Soft soil stratum cast-in-situ bored pile construction device

Abstract

The invention provides a soft soil stratum cast-in-situ bored pile construction device, and belongs to the technical field of cast-in-situ bored pile construction. Comprising a construction base, a tamping punching structure is installed on the lower wall face of the construction base, two sets of shock-proof connecting structures are installed on the upper wall face of the construction base, a hoisting structure is installed on the upper wall faces of the two sets of shock-proof connecting structures, and a tamping power structure is installed on the lower wall face of the hoisting structure; according to the device, the winch drives the tamping hammer to lift, then the tamping hammer hammers the construction ground under the action of gravity, the land is compacted through the land tamping mode and the downward pressure from top to bottom, and therefore the hole diameter of punched holes cannot be affected; the device can punch holes and tamp the land at the same time, the center of the tamped land coincides with a punching pipeline, the land tamping accuracy is guaranteed, punching and land tamping are conducted at the same time, and the construction efficiency is improved to a certain degree.

Description

Technical Field

[0001] The invention belongs to the technical field of bored pile construction, and in particular relates to a bored pile construction device for soft soil strata. Background Art

[0002] Bored pile construction involves creating a pile hole in the ground through mechanical drilling, steel pipe extrusion, or manual excavation. A steel cage is then placed in the hole and poured with concrete to form the pile foundation. The core process includes site leveling, surveying and positioning, casing installation, mud preparation, mechanical drilling, hole cleaning, cage hoisting and positioning, and continuous underwater concrete pouring. This method is suitable for a variety of geological conditions and offers advantages such as low construction vibration, low noise, large pile diameter, and high bearing capacity. However, construction quality is easily affected by factors such as mud management, concrete pouring continuity, and hole cleaning. Strict control is required at each stage to ensure pile integrity and bearing capacity.

[0003] The main impacts of soft soil (such as silt and silty clay) on bored pile construction include: poor borehole wall stability, prone to necking or collapse. This requires the use of high-density slurry and strict control of drilling speed to maintain effective wall protection, especially when the density of the hole-clearing mud decreases. Pile quality risks are high, including obstructed lowering of the rebar cage, concrete segregation, and excessive sediment thickness. Additional loads have a significant impact, such as negative friction and abutment fill pressure, which can easily cause pile displacement or cracks. Targeted process optimization is required, such as increasing the casing burial depth, reinforcing the rebar cage along its entire length, closely linking process steps, and over-pouring concrete to compensate for settlement. In short, the high sensitivity and weak structural properties of soft soil significantly increase construction difficulty and quality risks, necessitating refined slurry management, enhanced support, and process control to ensure pile quality.

[0004] Among them, the announcement number CN118498888A is a large-diameter bored pile drilling device and construction method for soft soil. This technical solution can also perform hole expansion operations while drilling. The use of soil extrusion can not only achieve the purpose of hole expansion, but also compact the soil, improve the stability of the pile hole wall, and thus avoid landslides. After the drilling assembly of this technical solution rotates to the expected depth of the pile hole design, the outer and inner stop assemblies of multiple hole expansion mechanisms can expand the pile hole, achieving the effect of expanding the hole by squeezing the soil and compacting the soil. The hydraulic push rod 1 drives the outer baffle to expand outward, so that the outer baffle can squeeze and compact the soil on the hole wall. The hydraulic push rod 2 drives the inner baffle to expand outward, so that the inner baffle can squeeze and compact the soil on the hole wall between the two outer baffles. Therefore, although this technical solution can compact some soft soils to a certain extent to facilitate subsequent pouring, the compaction of this technical solution needs to be carried out simultaneously with the hole expansion work. That is to say, if hole expansion is not required, this technical solution cannot compact the construction land, and the usage scenario is too one-sided. Summary of the Invention

