CN113585258B

CN113585258B - Pile driving device based on water hammer effect and pile adopting pile driving device

Info

Publication number: CN113585258B
Application number: CN202110929138.XA
Authority: CN
Inventors: 熊庭; 郑睿; 危卫; 张凯迪
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-09-30
Anticipated expiration: 2041-08-13
Also published as: CN113585258A

Abstract

The invention relates to a pile driving device based on a water hammer effect and a pile adopting the pile driving device, which comprise a water hammer bin and a pressure generating assembly, wherein the water hammer bin is provided with a cavity; the pressure produces the subassembly and includes pressure chamber, a plurality of gas generator and relief valve, the inside cavity of pressure chamber, the pressure chamber set up in the outside in water hammer storehouse and with cavity bottom intercommunication, a plurality of through-holes and an exhaust hole have been seted up to the lateral wall of pressure chamber, and is a plurality of the through-hole is followed the lateral wall interval distribution of pressure chamber, gas generator with the through-hole one-to-one set up and detachable install in the through-hole, the relief valve passes through the exhaust hole with the pressure chamber intercommunication. The embodiment of the invention has the following beneficial effects: the pressure chamber is arranged at the periphery of the water hammer bin, and the gas generators are distributed along the side wall of the pressure chamber, so that the gas generators are convenient to install or replace.

Description

Pile driving device based on water hammer effect and pile adopting pile driving device

Technical Field

The invention relates to the technical field of installation of offshore wind power piles, in particular to a pile driving device based on a water hammer effect and a pile adopting the pile driving device.

Background

Offshore wind resources are more abundant than land, so that the construction of wind power plants at sea is a trend of wind power development.

The offshore pile sinking technology in China still needs to be developed, the large-diameter pile hammer is limited by the limit manufacturing capability, and gaps are mainly made up by importing foreign equipment. At present, hydraulic hammers are mostly adopted for offshore piling equipment, but the development of piling technology is limited due to the defects that the weight of the hydraulic hammers on the market is too large, the pollution to water areas is serious and the like. In patent document CN112900434A, a pile driving device is disclosed, which utilizes the water hammer effect and makes the pile body obtain two penetration degrees by one-time fuel combustion explosion, and the device makes up for the defects of a hydraulic hammer, greatly reduces the pollution to the environment, and has simple structure and convenient carrying. However, the use of pilings is limited, and it is inconvenient that one fuel explosion may cause an adjacent multiple fuel explosion, and that the entire apparatus needs to be removed to install or replace the fuel.

Disclosure of Invention

In view of the above, there is a need for a pile driving device based on water hammer effect and a pile using the pile driving device, so as to solve the problems that the device for driving piles by using water hammer effect in the prior art is difficult to replace or install in fuel and that one explosion may detonate multiple fuels.

The invention provides a pile driving device based on a water hammer effect, which comprises a water hammer bin and a pressure generating assembly, wherein the water hammer bin is provided with a cavity; the pressure produces the subassembly and includes pressure chamber, a plurality of gas generator and relief valve, the inside cavity of pressure chamber, the pressure chamber set up in the outside in water hammer storehouse and with cavity bottom intercommunication, a plurality of through-holes and an exhaust hole have been seted up to the lateral wall of pressure chamber, and is a plurality of the through-hole is followed the lateral wall interval distribution of pressure chamber, gas generator with the through-hole one-to-one set up and detachable install in the through-hole, the relief valve passes through the exhaust hole with the pressure chamber intercommunication.

Furthermore, an airflow guide pipe is formed inside the pressure chamber, one end of the airflow guide pipe penetrates through the pressure chamber, is connected to the bottom of the water hammer bin and is communicated with the cavity, and the other end of the airflow guide pipe is arranged in the pressure chamber.

Furthermore, one end of the airflow guide pipe, which is positioned in the pressure chamber, is connected to the bottom of the pressure chamber, a plurality of airflow through holes are formed in the side wall of the airflow guide pipe around the circumferential direction of the airflow guide pipe, and the airflow guide pipe is communicated with the pressure chamber through the airflow through holes

Furthermore, an exhaust pipe is installed on the side wall of the pressure chamber, the exhaust pipe is communicated with the inside of the pressure chamber through an installation hole, and a pressure release valve is installed at one end, far away from the pressure chamber, of the exhaust pipe and used for controlling the release of gas inside the pressure chamber.

