Construction equipment and construction method of multi-point vibration micro compaction pile

Abstract

The invention relates to construction equipment for a multi-point vibration micro compaction pile. The construction equipment comprises a hopper, a main body pipe and a valve pile shoe, the top of the main body pipe is connected with a vibration mechanism used for driving the pile pipes to vibrate, the structure is lifted to a specific height through a hoisting rope of hoisting equipment, the vibration mechanism is driven to start to work, the vibration mechanism drives the three pile pipes to start high-frequency vibration work, or a backhoe excavator cantilever is clamped by a vibrator to lift the structure to the specific height. The vibrator works to drive the three pile pipes to start high-frequency vibration work, at the moment, a plurality of valve plates of the valve pile shoe are in a combined state, under high-frequency vibration, the conical shell squeezes soil to form holes, the three pile pipes slowly move downwards till three pile holes are formed, mixed aggregate enters the three discharging pipes through the feeding pipes, and then the three pile pipes are driven to work. Aggregate enters the three pile pipes, the equipment is slowly lifted, the aggregate is discharged from the valve pile shoe, and vibration and lifting are carried out at the same time until the aggregate is lifted to the designed elevation of the pile top.

Description

Technical Field

[0001] The invention relates to the technical field of compaction piles, and in particular to construction equipment and a construction method for multi-point vibration micro compaction piles. Background Art

[0002] Multi-point micro compaction piles are suitable for some soft soil foundations with low bearing capacity, such as silty soil, silty clay, etc. Multi-point micro compaction piles can effectively improve the bearing capacity of the foundation. For example, when constructing small buildings on soft soil foundations in some coastal areas, this technology can improve the foundation conditions so that it can withstand the load of the building. Among them, the construction equipment of multi-point compaction piles will be used in the construction of multi-point compaction piles. Please refer to the patent publication number: CN208996038U-China Utility Model Patent A Micro Compacting Pile Forming Device. However, in the existing micro compaction pile forming device, three pile pipes are arranged in a line. The pile pipes arranged in a line will result in uneven compaction effect. Since the spacing between the pile pipes is fixed and the arrangement is single, the soil in some areas may be over-compacted, while other areas may not be compacted enough. Summary of the invention

[0003] The main purpose of the present invention is to provide a multi-point vibration micro compaction pile construction device to solve the problem that the pile pipes arranged in a straight line in the existing micro compaction pile forming device may cause uneven compaction effect.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a construction device for a multi-point vibration micro compaction pile, comprising a hopper, a main body pipe and a flap pile shoe; Three pile pipes are fixedly connected at the bottom of the hopper, and the three pile pipes are arranged in a regular triangle. One end of each pile pipe away from the hopper is connected to a flap pile shoe. The bottom end of the main body pipe is fixedly connected to the inner bottom wall of the hopper, and the top is connected to a vibration mechanism for driving the pile pipe to vibrate. The middle and upper part of the main body pipe is obliquely connected to a feed pipe, and three discharge pipes are obliquely arranged in a circle at the middle and lower part. The three discharge pipes correspond to the three pile pipes one by one and are located in the hopper, and the discharge ports of the discharge pipes face the feed ports of the pile pipes.

[0005] A preferred solution is that the diameter of the pile pipe is 0.3m-0.5m, and the distance between two adjacent pile pipes is 1.1m-0.9m.

[0006] A preferred solution is that a plurality of connecting rods are arranged on the circumference of the outer ring wall of the main body pipe, and each connecting rod is fixedly connected to the hopper at one end away from the main body pipe.

[0007] A preferred solution is that the flap pile shoe comprises a vertical tube and a plurality of flap plates, the top end of the vertical tube is coaxially connected to the pile tube, the top wall of each flap plate is hingedly connected to the vertical tube through a hinged group rod, and when the plurality of flap plates are in a closed state, the plurality of flap plates form a conical shell; A mounting ring is coaxially arranged in the vertical tube, the mounting ring is fixedly arranged in the vertical tube through a bracket, and a telescopic rod is slidably arranged in the inner ring, a limiting ring is fixedly sleeved on the telescopic rod, a compression spring is sleeved on the telescopic rod, and two ends of the compression spring are respectively against the limiting ring and the mounting ring; The top end of the telescopic rod is coaxially connected to the pressing plate, and the limiting ring is located between the pressing plate and the mounting ring; The bottom end of the telescopic rod is coaxially connected to the chassis. A plurality of hinged rods are hingedly arranged on the circumference of the chassis. One end of the hinged rod away from the chassis is hingedly connected to the flap plate, and the plurality of flap plates correspond to the plurality of hinged rods one by one.

