CN113152535B - Rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method and assembly used in same - Google Patents
Rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method and assembly used in same Download PDFInfo
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- CN113152535B CN113152535B CN202110444077.8A CN202110444077A CN113152535B CN 113152535 B CN113152535 B CN 113152535B CN 202110444077 A CN202110444077 A CN 202110444077A CN 113152535 B CN113152535 B CN 113152535B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/56—Screw piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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Abstract
The application relates to a rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method and a combination body used in the method. This application adopts the rig pore-forming cast in place concrete at first, adopts the hammer pipe to insert appointed elevation position in the concrete pile body behind the combination body that will be equipped with the unbonded steel strand wires before the concrete initial set, then adopts crane or rig alignment concrete pile body in the unbonded steel strand wires, at last with the stretch-draw locking of unbonded steel strand wires in basic inside or basic upper portion. The application adopts the post-inserting process, the construction speed is high, the operation is simple and convenient, the construction quality is good, the pile body pulling resistance bearing capacity is high, meanwhile, the bearing member can be prefabricated, and the quality is reliable. Compared with the common uplift pile, the pile body crack problem does not need to be considered, the consumption of main materials is less, and the manufacturing cost is low; compare with anti-floating anchor rod, this application pile shaft material adopts the concrete, and is more reliable than grout or the mortar quality that anti-floating anchor rod adopted, and main material protective layer thickness is big, and the durability is better.
Description
Technical Field
The application relates to anti-floating design and construction of buildings, municipal works, underground works and high-rise structures in construction engineering, in particular to a construction method of a back-inserted unbonded steel strand pressure-bearing uplift pile.
Background
At present, the main treatment methods for solving the anti-floating problem of the underground structure comprise an anti-floating plate method, a ballast method, a drainage pressure limiting method, a water-resisting pressure control method, a water drainage pressure reduction method, an anti-floating anchor rod method, an anti-uplift pile method and the like. In practical engineering, the uplift pile method or the uplift anchor rod method is the most commonly used method for solving the problems of foundation uplift and foundation uplift.
For a common uplift pile, a long spiral drilling machine, a rotary drilling machine and other equipment are generally adopted to form a hole and pour concrete to form a pile, a reinforcement cage is arranged in a pile body, the pile body concrete is in a tensioned state in a working state, and the pile body reinforcement ratio is generally controlled by checking the width of a pile body concrete crack during design, so that the common uplift pile is high in pile body reinforcement ratio and high in manufacturing cost.
For the anti-floating anchor rod, the rod body is generally made of cement paste or mortar, a small reinforcement cage or a steel strand is arranged in the rod body, and the rod body has small diameter and small protective layer of stressed reinforcement or steel strand, so that the anchor rod is easily corroded by underground water to cause poor durability, and meanwhile, the quality of the cement paste or the mortar is not easy to control, so that the strength of the rod body is easily caused to not meet the design requirement. According to the relevant standard requirements, when the anti-floating anchor rod is adopted for anti-floating treatment, the checking requirement on the width of the crack of the rod body of the anti-floating anchor rod is strict, so that the reinforcement rate of the rod body is high, and the manufacturing cost is high.
Disclosure of Invention
In order to solve the problems and the defects of the conventional uplift pile and the conventional anti-floating anchor rod, the application provides a back-inserted unbonded steel strand pressure bearing type uplift pile construction method and a combination body used by the same. Meanwhile, the pile body concrete of the uplift pile is in a pressed state in a working state, the checking calculation of the width of the concrete crack of the pile body is not needed, and the problem that flexible materials such as unbonded steel stranded wires and the like are installed after the pile body concrete of the uplift pile is poured can be solved through the post-inserting process of the construction method. At present, no related technology for inserting flexible materials such as unbonded steel strands into concrete cast-in-place piles is available in related industries such as building engineering, municipal engineering and underground engineering.
