CN213897088U - PSB finish rolling screw-thread steel prestressed concrete fender pile structure - Google Patents
PSB finish rolling screw-thread steel prestressed concrete fender pile structure Download PDFInfo
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- CN213897088U CN213897088U CN202021668889.8U CN202021668889U CN213897088U CN 213897088 U CN213897088 U CN 213897088U CN 202021668889 U CN202021668889 U CN 202021668889U CN 213897088 U CN213897088 U CN 213897088U
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Abstract
The utility model provides a PSB finish rolling deformed steel bar prestressed concrete support pile structure, which comprises a cast-in-place concrete pile hole, a constructional steel reinforcement cage, a bearing body, a concrete cushion, a plurality of tensioning anchoring parts, a plurality of fixing parts and a plurality of PSB finish rolling deformed steel bars; adopt the utility model discloses a PSB finish rolling screw-thread steel prestressed concrete fender pile structure applys prestressing force through PSB finish rolling twisted steel, lets PSB finish rolling screw-thread steel prestressed concrete fender pile in the excavation supporting engineering with horizontal atress, increases the bending strength of pile body, can the effective control foundation ditch displacement, practices thrift engineering cost simultaneously.
Description
Technical Field
The utility model relates to a excavation supporting technical field, in particular to PSB finish rolling screw-thread steel prestressed concrete fender pile structure.
Background
In the field of civil engineering, the support pile is mainly made of HRB (high-grade steel) steel bars basically, but the HRB steel bars are low in tensile strength, and the HRB steel bars are adopted as the steel bars of the support pile rod body, so that a large amount of steel bars are consumed, and the support workload is large; the PSB finish rolling screw-thread steel is used as a material of the supporting pile, so that the using amount of steel bars can be effectively reduced, the lateral pressure resistance of a pile body is greatly improved, the horizontal displacement of the pile top is reduced, and if the PSB finish rolling screw-thread steel is combined with a main structure, the PSB finish rolling screw-thread steel can play a role in uplift pile.
At present, the supporting pile structure generally adopts HRB reinforcing steel bars, the pile body reinforcing steel bar amount is large for deep and large foundation pits, the pile body pressure resistance is general, the pile body interval is very small in foundation pit supporting engineering, and the engineering amount is huge.
Therefore, a supporting pile capable of greatly improving the lateral pressure resistance, reducing the using amount of reinforcing steel bars and greatly reducing the horizontal displacement of the pile top is needed.
SUMMERY OF THE UTILITY MODEL
In order to achieve the purpose, the utility model provides a PSB finish rolling deformed steel bar prestressed concrete support pile structure, which comprises a cast-in-place concrete pile hole, a constructional steel reinforcement cage, a bearing body, a concrete cushion layer, a plurality of tensioning anchoring pieces, a plurality of fixing parts and a plurality of PSB finish rolling deformed steel bars, wherein the cast-in-place concrete pile hole is arranged in a side wall soil body needing foundation pit support;
the structure steel bar cage consists of HRB common steel bars and stirrups, the PSB finish rolling threaded steel bar is cylindrical, and the fixing part is arranged at the lower end of the PSB finish rolling threaded steel bar and is used for fixedly connecting the structure steel bar cage with the PSB finish rolling threaded steel bar; the structural reinforcement cage and the PSB finish rolling threaded steel bar are arranged in a cast-in-place concrete pile hole; the PSB finish rolling twisted steel penetrates through the upper end face of the cast-in-place concrete pile hole;
the concrete cushion layer is arranged at the upper end part of the cast-in-place concrete pile hole, the bearing body is arranged on the upper end surface of the concrete cushion layer, the PSB finish-rolled threaded steel bars penetrate through the concrete cushion layer and the bearing body, the tensioning anchoring part is arranged on the upper end surface of the bearing body, the tensioning anchoring part is fixedly connected with the PSB finish-rolled threaded steel bars, and the tensioning anchoring part is used for locking the PSB finish-rolled threaded steel bars and applying prestress to a PSB finish-rolled threaded steel prestressed concrete support pile structure; and concrete is poured into the hole of the cast-in-place concrete pile.