[0008] A preferred solution is that the hinged rod assembly includes a horizontal plate and a bent plate, one end of the horizontal plate is fixedly connected to the inner wall of the vertical tube, and the other end is provided with a receiving groove; One end of the bending plate is fixedly connected to the flap plate, and the other end is fixedly connected to the receiving plate, and the receiving plate is rotatably arranged on the receiving groove through a rotating shaft.

[0009] A preferred solution is that the flap pile shoe further comprises a cylinder, the opening end of the cylinder is fixedly arranged on the mounting ring, and the two are coaxially arranged; A through hole is arranged on the bottom wall of the cylinder, the telescopic rod passes through the through hole, and the compression spring and the limiting ring are both inside the cylinder.

[0010] A preferred solution is that the valve pile shoe also includes a shielding ring, the outer ring of which is coaxially fixed in the vertical tube, and the shielding ring is inclined and located directly above the plurality of hinged rod groups.

[0011] A preferred solution is that an internal thread is provided on the circumference of the inner wall of the vertical pipe, and an external thread is provided on the circumference of the outer ring wall at the bottom end of the pile pipe, and the internal thread is threadedly connected with the external thread.

[0012] A construction method for a multi-point vibration micro compaction pile construction device, comprising the following steps: S1: Level the site, clean the surface cultivated soil, level the site with a grader, and compact it with a roller; S2: Measure the marking pile positions, where three marking pile positions form a measurement unit. According to the construction requirements, multiple measurement units are marked in a matrix arrangement, and the distance between each adjacent marking pile position is 1m; S3: The top of the main pipe is connected to a vibration mechanism for driving the pile pipe to vibrate. The structure is lifted to a specific height by a lifting rope of the lifting equipment, and the vibration mechanism is driven to start working. The vibration mechanism drives the three pile pipes to start high-frequency vibration. Alternatively, the backhoe excavator cantilever is clamped by a vibrator to lift the structure to a specific height. The vibrator drives the three pile pipes to start high-frequency vibration. The present invention can select one of the two lifting and vibration modes. At this time, the multiple flap plates of the flap pile shoe are in a merged state, the multiple flap plates form a conical shell, and the compression spring is in a free state; S4: The three pile pipes correspond to the three marked pile positions of a measurement unit one by one. The cone shell is inserted on the marked pile position under vibration. The cone shell squeezes the soil to form a hole under high-frequency vibration. The three pile pipes move slowly downward until three pile holes are formed. S5: The mixed aggregate enters the three discharge pipes through the feed pipe, the discharge port of the discharge pipe faces the feed port of the pile pipe, the aggregate enters the three pile pipes, the equipment is slowly lifted, the aggregate falls onto the pressing plate, the pressing plate moves downward, the telescopic rod starts to move downward, the compression spring is suppressed by the limit ring, the chassis drives multiple flap plates to be propped up through the hinged rod, so that the flap pile shoe is relatively open, the aggregate is released from the flap pile shoe, and it is lifted while vibrating until it reaches the designed elevation of the pile top; S6: Repeat the above steps to complete the compaction and piling work of multiple measurement units; S7: Leveling the site, leveling the site by a grader and compacting it by a roller; S8: Lay the graded crushed stone cushion layer.

[0013] The beneficial effects of the above scheme are: The top of the main pipe is connected to a vibration mechanism for driving the pile pipe to vibrate. The structure is lifted to a specific height by the lifting rope of the lifting equipment, and the vibration mechanism is driven to start working. The vibration mechanism drives the three pile pipes to start high-frequency vibration, or the backhoe excavator cantilever clamps the structure to a specific height through the vibrator, and the vibrator drives the three pile pipes to start high-frequency vibration. The present invention can choose one of the two lifting and vibration methods. At this time, the multiple valve plates of the valve pile shoe are in a merged state. The conical shell squeezes the soil to form a hole under high-frequency vibration. The three pile pipes slowly move downward until three pile holes are formed, and the mixed aggregate enters the three discharge pipes through the feed pipe. The discharge port of the discharge pipe faces the feed port of the pile pipe. The aggregate enters the three pile pipes, and the equipment is slowly lifted. The aggregate is released from the valve pile shoe, and it is lifted while vibrating until it reaches the designed elevation of the pile top.

