CN115748792A - Barrel-shaped foundation with resistance reduction system and hinged suction type penetration installation method - Google Patents

Abstract

The invention discloses a barrel-shaped foundation with a resistance reducing system and a hinged suction type penetration installation method. The drag reduction system comprises a drag reduction barrel sleeve provided with a thixotropic slurry channel and a thixotropic slurry outlet, a thixotropic slurry pipe and a thixotropic slurry system; the thixotropic slurry is pressed into a gap between the resistance-reducing barrel sleeve and the soil body to reduce resistance. The negative pressure penetration system with the cutter suction device comprises the cutter suction device, a negative pressure penetration barrel cover and a negative pressure system, and the cutter suction device comprises a reamer head, a cement paste jet orifice and a high-pressure water jet orifice; the method is used for realizing negative pressure penetration, soil and stone suction and soil body reinforcement. The resistance reducing system and the cutter suction device can effectively reduce the penetration resistance of the barrel-shaped foundation, improve the penetration construction speed and are suitable for more construction terrains; the soil body reinforcing operation improves the seepage stability of the bucket foundation and effectively controls the deformation and uneven settlement in long-term construction.

Description

Barrel-shaped foundation with resistance reduction system and hinged suction type penetration installation method

Technical Field

The invention relates to the technical field of barrel foundations, in particular to a barrel foundation with a drag reduction system and a hinged suction type penetration installation method.

Background

The offshore bucket foundation relates to a large number of marine engineering project constructions, such as artificial island construction, harbor construction, island expansion, sea-crossing bridges, coastline protection, sea cofferdam engineering, and the like, and plays an extremely important role therein.

Besides the application in ocean engineering, the bucket foundation is also widely applied to practical engineering such as ventilating shafts/working shafts in land tunnel traffic engineering, working shafts in water diversion engineering, underground garages, emergency escape passages, storage spaces (for oil storage, grain storage and water storage) and the like. At present, common barrel-type foundation installation methods include impact vibration hammering and negative pressure penetration methods. The method can reduce the stability of the soil body and increase the risks of seepage damage around the bucket-shaped foundation, integral instability of the bucket-shaped foundation and even fracture damage. The negative pressure penetration method is characterized in that a barrel type foundation is installed in a penetration mode by using a negative pressure pump to form pressure difference inside and outside a barrel after self-weight penetration, belongs to a static pressure penetration method, and has relatively small disturbance on soil around a barrel body.

Therefore, in order to solve the engineering problems of instability, damage, excessive penetration resistance and the like of the barrel-shaped foundation, an improved barrel-shaped foundation structure and penetration method with high construction efficiency, economy and safety are urgently needed for the installation engineering of the barrel-shaped foundation in a complicated sea area or a land area environment with high underground water level.

Disclosure of Invention

The invention aims to provide a barrel-shaped foundation with a resistance reducing system and a hinged suction type penetration mounting method aiming at the defects of the prior art.

The purpose of the invention is realized by the following technical scheme:

according to a first aspect of the present description, there is provided a barrel foundation with a drag reduction system, comprising a barrel foundation, a drag reduction system, and a negative pressure penetration system with a cutter suction device;

the drag reduction system comprises a drag reduction barrel sleeve, a thixotropic slurry pipe and a thixotropic slurry system, wherein the drag reduction barrel sleeve is provided with a thixotropic slurry channel and a thixotropic slurry outlet; the drag reduction barrel sleeve is tightly connected to the outer side of the barrel-shaped foundation; the thixotropic slurry channel is arranged in the barrel wall of the drag reduction barrel sleeve, vertically penetrates through the drag reduction sleeve and is communicated with the outside through a thixotropic slurry outlet; the thixotropic slurry outlets are uniformly distributed at the lower part of the drag reduction barrel sleeve; one end of the thixotropic slurry pipe is connected with the thixotropic slurry system, and the other end of the thixotropic slurry pipe is communicated with the thixotropic slurry channel; the thixotropic slurry system comprises a thixotropic slurry tank, a pressure pump and a control valve;

the negative pressure penetration system with the cutter suction device comprises a cutter suction device, a negative pressure penetration barrel cover and a negative pressure system;

