A pile foundation assembly device for rapid drilling in complex geology

Abstract

The present invention relates to the technical field of building foundation engineering construction equipment, and specifically to a pile foundation assembly equipment for rapid drilling in complex geology, which comprises: a cylinder, which is formed by splicing a plurality of casing sections in sequence, wherein a fixed disk is fixedly arranged in the cylinder; a connecting cylinder, which is arranged on the cylinder and is rotatably connected to the cylinder; a hydraulic vibration hammer, which is arranged on the top of the connecting cylinder; a rotary drilling machine, which is used to drive the fixed disk to rotate; and a plurality of drill bits, which are arranged circumferentially along the bottom of the cylinder, and the diameter of the circumscribed circle of the parallel projections of the plurality of drill bits on the horizontal plane is greater than the outer diameter of the cylinder. The present invention has the advantages of reducing the lateral friction between the steel casing and the hole wall, improving the drilling efficiency, and solving the problem of wall protection.

Description

Technical Field

[0001] The invention relates to the technical field of building foundation engineering construction equipment, and in particular to a pile foundation assembly device for rapid hole formation in complex geology. Background Art

[0002] Bored cast-in-place piles refer to piles made by forming pile holes in the foundation soil at the construction site through mechanical drilling, steel pipe squeezing or manual excavation, placing a steel cage inside and pouring concrete.

[0003] At present, when drilling in complex strata, such as strata containing miscellaneous fill, sand and gravel layers, boulder layers and boulders, a commonly used method is to use steel casing and a pipe rolling machine. The rotary drilling rig first excavates the debris, and then the pipe rolling machine drives the steel casing to follow up at any time to prevent the hole wall or hole mouth from collapsing during the drilling process.

[0004] However, if the pile is too long (for example, more than 40 meters), the depth of the borehole will increase accordingly, so that when the steel casing is drilling downward, the lateral friction resistance between the steel casing and the hole wall will be too large, making it impossible for the pipe rolling machine to roll it, and the steel casing will be easily stuck and unable to be pulled out of the hole. When encountering isolated rocks, after drilling through the rock layer with a rotary drill, it is still necessary to use a reaming drill bit for secondary reaming before the steel casing can be lowered, which is very time-consuming and has low drilling efficiency. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a pile foundation assembly device for rapid drilling in complex geological conditions, which has the advantages of reducing the lateral friction between the steel casing and the hole wall and improving the drilling efficiency.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A pile foundation assembly device for rapid drilling in complex geology, comprising:

[0008] The cylinder body is formed by sequentially splicing together a plurality of casing sections, and a fixing plate is fixedly arranged inside the cylinder body;

[0009] A connecting cylinder is disposed on the cylinder body and is rotatably connected to the cylinder body;

[0010] A hydraulic vibration hammer is arranged on the top of the connecting cylinder;

[0011] A rotary drilling rig is used to drive the fixed plate to rotate;

[0012] A plurality of drill bits are provided, and the plurality of drill bits are arranged circumferentially along the bottom of the cylinder body, and the diameter of the circumscribed circle of the parallel projections of the plurality of drill bits on the horizontal plane is greater than the outer diameter of the cylinder body.

[0013] Furthermore, the diameter of the circumscribed circle of the parallel projections of the plurality of drill bits on the horizontal plane is 20-50 mm larger than the outer diameter of the cylinder.

[0014] Furthermore, the inner wall and the outer wall of the lower end of the cylinder are respectively provided with reinforcement plates.

[0015] Furthermore, two adjacent sections of the casing are connected by multiple groups of fixing components, each group of the fixing components includes a first clamping plate and a second clamping plate whose one end is respectively fixed to the inner and outer walls of one section of the casing, and a locking bolt passing through the second clamping plate, the other ends of the first clamping plate and the second clamping plate are respectively clamped to the inner and outer walls of the adjacent casing, and the locking bolt passes through the side wall of the casing and is threadedly connected to the first clamping plate.

