A construction method for pile driving using a vibratory pipe pile driver

Abstract

This invention relates to a construction method for driving piles using a vibratory driven pile unit. The original walking pile frame is replaced with a crawler crane. Utilizing the flexible movement of the crawler crane, the machine can move immediately after driving one pile to drive the next. At this time, crushed stone can be added to the previous pile, and then the pile can be extracted. This back-and-forth operation greatly improves construction efficiency. The crawler crane is equipped with an adjustment frame, which is fixed at the bottom by a bottom-fixing cylinder. The mast adjusts the upper position of the pile frame, and the adjustment frame adjusts the lower position of the pile frame, ensuring the verticality of the crushed stone piles during driving and extraction. During use, the mast adjusts the position of the pile frame, and the vibratory lifting mechanism drives the hoisting rope to move the vibratory hammer up and down through the slide frame for driving or extracting piles.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery, and in particular to a construction method for driving piles using a vibratory pipe pile driver. Background Technology

[0002] Currently, infrastructure construction projects are becoming increasingly large-scale, and the requirements for foundation treatment are also becoming more stringent. In particular, when constructing various buildings on poor foundations, it is necessary to improve the poor foundations according to different geological conditions in order to meet the requirements for constructing various buildings on this basis. Foundation treatment engineering is playing an increasingly important role in the engineering construction industry.

[0003] In soft soil foundation treatment projects, the vibratory driven stone pile method is increasingly widely used. This method involves setting up vertical reinforcements composed of crushed stone in soft soil foundations to form a composite foundation, achieving the purpose of foundation treatment. The crushed stone pile composite foundation can improve the bearing capacity of the natural foundation and reduce settlement. Furthermore, the crushed stone piles have excellent permeability, which facilitates the dissipation of excess pore water pressure, and the composite foundation also exhibits good resistance to liquefaction. In recent years, vibratory stone piles have been increasingly widely used and promoted in soft soil treatment projects such as ports, wharves, artificial islands, and reclamation projects.

[0004] The development of soft soil foundation treatment technology has placed increasingly higher demands on the construction equipment to match it. Traditional conventional vibratory compaction stone pile construction equipment does not have a fixed pile driver. Therefore, when constructing large-diameter stone piles, due to the weight of the pipe piles and the equipment, a walking pile frame is usually used to suspend the vibratory equipment. The biggest drawbacks of this construction method are: 1. The walking pile driver moves slowly, has a long waiting time, and is inefficient. It must complete one pile before moving to the next, resulting in low overall construction efficiency; 2. The verticality of the vibratory equipment to the ground cannot be maintained stably during pile driving, which reduces the bearing capacity of the soft soil foundation; 3. When filling and compacting the existing stone piles, slow filling and poor stone discharge can lead to stone loss, reducing the bearing capacity of the soft soil foundation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a construction method for pile driving using a vibratory pipe pile unit, which addresses the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vibratory driven pile driver unit, characterized in that it includes a crawler crane, a pile frame mounted on the mast of the crawler crane, a vibratory hammer, a vibratory lifting mechanism, and a crushed stone pile. The vibratory hammer is movably mounted on the pile frame via a sliding frame. The vibratory lifting mechanism is mounted on the pile frame and moves up and down along the pile frame by a hoisting rope. The crawler crane is provided with an adjusting frame and a bottom fixing cylinder mounted on the adjusting frame at one end near the bottom of the pile frame. The adjusting frame is used to adjust the distance between the bottom of the pile frame and the crawler crane, and the adjusting frame is fixed by the bottom fixing cylinder.

[0007] By adopting the above technical solution, the original walking pile frame is transformed into a crawler crane. Utilizing the flexible mobility of the crawler crane, it can move to drive the next pile immediately after the previous one has been driven. At this time, crushed stone can be added to the previous pile, and then the pile can be extracted. This back-and-forth operation greatly improves construction efficiency. The crawler crane is equipped with an adjustment frame, which is fixed at the bottom by a bottom-fixing hydraulic cylinder. The mast adjusts the upper position of the pile frame, and the adjustment frame adjusts the lower position of the pile frame to ensure the verticality of the crushed stone piles during driving and extraction. During use, the mast adjusts the position of the pile frame, and the vibratory lifting mechanism drives the hoisting rope to move the vibratory hammer up and down through the slide frame to drive or extract piles.