the cutter suction device consists of a cutter head, a rotary spraying sleeve, a drill rod and a mud pipe; the reamer head comprises a cutterhead provided with a reamer blade and is used for cutting the rock lumps in the crushed soil; the cutter head is arranged at the lower end of the rotary spraying sleeve; the rotary spraying sleeve is provided with a cement paste jet orifice and a high-pressure water jet orifice; the mud suction port is arranged on the bottom end face of the drill rod, penetrates through the drill rod, the rotary spraying sleeve and the cutter head, and is communicated with the mud discharge pipe; the rotary spraying sleeve is arranged at the lower end of a drill rod, and the drill rod penetrates through a sealing port of the negative pressure penetration barrel cover to be connected with a mud pipe;

the negative pressure penetration barrel cover comprises a top cover and a fixed steel plate, wherein the top cover is provided with a negative pressure hole and a sealing opening; the top cover is hermetically arranged at the top of the barrel-shaped foundation; the negative pressure hole is connected with a negative pressure system; the sealing opening is used for sealing connection of the drill rod, the top cover and the fixed steel plate.

According to another aspect of the present specification, there is provided a method of hinge-suction penetration installation of a bucket foundation with a drag reduction system, the method comprising the steps of:

(S1) hoisting a barrel-shaped foundation with a resistance-reducing barrel sleeve to a region to be installed, and installing a negative pressure penetration barrel cover with a twisting and sucking device;

connecting the negative pressure hole with a negative pressure system; connecting the sludge discharge pipe and the sludge discharge system; the thixotropic slurry system is communicated with the thixotropic slurry channel through a thixotropic slurry pipe;

a drill rod is put down until the bottom surface of the reamer head is flush with the elevation of the bottom surface of the barrel-shaped foundation;

(S2) after the barrel-shaped foundation uniformly sinks under the action of self weight and stops, opening a negative pressure hole and a mud suction port, and starting a negative pressure system, a reamer head in a twisting and sucking device and a mud discharging system to continuously sink and penetrate the barrel-shaped foundation;

when the reading of the soil pressure sensor near the outlet with the thixotropic slurry reaches a set value, starting the thixotropic slurry system to assist the barrel-shaped foundation to sink and penetrate;

(S3) after the barrel-shaped foundation sinks to reach the designed elevation, closing the negative pressure hole and the mud suction port, stopping the negative pressure system, replacing the thixotropic mud with a thixotropic mud curing agent, pressurizing by the thixotropic mud system, and curing the thixotropic mud in the gap between the resistance-reducing barrel sleeve and the soil body through a thixotropic mud pipe, a thixotropic mud channel and a thixotropic mud outlet;

the reamer head and the mud discharging system continue to work, and the drill rod continues to drill from top to bottom;

(S4) stopping the reamer head and the mud discharging system when the drill rod drills to a specified height;

starting a rotary spraying sleeve and a high-pressure water spraying nozzle, and spraying high-pressure water through a high-pressure water channel in a drill rod to cut soil in a region to be reinforced at the bottom of the barrel-shaped foundation;

(S5) starting a cement slurry injection port, alternately operating with the high-pressure water injection port, and injecting the cement slurry at high pressure through the cement slurry injection port after the cement slurry passes through a cement slurry channel in the drill rod to reinforce the soil body in the high-pressure water cutting area;

(S6) after the soil body at the bottom of the barrel-shaped foundation is reinforced, the cement paste injection port and the high-pressure water injection port continue to alternately operate, and the soil body in the barrel-shaped foundation is reinforced from bottom to top;

(S7) after the soil body in the barrel-shaped foundation is reinforced, closing the rotary spraying sleeve, the cement paste jet orifice and the high-pressure water jet orifice, and lifting the drill rod until the top end of the rotary spraying sleeve is flush with the bottom surface of the top cover;

(S8) after the connection between the negative pressure hole and the negative pressure system is disconnected, opening the negative pressure hole to enable the negative pressure hole to be connected with the atmosphere; opening a mud suction port, starting a mud discharge system, starting the rotary spraying sleeve and the high-pressure water injection port again, and cutting and discharging soil bodies in the barrel-shaped foundation; in the process that the high-pressure water jet orifice jets out the soil body in the high-pressure water cutting barrel, the drill rod is pushed from top to bottom, and the mud-water mixture is discharged through the mud suction port and the mud discharge system;

(S9) after the soil body in the bucket foundation is cleaned, closing the sludge suction port, and stopping the sludge discharge system, the rotary spraying sleeve and the high-pressure water jet orifice; disconnecting the thixotropic slurry pipe from the thixotropic slurry channel; disconnecting the sludge discharge pipe from the sludge discharge system; and (4) removing the negative pressure penetration barrel cover with the cutter suction device, and finishing the construction of the barrel-shaped foundation.

