CN-121802838-B - Hammering pile sinking device with strong pulse airflow targeting resistance breaking function and use method

CN121802838BCN 121802838 BCN121802838 BCN 121802838BCN-121802838-B

Abstract

The invention discloses a hammering pile sinking device for strong pulse airflow targeted resistance breaking and a use method thereof, and relates to the technical field of foundation construction of constructional engineering. The heavy hammer and related components provide continuous hammering force through the cyclic motion of the heavy hammer, the hammering force is transmitted to the precast pile through the force transmission cylinder, the pile head plate and the guide cap and guides the pile body to vertically sink, the strong pulse gas generating system generates strong pulse gas flow, the strong pulse gas flow is transmitted to the pile tip through the exhaust pipe and the slurry pipe, the flow direction of the gas flow can be controlled through the valve, the power-assisted excess pore water pressure is dissipated, and the targeted resistance breaking device receives the hammering force and the strong pulse gas flow to realize targeted resistance breaking pile sinking. The pile sinking device can effectively improve pile sinking efficiency and stability, and is suitable for pile sinking construction under different geological conditions.

Inventors

SUN KANG
YANG ZHIJIAN
HE GANGYUE
GAO SHENWEI
Liang Tongyue
HOU XIANZHUANG
WANG YING

Assignees

沈阳帝铂建筑工程有限公司

Dates

Publication Date: 20260505
Application Date: 20260306

Claims (8)

