A vibroflotation pile forming system combined with the immersed tube method and a vibroflotation pile forming construction process

Abstract

The present application relates to a vibroflotation pile forming system combined with the immersed tube method, belonging to the technical field of sand-gravel pile construction. It includes a guide pipe, and a first shock absorber, a vibrator and an eccentric hammer are sequentially connected to the bottom of the guide pipe. The guide pipe is also provided with a feed pipe, one end of the feed pipe is connected with a second shock absorber, the second shock absorber is communicated with a discharge pipe, the discharge pipe is connected with the vibrator and the eccentric hammer, a valve pile tip is hinged to the discharge pipe, a storage bin is arranged on the feed pipe, the storage bin is communicated with the feed pipe, a frame body is jointly arranged on the guide pipe and the storage bin, a feeding device for pouring sand and gravel into the storage bin is arranged on the frame body, and a feeding device for smoothly discharging the sand and gravel from the discharge pipe is arranged on the storage bin. The present application has the effect of being able to smoothly construct long piles with large diameters under poor geological conditions and improving the construction quality of sand-gravel piles.

Description

Technical Field

[0001] The present application relates to the technical field of sand-gravel pile construction, and particularly to a vibroflotation pile forming system combined with the pipe sinking method and a vibroflotation pile forming construction process. Background Art

[0002] At present, there are usually two construction processes for sand-gravel pile construction: the vibroflotation method and the pipe sinking method. In the pipe sinking method construction, the pile driver is positioned, the split pile tip is closed, the pipe pile is vertically lowered, and then the vibration hammer is started to vibrate the top of the pipe pile up and down to make the pile tip penetrate into the soil and form a hole. After the pipe sinking reaches the designed depth, sand-gravel perfusion operation is carried out, and sand-gravel is injected into the pile pipe from the feeding port. When the height of the sand-gravel filled in the pipe is sufficient, the pipe can be pulled out. When pulling out the pipe, it is vibrated while pulling out, and when pulling out a certain height, the vibration is stopped and the pipe is inserted backward to compact the sand-gravel material. Through the repeated processes of filling, vibrating and pulling out the pipe, vibrating and inserting backward, the construction of the sand-gravel pile is finally completed.

[0003] In the vibroflotation method construction, a shock absorber, a vibrator and an eccentric hammer are successively connected to the bottom of the guide pipe. The vibrator drives the eccentric hammer to penetrate into the soil to form a hole. At the same time, the high-pressure water in the guide pipe is discharged from the vibrator to cut the soil and discharge the fine particles in the soil. After the pile depth reaches the set strength, the sand-gravel material is piled on the ground, and the sand-gravel material is poured into the pile from the ground orifice while the vibrator vibrates and compacts the sand-gravel material. Through gradually vibrating the sand-gravel material, the construction of the sand-gravel pile is finally completed.

[0004] In view of the above related technologies, when the vibroflotation method is used for construction, since the feeding from the ground orifice is affected by the geological conditions, when encountering silty soil layers, the formed holes are prone to silt backlog, resulting in problems such as pile holding at the orifice and poor feeding at the bottom of the hole, thus making the filling in the pile not dense, and the reliability of the construction quality is easily interfered. When the pipe sinking method is used for construction, the pipe sinking method is less affected by silt backlog, but for long piles with large diameters, it is required that the vibration hammer has a large energy. The large-sized vibration hammer and the pipe itself have large masses and the center of gravity position of the equipment is high, which requires a large-sized pile driving frame, so the requirement for the ground bearing capacity is also high. In actual construction, the ground bearing capacity of the foundation to be treated is very poor and cannot meet the construction needs of too large equipment. Therefore, in actual construction, the pipe sinking method is less used for large-diameter sand-gravel piles. Therefore, at present, neither of the two construction processes can smoothly carry out the construction of long piles with large diameters under poor geological conditions, and the construction quality cannot be guaranteed. Summary of the Invention

[0005] In order to smoothly construct long piles with large diameters under poor geological conditions and improve the construction quality of sand-gravel piles, the present application provides a vibroflotation pile forming system combined with the pipe sinking method and a vibroflotation pile forming construction process.

[0006] In the first aspect, a vibroflotation pile forming system combined with the pipe sinking method provided by the present application adopts the following technical solutions:

[0007] A vibroflotation pile forming system combined with the immersed tube method, comprising a guide pipe. A first shock absorber, a vibrator and an eccentric hammer are sequentially connected to the bottom of the guide pipe. A feed pipe is arranged on the guide pipe. One end of the feed pipe is connected to a second shock absorber and communicated with the second shock absorber. The second shock absorber is communicated with a discharge pipe. The discharge pipe is connected to the vibrator. A valve pile tip is hinged to the discharge pipe. A frame body is jointly arranged on the guide pipe and the feed pipe. A feeding device for pouring sand and gravel into the feed pipe is arranged on the frame body. A feeding device for discharging the sand and gravel in the feed pipe into the discharge pipe is arranged on the feed pipe.

[0008] By adopting the above technical solution, when constructing a pile hole, the vibrator is started, and the vibrator drives the eccentric hammer to vibrate and form a hole. When forming the hole, the feed pipe and the discharge pipe are inserted into the soil together with the guide pipe. When the hole forming reaches the designed depth, the feeding device pours the sand and gravel into the feed pipe. After the filling is completed, the guide pipe, the feed pipe and the discharge pipe are simultaneously lifted. During the lifting process, the valve pile tip automatically opens. Then the feeding device is started to discharge the sand and gravel from the discharge pipe and pour the sand and gravel into the pile hole. When a specified height of sand and gravel is poured into the pile hole, the guide pipe and the discharge pipe are inserted reversely to vibrate and compact the sand and gravel. At this time, the valve pile tip is automatically closed by extrusion, and the sand and gravel are compacted by extrusion and vibration during the reverse insertion. Through repeated filling, lifting and reverse insertion and compaction, the construction of the sand pile is finally realized.