[0016] Furthermore, the fixing assembly also includes a plurality of grooves opened on the end surface of one section of the casing and a plurality of tenons fixed on the end of another section of the casing, the plurality of tenons correspond one-to-one to the plurality of grooves, and the tenons are plug-fitted into the grooves.

[0017] Furthermore, the drill rod of the rotary drilling machine passes through the connecting tube from the top of the connecting tube, and the fixing plate is provided with a slot for engaging with the transmission shaft of the drill rod of the rotary drilling machine, and the cross section of the slot is non-circular.

[0018] Furthermore, a shock-absorbing spring is arranged at one end of the rotary drilling rig drill rod close to the fixed plate.

[0019] Furthermore, a clamp is sleeved on the connection between the cylinder body and the connecting cylinder.

[0020] Furthermore, the clamp includes a vertical connecting plate and an upper hoop plate and a lower hoop plate respectively fixedly connected to the upper and lower ends of the vertical connecting plate, the vertical connecting plate, the upper hoop plate and the lower hoop plate are connected in a C-shape, a first anti-slip plate is circumferentially arranged on the side wall of the cylinder, a second anti-slip plate is circumferentially arranged on the side wall of the connecting cylinder, and the first anti-slip plate and the second anti-slip plate are arranged between the upper hoop plate and the lower hoop plate.

[0021] Furthermore, a plurality of balls are arranged between the lower hoop plate and the first anti-slip plate.

[0022] The beneficial effects of the present invention are:

[0023] The barrel of the present invention is formed by splicing a plurality of casings in sequence, so that the length of the barrel of the present invention can be adjusted according to the drilling depth. The purpose of adjusting the length of the barrel can be achieved by increasing or decreasing the number of casings, so that the barrel of the present invention is suitable for drilling holes of different depths.

[0024] The plurality of drill bits of the present invention are arranged along the circumference of the bottom of the cylinder, and the diameter of the circumscribed circle of the parallel projections of the plurality of drill bits on the horizontal plane is larger than the outer diameter of the cylinder, so that the diameter of the hole drilled by the drill bit is larger than the diameter of the cylinder, thereby reducing the friction between the cylinder and the side wall of the hole, facilitating the rapid downward drilling of the cylinder, and improving the drilling rate;

[0025] When the equipment of the present invention is working, the hydraulic vibratory hammer is started, the connecting cylinder is driven to vibrate through the hydraulic vibratory hammer, and the vibration force is transmitted from the cylinder body to the drill bit through the connecting cylinder, and the rock and soil are broken by the vibration of the drill bit. At the same time, the rotary drilling machine is started, and the fixed plate is driven to rotate through the drill rod of the rotary drilling machine, thereby driving the cylinder body and the drill bit to rotate. When the cylinder body and the drill bit rotate, the rock can be further ground, so that the cylinder body and the drill bit can drill downward quickly under the action of double force. When a sand and gravel layer is encountered, the vibration of the hydraulic vibratory hammer is used to compact the sand and soil, thereby achieving the purpose of rapid drilling. In addition, when encountering small pebbles, the vibration and rotation of the drill bit and the cylinder body can squeeze them away, while larger ones can be directly crushed by vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 is a top view of an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of an embodiment of the present invention;

[0029] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0030] Explanation of the reference numerals: 10, cylinder; 11, casing; 12, fixing plate; 13, reinforcing plate; 14, first anti-slip plate; 15, slot; 20, connecting cylinder; 21, second anti-slip plate; 30, hydraulic vibration hammer; 40, drill rod; 41, shock-absorbing spring; 50, drill bit; 60, fixing assembly; 61, first clamping plate; 62, second clamping plate; 63, locking bolt; 64, groove; 65, tenon; 70, clamp; 71, vertical connecting plate; 72, upper hoop plate; 73, lower hoop plate; 74, ball bearing. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0032] A pile foundation assembly equipment for rapid drilling in complex geology, such as Figure 1-2 As shown, it includes a cylinder 10, a connecting cylinder 20, two hydraulic vibration hammers 30, a rotary drilling machine and a plurality of drill bits 50.