In a first aspect, the construction method for the back-inserted unbonded steel strand pressure-bearing type uplift pile provided by the application adopts the following technical scheme:
the first scheme is as follows:
a rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method is characterized in that a drilling machine is adopted to form holes and pour concrete to form a concrete pile body, then unbonded steel strands penetrate into a hammer pipe or are temporarily fixed on the outer side of the hammer pipe, a combined body formed by the unbonded steel strands and a prefabricated concrete combined component is inserted into a specified elevation position in the concrete pile body through the hammer pipe before concrete is initially set, and after the concrete strength grade of the pile body reaches design requirements, the unbonded steel strands are locked in the foundation or on the upper part of the foundation or on the top of the uplift pile through an anchor plate and an anchor.
The back-inserted unbonded steel strand pressure-bearing uplift pile comprises a concrete pile body, an unbonded steel strand and a prefabricated concrete combined member combination body.
The combined body formed by the unbonded steel stranded wires and the precast concrete combined member is a precast member and comprises unbonded steel stranded wires, a precast concrete conical body, a guide device, a positioning device, an anchor plate and an anchorage device. The upper part of the precast concrete combined component is cylindrical or cuboid, and the diameter or the side length is 130mm-900 mm; the lower part adopts a conical shape; the height of the precast concrete combined member is 30cm-150cm, and the strength grade of the concrete is C30-C60.
Optionally, a spiral stirrup with the diameter of 6-12mm can be arranged inside the precast concrete combined member.
The construction of the back-inserted unbonded steel strand pressure-bearing uplift pile adopts a combined construction process formed by drilling holes by a drilling machine, pouring concrete, forming the pile, inserting the unbonded steel strand and prefabricating a concrete combined member.
Before the back inserting process is implemented, the unbonded steel stranded wire penetrates into the hammer pipe or is temporarily fixed on the outer side of the hammer pipe.
The surface of the unbonded steel strand is coated with an anticorrosive lubricating coating, is externally coated with a sheath, and can freely slide in the sheath.
The diameter of the concrete pile body is equal along the length direction, the concrete strength grade is C25-C60, the concrete slump is 120-240 mm, and the pile forming diameter is 150-1000 mm.
The guide device is arranged on the upper part of the precast concrete combined member and adopts a steel bar, a steel pipe, a steel plate or an assembly of an annular steel plate, the steel bar and the steel pipe.
The positioning devices are uniformly distributed on the outer side of the precast concrete combined member or the hammer pipe, and the positioning devices adopt reinforcing steel bars, steel plates or concrete members.
After the assembly formed by the unbonded steel stranded wires and the precast concrete combined member is in place in the concrete pile body, straightening the unbonded steel stranded wires in the concrete pile body by using a crane or a drilling machine, fixing the unbonded steel stranded wires exposed out of the pile top on the straightening support, and removing the straightening support after the concrete is finally set.
And after straightening the unbonded steel strand, applying prestress to stretch and lock the unbonded steel strand in the foundation or at the upper part of the foundation or at the top of the uplift pile.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the prefabricated concrete combined member is adopted, so that the quality is reliable, and the self compression-resistant bearing capacity is high;
2. the anchor plate and the anchorage device are arranged in the precast concrete combined component, pile body concrete is wrapped outside the precast concrete combined component, the anchor plate and the anchorage device are equivalently protected doubly, meanwhile, the unbonded steel stranded wire is placed in the concrete pile body, the thickness of the protective layer is large, the corrosion action of underground water and the like can be well resisted, and the durability is good;
3. the anchor plate is arranged in the precast concrete combined component, the compression strength of the bearing surface of the anchor plate is very high, meanwhile, the precast concrete combined component is arranged in the concrete pile body, and the concrete of the pile body has very strong constraint force on the precast concrete combined component;
4. install guider and positioner on the precast concrete combined member, can guarantee that the assembly that unbonded steel strand wires and precast concrete combined member formed can insert down and target in place and guarantee to set up placed in the middle in the pile body.
