Piling equipment for cast-in-situ bored piles in multi-boulder

Abstract

The utility model discloses pile driving equipment for cast-in-situ bored piles in a multi-boulder area, which comprises a main machine body, a rack is arranged on the main machine body, a drill rod, a lifting mechanism for driving the drill rod to lift and a rotating mechanism for driving the drill rod to rotate are arranged on the rack, and a bored pile is arranged at the bottom end of the drill rod. A hammering hole and a plurality of vibration rod holes surrounding the hammering hole are formed in the bottom of the drilled pile, a gravity block corresponding to the hammering hole and vibration rods corresponding to the vibration rod holes are arranged in the drilled pile, and a gravity hammer driven by a hammering oil cylinder is arranged above the gravity block. The upper end of the vibrating rod is fixedly connected with a vibrating chamber vibrating up and down, and the vibrating chamber is connected with a lifting oil cylinder through a mounting base. The utility model has the characteristics that the rock crushing degree is improved, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a pile driving device, in particular to a bored pile driving device for areas with many isolated rocks. Background Art

[0002] A boulder is an isolated rock or boulder formed during geological formation or action, isolated and existing independently by the surrounding environment or geological strata. Areas with numerous boulder layers are characterized by a lack of rock stability. Because boulders have very low compressibility, significantly different from the compressibility of the surrounding soil, foundation engineering in these areas often faces significant difficulties, which can easily lead to uneven foundations and settlement. For example: 1. When two adjacent columns contain independent foundations under one base with a boulder in the soil layer and the other without, the difference in settlement between the two foundations is excessive, exceeding the allowable value in the code. 2. When part of an independent foundation under the same column rests directly on the boulder and the other part rests on the soil, different parts of the foundation settle differently and the foundation rotates. Therefore, when piling in boulder-ridden areas, it is necessary to first crush the rock layer before constructing the cast-in-place piles to avoid subsequent settlement problems.

[0003] Existing bored pile driving equipment generally uses a power head to drive the drill bit of the drill rod to drill a hole underground. When the drill bit contacts different matrices such as soil and rock, it adopts the same processing method. It is relatively easy to break the soil, but it is more difficult to break the underground rock. The degree of crushing is weak, the crushing time is long, and the work efficiency is low. Utility Model Content

[0004] The purpose of the utility model is to provide a bored pile driving device for areas with many isolated rocks. The utility model has the characteristics of improving the degree of rock crushing and improving construction efficiency.

[0005] The technical solution of the utility model is as follows: the bored pile driving equipment for areas with many isolated rocks comprises a main body, a frame is provided on the main body, a drill rod, a lifting mechanism for driving the drill rod to lift and lower, and a rotating mechanism for driving the drill rod to rotate are provided on the frame, a bored pile is provided at the bottom end of the drill rod, a hammering hole and a plurality of vibrating rod holes surrounding the hammering hole are provided at the bottom of the bored pile, a gravity block corresponding to the hammering hole and a vibrating rod corresponding to the vibrating rod hole are provided inside the bored pile, a gravity hammer driven by a hammering cylinder is provided above the gravity block, a vibration chamber that vibrates up and down is fixedly connected to the upper end of the vibrating rod, and the vibration chamber is connected to the lifting cylinder via a mounting seat.

[0006] In the aforementioned bored pile driving equipment for areas with many solitary rocks, a guide rod is provided inside the bored pile, a limit block is provided at the bottom of the guide rod, the gravity block moves up and down along the guide rod through the guide sleeve, and a buffer spring is provided outside the guide rod between the guide sleeve and the limit block.

[0007] In the aforementioned bored pile driving equipment for boulder-prone areas, a pair of parallel drive shafts are provided inside the vibration chamber, and both drive shafts are provided with eccentric wheels. The eccentric directions of the eccentric wheels on the two drive shafts are relatively distributed, and one end of the two drive shafts is respectively provided with mutually meshing transmission gears, and the other end of one of the drive shafts is provided with a transmission wheel. A drive motor is also provided inside the vibration chamber, and a driving wheel is provided on the output shaft of the drive motor. The driving wheel and the transmission wheel are driven by a transmission belt.

