CN214940334U - Pile foundation for soft soil layer - Google Patents
Pile foundation for soft soil layer Download PDFInfo
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- CN214940334U CN214940334U CN202120627345.5U CN202120627345U CN214940334U CN 214940334 U CN214940334 U CN 214940334U CN 202120627345 U CN202120627345 U CN 202120627345U CN 214940334 U CN214940334 U CN 214940334U
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Abstract
The application relates to a pile foundation for a soft soil layer, which comprises a bearing platform arranged on the upper surface of the soft soil layer and a foundation pile vertically arranged in the soft soil layer, wherein the top of the foundation pile is fixedly connected with the top of the bearing platform; the foundation pile comprises a pile casing, a reinforcement cage and concrete, wherein the pile casing is vertical to the soft soil layer and is arranged in a hollow mode, the reinforcement cage and the concrete are arranged in the pile casing, the bearing platform is arranged at the top of the reinforcement cage in a penetrating mode, and the top of the reinforcement cage and the bearing platform are integrally poured. A water delivery pipeline for water delivery maintenance is arranged in the protective cylinder, and a plurality of water delivery holes communicated with the water delivery pipeline are formed in the inner wall of the protective cylinder; and geotextile for reducing the concrete entering the water delivery hole is arranged between the protective cylinder and the concrete. This application has the effect of being convenient for at soft soil layer pore-forming construction.
Description
Technical Field
The application relates to the field of building pile foundations, in particular to a pile foundation for a soft soil layer.
Background
In the municipal road construction, when roads or viaducts need to be built on soft soil layers, pile foundations are generally adopted. The pile foundation is a deep foundation which is formed by connecting the tops of a plurality of single piles into a whole through a bearing platform and jointly bears dynamic and static loads, and the single piles are vertical or inclined foundation components arranged in soil and are used for penetrating through soft high-compressibility soil layers or water and transmitting the loads borne by the piles to harder, denser or less compressible foundation bearing layers, and the single piles in the pile foundation are generally called foundation piles.
The existing pile foundation, as shown in fig. 4, includes a foundation pile vertically disposed in a soft soil layer and a bearing platform horizontally disposed on the top of the foundation pile, the bearing platform is located on the upper surface of the soft soil layer, the foundation pile is provided with a plurality of piles and arranged at intervals, and the foundation pile is fixedly connected with the bearing platform. The base via is typically drilled using large equipment.
Aiming at the related technology, the soft soil layer is soft, and the upper plastic soft soil flows into the bottom of the hole under the action of the self-weight stress in the hole forming process, so that the inventor thinks that the defect of difficult hole forming of the soft soil layer exists.
SUMMERY OF THE UTILITY MODEL
In order to facilitate the hole forming of the soft soil layer, the application provides a pile foundation for the soft soil layer.
The application provides a pile foundation for soft soil layer adopts following technical scheme:
a pile foundation for a soft soil layer comprises a bearing platform arranged on the upper surface of the soft soil layer and a foundation pile vertically arranged in the soft soil layer, wherein the top of the foundation pile is fixedly connected with the top of the bearing platform; the foundation pile comprises a pile casing, a reinforcement cage and concrete, wherein the pile casing is vertical to a soft soil layer and is arranged in a hollow mode, the reinforcement cage and the concrete are arranged in the pile casing, the bearing platform is arranged at the top of the reinforcement cage in a penetrating mode, and the top of the reinforcement cage and the bearing platform are integrally poured.
By adopting the technical scheme, during pile foundation construction, the pile casing is inserted into the soft soil layer, then the soft soil in the pile casing is taken out, and finally the reinforcement cage is placed in the pile casing and concrete is poured.
Optionally, a water conveying pipeline for water conveying maintenance is arranged in the protective cylinder, and a plurality of water conveying holes communicated with the water conveying pipeline are formed in the inner wall of the protective cylinder; and geotextile for reducing the concrete entering the water delivery hole is arranged between the pile casing and the concrete.
