CN215759001U - Cast-in-place pile casing device capable of avoiding pile cutting head - Google Patents
Cast-in-place pile casing device capable of avoiding pile cutting head Download PDFInfo
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- CN215759001U CN215759001U CN202121886798.6U CN202121886798U CN215759001U CN 215759001 U CN215759001 U CN 215759001U CN 202121886798 U CN202121886798 U CN 202121886798U CN 215759001 U CN215759001 U CN 215759001U
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Abstract
A cast-in-place pile casing device without cutting a pile head comprises an outer casing, an inner casing and an overflow switch; the outer protective cylinder is in a circular truncated cone shape and comprises an outer protective cylinder top outer ring, fixed steel bars, an outer protective cylinder bottom outer ring, a lower cutting plate and an outer protective cylinder bottom inner ring, wherein the outer protective cylinder bottom outer ring and the outer protective cylinder bottom inner ring are uniformly welded and fixed through the fixed steel bars, and the lower cutting plate is arranged at the bottom of the outer protective cylinder; the inner protecting cylinder is cylindrical, an inner protecting cylinder overflow port is formed in the pipe wall, and overflow switch limiting plates are arranged on the outer wall of the inner protecting cylinder and the lower part of an inner protecting cylinder overflow hole; the overflow switch is in a ring shape, the diameter of the overflow switch is the same as the outer diameter of the inner protective cylinder, an overflow opening of the overflow switch is arranged on the pipe wall, and an inserting rod is arranged on the overflow switch. The pile casing device is adopted to avoid the collection and discharge of slurry after slurry pore-forming during cast-in-place pile pouring; the cast-in-situ bored pile avoids forming an over-grouting part when being poured, can save the pile head over-grouting part pile cutting process, saves the construction cost and the construction period, and is simple and convenient to operate.
Description
The technical field is as follows:
the utility model belongs to the technical field of foundation construction of building engineering, particularly relates to the technical field of construction of cast-in-place piles of building engineering, particularly relates to construction of urban building foundations, and particularly relates to a cast-in-place pile casing device without cutting pile heads.
Background art:
at present, two construction modes of cast-in-situ bored piles are commonly used in constructional engineering, one is a slurry retaining wall cast-in-situ bored pile, and the other is a sleeve type cast-in-situ bored pile. The construction of the slurry retaining wall cast-in-place pile is that after the pile is positioned and installed by a drilling machine, a retaining cylinder is embedded at the position of a required drilling hole to prevent the hole wall from collapsing, the slurry is used for protecting the hole wall during drilling, and after the drilling is finished, hole cleaning, steel reinforcement cage placement, concrete pouring, concrete curing and pile cutting are carried out on the concrete of the super-cast part. The sleeve type cast-in-situ bored pile is positioned and installed through a drilling machine, a hole is drilled after the sleeve type cast-in-situ bored pile is pressed into the steel sleeve, wall protection is carried out through the steel sleeve, the hole cleaning process is not needed for the sleeve type cast-in-situ bored pile, and the pile cutting is still needed for the concrete of the over-cast part after the construction and the pouring of the sleeve type cast-in-situ bored pile are finished. The pile forming quality of the cast-in-situ bored pile is greatly influenced by construction, the concrete quality is difficult to control, the pile head interception easily causes damage to the stability of the pile body, and the pile head treatment wastes labor cost and time. In view of this, through designing a bored concrete pile casing, effectively avoid cutting the novel drilling bored concrete pile of stake, have very high application prospect and spreading value.
The utility model has the following contents:
the utility model aims to solve the technical problem of providing a cast-in-place pile casing device without cutting a pile head, which effectively avoids cutting the pile head by designing the cast-in-place pile casing, ensures that the construction quality of the cast-in-place pile meets the requirement, and simultaneously can save the construction cost and the construction time.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a cast-in-place pile casing device without cutting a pile head, which comprises a double-layer steel casing and an overflow switch, wherein the double-layer steel casing comprises an outer casing and an inner casing; the outer protective cylinder is in a circular truncated cone shape and comprises an outer protective cylinder top outer ring, fixed steel bars, an outer protective cylinder bottom outer ring, a lower cutting plate and an outer protective cylinder bottom inner ring, wherein the outer protective cylinder bottom outer ring and the outer protective cylinder bottom inner ring are uniformly welded and fixed through the fixed steel bars, and the lower cutting plate is arranged at the bottom of the outer protective cylinder; the inner protecting cylinder is cylindrical and is inserted into the inner ring at the bottom of the outer protecting cylinder, an inner protecting cylinder overflow port is formed in the pipe wall, and overflow switch limiting plates are arranged on the outer wall of the inner protecting cylinder and the lower part of an inner protecting cylinder overflow hole; the overflow switch is annular and is sleeved on the inner protective cylinder, the diameter of the overflow switch is the same as the outer diameter of the inner protective cylinder, an overflow opening of the overflow switch is formed in the pipe wall, and an inserting rod is arranged on the overflow switch.
