Stone column tip

Abstract

The present application relates to a kind of gravel pile tip, the tapered pile tip part can greatly improve the efficiency of piling, when piling, driving source is driven pile diameter adjusting frame moves down, make pile petal open around pile diameter adjusting frame, make outer diameter increase, further make pile petal and gravel pile bottom be in abutment, facilitate gravel pile driving pile with pile tip, when piling is completed, driving source is driven pile diameter adjusting frame moves up, make pile petal be pulled to relatively close by movable link, make outer diameter reduce, make the outer edge of pile petal be less than the inner diameter of gravel pile, after directly through hook or sling etc. Mode, the pile tip is taken out from the inside of gravel hammer, after the pile tip is taken out, the position of pile bottom becomes maximum directly, after pouring into gravel, directly fall into below, improve engineering construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stone column, in particular to a stone column tip. BACKGROUND

[0002] The stone column is a composite foundation reinforcement pile made of gravel (pebbles) as the main material. The stone column and sand pile are collectively referred to as granular pile or coarse-grained soil pile abroad. The so-called granular pile refers to a pile without cohesive strength. The composite foundation composed of granular pile such as stone column or sand pile and soil between piles is also called granular pile composite foundation. The widely used stone column, sand pile, and slag pile composite foundation at home and abroad are all granular pile composite foundations. The principle is to extrude the pile pipe with a tip at the bottom into the stratum by vibration or impact load, and after the hole is formed in the soft foundation, the gravel is poured into the pile pipe from the pouring port, and then the pile pipe is pulled out while being compacted, forming a dense stone column, and forming a composite foundation together with the soil around the pile. However, due to the structural limitation of the existing tip, the opening is too small, which hinders the falling of gravel when the gravel passes through the tip from the pile pipe, greatly affecting the construction efficiency. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a stone column tip to solve the above problems of the prior art.

[0004] To achieve the above object, the present application provides the following technical scheme: a stone column tip, comprising a tip part arranged at the bottom of the stone column and a pile diameter part matched with the stone column, characterized in that: a driving source is arranged at the center of the tip part, one end of the driving source is connected with the tip part, and the other end is provided with a pile diameter adjusting frame, the pile diameter part comprises at least two pile petals arranged circumferentially around the pile diameter adjusting frame, a plurality of movable hinge seats corresponding to the pile petals are arranged on the pile diameter adjusting frame, a plurality of fixed hinge seats corresponding to the pile petals are arranged at one end of the tip part facing the pile petals, a fixed connecting plate corresponding to the fixed hinge seat is arranged at one end of each pile petal, and a movable connecting plate corresponding to the movable hinge seat is arranged at the other end of each pile petal, a movable connecting rod is arranged between the movable connecting plate and the movable hinge seat, and both ends of the movable connecting rod are hingedly connected with the movable connecting plate and the movable hinge seat. The driving source drives the pile diameter adjusting frame to axially ascend and descend, thereby controlling the pile petals to open or close relative to the pile diameter adjusting frame.

[0005] Adopt the above technical scheme, the tapered pile tip improves the piling efficiency, and when piling, the driving source drives the pile diameter adjusting frame to move downward, the pile petal is opened around the pile diameter adjusting frame, the outer diameter is increased, and then the pile petal is abutted with the gravel pile bottom, the gravel pile drives the pile tip to pile conveniently, when the piling is completed, the driving source drives the pile diameter adjusting frame to move upward, the pile petal is pulled to the relative closing by the movable connecting rod, the outer diameter is reduced, the outer edge of the pile petal is smaller than the inner diameter of the gravel pile, the pile tip is taken out from the inside of the gravel hammer directly through the hook or the lifting rope and the like, after the pile tip is taken out, the pile bottom position becomes the maximum directly, the gravel is poured in and falls into the lower part directly, and the engineering construction efficiency is improved.

[0006] The gravel pile pile tip can be further provided with a lifting frame at the end of the pile diameter adjusting frame away from the driving source.

[0007] The above technical scheme is adopted, the lifting frame is arranged, the pile tip is directly taken out from the inside of the gravel pile through the lifting rope when the pile tip is recycled.

[0008] The gravel pile pile tip can be further provided with a bearing block abutting against the gravel pile at the end of the pile petal away from the pile tip.

[0009] The above technical scheme is adopted, the bearing block is arranged, the contact area with the gravel pile is increased, the gravel pile directly acts on the bearing block when piling, the stability when piling is improved, and the rest of the pile tip is prevented from being damaged due to stress.

[0010] The gravel pile pile tip can be further provided with a limiting plate at the end of the bearing block toward the pile diameter adjusting frame, one end of the limiting plate is fixedly connected with the pile petal, and the other end extends above the bearing block, so that the limiting plate and the bearing block cooperate to form a bearing limiting surface.