[0009] After vibroflotation hole forming, compared with the traditional vibroflotation process, the sand and gravel can be directly poured into the bottom of the hole, reducing the occurrence of situations such as mud backlog causing pile holding at the hole opening and poor feeding at the bottom of the hole. The sand and gravel are poured into the bottom of the hole like the immersed tube method. At the same time, the guide pipe and the feed pipe are inserted reversely to play a role of extrusion and compaction like the immersed tube method construction, ensuring the sufficient filling amount, solving the problem that it is difficult to construct large-diameter long piles by the immersed tube method. Moreover, the sand and gravel in the pile hole are horizontally vibrated and compacted by the vibrator, thus more effectively improving the pile forming effect. By combining the construction processes of the immersed tube method and the vibroflotation method, the respective disadvantages are overcome, making the construction safety more guaranteed and the construction quality more controllable. Large-diameter long piles can be successfully constructed under poor geological conditions, and the construction quality of the sand pile is improved.

[0010] Optionally, the feeding device includes a limiting rod and a feeding bin. A rotating shaft is rotatably connected to the discharge port of the feeding bin. A first sealing door is arranged on the rotating shaft. A sliding channel is opened on the feeding bin. A reset rod is arranged in the sliding channel. The rotating shaft is connected to the reset rod. A support rod is arranged on the feeding bin. A rotating block is hinged to the support rod. A traction rope is connected to the rotating block. One end of the traction rope is connected to the reset rod. An abutting block is arranged on the frame body, and the abutting block is located above the feeding port of the feed pipe. When the rotating block and the support rod are simultaneously abutted against the abutting block, the first sealing door is placed on the feeding port of the feed pipe.

[0011] The limiting rods are arranged in pairs on the frame body, and a guide rod is connected to the bottom of the limiting rods. The distance between the two guide rods away from the limiting rods is greater than the distance between the two limiting rods. When the feeding bin approaches the feeding port of the feeding pipe, one end of the supporting rod is located between the two limiting rods.

[0012] By adopting the above technical solution, during the feeding process, the feeding bin filled with sand and gravel is lifted. As the feeding bin is continuously lifted, the supporting rod first enters between the two guide rods, and then one end of the supporting rod gradually enters between the two limiting rods along the guide rod, thereby realizing the positioning of the feeding bin and reducing the shaking of the feeding bin. When the rotating block abuts against the abutting block, the rotating block lifts the traction rope, and the traction rope drives the reset rod to rotate and turn upwards. The reset rod drives the rotating shaft to rotate, and the rotating shaft drives the first sealing door to open. When the supporting rod and the rotating block simultaneously abut against the abutting block, the first sealing door is completely opened and rests on the feeding port of the feeding pipe, and the sand and gravel are poured into the feeding pipe along the first sealing door, thereby realizing the feeding of the feeding pipe. The function of automatically opening the first sealing door for filling after the feeding bin and the feeding pipe are aligned reduces the situation of sand and gravel spilling outside the feeding pipe from the spilling place, and improves the accuracy of the filling amount each time.

[0013] When the feeding bin descends, the reset rod turns downwards along the sliding channel under the action of gravity and makes the rotating shaft drive the first sealing door to reset, realizing the automatic closing of the first sealing door.

[0014] Optionally, a movable channel is opened on the feeding bin, a sliding rod is slidably arranged in the movable channel, an adjusting groove is opened on the feeding bin, the adjusting groove is communicated with the movable channel and the discharging port of the feeding bin, a clamping block is arranged in the adjusting groove, the clamping block is arranged on the sliding rod, the sliding rod is connected with the traction rope, the clamping block abuts against the first sealing door, and the traction rope between the sliding rod and the rotating shaft is in a slack state.

[0015] By adopting the above technical solution, when the abutting block abuts against the rotating block, the rotating block lifts the traction rope to drive the sliding rod to move upwards. The sliding rod drives the clamping block to move upwards and releases the limit on the first sealing door. At this time, the traction rope between the sliding rod and the rotating shaft is in a straightened state. When the rotating block continues to rotate the rod, the traction rope drives the first sealing door to open. The restriction of the clamping block on the rotation of the first sealing door reduces the situation that the first sealing door is pushed open by sand and gravel during the lifting of the feeding bin, resulting in sand and gravel spilling, and realizes the function of automatically releasing the limit of the first sealing door when the feeding bin is ready to be filled.

[0016] Optionally, the guide pipe and the feed pipe are both provided with a plurality of sections, the guide pipes correspond to and are connected to the feed pipes one by one, the guide pipes and the feed pipes of adjacent sections are connected via flanges, and guide plates are provided at the flange connections of the guide pipes and the feed pipes;

[0017] An extension rod is provided on the frame, and two guide wheels are rotatably connected to the extension rod. The two guide wheels are tangent to each other, and a steel wire rope for lifting the upper silo passes between the two guide wheels;

[0018] The support rod is provided with a tension spring, one end of which is connected to the rotating block; the abutment block is provided with a spring, one end of which is fixed on the frame.

[0019] By adopting the above technical solution, the guide pipe and the feed pipe are connected in sections, which facilitates the disassembly and transportation of the guide pipe and the feed pipe. The support rod can smoothly pass through the connection between the guide pipe and the feed pipe along the guide plate, reducing the situation where the support rod is stuck on the flange plate, resulting in unsmooth transportation to the loading bin.

[0020] When lifting the upper bin with a wire rope, the guide wheel limits the wire rope, reducing the swing amplitude of the upper bin during lifting, thereby reducing the risk of collision between the upper bin and the guide pipe and the feed pipe;

[0021] When the rotating block abuts against the abutment block, the spring acts as a buffer, reducing the severe wear caused by the violent collision between the rotating block and the abutment block due to the too fast lifting of the upper bin, thereby improving the protection of the rotating block and the abutment block;

[0022] When the abutment block drives the rotating block to rotate, the reset spring is in a stretched state, and when the rotating block moves away from the abutment block, the reset spring returns to a natural state, thereby making it easier for the rotating block to be reset.