Further, in the step (S2), a reamer head and a drill rod of the cutter-suction device are rigid, so that a guiding effect is achieved, and the barrel-shaped foundation is guaranteed to sink vertically and penetrate downwards;

the reading value of the soil pressure sensor is the minimum pressure value of the thixotropic slurry injected;

after the thixotropic slurry system is started, the thixotropic slurry is pressurized and injected into a gap between the resistance-reducing barrel sleeve and a soil body through a thixotropic slurry pipe, a thixotropic slurry channel and a thixotropic slurry outlet and is used for reducing resistance and penetration of a barrel-shaped foundation; the pressure value of the thixotropic slurry is determined according to the soil body property and the water and soil pressure.

Further, in the steps (S4) and (S5), in the process of cutting and reinforcing the soil body at the bottom of the barrel-shaped foundation, the drill rod is slowly lifted from bottom to top; the independent operation time of the cement paste jet orifice and the high-pressure water jet orifice and the alternate operation time interval of the cement paste jet orifice and the high-pressure water jet orifice are strictly controlled, so that the barrel foundation is prevented from being disturbed.

Further, in the steps (S6) and (S7), the reinforcement height of the soil body inside the bucket-shaped foundation is determined by the internal and external seepage stability of the bucket-shaped foundation.

Further, in the steps (S4) - (S8), the pressure of the high-pressure water jetted out by the high-pressure water jet orifice and the pressure of the high-pressure cement slurry jetted out by the cement slurry jet orifice are both dynamically adjusted according to design requirements;

the high-pressure water pressure jetted by the high-pressure water jet nozzle is required to meet the cutting requirement of the soil body in the area to be reinforced; the pressure of the high-pressure cement slurry jetted by the cement slurry jet orifice is required to meet the soil body reinforcing requirement of the area to be reinforced.

Further, in the step (S9), the beneficial effects of the present invention are:

the invention develops the drag reduction system, and after being pressurized by the thixotropic slurry system, the thixotropic slurry is pressed into a gap between the drag reduction barrel sleeve and a soil body through the thixotropic slurry pipe, the thixotropic slurry channel and the thixotropic slurry outlet, so that the penetration resistance of the barrel foundation is effectively reduced, the penetration construction speed is increased, the construction period is saved, and the engineering effect of efficiently reducing drag and penetration is achieved.

The thixotropic slurry curing agent is adopted to cure the thixotropic slurry in the gap between the barrel-shaped foundation and the soil body after the thixotropic slurry is sunk to a specified elevation, so that the barrel-shaped foundation and the surrounding soil body are prevented from being emptied and even unstably damaged after sinking is finished, the overall stability of the barrel-shaped foundation is improved, and the risk of foundation settlement and displacement is reduced.

The invention develops a negative pressure penetration system with a cutter suction device, assists the penetration of a barrel-shaped foundation by a method of combining cutter suction soil with negative pressure penetration, particularly, a reamer head of the cutter suction device rotates to cut soil and discharges dregs through a sludge suction port and a sludge discharge system, the combined negative pressure system forms a pressure difference inside and outside the barrel-shaped foundation and a form of extracting soil and water in a barrel through a negative pressure hole, and the combined negative pressure system assists the penetration of the barrel-shaped foundation under the combined action, so that the penetration efficiency can be greatly improved; the bucket type foundation is guaranteed to sink vertically downwards by taking the rigid reamer head and the drill rod as guiding, the bucket type foundation is prevented from inclining, and the vertical sinking penetration effect of the bucket type foundation is improved.

