CN214118097U - Drilling rod for construction of expanded cast-in-place pile - Google Patents
Drilling rod for construction of expanded cast-in-place pile Download PDFInfo
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- CN214118097U CN214118097U CN202023340312.7U CN202023340312U CN214118097U CN 214118097 U CN214118097 U CN 214118097U CN 202023340312 U CN202023340312 U CN 202023340312U CN 214118097 U CN214118097 U CN 214118097U
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Abstract
The utility model discloses a drilling rod is used in hole enlargement bored concrete pile construction, establish outer tube, setting in the pole outside including interior pole, cover and be coaxial laying interior conical head and set up the hollow outer conical head in the conical head outside including outer tube bottom and parcel in pole bottom and interior pole in interior pole bottom, hollow outer conical head divides the board concatenation shaping by a plurality of arcs of laying along outer tube bottom circumference, still is provided with on the interior pole a plurality of flexible pushing mechanism that support pushing away the arc and divide the board outside the outside of tubes in pole circumference setting in interior pole along interior pole circumference, be provided with the connecting rod that is used for foldeing the arc and divide the board between the outside conical surface of interior conical head and the inner wall of arc branch board. The utility model discloses a setting can fold and open hollow outer conical head, can normally carry out the lower drilling construction of drilling rod when hollow outer conical head folds, when hollow outer conical head opens, can realize at the hole enlargement to fashioned straight hole to form the bored concrete pile of different external diameters, be used for improving the single pile bearing capacity.
Description
Technical Field
The utility model belongs to the technical field of the construction, concretely relates to drilling rod is used in construction of hole enlargement bored concrete pile.
Background
The cast-in-place pile is formed by directly forming a hole in a designed pile position, adding a reinforcement cage in the hole after the hole is formed, and pouring concrete. At present, in foundation engineering such as buildings, water conservancy projects, highways and the like, the long spiral hole-forming cast-in-place pile is widely applied with the advantages of high speed, low noise, no need of mud for wall protection, low construction cost and the like. The most adopted reinforced concrete bored piles for buildings are straight bored piles with equal cross sections. In the design of the pile foundation, the friction between the pile and the soil is improved by mostly adopting a method of increasing the diameter and the length of the pile, but the method does not fully utilize the strength of the pile body, so that the cost is high, and materials are wasted. In some soil layers which can well exert the bearing capacity of the pile, such as cohesive soil, silt, filling soil and the like, if the diameter of the soil layer cast-in-place pile can be properly increased, the bearing capacity of the pile body can be greatly improved under the condition that the consumption of concrete is only increased by a small amount. Therefore, there is a need for a drill rod for expanding cast-in-place pile construction, which can form drill holes with different outer diameters, thereby forming cast-in-place piles with different outer diameters for improving the bearing capacity of a single pile.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a drilling rod is used in hole enlargement bored concrete pile construction, its simple structure, reasonable in design can fold and open hollow outer cone through the setting, can normally carry out the lower drilling construction of drilling rod when hollow outer cone folds, when hollow outer cone opens, can realize at the hole enlargement to the fashioned straight hole to form the bored concrete pile of different external diameters, be used for improving the single pile bearing capacity.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a drilling rod is used in construction of hole enlargement bored concrete pile which characterized in that: the inner rod is also provided with a plurality of telescopic abutting and pushing mechanisms which are arranged in the inner rod along the circumferential direction of the inner rod and used for abutting and pushing the arc-shaped branch plates towards the outer side of the outer pipe, a connecting rod used for folding the arc-shaped branch plates is arranged between the outer side conical surface of the inner conical head and the inner wall of the arc-shaped branch plates, one end of the connecting rod is hinged with the outer side conical surface of the inner conical head, and the other end of the connecting rod is hinged with the inner wall of the arc-shaped branch plate; the number of the telescopic pushing mechanisms is the same as that of the arc-shaped branch plates, and the telescopic pushing mechanisms correspond to the arc-shaped branch plates one by one;
the top of arc divides the board to be connected with the outer tube bottom is articulated, and the equal butt of bottom of a plurality of arcs divides the board is on same point, and the outer tube outside is provided with the thread drill tooth.
The drill rod for the construction of the expanded cast-in-place pile is characterized in that: the telescopic pushing mechanism comprises a pushing head used for pushing the arc-shaped branch plate to the outer side of the outer pipe and a pushing oil cylinder used for controlling the pushing head to stretch.
The drill rod for the construction of the expanded cast-in-place pile is characterized in that: the arc divides board outside lower part to be provided with the sword tooth, the quantity of sword tooth is a plurality of, and the top of a plurality of sword teeth is all greater than the distance between outer wall and the interior pole axis of screw thread drill tooth when the arc divides the board to open and the distance between interior pole axis.
The drill rod for the construction of the expanded cast-in-place pile is characterized in that: the longitudinal section area of the pushing head is gradually reduced from the inner rod to the outer side of the inner rod.
The drill rod for the construction of the expanded cast-in-place pile is characterized in that: one end of the connecting rod is hinged to the upper portion of the outer side face of the inner conical head, and the other end of the connecting rod is hinged to the lower portion of the inner wall of the arc-shaped sub-plate.
The drill rod for the construction of the expanded cast-in-place pile is characterized in that: and grouting channels are arranged in the inner rod and the inner conical head.
The drill rod for the construction of the expanded cast-in-place pile is characterized in that: the included angle range of the fan-shaped cambered surface enclosed by the sidelines on the two sides of the arc-shaped division plate is 15-20 degrees.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses a set up flexible pushing mechanism and divide the arc to support to push away to the outer tube outside, simultaneously in the reaming construction in hole, flexible pushing mechanism still bears the soil body and divides the inboard thrust of board to the arc, guarantees the arc and divides the stability of holding position in the reaming construction in hole to guarantee that the fashioned hole of construction satisfies the construction quality requirement.
2. The utility model discloses a set up the connecting rod and give arc minute board an ascending pulling force when arc minute board folds in needs, make the arc minute board can get back to the position that originally folds the state, splice the hollow outer conical head of shaping again, in addition, the connecting rod can produce inside pulling force to arc minute board in the reaming construction in hole, to arc minute board outside centrifugal force at rotatory in-process in the reaming construction in offsetting the hole, guarantee the stability of drilling rod in the reaming work progress, guarantee the pore-forming quality.
To sum up, the utility model discloses simple structure, reasonable in design can fold and open hollow outer conical head through the setting, can normally carry out the lower drilling construction of drilling rod when hollow outer conical head folds, when hollow outer conical head opens, can realize at the hole enlargement to the fashioned straight hole to form the bored concrete pile of different external diameters, be used for improving the single pile bearing capacity.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a usage state diagram of the present invention.
Description of reference numerals:
1-an inner rod; 2-an outer tube; 3-inner cone head;
4-arc-shaped board splitting; 5-a connecting rod; 6-thread drilling teeth;
7-pushing the head; 8-pushing oil cylinder; 9-cutter teeth;
10-grouting channel.
Detailed Description
As shown in fig. 1 and 2, the utility model discloses an inner rod 1, cover establish at the outer tube 2 outside inner rod 1, set up at inner rod 1 bottom and with inner rod 1 be coaxial laying's interior conical head 3 and set up at outer tube 2 bottom and wrap up at the hollow outer conical head outside interior conical head 3, hollow outer conical head is spliced the shaping by a plurality of arc minute plates 4 that lay along outer tube 2 bottom circumference, still is provided with a plurality of along inner rod 1 circumference setting in inner rod 1 and be used for to the outer tube 2 outside to support the flexible mechanism of pushing away arc minute plate 4, be provided with the connecting rod 5 that is used for folding arc minute plate 4 between the outside conical surface of inner conical head 3 and the inner wall of arc minute plate 4, the one end of connecting rod 5 is connected with the outside conical surface of interior conical head 3 is articulated, and the other end of connecting rod 5 is connected with the inner wall of arc minute plate 4 is articulated;
the top of arc divides the board 4 to be connected with outer tube 2 bottom is articulated, and the equal butt of the bottom of a plurality of arcs divides the board 4 is on same point, and the outer tube 2 outside is provided with the thread drilling tooth 6.
In this embodiment, the number of the connecting rods 5 is plural, and the number of the connecting rods 5 is the same as that of the arc-shaped branch plates 4, and the connecting rods 5 correspond to the arc-shaped branch plates one by one.
In this embodiment, the inner rod 1 is controlled to ascend and descend in the outer tube 2 by a special lifting device, in addition, the pile machine drives the outer tube 2 and the lifting device to drill and lift the drill together, the lifting device is a jack, the fixed end of the jack is fixedly connected with the outer tube 2, and the extending end of the jack is fixedly connected with the inner rod 1.
In this embodiment, the connecting rod 5 has certain elasticity, so that the arc-shaped sub-plates 4 can be pushed outwards conveniently.
