CN201010902Y - Plastic tube with partially smooth and partially threaded surface used for cast-in-place concrete pile - Google Patents
Plastic tube with partially smooth and partially threaded surface used for cast-in-place concrete pile Download PDFInfo
- Publication number
- CN201010902Y CN201010902Y CNU2007200354798U CN200720035479U CN201010902Y CN 201010902 Y CN201010902 Y CN 201010902Y CN U2007200354798 U CNU2007200354798 U CN U2007200354798U CN 200720035479 U CN200720035479 U CN 200720035479U CN 201010902 Y CN201010902 Y CN 201010902Y
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- plastic bushing
- peg
- smooth
- pile
- utility
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Abstract
The utility model relates to a plastic bushing of a prior concrete peg, which is smooth in surface with partial screw thread. The upper surface of the plastic bushing in the utility model is smooth, while the lower surface is provided with screw thread. The utility model solves the deficiencies in the prior art that: when a downward pulling load presses on the peg, a peg body is destroyed, the groundwork of a peg end declines and the upper structure of the groundwork unevenly sinks, thus negative friction is generated, bearing load is lowered, deformation is increased, the surface with screw thread is pressed with a larger negative friction that a smooth surface do, bearing capacity is lowered and is unfavorable to a project; moreover, a half screw peg is low in construction speed, uneasy to control quality and high in cost. The utility model lowers the unfavorable factors caused by the negative friction and has advantages of enhancing the bearing capacity of a peg, lowering cost, enhancing strengthening effect and expending application range.
Description
Technical field
The utility model relates to a kind of cast-in-place foundation reinfored stake sleeve pipe, and particularly a kind of surface portion is smooth, the threaded plastic bushing of part.
Background technology
Before the present utility model, a kind of in situ concrete pile and vibration sinking tube in situ concrete pile, preformed pile and cement mixing pile etc. with plastic bushing, have system easy to control the quality, construction is simple and direct, consolidation effect good, low, the effective plurality of advantages such as environmental benefit that limited pile material to spread in ground of reinforcing expense, among progressively applying.This stake type is used among the Soft Soils Consolidation in A of roadbed, dykes and dams more.
Its sleeve pipe of the in situ concrete pile of this band plastic bushing is no matter be double-walled or single wall, and its bushing outer surface all is along the long full thread up and down of stake.The plastic sheath pile tube of this full thread can provide larger side frictional resistance and bearing capacity.But, the plastic sheath pile tube of this full thread is when using in the Soft Soils Consolidation in A of rigid pile composite foundation under flexible load effects such as roadbed, dykes and dams, though pile body bears most of load, inter-pile soil also is subjected to the fractional load effect, owing to causing in the long scope of stake of pile soil horizon deflection greater than the pile body deflection, multiple reason will produce all negative frictions of stake, the downdrag of its generation affacts in the stake, may will cause the differential settlement of pile body destruction, pile end groundwork surrender or destruction and superstructure.Its settling amount is greater than the settling amount of pile body, top weak soil part particularly, its distortion difference is bigger, will cause the negative skin friction of pile like this, this part frictional force will make that the bearing capacity of stake reduces, distortion increases, and pile body is produced downdrag, and will be totally unfavorable to engineering, the spacing that needs to strengthen the construction depth of pile body or reduce stake in actual engineering solves this problem, thereby has increased construction costs.Negative skin friction of pile depth of interaction has certain scope, be that its top of whole pile body will be subjected to the negative skin friction of pile, it is long that its scope is about 0.5～1.0 times of stake, the character of the depth of burying of the concrete degree of depth and weak soil, pile body construction depth, the substratum soil body, the factors such as size of structure load are relevant, can estimate in advance.The following pile body of neutral point partly is subjected to is only positive frictional force.And the stake of this full thread, it is subjected to the part of the negative skin friction of pile, because the surface of its screw thread is compared with smooth surface and will be subjected to the bigger negative skin friction of pile, has reduced bearing capacity, and is unfavorable to engineering.But be subjected to the part of positive frictional force, its screw thread can provide more large bearing capacity.Therefore the plastic sheath pile tube of this full thread or other full thread stake etc. are to exist above-mentioned defective when the soft foundation of flexible structures such as reinforcing road bed, dykes and dams.Semi-screw pile can solve the above-mentioned defective of part, but it is a kind of preformed pile or common in situ concrete pile, is not with plastic bushing, so it can't have advantages such as fast, the easy to control the quality system of this speed of application of plastic sleeve concrete pile, cost be low.