The outer protective cylinder is formed by welding Q235 hot-rolled coils with the thickness of 15 mm.
The inner ring at the bottom of the outer protective cylinder is formed by welding phi 25 steel bars.
And the outer ring at the bottom of the outer protecting cylinder and the inner ring at the bottom of the outer protecting cylinder are uniformly welded and fixed by adopting phi 25 fixed steel bars.
The bottom of the outer protective cylinder is provided with a lower cutting plate with the height of 100 mm.
The inner protective cylinder is formed by welding Q235 hot-rolled coils with the thickness of 12 mm.
The pipe wall of the inner protective cylinder is provided with 4 inner protective cylinder overflow ports which are symmetrically and uniformly distributed, and the height of each opening is 120 mm.
And overflow switch limiting plates are arranged on the outer wall of the inner protecting cylinder and 20mm below an overflow hole of the inner protecting cylinder.
The height of the overflow switch is 130mm, and the overflow switch is made of a Q235 round steel plate with the thickness of 12 mm.
And 4 overflow switch overflow ports with the same size as the inner protection cylinder overflow ports are formed in the wall of the overflow switch pipe.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model discloses a structural design process of a cast-in-place pile casing device without cutting a pile head, which is adopted to avoid the collection and discharge of slurry after slurry hole forming during cast-in-place pile casting; the cast-in-situ bored pile avoids forming an over-grouting part when being poured, can save the pile head over-grouting part pile cutting process, saves the construction cost and the construction period, and is simple and convenient to operate.
2. According to the utility model, in order to conveniently pull out the outer protective cylinder in the later period, the bottom plate and the top plate are not arranged between the outer protective cylinder and the inner protective cylinder, the outer ring and the inner ring at the bottom of the outer protective cylinder are uniformly welded and fixed by adopting the steel bars, and after concrete overflows to the outer protective cylinder, the concrete flows onto a soil layer through gaps among the steel bars, can be used for tamping a soil body and used as a foundation cushion layer, and does not need secondary cleaning.
3. The overflow switch is provided with 4 overflow ports with the same size as the overflow ports of the inner protective barrel, the height of the overflow switch is 130mm, the overflow switch is made of Q235 circular steel plates, the overflow switch is opened and closed through rotating the inserting rod and is used separately from the outer protective barrel, and the closing of the overflow switch does not affect the outer protective barrel, so that the outer protective barrel can be kept stable.
Description of the drawings:
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of an outer shroud of the present invention;
FIG. 3 is a schematic view of the construction of the inner sheath of the present invention;
fig. 4 is a schematic diagram of the overflow switch structure of the present invention.
Reference numerals:
1-outer protective cylinder, 2-inner protective cylinder and 3-overflow switch.
1.1-top outer ring of outer protective cylinder, 1.2-fixed steel bar, 1.3-bottom outer ring of outer protective cylinder, 1.4-lower cutting plate,
1.5-inner ring at the bottom of the outer protective cylinder.
2.1-an overflow switch limiting plate and 2.2-an inner protective cylinder overflow port.
3.1-inserted rod, 3.2-overflow switch overflow port.
The specific implementation mode is as follows:
the present invention is further described below in conjunction with the following detailed description, which is intended to further illustrate the principles of the utility model and is not intended to limit the utility model in any way, but is equivalent or similar to the present invention without departing from its scope.
Referring to fig. 1-4, the utility model provides a cast-in-place pile casing device without cutting a pile head, which comprises a double-layer steel casing and an overflow switch 3, wherein the double-layer steel casing comprises an outer casing 1 and an inner casing 2.
The outer protective cylinder 1 is in a circular truncated cone shape and is formed by welding Q235 hot-rolled coils with the thickness of 15mm, and comprises an outer ring 1.1 at the top of the outer protective cylinder, fixed steel bars 1.2, an outer ring 1.3 at the bottom of the outer protective cylinder, a lower cutting plate 1.4 and an inner ring 1.5 at the bottom of the outer protective cylinder. The outer protecting cylinder bottom inner ring 1.5 is formed by welding phi 25 steel bars, and the phi 25 fixed steel bars 1.2 are uniformly welded and fixed between the outer protecting cylinder bottom outer ring 1.3 and the outer protecting cylinder bottom inner ring 1.5. An undercut plate 1.4 with the height of 100mm is arranged at the bottom of the outer protective barrel 1 and used for undercutting soil when the outer protective barrel 1 is buried and fixing the outer protective barrel 1.