Furthermore, the PSB finish rolling twisted steel is uniformly arranged in the constructional steel reinforcement cage along the axial direction of the cast-in-place concrete pile hole.
Furthermore, the PSB finish rolling threaded steel bars and the HRB common steel bars are arranged in a staggered mode.
Further, the diameter of the hole of the cast-in-place concrete pile is larger than or equal to 500mm, and mechanical or manual hole forming is adopted.
Furthermore, the outer periphery of the PSB finish rolling twisted steel is provided with external threads, an internal thread hole matched with the external threads of the outer periphery of the PSB finish rolling twisted steel is formed inside the tensioning anchoring piece, and the tensioning anchoring piece is connected with the PSB finish rolling twisted steel through threads to form fixed connection.
Furthermore, the PSB finish-rolled deformed steel bar prestressed concrete support pile structure also comprises a plurality of thin steel pipes, a channel for PSB finish-rolled deformed steel bars to pass through is arranged in each thin steel pipe, and the thin steel pipes are arranged in the concrete cushion layer and the bearing body and penetrate through the concrete cushion layer and the bearing body; and cement slurry is poured into the channel of the thin steel pipe.
The utility model discloses a beneficial effect does: the utility model discloses a PSB finish rolling screw-thread steel prestressed concrete fender pile structure through burying PSB finish rolling twisted steel underground, after pile body concrete reaches the design age, makes PSB finish rolling twisted steel be in the state of drawing tension through stretch-draw anchor assembly to fine solution current conventional screw-thread steel concrete fender pile can't have the technical problem of higher bending resistance, resistance to plucking nature. When the pile is used as a supporting structure, the using amount of steel bars can be greatly reduced, the lateral pressure resistance is improved, the horizontal displacement of the pile top is greatly reduced, and if the pile is combined with a main structure, the pile can play a role in uplift resistance.
Drawings
FIG. 1 is a schematic structural view of a PSB finish-rolled deformed steel bar prestressed concrete support pile;
fig. 2 is a schematic diagram of a staggered arrangement structure of PSB finish-rolled threaded steel bars and HRB common steel bars in a constructed steel bar cage.
In the figure: 1. pouring a concrete pile hole, 2.PSB finish rolling twisted steel, 3 bearing bodies, 4 concrete cushion layers, 5. thin steel pipes, 6. fixing parts, 7. tensioning anchoring parts, 8.HRB common steel bars and 9 stirrups.
Detailed Description
This embodiment is described in further detail below with reference to the embodiment of fig. 1. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
The PSB finish-rolled deformed steel bar prestressed concrete support pile structure comprises a cast-in-place concrete pile hole 1, a plurality of PSB finish-rolled deformed steel bars 2, a supporting body 3, a concrete cushion layer 4, a plurality of thin steel pipes 5, a plurality of fixing parts 6, a plurality of tensioning anchoring parts 7, a plurality of HRB common steel bars 8 and a plurality of stirrups 9;
the cast-in-place concrete pile hole 1 is arranged beside the side wall soil needing foundation pit support, the diameter is larger than or equal to 500mm, and the cast-in-place concrete pile hole 1 is formed by a mechanical drilling machine or other modes;
the HRB common steel bars 8 and the stirrups 9 form a structural steel reinforcement cage, and the reinforcement allocation amount of the structural steel reinforcement cage and the number of the PSB finish rolling threaded steel bars 2 are obtained through calculation;
the outer circumferential surface of the PSB finish-rolled twisted steel 2 is provided with external threads, the PSB finish-rolled twisted steel 2 is uniformly arranged in a constructional reinforcement cage 8 along the axial direction of a cast-in-place concrete pile hole 1, the PSB finish-rolled twisted steel 2 and HRB common steel bars are arranged in a staggered and spaced mode, and the fixing part 6 is used for fixing the PSB finish-rolled twisted steel 2 on the constructional reinforcement cage;
