CN109811764B - Recyclable steel pile casing for bored pile construction and construction method - Google Patents
Recyclable steel pile casing for bored pile construction and construction method Download PDFInfo
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- CN109811764B CN109811764B CN201910246763.7A CN201910246763A CN109811764B CN 109811764 B CN109811764 B CN 109811764B CN 201910246763 A CN201910246763 A CN 201910246763A CN 109811764 B CN109811764 B CN 109811764B
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- 238000010276 construction Methods 0.000 title claims abstract description 95
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 69
- 239000010959 steel Substances 0.000 title claims abstract description 69
- 230000001681 protective effect Effects 0.000 claims abstract description 65
- 230000000452 restraining effect Effects 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims description 17
- 238000011065 in-situ storage Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims 2
- 241001330002 Bambuseae Species 0.000 claims 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 2
- 239000011425 bamboo Substances 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000004576 sand Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Abstract
The application discloses a recyclable steel casing for bored pile construction and a construction method. The recyclable steel casing for bored pile construction comprises a bottom section casing, an inner casing, an outer casing, a radial restraining device and a pre-tightening connection dismantling device. The inner protective cylinder, the outer protective cylinder and the bottom section protective cylinder are coaxially arranged, and the lower end of the inner protective cylinder is fixedly connected with the bottom section protective cylinder. The outer protective cylinder sleeve is arranged outside the inner protective cylinder, an annular accommodating cavity is formed between the inner wall of the outer protective cylinder and the outer wall of the inner protective cylinder, and the lower end face of the outer protective cylinder is abutted to the upper end face of the bottom section protective cylinder. The radial restraining device restrains the lower end face of the outer casing and the upper end face of the bottom section casing in the radial direction. The upper end of the inner casing is in pretension and detachable connection with the outer casing through a pretension connection and detachment device. The technical scheme provided by the application is used for solving the problem that most steel pile casings cannot be recovered and waste is caused in the conventional pile construction method at present.
Description
Technical Field
The application relates to the technical field of building construction, in particular to a recyclable steel casing for bored pile construction and a construction method.
Background
When the bored pile is constructed in water, in soft foundation areas and adjacent to buildings, the conventional construction method of the piling requires the prior installation of a temporary steel casing. Because the temporary steel pile casing does not need to participate in structural stress, after the bored pile is constructed, most temporary steel pile casings cannot be recycled in the conventional pile construction method at present, and great waste is caused.
Disclosure of Invention
The application provides a recyclable steel pile casing for bored pile construction and a construction method, which are used for solving the problem that most of steel pile casings cannot be recycled and waste is caused in the conventional pile construction method at present.
In a first aspect, a steel casing of a bored pile construction is provided, the steel casing of the bored pile construction comprises a bottom section casing, an inner casing, an outer casing, a radial restraining device and a pre-tightening connection dismantling device. The inner protective cylinder, the outer protective cylinder and the bottom section protective cylinder are coaxially arranged, and the lower end of the inner protective cylinder is fixedly connected with the bottom section protective cylinder. The outer protective cylinder sleeve is arranged outside the inner protective cylinder, an annular accommodating cavity is formed between the inner wall of the outer protective cylinder and the outer wall of the inner protective cylinder, and the lower end face of the outer protective cylinder is abutted to the upper end face of the bottom section protective cylinder. The radial restraining device restrains the lower end face of the outer casing and the upper end face of the bottom section casing in the radial direction, and the upper end of the inner casing is pre-tightened and detachably connected with the outer casing through the pre-tightening connection dismantling device.