The rotary spraying sleeve rotates to drive the cement slurry spraying nozzle and the high-pressure water spraying nozzle to rotate for operation, wherein the high-pressure water sprayed by the high-pressure water spraying nozzle can efficiently cut soil bodies in a large range, and the high-pressure cement slurry sprayed by the cement slurry spraying nozzle can reinforce the soil bodies in the large range; the bottom and the soil body in a certain range inside the barrel type foundation are cut and then reinforced by controlling the alternative operation of the cement slurry jet orifice and the high-pressure water jet orifice, so that the risk of seepage damage of the barrel type foundation is reduced, the seepage stability and the overall stability of the barrel type foundation are improved, and the deformation and the uneven settlement in the construction and long-term operation processes of the barrel type foundation are effectively controlled.

The high-pressure water jet nozzle has the function of cutting soil bodies, can clean the interior of the barrel-shaped foundation, is favorable for mounting the internal structure and equipment of the barrel-shaped foundation, accelerates the overall delivery progress of the barrel-shaped foundation, and has remarkable engineering economic benefit.

According to the invention, the engineering operations of drilling, cutter suction, cutting, soil body reinforcement and the like are completed in an auxiliary manner by lifting and lowering the drill rod, so that the penetration construction efficiency and the construction effect of the bucket foundation are improved.

The reamer head can cut the stones in the broken soil, prevent the gravels with larger grain diameters from blocking the pipeline and realize efficient and safe drilling operation.

The hinge suction type penetration installation technology of the bucket foundation with the resistance reducing system, which is provided by the invention, has a wide application range, and is not only suitable for the installation of the bucket foundation in water in oceans, rivers, lakes and the like, but also suitable for the installation of the bucket foundation in an land area with a higher underground water level from the common aspect of construction and application; from the geological condition of the construction soil layer, the method is not only suitable for the soft soil stratum, but also suitable for the stratum with gravels or rock blocks, and can realize the efficient and safe penetration construction of the barrel-shaped foundation under the complex geological condition.

Drawings

FIG. 1 is a cross-sectional view of a barrel foundation with a drag reduction system and a negative pressure penetration system with a cutter suction device;

FIG. 2 (a) schematic representation of a barrel foundation with drag reduction system prior to penetration installation;

FIG. 2 (b) is a schematic view of the barrel-shaped foundation being penetrated to a specified depth while the drill rod is drilling into the region to be consolidated;

FIG. 2 (c) is a schematic diagram of the cutting of the soil mass in the bottom area of the barrel foundation by the high pressure water after the drill stem continues to drill;

FIG. 2 (d) is a schematic view of the bottom region soil body reinforcement of the barrel-shaped foundation from bottom to top by cement sprayed from a cement outlet;

FIG. 2 (e) is a schematic view of the cement outlet spraying cement to continue to reinforce the soil body in the barrel-shaped foundation from bottom to top;

FIG. 2 (f) is a schematic top view of the drill rod being lifted to the barrel foundation;

FIG. 2 (g) is a schematic diagram of the drilling rod jetting high-pressure water to cut the soil body in the barrel from top to bottom;

FIG. 2 (h) is a schematic diagram showing the completion of the construction of the bucket foundation.

In the figure, a barrel-shaped foundation (1); the device comprises a drag reduction system (2), a drag reduction barrel sleeve (2-1), a thixotropic slurry channel (2-2), a thixotropic slurry outlet (2-3) and a thixotropic slurry pipe (2-4); the device comprises a cutter suction device (3), a reamer head (3-1), a cutter head (3-1-1), a reamer blade (3-1-2), a rotary spraying sleeve (3-2), a cement slurry jet orifice (3-2-1), a high-pressure water jet orifice (3-2-2), a mud suction port (3-2-3), a drill rod (3-3) and a mud discharge pipe (3-4); the negative pressure sinking barrel cover (4), the top cover (4-1), the negative pressure hole (4-2), the fixing steel plate (4-3), the sealing opening (4-4) and the bolt (4-5).