The inner protective cylinder 2 is cylindrical, is inserted into an inner ring 1.5 at the bottom of the outer protective cylinder 1, is formed by welding a Q235 hot-rolled coil plate with the thickness of 12mm, is provided with 4 inner protective cylinder overflow ports 2.2 which are symmetrically and uniformly distributed on the tube wall, has the height of a hole of 120mm, and is provided with an overflow switch limiting plate 2.1 at the position of 20mm below the inner protective cylinder 2 outer wall and the inner protective cylinder overflow hole 2.2 so as to position the overflow switch 3. An inner pile casing overflow port 2.2 is arranged on the inner pile casing 2, the bottom elevation of the inner pile casing overflow port 2.2 is the pile top elevation, and slurry and super-poured concrete are discharged to the outer pile casing 1 through the orifice, so that the slurry is prevented from being collected and discharged after the slurry is formed into a hole; the over-grouting part is avoided being formed when the cast-in-situ bored pile is poured, and the pile head over-grouting part pile cutting procedure can be omitted.
The overflow switch 3 is annular and is sleeved on the inner protective barrel 2, the diameter of the overflow switch 3 is the same as the outer diameter of the inner protective barrel 2, the height of the overflow switch is 130mm, and the overflow opening 2.2 of the inner protective barrel can be completely sealed when the overflow switch 3 is closed. The overflow switch 3 is made of a Q235 round steel plate with the thickness of 12mm, 4 overflow switch overflow ports 3.2 with the same size as the inner protection cylinder overflow port 2.2 are formed in the pipe wall, and when the overflow switch 3 is opened, the inner protection cylinder overflow port 2.2 is overlapped with the overflow switch overflow port 3.2. An insertion rod 3.1 is arranged on the overflow switch 3, and the overflow switch 3 is opened and closed by rotating the insertion rod 3.1.
The construction method is used for construction through the following steps:
A. firstly, intersecting the bottom of constructors, organizing construction equipment and material to enter a field, arranging a corresponding mud pit and a corresponding sedimentation tank in the field, reasonably arranging construction roads and a construction sequence, positioning pile points according to a basic drawing and marking.
B. The method comprises the following steps of firstly determining a hole position base center line through measuring equipment, measuring ground elevation, and then using a four-point positioning method: pile hole positioning guard piles are arranged 3m away from the center of the pile hole, and the pile hole positioning guard piles are arranged front, back, left and right. During construction, stay wires are used for determining the pile position, so that the position is controlled and the verticality is checked in the sinking process of the pile casing, and deviation and deflection are avoided.
C. The outer casing 1 is first hoisted to a lowering position using a truck crane and the pile position accuracy is controlled by measuring the distance to the surrounding spud. And then, hoisting the inner protecting cylinder 2 to a lowering position by using a truck crane, controlling the pile position precision by measuring the distance between the inner protecting cylinder and the surrounding positioning piles, controlling the sinking verticality by using visual inspection and horizontal rule measurement, and controlling the top elevation of the overflow port 2.2 of the inner protecting cylinder to be the pile top elevation. After the pile casing is buried, the periphery of the pile casing is compacted by using clay, and the verticality and the plane position height of the pile casing are checked at any time in the compacting process.
D. The method comprises the following steps that (1) a power head is used for rotating a drill bit embedded with bucket teeth to cut soil bodies in a rotary drilling hole, and a slurry wall protection drilling process is adopted in the drilling process; when the slurry is collected, the inserted rod 3.1 is rotated, the slurry flows into the outer protective cylinder 1 through the inner protective cylinder overflow hole 2.2, and then is sucked out through a slurry pump and discharged into slurry transportation equipment; after the hole cleaning is finished, the inserting rod 3.1 is rotated to close the overflow switch 3.
E. The reinforcement cage is pulled and transported by a self-unloading automobile, and the truck crane is hung and put into the hole. After the hoisting of the reinforcement cage is finished, when the reinforcement cage is placed downwards, technicians position and place the reinforcement cage at the site control plane; strictly controlling the elevation of the top of the cage, fixing two hanging bars around the cage after reaching the designed elevation, processing the hanging bars by phi 18 steel bars, hooking reinforcing ribs of the steel cage at the lower part, hanging hooks at the top of the protective cylinder by upper part hooks, welding the top reinforcing ribs of the steel cage by 2 phi 48 steel pipes, fixing the steel pipes on the protective cylinder, and preventing the steel cage from sinking or floating upwards when pouring concrete.
F. The underwater concrete is poured by a guide pipe method, and the funnel is used for water isolation by a ball pulling method. The steel guide pipe should be assembled and tested for tension and water tightness before pouring, and marked. When the guide pipe is installed, the guide pipe is placed in the center of a drill hole, the axis is straight and stably sunk, a steel bar cage is prevented from being hung and colliding with the hole wall, and the guide pipe is fixed on a cylinder protecting opening or a funnel stand by a chuck after being in place. The upper opening of the guide pipe is provided with a funnel and a storage hopper, and the lower opening of the guide pipe is about 300mm away from the bottom of the hole. The height of concrete and the buried depth of the guide pipe are measured frequently during pouring, the guide pipe is kept centered during lifting and dismantling, the lifting height is determined according to the buried depth of the guide pipe, and the buried depth of the guide pipe after lifting is preferably controlled to be 2-4 m.
