotechnological inner membrance and the outer intermembranous lubrication oil of putting into of geotechnique form thin oil film.
Further, described upper band is fixedly installed on geotechnological adventitia upper end, can by inside and outside modular constraint together and can reduce the device upper end of the preformed pile negative skin friction of pile together with the colligation of pile body upper end.
Reduction preformed pile negative skin friction of pile device of the present utility model, as long as stake girth is identical, same model is applicable to the preformed pile in the various cross sections such as circle, rectangle, square, triangle.This apparatus structure is simple, with low cost, speed of application fast, it is effective to eliminate the preformed pile negative skin friction of pile.
Accompanying drawing explanation
Fig. 1 is the device generalized section reducing the preformed pile negative skin friction of pile;
Fig. 2 is the fixing rear generalized section of this device and preformed pile.
Detailed description of the invention
Below in conjunction with accompanying drawing, utility model is described further.
As shown in Figure 1-2, reduction preformed pile negative skin friction of pile device of the present utility model is made up of geotechnological inner membrance 1, geotechnological adventitia 2, thin oil film 3, blind end 4, upper band 5, clip 6, it is characterized in that: described geotechnological inner membrance 1 is fixed together with geotechnological adventitia 2 lower end closed, inner membrance diameter is identical with preformed pile diameter, with clip, device lower end is fixedly installed on the neutral point place of stake during use, device entirety is sheathed on pile body neutral point with epimere; Put lubrication oil between geotechnique's inner membrance 1 and geotechnological adventitia 2 and form thin oil film; Upper band 5 is fixedly installed on geotechnological adventitia 2 upper end, can by inside and outside modular constraint together and can reduce the device upper end of the preformed pile negative skin friction of pile together with the colligation of pile body upper end.
When reduction preformed pile negative skin friction of pile device of the present utility model is implemented to use, before preformed pile piling, with clip, reduction preformed pile negative skin friction of pile device lower end is fixedly installed on the neutral point place of stake, device entirety is sheathed on pile body neutral point with epimere, tighten band, preformed pile negative skin friction of pile device upper end being reduced together with the colligation of stake upper end, beating securing the preformed pile reducing preformed pile negative skin friction of pile device in (pressure) underground layer.
After construction of prefabricated piles completes, building run duration, pile peripheral earth sinks, and drives geotechnological adventitia to sink, has again the lubrication of thin oil film between the inside and outside film of geotechnique of otherwise smooth, make geotechnological inner membrance can not be subject to negative skin friction of pile effect, namely stake can not be subject to negative skin friction of pile effect.
Claims (3)
1. one kind reduces preformed pile negative skin friction of pile device, be made up of geotechnological inner membrance (1), geotechnological adventitia (2), thin oil film (3), blind end (4), upper band (5), clip (6), it is characterized in that: described geotechnological inner membrance (1) and geotechnological adventitia (2) lower end closed are fixed as one, inner membrance diameter is identical with preformed pile diameter, with clip, device lower end is fixedly installed on the neutral point place of stake during use, device entirety is sheathed on pile body neutral point with epimere.
2. reduce preformed pile negative skin friction of pile device as claimed in claim 1, it is characterized in that: put lubrication oil between described geotechnological inner membrance (1) and geotechnological adventitia (2) and form thin oil film.
3. reduce preformed pile negative skin friction of pile device as claimed in claim 1, it is characterized in that: described upper band (5) is fixedly installed on geotechnological adventitia (2) upper end, can by inside and outside modular constraint together and the device upper end of the preformed pile negative skin friction of pile can be reduced together with the colligation of pile body upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520760963.1U CN205035794U (en) | 2015-09-29 | 2015-09-29 | Reduce precast pile negative frictional force device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520760963.1U CN205035794U (en) | 2015-09-29 | 2015-09-29 | Reduce precast pile negative frictional force device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205035794U true CN205035794U (en) | 2016-02-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520760963.1U Expired - Fee Related CN205035794U (en) | 2015-09-29 | 2015-09-29 | Reduce precast pile negative frictional force device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205035794U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190762A (en) * | 2017-07-11 | 2017-09-22 | 中铁第四勘察设计院集团有限公司 | A kind of piling strtucture for reducing side friction |
| CN107447753A (en) * | 2017-07-10 | 2017-12-08 | 湖北长江清淤疏浚工程有限公司 | A kind of coating construction method waterborne for reducing the pile body force of negative friction |
| CN108277801A (en) * | 2018-01-25 | 2018-07-13 | 武汉大学 | A kind of device and method of abatement prefabricated tubular pile negative friction |
-
2015
- 2015-09-29 CN CN201520760963.1U patent/CN205035794U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447753A (en) * | 2017-07-10 | 2017-12-08 | 湖北长江清淤疏浚工程有限公司 | A kind of coating construction method waterborne for reducing the pile body force of negative friction |
| CN107190762A (en) * | 2017-07-11 | 2017-09-22 | 中铁第四勘察设计院集团有限公司 | A kind of piling strtucture for reducing side friction |
| CN108277801A (en) * | 2018-01-25 | 2018-07-13 | 武汉大学 | A kind of device and method of abatement prefabricated tubular pile negative friction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160217 Termination date: 20160929 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |