A high-penetration PVD hole-opening device

Abstract

The utility model aims to provide a high-penetration PVD hole-opening equipment with strong penetration ability and high hole-opening drilling efficiency. The utility model includes an excavator; a downward pressure device, which is arranged on the excavator and is used to apply downward pressure excitation; a hole-introducing pipe, which is arranged on the downward pressure device, and the hole-introducing pipe is provided with a water diversion pipe and a high-pressure head, the water diversion pipe is arranged in the middle of the hole-introducing pipe, and the high-pressure head is arranged at one end of the hole-introducing pipe, which is used to penetrate the soft soil layer; a water pump assembly, which is arranged around the excavator and connected to the hole-introducing pipe. The utility model is applied to the technical field of PVD hole-opening equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of PVD hole opening equipment, in particular to a high-penetration PVD hole opening equipment. Background Art

[0002] Common construction techniques for foundation treatment in coastal deep soft soil areas include preloading, vacuum preloading, and combined preloading with vacuum and preloading. The basic principle of these three techniques is consolidation and drainage. By constructing vertical drainage channels in the soft soil and increasing the preloading load, the consolidation and drainage of the soft soil layer is artificially accelerated, the physical and mechanical indicators of the soft soil layer are improved, and the settlement after construction is reduced. At present, PVD construction inserts the PVD into the soil layer through the oil motor of the hydraulic press or the vibrator of the vibrator. Generally, the standard penetration number can penetrate to the preset position if it is less than 12 hits. For soil layers with more than 12 hits, hole opening treatment is required. PVD hole opening treatment usually uses vibration or drilling. For vibration hole opening with a standard penetration number of more than 30 hits, it is determined that the hard soil layer cannot be penetrated, and it is necessary to use threaded drilling to open the hole.

[0003] A Chinese patent with publication number CN204716127U discloses a plastic drainage board punching machine which includes a pile frame, a pile frame guide groove, a fixed pulley block, a winch and a punching device. The pile frame guide groove, the fixed pulley block and the winch are respectively installed on the pile frame. The structure connects the soil layer with the atmosphere through an air guide hole structure to release the internal pressure of the soil layer and prevent the "pole clamping" situation. However, for places with harder soil layers, the rigid hole opening relying on the winch and the punching device is prone to damage to the equipment, and the hole opening efficiency is low. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a high-penetration PVD hole-opening device with strong penetration ability and high hole-opening drilling efficiency.

[0005] The technical solution adopted by the utility model is: the utility model includes an excavator; a downward pressure device, which is arranged on the excavator and is used to apply downward pressure excitation; a hole-introducing pipe, which is arranged on the downward pressure device, and the hole-introducing pipe is provided with a water diversion pipe and a high-pressure head, the water diversion pipe is arranged in the middle of the hole-introducing pipe, and the high-pressure head is arranged at one end of the hole-introducing pipe, and is used to penetrate a hard soil layer with a standard penetration number of more than 30 blows; a water pump assembly, which is arranged on the periphery of the excavator and is connected to the hole-introducing pipe.

[0006] Furthermore, the orifice pipe is formed with a slot, the high-pressure head is formed with a spray pipe, the high-pressure head is connected and fixed to the slot, the spray pipe is arranged in the middle of the high-pressure head and is connected to the water diversion pipe.

[0007] Furthermore, the high pressure head is formed with a drilling head with a gradually decreasing diameter.

[0008] Furthermore, the high pressure head and the orifice-leading pipe are fixed by welding.

[0009] Further, the injection pipe is formed with a hexagon socket screw.

[0010] Furthermore, the water pump assembly is provided with a high-pressure water pump and a high-pressure water pipe, the high-pressure water pump is arranged on one side of the pile driver, the first end of the high-pressure water pipe is connected to the high-pressure water pump, and the second end of the high-pressure water pipe is connected to the water diversion pipe.

[0011] Furthermore, the diameter of the orifice tube is 120 mm, a 20 mm steel pipe is arranged inside the orifice tube, and a 2.6 mm high-pressure water jetting hole is arranged at the water outlet end of the orifice tube.