[0023] Optionally, the feeding device includes a hydraulic cylinder and a storage bin, the storage bin is arranged on the feed pipe and is connected to it, the frame is arranged on the storage bin and the feed pipe, the storage bin is provided with a second sealing door for closing its feed port, the hydraulic cylinder is arranged in the storage bin, a first connecting rod is hinged on the piston rod of the hydraulic cylinder, a second connecting rod is hinged on the first connecting rod, one end of the second connecting rod hinged to the hydraulic cylinder piston rod is also hinged to the storage bin, the second sealing door is arranged on the second connecting rod, a pressurizing pipe and a pressure relief valve are arranged on the storage bin, an exhaust pipe is also arranged on the storage bin, and the exhaust pipe is provided with a solenoid valve for opening and closing the exhaust pipe mouth.

[0024] By adopting the above technical solution, when the sand and gravel have been poured into the feed pipe, the hydraulic cylinder is started. The piston rod of the hydraulic cylinder drives the first connecting rod to rotate, the first connecting rod drives the second connecting rod to rotate, and the second connecting rod drives the second sealing door to close the feed port of the storage bin. Then, the feed pipe is lifted and high-pressure air is injected into the feed pipe through the pressure pipe. The pressure effect of the high-pressure air and the gravity of the sand and gravel itself push the sand and gravel to smoothly discharge into the discharge pipe and push the valve tip of the movable flap to fully open, so that the sand and gravel can smoothly enter the pile hole, reducing the situation where the valve tip of the movable flap cannot be smoothly opened due to the backlog of silt caused by the soft foundation hole formation, resulting in unsmooth filling;

[0025] When the high-pressure air in the feed pipe exceeds the specified value, the pressure relief valve automatically opens and closes to discharge some air, reducing the situation where the feed pipe is damaged due to excessive pressure in the feed pipe;

[0026] When recharging is required, the electromagnetic valve controls the exhaust pipe opening of the exhaust pipe to open, so that the air pressure inside and outside the feed pipe is balanced, and thus the second sealing door can be smoothly opened.

[0027] Optionally, a connecting plate is provided on the second connecting rod. The second sealing door is detachably connected to the connecting plate. The size of the connecting plate is smaller than that of the second sealing door. A first inspection port is provided on the storage bin, and a first inspection door for sealing the first inspection port is detachably connected to the storage bin.

[0028] By adopting the above technical solution, when maintenance is required, the second sealing door is disassembled. Since the size of the connecting plate is smaller than that of the sealing door, it is convenient for maintenance personnel to observe and maintain the inside of the storage bin;

[0029] When the hinge joints of the first connecting rod and the hydraulic cylinder piston and the hinge joints of the second sealing door and the storage bin fail to rotate, the maintenance personnel can directly open the inspection door, which is convenient for repairing the hinge joints of the first connecting rod and the hydraulic cylinder piston and the hinge joints of the second sealing door and the storage bin.

[0030] Optionally, a first water pipe and a second water pipe are provided in the guide pipe. A sandwich shell is provided on the vibrator. The sandwich shell is connected to the first shock absorber. The sandwich is provided with a water inlet channel communicating with the first water pipe and a water outlet channel communicating with the second water pipe. The sandwich shell is connected to the eccentric hammer.

[0031] By adopting the above technical solution, when the vibrator vibrates, cooling water is discharged into the first water pipe. The cooling water enters the interlayer shell after passing through the water inlet channel, and then, under high pressure, the cooling water sequentially passes through the water outlet channel and the second water pipe and is discharged into the guide pipe and then enters the circulation water tank for cooling, thereby realizing the protection of the vibrator. At the same time, the water outlet at the bottom of the traditional vibrator is removed to realize construction without high-pressure water, thereby reducing or not generating mud and promoting green environmental protection construction.

[0032] Optionally, a maintenance pipe is connected to the guide pipe. The maintenance pipe is detachably connected to the first shock absorber. A second maintenance opening is provided on the maintenance pipe. A second maintenance door for sealing the second maintenance opening is detachably connected to the maintenance pipe. Both the first water pipe and the second water pipe pass through the maintenance pipe.

[0033] By adopting the above technical solution, when the vibrator fails and needs to be replaced or repaired, the second maintenance door is opened, and the cable connected to the vibrator inside the maintenance pipe is removed. Subsequently, the first shock absorber, the vibrator, and the eccentric hammer are separated from the maintenance pipe together, thereby realizing the disassembly and replacement of the vibrator, avoiding the situation where the entire section of the guide pipe and the feed pipe need to be removed simultaneously and the wires inside the guide pipe need to be removed when the vibrator needs to be replaced or repaired, and improving the replacement and maintenance efficiency of the vibrator.

[0034] Optionally, a sealing plate is connected between the guide pipe and the feed pipe. A high-pressure air pipe and a high-pressure water pipe are provided on the sealing plate.

[0035] By adopting the above technical solution, when encountering harder soil during the hole-making process, high-pressure air is injected through the high-pressure air pipe, and high-pressure water is injected through the high-pressure water pipe. The high-pressure air and the high-pressure water cooperate with the vibrator to cut the soil, thereby making the hole-making smoother.

[0036] In a second aspect, the present application provides a vibroflotation pile-forming construction process adopting the following technical solution:

[0037] A vibroflotation pile-forming construction process includes the following steps: S1, positioning; S2, hole-making; S3, filling; S4, filling lifting; S5, reverse insertion and compaction; S6, pile-forming.

[0038] In step S2, the vibrator drives the guide pipe and the feed pipe to make holes simultaneously. In step S4, before lifting the guide pipe and the feed pipe, vibration and flotation should be carried out for at least 1 minute, and the pipe pulling speed is 1-2 m / minute. In step S5, when the guide pipe and the feed pipe are lifted by 1 m, reverse insertion of 30 cm is required and vibration is left for 10-20 seconds.

[0039] By adopting the above technical solution, the vibrator drives the guide pipe and the feeding pipe to form holes together. After the filler is lifted, reverse insertion and vibration compaction are carried out. The sand and gravel in the pile hole are compacted by the horizontal vibration of the vibrator, and at the same time, they can also be subjected to the squeezing and compaction effects of the sinking pipe during the reverse insertion process. By combining the two construction techniques of the traditional vibroflotation method and the sinking pipe method, the pile is successfully formed, and at the same time, the construction quality of the sand and gravel pile is improved.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. By pouring sand and gravel into the feeding pipe, the sand and gravel pass through the feeding pipe and the discharging pipe and are directly sent to the bottom of the pile hole, and gradually fill the pile hole with sand and gravel as the wire pipe and the feeding pipe are lifted. During the filling of the filler, reverse insertion and vibration compaction are carried out. By combining the process of the vibroflotation method and the sinking pipe method, the problems of silt back-silting and pile hugging at the orifice causing poor feeding in the vibroflotation method and the inability of the construction equipment to meet the construction requirements for large-diameter long piles in the sinking pipe method are overcome at the same time, and the advantages of both are combined to make the pile hole successfully formed and improve the quality of the sand and gravel pile;

[0042] 2. When the upper feeding bin is feeding, the rotating block pulls the traction rope to drive the clamping block to release the limit on the first sealing door, and then pulls the first sealing door open. When the abutting block abuts against both the rotating block and the support rod at the same time, the first sealing door is exactly aligned with the feeding port of the storage bin, so that the sand and gravel can be smoothly poured into the sinking pipe, reducing the situation of sand and gravel spilling during transportation and improving the accuracy of each feeding volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0044] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0045] Figure 3 is Figure 1 an enlarged schematic diagram of part B in

[0046] Figure 4 is a schematic diagram of the structure of the feeding device in an embodiment of the present application.

[0047] Figure 5 is Figure 4 an enlarged schematic diagram of part C in

[0048] Figure 6 is Figure 5 an enlarged schematic diagram of part D in

[0049] Figure 7 is a schematic diagram of the structure inside the maintenance pipe in an embodiment of the present application.

[0050] Figure 8 Yes Figure 7 It is an enlarged schematic diagram of part E in

[0051] Explanation of reference numerals in the drawings: 1. Guide pipe; 11. First shock absorber; 12. Vibrator; 13. Eccentric hammer; 14. Storage bin; 141. First inspection opening; 142. First inspection door; 15. First water pipe; 16. Second water pipe; 2. Feed pipe; 21. Second shock absorber; 22. Guide plate; 3. Discharge pipe; 31. Flap pile tip; 4. Sealing plate; 41. High-pressure air pipe; 42. High-pressure water pipe; 5. Frame; 51. Contact block; 52. Spring; 53. Limit rod; 54. Guide rod; 55. Extension rod; 56. Guide wheel; 6. Loading device; 61. Hydraulic cylinder; 62. Second sealing door; 63. First connecting rod; 64. Second connecting rod; 65. Connecting plate; 66. Pressurizing pipe; 67. Pressure relief valve; 68. Exhaust pipe; 69. Solenoid valve; 7. Feeding device; 71. Loading bin; 711. Second traction wheel; 712. Sliding channel; 713. Activity channel; 714. Adjusting groove; 73. Rotating shaft; 74. First sealing door; 75. Reset rod; 76. Support rod; 761. Tension spring; 762. First traction wheel; 77. Rotating block; 771. Traction rope; 78. Sliding rod; 79. Clamping block; 8. Inspection pipe; 81. Second inspection opening; 82. Second inspection door; 9. Interlayer shell; 91. Water inlet channel; 92. Water outlet channel. Specific implementation mode

[0052] The following will further elaborate on this application in conjunction with the Figure 1-7 accompanying drawings.

[0053] The embodiment of this application discloses a vibroflotation pile forming system combined with the immersed tube method.

[0054] As Figure 1 and Figure 2 , a vibroflotation pile forming system combined with the immersed tube method includes a guide pipe 1 and a feed pipe 2. A first shock absorber 11 is connected to the bottom of the guide pipe 1, a vibrator 12 is connected to the bottom of the first shock absorber 11, and an eccentric hammer 13 is connected to the bottom of the vibrator 12. The feed pipe 2 is arranged on one side of the guide pipe 1. A second shock absorber 21 is arranged at the bottom of the feed pipe 2, a discharge pipe 3 is arranged at the bottom of the second shock absorber 21, the discharge pipe 3 communicates with the second shock absorber 21, and one side of the vibrator 12 is fixed to the discharge pipe 3. A flap pile tip 31 for sealing the mouth of the discharge pipe 3 is hinged to the bottom of the discharge pipe 3. The feed pipe 2 and the guide pipe 1 are connected by a plurality of sealing plates 4. The plurality of sealing plates 4 are arranged in pairs on the feed pipe 2 and the guide pipe 1. A high-pressure air pipe 41 and a high-pressure water pipe 42 are commonly arranged on the plurality of sealing plates 4 on the same side of the feed pipe 2 and the guide pipe 1.

[0055] AsFigure 3 and Figure 4 At the top of the feed pipe 2, a storage bin 14 is provided. The storage bin 14 is communicated with the feed pipe 2. A frame body 5 is welded to both the storage bin 14 and the guide pipe 1. A feeding device 7 for pouring sand and gravel into the storage bin 14 is arranged on the frame body 5. A feeding device 6 for pushing the sand and gravel out of the feed pipe 2 is arranged in the storage bin 14.

[0056] When constructing the sand-gravel pile, the crane vertically suspends the frame body 5, aligns the eccentric hammer 13 with the pile position, and the vibrator 12 drives the eccentric hammer 13 and the feed pipe 2 to vibrate to form a hole. The crane lowers the frame body 5 so that the guide pipe 1 and the feed pipe 2 enter the pile hole. When encountering hard soil during the pile hole process, high-pressure air is conveyed into the pile hole through the high-pressure air pipe 41, and high-pressure water is conveyed into the pile hole through the high-pressure water pipe 42. The high-pressure air and high-pressure water cooperate with the eccentric hammer 13 to cut and vibrate the soil, so that the hole formation can proceed smoothly.

[0057] When the hole formation reaches the designed depth, the hoisting feeding device 7 pours the sand and gravel into the storage bin 14. The storage bin 14 discharges the sand and gravel to the feed pipe 2. When the feed pipe 2 is filled with 2 / 3 of the sand and gravel, the feeding is stopped and the feeding device 6 is started. At the same time, the frame body 5 is gradually lifted. The first shock absorber 11 reduces the vibration of the guide pipe 1 and the second shock absorber 21 reduces the vibration of the feed pipe 2, which is convenient for the removal of the guide pipe 1 and the feed pipe 2. The frame body 5 drives the eccentric hammer 13 and the discharge pipe 3 to lift. At this time, the valve pile tip 31 opens, and the feeding device 6 enables the sand and gravel to smoothly discharge from the discharge pipe 3 into the pile hole. Whenever the eccentric hammer 13 and the discharge pipe 3 are lifted to a certain height, the eccentric hammer 13 and the discharge pipe 3 are inserted into the sand and vibrated and compacted. At this time, the sand and gravel squeeze the valve pile tip 31 to seal the pipe orifice of the discharge pipe 3. By repeating the lifting and filling and the reverse insertion and vibration compaction, the construction of the sand-gravel pile is finally completed. Combining the vibroflotation method and the pipe sinking method can not only fill the sand and gravel from the bottom of the hole upwards, reducing the situation of unsmooth feeding caused by factors such as soil backlog and hole mouth pile holding during the pile driving of the traditional vibroflotation method in soft soil foundations, but also reduce the setting of super-large pile drivers during the construction of large-diameter long piles, strengthen the safety construction, and the reverse insertion and vibration expand and compact the sand and gravel, improving the construction quality of the sand-gravel pile.

[0058] such as Figure 1 and Figure 3, the feeding device 7 includes a loading bin 71 and a limiting rod 53. A rotating shaft 73 is rotatably connected at the discharge port of the loading bin 71. The rotating shaft 73 passes through both sides of the loading bin 71. A first sealing door 74 is fixed on the rotating shaft 73. A sliding channel 712 is formed at the bottom of the loading bin 71. The sliding channel 712 is opened along the width direction of the loading bin 71 and extends out from both sides of the loading bin 71. A reset rod 75 is inserted into the sliding channel 712. Both ends of the reset rod 75 extend out from both sides of the loading bin 71 respectively. Both sides of the reset rod 75 are connected to both ends of the rotating shaft 73 respectively. When the first sealing door 74 is closed, the reset rod 75 is located below the rotating shaft 73. When the first sealing door 74 is opened, the reset rod 75 is located above the rotating shaft 73.

[0059] Two support rods 76 are provided on the loading bin 71. The two support rods 76 are respectively arranged on both sides of the loading bin 71. A rotating block 77 is hinged on the support rod 76. A tension spring 761 is arranged on the support rod 76. One end of the tension spring 761 is connected to the rotating block 77. Two first traction wheels 762 are arranged at one end of the support rod 76 close to the loading bin 71. The two first traction wheels 762 are arranged along the length direction of the support rod 76. A second traction wheel 711 is arranged on the side surface of the loading bin 71. The second traction wheel 711 is close to the rotating shaft 73. A traction rope 771 is arranged on the rotating block 77. The traction rope 771 successively bypasses the first traction wheel 762 and the second traction wheel 711, and one end of the traction rope 771 away from the rotating block 77 is fixed at the bottom of the reset rod 75.

[0060] Such as Figure 1 And Figure 3 , abutting blocks 51 are arranged on both sides of the frame body 5. A spring 52 is arranged on the frame body 5. One end of the spring 52 is connected to the abutting block 51. The abutting block 51 is located above the discharge port of the storage bin 14. The abutting block 51 corresponds to and abuts against the rotating block 77 one by one. Every two limiting rods 53 are in a group. The two groups of limiting rods 53 are respectively arranged on each side of the frame body 5 and the two groups of limiting rods 53 are symmetrically distributed about the axis of the guiding tube 1. The bottom of the limiting rod 53 is connected to a guiding rod 54. The guiding rod 54 is arranged on the frame body 5. The distance between the ends of the paired guiding rods 54 away from the limiting rod 53 is greater than the distance between the two limiting rods 53, and the distance between the two guiding rods 54 gradually decreases towards the direction close to the limiting rod 53 until it is the same as the distance between the two limiting rods 53. One end of the support rod 76 away from the loading bin 71 is located between the two limiting rods 53. When the support rod 76 and the rotating block 77 abut against the abutting block 51 at the same time, at this time the first sealing door 74 is completely opened and rests on the discharge port of the storage bin 14.

[0061] During the feeding process, the crane lifts the loading bin 71 filled with sand and gravel to rise. When the loading bin 71 rises to the frame 5, the support rod 76 enters between the two limit rods 53. As the loading bin 71 continues to rise, the support rod 76 enters between the two limit rods 53 under the guidance of the guide rod 54. When the abutment block 51 abuts against the rotating block 77, the loading bin 71 continues to rise. At this time, the rotating block 77 rotates and pulls the traction rope 771, and the traction rope 771 pulls the reset rod 75 along the direction of the sliding channel 712. When the first sealing door 74 is fully opened, the feed port of the storage bin 14 is aligned with the discharge port of the loading bin 71, and the first sealing door 74 is placed on the feed port of the storage bin 14. Sand and gravel are poured into the storage bin 14 along the first sealing door 74. At the same time, the limit rod 53 restricts the loading bin 71 to reduce the shaking of the loading bin 71, thereby reducing the spillage of sand and gravel during filling, thereby improving the accuracy of the filling amount.