[0014] Among them, the pile pipes are arranged in an equilateral triangle, and the compaction effect on the foundation soil is more uniform on the plane. In the straight arrangement, the compaction degree of the middle pile pipe and the edge pile pipe on the soil is quite different, while the equilateral triangle arrangement allows the soil around each pile pipe to be subjected to a more balanced extrusion force. The pile pipes in the equilateral triangle layout can form a continuous and uniform reinforcement range in the plane in the compaction area. During the vibration compaction process of the pile pipes arranged in the equilateral triangle, the extrusion force on the sand in all directions is similar, which can form a more uniform dense structure. The straight arrangement may result in insufficient compaction of the sand at the edge and excessive compaction in the middle, causing differences in the properties of the foundation soil on the plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a schematic diagram of a structure in which a plurality of measurement units are arranged in a matrix; Figure 2 It is a three-dimensional structural schematic diagram of the construction equipment of the multi-point vibration micro compaction pile of the present invention; Figure 3 yes Figure 2 Another perspective structural diagram of; Figure 4 It is a schematic diagram of the three-dimensional structure of the cross-section state of the construction equipment of the multi-point vibration micro compaction pile of the present invention; Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of the A area in the middle; Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of the middle B area; Figure 7 It is a three-dimensional structural schematic diagram of the cross-sectional state of the construction equipment of the multi-point vibration micro compaction pile of the present invention from another perspective.

[0017] Description of Reference Numerals 1. Hopper; 2. Pile pipe; 21. External thread; 3. flap pile shoe; 31. vertical tube; 310. internal thread; 32. flap plate; 33. hinged rod assembly; 330. horizontal plate; 331. bending plate; 3301. receiving groove; 332. receiving plate; 333. rotating shaft; 34. mounting ring; 35. bracket; 36. telescopic rod; 37. limiting ring; 38. compression spring; 39. pressing plate; 300. chassis; 301. hinged rod; 302. cylinder; 3020. perforation; 303. shielding ring; 4. Feed pipe; 5. Discharge pipe; 6. Connecting rod; 7. Main pipe; 100. Measurement unit; 200. Identify the pile location. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0019] First embodiment: like Figure 2-Figure 7 As shown, this embodiment provides a construction device for a multi-point vibration micro compaction pile, including a hopper 1, a main body pipe 7 and a valve pile shoe 3. Figure 3 As shown, three pile pipes 2 are fixedly connected to the bottom of the hopper 1, and the three pile pipes 2 are arranged in an equilateral triangle. The end of each pile pipe 2 away from the hopper 1 is connected to a valve pile shoe 3. The bottom end of the main pipe 7 is fixedly connected to the inner bottom wall of the hopper 1, and the top of the main pipe 7 is connected to a vibration mechanism (not shown) for driving the pile pipe 2 to vibrate. The vibration mechanism adopts the existing technology and will not be described in detail. Figure 2As shown, the middle and upper part of the main pipe 7 is connected to the feed pipe 4, and the middle and lower part of the main pipe 7 is arranged in an inclined circle with three discharge pipes 5. The three discharge pipes 5 correspond to the three pile pipes 2 one by one, and the three discharge pipes 5 are all located in the hopper 1, and the discharge port of the discharge pipe 5 faces the feed port of the pile pipe 2. The top of the main pipe 7 is connected to a vibration mechanism for driving the pile pipe 2 to vibrate. The structure is lifted to a specific height by a lifting rope of a lifting device (not shown), and the vibration mechanism is driven to start working. The vibration mechanism drives the three pile pipes 2 to start high-frequency vibration work, or the backhoe excavator cantilever clamps the structure to a specific height through a vibrator, and the vibrator drives the three pile pipes to start high-frequency vibration work. The present invention can select one of the two lifting and vibration modes. At this time, the multiple flap plates 32 of the flap pile shoe 3 are in a merged state, and the conical shell squeezes the soil to form a hole under high-frequency vibration. The three pile pipes 2 slowly move downward until three pile holes are formed, and the mixed aggregate enters the three discharge pipes 5 through the feed pipe 4. The discharge port of the discharge pipe 5 faces the feed port of the pile pipe 2, and the aggregate enters the three pile pipes 2. The equipment is slowly lifted, and the aggregate is released from the flap pile shoe 3, while vibrating and lifting until it reaches the designed elevation of the pile top. Among them, the pile pipe 2 is arranged in an equilateral triangle, and the compaction effect on the foundation soil is more uniform on the plane. In the straight arrangement, the compaction degree of the middle pile pipe 2 and the edge pile pipe 2 on the soil body is quite different, and the equilateral triangle arrangement allows the soil around each pile pipe 2 to be subjected to a more balanced extrusion force. The pile pipe 2 in the equilateral triangle layout can form a continuous and uniform reinforcement range in the plane in the compaction area. During the vibration compaction process of the pile pipe 2 arranged in the equilateral triangle, the extrusion force on the sand in all directions is similar, which can form a more uniform dense structure. The straight arrangement may result in insufficient compaction of the sand in the edge part and excessive compaction in the middle part, causing differences in the properties of the foundation soil on the plane.