Scheme II:
a rear-inserted unbonded steel strand bearing type uplift pile construction method is characterized in that a drilling machine is adopted to form holes and pour concrete to form a concrete pile body, then unbonded steel strands penetrate into a hammer pipe or are temporarily fixed on the outer side of the hammer pipe, a combined body formed by unbonded steel strands and a bearing member is inserted into a designated elevation position in the concrete pile body through the hammer pipe before concrete is initially set, and after the concrete strength grade of the pile body reaches design requirements, the unbonded steel strands are tensioned and locked in the interior of a foundation or on the upper portion of the foundation through an anchor plate and an anchorage device.
The back-inserted unbonded steel strand pressure-bearing uplift pile comprises a concrete pile body, an unbonded steel strand and a pressure-bearing member.
The pressure-bearing member is a steel structure pressure-bearing member and a U-shaped surrounding pressure-bearing member. The steel structure pressure-bearing member comprises a guide device, an anchor plate, an anchor device, a limiting plate and a conical tip; the limiting plate is connected with the anchor plate and the anchorage device through bolts or welded through steel bars and steel pipes; the cone tip is made of steel bars, steel plates or high polymer materials. The U-shaped surrounding pressure-bearing member is made of high polymer materials, steel members or a combination of the high polymer materials and the steel members.
The construction of the back-inserted unbonded steel strand pressure-bearing uplift pile adopts a combined construction process formed by drilling holes by a drilling machine, pouring concrete into the holes, forming the pile, inserting the unbonded steel strand and the pressure-bearing member.
Before the back inserting process is implemented, the unbonded steel stranded wire penetrates into the hammer pipe or is temporarily fixed on the outer side of the hammer pipe through a temporary fixing device.
The surface of the unbonded steel strand is coated with an anticorrosive lubricating coating, is externally coated with a sheath, and can freely slide in the sheath.
The diameter of the concrete pile body is equal along the length direction, the concrete strength grade is C25-C60, the concrete slump is 120-240 mm, and the pile forming diameter is 150-1000 mm.
The guide device is arranged on the upper part of the pressure-bearing member and adopts a steel bar, a steel plate or an assembly of an annular steel plate, the steel bar and a steel pipe.
The positioning devices are uniformly arranged on the outer sides of the pressure-bearing members or the hammer pipes, and the positioning devices are made of steel bars, steel plates or concrete members.
After the assembly formed by the unbonded steel stranded wires and the bearing member is in place in the concrete pile body, straightening the unbonded steel stranded wires in the concrete pile body by using a crane or a drilling machine, fixing the unbonded steel stranded wires exposed out of the pile top on the straightening support, and removing the straightening support after the concrete is finally set.
And after straightening the unbonded steel strand, applying prestress to stretch and lock the anchoring length of the unbonded steel strand in the foundation or at the upper part of the foundation or at the top of the uplift pile.
In a second aspect, the application provides a combination of unbonded steel stranded wires and precast concrete combined members, which comprises unbonded steel stranded wires, a precast concrete conical body, a guide device for temporarily fixing the end part of a hammer pipe, an anchor plate, an anchor device and a positioning device for preventing the combination from deviating from the center of a concrete pile body; the lower parts of the unbonded steel strands are locked in the precast concrete combined member through the anchor plate and the anchorage device.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the uplift pile construction adopts the process of inserting the unbonded steel stranded wire after the hammer pipe, and has reliable construction quality, high construction speed and simple and convenient operation;
2. the uplift pile adopts unbonded steel stranded wires, is pressure-bearing, does not need to check the width of a crack of a pile body, can save a large amount of steel compared with the common uplift pile, and has low manufacturing cost;
3. the pile body of the uplift pile is made of concrete, the quality is guaranteed, the thickness of the main material protective layer is large, and the durability is good.
4. The uplift pile is a combination body formed by the unbonded steel stranded wires and the precast concrete combined members, so that the quality is reliable, and the self-compression bearing capacity is high; the durability is good; the assembly is accurately positioned.