[0062] like Figure 5 and Figure 6 The upper bin 71 is provided with a movable channel 713, which is opened along the height direction of the upper bin 71, and the movable channel 713 passes through both sides of the upper bin 71. The movable channel 713 is located above the discharge port of the upper bin 71. A sliding rod 78 is passed through the movable channel 713, and both ends of the sliding rod 78 pass through both sides of the upper bin 71 respectively. Two traction ropes 771 are respectively connected to the two ends of the sliding rod 78. The traction rope 771 is divided into a first traction section and a second traction section. One end of the first traction section of the traction rope 771 is connected to the rotating block 77, and the other end is connected to the top of the sliding rod 78. One end of the second traction section of the traction rope 771 is connected to the bottom of the sliding rod 78, and the other end is connected to the bottom of the reset rod 75. An adjusting groove 714 is provided on the upper bin 71, and the adjusting groove 714 is located above the discharge port of the upper bin 71. The movable channel 713 and the discharge port are both connected to the adjusting groove 714. The height of the adjusting groove 714 is the same as that of the movable channel 713, and the length of the adjusting groove 714 is less than that of the movable channel 713. A clamping block 79 is provided in the adjusting groove 714, and the other end of the clamping block 79 is fixed to the sliding rod 78. When one end of the clamping block 79 extends from the adjusting groove 714 and abuts against the first sealing door 74, the second traction section of the traction rope 771 is in a relaxed state.

[0063] When the rotating block 77 rotates, the rotating block 77 drives the lifting of the first traction section of the traction rope 771. The first traction section of the traction rope 771 drives the sliding rod 78 to lift upward along the movable channel 713. The sliding rod 78 drives the clamping block 79 to lift upward along the adjustment groove 714. As the clamping block 79 moves away from the first sealing door 74, the second traction section of the traction rope 771 is straightened and pulls the reset rod 75 to flip upward, driving the first sealing door 74 to open, reducing the situation that the sand and gravel materials push open the first sealing door 74 during the rising process of the feeding bin 71, resulting in the spilling of sand and gravel materials, and realizing the automatic unlocking of the first sealing door 74 when preparing for filling.

[0064] Such as Figure 1 and Figure 4 As shown in FIGS. and, the guiding pipe 1 and the feeding pipe 2 are jointly divided into several connecting sections, and adjacent connecting sections are connected by flanges. Both the high-pressure water pipe 42 and the high-pressure air pipe 41 pass through the flange plate. The ends of the guiding pipe 1 and the feeding pipe 2 are both inclined with guiding plates 22, and one end of the guiding plate 22 is connected to the outer wall of the flange plate.

[0065] Two extension rods 55 are arranged on the frame body 5. Two guide wheels 56 are rotatably connected between the two extension rods 55. The two guide wheels 56 are tangent to each other, and the steel wire rope for lifting the feeding bin 71 passes between the two guide wheels 56.

[0066] When the feeding bin 71 rises, the steel wire rope is limited by the guide wheel 56, thereby reducing the shaking amplitude of the feeding bin 71. When the support rod 76 touches the flange plate during the rising process, the support rod 76 continues to rise along the guide plate 22, reducing the situation that the support rod 76 shakes and gets stuck at the bottom of the flange plate during rising, making the feeding bin 71 lift more smoothly, and the segmented guiding pipe 1 and feeding pipe 2 are convenient for disassembly and transportation.

[0067] Such as Figure 1 and Figure 5 As shown in FIGS. and, the feeding device 6 includes a hydraulic cylinder 61 and a second sealing door 62 for sealing the feeding port of the storage bin 14. The hydraulic cylinder 61 is arranged in the storage bin 14. A first connecting rod 63 is hinged to the piston rod of the hydraulic cylinder 61. One end of the first connecting rod 63 away from the piston rod is hinged to a second connecting rod 64. The end of the second connecting rod 64 hinged to the first connecting rod 63 is simultaneously hinged in the storage bin 14. A connecting plate 65 is fixedly connected to the second connecting rod 64. The second sealing door 62 is bolted to the connecting plate 65. The size of the connecting plate 65 is smaller than that of the second sealing door 62. A first inspection opening 141 is arranged on the storage bin 14. The first inspection opening 141 is opposite to the hinged joints of the first connecting rod 63 and the piston rod of the hydraulic cylinder 61 and the hinged joint of the first connecting rod 63 and the storage bin 14. A first inspection door 142 for sealing the first inspection opening 141 is detachably connected to the storage bin 14.

[0068] On one side of the storage bin 14, a pressure pipe 66 and a pressure relief valve 67 are provided. An exhaust pipe 68 is also provided on the storage bin 14. One end of the exhaust pipe 68 is located inside the storage bin 14, and the other end extends out from the top of the storage bin 14. A solenoid valve 69 for opening and closing the port of the exhaust pipe 68 is provided at one end of the exhaust pipe 68 extending out from the top of the storage bin 14.

[0069] When preparing to feed the storage bin 14, the piston cylinder of the hydraulic cylinder 61 retracts upward. The hydraulic cylinder 61 drives the first connecting rod 63 to rotate upward. The first connecting rod 63 drives the second connecting rod 64 to rotate upward. The second connecting rod 64 drives the connecting plate 65 to rotate. The connecting plate 65 drives the second sealing door 62 to open. Then, after filling the sand and gravel in the feeding bin 71 into the storage bin 14, the hydraulic cylinder 61 resets to close the second sealing door 62. Subsequently, sand and gravel are injected into the storage bin 14 through the pressure pipe 66, and the guiding pipe 1 and the feeding pipe 2 are lifted. High-pressure air pushes the sand and gravel to smoothly discharge from the feeding pipe 2 to the discharging pipe 3. Then, the squeezing valve tip 31 fully opens and is smoothly discharged into the pile hole, thereby reducing the situation that the squeezing valve tip 31 cannot fully open due to soil backlog, which affects the filling speed, and improving the filling efficiency.

[0070] As Figure 7 and Figure 8 , a first water pipe 15 and a second water pipe 16 are arranged inside the guiding pipe 1. The first shock absorber 11 and the guiding pipe 1 are connected through a maintenance pipe 8. A second maintenance opening 81 is formed on one side of the maintenance pipe 8. A second maintenance door 82 for sealing the second maintenance opening 81 is bolted to the maintenance pipe 8. The first water pipe 15 and the second water pipe 16 pass through the maintenance pipe 8. A sandwich shell 9 is arranged on the vibrator 12. The top of the sandwich shell 9 is bolted to the first shock absorber 11, and the bottom of the sandwich shell 9 is fixed to the eccentric hammer 13. The sandwich shell 9 is provided with a water inlet channel 91 and a water outlet channel 92 communicating with the cavity of the sandwich shell 9. The water inlet channel 91 is communicated with the first water pipe 15, and the water outlet channel 92 is communicated with the second water pipe 16.