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1, the barrel-shaped foundation with the drag reduction system provided by the embodiment of the present invention includes a barrel-shaped foundation 1, a drag reduction system 2, and a negative pressure penetration system with a cutter suction device;

the drag reduction system 2 comprises drag reduction barrel sleeves 2-1, thixotropic slurry channels 2-2, thixotropic slurry outlets 2-3, thixotropic slurry pipes 2-4 and a thixotropic slurry system;

the negative pressure penetration system with the cutter suction device comprises a cutter suction device 3, a negative pressure penetration barrel cover 4 and a negative pressure system;

the cutter suction device 3 consists of a reamer head 3-1, a rotary spraying sleeve 3-2, a drill rod 3-3 and a mud pipe 3-4; the reamer head 3-1 comprises a cutterhead 3-1-1 and reamer blades 3-1-2; the rotary spraying sleeve 3-2 is provided with a cement paste jet port 3-2-1, a high-pressure water jet port 3-2-2 and a mud suction port 3-2-3;

the negative pressure penetration barrel cover 4 comprises a top cover 4-1, a negative pressure hole 4-2, a fixing steel plate 4-3, a sealing opening 4-4 and a bolt 4-5;

the drag reduction barrel sleeve 2-1 is tightly connected to the outer side of the barrel-shaped foundation 1; the thixotropic slurry channel 2-2 is arranged in the barrel wall of the drag reduction barrel sleeve 2-1 and vertically penetrates through the drag reduction sleeve 2-1; the thixotropic slurry outlets 2-3 are uniformly distributed at the lower part of the drag reduction barrel sleeve 2-1 and are communicated with the thixotropic slurry channel 2-2 and the outside; the thixotropic slurry pipe 2-4 penetrates through the top cover 4-1, one end of the thixotropic slurry pipe is connected with the thixotropic slurry system, and the other end of the thixotropic slurry pipe is communicated with the thixotropic slurry channel 2-2; the thixotropic slurry system comprises a thixotropic slurry tank, a pressure pump and a control valve;

the reamer head 3-1 consists of a cutter head 3-1-1 and a reamer blade 3-1-2 and is connected to the lower end of the rotary spraying sleeve 3-2 through the cutter head 3-1-1; the reamer blade 3-1-2 is arranged at the bottom of the reamer head 3-1 and is connected with the cutterhead 3-1-1; the rotary spraying sleeve 3-2 is connected to the lower end of the drill rod 3-3, and a cement slurry jet orifice 3-2-1, a high-pressure water jet orifice 3-2-2 and a mud suction port 3-2-3 are arranged on the rotary spraying sleeve 3-2; the cement slurry jet ports 3-2-1 are distributed on two sides of the outer wall of the rotary spraying sleeve 3-2; the high-pressure water jet orifice 3-2-2 is arranged below the cement slurry jet orifice 3-2-1; the mud suction port 3-2-3 is arranged on the bottom end face of the drill rod, penetrates through the drill rod 3-3, the rotary spraying sleeve 3-2 and the cutter head 3-1-1, and is communicated with the mud discharge pipe 3-4; the mud discharging pipe 3-4 is arranged at the top end of the top cover 4-1, one end of the mud discharging pipe is connected with the drill rod 3-3, and the other end of the mud discharging pipe is connected with a mud discharging system; the drill rod 3-3 penetrates through the sealing port 4-4 to be connected with the mud pipe 3-4;

the top cover 4-1 is hermetically arranged at the top of the barrel-shaped foundation 1; the top cover 4-1 is provided with a negative pressure hole 4-2 and a sealing port 4-4; the negative pressure hole 4-2 is connected with a negative pressure system; the fixed steel plate 4-3 is fixedly connected to the top cover 4-1 through a plurality of bolts 4-5; the sealing opening 4-4 is used for sealing connection of the drill rod 3-3, the top cover 4-1 and the fixed steel plate 4-3.

The barrel-shaped foundation 1 is a steel barrel or an airtight concrete barrel; the top cover 4-1 is made of steel; the fixed steel plate 4-3 is arranged in the center of the top cover 4-1 and can reinforce the sealing opening 4-4; the inner diameter of the sealing opening 4-4 is the same as the outer diameter of the drill rod 3-3, a rubber sealing material is arranged inside the sealing opening 4-4, and a fixing buckle is arranged to enable the drill rod 3-3 to be fixed at a set height.