In the above scheme, provide a drilling bored concrete pile construction recoverable steel pile casing, this drilling bored concrete pile construction recoverable steel pile casing is used for drilling bored concrete pile construction, after the construction is accomplished, can retrieve this drilling bored concrete pile construction recoverable steel pile casing's part to resources are saved and reduce cost. The steel pile casing is transported and constructed integrally by the bottom section casing, the inner casing, the outer casing, the radial restraining device and the pre-tightening connection dismantling device, and in the actual cast-in-place pile construction, the steel pile casing is sunk into the design depth of the drilling hole as a whole. And after the concrete age of the bored pile reaches the strength requirement, the connection between the inner casing and the outer casing is released through the pre-tightening connection dismantling device, and the outer casing can be easily pulled out due to the existence of the annular accommodating cavity, so that the outer casing can be recycled and reused. Because the thickness of the outer casing is reinforced to achieve the sinking rigidity of construction in order to ensure smooth construction of the cast-in-situ pile, the thickness of the inner casing is thinner than that of the existing casing, so that the recycled material of the outer casing accounts for most of the whole material of the recycled steel casing for construction of the cast-in-situ pile, and the total material of the inner casing and the bottom section casing is less than that of the existing casing, so that under the condition that the outer casing is recycled, the steel consumed by the inner casing and the bottom section casing is less than that of the existing casing, thereby saving resources and reducing cost.
In one possible implementation, a filler is provided within the annular receiving cavity.
In the scheme, the annular accommodating cavity is filled with the filler, so that the strength of the inner casing is improved, and the smooth operation of the bored pile construction is ensured.
Optionally, in one possible implementation manner, the steel casing of the bored pile construction is further provided with a high-pressure pipe, one end of the high-pressure pipe is used for connecting a high-pressure water source, the other end of the high-pressure pipe stretches into the annular accommodating cavity, and the high-pressure pipe is fixedly connected with the inner casing or the outer casing.
In the scheme, the high-pressure pipe is arranged, when the concrete age of the bored pile reaches the strength requirement in the construction process of the bored pile, the outer protective cylinder is required to be pulled out, the high-pressure water source is connected through the high-pressure pipe for reducing the friction force between the outer protective cylinder and the inner protective cylinder, and the filler in the annular accommodating cavity is punched out, so that the outer protective cylinder can be pulled out easily.
In one possible implementation, the pre-tightening connection removal device includes an anchor member having one end secured to the inner wall of the outer casing and a fastener threaded through the anchor member and abutting the inner wall of the inner casing.
In the above-mentioned scheme, pretension connection demolishs device is an anchor structure, and it includes the anchor assembly fixed with outer protective casing and is used for the fastener of butt interior protective casing, because the anchor assembly is with outer protective casing fixed connection, so, when retrieving outer protective casing, can retrieve the anchor assembly simultaneously to do benefit to the saving of resource, simultaneously, because the anchor assembly is with outer protective casing fixed connection, so when assembling outer protective casing and interior protective casing, can make things convenient for operating personnel to construct.
In one possible implementation, the radial restraining device includes at least one lateral clamping block group, each lateral clamping block group includes an inner clamping block and an outer clamping block, the inner clamping block and the outer clamping block are respectively fixed on an inner wall and an outer wall of the bottom section casing, and the inner clamping block and the outer clamping block jointly clamp the lower end of the outer casing.
In the scheme, the transverse clamping block group is arranged on the wall surface of the bottom section casing, the inner side clamping block and the outer side clamping block are clamped together, so that the outer casing can be rapidly positioned and placed against the upper end surface of the bottom section casing, the outer casing is limited to move relative to the bottom section casing in the radial direction, the assembly efficiency of the outer casing is improved, the matching relationship between the outer casing and the bottom section casing is firmer, the integrity of the whole recycled steel casing for cast-in-situ bored pile construction is improved, the transportation is facilitated, the effect of recycling the outer casing is not affected, and the sinking construction is facilitated.
In a second aspect, a method for constructing a bored pile is provided, which includes:
manufacturing a recyclable steel casing for bored pile construction in the technical scheme provided by the first aspect;
Vibrating and sinking the recyclable steel casing for bored pile construction to the designed depth;
carrying out bored pile construction on the inward pile casing;
after the cast-in-situ pile concrete reaches the strength requirement, the connection between the outer casing and the inner casing is released;
And (5) pulling out the outer protective cylinder.
In one possible implementation manner, the bored pile construction method further comprises: and filling the annular accommodating cavity with a filler before the bored pile is constructed.
Optionally, in one possible implementation manner, the bored pile construction method further includes: the filling in the annular receiving cavity is discharged by high pressure water before the outer casing is pulled out.