Through adopting above-mentioned technical scheme, need align after concrete placement and maintain, reserved conduit and water delivery hole in the pile casing, can pour into water and maintain the concrete in the pile casing from conduit after having pour the concrete.
Optionally, the protective cylinder comprises a plurality of unit cylinders, a ring groove is formed in the top end face of each unit cylinder, and a ring strip corresponding to the ring groove in shape is arranged on the bottom end face of each unit cylinder; the ring strip of the unit cylinder positioned above is clamped in the ring groove of the unit cylinder positioned below.
Through adopting above-mentioned technical scheme, will protect a split into a plurality of unit section of thick bamboo for the height that protects a section of thick bamboo can change according to actual need, has improved the suitability that protects a section of thick bamboo, still is convenient for the transportation of a unit section of thick bamboo.
Optionally, each ring strip is provided with a positioning block on the bottom end face for positioning the water pipeline, a positioning groove corresponding to the positioning block is formed at the bottom of each ring groove, and the positioning block is inserted into the positioning groove.
By adopting the technical scheme, the water conveying pipelines in the two adjacent unit cylinders are conveniently aligned and communicated.
Alternatively, the unit barrel positioned at the bottommost part is called a bottom barrel, and the bottom of the bottom barrel is arranged in a sharp manner.
By adopting the technical scheme, the bottom cylinder can conveniently advance in the soft soil layer.
Optionally, the bottom of the bottom barrel is provided with a leveling layer for enabling the end face of the bottom of the foundation pile to form a complete plane.
Through adopting above-mentioned technical scheme for concrete placement accomplishes the back, and the bottom terminal surface of foundation pile is comparatively level and smooth, makes the bearing capacity on the foundation pile can be comparatively even transmit for the holding power layer, improves the durability of foundation pile.
Optionally, a calibration piece for reducing inclination of the casing is arranged on the soft soil layer, the calibration piece comprises a straight cylinder sleeved outside the casing and a fixing plate horizontally fixed outside the straight cylinder, and the fixing plate is horizontally arranged on the surface of the soft soil layer; the protective cylinder is in sliding fit with the straight cylinder.
By adopting the technical scheme, the surface of the soft soil layer is leveled firstly, then the straight cylinder is inserted into the soft soil layer at the corresponding position, the fixing plate is tightly attached to the surface of the soft soil layer, and then the protective cylinder is inserted into the straight cylinder, so that the protective cylinder can be kept perpendicular to the surface of the soft soil layer as far as possible when being inserted into the soft soil layer.
Optionally, a cushion block for controlling the distance between the reinforcement cage and the inner wall of the protective cylinder is arranged on the reinforcement cage.
Through adopting above-mentioned technical scheme, the cushion can ensure the distance between steel reinforcement cage and the pile casing inner wall to protective layer thickness accord with the standard when making concrete placement.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the pile casing that adds for the weak soil on every side can not enter into the downthehole that is used for pouring the foundation pile when soft soil layer pore-forming.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is an enlarged view of the portion A in FIG. 1;
FIG. 3 is an enlarged view of the portion B of FIG. 1;
fig. 4 is a schematic view of the overall structure of a pile foundation in the related art.
Description of reference numerals: 1. a bearing platform; 2. foundation piles; 3. protecting the cylinder; 31. a cell cartridge; 311. a water delivery pipeline; 312. a water delivery hole; 32. a bottom cylinder; 33. a ring strip; 34. a ring groove; 35. positioning blocks; 36. positioning a groove; 4. a reinforcement cage; (ii) a 41. Cushion blocks; 5. concrete; 6. geotextile; 7. leveling layer; 8. a calibration piece; 81. a straight cylinder; 82. and (7) fixing the plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a pile foundation for soft soil layer. Referring to fig. 1, the pile foundation includes a bearing platform 1 disposed on a soft soil layer and a foundation pile 2 fixed on a lower surface of the bearing platform 1, the foundation pile 2 includes a pile casing 3, a reinforcement cage 4 disposed in the pile casing 3, and concrete 5, and the pile casing 3 is inserted into the soft soil layer and the bottom of the pile casing 3 contacts with a bearing layer.