[0020] Second embodiment: The diameter of the pile pipe 2 is 0.3m-0.5m, and the distance between two adjacent pile pipes 2 is 1.1m-0.9m. A plurality of connecting rods 6 are arranged on the circumference of the outer ring wall of the main pipe 7, and one end of each connecting rod 6 away from the main pipe 7 is fixedly connected to the hopper 1. Figure 5-Figure 7As shown, the flap pile shoe 3 includes a vertical tube 31 and a plurality of flap plates 32. The top end of the vertical tube 31 is coaxially connected to the pile tube 2. The top wall of each flap plate 32 is hinged to the vertical tube 31 through a hinged rod 33. When the plurality of flap plates 32 are in a closed state, the plurality of flap plates 32 form a conical shell. A mounting ring 34 is coaxially arranged in the vertical tube 31. The mounting ring 34 is fixedly arranged in the vertical tube 31 through a bracket 35. A telescopic rod 36 is slidably arranged in the inner ring of the mounting ring 34. A limit ring 37 is fixedly sleeved on the telescopic rod 36. A compression spring 38 is sleeved on the telescopic rod 36. The two ends of the compression spring 38 are respectively against the limit ring 37 and the mounting ring 34. The top end of the telescopic rod 36 is coaxially connected to the pressing plate 39. The limit ring 37 is located between the pressing plate 39 and the mounting ring 34. The bottom end of the telescopic rod 36 is coaxially connected to the chassis 300. The chassis 300 is hinged with a plurality of hinged rods 301. The end of the hinged rod 301 away from the chassis 300 is hinged with the flap plate 32. The plurality of flap plates 32 correspond to the plurality of hinged rods 301 one by one. Figure 6 The hinged rod assembly 33 shown includes a horizontal plate 330 and a bent plate 331, one end of the horizontal plate 330 is fixedly connected to the inner wall of the vertical tube 31, and the other end of the horizontal plate 330 is provided with a receiving groove 3301. One end of the bent plate 331 is fixedly connected to the flap plate 32, and the other end of the bent plate 331 is fixedly connected to the receiving plate 332, and the receiving plate 332 is rotatably arranged on the receiving groove 3301 through a rotating shaft 333. The flap pile shoe 3 also includes a cylinder 302, the open end of the cylinder 302 is fixedly arranged on the mounting ring 34, and the two are coaxially arranged. The bottom wall of the cylinder 302 is provided with a through hole 3020, and the telescopic rod 36 is arranged through the through hole 3020, and the compression spring 38 and the limit ring 37 are both in the cylinder 302. The cylinder 302 protects the compression spring 38 from working properly and prevents the compression spring 38 from being interfered with when the aggregate is discharged. The flap pile shoe 3 also includes a shielding ring 303, the outer ring of which is coaxially fixed in the vertical tube 31, and the shielding ring 303 is tilted and located directly above the plurality of hinged rods 33. The inner wall circumference of the vertical tube 31 is provided with an internal thread 310, and the outer ring wall circumference of the bottom end of the pile pipe 2 is provided with an external thread 21, and the internal thread 310 is screwed with the external thread 21. The shielding ring 303 can effectively protect the hinged rod 33 and prevent interference with the hinged rod 33 when the aggregate is discharged.

