CN218757453U - Pile foundation construction is with protecting a section of thick bamboo device - Google Patents
Pile foundation construction is with protecting a section of thick bamboo device Download PDFInfo
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- CN218757453U CN218757453U CN202223087017.4U CN202223087017U CN218757453U CN 218757453 U CN218757453 U CN 218757453U CN 202223087017 U CN202223087017 U CN 202223087017U CN 218757453 U CN218757453 U CN 218757453U
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Abstract
The utility model discloses a pile foundation construction casing device, which comprises a casing component, wherein the casing component comprises at least two sections of casings, and the upper part of the next section of casing is sleeved in the lower part of the previous section of casing in sequence; supporting holes are formed in the side wall of the upper part of the casing, and cross bars penetrate into the supporting holes; the tail end of a cross bar of the first section of pile casing extends to the outer side of the edge of the pile foundation hole, and the tail ends of cross bars of the other sections of pile casings extend to the outer side of the edge of the outer wall of the upper section of pile casing respectively; the outer wall of the top of the first section of the protective cylinder is provided with a reinforcing belt, and the outer wall of the bottom of each section of the protective cylinder is provided with a groove which is inclined downwards from outside to inside; can be to complicated geological environment characteristic, simplify pile foundation construction processes, improve the efficiency of construction, and protect a subassembly and can make up the use in a flexible way according to the construction needs, improve the practicality.
Description
Technical Field
The utility model belongs to the technical field of the pile foundation construction, concretely relates to pile foundation construction is with protecting a section of thick bamboo device.
Background
At present, in the construction of pile foundations of bridges and the like, the problems of high quality requirements and high construction cost often exist, and the construction of the pile foundations of bridges and the like under complex geological conditions is difficult. Particularly, in areas such as southern China and the like, hills, valley lands, alluvial plains and the like are widely distributed, and due to the fact that the areas are rich in underground water, super-thick sand gravel soil layers, inclined rocks, bead karst caves and the like, geological conditions are complex, various construction adverse factors influence each other, and construction difficulty is increased.
The common modes of slurry dado pore-forming, grouting solidification back drilling, fabricated casing follow-up and the like in the prior art are only suitable for construction application under single geology, and have the problems of poor dado effect, difficulty in grouting amount control, uncontrollable pile foundation quality, difficulty in upward pulling and the like, the limitation is large when the complex geological construction is faced, and the quality and progress of pile foundation construction are seriously influenced.
SUMMERY OF THE UTILITY MODEL
To pile foundation construction among the prior art, the above-mentioned at least one aspect problem that exists in the pile foundation construction under the complicated geological conditions especially, the utility model provides a pile foundation construction is with protecting a section of thick bamboo device protects a section of thick bamboo subassembly through the multisection and protects a constitution, can simplify pile foundation construction process to complicated geological environment characteristic, improves the efficiency of construction to protect a section of thick bamboo subassembly and can make up the use in a flexible way according to the construction needs, improve the practicality.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pile foundation construction casing device comprises a casing component, wherein the casing component comprises at least two sections of casings, and the upper parts of the next section of casings are sequentially sleeved in the lower parts of the previous section of casings; supporting holes are formed in the side wall of the upper part of the pile casing, and cross bars penetrate into the supporting holes; the tail ends of the cross bars of the first section of pile casing extend to the outer side of the edge of a pile foundation hole, and the tail ends of the cross bars of the rest sections of pile casing respectively extend to the outer side of the edge of the outer wall of the upper section of pile casing; the outer wall of the top of the first section of the pile casing is provided with a reinforcing belt, and the outer wall of the bottom of each section of the pile casing is provided with a groove which is inclined downwards from outside to inside.
The protective cylinder component can be combined in multiple stages according to actual needs, the protective cylinder device can comprise at least two stages of protective cylinder components, and the upper part of the uppermost section of protective cylinder of the protective cylinder component of the next stage is sequentially sleeved in the lower part of the uppermost section of protective cylinder of the uppermost stage of the protective cylinder component of the previous stage.
The utility model discloses can reach following beneficial effect:
the utility model discloses a pile foundation construction is with protecting a device, it protects a subassembly and can include that the multisection protects a section of thick bamboo, can solve grouting amount out of control, pore-forming difficulty and hole collapse scheduling problem in traditional pile foundation construction to complicated geological environment characteristic, has simplified pile foundation construction process, has improved the efficiency of construction, and the practicality is stronger.