Further, install a plurality of drainage plates on the inner wall in water hammer storehouse, each the drainage plate is arranged along the direction that hinders the rivers, and is a plurality of the drainage plate is followed the inner wall circumference interval distribution in water hammer storehouse, the drainage plate has the drainage face, the drainage plate has first station and second station, works as when the drainage plate is in first station, the drainage face with the inner wall in water hammer storehouse has certain angle, works as when the drainage plate is in the second station, the drainage plate deviates from the one side of drainage face is hugged closely the inner wall in water hammer storehouse.

Furthermore, one side of the drainage plate, which is connected with the inner wall of the water hammer bin, is matched with the shape of the inner wall of the water hammer bin.

Further, a plurality of holding rings are installed to the inner wall in water hammer storehouse, the stopper has and has seted up the mounting hole on the face of drainage plate, the drainage plate with the holding ring one-to-one sets up and passes through the mounting hole with the rotatable connection of holding ring, the stopper is located on the drainage face, be used for the restriction the drainage plate is relative the turned angle of holding ring.

Further, gas generator includes casing, explosive, filter screen and ignition, the casing with the through-hole cooperation, the casing orientation the one end opening of pressure chamber, place in the explosive in the cavity of casing, the filter screen install in the opening part, ignition is located the casing is relative open-ended one end.

The invention also provides a pile adopting the water hammer effect-based pile driving device, which comprises a pile body and the water hammer effect-based pile driving device; the upper end of the pile body is detachably connected to the bottom of the water hammer bin.

Furthermore, the bottom of the water hammer bin is communicated with the pressure chamber, and the bottom of the pressure chamber is detachably connected to the upper end of the pile body.

Compared with the prior art, the pile driving device based on the water hammer effect is characterized in that liquid is injected into the water hammer bin, the pressure chamber is arranged on the periphery of the water hammer bin and is communicated with the bottom of the cavity of the water hammer bin, the gas generator is distributed along the outer wall of the pressure chamber, high-pressure gas generated by the gas generator is transmitted to the liquid acted on the water hammer bin through the pressure chamber to enable the liquid to rise to a certain height, then the pressure release valve is opened to discharge the high-pressure gas, and the rising liquid falls to form the water hammer effect for pile driving; after the fuel in the gas generator explodes, the gas generator can be disassembled for replacement, and the fuel is filled in the gas generator, so that the situation that the fuel is frequently generated due to one explosion can be avoided.

The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a pile driving device based on water hammer effect and a pile using the pile driving device provided by the invention;

FIG. 2 is a schematic structural diagram of a water hammer bin according to an embodiment of the present invention;

FIG. 3 is a schematic view of another angle of the water hammer chamber according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of a flow guide plate according to an embodiment of the present invention;

FIG. 5 is a schematic view of the mounting structure of a flow guide plate according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a gas generator according to an embodiment of the present invention.

Detailed Description

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.

As shown in fig. 1-6, the pile using the pile driving device based on water hammer effect provided by the embodiment of the invention comprises a pile body 1 and a pile driving device 2 based on water hammer effect. The pile body 1 is inserted into the seabed in a manner of being vertical to the sea level, the bottom of the water hammer bin 21 of the pile driving device 2 based on the water hammer effect is detachable from the top of the pile body 1, the explosive force generated by fuel explosion of the pile driving device 2 based on the water hammer effect and the water hammer effect generated by driving liquid to ascend by high-pressure gas and then descend act on the pile body 1, and pile driving operation is carried out.

It should be noted that, the pile driving device 2 based on the water hammer effect and the pile body 1 are fastened and connected through a bolt, in other embodiments, a clamping manner or the like may be adopted, and it should be understood that, as long as the fastening and the detachment between the pile driving device 2 based on the water hammer effect and the pile body 1 can be ensured.