Because the bearing layer generally is harder rock stratum, in order to make the bottom terminal surface comparatively level after concrete 5 pours in the casing 3, take out the weak soil in the casing 3 back, will protect 3 bottom pads on one deck screed-coat 7 of casing, put into steel reinforcement cage 4 again and pour concrete 5, the concrete 5 of accomplishing so can be better with the load transfer on upper portion for the bearing layer.
In order to ensure that the pile casing 3 is vertically inserted as much as possible when being inserted into a soft soil layer, the outer wall of one end, close to the bearing platform 1, of the pile casing 3 is provided with a calibration piece 8, the calibration piece 8 comprises a straight cylinder 81 sleeved outside the pile casing 3 and a fixing plate 82 horizontally fixed outside the straight cylinder 81, the surface of the soft soil layer is leveled during construction, the straight cylinder 81 is vertically inserted to a corresponding position, the fixing plate 82 is tightly attached to the surface of the soft soil layer, the pile casing 3 is inserted into the straight cylinder 81, and the straight cylinder 81 is in sliding fit with the pile casing 3.
Referring to fig. 1 and 2, if foundation pile 2 is long, casing 3 is too long to be transported and inserted into a soft soil layer, so casing 3 includes a plurality of unit cylinders 31. The top of each unit cylinder 31 is provided with a ring groove 34 with an inverted trapezoid cross section, and the bottom of each unit cylinder 31 is provided with a ring strip 33 corresponding to the ring groove 34. The ring strip 33 of the upper unit cylinder 31 is inserted into the ring groove 34 of the lower unit cylinder 31 to align the adjacent two unit cylinders 31.
When the foundation pile 2 is long, in order to facilitate the maintenance of the concrete 5 in the unit cylinder 31, a water conveying pipeline 311 vertically arranged is arranged in the unit cylinder 31, the inner wall of the unit cylinder 31 is provided with a plurality of water conveying holes 312, and the water conveying holes 312 are communicated with the water conveying pipeline 311. In order to facilitate the alignment and communication of the water pipes 311 in the two unit cylinders 31 adjacent to each other, the groove bottom of the ring groove 34 is provided with a positioning groove 36, the end surface of the ring strip 33 close to the ring groove 34 is provided with a positioning block 35, the positioning block 35 and the ring strip 33 are integrally arranged, and the positioning block 35 is clamped in the positioning groove 36. When the positioning block 35 is located in the positioning groove 36, the water pipes 311 of two unit cylinders 31 adjacent to each other are aligned and communicated.
In order to reduce the entering of the concrete 5 into the water delivery pipeline 311 from the water delivery hole 312 when the concrete 5 is poured, a layer of geotextile 6 is arranged on the inner wall of the unit cylinder 31, and the geotextile 6 is fixed on the inner wall of the unit cylinder 31.
Referring to fig. 1 and 3, the unit barrel 31 located at the bottommost part is referred to as a bottom barrel 32, and the bottom of the bottom barrel 32 is arranged sharply to facilitate insertion into a soft soil layer.
In order to control the distance between the reinforcement cage 4 and the unit cylinder 31, a plurality of spacers 41 are fixed to the reinforcement cage 4 so as to control the thickness of the protective layer of the reinforcement cage 4.
The implementation principle of the embodiment of the application is as follows: during construction, the surface of the soft soil layer is leveled, and the straight cylinder 81 is vertically inserted to make the fixing plate 82 tightly attached to the surface of the soft soil layer. The soft soil in the straight tube 81 is taken out by using equipment, the bottom tube 32 is placed in the straight tube 81, and the bottom tube 32 is pressed down to insert the bottom tube 32 into the soft soil layer. And continuously taking out the soft soil in the bottom barrel 32, stacking the unit barrel 31 on the bottom barrel 32, pressing down the unit barrel 31, repeating the operations until the bottom barrel 32 touches the bearing layer, taking out the soil in the bottom barrel 32, padding a leveling layer 7 at the bottom of the bottom barrel 32, putting the reinforcement cage 4 into the unit barrel 31, and pouring concrete 5.