The utility model discloses a pile foundation construction is with protecting a section of thick bamboo device can include multistage fender section of thick bamboo subassembly, can effectively solve the complicated geology high-speed railway bridge pile foundation construction such as being rich in groundwater, super thick sand gravel soil layer, sloping rock and string of beads solution cavity and face groundwater, hole collapse, inclined hole, buried drill, protect a section of thick bamboo suddenly to sink, protect a section of thick bamboo deformation, concrete surpass side and become pile quality scheduling problem; compared with the protective cylinder structure in the prior art, the protective cylinder structure can effectively obstruct flowing underground water, prevent sand gravel layers from caving, and overcome the defects of hole deviation and the like caused by bead karst caves; can satisfy complicated geology bridge pile foundation construction demand, use in a flexible way, can accelerate pile foundation engineering time, improve the percentage of holes, practice thrift pile foundation construction cost, guarantee pile foundation quality.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
fig. 1 is a schematic structural view of a casing device for pile foundation construction according to an embodiment of the present invention;
fig. 2 is a schematic view of a cross bar structure of the pile foundation construction casing device according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a first pile casing of a pile foundation construction casing device according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of the pile foundation construction casing device except for the first casing section.
Reference numbers in the figures: 1 is for protecting a section of thick bamboo, 101 is the first section and protects a section of thick bamboo, 102 is the second section and protects a section of thick bamboo, 103 is that the third section protects a section of thick bamboo, 2 is the supported hole, 3 is the whippletree, 4 is the reinforcing band, 5 is the groove, 6 is pile foundation hole open-top both sides ground.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to limit the invention to the precise embodiments disclosed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Examples
Referring to fig. 1, a pile foundation construction casing device comprises a casing assembly, wherein the casing assembly comprises at least two casing sections 1, and the upper part of the next casing section 1 is sequentially sleeved in the lower part of the previous casing section 1; referring to fig. 2, supporting holes 2 are formed in the side walls of the upper portion of the casing 1, and horizontal bars 3 penetrate through the supporting holes 2; the tail ends of the cross bars 3 of the first section of pile casings 101 extend to the outer side of the edge of the pile foundation hole, and the tail ends of the cross bars 3 of the other sections of pile casings 1 respectively extend to the outer side of the edge of the outer wall of the first section of pile casing 1; referring to fig. 3, the outer wall of the top of the first section of casing 101 is provided with a reinforcing band 4, and referring to fig. 4, the outer wall of the bottom of each section of casing 1 is provided with a groove 5 which is inclined downwards from outside to inside.
Fig. 1 shows the structure of the pile foundation construction casing device of the present embodiment by taking three-section casing 1 as an example. Fig. 2 shows a structure of a bar 3 inserted into the support holes 2 of the respective casing sections 1. Fig. 3 shows the structure of the first casing section 101. Fig. 4 shows the structure of each of the casing segments 1 other than the first casing segment 101, for example, a second casing segment 102, a third casing segment 103, and the like.
As shown in fig. 1 to 4, the casing 1 of the casing device for pile foundation construction has a three-stage structure. The three-section pile casing 1 comprises a first section pile casing 101 at the top, a second section pile casing 102 in the middle and a third section pile casing 103 at the bottom, wherein the upper part of the second section pile casing 102 extends into the lower part of the first section pile casing 101, and the upper part of the third section pile casing 103 extends into the lower part of the second section pile casing 102. The three-section pile casing 1 forms a vertical section structure of the integral pile casing device.
The top of each section of protective cylinder 1 is provided with no bevel 5, and the bottom is provided with a bevel 5, so that the welding and the vibration sinking are convenient.
When the pile foundation is constructed, a worker can firstly shake and sink the first section of casing 101 according to the geological condition. After the hole is formed by rotary drilling, the second protective cylinder 102 is lengthened section by section through the transverse bar 3 penetrating through the supporting hole 2 of the first protective cylinder 101, the second protective cylinder 102 is placed in the first protective cylinder 101, and after the second protective cylinder 102 is vibrated and sunk, the hole is formed by rotary drilling. And then lengthening the third section of protective cylinder 103 section by section through a transverse bar 3 penetrating through a supporting hole 2 of the second section of protective cylinder 102, placing the third section of protective cylinder 103 in the second section of protective cylinder 102, and performing rotary drilling to form a hole after the third section of protective cylinder 103 is vibrated and sunk. And then after the pouring of the pile foundation concrete is finished, the three sections of pile casings 1 are kept in the pile foundation hole, and the second section of pile casing 102 and the first section of pile casing 101 are pulled out section by section to finish the pouring of the pile foundation.