The anti-drag barrel sleeve 2-1 is preferably tightly connected with the barrel-shaped foundation 1 through a split bolt; the strength of the drag reduction barrel sleeve 2-1 is required to meet the requirements of penetration and pressurized passing of thixotropic slurry; the top cover 4-1 is hermetically connected with the barrel-shaped foundation 1; the thixotropic slurry channels 2-2 are uniformly distributed in the drag reduction barrel sleeve 2-1 along the circumferential direction of the outer wall of the barrel-shaped foundation 1; the thixotropic slurry outlets 2-3 are uniformly distributed at the soil-entering part of the drag reduction barrel sleeve 2-1, and a soil pressure sensor is arranged near the thixotropic slurry outlet 2-3; a pressure valve is arranged on the thixotropic slurry pipe 2-4, and is opened when the soil pressure monitored by the soil pressure sensor reaches a set value, and thixotropic slurry is injected into the contact surface between the resistance-reducing barrel sleeve 2-1 and the soil body; the number of the thixotropic slurry channels 2-2 and the thixotropic slurry outlets 2-3 is determined by the soil mass property, the size of the barrel-shaped foundation and the weight.

The strength of the reamer head 3-1 meets the requirement of cutting the block stone; a cement slurry channel, a high-pressure water channel, a mud discharging channel and a wire channel are arranged in the drill rod 3-3; the cement slurry channel, the high-pressure water channel and the sludge discharge channel are respectively connected with a cement slurry jet orifice 3-2-1, a high-pressure water jet orifice 3-2-2 and a sludge suction port 3-2-3; the rotary spraying sleeve 3-2 and the cutter head 3-1-1 can respectively and independently rotate.

The embodiment of the invention provides a hinged suction type penetration installation method of a barrel-shaped foundation with a drag reduction system, which comprises the following steps:

s1, as shown in a figure 2 (a), a barrel-shaped foundation 1 with a resistance-reducing barrel sleeve 2-1 is hoisted to a region to be installed, and a negative pressure sinking barrel cover 4 with a twisting and sucking device 3 is installed;

connecting the negative pressure hole 4-2 with a negative pressure system; connecting the sludge discharge pipe 3-4 with a sludge discharge system; the thixotropic slurry system is communicated with the thixotropic slurry channel 2-2 through a thixotropic slurry pipe 2-4;

the drill rod 3-3 is lowered until the bottom surface of the reamer head 3-1 is level with the bottom surface elevation of the barrel-shaped foundation 1;

s2, after the barrel-shaped foundation 1 uniformly sinks under the action of self weight and stops, opening a negative pressure hole 4-2 and a sludge suction port 3-2-3, and starting a negative pressure system, a reamer head 3-1 in a twisting and sucking device 3 and a sludge discharge system to continuously sink and penetrate the barrel-shaped foundation 1;

when the reading of the soil pressure sensor near the outlet 2-3 with the thixotropic slurry reaches a set value, starting the thixotropic slurry system to assist the barrel-shaped foundation 1 to sink and penetrate;

s3, as shown in a figure 2 (b), after the barrel-shaped foundation 1 sinks through to a designed elevation, closing the negative pressure hole 4-2 and the mud suction port 3-2-3, stopping the negative pressure system, replacing thixotropic mud with a thixotropic mud curing agent, pressurizing the thixotropic mud by the thixotropic mud system, and curing the thixotropic mud in a gap between the anti-drag barrel sleeve 2-1 and a soil body through the thixotropic mud pipe 2-4, the thixotropic mud channel 2-2 and the thixotropic mud outlet 2-3;

the reamer head 3-1 and the mud discharge system continue to work, and the drill rod 3-3 continues to drill from top to bottom;

s4, stopping the reamer head 3-1 and the mud discharging system when the drill rod 3-3 drills to a specified height;

as shown in fig. 2 (c), the rotary spraying sleeve 3-2 and the high-pressure water jet 3-2-2 are started, and high-pressure water passes through a high-pressure water channel in the drill rod 3-3 and then is jetted out through the high-pressure water jet 3-2-2 to cut soil in an area to be reinforced at the bottom of the barrel-shaped foundation 1;

s5, as shown in a figure 2 (d), a cement paste jet port 3-2-1 is started to alternately operate with a high-pressure water jet port 3-2-2, cement paste passes through a cement paste channel in a drill pipe 3-3 and then is jetted through the cement paste jet port 3-2-1 at high pressure, and soil bodies in a high-pressure water cutting area are reinforced;