Optionally, in one possible implementation manner, in the bored pile construction method, the step of making the recyclable steel casing for bored pile construction includes:
providing an inner casing, an outer casing, and a bottom section casing;
the upper end of the inner protective cylinder is connected with the outer protective cylinder through a pre-tightening connection dismantling device;
the lower end face of the outer protective cylinder is abutted against the upper end face of the bottom section protective cylinder; the lower end of the inner protective cylinder is fixedly connected with the bottom section protective cylinder.
Optionally, in one possible implementation manner, the step of manufacturing the bored pile construction recoverable steel casing further includes:
The inner wall and the outer wall of the bottom joint protection cylinder are respectively fixed with an inner clamping block and an outer clamping block, and the lower end of the outer protection cylinder is clamped by the inner clamping block and the outer clamping block.
The technical scheme provided by the second aspect and any one possible implementation manner of the second aspect can solve the problem that most of steel casings cannot be recovered and waste is caused in the conventional piling construction method at present.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a recyclable steel casing for bored pile construction according to an embodiment of the present application at a first perspective;
Fig. 2 is a schematic structural view of a recyclable steel casing for bored pile construction according to an embodiment of the present application at a second perspective;
FIG. 3 is a schematic view of another construction of a recyclable steel casing for bored pile construction according to an embodiment of the present application;
FIG. 4 is a schematic flow chart of a method for constructing a bored pile according to an embodiment of the present application;
FIG. 5 is a schematic flow chart of another method for constructing a bored pile according to an embodiment of the present application;
fig. 6 is a flow chart illustrating another method for constructing a bored pile according to an embodiment of the present application.
Icon: 10-construction of a recyclable steel pile casing for cast-in-situ bored pile; 10 a-drilling a filling pile; 11-a bottom section protection cylinder; 12-an inner casing; 13-an outer casing; 14-pre-tightening the connection demolition unit; 61-an inner clip; 62-an outer clamping block; 70-high pressure tube; 80-an annular receiving cavity; 90-filling; 140-anchors; 141-fasteners.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present application, it should be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on those shown in the drawings, or those conventionally put in place when the product of the application is used, or those conventionally understood by those skilled in the art, merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The technical scheme of the application will be described below with reference to the accompanying drawings.
The present embodiment provides a steel casing 10 with a recyclable bored pile construction, where the steel casing 10 is used for the bored pile construction, and is used for solving the problem that most of the steel casings cannot be recycled and waste is caused in the current conventional construction method for the bored pile, and the size model of the steel casing used in the conventional construction is equal to the size model of the outer casing 13 in the steel casing 10 with a recyclable bored pile construction, which is one possible implementation in the present technical solution, and the following examples are given.
Referring to fig. 1, fig. 1 shows a specific structure of a recyclable steel casing 10 for bored pile construction in the present embodiment at a first angle of view. Fig. 2 shows a specific structure of the recyclable steel casing 10 for bored pile construction in the present embodiment at a second angle of view.
The steel casing 10 with the recoverable bored pile construction comprises a bottom section casing 11, an inner casing 12, an outer casing 13, a radial restraining device and a pretension connection dismantling device 14. The inner casing 12 and the bottom section casing 11 are coaxially arranged, and the lower end of the inner casing 12 is fixedly connected with the bottom section casing 11. The outer casing 13 is sleeved outside the inner casing 12, and an annular accommodating cavity 80 is formed between the inner wall of the outer casing 13 and the outer wall of the inner casing 12. The lower end surface of the outer protective cylinder 13 and the upper end surface of the bottom section protective cylinder 11 are arranged in the same section. The lower end surface of the outer casing 13 abuts against the upper end surface of the base casing 11. The radial restraining means restrains the lower end face of the outer casing 13 and the upper end face of the base casing 11 in the radial direction, and the outer casing 13 and the base casing 11 are separable from each other in the vertical (axial) direction. The upper end of the inner casing 12 is in pretension and detachable connection with the outer casing 13 through a pretension connection dismounting device 14.