With reference to fig. 1 to 4, since the cross bar 3 of the first pile casing 101 is cross-arm on the ground 6 on two sides of the top opening of the pile foundation hole, the length of the cross bar 3 of the first pile casing 101 may be greater than the inner diameter of the pile foundation hole, i.e. greater than the outer diameter of the foundation pile, and the lengths of the cross bars 3 of the remaining pile casings 1 may be greater than the outer diameter of the previous pile casing 1. For example, the length of the cross bar 3 of the first pile casing 1 is 0.6m larger than the inner diameter of the pile foundation hole, and the length of the cross bar 3 of the rest pile casings 1 can be 0.6m larger than the outer diameter of the previous pile casing 1.
Supporting holes 2 are formed in the side walls of the two sides of the upper portion of each section of protective cylinder 1, and the cross bars 3 of each section of protective cylinder 1 penetrate through the supporting holes 2 on the two sides of the cross bar respectively. The transverse center lines of the support holes 2 at the two sides of the pile casing 1 can be superposed. The support holes 2 on both sides can be located on the horizontal section of the casing 1, and the connecting line of the centers of the support holes 2 on both sides passes through the center of the horizontal section. When the protective cylinder 1 is a cylinder, the connecting line of the centers of the supporting holes 2 at the two sides passes through the center of the circular horizontal section.
3 both ends of the cross bar of a first section of casing 1 can all extend to the pile foundation hole edge outside, and 3 both ends of the cross bar of all the other sections of casings 1 can all extend to the edge outside of the outer wall of a section of casing 1.
The reinforcing belt 4 may be an endless steel belt. The reinforcing band 4 can be sleeved and welded on the top outer wall of the first section of casing 101. The top end of the reinforcing belt 4 can be flush with the top end of the first section of casing 1. The support holes 2 of the first casing section 1 may be located below the reinforcing belt 4.
When the casing 1 is cylindrical, the reinforcing belt 4 may be circular. The reinforcing belt 4 and the vertical center line of the section of casing 101 can be coincident.
The groove 5 can be prefabricated at the bottom of each section of the protective cylinder 1 and can be an annular inverted cone inclined plane. The vertical central axis of the protective cylinder 1 and the bevel 5 can be coincided. The included angle between the bevel 5 and the horizontal plane can be 45 degrees.
The protective cylinders 1 can be vertical round tubes. The support holes 2 may each be a transverse circular through hole. The bar 3 may be a transverse cylindrical steel rod. The vertical central lines of the sections of the casing 1 can be overlapped. The vertical center lines of the sections of the casing 1 and the reinforcing belt 4 can be coincident. The transverse centre line of each bar 3 may coincide with the transverse centre line of the support hole 2 through which it passes. The vertical center line of each section of the casing 1 can be vertical to the transverse center line of the cross bar 3.
As shown in fig. 1, the transverse center line of the support hole 2 of the first section of casing 101 is perpendicular to the transverse center line of the support hole 2 of the second section of casing 102, and the transverse center line of the support hole 2 of the second section of casing 102 is parallel to the transverse center lines of the support holes 2 of the rest of the casings 1.
Alternatively, the transverse centerlines of the support holes 2 on the guard cylinders 1 may be parallel.
With combined reference to fig. 1 to 4, the inner diameter of the previous pile casing 1 may be greater than or equal to the outer diameter of the foundation pile or the outer diameter of the next pile casing 1, respectively. For example, the inner diameter of the first casing section 101 may be 0.2m larger than the outer diameter of the pile foundation or than the outer diameter of the second casing section 102, and the inner diameter of the second casing section 102 may be 0.2m larger than the outer diameter of the foundation pile or than the outer diameter of the third casing section 103. The inner diameter of the third casing 103 may be 0.2m larger than the outer diameter of the foundation pile.
Each section of casing 1 can be made of steel plates and can be 6m in length. The top welded reinforcement strip 4 may have a vertical width of 100mm and a wall thickness of 10mm. The wall thickness of the first and second casing segments 1 and 2 may be 16mm, and the wall thickness of the third casing segment 103 may be 14mm.
The length of each section of protective cylinder 1 can be less than or equal to the length of the cross bar 3. For example, each bar 3 may have a length 0.6m longer than the length of the casing 1.
