A construction device for cast-in-place pile in soft soil layer

Abstract

This invention provides a drilling and grouting pile construction device for soft soil strata, belonging to the field of drilling and grouting pile construction technology. It includes: a construction base; a compaction and drilling structure installed on the lower wall of the construction base; two sets of vibration-damping connection structures installed on the upper wall of the construction base; a hoisting structure installed on the upper wall of the two sets of vibration-damping connection structures; and a compaction power structure installed on the lower wall of the hoisting structure. This device uses a winch to drive a compaction hammer, which is then used to hammer the ground under gravity. This method of compacting the soil, with downward pressure from top to bottom, makes the soil compacted, thus not affecting the diameter of the drilled hole. Furthermore, this device can compact the soil simultaneously with drilling, ensuring the center of the compacted soil coincides with the drilling pipe, guaranteeing the accuracy of the compaction. Since drilling and compaction are performed concurrently, it improves construction efficiency to a certain extent.

Description

Technical Field

[0001] This invention belongs to the field of bored pile construction technology, specifically relating to a bored pile construction device for soft soil strata. Background Technology

[0002] Drilled pile construction is a process in which pile holes are formed in the foundation on-site through mechanical drilling, steel pipe extrusion, or manual excavation. A reinforcing cage is then placed inside the hole, and concrete is poured in to form the pile foundation. Its core process includes site leveling, surveying and positioning, casing installation, mud preparation, mechanical drilling, hole cleaning, reinforcing cage hoisting and positioning, and continuous underwater concrete pouring. This method is suitable for various geological conditions and has advantages such as low construction vibration, low noise, large pile diameter, and high bearing capacity. However, the construction quality is easily affected by factors such as mud management, the continuity of concrete pouring, and the effectiveness of hole cleaning. Strict control of each stage is necessary to ensure the integrity and bearing capacity of the pile.

[0003] The impact of soft soil (such as silt and silty clay) on bored pile construction is mainly manifested in the following ways: poor borehole stability, prone to necking or collapse, especially when the density of the drilling mud decreases during cleaning, requiring the use of high-density mud and strict control of drilling speed to maintain the wall protection effect; high risk to pile quality, including obstruction of steel cage placement, concrete segregation, and excessive sediment thickness; significant impact of additional loads, such as negative skin friction and abutment backfill pressure, which can easily lead to pile displacement or cracking; and the need for targeted optimization of processes, such as increasing the depth of the casing, full-length reinforcement of the steel cage, tight connection of processes, and over-pouring of concrete to compensate for settlement. In summary, the high sensitivity and weak structure of soft soil significantly increase the difficulty of construction and quality risks, requiring meticulous mud management, enhanced support, and process control to ensure the quality of pile formation.

[0004] Among them, the announcement number CN118498888A discloses a drilling device and construction method for large-diameter cast-in-place piles in soft soil strata. This technical solution can perform hole enlargement operations simultaneously with drilling. By squeezing the soil, it can achieve the purpose of hole enlargement and compaction, thereby improving the stability of the pile hole wall and preventing collapse. After the drilling component of this technical solution rotates to the expected depth of the designed pile hole, the already formed pile hole can be expanded by the outer and inner baffle components of multiple hole enlargement mechanisms, achieving the effect of hole enlargement and soil compaction through soil squeezing. Specifically, hydraulic push rod one drives the outer baffle to expand outward, achieving the effect of the outer baffle squeezing and compacting the soil on the hole wall; hydraulic push rod two drives the inner baffle to expand outward, achieving the effect of the inner baffle squeezing and compacting the soil on the hole wall between the two outer baffles. Therefore, although this technical solution can compact some soft soil to a certain extent to facilitate subsequent grouting, the compaction of this technical solution needs to be carried out simultaneously with the hole enlargement work. In other words, if hole enlargement is not required, this technical solution cannot compact the construction land, making its application scenario too limited. Summary of the Invention

[0005] To address the issue in existing technologies where compaction of soft soil requires simultaneous drilling, meaning the technology cannot compact the soil if drilling is not needed, thus limiting its applicability, this invention provides a drilling and grouting pile construction device for soft soil strata. This device uses vertical hammering to compact soft soil and performs compaction and drilling simultaneously, improving drilling efficiency to some extent. The specific technical solution is as follows: A drilling and grouting pile construction device for soft soil strata includes: a construction base; a compaction and drilling structure installed on the lower wall of the construction base; and two sets of vibration-damping connection structures installed on the upper wall of the construction base. A hoisting structure is installed on the upper wall of the shock-absorbing connection structure, and a compaction power structure is installed on the lower wall of the hoisting structure. Two sets of eccentric vibration structures are installed inside the two sets of shock-absorbing connection structures, and a transmission structure is provided between the two sets of eccentric vibration structures. A vibration power structure is installed on the upper wall of the two sets of shock-absorbing connection structures. The compaction and drilling structure includes: a drilling connection seat, a drilling pipe, a compaction hammer, and two pull hammer connection seats. The drilling connection seat is installed on the lower wall of the construction base, the drilling pipe is installed on the lower wall of the drilling connection seat by bolts, the compaction hammer is movably fitted on the outside of the drilling pipe, and the two pull hammer connection seats are respectively installed on the upper wall of the compaction hammer.