The steel casing 10 is used for cast-in-situ bored pile construction, and after the cast-in-situ bored pile construction is completed, the part of the steel casing 10 can be recovered, so that resources are saved and cost is reduced. The steel casing 10 is integrally formed by a bottom section casing 11, an inner casing 12, an outer casing 13, a radial restraining device and a pretension connection dismantling device 14 for transportation and construction, and in actual cast-in-place pile construction, the steel casing 10 is integrally sunk into the design depth of a drill hole. The construction of the bored pile 10a is performed inside the inner casing 12 (the bored pile 10a is shown in fig. 2), after the concrete age of the bored pile 10a reaches the strength requirement, the connection between the inner casing 12 and the outer casing 13 is released by the pretensioned connection removing means 14, and the outer casing 13 can be easily pulled out due to the presence of the annular receiving chamber 80, so that the outer casing 13 is recovered and can be reused. Because the thickness of the outer casing 13 is reinforced to achieve the sinking rigidity of the construction in order to ensure smooth proceeding of the cast-in-place pile construction, the thickness of the inner casing 12 is thinner than that of the existing casing, so that the recycled material of the outer casing 13 accounts for most of the whole material of the recycled steel casing 10 for the cast-in-place pile construction, and the total material of the inner casing 12 and the bottom section casing 11 is less than that of the existing casing, so that under the condition that the outer casing 13 is recycled, the consumed steel of the inner casing 12 and the bottom section casing 11 is less than that of the existing casing, thereby saving resources and reducing cost. Meanwhile, the following examples are possible practical construction: in general, in order to ensure the rigidity and strength of construction, a steel casing of a cast-in-situ bored pile with phi of 1.4m generally requires that the diameter of the conventional steel casing used is 1.7m and the thickness of the steel casing is 15mm, the conventional steel casing cannot be recovered after the cast-in-situ bored pile is constructed, the thickness of the outer casing 13 of the steel casing 10 is 15mm (the construction strength and rigidity are ensured), the thickness of the inner casing 12 can be designed to be 4mm, the thickness of the bottom section casing 11 is designed to be 15mm (1 m high), and the outer casing 13 with the thickness of 15mm can be recovered after the concrete age of the cast-in-situ bored pile meets the strength requirement. Meanwhile, in other possible embodiments for practical construction, the thick bottoms and diameters of the outer casing 13, the inner casing 12 and the bottom section casing 11 may be designed according to practical construction requirements.
In one possible implementation, a filler 90 is disposed within the annular receiving cavity 80. As shown in fig. 1, by filling the annular receiving chamber 80 with the filler 90, the strength of the inner casing 12 is improved, ensuring smooth progress of the bored pile construction.
It should be noted that, the filler 90 may be a material such as sand, foam, or plastic, in this embodiment, the annular accommodating cavity 80 is densely filled with sand, and in other embodiments, the filler 90 may be at least one material such as sand, foam, or plastic.
In one possible implementation, as shown in fig. 3, fig. 3 shows a specific structure of another recycled steel casing 10 for bored pile construction in this embodiment (in which, for clarity of illustration, the pretensioning connection removal apparatus 14 is not shown in fig. 3).
The recyclable steel casing 10 for bored pile construction further comprises a high-pressure pipe 70, one end of the high-pressure pipe 70 is used for being connected with a high-pressure water source, the other end of the high-pressure pipe extends into the annular accommodating cavity 80, and the high-pressure pipe 70 is fixedly connected with the inner casing 12 or the outer casing 13.
Wherein, be provided with high-pressure pipe 70, when the bored pile construction process, after the bored pile concrete age reached intensity requirement, need pull out outer protective casing 13, in order to reduce the frictional force between outer protective casing 13 and the interior protective casing 12, put through high-pressure water source through high-pressure pipe 70, wash out the filler 90 in the annular holding chamber 80 to make outer protective casing 13 can be pulled out easily. Meanwhile, it should be noted that, in the present embodiment, the plurality of high-pressure pipes 70 are provided, and the plurality of high-pressure pipes 70 are welded to the inner wall of the outer casing 13 at intervals, and when the outer casing 13 is recovered, the high-pressure pipes 70 are also recovered along with the outer casing 13, thereby effectively solving the manufacturing cost and the construction cost.