It should be noted that by arranging the hollow outer conical head which can be folded and unfolded, the drilling construction of the drill rod can be normally carried out when the hollow outer conical head is folded, and the diameter expansion of the formed straight hole can be realized when the hollow outer conical head is unfolded, so that the cast-in-place piles with different outer diameters are formed and the bearing capacity of a single pile is improved;
the arc-shaped sub-plates 4 are pushed towards the outer side of the outer pipe 2 by arranging the telescopic pushing mechanism, and meanwhile, in the hole reaming construction of the hole, the telescopic pushing mechanism also bears the inward pushing force of the soil body to the arc-shaped sub-plates 4, so that the stability of the arc-shaped sub-plates 4 in the position maintenance of the hole reaming construction is ensured, and the construction formed hole is ensured to meet the construction quality requirement;
give 4 ascending pulling forces of arc minute plate through setting up connecting rod 5 when needs fold arc minute plate 4, make arc minute plate 4 can get back to the position that originally folds the state, splice the hollow outer conical head of shaping again, in addition, connecting rod 5 can produce inside pulling force to arc minute plate 4 in the reaming construction in hole, to arc minute plate 4 is at rotatory in-process outside centrifugal force in the reaming construction in offsetting hole, guarantee the stability of drilling rod in the reaming construction process, guarantee the pore-forming quality.
In this embodiment, the telescopic pushing mechanism includes a pushing head 7 and a pushing cylinder 8 for controlling the pushing head 7 to stretch; the telescopic pushing mechanisms are the same in number with the arc-shaped branch plates 4 and correspond to the arc-shaped branch plates one by one.
In this embodiment, the pushing cylinder 8 is an oil cylinder, a through hole is formed in the position, matched with the telescopic pushing mechanism, of the inner rod 1, and the pushing cylinder 8 pushes the pushing head 7 outwards along the radius direction of the inner rod 1 so as to push the arc-shaped splitting plate 4.
In this embodiment, arc divides board 4 outside lower part to be provided with sword tooth 9, the quantity of sword tooth 9 is a plurality of, and the top of a plurality of sword teeth 9 all is greater than the distance between the outer wall of fluted drill tooth 6 and the interior pole 1 axis with the distance between the interior pole 1 axis when arc divides board 4 opens.
In the embodiment, when the arc-shaped sub-plates 4 are opened in place, the tops of the cutter teeth 9 are all positioned in the same vertical plane, so that the verticality of the hole walls of the diameter-expanding sections is ensured;
when rock and the like exist in the stratum needing hole expansion and the arc-shaped sub-plate 4 is not easy to open, the cutter tooth edges can be used for rotary drilling and expansion until the arc-shaped sub-plate 4 reaches the set position.
In this embodiment, the longitudinal cross-sectional area of the pushing head 7 gradually decreases from the inside of the inner rod 1 to the outside of the inner rod 1.
In this embodiment, the top surface that supports pusher 7 this moment is the inclined plane, avoids supporting pusher 7's top surface when the arc divides 4 openings to shelter from arc branch board 4 to can make the arc divide board 4 open the angle scope bigger, in order to satisfy different field demands.
In this embodiment, one end of the connecting rod 5 is hinged to the upper portion of the outer side surface of the inner conical head 3, and the other end of the connecting rod 5 is hinged to the lower portion of the inner wall of the arc-shaped sub-plate 4.
In the embodiment, the bottom of the connecting rod 5 inclines towards the inner side of the hollow outer conical head in the closing state of the arc-shaped sub-plates 4, and compared with the situation that the connecting rod 5 is in a vertical state, the arc-shaped sub-plates 4 can be closed better in the arrangement mode, and the arc-shaped sub-plates 4 are guaranteed to be kept in the closing state when a drill rod drills down.
In this embodiment, the inner rod 1 and the inner conical head 3 are both provided with grouting channels 10.
In this embodiment, the included angle range of the fan-shaped arc surface enclosed between the side lines at the two sides of the arc-shaped dividing plate 4 is 15-20 °.