[0012] The beneficial effect of the utility model is as follows: since the utility model adopts a water diversion pipe structure designed with a guide hole pipe, which is used to connect the high-pressure water pipe in the water pump assembly, when encountering a hard soil layer with a vibration hole penetration number of more than 30 hits, the high-pressure water pump pumps water along the high-pressure water pipe into the water diversion pipe, and the high-pressure head ejects high-pressure water, cutting the soil layer in the form of a water knife, and cooperates with the pressure or exciting force of the downward pressure assembly to make the guide hole pipe smoothly inserted to the preset depth, without the need to replace the drilling and threaded hole opening equipment, thereby improving the vibration hole opening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 It is a cross-sectional view of the hole-introducing pipe of the utility model.

[0015] In the figure: 1. excavator; 2. downward pressure device; 3. orifice pipe; 4. water diversion pipe; 5. high-pressure head; 6. injection pipe; 7. high-pressure water pump; 8. high-pressure water pipe; 9. hexagon socket screw; 10. water outlet. DETAILED DESCRIPTION

[0016] like Figure 1 to Figure 2As shown, in this embodiment, the utility model includes an excavator 1; a downward pressure device 2, which is arranged on the excavator 1 and is used to apply downward pressure excitation; a hole-introducing pipe 3, which is arranged on the downward pressure device 2, and the hole-introducing pipe 3 is provided with a water diversion pipe 4 and a high-pressure head 5, the water diversion pipe 4 is arranged in the middle of the hole-introducing pipe 3, and the high-pressure head 5 is arranged at one end of the hole-introducing pipe 3, and is used to penetrate a hard soil layer with a standard penetration number of more than 30 blows; a water pump assembly, which is arranged on the periphery of the excavator 1 and connected to the hole-introducing pipe 3, and the downward pressure device 2 is a hydraulic motor or a vibration excitation device. The motor is used to apply vertical downward pressure or exciting force to make the borehole pipe 3 drill into the soil layer. The water diversion pipe 4 structure designed for the borehole pipe 3 is used to connect the high-pressure water pipe 8 in the water pump assembly. When encountering a hard soil layer with a vibration hole penetration number of more than 30 hits, the high-pressure water pump 7 pumps water along the high-pressure water pipe 8 into the water diversion pipe 4, and the high-pressure head 5 ejects high-pressure water to cut the soil layer in the form of a water knife. The pressure or exciting force of the downward pressure assembly makes the borehole pipe 3 smoothly inserted to the preset depth without the need to replace the drilling and threaded hole-opening equipment, thereby improving the hole-opening efficiency.

[0017] In this embodiment, the orifice tube 3 is formed with a slot, and the high-pressure head 5 is formed with an injection pipe 6. The high-pressure head 5 is connected and fixed to the slot. The injection pipe 6 is arranged in the middle of the high-pressure head 5 and is connected to the water diversion pipe 4. The diameter of the injection pipe 6 is smaller than the diameter of the water diversion pipe 4. The diameter of the injection pipe 6 is 2.6 mm. The water flows along the injection pipe 6 to spray a high-pressure water column to form a water knife for cutting the hard mud layer. The hard mud layer is softened after cutting, which is convenient for the downward pressure device 2 to vibrate the orifice tube 3 to insert into the soil layer.

[0018] In this embodiment, the high pressure head 5 is formed with a drilling head with a gradually decreasing diameter, and the drilling head with a gradually decreasing diameter is used to apply pressure to the soil layer to improve the drilling efficiency of the borehole pipe 3.

[0019] In this embodiment, the high-pressure head 5 and the hole-introducing tube 3 are fixed by welding. The welding fixation method makes the overall structure stable and is not easy to loosen under high pressure, thereby ensuring the hole-opening effect.

[0020] In this embodiment, the injection pipe 6 is formed with a hexagon socket screw 9, which is arranged at one end of the high-pressure head 5. The outlet end 10 of the high-pressure head 5 is drilled with a length of 5 cm, and the inner diameter of the hole is 2.6 mm. Since the high-pressure water injection aperture is 2.6 mm, the length of the high-pressure head 5 is 25 cm, and the diameter of the injection pipe 6 in the high-pressure head 5 is also 2.6 mm. The main function of the hexagon socket screw 9 is to lock the injection pipe 6 in the high-pressure head 5.