Meanwhile, if the annular housing chamber 80 is filled with the filler 90, the pulling-out of the outer casing 13 is not affected under the condition that the filler 90 is not punched out, and the high-pressure pipe 70 may not be provided.
Further, in one possible implementation, as shown in fig. 1, the pretensioned connection removal device 14 includes an anchor 140 and a fastener 141, one end of the anchor 140 being fixed to the inner wall of the outer casing 13, the fastener 141 being provided through the anchor 140, the fastener 141 abutting against the inner wall of the inner casing 12.
Wherein, pretension connection demolishs device 14 is an anchor structure, and it includes anchor member 140 fixed with outer pile casing 13 and is used for the fastener 141 of butt interior pile casing 12, because anchor member 140 is fixed connection with outer pile casing 13, so, when retrieving outer pile casing 13, can retrieve anchor member 140 simultaneously to do benefit to the saving of resource, simultaneously, because anchor member 140 is fixed connection with outer pile casing 13, so when assembling outer pile casing 13 and interior pile casing 12, can make things convenient for operating personnel to construct. Specifically, in one possible implementation, the anchoring member 140 is a steel plate welded to the inner wall of the outer casing 13, and the steel plate is provided with a threaded hole, and the fastening member 141 is a bolt and a nut, where one end of the bolt is welded to the inner wall of the inner casing 12, and the other end of the bolt passes through the threaded hole and is screwed with the nut, so that the outer casing 13 and the inner casing 12 are mutually pre-fastened in the axial direction to form a whole. Wherein, through setting up a plurality of anchor structures, evenly set up around the axis of interior pile casing 12, can make the positional relationship of interior pile casing 12 relative to outer pile casing 13 more firm.
It should be noted that, in other embodiments, the pretensioning connection removing device 14 may be other devices capable of making the outer casing 13 and the inner casing 12 in a mutually pretensioned and detachable connection relationship, for example, at least one hydraulic device is disposed between the inner wall of the outer casing 13 and the top of the inner casing 12 to achieve the pretensioning and detachable connection relationship.
It should be noted that the anchoring structure may be other types of anchoring structures, and in other embodiments, the anchoring member 140 may be fixed to the inner casing 12, and the fastening member 141 may be other structures, such as a chain block.
Further, in one possible implementation, as shown in fig. 1, the radial restraining device includes at least one lateral clamping block group, each lateral clamping block group includes an inner clamping block 61 and an outer clamping block 62, the inner clamping block 61 and the outer clamping block 62 are respectively fixed to the inner wall and the outer wall of the bottom section casing 11, and the inner clamping block 61 and the outer clamping block 62 jointly clamp the lower end of the outer casing 13.
Wherein, be provided with horizontal fixture block group at the wall of bottom festival pile casing 11, through the common centre gripping of inboard fixture block 61 and outside fixture block 62, make outer pile casing 13 can be quick location and lay and lean on the up end of bottom festival pile casing 11, and the motion of outer pile casing 13 for bottom festival pile casing 11 has been restricted in radial direction, thereby make the assembly efficiency of outer pile casing 13 obtain improving, and make the cooperation relation between outer pile casing 13 and the bottom festival pile casing 11 more firm, improve the wholeness of whole bored concrete pile construction recoverable steel pile casing 10, the transportation of being convenient for and on the effect that does not influence retrieving outer pile casing 13, the construction of being convenient for sinks.
It should be noted that, in the specific structure shown in fig. 1, the number of the transverse clamping block groups is plural, the plural transverse clamping block groups are disposed at intervals and are disposed on the wall surface of the bottom section casing 11 around the axis of the bottom section casing 11, wherein each transverse clamping block group includes an outer clamping block 62 and an inner clamping block 61, each transverse clamping block group and the upper end surface of the bottom section casing 11 enclosed by the outer clamping block group together define a containing groove, the lower end of the outer casing 13 is inserted into the containing groove, the plural transverse clamping block groups and the upper end surface of the bottom section casing 11 define plural containing grooves, and the outer casing 13 can be effectively positioned and stably supported on the upper end surface of the bottom section casing 11. In other possible embodiments, only one lateral clamping block set may be provided for the steel casing 10 for bored pile construction, where the lateral clamping block set may include an outer clamping block 62 and an inner clamping block 61, and the outer clamping block 62 and the inner clamping block 61 are alternately disposed on the wall surface of the bottom section casing 11, so that the outer wall of the outer casing 13 and the inner wall forming an included angle with the outer wall are clamped between the outer clamping block 62 and the inner clamping block 61.
