CN218622194U - Rigid-flexible combined pile - Google Patents
Rigid-flexible combined pile Download PDFInfo
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- CN218622194U CN218622194U CN202222015821.5U CN202222015821U CN218622194U CN 218622194 U CN218622194 U CN 218622194U CN 202222015821 U CN202222015821 U CN 202222015821U CN 218622194 U CN218622194 U CN 218622194U
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- hollow pile
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Abstract
The utility model provides a hard and soft composite pile is a composite pile that upper portion rigidity stake and lower part flexible pile combine belongs to the composite pile field for the building, its structure including prefabricated hollow pile and with the flexible pile that combines at the bottom of the prefabricated hollow pile stake, prefabricated hollow pile is prefabricated concrete hollow pile, has seted up vertical through-hole on it, and prefabricated hollow pile's intensity is greater than the intensity of flexible pile. The utility model provides a precast hollow pile plant the difficult problem of stake in the silt layer, overcome and close on the uneven defect of pile length that the stratum condition caused because underground silt layer undulates down, the original state soil body of the precast hollow pile lower part of make full use of has increased stake side resistance and stake end resistance, has reduced reinforced concrete's use, energy saving and emission reduction.
Description
Technical Field
The utility model relates to a composite pile for building, specifically speaking are rigid and flexible composite pile.
Background
When the prefabricated hollow pile foundation is constructed in the building engineering, the railway engineering or the municipal engineering, the prefabricated hollow pile is mainly sunk into a preset bearing stratum section by section through a hammering method or a static pressure method.
The hammering method is a construction method for sinking a precast pile into a foundation by the impact energy generated when a pile hammer of a pile driver falls to the pile top of the precast pile, and is suitable for the conditions of plastic cohesive soil, sandy soil, silt, fine sand and loose gravel soil; the static pressure method is that the prefabricated pile is pressed into the soil by utilizing the dead weight of the pile frame and the static reaction force provided by hydraulic pressure or a pulley block.
The resistance of the hammering method and the static pressure method is not suitable for the silt layer.
Disclosure of Invention
The technical task of the utility model is to prior art not enough, provide a hard and soft composite pile.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a hard and soft composite pile, includes prefabricated hollow pile and the flexible pile that combines with the pile bottom of prefabricated hollow pile, prefabricated hollow pile is prefabricated concrete hollow pile, has seted up vertical through-hole on it, and the intensity of prefabricated hollow pile is greater than the intensity of flexible pile.
Furthermore, the prefabricated hollow pile is in a round tube shape, a square tube shape or a bamboo joint tube shape.
Furthermore, the prefabricated hollow pile is of an integral structure, and the cross sections of any position are the same.
Further, the concrete strength grade of the prefabricated hollow pile is between C60 and C125.
Furthermore, the flexible pile is a cement soil pile with the strength lower than 30MPa, and additives can be added into the cement soil pile according to needs.
Furthermore, the additive is a diagenesis agent, a retarder, an accelerator, an early strength agent, a water reducing agent and an air entraining agent.
Furthermore, the length ratio of the prefabricated hollow pile to the flexible pile is 10% -1000%.
Furthermore, the difference between the outer diameter of the prefabricated hollow pile and the outer diameter of the cement-soil pile is-100 mm-500 mm.
Further, the ratio of the outer diameter of the prefabricated hollow pile to the outer diameter of the flexible pile is 50% -200%.
Compared with the prior art, the utility model, produced beneficial effect is:
the utility model provides a precast hollow pile plant the difficult problem of stake in the silt layer, overcome and close on the uneven defect of pile length that the stratum condition caused because underground silt layer undulates down, the original state soil body of the precast hollow pile lower part of make full use of has increased stake side resistance and stake end resistance, has reduced reinforced concrete's use, energy saving and emission reduction.
Drawings
Fig. 1 is a schematic front sectional view of a first embodiment of the present invention;
FIG. 2 isbase:Sub>A schematic sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic front sectional view illustrating a second embodiment of the present invention;
FIG. 4 is a schematic sectional view taken along line B-B of FIG. 3;
fig. 5 is a schematic structural view of a front view cross section of a third embodiment of the present invention;
fig. 6 is a schematic cross-sectional view taken along the direction C-C of fig. 5.
In the figure, 1, a prefabricated hollow pile, 1-1, a longitudinal through hole and 2, a flexible pile.
Detailed Description
The following detailed description of a rigid-flexible composite pile according to the present invention is made with reference to the accompanying drawings 1-6.
The first embodiment is as follows:
as shown in the attached figures 1-2, the rigid-flexible combined pile comprises a prefabricated hollow pile 1 and a flexible pile 2 combined with the lower end of the prefabricated hollow pile 1.
The prefabricated hollow pile 1 is a prefabricated concrete hollow pile, a longitudinal through hole 1-1 is formed in the prefabricated hollow pile 1, the prefabricated hollow pile 1 is in a round tube shape, the cross sections of all the parts are identical, and the concrete strength grade of the prefabricated hollow pile 1 is C80; the flexible pile 2 is a cement soil pile, the pile body cement soil compressive strength of the flexible pile 2 is 2MPa, the length of the prefabricated hollow pile 1 is equal to that of the flexible pile 2, and the outer diameter of the prefabricated hollow pile 1 is equal to that of the flexible pile 2.