[0021] In this embodiment, the water pump assembly is provided with a high-pressure water pump 7 and a high-pressure water pipe 8. The high-pressure water pump 7 is arranged on one side of the pile driver. The first end of the high-pressure water pipe 8 is connected to the high-pressure water pump 7, and the second end of the high-pressure water pipe 8 is connected to the water diversion pipe 4. The pressure of the high-pressure water pump 7 reaches 10-20Mpa, and it can penetrate the soil layer with a standard penetration number of less than 60 blows in conjunction with the downward pressure device 2.

[0022] In this embodiment, the diameter of the orifice-introducing pipe 3 is 120 mm, a 20 mm steel pipe is arranged inside the orifice-introducing pipe 3, and a 2.6 mm high-pressure water jetting hole is arranged at the water outlet end 10 of the orifice-introducing pipe 3.

[0023] The working principle of this utility model:

[0024] The borehole guide pipe 3 is connected to one side of the output end of the downward pressure device 2, and the excavator 1 moves to the corresponding hole opening position. The downward pressure device 2 drives the borehole guide pipe 3 to vibrate and insert downward. When encountering a hard soil layer with a vibration hole penetration number of more than 30 hits, the high-pressure water pump 7 pumps water along the high-pressure water pipe 8 into the water guide pipe 4, and the high-pressure head 5 ejects high-pressure water to cut the soil layer in the form of a water knife, and cooperates with the pressure or exciting force of the downward pressure component to make the borehole guide pipe 3 smoothly inserted to the preset depth.

[0025] Although the embodiments of the present invention are described with practical solutions, they do not constitute limitations on the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A high-penetration PVD hole-opening device, characterized in that: include Excavator (1); A downward pressure device (2), arranged on the excavator (1), for applying downward pressure vibration; A borehole guide pipe (3) is arranged on the pressure-down device (2), the borehole guide pipe (3) is provided with a water guide pipe (4) and a high pressure head (5), the water guide pipe (4) is arranged in the middle of the borehole guide pipe (3), and the high pressure head (5) is arranged at one end of the borehole guide pipe (3), and is used for hard soil layers with a standard penetration number of more than 30 blows; A water pump assembly is arranged around the excavator (1) and is connected to the orifice pipe (3).

2. A high-penetration PVD hole-opening device according to claim 1, characterized in that: The orifice-drawing pipe (3) is formed with a slot, the high-pressure head (5) is formed with a spray pipe (6), the high-pressure head (5) is connected and fixed to the slot, and the spray pipe (6) is arranged in the middle of the high-pressure head (5) and is in communication with the water-drawing pipe (4).

3. A high-penetration PVD hole-opening device according to claim 2, characterized in that: The high pressure head (5) is formed with a drilling head with a gradually decreasing diameter.

4. A high-penetration PVD hole-opening device according to claim 2, characterized in that: The high-pressure head (5) and the orifice-leading pipe (3) are fixed by welding.

5. The high-penetration PVD hole-opening device according to claim 2, characterized in that: The injection pipe (6) is formed with a hexagon socket screw (9).

6. The high-penetration PVD hole-opening device according to claim 1, characterized in that: The water pump assembly is provided with a high-pressure water pump (7) and a high-pressure water pipe (8); the high-pressure water pump (7) is arranged on one side of the excavator (1); the first end of the high-pressure water pipe (8) is connected to the high-pressure water pump (7); and the second end of the high-pressure water pipe (8) is connected to the water diversion pipe (4).

7. The high-penetration PVD hole-opening device according to claim 1, characterized in that: The diameter of the orifice-guiding pipe (3) is 120 mm, a 20 mm steel pipe is arranged inside the orifice-guiding pipe, and a 2.6 mm high-pressure water jetting hole is arranged at the water outlet end (10) of the orifice-guiding pipe.

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