1. The hammering pile sinking device for the strong pulse airflow targeted breaking comprises a heavy hammer system, wherein the heavy hammer system comprises a heavy hammer (1-1), an oil tank (1-3), a deflagration chamber (1-4), a force transmission cylinder (1-5), a guide cap (1-7) and a pile head plate (1-6), and is characterized by further comprising a strong pulse gas generation system and a targeted breaking device; The high-pulse gas generation system comprises a transmission rod (2-1), a guide disc (2-2), a return spring (2-3), a piston beam (2-4), a piston rod (2-5), a piston (2-6), an air inlet pin (2-7), a piston cylinder body (2-8), an exhaust pipe (2-9), an upper exhaust valve pipe (2-10) and a lower exhaust valve pipe (2-12), wherein the transmission rod (2-1) is arranged between the guide disc (2-2) and the oil tank (1-3), passes through the oil tank (1-3) and protrudes from the top of the oil tank (1-3), the transmission rod (2-1) can move up and down in the oil tank (1-3), the guide disc (2-2) is positioned at the bottom of the piston cylinder body (2-8), the piston cylinder body (2-8) is sleeved outside the transmission rod (2-1), the return spring (2-3) is sleeved outside the transmission rod (2-1), the upper part of the return spring (2-3) is pushed onto the piston beam (2-4) and the lower part of the piston beam (2-4) is positioned on the guide disc (2-4) The piston rod (2-5) and the piston (2-6) are both positioned in the piston cylinder body (2-8), the top of the piston rod (2-5) is connected with the bottom of the piston beam (2-4), the bottom of the piston rod is connected with the piston (2-6), the air inlet pin (2-7) is arranged in the piston (2-6), the exhaust pipe (2-9) is arranged at the bottom of the piston cylinder body (2-8), a one-way exhaust valve (2-11) is arranged in the exhaust pipe (2-9), the upper exhaust valve pipe (2-10) is arranged at the top of the one-way exhaust valve (2-11), and the lower exhaust valve pipe (2-12) is arranged at the bottom of the one-way exhaust valve (2-11); The targeted resistance breaking device comprises a precast pile (3-2), a slurry pipe (3-1) and a pile tip (3-3), wherein the precast pile (3-2) is arranged at the bottom of a guide cap (1-7), holes are reserved in the precast pile (3-2), the slurry pipe (3-1) is positioned in the holes of the precast pile (3-2) and penetrates through the precast pile (3-2), and the pile tip (3-3) is positioned at the bottom of the precast pile (3-2).
2. The hammering pile sinking device for targeted breaking of strong pulse airflow is characterized in that guide rods (1-2) are arranged on two sides of a heavy hammer (1-1), the heavy hammer (1-1) moves longitudinally along the guide rods (1-2), a deflagration chamber (1-4) is arranged at the bottom of the heavy hammer (1-1), an oil tank (1-3) is arranged at one side of the deflagration chamber (1-4) and can regularly spray diesel oil into the deflagration chamber (1-4), a force transmission cylinder (1-5) is arranged below the deflagration chamber (1-4), and guide caps (1-7) and pile head plates (1-6) are arranged below the force transmission cylinder (1-5).
3. The hammering pile sinking device for strong pulse airflow targeted breaking resistance according to claim 1, wherein the lower end of the air inlet pin (2-7) is a conical section (2-7-3), the middle is a thin cylindrical section (2-7-2), and the upper end is a thick spherical section (2-7-1).
4. The hammering pile sinking device for targeted breaking of strong pulse airflow is characterized in that a round hole (2-6-1) is formed in the piston (2-6), the inner diameter of the round hole (2-6-1) is slightly larger than the outer diameter of a thin cylindrical section (2-7-2) of the air inlet pin (2-7), the length of the thin cylindrical section (2-7-2) of the air inlet pin (2-7) is larger than the height of the round hole (2-6-1), the lower portion of the round hole (2-6-1) is a conical hole, the conical hole is consistent with the cross section of a conical section (2-7-3) at the lower end of the air inlet pin (2-7), and the diameter of a thick spherical section (2-7-1) at the upper portion of the air inlet pin (2-7) is far larger than the diameter of the round hole (2-6-1) on the piston (2-6).
5. A hammering pile sinking device with strong pulse airflow targeting breaking resistance according to claim 1 is characterized in that the pile tip (3-3) comprises a pile tip vent hole (3-3-1), a pile tip transverse plate (3-3-2) and a pile tip vertical plate (3-3-3), the shape and the size of the pile tip transverse plate (3-3-2) are identical to those of the bottom section of a precast pile (3-2), the pile tip vent hole (3-3-1) is located at the center position of the pile tip transverse plate (3-3-2), and the pile tip vent hole (3-3-1) can be divided into 1/2 circles or 1/4 circles by the pile tip vertical plate (3-3-3).
6. A hammering pile sinking device with strong pulse airflow targeting breaking function according to claim 1 is characterized in that the piston (2-6) generates strong pulse airflow (4-1) when moving in the piston cylinder (2-8), the strong pulse airflow (4-1) is discharged to the air outside the device along the upper exhaust valve pipe (2-10) in the opening state of the upper exhaust valve pipe (2-10) and is not transmitted to a pile tip (3-3), and the strong pulse airflow (4-1) at the bottom stress concentration area (4-2) of the precast pile (3-2) and the pile side can be discharged when the lower exhaust valve pipe (2-12) is opened.
7. A method for using a hammering pile sinking device with strong pulse airflow targeted breaking resistance is characterized by comprising the following steps: S1, mounting a pile tip (3-3) at the lower part of a precast pile (3-2), mounting the lower end of a slurry pipe (3-1) at the upper part of a pile tip exhaust hole (3-3-1) in the center of the pile tip (3-3), penetrating and mounting the slurry pipe (3-1) in an inner hole of the precast pile (3-2), communicating the upper end of the slurry pipe (3-1) with an upper exhaust valve pipe (2-10), hoisting the precast pile (3-2) in the middle of a guide cap (1-7), enabling the upper end of the precast pile (3-2) to be attached to a pile head plate (1-6), aligning the center of the pile tip (3-3) at the lower end of the precast pile (3-2) with a designed pile position, and adjusting the hoisting verticality of the precast pile (3-2) to meet design requirements; S2 lifting the heavy hammer (1-1), synchronously controlling an oil tank to spray diesel oil into a detonation chamber, increasing the air pressure in the detonation chamber (1-4) in the falling process of the heavy hammer (1-1), knocking the diesel oil after reaching the ignition point of the diesel oil, pushing the heavy hammer (1-1) to bounce, then discharging waste gas, continuously spraying the diesel oil, and dropping the heavy hammer (1-1) again, circularly realizing continuous falling hammering of the heavy hammer (1-1), continuously beating a transmission rod (2-1) in the repeated circulating falling process of the heavy hammer (1-1), continuously beating the transmission rod (2-1), downwards moving the transmission rod (2-1) under the beating action of the heavy hammer (1-1), simultaneously driving a piston beam (2-4), a piston rod (2-5) and a piston (2-6) to downwards move in the piston cylinder (2-8) together, thereby generating strong pulse air flow (4-1), upwards bouncing the transmission rod (2-1) under the elastic action of a reset spring (2-3) when the heavy hammer (1-1) bounces, entering the piston cylinder (2-8) into the air, preparing the strong air flow (1-1) for one-way to enter the exhaust valve (2-1) through the strong air flow (1-1), and the strong air flow (1-1) is prepared to be compressed by the strong air flow (1-1) (1-1), then the high-speed ejection is carried out from the pile tip exhaust hole (3-3-1) in a strong pulse mode; S3, after pile sinking operation is completed, a lower exhaust valve pipe (2-12) is opened, after strong pulse air flow (4-1) in a slurry air pipe (3-1), strong pulse air flow (4-1) in a precast pile (3-2) bottom stress concentration area (4-2) and excess pore water pressure at the bottom of the precast pile (3-2) are completely dissipated, cement slurry is injected into the bottom and side pressure of the precast pile (3-2) along the slurry air pipe (3-1) and the pile tip exhaust hole (3-3-1), and the cement slurry fills cracks generated by the cleavage of the strong pulse air flow (4-1) in the precast pile (3-2) bottom stress concentration area (4-2) under the pressure effect and air barriers at the side of the precast pile (3-2), so that the bearing capacity of the precast pile (3-2) is increased.
8. The method of using a hammering pile sinking device for targeted breaking of strong pulse air flow according to claim 7, wherein in the step S3, after strong pulse air flow (4-1) in the bottom stress concentration area (4-2) of the precast pile (3-2) and the excess pore water pressure at the bottom of the precast pile (3-2) are completely dissipated along the air pipe (3-1), cement slurry is injected into the bottom and the side surface of the precast pile (3-2) along the air pipe (3-1) and the pile tip exhaust hole (3-3-1), and the cement slurry fills the cracks generated by the cleavage of the strong pulse air flow (4-1) in the bottom stress concentration area (4-2) of the precast pile (3-2) under the pressure effect and the air barrier at the side surface of the precast pile (3-2) so as to further increase the bearing capacity of the precast pile (3-2).