Summary of the invention
The purpose of this utility model just is to overcome above-mentioned defective, develops a kind of smooth, part threaded plastic sleeve pipe of surface portion that is used in situ concrete pile.
The technical solution of the utility model is:
The threaded plastic bushing of surface portion smooth part that is used in situ concrete pile, its major technique are characterised in that plastic bushing top pile body external surface is smooth, and bottom pile body external surface is threaded.
Advantage of the present utility model and effect are to reduce the unfavorable factor that the negative skin friction of pile is brought, improve stake bearing capacity, reduce cost, improve consolidation effect, enlarged advantage such as range of application.
Specific as follows:
Plastic bushing setting plastic sleeve concrete pile need be made the time, the loading characteristic of consolidated subsoil as required, to estimate that being subjected to the negative skin friction of pile partly is the plastic bushing that the top long scope of certain stake adopts smooth outer surface, its inner surface both can be that screw thread also can be smooth, and all the other are subjected to the plastic bushing that positive frictional force part still adopts thread surface.Then that this surface portion is smooth, part threaded plastic sleeve pipe uses as the outer tube of plastic sleeve concrete pile, overcome the downdrag that negative friction produces and affact in the stake, the defectives such as differential settlement of destruction, pile end groundwork surrender or destruction and the superstructure that pile body is caused.The utility model passes through to adopt surperficial different sleeve pipe forms, thereby has reduced the harm that the negative skin friction of pile is brought, and can give full play to the effect of plastic bushing, thereby significantly reduces construction costs, raising consolidation effect, enlarges range of application.
Description of drawings
Fig. 1--surface portion smooth part threaded plastic sleeve structure generalized section.
The schematic diagram that the plastic bushing of Fig. 2--the bending of band stake point is put in advance from the steel pipe bottom.
Fig. 3--with the utility model accomplish fluently the stake schematic diagram.
The specific embodiment
As shown in Figure 1, surface portion is smooth, part threaded plastic sleeve pipe 5, estimating that pile body brings into play the bottom of the plastic bushing 5 of positive frictional force and adopt outer threadedly, adopt smooth surface on the top of the plastic bushing 5 of estimating the pile body performance negative skin friction of pile, sleeve pipe adopts the connection of plastic bushing joint.
As shown in Figure 4, adopt flexible plastic sleeve pipe 5, promptly use soft various PE single walls or double-walled plastic bushing, or the plastic bushing 5 made of the PVC plastic bushing of single wall, steel pipe 1 vertically is provided with, fixed arm 2 is fixedlyed connected with steel pipe 1, and plastic bushing 5 is put into steel pipe 1 under rope 4 auxiliary drawing in, and plastic bushing 5 tips are provided with stake point 3.
Start the machine that sets, adopt the mode of static pressure or vibration to sink to the degree of depth of designing requirement in advance together with the plastic bushing 5 of the inside steel pipe 1 after, again steel pipe 1 is extracted ground, plastic bushing 5 is owing to have the stake point 3 of enlarged cross section and then can stay in the ground; Just setting of such plastic bushing 5 finished; Move and to set machine to the position that next root need set and set another root plastic bushing 5, set until the monolithic zone that will need reinforcement or whole ground and finish by above-mentioned method.