When the utility model is in actual use, when the bottom of the expanding drill rod is in the depth of the design hole, the inner rod 1 moves downwards relative to the outer tube 2, so that the plurality of arc-shaped sub-plates 4 are unfolded towards the outer side of the outer tube 2, and meanwhile, the telescopic pushing mechanism extends out towards the outer side of the inner rod 1 to prevent the arc-shaped sub-plates 4 from retracting, and at the moment, the pile driver drives the expanding drill rod to rotate upwards to be lifted until the bottom of the arc-shaped sub-plates 4 is lifted to the design top of the expanding section pile body; when the pile body of the non-expanding section is constructed, the inner rod 1 moves upwards relative to the outer tube 2, the telescopic pushing mechanism retracts towards the inner side of the inner rod 1, the connecting rod 5 drives the arc-shaped sub-plates 4 to fold towards the inner side of the outer tube 2, and the pile driver drives the expanding drill rod to rotate and lift the length of the pile body of the non-expanding section to complete drilling construction.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (7)
1. The utility model provides a drilling rod is used in construction of hole enlargement bored concrete pile which characterized in that: comprises an inner rod (1), an outer tube (2) sleeved outside the inner rod (1), an inner conical head (3) arranged at the bottom of the inner rod (1) and coaxially arranged with the inner rod (1), and a hollow outer conical head arranged at the bottom of the outer tube (2) and wrapped outside the inner conical head (3), the hollow outer cone head is formed by splicing a plurality of arc-shaped branch plates (4) which are distributed along the circumferential direction of the bottom of the outer pipe (2), the inner rod (1) is also provided with a plurality of telescopic abutting-pushing mechanisms which are arranged in the inner rod (1) along the circumferential direction of the inner rod (1) and are used for abutting and pushing the arc-shaped branch plates (4) towards the outer side of the outer pipe (2), a connecting rod (5) used for folding the arc-shaped branch plate (4) is arranged between the outer conical surface of the inner conical head (3) and the inner wall of the arc-shaped branch plate (4), one end of the connecting rod (5) is hinged with the outer conical surface of the inner conical head (3), and the other end of the connecting rod (5) is hinged with the inner wall of the arc-shaped branch plate (4); the number of the telescopic pushing mechanisms is the same as that of the arc-shaped branch plates (4) and the telescopic pushing mechanisms correspond to the arc-shaped branch plates one by one;
the top of arc divides board (4) and outer tube (2) bottom to articulate and be connected, and the equal butt in the same point of bottom of a plurality of arc divides board (4), and the outer tube (2) outside is provided with thread drill tooth (6).
2. The drill rod for the construction of the expanded cast-in-place pile according to claim 1, wherein: the telescopic pushing mechanism comprises a pushing head (7) used for pushing the arc-shaped branch plate (4) to the outer side of the outer pipe (2) and a pushing oil cylinder (8) used for controlling the pushing head (7) to stretch.
3. The drill rod for the construction of the expanded cast-in-place pile according to claim 1, wherein: the arc divides board (4) outside lower part to be provided with sword tooth (9), the quantity of sword tooth (9) is a plurality of, and the top of a plurality of sword teeth (9) is divided board (4) when opening and is all greater than the distance between outer wall and interior pole (1) axis of screw thread drilling tooth (6) at the arc and the distance between interior pole (1) axis.
4. The drill rod for the construction of the expanded cast-in-place pile according to claim 2, wherein: the longitudinal section area of the pushing head (7) is gradually reduced from the inside of the inner rod (1) to the outside of the inner rod (1).
5. The drill rod for the construction of the expanded cast-in-place pile according to claim 1, wherein: one end of the connecting rod (5) is hinged to the upper part of the outer side surface of the inner conical head (3), and the other end of the connecting rod (5) is hinged to the lower part of the inner wall of the arc-shaped branch plate (4).
6. The drill rod for the construction of the expanded cast-in-place pile according to claim 1, wherein: and grouting channels (10) are arranged in the inner rod (1) and the inner conical head (3).
7. The drill rod for the construction of the expanded cast-in-place pile according to claim 1, wherein: the included angle range of the fan-shaped cambered surface enclosed by the side lines at the two sides of the arc-shaped sub-plate (4) is 15-20 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023340312.7U CN214118097U (en) | 2020-12-31 | 2020-12-31 | Drilling rod for construction of expanded cast-in-place pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023340312.7U CN214118097U (en) | 2020-12-31 | 2020-12-31 | Drilling rod for construction of expanded cast-in-place pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214118097U true CN214118097U (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023340312.7U Active CN214118097U (en) | 2020-12-31 | 2020-12-31 | Drilling rod for construction of expanded cast-in-place pile |
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| Country | Link |
|---|---|
| CN (1) | CN214118097U (en) |
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2020
- 2020-12-31 CN CN202023340312.7U patent/CN214118097U/en active Active
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