the structural reinforcement cage and the PSB finish rolling threaded steel bars 2 are arranged inside the cast-in-place concrete pile hole 1, and the PSB finish rolling threaded steel bars 2 penetrate through the upper end part of the cast-in-place concrete pile hole 1;
the concrete cushion layer 4 is arranged at the upper part of the cast-in-place concrete pile hole 1 and is made of concrete by casting, the bearing body 3 is an existing crown beam or a bearing platform, a channel for the PSB finish rolling threaded steel bar 2 to pass through is arranged in the thin steel pipe 5, and the thin steel pipe 5 is arranged in the concrete cushion layer 4 and the bearing body 3 and penetrates through the concrete cushion layer 4 and the bearing body 3;
the tensioning anchoring piece 7 is arranged on the upper end face of the supporting body 3, a threaded hole matched with the external thread of the outer circumferential surface of the PSB finish-rolled deformed bar 2 is formed in the tensioning anchoring piece 7, and the tensioning anchoring piece 7 is used for locking the PSB finish-rolled deformed bar 2 and applying prestress to the PSB finish-rolled deformed bar prestressed concrete supporting pile structure; and concrete is poured into the poured concrete pile hole 1.
The construction method of the PSB finish-rolled deformed steel bar prestressed concrete support pile structure comprises the following steps:
(1) measuring line
Positioning a cast-in-place concrete pile body for foundation pit support in a field by adopting a GPS (global positioning system) or a total station, and determining the position of a PSB (prestressed concrete pile) finish-rolled deformed steel bar prestressed concrete supporting pile structure;
(2) ready-to-pour concrete pile hole 1
Mechanically or manually forming holes, and then performing ultra-drilling for 100-300 mm after the hole forming depth reaches the design depth to form a cast-in-place concrete pile hole 1;
(3) fabrication of reinforcement cage
Obtaining the reinforcement amount of a supporting pile (round pile) according to calculation, manufacturing a constructional reinforcement cage by using HRB (high-resolution steel) common reinforcements 8 and stirrups 9 in a cast-in-place concrete pile hole 1, and uniformly arranging PSB finish-rolled threaded reinforcements 2 in the constructional reinforcement cage, wherein one end, close to the bottom end of a pile body, of the PSB finish-rolled threaded reinforcements 2 is fixed in the constructional reinforcement cage through a fixing part 6;
(4) pressure-cast concrete
Pouring concrete into the poured concrete pile hole 1, wherein the concrete has good workability, and the mixing proportion is determined by tests; the slump is preferably 180-220 mm; the sand content of the poured concrete is preferably 40 to 50 percent, and medium coarse sand is preferably selected; the maximum grain diameter of the coarse aggregate is less than 40 mm; the cast concrete is preferably blended with additives. Fixing the position of the thin steel pipe 5, ensuring that the PSB finish rolling twisted steel 2 passes through an internal channel of the thin steel pipe 5, and pouring a concrete cushion 4 and a bearing body 3;
(5) prestressing by post-tensioning
After the strength of the pile body concrete reaches over 75 percent, arranging a tension anchoring piece 7 on the PSB finish rolling deformed steel bar 2, locking the PSB finish rolling deformed steel bar 2 by the tension anchoring piece 7, applying prestress to a PSB finish rolling deformed steel bar prestressed concrete support pile structure, and pouring cement slurry into an internal channel of a thin steel pipe 5 to realize compression of the concrete pile body, so that the pile body has bending resistance, tensile resistance and crack resistance; in the foundation pit supporting engineering with horizontal stress, the bending strength of the pile body is increased, and the displacement of the foundation pit can be effectively controlled.