The construction method of the rigid-flexible combined pile adopts a hammering method to sink the precast concrete hollow pile to a preset elevation; a self-drilling high-pressure jet grouting drilling tool is lowered to the bottom of the precast concrete hollow pile along the cavity of the precast concrete hollow pile; drilling the rotary-spraying high-pressure slurry in a soil body to a preset cement-soil pile end bearing layer; and carrying out re-spraying on the part of the cement soil pile body needing to be reinforced.
Example two:
as shown in fig. 3-4, the rigid-flexible combined pile of the present invention comprises a prefabricated hollow pile 1 and a flexible pile 2 combined with the lower end of the prefabricated hollow pile 1.
The prefabricated hollow pile 1 is a prefabricated concrete hollow pile, a longitudinal through hole 1-1 is formed in the prefabricated hollow pile 1, the prefabricated hollow pile 1 is in a round tube shape, the cross sections of all the parts are identical, and the concrete strength grade of the prefabricated hollow pile 1 is C105; the flexible pile 2 is a cement soil pile doped with a diagenetic agent, the compressive strength of cement soil of the pile body of the flexible pile 2 is 5MPa, the length of the prefabricated hollow pile 1 is twice that of the flexible pile 2, and the outer diameter of the prefabricated hollow pile 1 is 50% of that of the flexible pile 2.
The construction method of the rigid-flexible combined pile adopts a static pressure method to sink the precast concrete hollow pile to a preset elevation; a self-drilling high-pressure jet grouting drilling tool is lowered to the bottom of the precast concrete hollow pile along the cavity of the precast concrete hollow pile; drilling in soil body with jet grouting high pressure slurry, and drilling into a preset cement soil pile end bearing layer; and carrying out re-spraying on the part of the cement soil pile body needing to be reinforced.
Example three:
as shown in fig. 5 to 6, the rigid-flexible combined pile comprises a prefabricated hollow pile 1 and a flexible pile 2 combined with the lower end of the prefabricated hollow pile 1.
The prefabricated hollow pile 1 is a prefabricated concrete hollow pile, a longitudinal through hole 1-1 is formed in the prefabricated hollow pile 1, the prefabricated hollow pile 1 is square-tube-shaped, the cross sections of all the parts are identical, and the concrete strength grade of the prefabricated hollow pile 1 is C80.
The flexible pile 2 is a cement soil pile, the outer diameter of the flexible pile is gradually increased from top to bottom to be trapezoidal, the cement soil compressive strength of the pile body of the flexible pile 2 is 10MPa, the length of the prefabricated hollow pile 1 is twice of the length of the flexible pile 2, the outer diameter of the prefabricated hollow pile 1 is equal to the outer diameter of the flexible pile 2 at a joint, and then the outer diameter of the flexible pile 2 is gradually increased to twice of the outer diameter of the prefabricated hollow pile 1.
The construction method of the rigid-flexible combined pile adopts a hammering method or a static pressure method to sink the precast concrete hollow pile to a preset elevation; a self-drilling high-pressure jet grouting drilling tool is lowered to the bottom of the precast concrete hollow pile along the cavity of the precast concrete hollow pile; drilling in a soil body by rotary spraying high-pressure slurry, gradually increasing the slurry pressure, and drilling into a preset cement-soil pile end bearing layer; and carrying out re-spraying on the part of the cement soil pile body needing to be reinforced.
Claims (8)
1. The rigid-flexible combined pile comprises a prefabricated hollow pile (1) and a flexible pile (2) combined with the bottom of the prefabricated hollow pile (1), and is characterized in that the prefabricated hollow pile (1) is a prefabricated concrete hollow pile, a longitudinal through hole (1-1) is formed in the prefabricated concrete hollow pile, and the strength of the prefabricated hollow pile (1) is greater than that of the flexible pile (2).
2. A rigid-flexible combined pile according to claim 1, characterized in that the prefabricated hollow pile (1) is in a shape of a circular tube, a square tube or a bamboo tube.
3. A rigid-flexible composite pile according to claim 1, characterised in that the prefabricated hollow pile (1) is of a unitary construction, the cross-section being the same anywhere.
4. A rigid-flexible composite pile according to claim 1, characterised in that the prefabricated hollow pile (1) has a concrete strength rating between C60 and C125.
5. A rigid-flexible combined pile according to claim 1, characterised in that the flexible pile (2) is a cement-soil pile with strength lower than 30 MPa.
6. A rigid-flexible combined pile according to claim 1, characterised in that the ratio of the length of the prefabricated hollow pile (1) to the length of the flexible pile (2) is 10-1000%.
7. A rigid-flexible combined pile according to claim 1, characterized in that the difference between the outer diameter of the prefabricated hollow pile (1) and the outer diameter of the cement-soil pile is-100 mm-500 mm.
8. A rigid-flexible combined pile according to claim 1, characterised in that the ratio of the external diameters of the prefabricated hollow pile (1) and the flexible pile (2) is between 50% and 200%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222015821.5U CN218622194U (en) | 2022-08-02 | 2022-08-02 | Rigid-flexible combined pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222015821.5U CN218622194U (en) | 2022-08-02 | 2022-08-02 | Rigid-flexible combined pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218622194U true CN218622194U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222015821.5U Active CN218622194U (en) | 2022-08-02 | 2022-08-02 | Rigid-flexible combined pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218622194U (en) |
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2022
- 2022-08-02 CN CN202222015821.5U patent/CN218622194U/en active Active
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