It should be noted that, the pile body 1 of the pile body 1 may be an extruded pile or a non-extruded pile, in this embodiment, the pile body 1 is a non-extruded pile; pile body 1 can be any shape and specification, such as cylindrical, square, hexagonal, etc., in this embodiment, pile body 1 is cylindrical, and the diameter of pile body 1 is set according to the piling requirement.

As shown in fig. 2, the pile driving device 2 based on the water hammer effect comprises a water hammer bin 21 and a pressure generating assembly 22, wherein the water hammer bin 21 is provided with a cavity; the pressure generating assembly 22 includes a pressure chamber 221, a plurality of gas generators 222 and a pressure relief valve 223, the pressure chamber 221 is hollow, the pressure chamber 221 is disposed outside the water hammer bin 21 and is communicated with the bottom of the cavity, a plurality of through holes 2211 and an exhaust hole (not shown in the figure) are formed in a side wall of the pressure chamber 221, the plurality of through holes 2211 are distributed at intervals along the side wall of the pressure chamber 221, the gas generators 222 and the through holes 2211 are disposed in a one-to-one correspondence and detachably mounted in the through holes 2211, and the pressure relief valve 223 is communicated with the pressure chamber 221 through the exhaust hole.

In addition, liquid is injected into the hydraulic ram 21 by means of a hydraulic pump or the like, and in the present embodiment, the liquid is water; wherein, water occupies about one third of the volume of the water hammer bin, and the upper part of the water hammer bin is ensured to have a space for the water column to rise.

It should be noted that the pressure chamber 221 is communicated with the cavity of the water hammer chamber 21 to ensure that the high-pressure gas generated by the gas generator 222 acts on the water column in the cavity through the pressure chamber 221, and the pressure chamber 221 is disposed outside the water hammer chamber 21 to facilitate installation or replacement of the gas generator 222.

It should be noted that the pressure chamber 221 is sleeved outside the water hammer bin 21 in a sealable manner, and the cavity is communicated with the pressure chamber 221 through an opening on the side wall of the bottom of the water hammer bin 21, in this case, the bottom of the water hammer bin 21 is detachably connected with the top of the pile body 1; or the pressure chamber 221 and the water hammer bin 21 can be distributed in parallel, and high-pressure gas in the pressure chamber 221 is introduced into the cavity through the lower end of the water hammer bin 21 in a pipeline arrangement mode, in this case, the bottom of the water hammer bin 21 is detachably connected with the top of the pile body 1; in this embodiment, pressure chamber 221 is located between water hammer bin 21 and pile body 1, water hammer bin 21 is indirectly connected to the upper end of pile body 1 through pressure chamber 221, specifically, the top of pile body 1 is closed and detachably connected to the bottom of pressure chamber 221, two ends of water hammer bin 21 are open and the lower end thereof is communicated with pressure chamber 221; it is understood that the connection manner of the pressure chamber 221 and the water hammer chamber 21 is not limited to the above, as long as the pressure generating assembly 22 is ensured outside the water hammer chamber 21, the fuel in the gas generator 222 is convenient to install or replace, and the pressure chamber 221 is communicated with the cavity of the water hammer chamber 21.

Specifically, in this embodiment, the connection portions of the pile body 1 and the pressure chamber 221 are respectively provided with an annular boss, the two annular bosses have connection holes at corresponding positions, and the pile body 1 and the pressure chamber 221 are fixed by a bolt through the connection holes.

It should be noted that, in this embodiment, the through holes 2211 are circumferentially distributed at intervals along the outer wall of the pressure chamber 221, the gas generator 222 is detachably connected to the through holes 2211 in a matching manner, and a sealing measure needs to be taken between the gas generator 222 and the through holes 2211 to ensure that the high-pressure gas generated by the gas generator 222 does not overflow to the outside of the pressure chamber 221, which affects the piling efficiency of the piling device. Specifically, in this embodiment, the inner wall of the through hole 2211 has an internal thread, the outer wall of the gas generator 222 has an external thread matching the internal thread, and the outer wall of the gas generator 222 is sleeved with a high-temperature-resistant sealing ring, and the gas generator 222 is screwed with the through hole 2211 through the thread, so as to achieve detachable sealing connection; it is understood that the connection of the gas generator 222 to the through-hole 2211 is not limited thereto in other embodiments.