[0033] The barrel 10 is formed by sequentially splicing together a plurality of casings 11, so that the length of the barrel 10 of the present invention can be adjusted according to the drilling depth. The purpose of adjusting the length of the barrel 10 can be achieved by increasing or decreasing the number of casings 11, so that the barrel 10 of the present invention is suitable for drilling holes of different depths.

[0034] A fixed plate 12 is fixedly disposed in the cylinder 10, and the connecting cylinder 20 is disposed on the cylinder 10 and is rotatably connected to the cylinder 10. The hydraulic vibration hammer 30 is disposed on the top of the connecting cylinder 20. The rotary drilling machine is used to drive the fixed plate 12 to rotate.

[0035] Specifically, in this embodiment, the connecting tube 20 and the casing 11 are both steel tubes with a wall thickness of 20 mm and a length of 3 m, which is conducive to improving the strength and friction resistance of the connecting tube 20 and the casing 11, making it difficult for the connecting tube 20 and the casing 11 to deform during the drilling process, thereby improving the construction efficiency and quality. The fixing plate 12 is a steel disc, and the fixing plate 12 is welded and fixed to the inner wall of the cylinder body 10. The steel disc and the welding fixing method have high strength, which is conducive to improving the bearing capacity of the fixing plate 12 and avoiding deformation of the fixing plate 12 and affecting the construction quality.

[0036] Specifically, in this embodiment, the clamps of the two hydraulic vibratory hammers 30 are respectively clamped on the top of the connecting cylinder 20, and the two hydraulic vibratory hammers 30 are symmetrically arranged on the top of the connecting cylinder 20, which is conducive to uniform force on both sides of the connecting cylinder 20, ensuring that the cylinder body 10 and the drill bit 50 drill vertically downward, and the drill rod 40 of the rotary drilling rig penetrates into the connecting cylinder 20 through the gap between the two hydraulic vibratory hammers 30 and drives the fixed plate 12 to rotate.

[0037] Multiple drill bits 50 are arranged circumferentially along the bottom of the barrel 10, and the diameter D1 of the circumscribed circle of the parallel projections of the multiple drill bits 50 on the horizontal plane is larger than the outer diameter D2 of the barrel 10, so that the diameter of the hole drilled by the drill bit 50 is larger than the diameter of the barrel 10, reducing the friction between the barrel 10 and the side wall of the hole, facilitating the barrel 10 to drill downward quickly, and improving the drilling rate.

[0038] During specific operation, the hydraulic vibratory hammer 30 is started, and the connecting cylinder 20 is driven to vibrate by the hydraulic vibratory hammer 30, and the vibration force is transmitted from the cylinder body 10 to the drill bit 50 through the connecting cylinder 20, and the rock and soil are broken by the vibration of the drill bit 50. At the same time, the rotary drilling machine is started, and the fixed plate 12 is driven to rotate by the drill rod 40 of the rotary drilling machine, thereby driving the cylinder body 10 and the drill bit 50 to rotate. When the cylinder body 10 and the drill bit 50 rotate, the rock can be further ground, so that the cylinder body 10 and the drill bit 50 can drill downward quickly under the action of the double force. When encountering a sand and gravel layer, the cylinder body 10 and the drill bit 50 are compacted by the vibration of the hydraulic vibratory hammer 30, thereby achieving the purpose of rapid drilling. In addition, when encountering small pebbles, the vibration and rotation of the drill bit 50 and the cylinder body 10 can squeeze it away, while larger ones can be directly crushed by vibration.

[0039] Furthermore, the diameter D1 of the circumscribed circle of the parallel projection of the plurality of drill bits 50 on the horizontal plane is 20-50 mm larger than the outer diameter D2 of the cylinder 10, so that the diameter of the hole drilled by the drill bit 50 meets the construction requirements, the friction between the hole wall and the cylinder 10 can be reduced, the service life of the cylinder 10 can be extended, and the drilling rate can be increased. Specifically, the width of the annular groove drilled by the plurality of drill bits 50 is 80-120 mm.

