CN202466577U - Soil frictional resistance eliminating device of cast-in-situ bored pile - Google Patents
Soil frictional resistance eliminating device of cast-in-situ bored pile Download PDFInfo
- Publication number
- CN202466577U CN202466577U CN2012200734764U CN201220073476U CN202466577U CN 202466577 U CN202466577 U CN 202466577U CN 2012200734764 U CN2012200734764 U CN 2012200734764U CN 201220073476 U CN201220073476 U CN 201220073476U CN 202466577 U CN202466577 U CN 202466577U
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- frictional resistance
- sealing ring
- eliminating device
- tube
- soil
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Abstract
The utility model discloses a soil frictional resistance eliminating device of a cast-in-situ bored pile. Compared with the prior art, the soil frictional resistance eliminating device has differences including that a sealing ring limiting portion is formed on the outer wall of an inner tube, and a slidable rubber sealing ring is in sleeve joint with the sealing ring limiting portion. A reliable double-tube structure is formed by means of combining the glass fiber reinforced plastic tube with the rubber sealing ring and can stop slurry from entering a sandwich layer between two tubes during construction, the inner tube and the outer tube can slide without frictional resistance, accordingly, frictional force between the double tubes is eliminated, a frictional force eliminating performance and durability of the soil frictional resistance eliminating device are obviously superior to those of a steel sleeve, the soil frictional resistance eliminating device is economical, environment-friendly and energy-saving, is light in weight, high in strength and surface smoothness and low in frictional resistance owing to characteristics of glass fiber reinforced plastic materials, is hoisted and positioned conveniently and fast during construction, and is favorable for long-term use of a pile foundation as the corrosion resistance of the glass fiber reinforced plastic tube is good.
Description
Technical field
The utility model relates to the technical field of Pile Foundations Design construction, a kind of specifically bored pile soil body frictional resistance cancellation element, particularly its mechanical connecting structure.
Background technology
The bored pile stake is the important structure member of structure; Mainly be to utilize the frictional resistance of the soil body and end resistance that the tension anti-pulling capacity is provided; But under given conditions; Must eliminate the soil body frictional resistance of specific region,, therefore must adopt special technical measures to come to eliminate fully stake and push up frictional resistance to ground as there being the static loading test stage than the pile foundation or the buried pile foundation of big negative friction.
The friction-reducing measures that at present bored pile is commonly used be two sleeve technology, and present domestic general employing steel are as shell material, but in work progress, has many deficiencies:
1, is prone to pour into a large amount of water and soil and slurries between existing steel sleeve technology internal and external casing, causes the frictional force between internal and external casing to increase, thereby influence bearing capacity of single pile accuracy of experimental results and reliability;
2, the simple and easy and operating difficulties of the stopping means of steel sleeve; It is spacing to carry out ring-type, and lifting and heavy when putting inside and outside steel sleeve concentricity lower, the verticality of pile body is difficult to guarantee; Certainly will influence the ultimate bearing capacity accuracy of experimental results; Especially when the pile foundation resistance to compression, its stressed eccentric compression that shows as, the accuracy of test and reliability are difficult to guarantee;
3, the steel sleeve process unit is from great, suspension centre setting and lift strict demand, lifting difficulty, have a big risk;
4, steel sleeve joint welding concentricity and perpendicularity deviation are bigger, and welding sequence is complicated, the time spent is longer, and the face of weld poor flatness can increase the hoop frictional force between internal and external casing undoubtedly;
5, for the pile foundation of bearing negative friction for a long time, the steel pipe decay resistance is not good;
6, steel using amount is big, reclaims difficulty, does not meet economy, energy-conservation requirement.
Summary of the invention
So the purpose of the utility model is in the problems referred to above that exist to existing technology; A kind of bored pile soil body frictional resistance cancellation element is provided; Can satisfy the requirement of eliminating frictional resistance in the test pile process; Can reduce the cost of construction again, embody the durable theory of environmental protection and energy saving, overcome the shortcoming and defect that exists in the existing construction technology.