It should be noted that the pressure relief valve 223 is communicated with the pressure chamber 221, and is used for discharging gas generated after fuel explosion, specifically, when the gas drives the water column to rise to a certain height, the pressure relief valve 223 is opened, so that the gas in the cavity and the pressure chamber 221 is discharged, and the water column falls to form a water hammer; the air is exhausted through the pressure relief valve 223, so that an air spring is prevented from being formed in the cavity, the falling of a water column is influenced, and the piling efficiency is further influenced.

In a preferred embodiment, an airflow duct 2212 is formed inside the pressure chamber 221, one end of the airflow duct 2212 penetrates through the pressure chamber 221 and is connected to the water hammer chamber 21, and is communicated with the cavity, and the other end of the airflow duct 2212 is embedded in the pressure chamber 221.

It should be noted that, in practical applications, the large-diameter water hammer bin 21 is arranged to ensure that the water column in the cavity falls to generate sufficient impact force to pile, and correspondingly, the diameter of the pressure chamber 221 is also very large, and by arranging the air flow conduit 2212, the air generated by the air generator 222 can enter the cavity 211 through a centralized inlet, so as to avoid that the air is dispersed through large spatial energy, which results in insufficient explosive force, and affects the pile-driving efficiency of the water hammer effect. Wherein the gas flow conduit 2212 is arranged coaxially with the pressure chamber 221.

As a preferred embodiment, one end of the air flow conduit 2212 located inside the pressure chamber 221 is connected to the bottom of the pressure chamber 221, the side wall of the air flow conduit 2212 is opened with a plurality of air flow through holes 2212a around the circumference thereof, and the air flow conduit 2212 is communicated with the pressure chamber 221 through the air flow through holes 2212 a.

It should be noted that, by connecting the bottom end of the air flow conduit 2212 to the inner wall of the pressure chamber 221 and forming the air flow through holes 2212a along the circumferential direction of the bottom of the air flow conduit 2212, the gas and energy generated after the fuel explosion can enter the cavity in a more concentrated manner, thereby improving the piling efficiency.

Specifically, in this embodiment, the airflow hole 2212a is square, and in other embodiments, the airflow hole 2212a may have other shapes; the number of the air flow through holes 2212a can be any number, wherein the number of the air flow through holes 2212a determines the passing efficiency of the air flow, and can be reasonably set according to the requirement.

In a preferred embodiment, an exhaust pipe 2213 is mounted on a side wall of the pressure chamber 221, the exhaust pipe 2213 communicates with the inside of the pressure chamber 221 through a mounting hole, and the relief valve 223 is mounted at one end of the exhaust pipe 2213 away from the pressure chamber 221 and used for controlling the release of gas inside the pressure chamber.

It should be noted that, by providing the exhaust pipe 2213 and installing the pressure relief valve 223 at the end of the exhaust pipe 2213, the pressure relief valve 223 can be controlled more conveniently.

As a preferred embodiment, install a plurality of drainage plates 3 on the inner wall of water hammer bin, it is a plurality of drainage plates 3 follow the inner wall circumference interval distribution of water hammer bin 21, each drainage plate 3 arranges along the direction that hinders rivers, drainage plate 3 has drainage face 31, drainage plate 3 has first station and second station, works as when drainage plate 3 is in first station, drainage face 31 with the inner wall of cavity 211 has certain angle, works as when drainage plate 3 is in the second station, drainage plate 3 deviates from drainage face 31 one side is hugged closely the inner wall of water hammer bin 21.

It should be noted that, through setting up drainage plate 3, under drainage effect of drainage plate 3, can make gaseous more abundant effect in central water column, increase the ascending impact force of central water column, improve pile efficiency. The flow guide plate 3 is switched between the first station and the second station, when the gas generator 222 does not generate high-pressure gas, the flow guide plate 3 is positioned at the first station, and a certain included angle is formed between the flow guide plate 3 and the inner wall of the water hammer bin 21; when the high-pressure gas generated by the gas generator 222 acts on the cavity 211 to impact the water column in the cavity 211 upwards, the water column impacts the drainage surface 31 of the drainage plate 3 to enable the water column to reach the second station, and one side departing from the drainage surface 31 is tightly attached to the inner wall of the water hammer bin 21.