[0008] The aforementioned vibratory driven pile unit can be further configured such that: the top of the crushed stone pile is provided with a hopper-shaped pile opening and the bottom is provided with a flap, wherein the opening diameter of the hopper-shaped pile opening is larger than the internal diameter of the crushed stone pile.

[0009] Using the above technical solution, the crushed stone pile is a variable diameter pile, with a large upper end and a small lower end. The large diameter hopper-shaped pile opening at the upper end is directly used as a hopper. The volume of the upper pile diameter is accurately calculated to supplement the filling coefficient of the crushed stone pile, and it also serves as a clamping point for the vibratory hammer. The pile tip of the lower pile is equipped with a flap, which tightens when driven downwards and opens when pulled upwards with the combined action of the weight of the crushed stone and the air pressure.

[0010] The aforementioned vibratory driven pile unit can be further configured such that: the bottom of the vibratory hammer is provided with a sealing plug adapted to the hopper-shaped pile opening; the sealing plug is fitted into the hopper-shaped pile opening, thereby forming a sealed space inside the crushed stone pile; and the crushed stone pile is provided with an air inlet for connecting to an external air source.

[0011] Using the above technical solution, a sealing plug is designed at the bottom of the vibratory hammer. The vibratory hammer is inserted into the hopper-shaped pile opening at the upper end of the crushed stone pile, so that a sealed space is formed inside the crushed stone pile when it is pulled out. Air is injected into the crushed stone pile through the air inlet, and the crushed stone is efficiently and with high quality flowed out of the hole by air pressure, which avoids the loss of crushed stone and improves the bearing capacity of soft foundation.

[0012] The aforementioned vibratory pile driving unit can be further configured as follows: the vibratory hammer includes a vibratory hammer body and several clamps for holding crushed stone piles are provided on the vibratory hammer body, the sealing plug is provided on the center line of the vibratory hammer body, and the sealing plug is provided with a sealing ring that abuts against the hopper-shaped pile opening for sealing.

[0013] By adopting the above technical solution, the clamps on the outside can hold the hopper-shaped pile opening, and the central sealing plug seals the hopper-shaped pile opening through the sealing ring, thereby forming a closed space inside the crushed stone pile.

[0014] A construction method for driving piles using a vibratory pipe pile driver includes the following steps:

[0015] Step 1: Drive the crawler crane to the construction site, adjust the position of the mast and the adjustment frame so that the pile frame is vertically aligned with the initial pile driving point, extend the bottom fixing cylinder to fix the pile frame, install the vibratory hammer on the pile frame through the slide frame, and clamp the crushed stone pile through the vibratory lifting mechanism to drive the pile axially. After driving the crushed stone pile into the set depth, the pile driving is completed.

[0016] Step 2: Keeping the crawler crane in the same position, adjust the position of the mast and the adjustment frame so that the pile frame is vertically aligned with the next piling point. The vibratory hammer clamps another crushed stone pile and drives the crushed stone pile in. At this time, the crushed stone pile in the previous piling point is filled with crushed stone.

[0017] Step 3: Without moving the crawler crane, repeat step 2 until all crushed stone piles within the current construction area are driven and filled with crushed stone;

[0018] Step 4: Adjust the position of the mast and the adjustment frame so that the pile frame is vertically aligned with the initial pile driving point. The vibratory hammer clamps the crushed stone pile in the pile driving point and seals the end of the crushed stone pile to form a sealed space. Then, air is injected into the crushed stone pile. The vibratory hammer pulls out the pile, opens the valve, and allows the crushed stone to be discharged from the pile tip.

[0019] Step 5: Repeat Step 4 until all the crushed stone piles at all pile driving points within the current construction area have been extracted and the crushed stone has been completely filled.