[0040] Furthermore, adjacent drill bits 50 are tightly fitted together so that stones will not get stuck in the gaps between the adjacent drill bits 50 when the drill bits 50 are drilling, which is beneficial to protecting the drill bits 50 and extending the service life of the drill bits 50.

[0041] Furthermore, in order to improve the strength of the lower end of the cylinder 10 and prevent the lower end of the cylinder 10 from being deformed when drilling downward, the inner wall and the outer wall of the lower end of the cylinder 10 are respectively welded with a reinforcing plate 13, and the reinforcing plate 13 is arranged circumferentially along the inner and outer walls of the cylinder 10. Specifically, the thickness of the reinforcing plate 13 is greater than or equal to 20 mm.

[0042] Furthermore, if Figure 3 As shown, two adjacent sections of casing 11 are connected by multiple groups of fixing components 60, each group of the fixing components 60 includes a first clamping plate 61 and a second clamping plate 62, one end of which is respectively welded to the inner and outer walls of one section of the casing 11, and a locking bolt 63 passing through the second clamping plate 62, the other ends of the first clamping plate 61 and the second clamping plate 62 are respectively clamped on the inner and outer walls of the adjacent casing 11, and the locking bolt 63 passes through the side wall of the casing 11 and is threadedly connected to the first clamping plate 61.

[0043] In this embodiment, the first clamping plate 61 and the second clamping plate 62 are arranged at the bottom of the casing 11 located above, and the first clamping plate 61 and the second clamping plate 62 are respectively arranged along the inner and outer wall circumferential directions of the casing 11, and the first clamping plate 61 and the second clamping plate 62 extend out of the lower end surface of the casing 11 by 150 mm, so that the first clamping plate 61 and the second clamping plate 62 can firmly clamp the side wall of the casing 11 below, and the first clamping plate 61 is provided with a plurality of first connecting holes (not marked in the figure), and the second clamping plate is provided with a plurality of second connecting holes (not marked in the figure) corresponding to the plurality of first connecting holes one by one, and the locking bolt 63 is slidably connected to the second connecting hole, and the locking bolt 63 is threadedly connected to the first connecting hole, and the side wall of the casing 11 located adjacent to the bottom is provided with a third connecting hole (not marked in the figure) connected to the first connecting hole and the second connecting hole. During specific use, the lower end of the upper casing 11 is aligned with the upper end of the adjacent casing 11 below, and the first clamping plate 61 and the second clamping plate 62 respectively clamp the inner and outer walls of the adjacent casing 11 below, and the position of the upper casing 11 is adjusted to align the first connecting hole and the second connecting hole with the third connecting hole, and then the locking bolt 63 is inserted from the second connecting hole into the third connecting hole, and the locking bolt 63 is further screwed into the first connecting hole to fix the upper and lower adjacent sections of casing 11.

[0044] Furthermore, the fixing assembly 60 also includes a plurality of grooves 64 provided on the end surface of one section of the casing 11 and a plurality of tenons 65 fixedly provided on the end of another section of the casing 11, and the plurality of tenons 65 correspond to the plurality of grooves 64 one by one, and the tenons 65 are plugged and matched with the grooves 64. Specifically, the tenons 65 are provided on the lower end surface of the casing 11 located above, and the grooves 64 are provided on the upper end surface of the casing 11 adjacent below, so as to facilitate the insertion of the tenons 65 into the grooves 64. By providing the tenons 65 and the grooves 64, it is more conducive to the upper casing 11 to transmit torque to the casing 11 adjacent below, and further improves the stability of the cylinder body 10 when rotating.

[0045] Furthermore, if Figure 2 As shown, a clamp 70 is sleeved at the connection between the cylinder body 10 and the connecting cylinder 20, so that the cylinder body 10 can rotate while the cylinder body 10 and the connecting cylinder 20 are connected.