Further, in one possible implementation, due to the presence of the lateral clamping block set, to further improve the stability of the inner casing 12 and the bottom section casing 11, the lower end of the inner casing 12 is welded with the inner walls of the inner clamping block 61 and the bottom section casing 11 at the same time.
The radial restraining means may also be an annular groove formed in the upper end surface of the base ring casing 11, into which the lower end surface of the outer casing 13 is radially inserted, so that the outer casing 13 and the base ring casing 11 are radially restrained.
Further, in one possible implementation, the lower end of the outer casing 13 and the upper end of the bottom section casing 11 increase the supporting strength of the outer casing 13 and the bottom section casing 11 by increasing the wall thickness.
It should be noted that this embodiment also provides a bored pile construction method, through applying this bored pile construction method, can effectively solve in current conventional pile construction methods, most bored pile construction steel pile casings can't retrieve, causes extravagant problem.
Referring to fig. 4, the method for constructing the bored pile includes:
manufacturing the recyclable steel casing 10 for the bored pile construction in the technical scheme;
vibrating and sinking the recyclable steel casing 10 for bored pile construction to a designed depth;
drilling and filling pile construction is carried out on the inner pile casing 12;
after the cast-in-situ pile concrete reaches the strength requirement, the connection between the outer casing 13 and the inner casing 12 is released;
The outer casing 13 is pulled out.
After the outer casing 13 is pulled out, the outer casing 13 can be recycled, and the inner casing 12 and the bottom section casing 11 are supplemented by subsequent processing, so that another set of steel casing 10 for constructing the bored pile can be manufactured at low cost, thereby reducing the construction cost.
Among other possible construction methods, the cast-in-situ bored pile construction recyclable steel casing 10 is vibrated down to a design depth using a lifting apparatus and a vibratory hammer. The outer protective cylinder 13 is pulled out by adopting lifting equipment and a vibrating hammer for recycling.
Further, in one possible implementation, as shown in fig. 5, the bored pile construction method further includes: the annular receiving chamber 80 is filled with a filler 90 before the bored pile is constructed.
In one possible implementation, the filler 90 is sand, and the sand is densely filled in the annular receiving cavity 80.
Further, in one possible implementation, as shown in fig. 6, the bored pile construction method further includes: the filler 90 in the annular receiving chamber 80 is discharged by high pressure water before the outer casing 13 is pulled out.
A high-pressure pipe 70 may be disposed between the outer casing 13 and the inner casing 12, and the high-pressure pipe 70 may be connected to a high-pressure water source so that the high-pressure pipe 70 can discharge the filler 90 (e.g., sand) in the annular receiving chamber 80.
In one possible implementation, the steps of making the recycled steel casing 10 for bored pile construction include:
providing an inner casing 12, an outer casing 13 and a bottom section casing 11;
The upper end of the inner casing 12 is connected with the outer casing 13 by a pre-tightening connection removing device 14;
The lower end face of the outer protective cylinder 13 is abutted against the upper end face of the bottom section protective cylinder 11; the lower end of the inner casing 12 is fixedly connected with the bottom section casing 11.