Description

Hammering pile sinking device with strong pulse airflow targeting resistance breaking function and use method Technical Field The invention relates to the technical field of foundation construction of constructional engineering, in particular to a hammering pile sinking device with strong pulse airflow targeting resistance breaking and a use method thereof. Background In the foundation construction of building engineering, hammering pile sinking is a widely applied foundation construction method, and the principle is that the pile body is sunk into the ground by the impact force generated by falling of a heavy hammer to a preset depth, so that a stable bearing foundation is provided for a building. The traditional hammering pile sinking technology mainly comprises a diesel hammer, a hydraulic hammer and the like. The pile sinking resistance of the precast pile bottom is obviously increased when hammering the pile sinking under complex geological conditions such as a compact soil layer and the like, and a plurality of difficulties are brought to pile sinking construction, namely, in a sand layer, the friction force between sand grains is large, the large resistance needs to be overcome when a pile body sinks, in the compact soil layer, the compactness of the soil body is high, the precast pile bottom is difficult to squeeze into the soil body, the pile sinking efficiency is low, and in saturated clay, the pile sinking is hindered by the excessive pore water pressure at the precast pile bottom or the precast pile bottom part in the hammering process due to poor water permeability. To solve these problems, conventional methods are generally to increase the hammering energy, increase the weight of the weight, or increase the drop distance of the hammering. However, the method has the defects that on one hand, the pile body is possibly subjected to excessive stress due to excessive hammering energy, so that the pile body is broken and damaged, the construction cost and the safety risk are increased, and in addition, the hammering energy is simply increased, larger vibration and noise are also generated, the surrounding environment is seriously influenced, and particularly in places with higher requirements on the environment, such as urban areas, the influence is more remarkable. Through retrieval, patent number CN118516977A discloses a steel pipe pile sinking device and a using method thereof, the device comprises a steel pipe pile, the top end and the bottom end of the steel pipe pile are respectively provided with a thread groove, the bottom end of the steel pipe pile is provided with a soil breaking mechanism, the soil breaking mechanism comprises a thread head which is arranged at the bottom of the steel pipe pile in a threaded manner, and the device also comprises a round block, a drill bit is fixedly arranged at the bottom of the round block, a round cavity is formed in the round block, and a round mounting plate is arranged in the round cavity. Compared with the device, the device has the obvious defects that firstly, a targeted resistance breaking structure is lacked, resistance breaking cannot be assisted through airflow, pile sinking efficiency in a compact soil layer or a hard rock layer is low, and secondly, excessive pore water pressure generated by soil disturbance in the pile sinking process is difficult to discharge, pile position deviation is easy to cause, and pile sinking stability is affected. Through retrieving, patent number CN117127609A discloses a pile sinking assisting device for a prefabricated pipe pile and a construction method, the device comprises a sinking assisting component, the sinking assisting component comprises a connecting component, a drill rod assembly, a driving box assembly, a reamer assembly and a main drill bit, one end of the connecting component is connected with one end of the drill rod assembly, the other end of the connecting component is connected with external equipment, the reamer assembly is connected with the driving box assembly, the driving box assembly sleeved on the drill rod assembly is used for driving the reamer assembly to slide along the axial direction of the drill rod assembly, so that the reamer assembly is contained in a pipe hole of the prefabricated pipe pile or exposed outside the pipe hole of the prefabricated pipe pile, the drill rod assembly is connected with the main drill bit, the main drill bit is used for drilling a stratum covered by an inner cavity projection surface of the prefabricated pipe pile, and the reamer assembly is used for drilling a stratum outside the inner cavity projection surface of the prefabricated pipe pile, so that a larger drill hole can be drilled through the main drill bit and the reaming drill bit. The pile sinking device has the advantages that the hole diameter of the guide hole is larger than the pile outer diameter, pile sinking resistance of a hard soil layer is greatly reduced or even eliminated, and co