Drawings
FIG. 1 is a diagram showing the relationship between the construction positions of a hammer pipe and a combination of unbonded steel strands and precast concrete combined members (the unbonded steel strands penetrate into the hammer pipe);
FIG. 2 is a diagram showing the relationship between the construction positions of the hammer tube and the combination of the unbonded steel stranded wires and the precast concrete combined member (the unbonded steel stranded wires are fixed on the outer side of the hammer tube);
FIG. 3 is a diagram showing the combined construction position of the hammer pipe and the unbonded steel stranded wire and the steel structure bearing member (the unbonded steel stranded wire penetrates into the hammer pipe);
FIG. 4 is a diagram showing the combined construction position of the hammer tube and the unbonded steel stranded wires and the steel structure bearing member (the unbonded steel stranded wires are fixed on the outer side of the hammer tube);
FIG. 5 is a diagram showing the combined construction positions of the hammer pipe, the unbonded steel stranded wire and the U-shaped surrounding pressure-bearing member (the unbonded steel stranded wire penetrates into the hammer pipe);
FIG. 6 is a diagram showing the combined construction position of the hammer tube, the unbonded steel stranded wires and the U-shaped surrounding pressure-bearing member (the unbonded steel stranded wires are fixed on the outer side of the hammer tube);
fig. 7 is a schematic cross-sectional view of a pressure-bearing uplift pile;
fig. 8 is a schematic view of the guide structure.
Description of reference numerals: 1-concrete pile body, 2-unbonded steel strand, 3-precast concrete combined member, 4-precast concrete conical body, 5-guiding device, 6-positioning device, 71-anchor plate and anchor device, 72-anchor plate and anchor device, 8-vibration or pressurization device, 9-hammer pipe, 10-bearing member, 11-limiting plate, 12-cone tip and 13-temporary fixing device.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
The embodiment of the application discloses a method for constructing a pressure-bearing type uplift pile by inserting a non-adhesive steel strand at the back.
Referring to fig. 1-8, the components included are: the concrete pile comprises a concrete pile body 1, unbonded steel strands 2, a precast concrete combined member 3, a precast concrete conical body 4, a guide device 5, a positioning device 6, an anchor plate and an anchor 71, an anchor plate and an anchor 72, a vibration or pressurizing device 8, a hammer pipe 9, a pressure-bearing member 10, a limiting plate 11, a cone tip 12 and a temporary fixing device 13.
The surface of the unbonded steel strand 2 is coated with an anticorrosive lubricating coating, is externally coated with a sheath, and can freely slide in the sheath.
The precast concrete combined member 3 comprises a precast concrete conical body 4, a guide device 5, a positioning device 6, an anchor plate and an anchor 71. The lower parts of the unbonded steel strands 2 are locked in the precast concrete combined member 3 through anchor plates and anchors 71; the guide device 5 is arranged on the upper part of the precast concrete combined component 3, and the guide device 5 adopts a steel bar, a steel pipe, a steel plate or a combined piece of an annular steel plate, the steel bar and the steel pipe; the positioning device 6 is arranged on the outer side of the precast concrete combined component 3 or the hammer pipe 9, and can ensure that a combined body formed by the unbonded steel strand 2 and the precast concrete combined component 3 is located at a central position in the concrete pile body 1. The positioning device 6 adopts a steel bar, a steel plate or a concrete member.
The bearing member 10 is a steel structure bearing member or a U-shaped surrounding bearing member. The steel structure pressure-bearing member comprises a guide device 5, an anchor plate and an anchor 71, a limiting plate 11 and a conical tip 12; the limiting plate 11 is connected with the anchor plate and the anchorage device 71 through bolts or welded through steel bars and steel pipes; the cone tip 12 is made of steel bars, steel plates or high polymer materials. The U-shaped surrounding pressure-bearing member is made of high polymer materials, steel members or a combination of the high polymer materials and the steel members.
The temporary fixing device 13 is arranged at the upper part of the hammer pipe 9 and is mainly used for temporarily fixing the unbonded steel stranded wire 2 at the outer side of the hammer pipe 9.