Specifically, the number of the drainage plates 3 can be three, four or more, and can be determined according to the size of each drainage plate 3, so that a plurality of drainage plates 3 can form a complete enclosure along the inner wall of the water hammer bin 21; in this embodiment, the direction level setting of drainage plate 3 perpendicular to rivers motion has ensured the contact of rivers with the 31 maximize of drainage face, and in other embodiments, drainage plate 3 can be certain angle slope setting with the direction of rivers motion, and it can be understood that, as long as can guarantee when rivers upward motion, drainage plate 3 forms certain drainage effect to rivers can.

In a preferred embodiment, the side of the drainage plate 3 connected with the inner wall of the water hammer bin 21 is matched with the shape of the inner wall of the water hammer bin 21.

It should be noted that, by designing the flow guide plate 3 into a streamline shape matched with the shape of the inner wall of the water hammer bin 21, the water column can be ensured to move upwards from the middle of the water hammer bin 21.

As a preferred embodiment, a plurality of positioning rings 4 are installed on the inner wall of the water hammer bin 21, a limiting block 32 and a mounting hole are provided on the plate surface of the drainage plate 3, the drainage plate 3 and the positioning rings 4 are correspondingly arranged one by one and pass through the mounting hole and the positioning rings 4 are rotatably connected, and the limiting block 32 is located on the drainage surface 31 and used for limiting the rotation angle of the drainage plate 3 relative to the positioning rings 4.

It should be noted that the anchor ring of holding ring 4 sets up with the inner wall of water hammer bin 21 is perpendicular, installs drainage plate 3 on holding ring 4 through the mounting hole, and drainage plate 3 can slide along holding ring 4, slides to a certain position after, and stopper 32 on the drainage face 31 and the inner wall butt of water hammer bin 21 restrict the slip of drainage plate 3, and the position of drainage plate 3 is fixed to first station state.

Specifically, when drainage plate 3 was in first station, received water column upward movement's impact, drainage plate 3 rotated towards the second station along holding ring 4, until deviating from one side of drainage face 31 and the inner wall butt of water hammer storehouse 21, the water column descends the back, and drainage plate 3 rotates towards first station along holding ring 4 under the action of gravity, until stopper 32 and the inner wall butt of water hammer storehouse 21.

It should be noted that, the stopper 32 can be the shape such as triangle-shaped piece, quadrilateral-shaped piece, pentagon are fast, can understand, as long as can guarantee when drainage plate 3 is in first station, stopper 32 have just one side with the inner wall butt of water hammer bin 21 can, stopper 32 is the triangle-shaped piece in this embodiment to one side and the drainage face 31 of triangle-shaped piece are perpendicular, when guaranteeing that drainage plate 3 is in first station, the face is perpendicular with the direction of motion of rivers.

As a preferred embodiment, the gas generator 222 includes a housing 2221, a fuel (not shown in the drawings), a filter 2222, and an ignition device 2223, wherein the housing 2221 is fitted into the through hole 2211, the housing 2221 is open toward one end of the pressure chamber 221, the fuel is disposed in a cavity of the housing 2221, the filter 2222 is installed at the opening, and the ignition device 2223 is located at one end of the housing 2221 opposite to the opening.

In addition, after receiving the signal, the ignition device 2223 ignites the fuel by heating to generate a large amount of gas, and the gas enters the pressure chamber 221 after being filtered by the filter 2222, so that the piling operation is started.

In order to facilitate a better understanding of the embodiments of the present invention, the following detailed description of the use of the embodiments of the present application is provided:

when piling is started, the piling device 2 is installed on the pile body 1, the gas generator 222 is controlled by the control system, fuel in the gas generator is ignited to explode to generate a large amount of gas, high-pressure gas enters the pressure chamber 221 and enters the gas flow guide tube 2212 through the gas flow through hole 2212a to randomly enter the water hammer bin 21 and drive the water column in the water hammer bin to move upwards, the drainage plate 3 is pushed to be switched from the first station to the second station in the moving process of the water column, after the water column rises to a certain height, the pressure release valve 223 is opened, the gas is discharged, the water column descends to act on the pile body 1 to form the water hammer to carry out piling, and after one piling is completed, the steps can be repeated to carry out the next piling until all fuel arranged on the gas generator 222 is burnt.