[0008] In the aforementioned bored pile driving equipment for boulder-prone areas, the vibration chamber is provided with a long screw connected to the mounting seat, and a shock-absorbing spring is sleeved on the long screw. One end of the shock-absorbing spring is connected to the vibration chamber, and the other end of the shock-absorbing spring is connected to the mounting seat.

[0009] In the aforementioned bored pile driving equipment for areas with many solitary rocks, a plurality of impact blocks distributed in an annular manner are provided at the bottom of the gravity block; and a plurality of cutting gears distributed in an annular manner are provided at the bottom of the bored pile.

[0010] In the aforementioned bored pile driving equipment for areas with many boulders, the cutting gears are respectively located at the inner edge, middle and outer edge of the bored pile. The cutting direction of the cutting gear located at the inner edge of the bored pile is inward, the cutting direction of the cutting gear located in the middle of the bored pile is downward, and the cutting direction of the cutting gear located at the outer edge of the bored pile is outward.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The lifting mechanism and the rotating mechanism provided in the utility model drive the bored pile to rotate to break the soil and drill holes. When encountering isolated rock landforms, the gravity hammer is first driven by the hammering oil cylinder to hammer the gravity block downward, so that the gravity block extends out of the bored pile to repeatedly hit the rock first, and the large rock is broken into small pieces of rock; after the gravity block breaks the large isolated rock, the lifting oil cylinder drives the vibration rod to extend out of the vibration rod hole, and at the same time the rotating mechanism rotates the bored pile to adjust the position of the vibration rod so that the vibration rod corresponds to the small rock. The vibration rod is driven by the vibration chamber to vibrate up and down at a high frequency, and the small rock is broken into fine stones, so that the goal of quickly breaking the rock layer is achieved, the construction period is greatly shortened, the construction efficiency is improved, the complex geological conditions in areas with many isolated rocks are adapted, and the stability of the construction is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of bored piles;

[0015] Figure 3 It is a schematic diagram of the bottom structure of bored piles;

[0016] Figure 4 It is a structural diagram of the eccentric wheel.

[0017] Figure 5 It is a structural diagram of the vibration chamber.

[0018] The marks in the accompanying drawings are: 1. main body; 2. frame; 21. drill rod; 3. bored pile; 31. hammer hole; 32. vibration rod hole; 33. gravity block; 331. impact block; 34. gravity hammer; 35. hammer cylinder; 36. vibration rod; 37. vibration chamber; 371. mounting seat; 38. lifting cylinder; 381. guide rod; 382. limit block; 383. guide sleeve; 384. buffer spring; 41. drive shaft; 42. eccentric wheel; 43. transmission gear; 44. transmission wheel; 45. driving wheel; 46. transmission belt; 47. long screw; 48. shock-absorbing spring; 51. cutting gear. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments, but they are not intended to limit the present invention.

[0020] Example:

[0021] like Figure 1-Figure 5 As shown, the bored pile driving equipment for boulder-prone areas includes a main body 1, a frame 2 disposed on the main body 1, a drill rod 21, a lifting mechanism for driving the drill rod 21 to rise and fall, and a rotating mechanism for driving the drill rod 21 to rotate. The above mechanisms are all prior art and will not be described in detail here. The bottom end of the drill rod 21 is provided with a bored pile 3, the bottom of the bored pile 3 is provided with a hammering hole 31 and a plurality of vibrating rod holes 32 surrounding the hammering hole 31, the interior of the bored pile 3 is provided with a gravity block 33 corresponding to the hammering hole 31 and a vibrating rod 36 corresponding to the vibrating rod holes 32, a gravity hammer 34 driven by a hammering cylinder 35 is disposed above the gravity block 33, and the upper end of the vibrating rod 36 is fixedly connected to a vibration chamber 37 that vibrates up and down, and the vibration chamber 37 is connected to a lifting cylinder 38 via a mounting base 371.