[0005] In order to solve the problem in the above-mentioned prior art that the compaction of soft soil needs to be carried out simultaneously with the expansion of the hole, that is, if expansion is not required, the technical solution cannot compact the construction land, and the usage scenario is too one-sided, the present invention provides a soft soil layer bored pile construction device, which compacts the soft soil by vertical hammering, and performs the compaction of the soil and the drilling simultaneously, which improves the drilling efficiency to a certain extent. The specific technical solution is: a soft soil layer bored pile construction device, comprising: a construction base, the lower wall of the construction base is equipped with a compaction and drilling structure, the upper wall of the construction base is equipped with two sets of shock-absorbing connection structures, the two sets of The upper wall of the shock-absorbing connection structure is installed with a lifting structure, and the lower wall of the lifting structure is installed with a tamping power structure. Two groups of eccentric vibration structures are respectively installed inside the two groups of shock-absorbing connection structures, and a transmission structure is provided between the two groups of eccentric vibration structures. The upper walls of the two groups of shock-absorbing connection structures are installed with a vibration power structure; the tamping and punching structure includes: a punching connection seat, a punching pipe, a tamping hammer and two pull hammer connection seats; the punching connection seat is installed on the lower wall of the construction base, the punching pipe is installed on the lower wall of the punching connection seat by bolts, the tamping hammer movably sleeve is mounted on the outside of the punching pipe, and the two pull hammer connection seats are respectively installed on the upper wall of the tamping hammer.

[0006] Preferably, the two groups of shock-absorbing connection structures include: a shock-absorbing connection box, four shock-absorbing slide rods, a number of shock-absorbing springs and a shock-absorbing hanging plate; the shock-absorbing connection box is installed on the upper wall of the construction base, the four shock-absorbing slide rods are movably installed inside the shock-absorbing connection box, a number of shock-absorbing springs are installed between the four shock-absorbing slide rods and the shock-absorbing connection box, the shock-absorbing hanging plate is installed on the upper wall of the four shock-absorbing slide rods, and the four shock-absorbing slide rods are fixed by nuts and shock-absorbing hanging plates.

[0007] Preferably, the lifting structure includes: two lifting hinges, a lifting beam and a lifting ring; the two lifting hinges are respectively installed on the upper wall of the shock-absorbing hanging plate, the lifting beam is installed between the two lifting hinges, and the lifting ring is installed on the upper wall of the lifting beam.

[0008] Preferably, the compaction power structure includes: a compaction winch, two scraping pulleys and two compaction power ropes; the compaction winch is installed on the lower wall of the lifting beam, the two scraping pulleys are respectively installed on the front wall and the rear wall of the construction base, one end of the two compaction power ropes is installed inside the compaction winch, and the other ends of the two compaction power ropes are respectively fixed on the upper wall of the pull hammer connecting seat.

[0009] Preferably, the four groups of eccentric vibration structures include: two eccentric vibration shafts, four eccentric vibrators, and two eccentric transmission gears; the two eccentric vibration shafts are respectively movably installed inside the shock-absorbing connecting box through bearings, the four eccentric vibrators are respectively fixedly installed on the outside of the two eccentric vibration shafts, and the two eccentric transmission gears are respectively installed on the outside of the eccentric vibration shafts, and the two eccentric transmission gears are engaged with each other.

[0010] Preferably, the two groups of transmission structures include: two transmission wheels and a transmission belt; the two transmission wheels are respectively installed on the inner side of the eccentric vibration shaft, and the transmission belt is installed on the outside of the two transmission wheels.

[0011] Preferably, the vibration power structure includes: a power hydraulic motor, a power shaft, two driving wheels, two driven wheels and two power belts; the power hydraulic motor is installed on the upper wall of the shock-absorbing connecting box, one end of the power shaft is movably installed on the upper wall of the shock-absorbing connecting box through a bearing, and the other end of the power shaft is installed on the driving end of the power hydraulic motor, the two driving wheels are respectively fixedly installed on the outside of the power shaft, the two driven wheels are respectively installed on the inner side of the eccentric vibration shaft, and the two power belts are movably installed on the outside of the driving wheel and the driven wheel.

[0012] Preferably, the transmission belt is a gear belt, and the two transmission wheels are gears that can mesh with the transmission belt.

[0013] Preferably, the power belt is a gear belt, the two driving wheels are gears that can mesh with the power belt, and the two driven wheels are gears that can mesh with the power belt.