[0071] When performing vibroflotation, the first water pipe 15 and the second water pipe 16 are connected to the cooling circulating water machine. Then, the cooling water flows into the sandwich shell 9 through the first water pipe 15, and then the cooling water is discharged from the second water pipe 16, thereby improving the protection of the vibrator 12 and reducing the situation of heat damage of the vibrator 12. At the same time, the water outlet of the traditional vibrator 12 is removed, realizing construction without high-pressure water, thereby reducing or not generating mud.

[0072] When the vibrator 12 is damaged, open the second maintenance door 82, remove the first water pipe 15 and the second water pipe 16 in the maintenance pipe 8, then cut off the wire connected to the vibrator 12 in the maintenance pipe 8, and then separate the first shock absorber 11 from the maintenance pipe 8, avoiding the situation that the entire guiding pipe 1 needs to be removed to separate the first shock absorber 11, which is convenient for replacing or maintaining the vibrator 12.

[0073] The implementation principle of the embodiment of this application is as follows: The crane vertically suspends the guiding pipe 1 and the feeding pipe 2. After aligning the eccentric hammer 13 with the pile position, the vibration hole forming starts. When the hole forming is completed, the hydraulic cylinder 61 is started. The hydraulic cylinder 61 lifts the first connecting rod 63, and the second connecting rod 64 drives the connecting plate 65 and the second sealing door 62 to open. Lift the feeding bin 71. The support rod 76 enters into the two limiting rods 53 along the two guiding rods 54, and the abutting block 51 abuts against the rotating block 77.

[0074] As the feeding bin 71 continues to rise, the rotating block 77 lifts the traction rope 771. The first traction section of the traction rope 771 drives the sliding rod 78 and the clamping block 79 to move upward, thus releasing the abutment of the clamping block 79 against the first sealing door 74. The second traction section of the traction rope 771 is straightened and lifts the reset rod 75 to rotate upward. The reset rod 75 drives the rotating shaft 73 to rotate, and the rotating shaft 73 drives the first sealing door 74 to open. When the support rod 76 contacts the abutting block 51, the first sealing door 74 is completely opened and obliquely placed on the feeding and discharging port of the storage bin 14. The sand and gravel material pours into the storage bin 14 along the first sealing door 74.

[0075] When the filling is completed, the second sealing door 62 is closed, and the guiding pipe 1 and the feeding pipe 2 are gradually lifted. Subsequently, high-pressure air is injected into the storage bin 14 through the pressure pipe 66. The high-pressure air pushes the sand and gravel material to smoothly discharge from the feeding pipe 2 to the discharging pipe 3, and squeezes the valve pile tip 31 to fully open, enabling the sand and gravel material to smoothly discharge into the pile hole. After filling a certain amount of sand and gravel material, the guiding pipe 1 and the feeding pipe 2 are inserted backward to vibrate and compact the sand and gravel material. By repeating the filling and inserting backward and vibrating and compacting, the construction of the sand pile is finally completed. This vibroflotation pile forming system combined with the pipe sinking method combines the pipe sinking and filling in the pipe sinking method with the vibroflotation hole forming in the vibroflotation method, facilitating the construction of large-diameter long piles, improving the construction quality of the sand pile, and making the construction of the sand pile safer.

[0076] The embodiment of this application also provides a vibroflotation pile forming construction process, including the following steps: S1, positioning; S2, hole forming; S3, filling; S4, lifting the filling material; S5, inserting backward and vibrating and compacting; S6, pile forming.

[0077] In step S1, the eccentric hammer 13 is aligned with the pile position hole.

[0078] In step S2, the vibrator 12 drives the eccentric hammer 13 to vibrate, and then the crane lowers the guiding pipe 1 and the feeding pipe 2. The guiding pipe 1 and the feeding pipe 2 drill into the soil layer to form a hole. When forming the hole, cooling water is injected into the first water pipe 15 to cool the vibrator 12.

[0079] In steps S3, S4 and S5, hoist the feeding bin 71, pour the sand and gravel in the feeding bin 71 into the storage bin 14, then slowly lift the guide pipe 1 and the feeding pipe 2, and then inject high-pressure air into the storage bin 14. The high-pressure air pours the sand and gravel into the pile hole. The pulling speed of the guide pipe 1 and the feeding pipe 2 is 1-2 m / min. For every 1 m of lifting of the guide pipe 1 and the feeding pipe 2, they need to be inserted back 30 cm to squeeze and vibrate the sand and gravel for compaction, and at the same time, vibrate for 10-20 seconds. By repeating steps S3-S5, the construction of the sand pile is finally completed.

[0080] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A vibroflotation pile forming system combined with the immersed tube method, comprising a guide pipe (1), and a first shock absorber (11), a vibrator (12) and an eccentric hammer (13) are sequentially connected to the bottom of the guide pipe (1). Characterized in that: A feed pipe (2) is arranged on the guide pipe (1), one end of the feed pipe (2) is connected to a second shock absorber (21) and is communicated with the second shock absorber (21), the second shock absorber (21) is communicated with a discharge pipe (3), the discharge pipe (3) is connected to the vibrator (12), a valve pile tip (31) is hinged to the discharge pipe (3), a frame body (5) is jointly arranged on the guide pipe (1) and the feed pipe (2), and a feeding device (7) for pouring sand and gravel into the feed pipe (2) is arranged on the frame body (5), and a feeding device (6) for discharging the sand and gravel in the feed pipe (2) into the discharge pipe (3) is arranged on the feed pipe (2); The feeding device (6) comprises a limiting rod (53) and a feeding bin (71), a rotating shaft (73) is rotatably connected to the discharge port of the feeding bin (71), a first sealing door (74) is arranged on the rotating shaft (73), a sliding channel (712) is formed in the feeding bin (71), a reset rod (75) is arranged in the sliding channel (712), the rotating shaft (73) is connected to the reset rod (75), a support rod (76) is arranged on the feeding bin (71), a rotating block (77) is hinged to the support rod (76), a traction rope (771) is connected to the rotating block (77), one end of the traction rope (771) is connected to the reset rod (75), a butting block (51) is arranged on the frame body (5), the butting block (51) is located above the feed port of the feed pipe (2), and when the rotating block (77) and the support rod (76) are simultaneously abutted against the butting block (51), the first sealing door (74) is placed on the feed port of the feed pipe (2); The limiting rods (53) are arranged in pairs on the frame body (5), a guide rod (54) is connected to the bottom of the limiting rod (53), and the distance between the two guide rods (54) far away from the limiting rod (53) is greater than the distance between the two limiting rods (53). When the feeding bin (71) approaches the feed port of the feed pipe (2), one end of the support rod (76) is located between the two limiting rods (53).