In one possible implementation, to ensure the integrity of the steel casing 10, the step of manufacturing the steel casing 10 further includes:
An inner clip 61 and an outer clip 62 are respectively fixed to the inner wall and the outer wall of the bottom section casing 11, and the lower end of the outer casing 13 is commonly held by the inner clip 61 and the outer clip 62.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (4)
1. The utility model provides a drilling bored concrete pile construction recoverable steel protects a section of thick bamboo for drilling bored concrete pile construction, its characterized in that, drilling bored concrete pile construction recoverable steel protects a section of thick bamboo and includes:
A bottom section pile casing;
The lower end of the inner protective cylinder is fixedly connected with the bottom section protective cylinder;
the outer protective cylinder is sleeved outside the inner protective cylinder, an annular accommodating cavity is formed between the inner wall of the outer protective cylinder and the outer wall of the inner protective cylinder, a filler is arranged in the annular accommodating cavity, and the lower end face of the outer protective cylinder is abutted to the upper end face of the bottom section protective cylinder;
The inner protective cylinder, the outer protective cylinder and the bottom section protective cylinder are coaxially arranged;
The radial restraining device is used for restraining the lower end face of the outer casing and the upper end face of the bottom section casing in the radial direction and comprises at least one transverse clamping block group, each transverse clamping block group comprises an inner clamping block and an outer clamping block, the inner clamping block and the outer clamping block are respectively fixed on the inner wall and the outer wall of the bottom section casing, and the inner clamping block and the outer clamping block jointly clamp the lower end of the outer casing;
The pre-tightening connection dismantling device is characterized in that the upper end of the inner casing and the outer casing are pre-tightened and detachably connected through the pre-tightening connection dismantling device, the pre-tightening connection dismantling device comprises an anchoring piece and a fastening piece, one end of the anchoring piece is fixed on the inner wall of the outer casing, the fastening piece is arranged on the anchoring piece in a penetrating mode, and the fastening piece is abutted to the inner wall of the inner casing;
one end of the high-pressure pipe is used for connecting a high-pressure water source, the other end of the high-pressure pipe stretches into the annular accommodating cavity, and the high-pressure pipe is fixedly connected with the inner protective cylinder or the outer protective cylinder;
The construction method comprises the steps of constructing a bottom section pile casing, an inner pile casing, an outer pile casing, a radial constraint device and a pre-tightening connection dismantling device integrally, sinking the whole to the design depth of a drilled hole, constructing a bored pile for the inner pile casing, and after the bored pile concrete reaches the strength requirement, removing the connection between the inner pile casing and the outer pile casing, and pulling out the outer pile casing, wherein the inner pile casing, the bottom section pile casing and the bored pile are of an integrated structure.
2. A method of constructing a bored pile as set forth in claim 1, wherein the method comprises:
Manufacturing the recyclable steel casing for bored pile construction;
vibrating and sinking the recyclable steel casing for bored pile construction to the designed depth;
performing bored pile construction on the inner casing;
After the cast-in-situ pile concrete reaches the strength requirement, the connection between the outer casing and the inner casing is released;
Pulling out the outer casing;
Wherein, the step of making the recoverable steel casing of bored pile construction includes:
Providing the inner casing, the outer casing, and the bottom section casing;
The lower end face of the outer protection cylinder is abutted against the upper end face of the bottom section protection cylinder, the lower end face of the outer protection cylinder and the upper end face of the bottom section protection cylinder are restrained and fixed in the radial direction through the radial restraining device, an inner side clamping block and an outer side clamping block are respectively fixed on the inner wall and the outer wall of the bottom section protection cylinder, and the lower end of the outer protection cylinder is clamped together through the inner side clamping block and the outer side clamping block;
connecting the upper end of the inner casing with the outer casing through a pre-tightening connection dismantling device;
and fixedly connecting the lower end of the inner protective cylinder with the bottom section protective cylinder.
3. A method of constructing a bored pile according to claim 2, further comprising:
and filling the annular accommodating cavity with a filler before the bored pile is constructed.
4. A method of constructing a bored pile according to claim 3, further comprising:
And before the outer protective cylinder is pulled out, the filling material in the annular containing cavity is discharged by high-pressure water.
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| CN114215047A (en) * | 2021-12-15 | 2022-03-22 | 深圳市东深工程有限公司 | Underwater cast-in-situ bored pile and construction process |
| CN115142458A (en) * | 2022-07-27 | 2022-10-04 | 广州市市政工程设计研究总院有限公司 | Pile foundation capable of controlling horizontal deformation and construction method |
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