[0014] Preferably, the lower wall surface of the perforated pipe is provided with a cutout.

[0015] The soft soil layer bored cast-in-place pile construction device of the present invention has the following beneficial effects compared with the prior art: the soft soil layer bored cast-in-place pile construction device drives the tamping hammer to lift by a winch, and then allows the tamping hammer to hammer the construction ground under the action of gravity. This method of compacting the ground, with downward pressure from top to bottom, makes the ground compact, and thus does not affect the aperture of the hole; and the device can compact the ground while drilling, and the center of the compacted ground coincides with the drilling pipe, thereby ensuring the accuracy of the compacted ground, and drilling and compacting the ground are carried out simultaneously, thereby improving the construction efficiency to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of the soft soil bored pile construction device provided by the present invention; Figure 2A schematic diagram of the overall structure of a first partial structure of the soft soil bored pile construction device provided by the present invention; Figure 3 This is an exploded schematic diagram of the first partial structure of the soft soil bored pile construction device provided by the present invention; Figure 4 A schematic diagram of the overall structure of the second partial structure of the soft soil bored pile construction device provided by the present invention; Figure 5 An exploded schematic diagram of the second partial structure of the soft soil bored pile construction device provided by the present invention; Figure 6 A schematic diagram of the overall structure of the third partial structure of the soft soil bored pile construction device provided by the present invention; Figure 7 An exploded schematic diagram of a third partial structure of the soft soil bored pile construction device provided by the present invention; in, Figures 1 to 7 The reference numerals and components of the soft soil bored pile construction device are: 1. Construction base; 2. Drilling connecting seat; 3. Drilling pipe; 4. Ramming hammer; 5. Pull hammer connecting seat; 6. Shock-absorbing connecting box; 7. Shock-absorbing slide rod; 8. Shock-absorbing spring; 9. Shock-absorbing hanging plate; 10. Lifting hinge; 11. Lifting beam; 12. Lifting ring; 13. Ramming winch; 14. Scraping pulley; 15. Ramming power rope; 16. Eccentric vibration shaft; 17. Eccentric vibrator; 18. Eccentric transmission gear; 19. Transmission wheel; 20. Transmission belt; 21. Power hydraulic motor; 22. Power shaft; 23. Driving wheel; 24. Driven wheel; 25. Power belt. DETAILED DESCRIPTION

[0017] The following is a combination of specific implementation cases and attached Figure 1-Figure 7 The present invention is further explained, but the present invention is not limited to these embodiments. The present invention provides a technical solution: a bored pile construction device for soft soil strata, comprising: a construction base 1, a tamping and punching structure installed on the lower wall of the construction base 1, two sets of shock-absorbing connection structures installed on the upper wall of the construction base 1, a hoisting structure installed on the upper wall of the two sets of shock-absorbing connection structures, a tamping power structure installed on the lower wall of the hoisting structure, two sets of eccentric vibration structures installed inside the two sets of shock-absorbing connection structures respectively, a transmission structure is provided between the two sets of eccentric vibration structures, and a vibration power structure is installed on the upper wall of the two sets of shock-absorbing connection structures; the tamping and punching structure comprises: a punching connection seat 2, a punching pipe 3, a tamping hammer 4 and two pull hammer connection seats 5; the punching connection seat 2 is installed on the lower wall of the construction base 1, the punching pipe 3 is installed on the lower wall of the punching connection seat 2 by bolts, the tamping hammer 4 is movably sleeved on the outside of the punching pipe 3, the two pull hammer connection seats 5 are respectively installed on the upper wall of the tamping hammer 4, and the lower wall of the punching pipe 3 is provided with a cut.

[0018] As a preferred solution, further, the two groups of shock-absorbing connection structures include: a shock-absorbing connection box 6, four shock-absorbing slide rods 7, a number of shock-absorbing springs 8 and a shock-absorbing hanging plate 9; the shock-absorbing connection box 6 is installed on the upper wall of the construction base 1, and the four shock-absorbing slide rods 7 are movably installed inside the shock-absorbing connection box 6, a number of shock-absorbing springs 8 are installed between the four shock-absorbing slide rods 7 and the shock-absorbing connection box 6, the shock-absorbing hanging plate 9 is installed on the upper wall of the four shock-absorbing slide rods 7, and the four shock-absorbing slide rods 7 are fixed by nuts and shock-absorbing hanging plates 9.