[0006] Preferably, the two sets of shock-absorbing connection structures include: a shock-absorbing connection box, four shock-absorbing slide rods, several shock-absorbing springs, and a shock-absorbing mounting plate; the shock-absorbing connection box is installed on the upper wall of the construction base, the four shock-absorbing slide rods are respectively movably installed inside the shock-absorbing connection box, the several shock-absorbing springs are installed between the four shock-absorbing slide rods and the shock-absorbing connection box, the shock-absorbing mounting 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 the shock-absorbing mounting plate.

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

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

[0009] Preferably, the four sets of eccentric vibration structures include: two eccentric vibration shafts, four eccentric oscillators, and two eccentric transmission gears; the two eccentric vibration shafts are respectively movably mounted inside the shock-absorbing connecting box via bearings, the four eccentric oscillators are respectively fixedly mounted outside the two eccentric vibration shafts, and the two eccentric transmission gears are respectively mounted outside the eccentric vibration shafts, and the two eccentric transmission gears mesh with each other.

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

[0011] Preferably, the vibration power structure includes: a hydraulic motor, a power shaft, two drive wheels, two driven wheels, and two power belts; the hydraulic motor is mounted on the upper wall of the vibration damping connection box, one end of the power shaft is movably mounted on the upper wall of the vibration damping connection box via a bearing, the other end of the power shaft is mounted on the drive end of the hydraulic motor, the two drive wheels are respectively fixedly mounted on the outside of the power shaft, the two driven wheels are respectively mounted on the inside of the eccentric vibration shaft, and the two power belts are movably mounted on the outside of the drive wheels and driven wheels.

[0012] Preferably, the transmission belt is a gear belt, and the two transmission pulleys are gears capable of meshing with the transmission belt.

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

[0014] Preferably, the lower wall surface of the perforated pipe has a cut.

[0015] The present invention provides a drilling and grouting pile construction device for soft soil strata. Compared with the prior art, the device has the following advantages: The device uses a winch to lift a tamping hammer, which then strikes the ground under gravity. This method of compacting the soil, with downward pressure from top to bottom, makes the soil compacted, thus not affecting the diameter of the drilled hole. Furthermore, the device can compact the soil simultaneously with drilling, ensuring the accuracy of the compaction by aligning the center of the compacted soil with the drilling pipe. The simultaneous drilling and compaction also improves construction efficiency to a certain extent. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the drilling and grouting pile construction device for soft soil strata provided by the present invention;

[0017] Figure 2A schematic diagram of the first partial structure of the drilling and grouting pile construction device for soft soil strata provided by the present invention;

[0018] Figure 3 An exploded view of a first partial structure of the drilling and grouting pile construction device for soft soil strata provided by the present invention.

[0019] Figure 4 A schematic diagram of the second partial structure of the drilling and grouting pile construction device for soft soil strata provided by the present invention;

[0020] Figure 5 An exploded view of the second partial structure of the drilling and grouting pile construction device for soft soil strata provided by the present invention;

[0021] Figure 6 A schematic diagram of the third partial structure of the drilling and grouting pile construction device for soft soil strata provided by the present invention;

[0022] Figure 7 An exploded view of the third partial structure of the drilling and grouting pile construction device for soft soil strata provided by the present invention;

[0023] in, Figures 1 to 7 The attached diagram shows the following components for the construction device of bored piles in soft soil strata: 1. Construction base; 2. Drilling connection seat; 3. Drilling pipe; 4. Compactor hammer; 5. Pull hammer connection seat; 6. Vibration damping connection box; 7. Vibration damping slide bar; 8. Vibration damping spring; 9. Vibration damping hanging plate; 10. Lifting hinge; 11. Lifting beam; 12. Lifting ring; 13. Compactor winch; 14. Scraping pulley; 15. Compactor 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 Implementation

[0024] The following are specific implementation cases and appendices. Figures 1-7The present invention will be further described, but the present invention is not limited to these embodiments. The present invention provides a technical solution: a drilling and grouting pile construction device for soft soil strata, comprising: a construction base 1, a tamping and drilling structure installed on the lower wall of the construction base 1, two sets of vibration isolation 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 vibration isolation 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 vibration isolation connection structures respectively, a transmission structure provided between the two sets of eccentric vibration structures, and a vibration power structure installed on the upper wall of the two sets of vibration isolation connection structures; the tamping and drilling structure includes: a drilling connection seat 2, a drilling pipe 3, a tamping hammer 4, and two pull hammer connection seats 5; the drilling connection seat 2 is installed on the lower wall of the construction base 1, the drilling pipe 3 is installed on the lower wall of the drilling connection seat 2 by bolts, the tamping hammer 4 is movably fitted on the outside of the drilling 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 drilling pipe 3 is provided with a cut.