[0011] The above technical scheme is adopted, the limiting plate and the bearing block cooperate to form the bearing limiting surface, the limiting plate of each pile petal cooperates to form a ring abutting against the inner wall of the gravel pile, the bottom pipe diameter of the gravel pile abuts against the bearing block, and the limiting plate abuts against the inner wall of the gravel pile when piling, so that the gravel pile and the pile tip are prevented from slipping off during the piling process, and the pile tip is prevented from being damaged.

[0012] The gravel pile pile tip can be further provided with a protective cover at the end of the pile diameter adjusting frame away from the driving source, a lifting rope hole corresponding to the lifting frame is formed in the protective cover, and a clearance groove corresponding to the limiting plate is arranged on the outer circumferential surface of the protective cover.

[0013] By adopting the above technical solution, a protective cover is set up so that the hoisting rope can be connected to the hoisting frame through the hoisting rope hole, and a clearance groove is set up so that the limiting plate can enter the protective cover when the pile petals are retracted. When the pile tip is working or being retrieved, external gravel or soil will enter the pile tip, affecting the pile tip's operation or retrieval.

[0014] The aforementioned crushed stone pile tip can be further configured such that: the pile tip is conical, the driving source is a hydraulic cylinder, and the two ends of the hydraulic cylinder are respectively hinged to the pile tip and the pile diameter adjustment frame.

[0015] The above technical solution improves pile driving efficiency with its tapered pile tip, and the hydraulic cylinder can introduce hydraulic oil through the inner tube of the crusher, increasing the output force of the drive source. It features a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement.

[0016] The aforementioned crushed stone pile tip can be further configured such that: the pile tip is provided with a driving groove that is lower than the horizontal plane of the fixed hinge seat, and the driving groove is provided with a driving hinge seat for the driving source to hinge.

[0017] By adopting the above technical solution, one end of the drive source can be hinged in the drive groove below the horizontal plane of the pile tip, thereby reducing the center of gravity when the drive source drives the pile diameter adjustment frame to descend axially and improving the load-bearing capacity of the drive source.

[0018] The aforementioned crushed stone pile tip can be further configured such that: the number of fixed connecting plates for each pile segment is 2, the number of movable connecting plates for each pile segment is 1, the movable connecting plate is disposed between the two fixed connecting plates, and the center line connecting them forms a triangle.

[0019] By adopting the above technical solution, the center line connecting the movable connecting plate and the fixed connecting plate forms a triangle, which stably connects the pile segment to the fixed hinge seat and the movable hinge seat, preventing the pile segment from tilting and improving the stability and load-bearing capacity of the pile segment during opening and closing.

[0020] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention in the open state.

[0022] Figure 2 This is a cross-sectional view of an embodiment of the present invention in its open state.

[0023] Figure 3 This is a partial structural diagram of an embodiment of the present invention in the open state.

[0024] Figure 4 This is a three-dimensional schematic diagram of the pile segment according to an embodiment of the present invention.

[0025] Figure 5 This is a three-dimensional schematic diagram of the present invention after the protective cover has been removed in the open state, according to an embodiment of the invention.

[0026] Figure 6 This is a three-dimensional schematic diagram of an embodiment of the present invention in the closed state.

[0027] Figure 7 This is a cross-sectional view of an embodiment of the present invention in the closed state.

[0028] Figure 8 This is a three-dimensional schematic diagram of the present invention after the protective cover is removed in the closed state, according to an embodiment of the invention. Detailed Implementation

[0029] like Figures 1-8 As shown, a crushed stone pile tip includes a pile tip 1 located at the bottom of the crushed stone pile and a pile diameter section 2 that cooperates with the crushed stone pile. A hydraulic cylinder 3 is located at the center of the pile tip 1, with its two ends hinged to the pile tip 2 and a pile diameter adjustment frame 4, respectively. The pile diameter section 2 includes eight pile petals 5 arranged circumferentially around the pile diameter adjustment frame 4. The pile diameter adjustment frame 4 has eight equidistant movable hinge seats 41 corresponding to the pile petals 5. One end of the pile tip 1 facing each pile petal 5 is provided with a... Each pile segment 5 has two fixed hinge seats 11 corresponding to its corresponding pile segment 5. One end of each pile segment 5 has two fixed connecting plates 51 corresponding to the fixed hinge seats 11, and the other end has a movable connecting plate 52 corresponding to the movable hinge seat 41. The movable connecting plate 52 is positioned between the two fixed connecting plates 51, and the center line connecting the three forms a triangle. A movable connecting rod 6 is provided between the movable connecting plate 52 and the movable hinge seat 41. The two ends of the movable connecting rod 6 are respectively connected to the movable connecting plate 52 and the movable hinge seat 41. The connecting seat 41 is hinged. The hydraulic cylinder 3 drives the pile diameter adjustment frame 4 to move axially up and down, thereby controlling the pile petals 5 to open or close relative to the pile diameter adjustment frame 4. The end of the pile diameter adjustment frame 4 away from the hydraulic cylinder 3 is provided with a hoisting frame 42. The end of each pile petal 5 away from the pile tip 1 is provided with a bearing block 53 that abuts against the crushed stone pile. The end of each bearing block 53 facing the pile diameter adjustment frame 4 is provided with a limiting plate 54. One end of the limiting plate 54 is fixedly connected to the pile petal 5, and the other end extends above the bearing block 53, so that the limiting plate... 54 and the bearing block 53 cooperate to form the impact limiting surface a. The end of the pile diameter adjusting frame 4 away from the hydraulic cylinder 3 is provided with a protective cover 7. The protective cover 7 is provided with a lifting rope hole 71 corresponding to the lifting frame 42. The outer peripheral surface of the protective cover 7 is provided with a relief groove 72 corresponding to the limiting plate 54. The pile tip 1 is conical. The pile tip 1 is provided with a driving groove 12 that is lower than the horizontal plane of the fixed hinge seat 11. The driving groove 12 is provided with a driving hinge seat 13 for the hydraulic cylinder 3 to hinge.