[0019] As a preferred solution, further, the lifting structure includes: two lifting hinges 10, a lifting beam 11 and a lifting ring 12; the two lifting hinges 10 are respectively installed on the upper wall surface of the shock-absorbing hanging plate 9, the lifting beam 11 is installed between the two lifting hinges 10, and the lifting ring 12 is installed on the upper wall surface of the lifting beam 11.

[0020] As a preferred solution, further, the compaction power structure includes: a compaction winch 13, two scraping pulleys 14 and two compaction power ropes 15; the compaction winch 13 is installed on the lower wall of the lifting beam 11, the two scraping pulleys 14 are respectively installed on the front wall and the rear wall of the construction base 1, one end of the two compaction power ropes 15 is installed inside the compaction winch 13, and the other ends of the two compaction power ropes 15 are respectively fixed on the upper wall of the pull hammer connecting seat 5.

[0021] As a preferred solution, further, the four groups of eccentric vibration structures include: two eccentric vibration shafts 16, four eccentric vibrators 17, and two eccentric transmission gears 18; the two eccentric vibration shafts 16 are respectively installed in the interior of the shock-absorbing connecting box 6 through bearings, the four eccentric vibrators 17 are respectively fixedly installed on the outside of the two eccentric vibration shafts 16, and the two eccentric transmission gears 18 are respectively installed on the outside of the eccentric vibration shafts 16, and the two eccentric transmission gears 18 are engaged with each other.

[0022] As a preferred solution, further, the two sets of transmission structures include: two transmission wheels 19 and a transmission belt 20; the two transmission wheels 19 are respectively installed on the inner side of the eccentric vibration shaft 16, and the transmission belt 20 is installed on the outside of the two transmission wheels 19. The transmission belt 20 is a gear belt, and the two transmission wheels 19 are gears that can mesh with the transmission belt 20.

[0023] As a preferred embodiment, further, the vibration power structure includes: a power hydraulic motor 21, a power shaft 22, two driving wheels 23, two driven wheels 24 and a power belt 25; the power hydraulic motor 21 is installed on the upper wall of the shock-absorbing connecting box 6, one end of the power shaft 22 is movably installed on the upper wall of the shock-absorbing connecting box 6 through a bearing, and the other end of the power shaft 22 is installed on the driving end of the power hydraulic motor 21, the two driving wheels 23 are respectively fixedly installed on the outside of the power shaft 22, and the two driven wheels 24 are respectively installed on the inner side of the eccentric vibration shaft 16, and the two power belts 25 are movably installed on the outside of the driving wheel 23 and the driven wheel 24, and the power belt 25 is a gear belt, the two driving wheels 23 are gears that can engage with the power belt 25, and the two driven wheels 24 are gears that can engage with the power belt 25.

[0024] Working Principle: Before using this device, some preparation is required. The operator needs a lifting device such as a crane. Then, the operator connects an external AC power supply to the device to provide energy for the electrical equipment in the device. Then, the operator connects an external hydraulic power supply to the device to provide power for the power hydraulic motor 21. The lifting device is then lifted by the lifting ring 12, and the perforated pipe 3 is aligned with the designated position.

[0025] Then the operator starts the power hydraulic motor 21, and the power hydraulic motor 21 begins to rotate, driving the power shaft 22 to rotate, and at the same time driving the two driving wheels 23 located outside the power shaft 22 to rotate, and driving the two driven wheels 24 to rotate through the power belt 25. It should be noted that the power belt 25 is a gear belt, and the two driving wheels 23 and the two driven wheels 24 are gears that can mesh with the power belt 25, so the two driven wheels 24 rotate synchronously.