2. The vibroflotation pile forming system combined with the immersed tube method according to claim 1, Characterized in that: An activity channel (713) is formed in the feeding bin (71). A sliding rod (78) is slidably arranged in the activity channel (713). An adjustment groove (714) is formed in the feeding bin (71). The adjustment groove (714) communicates with the activity channel (713) and the discharge port of the feeding bin (71). A clamping block (79) is arranged in the adjustment groove (714). The clamping block (79) is arranged on the sliding rod (78). The clamping block (79) abuts against the first sealing door (74). The sliding rod (78) is connected to a towing rope (771). The towing rope (771) between the sliding rod (78) and the rotating shaft (73) is in a slack state.

3. A vibroflotation pile forming system combined with the immersed tube method according to any one of claims 1 or 2, characterized in that: A plurality of sections are provided for both the guide pipe (1) and the feed pipe (2). The guide pipe (1) corresponds to and is connected to the feed pipe (2) one by one. Adjacent sections of the guide pipe (1) and the feed pipe (2) are connected by a flange. Guide plates (22) are arranged at the flange joints of the guide pipe (1) and the feed pipe (2); An extension rod (55) is arranged on the frame body (5). Two guide wheels (56) are rotatably connected to the extension rod (55). The two guide wheels (56) are tangent to each other. The steel wire rope for hoisting the feeding bin (71) passes between the two guide wheels (56); A tension spring (761) is arranged on the support rod (76). One end of the tension spring (761) is connected to the rotating block (77). A spring (52) is arranged on the abutting block (51). One end of the spring (52) is fixed on the frame body (5).

4. A vibroflotation pile forming system combined with the immersed tube method according to claim 1, characterized in that: The feeding device (6) includes a hydraulic cylinder (61) and a storage bin (14). The storage bin (14) is arranged on the feed pipe (2) and is in communication therewith. The frame body (5) is arranged on the storage bin (14) and the feed pipe (2). A second sealing door (62) for closing the feed port of the storage bin (14) is arranged on the storage bin (14). The hydraulic cylinder (61) is arranged in the storage bin (14). A first connecting rod (63) is hinged to the piston rod of the hydraulic cylinder (61). A second connecting rod (64) is hinged to the first connecting rod (63). One end of the second connecting rod (64) hinged to the piston rod of the hydraulic cylinder (61) is simultaneously hinged to the storage bin (14). The second sealing door (62) is arranged on the second connecting rod (64). A pressure pipe (66) and a pressure relief valve (67) are arranged on the storage bin (14). An exhaust pipe (68) is further arranged on the storage bin (14). An electromagnetic valve (69) for opening and closing the orifice of the exhaust pipe (68) is arranged on the exhaust pipe (68).

5. A vibroflotation pile forming system combined with the immersed tube method according to claim 4, characterized in that: A connecting plate (65) is provided on the second connecting rod (64), the second sealing door (62) is detachably connected to the connecting plate (65), the size of the connecting plate (65) is smaller than that of the second sealing door (62), a first inspection opening (141) is provided on the storage bin (14), and a first inspection door (142) for sealing the first inspection opening (141) is detachably connected to the storage bin (14).

6. A vibroflotation pile forming system combined with the immersed tube method according to claim 1, characterized in that: A first water pipe (15) and a second water pipe (16) are arranged in the guide pipe (1), the vibrator (12) is provided with a sandwich shell (9), the sandwich shell (9) is connected to the first shock absorber (11), the sandwich shell (9) is provided with a water inlet channel (91) communicating with the first water pipe (15) and a water outlet channel (92) communicating with the second water pipe (16), and the sandwich shell (9) is connected to the eccentric hammer (13).

7. A vibroflotation pile forming system combined with the immersed tube method according to claim 6, characterized in that: An inspection pipe (8) is connected to the guide pipe (1), the inspection pipe (8) is detachably connected to the first shock absorber (11), a second inspection opening (81) is provided on the inspection pipe (8), a second inspection door (82) for sealing the second inspection opening (81) is detachably connected to the inspection pipe (8), and both the first water pipe (15) and the second water pipe (16) pass through the inspection pipe (8).

8. A vibroflotation pile forming system combined with the immersed tube method according to claim 6, characterized in that: A sealing plate (4) is connected between the guide pipe (1) and the feed pipe (2), and a high-pressure air pipe (41) and a high-pressure water pipe (42) are provided on the sealing plate (4).

9. A vibroflotation pile forming construction process using a vibroflotation pile forming system combined with the immersed tube method according to any one of claims 1-8, characterized in that: comprises the following steps: S1, positioning; S2, hole making; S3, filling; S4, filling lifting; S5, reverse insertion and vibration compaction; S6, pile forming; In step S2, the vibrator (12) drives the guide pipe (1) and the feed pipe (2) to make holes simultaneously. In step S4, before lifting the guide pipe (1) and the feed pipe (2), vibration flotation shall be carried out for not less than 1 minute. When lifting the guide pipe (1) and the feed pipe (2), the pipe pulling speed is 1-2 m / min. In step S5, when the guide pipe (1) and the feed pipe (2) are lifted by 1 m, reverse insertion shall be carried out by 30 cm and vibration shall be maintained for 10-20 seconds.

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