To achieve these goals; The technical scheme of the utility model is a kind of bored pile soil body frictional resistance cancellation element; Pipe and outer tube in it comprises; Form the gap between interior pipe and the outer tube, it is characterized in that: said outer wall of inner tube place forms the sealing ring limiting section, and sealing ring limiting section place is socketed with slidably rubber seal.
The utility model discloses a kind of bored pile soil body frictional resistance cancellation element, adopt glass reinforced plastic pipe bound rubber sealing ring to form reliable two-tube structure, this structure can stop construction period mud to get into the interlayer between two-tube, inside and outside two-tube realization do not have frictional resistance and slide; Thereby the frictional resistance between two-tube is eliminated, and the performance and durable of eliminating frictional resistance obviously is superior to steel sleeve, economy, environmental protection; Energy-conservation, this covering device utilizes the material behavior of glass fiber reinforced plastic, light weight, intensity height; Finish is high, and frictional resistance is little, lifts in the work progress; It is convenient to locate, behind the decay resistance of glass reinforced plastic pipe, favourable for the long-term use of pile foundation simultaneously.
Description of drawings
Fig. 1 is the utility model cross-sectional view.
Fig. 2 is a sealing ring limiting section partial enlarged drawing among Fig. 1.
The specific embodiment
With reference to the accompanying drawings, the utility model is further described.
The utility model is a kind of bored pile soil body frictional resistance cancellation element; Shown in Fig. 1 to Fig. 2, pipe 1 and outer tube 2 in it comprises, two-tube structure inside and outside the formation; Form gap 7 between interior pipe 1 and the outer tube 2; It is characterized in that: pipe 1 outer wall place forms sealing ring limiting section 3 in said, and sealing ring limiting section 3 places are socketed with slidably rubber seal 4, and slidably the rubber seal tectonic energy stops mud to get into the gap between the sleeve pipe.
In the specific implementation, said interior pipe 1 is the glass fiber reinforced plastic material with outer tube 2.
In the specific implementation, the punishment of said interior pipe 1 outer wall is furnished with protruding sealing ring limiting section 3.
Patent art adopts glass reinforced plastic pipe bound rubber sealing ring to form reliable two-tube structure, and this structure can stop construction period mud to get into the interlayer between two-tube, inside and outside two-tube realization do not have frictional resistance and slide, thereby the frictional resistance between two-tube is eliminated.Eliminate the performance and the durable steel sleeve that obviously is superior to of frictional resistance, economy, environmental protection, energy-conservation.
Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the utility model practical implementation is confined to above-mentioned these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of the utility model.
Claims (3)
1. bored pile soil body frictional resistance cancellation element; It comprises interior pipe (1) and outer tube (2); Form gap (7) between interior pipe (1) and the outer tube (2); It is characterized in that: pipe (1) outer wall place forms sealing ring limiting section (3) in said, and sealing ring limiting section (3) locates to be socketed with slidably rubber seal (4).
2. a kind of bored pile soil body frictional resistance cancellation element according to claim 1 is characterized in that: pipe (1) and outer tube (2) are the glass fiber reinforced plastic material in said.
3. a kind of bored pile soil body frictional resistance cancellation element according to claim 1 is characterized in that: the punishment of pipe (1) outer wall is furnished with protruding sealing ring limiting section (3) in said.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200734764U CN202466577U (en) | 2012-03-01 | 2012-03-01 | Soil frictional resistance eliminating device of cast-in-situ bored pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200734764U CN202466577U (en) | 2012-03-01 | 2012-03-01 | Soil frictional resistance eliminating device of cast-in-situ bored pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202466577U true CN202466577U (en) | 2012-10-03 |
Family
ID=46914745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200734764U Expired - Fee Related CN202466577U (en) | 2012-03-01 | 2012-03-01 | Soil frictional resistance eliminating device of cast-in-situ bored pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202466577U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109477323A (en) * | 2017-05-18 | 2019-03-15 | 金思文 | It is used to form the insertion cannula structure of concrete retaining wall |
-
2012
- 2012-03-01 CN CN2012200734764U patent/CN202466577U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109477323A (en) * | 2017-05-18 | 2019-03-15 | 金思文 | It is used to form the insertion cannula structure of concrete retaining wall |
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20200301 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |