CN216551915U - Steel casing capable of separating cast-in-place pile from top to bottom - Google Patents
Steel casing capable of separating cast-in-place pile from top to bottom Download PDFInfo
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- CN216551915U CN216551915U CN202220019320.1U CN202220019320U CN216551915U CN 216551915 U CN216551915 U CN 216551915U CN 202220019320 U CN202220019320 U CN 202220019320U CN 216551915 U CN216551915 U CN 216551915U
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Abstract
The utility model relates to a steel casing with a vertically separable cast-in-place pile, belongs to the field of building and bridge foundation engineering, and particularly relates to a removable cast-in-place pile support steel casing structure. The pile filling pile comprises a retention barrel at the lower part and a pulling-out barrel at the upper part, wherein the retention barrel is connected with the pulling-out barrel through a connecting ring, and the retention barrel and the pulling-out barrel are connected into a whole and are arranged in a hole of a filling pile. Keep somewhere a section of thick bamboo and extract the adapter ring between a section of thick bamboo and be provided with buckle device, keep somewhere a weak stratum that is located the stratum, along with pouring of pile body concrete to above the weak stratum, operate the section of thick bamboo of extracting on upper portion, buckle device can make to keep somewhere a section of thick bamboo and extract a section of thick bamboo separation, keeps somewhere a section of thick bamboo and stays weak stratum department, extracts a section of thick bamboo and extracts. The steel casing which does not need to protect the stratum is pulled out while the pile hole at the weak stratum is effectively protected from hole collapse, and steel is saved.
Description
Technical Field
The utility model relates to a steel casing with a vertically separable cast-in-place pile, belongs to the field of building and bridge foundation engineering, and particularly relates to a removable cast-in-place pile support steel casing structure.
Background
The high-rise building and the bridge generally adopt pile foundations, the pile foundations of the general building are provided with pipe piles and cast-in-place piles, and the high-rise building and the bridge generally adopt cast-in-place piles, namely cast-in-place piles. The pile is a pile with bearing capacity, which is formed by forming a hole in place and pouring concrete. The hole forming method comprises the steps of percussion drilling hole forming and rotary drilling hole forming, wherein when the hole is drilled, a mud protective wall is used for preventing the hole from collapsing, when the pile hole is drilled to the designed depth, the pile hole is firstly washed, the mud of the protective wall is cleaned, the bound steel bars are placed in the hole, underwater concrete is adopted for pouring, the slump of the concrete is large and is in a semi-fluid state, a guide pipe for pouring the concrete extends into the hole, the concrete flows down along the guide pipe, the concrete presses and floats the residual mud on the upper part of the concrete, the guide pipe is lifted along with the pouring of the concrete, the outlet of the lower part is always buried below the poured concrete, and the mud is extruded along with the pouring of the concrete to the pile top, so that the pile body forms continuous and complete concrete.
Pouring the cast-in-place pile in a place with good geological conditions, arranging a steel casing 1-2 meters below the ground to prevent an orifice from collapsing, drilling a stratum with good soil property by using slurry to protect a wall, keeping a pile hole intact after hole washing, and extruding residual slurry out of the pile hole when concrete is poured. However, when the slurry protective wall meets soft soil strata such as silt, mucky soil, sand flowing layers and the like, the slurry protective wall can not ensure that the hole wall does not collapse, a steel protective cylinder is required to be adopted for protection during construction, and the steel protective cylinder generally needs to be arranged below the soft stratum by 0.5 meter. Such as: the length of the cast-in-place pile is 30 meters, a sand layer exists in the range of 20-25 meters, the steel pile casing cannot protect only the part, the steel pile casing is required to be directly below the sand layer from the ground to 0.5 meter below the sand layer, and the length of the steel pile casing is required to be 25.5 meters. The method has the advantages that the hole collapse can be prevented after the concrete is poured, when the underwater concrete of the cast-in-place pile is poured, the steel casing can be continuously pulled out along with the pouring height of the concrete, but in the stratums such as a silt layer and a quicksand layer, the pulling-out of the steel casing can cause the silt and the quicksand to permeate into a pile body, so that the whole pile is scrapped, or the pouring amount of the concrete is greatly increased along with the flowing of the quicksand. Therefore, when the pile foundation is designed, according to geological survey reports, the steel casing is adopted to protect both a sludge layer and a sand flow layer, and the steel casing is not pulled out. According to the example, the 5m quicksand layer needs 6 m steel casing, but the steel casing is welded and falls to the protection position section by section, the steel casing at the position of the 6 m quicksand layer is reserved, the upper 19.5 m steel casing cannot be pulled out, the diameter of the pile foundation of a high-rise building and a bridge is generally 1.2-2 m, the steel consumption of the steel casing calculated according to the perimeter is not less than a small amount, and the steel casing at the upper part left in the soil layer is wasted.
Disclosure of Invention
The purpose of the utility model is: the utility model provides a separable steel protects a section of thick bamboo about bored concrete pile, including the lower part stay a section of thick bamboo and the section of thick bamboo of extracting on upper portion, keep somewhere a section of thick bamboo and extract a section of thick bamboo and pass through the adapter ring and be connected, keep somewhere a section of thick bamboo and extract a section of thick bamboo and ally oneself with an organic whole and set up downthehole at bored concrete pile, keep somewhere a weak stratum that a section of thick bamboo is located the stratum, along with pouring of pile body concrete to above the weak stratum, extract a section of thick bamboo and keep somewhere a section of thick bamboo separation, keep somewhere a section of thick bamboo and stay weak stratum department, extract a section of thick bamboo and extract gradually. The beneficial effects are that: the pile hole at the weak stratum is effectively protected from hole collapse, and meanwhile, the steel casing which does not need to protect the stratum is pulled out, so that steel is saved.
The utility model is realized by the following technologies: the utility model provides a bored concrete pile separable steel protects a section of thick bamboo from top to bottom, protect a section of thick bamboo for circular tube-shape, mainly including the lower part keep somewhere a section of thick bamboo 1 and an extraction section of thick bamboo 2 on upper portion, the lower part of extraction section of thick bamboo 2 sets up the adapter ring 3, it is connected through adapter ring 3 with an extraction section of thick bamboo 2 to keep somewhere a section of thick bamboo 1 and a extraction section of thick bamboo 2 unification and sets up in the bored concrete pile downthehole, the lower part of keeping somewhere a section of thick bamboo 1 is for not having a pile hole 4 that protects, it is located the holding power layer 5 in stratum to have a pile hole 4 that protects, it is located the weak stratum 6 in stratum to keep somewhere a section of thick bamboo 1, extraction section of thick bamboo 2 is located the ground top layer 7 in stratum, when the concrete placement pile foundation keeps somewhere a section of thick bamboo 1 top position, it separates with a section of thick bamboo 2 to pull out, extraction section of thick bamboo 2 is along with the pouring of thick bamboo of upper portion pile and is gradually pulled out, it stays in the underground pile foundation to keep somewhere.
The connecting ring 3 is arranged at the lower part of the pulling-out cylinder 2 and welded with the pulling-out cylinder 2, and the lower edge of the connecting ring 3 is uniformly provided with buckling devices along the circumference, and each buckling device comprises a connecting ring bayonet 8, a transverse groove 9 and a clamping groove 10.
The upper part of the indwelling barrel 1 is provided with tenons 11, and the number and the positions of the tenons 11 correspond to the buckling devices of the connecting ring 3.
The tenon 11 is inserted into the connecting ring bayonet 8, the barrel 2 is rotationally pulled out, the tenon 11 is along the transverse groove 9 to the clamping groove 10, the tenon 11 is embedded in the clamping groove 10 under the action of the gravity of the indwelling barrel 1, and the indwelling barrel 1 and the barrel 2 are connected together.
The pulling-out barrel 2 is pressed downwards, the tenon 11 is separated from the clamping groove 10, the pulling-out barrel 2 rotates reversely, the pulling-out barrel 2 is lifted upwards, the tenon 11 slides out along the connecting ring bayonet 8, and the pulling-out barrel 2 is separated from the remaining barrel 1.
The pulling-out cylinder 2 is formed by connecting and combining a plurality of sections, each section is 1-2 m in length, and the pulling-out cylinder 2 is disassembled section by section along with pulling-out.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a view of a construction of a coupling ring;
FIG. 3 is a structural view of the joint between the indwelling barrel and the adapter ring;
FIG. 4 is a view showing a connecting structure of a indwelling cartridge and a pulling-out cartridge.
In the figure: 1-retention cylinder, 2-extraction cylinder, 3-connecting ring, 4-pile hole without protective cylinder, 5-bearing layer, 6-weak stratum, 7-ground surface layer, 8-connecting ring bayonet, 9-transverse groove, 10-clamping groove and 11-tenon.
Detailed Description
The utility model is used for the cast-in-situ bored pile with soft stratum, a detachable steel casing is adopted to support at the pile hole with soft foundation, when the underwater concrete pouring of the pile body exceeds the top surface of the soft stratum, the steel casing at the upper part is taken out, and the steel can be saved. In order that those skilled in the art can better understand the present invention, the present invention will be further described with reference to fig. 1 to 4, and the description of the embodiments is not intended to limit the present invention.
Separable steel protects a section of thick bamboo about the bored concrete pile, it is circular tube-shape to protect a section of thick bamboo, it mainly includes the lower part keeps somewhere a section of thick bamboo 1 and an extraction section of thick bamboo 2 on upper portion, the lower part of an extraction section of thick bamboo 2 sets up the adapter ring 3, it is connected through adapter ring 3 with an extraction section of thick bamboo 1 to keep somewhere a section of thick bamboo 1 and an extraction section of thick bamboo 2 antithetical couplet and sets up in the bored concrete pile downthehole, the lower part of keeping somewhere a section of thick bamboo 1 is for not having a section of thick bamboo stake hole 4 that protects, it is located the bearing layer 5 on stratum to have a section of thick bamboo stake hole 4 to protect, it is located the weak stratum 6 on stratum to keep somewhere a section of thick bamboo 1, it is located the ground top layer 7 on stratum to extract a section of thick bamboo 2, pile foundation concrete placement is to when keeping somewhere a section of thick bamboo 1 top position, it separates with keeping somewhere a section of thick bamboo 1, it extracts a section of thick bamboo 2 along with upper portion concrete placement gradually to extract, it stays in the underground pile foundation to keep somewhere. The stratum in the figure 1 is divided into three layers, the lowest layer is a bearing layer 5 which is a main part for bearing the pile foundation, the layer is generally high in hardness, the hole wall collapse cannot occur during drilling, hole mud is adopted for wall protection during drilling, a pile casing is not required to be arranged, and the corresponding part of pile holes are pile holes 4 without the pile casings. The upper part of the bearing stratum 5 is a soft stratum 6 which is generally silt, mucky soil, quicksand and the like, the stratum is easy to collapse during drilling, particularly the quicksand layer, the drilling hole can be expanded along with the quicksand, a steel protective cylinder is required to be adopted to protect the stratum during drilling, a remaining cylinder 1 is arranged corresponding to the steel protective cylinder of the stratum, and the pile body concrete is poured and then left underground. The upper part of the weak stratum 6 is a surface layer 7 which generally comprises clay and silty clay, the layer corresponds to the pull-out barrel 2, and the layer can prevent hole collapse by adopting slurry to protect the wall when drilling, but the layer needs to be arranged when drilling in order to send the retention barrel 1 to the weak stratum 6. When the underwater concrete of the pile body is poured, the pulling-out cylinder 2 is separated from the remaining cylinder 1, and the pulling-out cylinder 2 is gradually pulled out along with the pouring of the concrete. In fig. 1, three layers of strata are only illustrated, in actual engineering, the supporting layer 5 and the ground surface layer 7 may be soil layers with different soil textures, the weak stratum 6 may also be composed of different soil textures, even an interlayer is provided, but the soil texture structure properties of each layer are similar, and in fig. 1, soil layers with the same property are subdivided and combined to be divided into three layers of different types, which serve as an illustrative embodiment of the present invention.
The indwelling barrel 1 and the pulling barrel 2 are made of steel plates through welding, and the thickness of the steel plates is determined according to the pile diameter and geological conditions and is generally 10-20 mm. The length of the retention cylinder 1 is 1 meter greater than the thickness of the weak stratum 6 and 0.5 meter greater than the bottom surface and the top surface of the weak stratum 6. Because the pulling-out barrel 2 is to be pulled out gradually along with the poured concrete, the pulling-out barrel 2 is formed by connecting and combining a plurality of sections, and each section is 1-2 m in length, so that the pulling-out barrel 2 can be conveniently disassembled section by section. The connection of each section of extraction cylinder 2 adopts the welding, can adopt 50mm wide, the long steel sheet of 100mm, along two sections 2 seam week equipartitions of extraction cylinder 4~12, the welding is in two sections seam departments, cuts off the steel sheet when extraction cylinder 2 extracts. The steel plate can be welded on the upper edge of one section of the pulling-out barrel 2, the lower edge corresponding to the other section of the pulling-out barrel 2 is fixed by screws, the screws are disassembled when the pulling-out barrel 2 is pulled out, and the two sections of the pulling-out barrels 2 are separated.
And the connecting ring 3 for connecting the indwelling barrel 1 and the pulling-out barrel 2 is arranged at the lowest part of the whole pulling-out barrel 2 and is welded with the pulling-out barrel 2 at the lowest part, and the inner diameter of the connecting ring 3 is the same as the outer diameters of the indwelling barrel 1 and the pulling-out barrel 2. The lower edge of the connecting ring 3 is uniformly provided with clamping devices along the circumference, the clamping devices comprise connecting ring bayonets 8, transverse grooves 9 and clamping grooves 10, and the connecting ring is shown in a structural diagram of fig. 2. The connecting ring 3 is also welded by a steel plate, the height is 150-200 mm, and the width of the bayonet 8, the transverse groove 9 and the clamping groove 10 is 20-25 mm.
The upper part of the indwelling barrel 1 is provided with a tenon 11 for connecting with the connecting ring 3. The number and position of the tenons 11 correspond to the snap means of the collar 3, see figure 3 construction of the connection of the indwelling cartridge and the collar. The width and the height of the tenon 11 are 2-3 mm smaller than the width of the bayonet 8, the transverse groove 9 and the clamping groove 10, so that the tenon can be conveniently clamped. In order to prevent the tenon 11 from falling off when the leave-on barrel 1 is not firmly welded, after the edge of the tenon 11 is welded, a hole is drilled in the center of the tenon 11, the leave-on barrel 1 is drilled through, a screw of 8-10 mm is screwed in the hole by tapping, and the hole is welded with the screw on the inner wall of the leave-on barrel 1.
In practical application, the length required for installing the indwelling cylinder 1 is welded, the bottommost extracting cylinder 2 with the connecting ring 3 is aligned to the tenon 11 at the uppermost part of the indwelling cylinder 1, the tenon 11 is inserted into the connecting ring bayonet 8, the extracting cylinder 2 is rotated, the tenon 11 is along the transverse groove 9 to the clamping groove 10, the tenon 11 is embedded into the clamping groove 10 under the action of the gravity of the indwelling cylinder 1, the extracting cylinders 2 of the indwelling cylinder 1 are connected together, and the connecting and combining structural diagram of the indwelling cylinder and the extracting cylinder is shown in fig. 4. The connected indwelling barrel 1 and the connected pulling barrel 2 rotate along the screwing direction and fall down along with the increase of the drilling depth, the pulling barrel 2 is welded and pulled out section by section until the indwelling barrel 1 is placed on a weak stratum 6, the tenon 11 is embedded in the clamping groove 10 when the concrete is drilled and poured, and the indwelling barrel 1 cannot be separated from the connecting ring 3.
After drilling is accomplished, through washing the hole, satisfy behind the mud sediment thickness, can lay reinforcing bar and concreting, when bored concrete pile underwater concrete pours, need constantly measure concrete top surface elevation, promote with the pipe of control concreting, combine to measure the elevation, when confirming concrete top surface reachs adapter ring 3, extract a section of thick bamboo 2 and push down, tenon 11 breaks away from draw-in groove 10, a section of thick bamboo 2 is extracted in the reverse rotation, extract a section of thick bamboo 2 and upwards lift, tenon 11 is followed the adapter ring bayonet socket 8 roll-off, extract a section of thick bamboo 2 and keep somewhere a section of thick bamboo 1 separation, will extract a section of thick bamboo 2 and extract the stake hole. If the extraction cylinder 2 can be lifted section by section along with the lifting of the pouring guide pipe and removed section by section in order to avoid the collapse of the hole wall of the upper ground surface layer 7, the extraction cylinder 2 is lifted synchronously and removed section by section. The retention cylinder 1 is left in the ground in the weak formation 6.