G. When the concrete of the cast-in-place pile exceeds the designed elevation of the pile top by 0.8m-1m, rotating the inserting rod 3.1, opening the overflow switch 3, enabling the super-cast concrete to flow out of the inner protective cylinder 2 to the outer protective cylinder 1, after the super-cast concrete is completely discharged, rotating the inserting rod 3.1, closing the overflow switch 3, pulling out the outer protective cylinder 1, if the elevation of the concrete overflowed in the outer protective cylinder 1 does not reach the elevation of the pile top, tamping and backfilling the concrete by adopting a soil body or scattered concrete to the elevation of the pile top, and finally pulling out the inner protective cylinder 2 before the initial setting of the concrete of the cast-in-place pile.
Claims (10)
1. The utility model provides a remove bored concrete pile who cuts pile head from and protect a section of thick bamboo device which characterized by: the cast-in-place pile casing device comprises a double-layer steel casing and an overflow switch (3), wherein the double-layer steel casing comprises an outer casing (1) and an inner casing (2); the outer protective cylinder (1) is in a round table shape and comprises an outer ring (1.1) at the top of the outer protective cylinder, fixed steel bars (1.2), an outer ring (1.3) at the bottom of the outer protective cylinder, a lower cutting plate (1.4) and an inner ring (1.5) at the bottom of the outer protective cylinder, wherein the outer ring (1.3) at the bottom of the outer protective cylinder and the inner ring (1.5) at the bottom of the outer protective cylinder are uniformly welded and fixed by the fixed steel bars (1.2), and the lower cutting plate (1.4) is arranged at the bottom of the outer protective cylinder (1); the inner protecting cylinder (2) is cylindrical and is inserted into an inner ring (5) at the bottom of the outer protecting cylinder, an inner protecting cylinder overflow port (2.2) is formed in the pipe wall, and overflow switch limiting plates (2.1) are arranged on the outer wall of the inner protecting cylinder (2) and the lower part of an inner protecting cylinder overflow hole (2.2); the overflow switch (3) is in a ring shape, is sleeved on the inner protective cylinder (2), has the same diameter as the outer diameter of the inner protective cylinder (2), is provided with an overflow opening (3.2) on the pipe wall, and is provided with an inserted rod (3.1).
2. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: the outer protective cylinder (1) is formed by welding Q235 hot-rolled coils with the thickness of 15 mm.
3. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: the inner ring (1.5) at the bottom of the outer protective cylinder is formed by welding phi 25 steel bars.
4. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: the outer ring (1.3) at the bottom of the outer protective cylinder and the inner ring (1.5) at the bottom of the outer protective cylinder are uniformly welded and fixed by fixing steel bars (1.2) with phi 25.
5. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: the bottom of the outer protective cylinder (1) is provided with an undercut plate (1.4) with the height of 100 mm.
6. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: the inner protective cylinder (2) is formed by welding Q235 hot-rolled coils with the thickness of 12 mm.
7. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: the pipe wall of the inner protective cylinder (2) is provided with 4 inner protective cylinder overflow ports (2.2) which are symmetrically and uniformly distributed, and the height of the opening is 120 mm.
8. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: and overflow switch limiting plates (2.1) are arranged at the positions 20mm below the outer wall of the inner protection barrel (2) and the overflow hole (2.2) of the inner protection barrel.
9. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: the height of the overflow switch (3) is 130mm, and the overflow switch (3) is made of a Q235 round steel plate with the thickness of 12 mm.
10. The cast-in-place pile casing device without cutting head of pile as claimed in claim 1, wherein: the pipe wall of the overflow switch (3) is provided with 4 overflow ports (3.2) of the overflow switch, the size of the overflow ports (3.2) is the same as that of the overflow ports (2.2) of the inner protective cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121886798.6U CN215759001U (en) | 2021-08-12 | 2021-08-12 | Cast-in-place pile casing device capable of avoiding pile cutting head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121886798.6U CN215759001U (en) | 2021-08-12 | 2021-08-12 | Cast-in-place pile casing device capable of avoiding pile cutting head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215759001U true CN215759001U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121886798.6U Active CN215759001U (en) | 2021-08-12 | 2021-08-12 | Cast-in-place pile casing device capable of avoiding pile cutting head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215759001U (en) |
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2021
- 2021-08-12 CN CN202121886798.6U patent/CN215759001U/en active Active
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