[0046] Specifically, the clamp 70 includes a vertical connecting plate 71 and an upper hoop plate 72 and a lower hoop plate 73 respectively fixedly connected to the upper and lower ends of the vertical connecting plate 71, and the vertical connecting plate 71, the upper hoop plate 72 and the lower hoop plate 73 are connected in a C-shape. A first anti-slip plate 14 is circumferentially arranged on the side wall of the cylinder 10, and a second anti-slip plate 21 is circumferentially arranged on the side wall of the connecting cylinder 20, and the first anti-slip plate 14 and the second anti-slip plate 21 are arranged between the upper hoop plate 72 and the lower hoop plate 73, so that the connecting cylinder 20 and the cylinder 10 will not be separated when the connecting cylinder 20 and the cylinder 10 are pulled out of the drill hole.

[0047] Furthermore, in order to ensure that the casing 11 can rotate flexibly, a plurality of balls 74 are arranged between the lower hoop plate 73 and the first anti-slip plate 14. The balls 74 are helpful in reducing the friction between the lower hoop plate 73 and the first anti-slip plate 14, which not only enables the casing 11 to rotate flexibly, but also reduces the wear of the lower hoop plate 73 and the first anti-slip plate 14.

[0048] Furthermore, in order to facilitate the disassembly and assembly of the rotary excavator, the fixed plate 12 is provided with a slot 15 that is engaged with the drive shaft of the drill rod 40 of the rotary excavator, and the cross section of the slot 15 is non-circular. When in use, the drive shaft of the drill rod 40 of the rotary excavator is inserted into the slot 15 of the fixed plate 12, so that when the drive shaft of the drill rod 40 of the rotary excavator rotates, the fixed plate 12 and the cylinder 10 can be driven to rotate synchronously. The engaging connection method is conducive to improving the disassembly and assembly efficiency of the rotary excavator, thereby improving the construction efficiency.

[0049] Furthermore, in order to protect the drill rod 40 of the rotary drilling rig, a shock absorbing spring 41 is provided at one end of the drill rod 40 of the rotary drilling rig close to the fixed plate 12, which can avoid a hard collision between the drill rod 40 of the rotary drilling rig and the fixed plate 12, thereby helping to extend the service life of the rotary drilling rig.

[0050] Working principle:

[0051] During specific operation, the hydraulic vibratory hammer 30 is started, and the connecting cylinder 20 is driven to vibrate by the hydraulic vibratory hammer 30, and the vibration force is transmitted from the cylinder body 10 to the drill bit 50 through the connecting cylinder 20, and the rock and soil are broken by the vibration of the drill bit 50. At the same time, the rotary drilling machine is started, and the fixed plate 12 is driven to rotate by the drill rod 40 of the rotary drilling machine, thereby driving the cylinder body 10 and the drill bit 50 to rotate. When the cylinder body 10 and the drill bit 50 rotate, the rock can be further ground, so that the cylinder body 10 and the drill bit 50 can drill downward quickly under the action of the double force. When encountering a sand and gravel layer, the cylinder body 10 and the drill bit 50 are compacted by the vibration of the hydraulic vibratory hammer 30, thereby achieving the purpose of rapid drilling. In addition, when encountering small pebbles, the vibration and rotation of the drill bit 50 and the cylinder body 10 can squeeze it away, while larger ones can be directly crushed by vibration.

[0052] The rotary drilling machine can accurately locate and adjust the verticality. The selection of the hydraulic vibratory hammer 30 and the rotary drilling machine model parameters should be determined according to the geological conditions and the borehole diameter, depth, etc. After drilling a section of casing 11, remove the connecting bolts of the casing 11 on the ground, then install another section of casing 11, and continue drilling until the designed pile length is reached. In order to reduce the friction of the side wall, mud can be prepared and injected around the casing 11 to allow the mud to play a lubricating role. After the casing 11 reaches the bottom, remove the hydraulic vibratory hammer 30, remove the clamp 70, the connecting tube 20 and the cylinder 10, and then use the impact grab drill to grab the slag in the casing 11. When encountering a relatively complete and large core that cannot be grabbed with a grab bucket, use an impact hammer to repeatedly impact it and break it before grabbing it. After the dregs are dug, the steel cage is lowered and concrete is poured. While pouring, the hydraulic vibrating hammer 30 reinstalled on the top surface of the casing 11 is vibrated to pull out the casing upward until the casing 11 is completely pulled out. The pile formation is completed and the construction of the next pile can be transferred.