Compared with the prior art, the embodiment of the invention at least has the following effects:

1. the gas generator is arranged at the periphery of the water hammer bin, so that fuel in gas generation can be conveniently installed or replaced;

2. the fuel is arranged in the shell of the gas generator, and the fuel in a certain gas generator can not affect other adjacent fuels when being combusted, so that the safety of fuel combustion is ensured;

3. through installation drainage plate, carry out the drainage to the water, can make gaseous more abundant effect on central water column, improve pile efficiency.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. A piling device based on a water hammer effect, comprising:

the water hammer bin is provided with a cavity;

the pressure generating assembly comprises a pressure chamber, a plurality of gas generators and a pressure relief valve, the pressure chamber is hollow, the pressure chamber is arranged outside the water hammer bin and communicated with the bottom of the cavity, the side wall of the pressure chamber is provided with a plurality of through holes and an exhaust hole, the through holes are distributed at intervals along the side wall of the pressure chamber, the gas generators and the through holes are arranged in a one-to-one correspondence manner and detachably mounted in the through holes, and the pressure relief valve is communicated with the pressure chamber through the exhaust hole;

the drainage plate is provided with a drainage surface, the drainage plate is provided with a first station and a second station, when the drainage plate is positioned at the first station, the drainage surface and the inner wall of the water hammer bin form a certain angle, and when the drainage plate is positioned at the second station, one surface of the drainage plate, which deviates from the drainage surface, is tightly attached to the inner wall of the water hammer bin;

a plurality of holding rings are installed to the inner wall in water hammer storehouse, the stopper has and has seted up the mounting hole on the face of drainage plate, the drainage plate with the holding ring one-to-one sets up and passes through the mounting hole with the rotatable connection of holding ring, the stopper is located on the drainage face, be used for the restriction the drainage plate is relative the turned angle of holding ring.

2. The pile driving device based on the water hammer effect according to claim 1, wherein an air flow guide pipe is formed inside the pressure chamber, one end of the air flow guide pipe penetrates through the pressure chamber, is connected to the bottom of the water hammer bin and is communicated with the cavity, and the other end of the air flow guide pipe is arranged in the pressure chamber.

3. The pile driving device based on the water hammer effect as recited in claim 2, wherein one end of the air flow conduit inside the pressure chamber is connected to the bottom of the pressure chamber, and the air flow conduit side wall is opened with a plurality of air flow through holes around the circumference thereof, and the air flow conduit is communicated with the pressure chamber through the air flow through holes.

4. The piling device based on the water hammer effect as recited in claim 1, wherein an exhaust pipe is mounted on the side wall of the pressure chamber, the exhaust pipe is communicated with the inside of the pressure chamber through an exhaust hole, and a pressure relief valve is mounted at one end of the exhaust pipe, which is far away from the pressure chamber, and is used for controlling the release of gas inside the pressure chamber.

5. The pile driving device based on the water hammer effect according to claim 1, wherein the side of the drainage plate connected with the inner wall of the water hammer bin is matched with the shape of the inner wall of the water hammer bin.

6. The pile driving device based on the water hammer effect according to claim 1, wherein the gas generator comprises a housing, fuel, a filter screen and an ignition device, the housing is matched with the through hole, the housing is open towards one end of the pressure chamber, the fuel is arranged in a cavity of the housing, the filter screen is mounted at the opening, and the ignition device is located at one end of the housing opposite to the opening.

7. A pile using a water hammer effect based piling device, which comprises a pile body and the water hammer effect based piling device according to any one of claims 1 to 6; the upper end of the pile body is detachably connected to the bottom of the water hammer bin.

8. The pile driving device based on water hammer effect according to claim 7, wherein the bottom of the water hammer bin is communicated with the pressure chamber, and the bottom of the pressure chamber is detachably connected to the upper end of the pile body.