The diameter of the supporting hole 2 of each section of casing 1 can be more than 1.5 times of the outer diameter of the cross bar 3 passing through the inside of the casing. For example, the support hole 2 may have a diameter of 100mm, and the bar 3 may have a diameter of 50mm.
In some embodiments, the casing device comprises at least two stages of casing assemblies, and the upper part of the uppermost casing 1 of the next stage of casing assembly is sequentially sleeved on the lower part of the uppermost casing 1 of the previous stage of casing assembly. Namely, the second-stage casing component is positioned above the first-stage casing component, the third-stage casing component is positioned above the second-stage casing component, and the rest is done in the same way; in each stage of the casing assembly, the first section of casing assembly 101 is located above the second section of casing assembly 102, the second section of casing assembly 102 is located above the third section of casing assembly 103, and so on.
When the complex geological bridge pile foundation is constructed, different pile casing 1 combination schemes can be selected according to the actual geological condition of the site selection of the pile foundation. Taking super thick sand ovum gravel layer and two layers of string of beads solution cavity as an example, the section of thick bamboo device that protects of adoption includes that tertiary protects a section of thick bamboo subassembly, and every grade protects a section of thick bamboo subassembly and includes that two sections protect a section of thick bamboo 1, includes following step:
the first-stage vibration sinking of the subsection protects a section of thick bamboo subassembly: after the pile position is determined by measuring lofting, a first section of casing 101 with the inner diameter of 1.6m, the length of 6m and the wall thickness of 16mm is lowered by using a drawing machine; drilling to the bottom of a pile casing by adopting a rotary drilling rig, after the first pile casing 101 is sunk, aligning the groove 5 of the second pile casing 102 with the top of the first pile casing 101, enabling the interfaces of the two pile casings 1 to be parallel and level, welding the second pile casing 102, and splicing the lengths of the two pile casings 1 of the first-stage steel pile casing assembly to be 12m; when the second protective cylinder 102 is welded, a steel plate with the thickness of 10mm is fixed on the inner side of the first protective cylinder 101 as a backing plate, and then CO is used 2 The gas shield welding is divided into four times of welding, the thickness of each welding can be the wall thickness of the second protective cylinder 102, for example, the wall thickness can be 6mm, and the welding seam is checked after the welding is finished; and pressing the first-stage casing assembly to an appointed position by using a pulling machine, drilling to the bottom of the first-stage casing assembly by using a rotary drilling rig again, and finally vibrating and sinking the first-stage casing assembly to the bottom of the dissolving tank of the gravel layer of the sand gravel layer, so that the first-stage casing assembly is completely transferred.
Dig the pore-forming soon, can adopt the drill bit diameter to bore through first layer solution cavity roof for 1.4m soon, get into the first layer solution cavity after, transfer the second level and protect a subassembly: the inner diameter of a second-stage casing 102 of the second-stage casing assembly can be 1.4m, the length of the first-stage casing 101 and the second-stage casing 102 can be 6m, and the wall thickness can be 16mm; after a first section of protection cylinder 101 of a second-stage protection cylinder assembly is lowered to a proper position, a cross bar 3 of the first section of protection cylinder 101 of the second-stage protection cylinder assembly penetrates through a supporting hole 2 and is transversely arranged on the first section of protection cylinder 101 of the first-stage protection cylinder assembly, a groove 5 of a second section of protection cylinder 102 of the second-stage protection cylinder assembly is placed at the top of the first section of protection cylinder 101 of the second-stage protection cylinder assembly and is welded and connected with the second section of protection cylinder 102, the whole splicing length of the second-stage protection cylinder assembly is made to be 12m, then the second section of protection cylinder assembly is lowered continuously, the process is repeated until the second-stage protection cylinder assembly is lowered into the first-layer karst cave, then a rotary drilling rig is adopted to continue drilling, the second-stage protection cylinder assembly is lowered while drilling, until the second-stage protection cylinder assembly penetrates through the karst cave to a bottom plate at the bottom of the karst cave, and the lower part of the second-stage protection cylinder assembly is finished.