When the concrete 5 needs to be cured, water is poured into the water conveying pipeline 311 of the topmost unit cylinder 31, and the water contacts the concrete 5 through the water conveying holes 312, so that the concrete 5 is cured. The exposed part of the top of the reinforcement cage 4 is integrally cast with the bearing platform 1.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A pile foundation for a soft soil layer comprises a bearing platform (1) arranged on the upper surface of the soft soil layer and a foundation pile (2) vertically arranged in the soft soil layer, wherein the top of the foundation pile (2) is fixedly connected with the top of the bearing platform (1); the method is characterized in that: foundation pile (2) including perpendicular to soft soil layer and the hollow a section of thick bamboo (3) that protect that sets up, set up steel reinforcement cage (4) and concrete (5) in protecting a section of thick bamboo (3), cushion cap (1) is worn to locate at the top of steel reinforcement cage (4), and steel reinforcement cage (4) top and cushion cap (1) integrative pouring.
2. Pile foundation for soft soil layers according to claim 1, characterized in that: a water conveying pipeline (311) for water conveying maintenance is arranged in the protective cylinder (3), and a plurality of water conveying holes (312) communicated with the water conveying pipeline (311) are formed in the inner wall of the protective cylinder (3); and a geotextile (6) for reducing the concrete (5) from entering the water conveying hole (312) is arranged between the pile casing (3) and the concrete (5).
3. Pile foundation for soft soil layers according to claim 2, characterized in that: the protective cylinder (3) comprises a plurality of unit cylinders (31), a ring groove (34) is formed in the top end face of each unit cylinder (31), and a ring strip (33) corresponding to the ring groove (34) in shape is arranged on the bottom end face of each unit cylinder (31); the ring strip (33) of the unit cylinder (31) positioned above is clamped in the ring groove (34) of the unit cylinder (31) positioned below.
4. A pile foundation for soft soil layers according to claim 3, characterised in that: each ring strip (33) is provided with a positioning block (35) on the end face of the bottom for positioning the water pipeline (311), each ring groove (34) is provided with a positioning groove (36) corresponding to the positioning block (35), and the positioning block (35) is inserted into the positioning groove (36).
5. Pile foundation for soft soil layers according to claim 4, characterized in that: the unit barrel (31) positioned at the bottommost part is called a bottom barrel (32), and the bottom of the bottom barrel (32) is arranged in a sharp mode.
6. Pile foundation for soft soil layers according to claim 5, characterized in that: and the bottom of the bottom barrel (32) is provided with a leveling layer (7) for enabling the end surface of the bottom of the foundation pile (2) to form a complete plane.
7. Pile foundation for soft soil layers according to claim 1, characterized in that: a calibration piece (8) used for reducing the inclination of the pile casing (3) is arranged on the soft soil layer, the calibration piece (8) comprises a straight cylinder (81) sleeved outside the pile casing (3) and a fixing plate (82) horizontally fixed outside the straight cylinder (81), and the fixing plate (82) is horizontally arranged on the surface of the soft soil layer; the protective cylinder (3) is in sliding fit with the straight cylinder (81).
8. Pile foundation for soft soil layers according to claim 1, characterized in that: and a cushion block (41) for controlling the distance between the reinforcement cage (4) and the inner wall of the pile casing (3) is arranged on the reinforcement cage (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120627345.5U CN214940334U (en) | 2021-03-27 | 2021-03-27 | Pile foundation for soft soil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120627345.5U CN214940334U (en) | 2021-03-27 | 2021-03-27 | Pile foundation for soft soil layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214940334U true CN214940334U (en) | 2021-11-30 |
Family
ID=79039670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120627345.5U Active CN214940334U (en) | 2021-03-27 | 2021-03-27 | Pile foundation for soft soil layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214940334U (en) |
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2021
- 2021-03-27 CN CN202120627345.5U patent/CN214940334U/en active Active
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