[0022] The lifting mechanism and the rotating mechanism drive the bored pile 3 to rotate and break the soil and drill holes. When encountering isolated rock landforms, the hammering cylinder 35 first drives the gravity hammer 34 to hammer the gravity block 33 downward, so that the gravity block 33 extends out of the bored pile 3 and repeatedly hits the rock first, breaking the large rock into small pieces of rock; after the gravity block 33 breaks the large isolated rock, the lifting cylinder 38 drives the vibration rod 36 to extend out of the vibration rod hole 32, and at the same time the rotating mechanism rotates the bored pile 3 to adjust the position of the vibration rod 36 so that the vibration rod 36 corresponds to the small rock. The vibration rod 36 is driven by the vibration chamber 37 to vibrate up and down at a high frequency, breaking the small rock into fine stones, thereby achieving the goal of quickly breaking the rock layer, greatly shortening the construction period, improving construction efficiency, being able to adapt to the complex geological conditions in areas with many isolated rocks, and ensuring the stability of construction.

[0023] The small stones generate fluid-like motion under the high-frequency up and down vibration of the vibration rod 36, reducing the friction between them and the bored pile 3, making it easier for the bored pile 3 to penetrate deeply into the underground and rotating and drilling, and also facilitating the subsequent hole cleaning operation.

[0024] The bored pile 3 is internally provided with a guide rod 381, with a stopper 382 at its bottom. The weight block 33 moves up and down along the guide rod 381 via a guide sleeve 383. A buffer spring 384 is provided on the exterior of the guide rod 381, located between the guide sleeve 383 and the stopper 382. The mounting base 371 is also slidably connected to the guide rod 381 via the guide sleeve 383. The guide rod 381 ensures that the weight block 33 and the vibrating rod 36 remain in a vertical orientation, preventing them from deflecting due to the influence of hard ground.

[0025] A pair of parallel drive shafts 41 are provided inside the vibration chamber 37. Each drive shaft 41 is equipped with an eccentric 42. The eccentrics 42 on the two drive shafts 41 are arranged in opposite directions. One end of each drive shaft 41 is provided with a mutually meshing transmission gear 43. The other end of one of the drive shafts 41 is provided with a transmission wheel 44. A drive motor is also provided inside the vibration chamber 37. The output shaft of the drive motor is provided with a driving wheel 45. A transmission belt 46 is provided between the driving wheel 45 and the transmission wheel 44. The eccentrics 42 on the drive shafts 41 generate irregular centrifugal forces when the drive shafts 41 rotate due to the offset center of gravity of the eccentrics 42. In this embodiment, two parallel drive shafts 41 are used, and the eccentric directions of the eccentric wheels 42 on the two drive shafts 41 are opposite. During operation, the drive motor drives the active wheel 45 to rotate, and the active wheel 45 drives the transmission wheel 44 and the drive shaft 41 connected to the transmission wheel 44 to rotate through the transmission belt 46. Due to the engagement of the transmission gear 43, the two drive shafts 41 and the eccentric wheels 42 rotate in opposite directions. The lateral vibrations caused by the eccentric wheels 42 offset each other, and the longitudinal vibrations are retained, so that the vibration chamber 37 vibrates periodically up and down, driving the vibration rod 36 to vibrate periodically up and down at a high frequency.

[0026] The vibration chamber 37 is provided with a long screw 47 connected to the mounting base 371. A shock-absorbing spring 48 is sleeved on the long screw 47. One end of the shock-absorbing spring 48 is connected to the vibration chamber 37, and the other end of the shock-absorbing spring 48 is connected to the mounting base 371. The long screw 47 and the shock-absorbing spring 48 cooperate to prevent vibrations in the vibration chamber 37 from affecting the mounting base 371, the lifting cylinder 38, and the bored pile 3.

[0027] The bottom of the gravity block 33 is provided with a plurality of impact blocks 331 distributed in an annular manner; the bottom of the bored pile 3 is provided with a plurality of cutting gears 51 distributed in an annular manner.