[0053] In summary, the equipment of the present invention can be used to drill into very complex strata, and the drilling speed can be increased by more than 2 times. For example, a rotary drilling machine can drill 0.3-0.4 meters per hour to drill boulders, while the equipment of the present invention can drill more than 1 meter per hour, which is about 3 times the speed of a rotary drilling machine. On the other hand, the equipment of the present invention will not collapse the hole wall or hole mouth when drilling because of the advance support of the cylinder 10, so that the amount of concrete poured can be reduced to a minimum, that is, the filling coefficient is minimized, saving material costs.

[0054] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A pile foundation assembly equipment for rapid drilling in complex geology. Features: include: The cylinder body is formed by sequentially splicing together a plurality of casing sections, and a fixing plate is fixedly arranged inside the cylinder body; A connecting cylinder is disposed on the cylinder body and is rotatably connected to the cylinder body; A hydraulic vibration hammer is arranged on the top of the connecting cylinder; A rotary drilling rig is used to drive the fixed plate to rotate; A plurality of drill bits are provided, the plurality of drill bits are arranged along the circumference of the bottom of the cylinder, and the diameter of the circumscribed circle of the parallel projections of the plurality of drill bits on the horizontal plane is greater than the outer diameter of the cylinder; A shock absorbing spring is arranged at one end of the drill rod of the rotary drilling machine close to the fixed plate; A clamp is sleeved at the connection between the cylinder body and the connecting cylinder; The clamp comprises a vertical connecting plate and an upper hoop plate and a lower hoop plate respectively fixedly connected to the upper and lower ends of the vertical connecting plate, the vertical connecting plate, the upper hoop plate and the lower hoop plate are connected in a C-shape, a first anti-slip plate is circumferentially arranged on the side wall of the cylinder, a second anti-slip plate is circumferentially arranged on the side wall of the connecting cylinder, and the first anti-slip plate and the second anti-slip plate are arranged between the upper hoop plate and the lower hoop plate; A plurality of balls are arranged between the lower hoop plate and the first anti-slip plate.

2. A pile foundation assembly device for rapid drilling in complex geology according to claim 1, Features: The diameter of the circumscribed circle of the parallel projections of the plurality of drill bits on the horizontal plane is 20-50 mm larger than the outer diameter of the cylinder.

3. A pile foundation assembly device for rapid drilling in complex geology according to claim 1, Features: The inner wall and the outer wall of the lower end of the cylinder are respectively provided with reinforcement plates.

4. A pile foundation assembly device for rapid drilling in complex geology according to claim 1, Features: Two adjacent sections of casing are connected by multiple groups of fixing components, each group of the fixing components includes a first clamping plate and a second clamping plate one end of which are respectively fixed to the inner and outer walls of one section of the casing, and a locking bolt passing through the second clamping plate, the other ends of the first clamping plate and the second clamping plate are respectively clamped to the inner and outer walls of the adjacent casing, and the locking bolt passes through the side wall of the casing and is threadedly connected to the first clamping plate.

5. A pile foundation assembly device for rapid drilling in complex geology according to claim 4, Features: The fixing assembly also includes a plurality of grooves opened on the end surface of one section of the casing and a plurality of tenons fixedly arranged on the end of another section of the casing, the plurality of tenons correspond to the plurality of grooves one by one, and the tenons are plug-fitted with the grooves.

6. A pile foundation assembly device for rapid drilling in complex geology according to claim 1, Features: The drill rod of the rotary drilling machine passes through the connecting tube from the top of the connecting tube, and the fixing plate is provided with a slot for engaging with the transmission shaft of the drill rod of the rotary drilling machine, and the cross section of the slot is non-circular.

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