[0025] As a preferred option, the two sets of shock-absorbing connection structures further include: a shock-absorbing connection box 6, four shock-absorbing slide rods 7, several 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 rods 7 are respectively movably installed inside the shock-absorbing connection box 6, the several shock-absorbing springs 8 are installed between the four shock-absorbing slide rods 7 and the shock-absorbing connection box 6, and 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 the shock-absorbing hanging plate 9.

[0026] As a preferred embodiment, the hoisting structure further includes: 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 of the shock-absorbing 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 of the hoisting beam 11.

[0027] As a preferred option, the compaction power structure further includes: a compaction winch 13, two anti-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 anti-scraping pulleys 14 are respectively installed on the front and rear walls of the construction base 1, one end of the two compaction power ropes 15 is installed inside the compaction winch 13, and the other end of the two compaction power ropes 15 is respectively fixedly installed on the upper wall of the pull hammer connecting seat 5.

[0028] As a preferred embodiment, the four sets of eccentric vibration structures further include: two eccentric vibration shafts 16, four eccentric oscillators 17, and two eccentric transmission gears 18; the two eccentric vibration shafts 16 are respectively movably mounted inside the shock-absorbing connecting box 6 via bearings, the four eccentric oscillators 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 mesh with each other.

[0029] As a preferred embodiment, the two transmission structures further 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.

[0030] As a preferred embodiment, the vibration power structure further includes: a hydraulic motor 21, a power shaft 22, two drive wheels 23, two driven wheels 24, and a power belt 25; the hydraulic motor 21 is mounted on the upper wall of the vibration damping connection box 6, one end of the power shaft 22 is movably mounted on the upper wall of the vibration damping connection box 6 via a bearing, and the other end of the power shaft 22 is mounted on the drive end of the hydraulic motor 21, the two drive 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 drive wheels 23 and the driven wheels 24. The power belts 25 are gear belts, the two drive wheels 23 are gears that can mesh with the power belts 25, and the two driven wheels 24 are gears that can mesh with the power belts 25.

[0031] Working Principle: Before using this device, some preparations are required. The operator needs a lifting device such as a crane. Then, the operator connects an external AC power source to the device to provide power to the electrical equipment. Next, an external hydraulic power source is connected to the device to provide power to the hydraulic motor 21. The lifting device is then lifted using the lifting ring 12, while simultaneously aligning the perforated pipe 3 with the designated position.

[0032] Next, the operator starts the power hydraulic motor 21, which begins to rotate, driving the power shaft 22 to rotate. Simultaneously, it drives the two drive wheels 23 located outside the power shaft 22 to rotate, and through the power belt 25, it drives the two driven wheels 24 to rotate. It should be noted that the power belt 25 is a gear belt, and the two drive wheels 23 and the two driven wheels 24 are all gears that can mesh with the power belt 25. Therefore, the two driven wheels 24 rotate synchronously.

[0033] The driven wheel 24 rotates, driving the eccentric vibration shaft 16 connected to it to rotate. This, in turn, drives the eccentric transmission gear 18 mounted on the outer end of the eccentric vibration shaft 16 to rotate. The two eccentric transmission gears 18 rotate in opposite directions but at the same speed through gear meshing. Another eccentric transmission gear 18 drives another eccentric vibration shaft 16 to rotate. The rotation of this eccentric vibration shaft 16 drives the transmission wheel 19 mounted on its inner side to rotate. Driven by the transmission belt 20, this transmission wheel 19 rotates in the same direction and at the same speed as the first transmission wheel 19. The other transmission wheel 19 drives the eccentric vibration shaft 16 connected to it to rotate, and through the meshing of another set of eccentric transmission gears 18, 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 but in opposite directions, and the eccentric oscillator 17 installed outside them is also at an angle of 180 degrees on the horizontal plane, their horizontal vibrations will cancel each other out, so that the vibrations only exist in the vertical direction.

[0034] The transmission belt 20 is a gear belt, and the two transmission pulleys 19 are gears that can mesh with the transmission belt 20. Therefore, the two transmission pulleys 19 rotate synchronously, and all the eccentric vibration shafts 16 can rotate synchronously. This drives the two eccentric oscillators 17 outside each eccentric vibration shaft 16 to rotate. Since the center of gravity of the eccentric oscillator 17 does not coincide with the axis of the eccentric vibration shaft 16, the eccentric oscillator 17 drives the eccentric vibration shaft 16 and its external shock-absorbing connecting box 6 to vibrate. The shock-absorbing connecting box 6 moves up and down outside the four shock-absorbing slide rods 7, and several shock-absorbing springs 8 can return the shock-absorbing connecting box 6 to its original position outside the four shock-absorbing slide rods 7. Therefore, the vibration of the shock-absorbing connecting box 6 will not be transmitted to the four shock-absorbing slide rods 7.