Concreting or other inserts in plastic bushing 5 then, the concrete that this operation can adopt factory to produce in advance or method such as job mix forms is that the plastic bushing 5 of cavity is all filled full with the centre, and vibration compacting in addition, make the strength of the mixing pile that reaches designing requirement, as C10～C30 etc., also can put into reinforcing bar earlier, concreting again forms the pile body of steel concrete.
As shown in Figure 3, be the in situ concrete pile of the surface portion smooth part threaded plastic plastic bushing 5 that formed.The pile body part of the performance negative skin friction of pile is shown among Fig. 36, and the pile body part of bringing into play positive frictional force is shown among Fig. 37.
Principle of the present utility model and technology can be widely used in various reinforcement of soft soil, slope reinforcement stake.
The claimed scope of the utility model is not limited only to foregoing description.
Claims (6)
1. the threaded plastic bushing of surface portion smooth part that is used in situ concrete pile it is characterized in that plastic bushing top pile body external surface is smooth, and bottom pile body external surface is threaded.
2. the threaded plastic bushing of surface portion smooth part that is used in situ concrete pile according to claim 1 is characterized in that plastic bushing is flexible.
3. the threaded plastic bushing of surface portion smooth part that is used in situ concrete pile according to claim 1 and 2 is characterized in that plastic bushing makes with the PVC plastics.
4. the threaded plastic bushing of surface portion smooth part that is used in situ concrete pile according to claim 3 is characterized in that the plastic bushing that the PVC plastics are made is a single wall.
5. the threaded plastic bushing of surface portion smooth part that is used in situ concrete pile according to claim 1 and 2 is characterized in that plastic bushing is that the PE plastics are made.
6. the threaded plastic bushing of surface portion smooth part that is used in situ concrete pile according to claim 5 is characterized in that the plastic bushing that the PE plastics are made is double-walled or single wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200354798U CN201010902Y (en) | 2007-03-22 | 2007-03-22 | Plastic tube with partially smooth and partially threaded surface used for cast-in-place concrete pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200354798U CN201010902Y (en) | 2007-03-22 | 2007-03-22 | Plastic tube with partially smooth and partially threaded surface used for cast-in-place concrete pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201010902Y true CN201010902Y (en) | 2008-01-23 |
Family
ID=39045846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200354798U Expired - Fee Related CN201010902Y (en) | 2007-03-22 | 2007-03-22 | Plastic tube with partially smooth and partially threaded surface used for cast-in-place concrete pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201010902Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839655A (en) * | 2012-09-18 | 2012-12-26 | 中国地质大学（武汉） | Cast-in-place five-star-shaped end part threaded tapered pile and construction method of cast-in-place five-star-shaped end part threaded tapered pile |
| CN102839654A (en) * | 2012-09-18 | 2012-12-26 | 中国地质大学（武汉） | Cast-in-place X-shaped tapered pile with threaded end and construction method of tapered pile |
| CN107893416A (en) * | 2017-12-22 | 2018-04-10 | 长安大学 | A kind of plastic bushing device for being used to reduce force of negative friction impact effect suffered by bored concrete pile |
-
2007
- 2007-03-22 CN CNU2007200354798U patent/CN201010902Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839655A (en) * | 2012-09-18 | 2012-12-26 | 中国地质大学（武汉） | Cast-in-place five-star-shaped end part threaded tapered pile and construction method of cast-in-place five-star-shaped end part threaded tapered pile |
| CN102839654A (en) * | 2012-09-18 | 2012-12-26 | 中国地质大学（武汉） | Cast-in-place X-shaped tapered pile with threaded end and construction method of tapered pile |
| CN102839655B (en) * | 2012-09-18 | 2014-04-09 | 中国地质大学（武汉） | Cast-in-place five-star-shaped end part threaded tapered pile and construction method of cast-in-place five-star-shaped end part threaded tapered pile |
| CN107893416A (en) * | 2017-12-22 | 2018-04-10 | 长安大学 | A kind of plastic bushing device for being used to reduce force of negative friction impact effect suffered by bored concrete pile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 Termination date: 20130322 |