Referring to fig. 1 to 6, the unbonded steel stranded wires 2 on the upper part of the combination formed by the unbonded steel stranded wires 2 and the precast concrete combined member 3 or the combination formed by the unbonded steel stranded wires 2 and the bearing member 10 penetrate into the hammer tube 9 or are temporarily fixed on the outer side of the hammer tube 9 through the temporary fixing device 13, and meanwhile, the end part of the hammer tube 9 is temporarily fixed on the guide device 5, so that the combination can be temporarily fixed on the hammer tube 9, and the hammer tube can be ensured to be inserted into the concrete pile body 1 after driving the combination.
Referring to fig. 1-7, before the concrete is initially set, a hammer pipe 9 is driven by a vibration or pressurizing device 8 to insert a combined body formed by an unbonded steel strand 2 and a precast concrete combined member 3 or a combined body formed by the unbonded steel strand 2 and a pressure-bearing member 10 into a specified elevation position in a concrete pile body 1, then a crane or a drilling machine is used for straightening the unbonded steel strand 2 in the concrete pile body 1, the unbonded steel strand 2 exposed out of the pile top is fixed on a straightening support, and the straightening support is removed after the concrete is finally set. When the strength grade of the pile body concrete reaches the design requirement, the unbonded steel strand 2 is tensioned and locked in the foundation or on the upper part of the foundation or on the top of the uplift pile through the anchor plate and the anchorage device 72.
The embodiment also discloses a combination of the unbonded steel strand and the precast concrete combined member, which comprises an unbonded steel strand 2, a precast concrete conical body 4, a guide device 5, an anchor plate and an anchorage device 71 and a positioning device 6 for preventing the combination from deviating from the center of the concrete pile body 1.
The lower part of the unbonded steel strand 2 is locked inside the precast concrete combined member 3 through an anchor plate and an anchor device 71. The guide device 5 is installed on the upper portion of the precast concrete combined component 3, the guide device 5 is a combined piece of a steel bar, a steel pipe, a steel plate or an annular steel plate, the steel bar and the steel pipe, the guide device 5 is used for temporarily fixing the end portion of the hammer pipe 9, and the positioning device 6 is fixed on the outer side of the precast concrete combined component 3 or the outer side of the hammer pipe 9, so that the combined body formed by the unbonded steel strand 2 and the precast concrete combined component 3 can be located in the central position in the concrete pile body 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 rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method is characterized in that: firstly, processing a combination of an unbonded steel strand (2) and a precast concrete combined member (3); step two, adopting a drilling machine to form a hole and pouring concrete to form a concrete pile body (1); thirdly, penetrating the unbonded steel strand (2) into the hammer pipe (9) or temporarily fixing the unbonded steel strand on the outer side of the hammer pipe (9); inserting the combined body of the unbonded steel strand (2) and the prefabricated concrete combined member (3) into a specified elevation position in the concrete pile body (1) through a hammer pipe (9) before the initial setting of the concrete; fifthly, straightening the unbonded steel strand (2) in the concrete pile body (1); step six, after the strength grade of the pile body concrete reaches the design requirement, the unbonded steel strand (2) is tensioned and locked in the foundation or on the upper part of the foundation or on the top of the uplift pile through the anchor plate and the anchorage device (72) at the top; the back-inserted unbonded steel strand pressure-bearing uplift pile comprises a concrete pile body (1), an unbonded steel strand (2) and a prefabricated concrete combined member (3) to form a combined body;
the assembly formed by the unbonded steel stranded wires (2) and the precast concrete combined member (3) is a precast member, wherein the precast concrete combined member (3) comprises a precast concrete conical body (4), a guide device (5) for temporarily fixing the end part of a hammer pipe (9), a positioning device (6) for preventing the assembly from deviating from the center of a concrete pile body (1), an anchor plate at the bottom and an anchorage device (71), the lower part of the unbonded steel stranded wires (2) is locked in the precast concrete combined member (3) through the anchor plate at the bottom and the anchorage device (71), the upper part of the precast concrete combined member (3) is cylindrical or rectangular, the diameter or side length is 130mm-900mm, and the lower part of the precast concrete combined member is conical; the height of the precast concrete combined member is 30cm-150cm, and the strength grade of the concrete is C30-C60.