[0021] like Figure 1-Figure 7 As shown, a construction method of a multi-point vibration micro compaction pile construction equipment, the steps are: S1: Level the site, clean the surface cultivated soil, level the site with a grader, and compact it with a roller; S2: measuring the marking pile sites 200, wherein three marking pile sites 200 constitute one measuring unit 100. According to the construction requirements, a plurality of measuring units 100 are marked in a matrix arrangement, and the distance between each adjacent marking pile site 200 is 1 m; S3: The top of the main body tube 7 is connected to a vibration mechanism for driving the pile pipe 2 to vibrate. The structure is lifted to a specific height by the lifting rope of the lifting equipment, and the vibration mechanism is driven to start working. The vibration mechanism drives the three pile pipes 2 to start high-frequency vibration. Alternatively, the backhoe excavator cantilever clamps the structure to a specific height through the vibrator, and the vibrator drives the three pile pipes to start high-frequency vibration. The present invention can select one of the two lifting and vibration modes. At this time, the multiple flap plates 32 of the flap pile shoe 3 are in a combined state, the multiple flap plates 32 form a conical shell, and the compression spring 38 is in a free state; S4: The three pile pipes 2 correspond to the three marked pile positions 200 of a measuring unit 100 one by one, the conical shell is inserted on the marked pile position 200 under the vibration state, the conical shell squeezes the soil to form a hole under high-frequency vibration, and the three pile pipes 2 slowly move downward until three pile holes are formed; S5: The mixed aggregate is passed through the feed pipe 4 into the three discharge pipes 5, the discharge port of the discharge pipe 5 is toward the feed port of the pile pipe 2, the aggregate enters the three pile pipes 2, the equipment is slowly lifted, the aggregate falls onto the pressing plate 39, the pressing plate 39 moves downward, the telescopic rod 36 starts to move downward, the compression spring 38 is suppressed by the limit ring 37, the chassis 300 drives the multiple flap plates 32 to prop up through the hinged rod 301, so that the flap pile shoe 3 is relatively open, the aggregate is released from the flap pile shoe 3, and it is lifted while vibrating until it reaches the designed elevation of the pile top; S6: Repeat the above steps to complete the compaction and piling work of multiple measurement units 100; S7: Leveling the site, leveling the site by a grader and compacting it by a roller; S8: Lay the graded crushed stone cushion layer.

[0022] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A construction equipment for multi-point vibration micro compaction piles, characterized in that: include: A hopper, wherein three pile pipes are fixedly connected at the bottom of the hopper, the three pile pipes are arranged in an equilateral triangle, and a valve pile shoe is connected at one end of each pile pipe away from the hopper; A main body pipe, the bottom end of which is fixedly connected to the inner bottom wall of the hopper, and the top is connected to a vibration mechanism for driving the pile pipe to vibrate, a feed pipe is obliquely connected to the middle and upper part of the main body pipe, and three discharge pipes are obliquely arranged in a circle at the middle and lower part; The three discharge pipes correspond to the three pile pipes one by one and are located in the hopper, and the discharge ports of the discharge pipes face the feed ports of the pile pipes.

2. The construction equipment of multi-point vibration micro compaction pile according to claim 1, characterized in that: The diameter of the pile pipe is 0.3m-0.5m, and the distance between two adjacent pile pipes is 1.1m-0.9m.

3. The construction equipment of multi-point vibration micro compaction pile according to claim 1, characterized in that: A plurality of connecting rods are arranged on the circumference of the outer ring wall of the main body tube, and one end of each connecting rod away from the main body tube is fixedly connected to the hopper.