Claims (6)
1. A PSB finish-rolled deformed steel bar prestressed concrete support pile structure is characterized by comprising a cast-in-place concrete pile hole, a structural reinforcement cage, a bearing body, a concrete cushion layer, a plurality of tensioning anchors, a plurality of fixing parts and a plurality of PSB finish-rolled deformed steel bars, wherein the cast-in-place concrete pile hole is arranged in a side wall soil body needing foundation pit support;
the structure steel bar cage consists of HRB common steel bars and stirrups, the PSB finish rolling threaded steel bar is cylindrical, and the fixing part is arranged at the lower end of the PSB finish rolling threaded steel bar and is used for fixedly connecting the structure steel bar cage with the PSB finish rolling threaded steel bar; the structural reinforcement cage and the PSB finish rolling threaded steel bar are arranged in a cast-in-place concrete pile hole; the PSB finish rolling twisted steel penetrates through the upper end face of the cast-in-place concrete pile hole;
the concrete cushion layer is arranged at the upper end part of the cast-in-place concrete pile hole, the bearing body is arranged on the upper end surface of the concrete cushion layer, the PSB finish-rolled deformed steel bar penetrates through the concrete cushion layer and the bearing body, the tensioning anchoring part is arranged on the upper end surface of the bearing body, the tensioning anchoring part is fixedly connected with the PSB finish-rolled deformed steel bar, and the tensioning anchoring part is used for locking the PSB finish-rolled deformed steel bar and applying prestress to a PSB finish-rolled deformed steel bar prestressed concrete support pile structure; and concrete is poured into the hole of the cast-in-place concrete pile.
2. The PSB finish-rolled deformed steel bar prestressed concrete support pile structure as recited in claim 1, wherein said PSB finish-rolled deformed steel bars are uniformly arranged in the structural reinforcement cage along the axial direction of the pile hole of the cast-in-place concrete.
3. The PSB finish-rolled deformed steel bar prestressed concrete support pile structure as recited in claim 2, wherein said PSB finish-rolled deformed steel bars and HRB ordinary steel bars are arranged in a staggered manner.
4. The PSB finish-rolled deformed steel bar prestressed concrete support pile structure of claim 1, wherein the diameter of the pile hole of the cast-in-place concrete is greater than or equal to 500mm, and mechanical or manual hole forming is adopted.
5. The PSB finish-rolled deformed steel bar prestressed concrete support pile structure as claimed in claim 1, wherein the PSB finish-rolled deformed steel bar has an external thread on its outer circumferential surface, the tension anchor member has an internal thread hole therein, the internal thread hole is engaged with the external thread on the outer circumferential surface of the PSB finish-rolled deformed steel bar, and the tension anchor member is fixedly connected with the PSB finish-rolled deformed steel bar by a threaded connection.
6. The PSB finish-rolled deformed steel bar prestressed concrete support pile structure as recited in claim 1, wherein said PSB finish-rolled deformed steel bar prestressed concrete support pile structure further comprises a plurality of thin steel pipes, said thin steel pipes having passages for PSB finish-rolled deformed steel bars to pass through, said thin steel pipes being disposed inside and penetrating through said concrete cushion layer and said supporting body; and cement slurry is poured into the channel of the thin steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021668889.8U CN213897088U (en) | 2020-08-12 | 2020-08-12 | PSB finish rolling screw-thread steel prestressed concrete fender pile structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021668889.8U CN213897088U (en) | 2020-08-12 | 2020-08-12 | PSB finish rolling screw-thread steel prestressed concrete fender pile structure |
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| CN213897088U true CN213897088U (en) | 2021-08-06 |
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| CN202021668889.8U Active CN213897088U (en) | 2020-08-12 | 2020-08-12 | PSB finish rolling screw-thread steel prestressed concrete fender pile structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370051A (en) * | 2021-12-22 | 2022-04-19 | 江苏海洋大学 | Post-tensioned unbonded supporting pile capable of repeatedly utilizing prestressed reinforcement |
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2020
- 2020-08-12 CN CN202021668889.8U patent/CN213897088U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370051A (en) * | 2021-12-22 | 2022-04-19 | 江苏海洋大学 | Post-tensioned unbonded supporting pile capable of repeatedly utilizing prestressed reinforcement |
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