[0030] likeFigures 1-5 As shown, during pile driving, the hydraulic oil pipe and the lifting rope pass through the inner diameter of the rubble pile and are connected with the hydraulic cylinder 3 and the lifting frame 42, at this time the hydraulic cylinder 3 drives the pile diameter adjusting frame 4 to move downward, then the movable hinged seat 41 also pulls the movable connecting rod 6 to move downward, so that the movable connecting rod 6 gradually approaches the horizontal line of the movable connecting plate 52, and then the pile petals 5 are opened with the fixed connecting plate 51 as the fulcrum, thereby expanding the diameter of the outer edge of the pile tip, so that the pipe diameter of the rubble pile abuts against the bearing block 53, and the limiting plate 54 abuts against the inner wall of the rubble pile to limit, that is, to avoid sliding during pile driving, and the pile tip is limited and fixed with the rubble pile, at this time the rubble pile cooperates with the pile tip, and the external soil is blocked by the rubble pile and the pile petals 5.

[0031] As shown in the figure, Figures 6-8 After the pile driving is completed, the hydraulic cylinder 3 drives the pile diameter adjusting frame 4 to move upward, and the movable hinged seat 41 also pulls the movable connecting rod 6 to move upward, so that the movable connecting rod 6 gradually moves away from the horizontal line of the movable connecting plate 52, and then the pile petals 5 are folded with the fixed connecting plate 51 as the fulcrum, thereby reducing the diameter of the outer edge of the pile tip, so that the pipe diameter of the rubble pile is separated from the bearing block 53, at this time the pile tip is separated from the rubble pile, and the pile tip can be taken out from the inside of the rubble pile by pulling the lifting rope, and after the rubble is poured, the pouring speed can be greatly improved without the limitation of the pile tip, and after the pouring is completed, the pile is pulled out, thereby improving the construction speed of the whole project.

Claims

1. A stone column tip comprising a tip portion provided at a bottom of a stone column and a shaft portion engaged with the stone column, characterized in that: The pile tip part is provided with a driving source, one end of the driving source is connected with the pile tip part, and the other end is provided with a pile diameter adjusting frame, the pile diameter part includes at least two pieces of pile petals which are arranged circumferentially around the pile diameter adjusting frame, a plurality of movable hinge seats corresponding to the pile petals are arranged on the pile diameter adjusting frame, a plurality of fixed hinge seats corresponding to the pile petals are arranged on one end of the pile tip part facing the pile petals, one end of each of the pile petals is provided with a fixed connecting plate corresponding to the fixed hinge seat, the other end of each of the pile petals is provided with a movable connecting plate corresponding to the movable hinge seat, a movable connecting rod is arranged between the movable connecting plate and the movable hinge seat, and the two ends of the movable connecting rod are hingedly connected with the movable connecting plate and the movable hinge seat.

2. A stone column tip as claimed in claim 1, wherein: The pile diameter adjusting frame is provided with a protection cover at the end away from the driving source, a lifting rope hole corresponding to the lifting frame is formed in the protection cover, and a position giving groove corresponding to the limiting plate is arranged on the outer circumferential surface of the protection cover.

3. A stone column tip according to any one of claims 1-2, characterized in that: The pile tip part is conical, and the driving source is a hydraulic oil cylinder.

4. A stone column tip as claimed in claim 3, wherein: The pile tip part is provided with a driving recess lower than the horizontal plane of the fixed hinge seat, and a driving hinge seat for hingedly connecting the driving source is arranged in the driving recess.

5. A stone column tip according to any one of claims 1-2, characterized in that: The number of the fixed connecting plates of each pile petal is 2, the number of the movable connecting plates of each pile petal is 1, the movable connecting plate is arranged between the two fixed connecting plates, and the central line of the movable connecting plate is triangular.

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