4. The construction equipment for multi-point vibration micro compaction piles according to any one of claims 1 to 3, characterized in that: The flap pile shoe comprises a vertical tube and a plurality of flap plates, the top end of the vertical tube is coaxially connected with the pile tube, the top wall of each flap plate is hingedly connected with the vertical tube through a hinged group rod, and when the plurality of flap plates are in a closed state, the plurality of flap plates form a conical shell; A mounting ring is coaxially arranged in the vertical tube, the mounting ring is fixedly arranged in the vertical tube through a bracket, and a telescopic rod is slidably arranged in the inner ring, a limiting ring is fixedly sleeved on the telescopic rod, a compression spring is sleeved on the telescopic rod, and two ends of the compression spring are respectively against the limiting ring and the mounting ring; The top end of the telescopic rod is coaxially connected to the pressing plate, and the limiting ring is located between the pressing plate and the mounting ring; The bottom end of the telescopic rod is coaxially connected to the chassis, and a plurality of hinged rods are hingedly arranged on the circumference of the chassis. One end of the hinged rod away from the chassis is hinged to the flap plate, and the plurality of flap plates correspond one to one to the plurality of hinged rods.

5. The construction equipment of multi-point vibration micro compaction pile according to claim 4, characterized in that: The hinged rod assembly includes a horizontal plate and a bent plate, one end of the horizontal plate is fixedly connected to the inner wall of the vertical tube, and the other end is provided with a receiving groove; One end of the bending plate is fixedly connected to the flap plate, and the other end is fixedly connected to a receiving plate, and the receiving plate is rotatably arranged on the accommodating groove via a rotating shaft.

6. The construction equipment for multi-point vibration micro compaction piles according to claim 4, characterized in that: The valve pile shoe also includes a cylinder, the opening end of which is fixedly arranged on the mounting ring, and the two are coaxially arranged; A through hole is formed on the bottom wall of the cylinder, the telescopic rod is arranged through the through hole, and the compression spring and the limiting ring are both located in the cylinder.

7. The construction equipment for multi-point vibration micro compaction piles according to claim 4, characterized in that: The valve pile shoe also includes a shielding ring, the outer ring of which is coaxially fixed in the vertical tube, and the shielding ring is tilted and located directly above the plurality of hinged rods.

8. The construction equipment for multi-point vibration micro compaction piles according to claim 4, characterized in that: The inner wall circumference of the vertical pipe is provided with an internal thread, the outer ring wall circumference of the bottom end of the pile pipe is provided with an external thread, and the internal thread is threadedly connected with the external thread.

9. A construction method for a multi-point vibration micro compaction pile construction equipment, characterized in that: The construction equipment of the multi-point vibration micro compaction pile according to any one of claims 1 to 8 is used, and the construction steps are as follows: S1: Level the site, clean the surface cultivated soil, level the site with a grader, and compact it with a roller; S2: Measure the marking pile positions, where three marking pile positions form a measurement unit. According to the construction requirements, multiple measurement units are marked in a matrix arrangement, and the distance between each adjacent marking pile position is 1m; S3: The top of the main pipe is connected to a vibration mechanism for driving the pile pipe to vibrate. The structure is lifted to a specific height by a lifting rope of the lifting equipment, and the vibration mechanism is driven to start working. The vibration mechanism drives the three pile pipes to start high-frequency vibration. Alternatively, the backhoe excavator cantilever is clamped by a vibrator to lift the structure to a specific height. The vibrator drives the three pile pipes to start high-frequency vibration. The present invention can select one of the two lifting and vibration modes. At this time, the multiple flap plates of the flap pile shoe are in a merged state, the multiple flap plates form a conical shell, and the compression spring is in a free state; S4: The three pile pipes correspond to the three marked pile positions of a measurement unit one by one. The cone shell is inserted on the marked pile position under vibration. The cone shell squeezes the soil to form a hole under high-frequency vibration. The three pile pipes move slowly downward until three pile holes are formed. S5: The mixed aggregate is passed through the feed pipe into the three discharge pipes, the discharge port of the discharge pipe faces the feed port of the pile pipe, the aggregate enters the three pile pipes, the equipment is slowly lifted, the aggregate falls onto the pressing plate, the pressing plate moves downward, the telescopic rod starts to move downward, the compression spring is suppressed by the limit ring, the chassis drives multiple flap plates to be propped up through the hinged rod, so that the flap pile shoe is relatively open, the aggregate is released from the flap pile shoe, and the equipment is lifted while vibrating until it reaches the designed elevation of the pile top; S6: Repeat the above steps to complete the compaction and piling work of multiple measurement units; S7: Leveling the site by using a grader and compacting the site by using a roller; S8: Lay the gravel cushion layer.

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