[0020] Step 6: Drive the crawler crane to the next construction area and repeat the above steps in sequence.

[0021] Using the above technical solution, this invention employs a tracked hoisting method. This equipment is highly mobile and can move immediately after driving one pile to drive the next. At this time, crushed stone can be added to the previous pile, and after adding, the pile can be extracted. This back-and-forth operation greatly improves construction efficiency. Meanwhile, the crushed stone pile is a variable diameter pile, with a large upper end and a small lower end. The large diameter hopper-shaped pile opening at the upper end is directly used as a hopper to accurately calculate the volume of the upper pile diameter, which is used to supplement the filling coefficient of the crushed stone pile. It also serves as a clamping point for the vibratory hammer. The bottom of the vibratory hammer is designed with a sealing plug. The vibratory hammer is fitted into the upper end of the crushed stone pile, forming a sealed space inside the crushed stone pile. Air is injected into the crushed stone pile, and the air pressure is used to smoothly and efficiently flow the crushed stone out to form a hole.

[0022] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a construction status diagram of an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the clamping of the vibratory hammer and the crushed stone pile in an embodiment of the present invention.

[0025] Figure 3 This is a diagram showing the location of the piling points and the distribution of piling steps for a crawler crane according to an embodiment of the present invention. Detailed Implementation

[0026] like Figures 1-3 As shown, a vibratory driven pile driver unit includes a crawler crane 1, a pile frame 2 mounted on the mast 11 of the crawler crane 1, a vibratory hammer 3, a vibratory lifting mechanism, and a crushed stone pile 4. The vibratory hammer 3 is movably mounted on the pile frame 2 via a slide frame 21. The vibratory lifting mechanism is mounted on the pile frame 2 and moves the vibratory hammer 3 up and down along the pile frame 2 via a hoisting rope 12. An adjusting frame 5 and a bottom fixing cylinder 6 are provided at one end of the crawler crane 1 near the bottom of the pile frame 2. The adjusting frame 5 is used to adjust the distance between the bottom of the pile frame 2 and the crawler crane 1, and is fixed by the bottom fixing cylinder 6. The top of the crushed stone pile 4 is equipped with... The pile has a hopper-shaped opening 41 and a flap 42 at the bottom. The diameter of the opening of the hopper-shaped opening 41 is larger than the internal diameter of the crushed stone pile 4. The bottom of the vibrating hammer 3 is provided with a sealing plug 31 that is adapted to the hopper-shaped opening 41. The sealing plug 31 is fitted into the hopper-shaped opening 41 and forms a sealed space inside the crushed stone pile 4. The crushed stone pile 4 is provided with an air inlet 43 for connecting to an external air source. The vibrating hammer 3 includes a vibrating hammer body 32 and several clamps 33 provided on the vibrating hammer body 32 for clamping the crushed stone pile 4. The sealing plug 31 is located on the center line of the vibrating hammer body 32. The sealing plug 31 is provided with a sealing ring 311 that abuts against the hopper-shaped opening 41 for sealing.

[0027] A construction method for driving piles using a vibratory pipe pile driver includes the following steps:

[0028] Step 1: Drive the crawler crane 1 to the construction point, adjust the position of the mast 11 and the adjustment frame 5 so that the pile frame 2 is vertically aligned with the initial pile driving point, extend the bottom fixing cylinder 6 to fix the pile frame 2, and ensure the verticality of the crushed stone pile 4 with the pile driving point. The vibratory hammer 3 is installed on the pile frame 2 through the slide frame 21 and clamps the crushed stone pile 4 to drive the pile axially through the vibratory lifting mechanism. After the crushed stone pile 4 is driven into the set depth, the pile driving is completed.

[0029] Step 2: Keep the position of crawler crane 1 unchanged, adjust the position of mast 11 and adjusting frame 5 so that pile frame 2 is vertically aligned with the next pile driving point. Vibratory hammer 3 clamps another crushed stone pile 4 and drives the crushed stone pile 4 into the pile. At this time, crushed stone is filled into the crushed stone pile 4 in the previous pile driving point.