2. The method for constructing the post-inserted unbonded steel strand pressure-bearing type uplift pile according to claim 1, which is characterized in that: the uplift pile construction adopts a combined construction process formed by inserting the unbonded steel stranded wires (2) and the precast concrete combined members (3) after a drilling machine forms holes and pours concrete into piles.
3. The method for constructing the post-inserted unbonded steel strand pressure-bearing type uplift pile according to claim 1, which is characterized in that: the concrete pile body (1) is equal in diameter along the length direction, the concrete strength grade is C25-C60, the concrete slump is 120-240 mm, and the pile forming diameter is 150-1000 mm.
4. The method for constructing the post-inserted unbonded steel strand pressure-bearing type uplift pile according to claim 1, which is characterized in that: the guide device (5) is arranged on the upper part of the precast concrete combined component (3), and the guide device (5) adopts a steel bar, a steel pipe, a steel plate or an assembly of an annular steel plate, the steel bar and the steel pipe.
5. The method for constructing the post-inserted unbonded steel strand pressure-bearing type uplift pile according to claim 1, which is characterized in that: the positioning devices (6) are uniformly arranged on the outer side of the precast concrete combined component (3) or the outer side of the hammer pipe (9), and the positioning devices (6) adopt steel bars, steel plates or concrete components.
6. The method for constructing the post-inserted unbonded steel strand pressure-bearing type uplift pile according to claim 1, which is characterized in that: after the assembly formed by the unbonded steel stranded wires (2) and the precast concrete combined member (3) is in place in the concrete pile body (1), straightening the unbonded steel stranded wires (2) in the concrete pile body (1) by using a crane or a drilling machine, preliminarily fixing the unbonded steel stranded wires (2) exposed out of the pile top on a straightening support, and removing the straightening support after the concrete is finally set.
7. The method for constructing the post-inserted unbonded steel strand pressure-bearing type uplift pile according to claim 1, which is characterized in that: during foundation construction, prestress is applied to stretch and lock the straightened unbonded steel strand (2) in the foundation or on the upper part of the foundation or on the top of the uplift pile.
8. The method for constructing the post-inserted unbonded steel strand pressure-bearing type uplift pile according to claim 1, which is characterized in that: the inside of the precast concrete combined component (3) is provided with a spiral stirrup, and the diameter of the spiral stirrup is 6-16 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110444077.8A CN113152535B (en) | 2021-04-23 | 2021-04-23 | Rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method and assembly used in same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110444077.8A CN113152535B (en) | 2021-04-23 | 2021-04-23 | Rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method and assembly used in same |
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| CN113152535B true CN113152535B (en) | 2022-02-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942833A (en) * | 2010-09-30 | 2011-01-12 | 建研地基基础工程有限责任公司 | Frameless unbonded post-tensioned prestressed uplift filling pile and construction method thereof |
| CN102418339A (en) * | 2011-09-28 | 2012-04-18 | 上海强劲地基工程股份有限公司 | Novel energy-saving anti-floating pile |
| CN102787595A (en) * | 2012-08-16 | 2012-11-21 | 岳建伟 | Double-acting self-stressing combined uplift pile and pile forming method |
-
2021
- 2021-04-23 CN CN202110444077.8A patent/CN113152535B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942833A (en) * | 2010-09-30 | 2011-01-12 | 建研地基基础工程有限责任公司 | Frameless unbonded post-tensioned prestressed uplift filling pile and construction method thereof |
| CN102418339A (en) * | 2011-09-28 | 2012-04-18 | 上海强劲地基工程股份有限公司 | Novel energy-saving anti-floating pile |
| CN102787595A (en) * | 2012-08-16 | 2012-11-21 | 岳建伟 | Double-acting self-stressing combined uplift pile and pile forming method |
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| CN113152535A (en) | 2021-07-23 |
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