[0028] The rotating mechanism drives the bored pile 3 to rotate, and the cutting gear 51 is used to cut and drill the foundation. The gravity block 33 crushes the rock as a whole, and the impact block 331 concentrates the force to break the rock at a local point. The combination of local and overall crushing makes it easier to crush large rocks.

[0029] The cutting gears 51 are located on the inner edge, middle, and outer edge of the bored pile 3. The cutting gears 51 on the inner edge of the bored pile 3 cut inward, the cutting gears 51 in the middle of the bored pile 3 cut downward, and the cutting gears 51 on the outer edge of the bored pile 3 cut outward. During the rotation of the bored pile 3, the cutting gears 51 with different cutting directions can cut a wider range and cut soil and rock from different angles, thereby improving the degree and speed of soil and rock fragmentation.

Claims

1. A bored pile driving device for an area with many isolated rocks, comprising a main body (1), a frame (2) provided on the main body (1), a drill rod (21), a lifting mechanism for driving the drill rod (21) to rise and fall, and a rotating mechanism for driving the drill rod (21) to rotate, a bored pile (3) provided at the bottom end of the drill rod (21), and characterized in that: The bottom of the bored pile (3) is provided with a hammering hole (31) and a plurality of vibration rod holes (32) surrounding the hammering hole (31); a weight block (33) corresponding to the hammering hole (31) and a vibration rod (36) corresponding to the vibration rod hole (32) are provided inside the bored pile (3); a gravity hammer (34) driven by a hammering oil cylinder (35) is provided above the weight block (33); a vibration chamber (37) that vibrates up and down is fixedly connected to the upper end of the vibration rod (36); and the vibration chamber (37) is connected to a lifting oil cylinder (38) via a mounting seat (371).

2. The bored pile driving equipment for rocky areas according to claim 1 is characterized by: A guide rod (381) is provided inside the bored pile (3), a limit block (382) is provided at the bottom of the guide rod (381), the gravity block (33) moves up and down along the guide rod (381) through the guide sleeve (383), and a buffer spring (384) is provided outside the guide rod (381) between the guide sleeve (383) and the limit block (382).

3. The bored pile driving equipment for rocky areas according to claim 1 is characterized by: A pair of parallel drive shafts (41) are provided inside the vibration chamber (37), and an eccentric wheel (42) is provided on each of the two drive shafts (41). The eccentric directions of the eccentric wheels (42) on the two drive shafts (41) are relatively distributed. One end of the two drive shafts (41) is respectively provided with a mutually meshing transmission gear (43), and the other end of one of the drive shafts (41) is provided with a transmission wheel (44). A drive motor is also provided inside the vibration chamber (37), and a driving wheel (45) is provided on the output shaft of the drive motor. The driving wheel (45) and the transmission wheel (44) are driven by a transmission belt (46).

4. The bored pile driving equipment for rocky areas according to claim 1 is characterized by: The vibration chamber (37) is provided with a long screw (47) connected to the mounting seat (371), and a shock-absorbing spring (48) is sleeved on the long screw (47). One end of the shock-absorbing spring (48) is connected to the vibration chamber (37), and the other end of the shock-absorbing spring (48) is connected to the mounting seat (371).

5. The bored pile driving equipment for rocky areas according to claim 1 is characterized by: The bottom of the gravity block (33) is provided with a plurality of impact blocks (331) distributed in an annular manner; the bottom of the bored pile (3) is provided with a plurality of cutting gears (51) distributed in an annular manner.

6. The bored pile driving equipment for boulder-prone areas according to claim 5, characterized in that: The cutting gears (51) are respectively located at the inner edge, the middle and the outer edge of the bored pile (3); the cutting direction of the cutting gear (51) located at the inner edge of the bored pile (3) is inward, the cutting direction of the cutting gear (51) located at the middle of the bored pile (3) is downward, and the cutting direction of the cutting gear (51) located at the outer edge of the bored pile (3) is outward.

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