[0026] The driven wheel 24 rotates, driving the eccentric vibration shaft 16 connected thereto to rotate, and then driving the eccentric transmission gear 18 installed at the outer end of the eccentric vibration shaft 16 to rotate. The two eccentric transmission gears 18 rotate in opposite directions and at the same speed through the meshing between the gears. The other eccentric transmission gear 18 drives the other eccentric vibration shaft 16 to rotate. The rotation of the eccentric vibration shaft 16 drives the transmission wheel 19 installed on its inner side to rotate. Then, driven by the transmission belt 20, the other transmission wheel 19 rotates in the same direction and at the same speed as the previous transmission wheel 19. Another transmission wheel 19 drives the eccentric vibration shaft 16 connected thereto to rotate, and then through the meshing of a group of eccentric transmission gears 18, it drives the last eccentric vibration shaft 16 to rotate. Since the two eccentric vibration shafts 16 on the same horizontal plane rotate at the same speed and in opposite directions, and the eccentric vibrator 17 installed outside them also has an angle of 180 degrees on the horizontal plane, their horizontal vibrations will cancel each other out, leaving vibrations only in the vertical direction.

[0027] The transmission belt 20 is a gear belt, and the two transmission wheels 19 are gears that can mesh with the transmission belt 20. Therefore, the two transmission wheels 19 rotate synchronously, so all the eccentric vibration shafts 16 can rotate synchronously, that is, the two eccentric vibrators 17 outside each eccentric vibration shaft 16 are driven to rotate. Since the center of gravity of the eccentric vibrator 17 and the axis of the eccentric vibration shaft 16 do not coincide with the eccentric vibrator 17, the eccentric vibrator 17 drives the eccentric vibration shaft 16 and the shock-absorbing connecting box 6 outside it to vibrate. The shock-absorbing connecting box 6 moves up and down outside the four shock-absorbing slide bars 7, and several shock-absorbing springs 8 can reset the shock-absorbing connecting box 6 to its original position outside the four shock-absorbing slide bars 7. Therefore, the vibration of the shock-absorbing connecting box 6 will not be transmitted to the four shock-absorbing slide bars 7.

[0028] The vibration of the shock-absorbing connecting box 6 drives the construction base 1 to vibrate synchronously, and then drives the punching connecting seat 2 and the punching pipe 3 to vibrate. The lower wall of the vibrating punching pipe 3 is provided with a cutout, which enables the vibrating punching pipe 3 to continuously enter the soil of the construction site to perform drilling.

[0029] At the same time, the compacting winch 13 starts to rotate, driving the two compacting power ropes 15 to be reeled into the inside of the compacting winch 13. The two compacting power ropes 15 are tightened, and the compacting hammer 4 rises outside the punching pipe 3 under the pull of the two pull hammer connecting seats 5. When the compacting hammer 4 rises to the top, the compacting winch 13 is in a loosened state, and the compacting hammer 4 falls freely under the action of gravity. The compacting hammer 4 slides outside the punching pipe 3 until the compacting hammer 4 hits the construction ground, which can compact the soft ground and ensure smooth drilling and hole formation of the punching pipe 3.

[0030] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise expressly defined, the orientations or positional relationships indicated by the terms "upper" and "lower" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connect," "install," and "fix" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A construction device for bored piles in soft soil, comprising: The construction base (1) is characterized in that a tamping and punching structure is installed on the lower wall of the construction base (1), two groups of shock-absorbing connection structures are installed on the upper wall of the construction base (1), a hoisting structure is installed on the upper wall of the two groups of shock-absorbing connection structures, a tamping power structure is installed on the lower wall of the hoisting structure, two groups of eccentric vibration structures are installed inside the two groups of shock-absorbing connection structures, a transmission structure is provided between the two groups of eccentric vibration structures, and a vibration power structure is installed on the upper wall of the two groups of shock-absorbing connection structures; the tamping and punching structure comprises: a punching connection seat (2), a punching pipe (3), a tamping hammer (4) and two pull hammer connection seats (5); the punching connection seat (2) is installed on the lower wall of the construction base (1), the punching pipe (3) is installed on the lower wall of the punching connection seat (2) by bolts, the tamping hammer (4) is movably sleeved on the outside of the punching pipe (3), and the two pull hammer connection seats (5) are respectively installed on the upper wall of the tamping hammer (4).