[0035] The vibration of the shock-absorbing connection box 6 causes the construction base 1 to vibrate synchronously, which in turn causes the drilling connection seat 2 and the drilling pipe 3 to vibrate. The lower wall of the vibrating drilling pipe 3 is provided with a cut, which allows the vibrating drilling pipe 3 to continuously enter the soil of the construction site for drilling.

[0036] At the same time, the tamping winch 13 starts to rotate, driving the two tamping power ropes 15 to be wound into the interior of the tamping winch 13. The two tamping power ropes 15 are tightened, and the tamping hammer 4 rises outside the drilling pipe 3 under the pull of the two pull hammer connecting seats 5. When the tamping hammer 4 rises to the top, the tamping winch 13 is in a released state, and the tamping hammer 4 falls freely under the action of gravity. The tamping hammer 4 slides outside the drilling pipe 3 until the tamping hammer 4 hits the construction ground, which can compact the soft ground and ensure the smooth drilling and hole formation of the drilling pipe 3.

[0037] In the description of this invention, the term "a plurality of" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. 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 meaning of the above terms in this invention can be understood according to the specific circumstances.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A drilling and grouting pile construction device for soft soil strata, comprising: The construction base (1) is characterized in that a tamping and drilling structure is installed on the lower wall of the construction base (1), two sets 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 sets of shock-absorbing connection structures, a tamping power structure is installed on the lower wall of the hoisting structure, two sets of eccentric vibration structures are 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 drilling structure includes: a drilling connection seat (2), a drilling pipe (3), a tamping hammer (4), and two pull hammer connection seats. (5); The drilling connector (2) is installed on the lower wall of the construction base (1), the drilling pipe (3) is installed on the lower wall of the drilling connector (2) by bolts, the tamping hammer (4) is movably fitted on the outside of the drilling pipe (3), and the two pull hammer connectors (5) are respectively installed on the upper wall of the tamping hammer (4); the two sets of shock-absorbing connection structures include: shock-absorbing connection box (6), four shock-absorbing slide rods (7), several shock-absorbing springs (8) and 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 rods (7) are respectively movably installed inside the shock-absorbing connection box (6), and several The shock-absorbing spring (8) is installed between the four shock-absorbing slide rods (7) and the shock-absorbing connecting 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 the shock-absorbing hanging plate (9). The compaction power structure includes: a compaction winch (13), two anti-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 anti-scraping pulleys (14) are respectively installed on the front and rear walls of the construction base (1). One end of the two compaction power ropes (15) is installed on the compaction winch. Inside (13), the other ends of the two tamping power ropes (15) are respectively fixedly installed on the upper wall of the pull hammer connecting seat (5); the four sets 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 installed inside the shock absorber connecting box (6) through bearings, the four eccentric vibrators (17) are respectively fixedly installed outside the two eccentric vibration shafts (16), and the two eccentric transmission gears (18) are respectively installed outside the eccentric vibration shafts (16), and the two eccentric transmission gears (18) mesh with each other.

2. The drilling and grouting pile construction device for soft soil strata according to claim 1, characterized in that, The hoisting structure includes: 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 of the shock-absorbing 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 of the hoisting beam (11).

3. The drilling and grouting pile construction device for soft soil strata 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).

4. The drilling and grouting pile construction device for soft soil strata according to claim 1, characterized in that, The vibration power structure includes: a power hydraulic motor (21), a power shaft (22), two drive wheels (23), two driven wheels (24), and two power belts (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, the other end of the power shaft (22) is installed on the drive end of the power hydraulic motor (21), the two drive wheels (23) are respectively fixedly installed on the outside of the power shaft (22), the two driven wheels (24) are respectively installed on the inside of the eccentric vibration shaft (16), and the two power belts (25) are movably installed on the outside of the drive wheels (23) and the driven wheels (24).

5. The drilling and grouting pile construction device for soft soil strata according to claim 3, characterized in that, The transmission belt (20) is a gear belt, and the two transmission pulleys (19) are gears that can mesh with the transmission belt (20).

6. The drilling and grouting pile construction device for soft soil strata according to claim 4, characterized in that, The power belt (25) is a gear belt, the two driving pulleys (23) are gears that can mesh with the power belt (25), and the two driven pulleys (24) are gears that can mesh with the power belt (25).

7. The drilling and grouting pile construction device for soft soil strata according to claim 1, characterized in that, The lower wall of the perforated pipe (3) has a cut.

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