Dig soon and continue to creep into and pass second floor solution cavity roof to the second floor solution cavity in, transfer the third level and protect a section of thick bamboo subassembly: the inner diameter of the second casing 102 of the third-stage casing assembly can be 1.2m, the length of the first casing 101 and the second casing 102 can be 6m, and the wall thickness can be 14mm; after a first section of protection cylinder 101 of a third-stage protection cylinder assembly is placed in place, a cross bar 3 of the first section of protection cylinder 101 penetrates through a supporting hole 2, the cross bar is placed on the first section of protection cylinder 101 of the first-stage protection cylinder assembly, a groove 5 of a second section of protection cylinder 102 of the third-stage protection cylinder assembly is placed at the top of the first section of protection cylinder 101, the second section of protection cylinder 102 is connected in a welding mode and then continues to be placed, the operation is repeated in the above mode until the third-stage protection cylinder assembly is placed in a second-layer karst cave, then a rotary drilling rig is used for continuing drilling, the protection cylinder assemblies are placed at all stages while drilling is carried out until the third-stage protection cylinder assembly penetrates through the karst cave to a bottom plate at the bottom of the karst cave, the third-stage protection cylinder assembly is placed completely, and the protection cylinder assemblies at all stages are placed completely.
And after the lowering of the pile casing assemblies at all levels is finished, continuously drilling to the elevation of the pile bottom. Before the concrete is poured to the initial set, the first-stage protective cylinder component and the second-stage protective cylinder component are pulled out, and the third-stage protective cylinder component is left without being pulled out.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. The pile foundation construction pile casing device is characterized by comprising a pile casing assembly, wherein the pile casing assembly comprises at least two pile casings, and the upper part of the next pile casing is sequentially sleeved in the lower part of the previous pile casing; supporting holes are formed in the side wall of the upper part of the casing, and cross bars penetrate into the supporting holes; the tail ends of the cross bars of the first section of pile casing extend to the outer side of the edge of a pile foundation hole, and the tail ends of the cross bars of the rest sections of pile casing respectively extend to the outer side of the edge of the outer wall of the upper section of pile casing; the outer wall of the top of the first section of the casing is provided with a reinforcing belt, and the outer wall of the bottom of each section of the casing is provided with a groove which is inclined downwards from outside to inside.
2. A pile foundation construction casing device according to claim 1, wherein the casing device comprises at least two stages of the casing assemblies, and an uppermost section of the casing upper portion of the casing assembly of a next stage is sequentially fitted into an uppermost section of the casing lower portion of the casing assembly of a previous stage.
3. A pile casing device according to claim 1 or 2, wherein the support holes are formed in both side walls of the upper part of each section of the casing, and the cross bar of each section of the casing passes through the support holes on both sides of the casing.
4. The pile foundation construction casing device according to claim 3, wherein the length of the cross bar of the first section of casing of each stage of the casing assembly is greater than the inner diameter of a pile foundation hole, and the length of the cross bar of the remaining sections of the casing is greater than the outer diameter of the previous section of the casing.
5. A casing device for pile foundation construction according to claim 3, wherein the inner diameter of the casing in the previous section of each stage of the casing assembly is greater than or equal to the outer diameter of the pile foundation or the outer diameter of the casing in the next section.
6. A casing device for pile foundation construction according to claim 1 or 2, wherein the reinforcing band is an annular steel band.
7. A casing device for pile foundation construction according to claim 6, wherein the support hole of the casing of the first section is located below the reinforcing strip.
8. A casing device for pile foundation construction according to claim 6, wherein the reinforcement strip tip is flush with the first section casing tip.
9. A casing device for pile foundation construction according to claim 1 or 2, wherein the groove is an annular inverted cone inclined surface.
10. The pile foundation construction casing device according to claim 1 or 2, wherein the included angle between the bevel slope and the horizontal plane is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223087017.4U CN218757453U (en) | 2022-11-21 | 2022-11-21 | Pile foundation construction is with protecting a section of thick bamboo device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223087017.4U CN218757453U (en) | 2022-11-21 | 2022-11-21 | Pile foundation construction is with protecting a section of thick bamboo device |
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| CN218757453U true CN218757453U (en) | 2023-03-28 |
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| CN202223087017.4U Active CN218757453U (en) | 2022-11-21 | 2022-11-21 | Pile foundation construction is with protecting a section of thick bamboo device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116733048A (en) * | 2023-08-10 | 2023-09-12 | 中建四局建设发展有限公司 | Pile splicing structure of soft soil foundation filling pile and construction method thereof |
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2022
- 2022-11-21 CN CN202223087017.4U patent/CN218757453U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116733048A (en) * | 2023-08-10 | 2023-09-12 | 中建四局建设发展有限公司 | Pile splicing structure of soft soil foundation filling pile and construction method thereof |
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