2. The soft soil bored pile construction device according to claim 1, characterized in that: The two groups of shock-absorbing connection structures include: a shock-absorbing connection box (6), four shock-absorbing slide bars (7), a plurality of shock-absorbing springs (8) and a shock-absorbing hanging plate (9); the shock-absorbing connection box (6) is installed on the upper wall of the construction base (1), the four shock-absorbing slide bars (7) are movably installed inside the shock-absorbing connection box (6), the plurality of shock-absorbing springs (8) are installed between the four shock-absorbing slide bars (7) and the shock-absorbing connection box (6), the shock-absorbing hanging plate (9) is installed on the upper wall of the four shock-absorbing slide bars (7), and the four shock-absorbing slide bars (7) are fixed by nuts and the shock-absorbing hanging plate (9).

3. The soft soil bored pile construction device according to claim 1, characterized in that: The hoisting structure comprises: two hoisting hinges (10), a hoisting beam (11) and a hoisting ring (12); the two hoisting hinges (10) are respectively installed on the upper wall surface of the shock-absorbing hanging plate (9), the hoisting beam (11) is installed between the two hoisting hinges (10), and the hoisting ring (12) is installed on the upper wall surface of the hoisting beam (11).

4. The soft soil bored pile construction device according to claim 1, characterized in that: The compaction power structure comprises: a compaction winch (13), two scraping pulleys (14) and two compaction power ropes (15); the compaction winch (13) is installed on the lower wall of the hoisting beam (11), the two scraping pulleys (14) are respectively installed on the front wall and the rear wall of the construction base (1), one end of the two compaction power ropes (15) is installed inside the compaction winch (13), and the other ends of the two compaction power ropes (15) are respectively fixedly installed on the upper wall of the pull hammer connecting seat (5).

5. The soft soil bored pile construction device according to claim 1, characterized in that: The four groups of eccentric vibration structures include: two eccentric vibration shafts (16), four eccentric vibrators (17), and two eccentric transmission gears (18); the two eccentric vibration shafts (16) are respectively movably mounted inside the shock-absorbing connection box (6) through bearings, the four eccentric vibrators (17) are respectively fixedly mounted outside the two eccentric vibration shafts (16), and the two eccentric transmission gears (18) are respectively mounted outside the eccentric vibration shafts (16), and the two eccentric transmission gears (18) are meshed with each other.

6. The soft soil bored pile construction device according to claim 1, characterized in that: The two sets of transmission structures include: two transmission wheels (19) and a transmission belt (20); the two transmission wheels (19) are respectively installed on the inner side of the eccentric vibration shaft (16), and the transmission belt (20) is installed on the outside of the two transmission wheels (19).

7. The soft soil bored pile construction device according to claim 1, characterized in that: The vibration power structure comprises: a power hydraulic motor (21), a power shaft (22), two driving wheels (23), two driven wheels (24) and two power belts (25); the power hydraulic motor (21) is mounted on the upper wall of the shock-absorbing connecting box (6), one end of the power shaft (22) is movably mounted on the upper wall of the shock-absorbing connecting box (6) through a bearing, the other end of the power shaft (22) is mounted on the driving end of the power hydraulic motor (21), the two driving wheels (23) are respectively fixedly mounted on the outside of the power shaft (22), the two driven wheels (24) are respectively mounted on the inside of the eccentric vibration shaft (16), and the two power belts (25) are movably mounted on the outside of the driving wheel (23) and the driven wheel (24).

8. The soft soil bored pile construction device according to claim 6, characterized in that: The transmission belt (20) is a gear belt, and the two transmission wheels (19) are gears that can mesh with the transmission belt (20).

9. The soft soil bored pile construction device according to claim 7, characterized in that: The power belt (25) is a gear belt, the two driving wheels (23) are gears that can mesh with the power belt (25), and the two driven wheels (24) are gears that can mesh with the power belt (25).

10. The soft soil bored pile construction device according to claim 1, characterized in that: The lower wall surface of the perforated pipe (3) is provided with a cutout.

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