[0030] Step 3: Without moving the crawler crane 1, repeat step 2 until all the crushed stone piles 4 within the current construction area are driven and filled with crushed stone;

[0031] Step 4: Adjust the position of the mast 11 and the adjusting frame 5 so that the pile frame 2 is vertically aligned with the initial pile driving point. The vibratory hammer 3 clamps the crushed stone pile 4 in the pile driving point and seals the hopper-shaped pile opening 41 of the crushed stone pile 4 with the sealing plug 31 to form a sealed space. Then, connect the air source to the air inlet 43 of the crushed stone pile 4 and fill it with air. The vibratory hammer 3 pulls out the pile, opens the valve 42, and discharges the crushed stone from the pile tip.

[0032] Step 5: Repeat Step 4 until all the crushed stone piles 4 in all pile driving points within the current construction area are extracted and filled with crushed stone;

[0033] Step 6: Drive the crawler crane 1 to the next construction area and repeat the above steps in sequence.

Claims

1. A method of driving piles using a vibratory pipe pile driving rig, characterised in that, Comprising the following steps: Step 1, drive the crawler crane to the construction point, adjust the position of the mast and the adjusting frame, make the pile frame vertical to the initial pile point, extend the bottom fixed oil cylinder to fix the pile frame, install the vibrating hammer on the pile frame through the slide frame, clamp the gravel pile pipe through the vibration lifting mechanism, and axially pile the gravel pile pipe, complete the pile driving after the gravel pile pipe is driven into the set depth; Step 2, the position of the crawler crane remains unchanged, adjust the position of the mast and the adjusting frame, make the pile frame vertical to the next pile point, clamp another gravel pile pipe with the vibrating hammer, and drive the gravel pile pipe, at this time, fill the gravel into the gravel pile pipe in the previous pile point; Step 3, without moving the crawler crane, repeat step 2 until all gravel pile pipes in the current construction range are driven and filled with gravel; Step 4, adjust the position of the mast and the adjusting frame, make the pile frame vertical to the initial pile point, clamp the gravel pile pipe in the pile point with the vibrating hammer, seal the end of the gravel pile pipe to form a sealed space, then inflate the gravel pile pipe, pull out the pile with the vibrating hammer to open the flap, and make the gravel discharge from the pile tip; Step 5, repeat step 4 until all gravel pile pipes in the current construction range are pulled out and filled with gravel; Step 6, drive the crawler crane to the next construction area, and repeat the above steps in turn; The vibrating pipe pile driving machine set comprises a crawler crane, a pile frame arranged on the mast of the crawler crane, a vibrating hammer, a vibration lifting mechanism and a gravel pile pipe, the vibrating hammer is movably installed on the pile frame through a slide frame, the vibration lifting mechanism is installed on the pile frame, the vibrating hammer is hung by a lifting rope and moves up and down along the pile frame, the end of the crawler crane close to the bottom of the pile frame is provided with an adjusting frame and a bottom fixed oil cylinder arranged on the adjusting frame, the adjusting frame is used to adjust the distance between the bottom of the pile frame and the crawler crane, and the adjusting frame is fixed by the bottom fixed oil cylinder, the top of the gravel pile pipe is provided with a hopper-shaped pile mouth, and the bottom is provided with a flap, the opening diameter of the hopper-shaped pile mouth is larger than the inner diameter of the gravel pile pipe, the bottom of the vibrating hammer is provided with a sealing plug matched with the hopper-shaped pile mouth, the sealing plug is sleeved into the hopper-shaped pile mouth, and a closed space is formed in the gravel pile pipe, and the gravel pile pipe is provided with an air inlet connected with an external air source.

2. The construction method of claim 1, wherein the method further comprises: The vibrating hammer comprises a vibrating hammer body, a plurality of clamps arranged on the vibrating hammer body for clamping the gravel pile pipe, the sealing plug is arranged on the center line of the vibrating hammer body, and the outer portion of the sealing plug is provided with a sealing ring abutting and sealing with the hopper-shaped pile mouth.

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