The description and drawings of the present application are to be regarded as illustrative in nature and not restrictive, and it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the present application.
Claims (6)
1. A cast-in-place pile up-down separable steel protects a section of thick bamboo, characterized by: the pile casing is a circular cylinder, the pile casing mainly comprises a remaining cylinder (1) and a pulling-out cylinder (2) which are arranged on the lower portion, a connecting ring (3) is arranged on the lower portion of the pulling-out cylinder (2), the remaining cylinder (1) is connected with the pulling-out cylinder (2) through the connecting ring (3), the remaining cylinder (1) and the pulling-out cylinder (2) are integrally arranged in a bored concrete pile hole, the lower portion of the remaining cylinder (1) is a pile hole (4) without the remaining cylinder, the pile hole (4) without the remaining cylinder is located on a bearing layer (5) of a stratum, the remaining cylinder (1) is located on a weak stratum (6) of the stratum, the pulling-out cylinder (2) is located on a ground surface layer (7) of the stratum, pile foundation concrete is poured to the top of the remaining cylinder (1), the pulling-out cylinder (2) is separated from the remaining cylinder (1), the pulling-out cylinder (2) is gradually pulled out along with the pouring of the pile foundation concrete on the upper portion, and the remaining cylinder (1) is left in the underground.
2. A cast-in-place pile up-and-down separable steel casing according to claim 1, characterized in that: the connecting ring (3) is arranged on the lower portion of the extracting barrel (2) and welded with the extracting barrel (2), and the lower edge of the connecting ring (3) is uniformly provided with buckling devices along a circle, wherein each buckling device comprises a connecting ring bayonet (8), a transverse groove (9) and a clamping groove (10).
3. A cast-in-place pile steel casing separable from top to bottom as claimed in claim 1 or 2, wherein: the upper part of the indwelling barrel (1) is provided with tenons (11), and the number and the positions of the tenons (11) correspond to the buckling devices of the connecting rings (3).
4. A cast-in-place pile up-and-down separable steel casing according to claim 3, characterized in that: the tenon (11) is inserted into the connecting ring bayonet (8), the barrel (2) is rotationally pulled out, the tenon (11) is arranged from the transverse groove (9) to the clamping groove (10), the tenon (11) is embedded into the clamping groove (10) under the action of the gravity of the indwelling barrel (1), and the pulling-out barrel (2) of the indwelling barrel (1) is connected together.
5. A cast-in-place pile up-and-down separable steel casing according to claim 4, characterized in that: the pulling-out cylinder (2) is pressed downwards, the tenon (11) is separated from the clamping groove (10), the pulling-out cylinder (2) rotates reversely, the pulling-out cylinder (2) is lifted upwards, the tenon (11) slides out along the connecting ring bayonet (8), and the pulling-out cylinder (2) is separated from the remaining cylinder (1).
6. A cast-in-place pile up-and-down separable steel casing according to claim 1, characterized in that: the pulling-out cylinder (2) is formed by connecting and combining a plurality of sections, each section is 1-2 m in length, and the pulling-out cylinder (2) is disassembled section by section along with pulling-out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220019320.1U CN216551915U (en) | 2022-01-06 | 2022-01-06 | Steel casing capable of separating cast-in-place pile from top to bottom |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220019320.1U CN216551915U (en) | 2022-01-06 | 2022-01-06 | Steel casing capable of separating cast-in-place pile from top to bottom |
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| CN216551915U true CN216551915U (en) | 2022-05-17 |
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| CN202220019320.1U Active CN216551915U (en) | 2022-01-06 | 2022-01-06 | Steel casing capable of separating cast-in-place pile from top to bottom |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516957A (en) * | 2023-07-04 | 2023-08-01 | 中交第一航务工程局有限公司 | Construction method of detachable soft foundation area pile foundation steel casing |
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2022
- 2022-01-06 CN CN202220019320.1U patent/CN216551915U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516957A (en) * | 2023-07-04 | 2023-08-01 | 中交第一航务工程局有限公司 | Construction method of detachable soft foundation area pile foundation steel casing |
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