s6, as shown in a figure 2 (e), after the soil body at the bottom of the barrel-shaped foundation 1 is reinforced, the cement paste jet opening 3-2-1 and the high-pressure water jet opening 3-2-2 continue to alternately operate, and the soil body in the barrel-shaped foundation 1 is reinforced from bottom to top;

s7, as shown in a figure 2 (f), after soil body reinforcement inside the barrel-shaped foundation 1 is completed, closing the rotary spraying sleeve 3-2, the cement slurry jet orifice 3-2-1 and the high-pressure water jet orifice 3-2-2, and lifting the drill rod 3-3 until the top end of the rotary spraying sleeve 3-2 is flush with the bottom surface of the top cover 4-1;

s8, as shown in the figure 2 (g), after the connection between the negative pressure hole 4-2 and the negative pressure system is disconnected, the negative pressure hole 4-2 is opened to be connected with the atmosphere; opening the sludge suction port 3-2-3, starting the sludge discharge system, starting the rotary spraying sleeve 3-2 and the high-pressure water jet orifice 3-2-2 again, and cutting and discharging soil inside the barrel-shaped foundation 1; in the process that the high-pressure water jet orifice 3-2-2 jets out the soil body in the high-pressure water cutting barrel, the drill rod 3-3 is pushed from top to bottom, and the mud-water mixture is discharged through the mud suction port 3-2-3 and the mud discharge system;

s9, after the soil body in the barrel type foundation 1 is cleaned, closing the sludge suction port 3-2-3, and stopping the sludge discharge system, the rotary spraying sleeve 3-2 and the high-pressure water jet port 3-2-2; disconnecting the thixotropic slurry pipe 2-4 from the thixotropic slurry channel 2-2; disconnecting the sludge discharge pipe 3-4 from the sludge discharge system; and (4) removing the negative pressure penetration barrel cover 4 with the twisting and sucking device 3, and completing construction of the barrel type foundation 1 as shown in fig. 2 (f).

In one embodiment, in the step S2, the negative pressure system assists the penetration of the barrel-shaped foundation 1 by forming a pressure difference between the inside and the outside of the barrel-shaped foundation and by extracting soil and water in the barrel through the negative pressure hole 4-2; the cutter suction device 3 is used for rotatably cutting soil bodies in the barrel-shaped foundation 1 through the reamer head 3-1 and then assisting the barrel-shaped foundation 1 to sink and penetrate through in a mode of discharging soil water through the sludge suction port 3-2-3, the sludge discharge pipe 3-4 and the sludge discharge system; the reamer head 3-1 and the drill rod 3-3 of the cutter suction device 3 are rigid, so that a guiding effect is achieved, and the barrel-shaped foundation 1 is ensured to sink vertically;

the reading value of the soil pressure sensor is the minimum pressure value of the thixotropic slurry injected;

after the thixotropic slurry system is started, the thixotropic slurry is pressurized and injected into a gap between the resistance-reducing barrel sleeve 2-1 and a soil body through the thixotropic slurry pipe 2-4, the thixotropic slurry channel 2-2 and the thixotropic slurry outlet 2-3, so that the effect of reducing resistance and penetrating the barrel-shaped foundation 1 is achieved; the pressure value of the thixotropic slurry is determined by design calculation according to the soil property and the water and soil pressure;

in the steps S2 and S3, the reamer head 3-1 can cut the rock lumps in the broken soil.

In one embodiment, in the steps S4 and S5, during the process of cutting and reinforcing the soil body at the bottom of the barrel-shaped foundation 1, the drill rods 3-3 are slowly lifted from bottom to top; the independent operation time of the cement paste injection port 3-2-1 and the high-pressure water injection port 3-2-2 and the alternate operation time interval of the cement paste injection port 3-2-1 and the high-pressure water injection port 3-2-2 are strictly controlled, so that the barrel type foundation 1 is prevented from being disturbed.

In one embodiment, in the steps S6 and S7, the reinforcement height of the soil body inside the bucket foundation 1 is determined by calculating the internal and external seepage stability of the bucket foundation 1; in the step S8, after the soil body inside the barrel-shaped foundation 1 is cut, the inside of the barrel-shaped foundation 1 can still be cleaned through high-pressure water, and the generated sewage is discharged through a sludge suction port 3-2-3 and a sludge discharge system; in the step S4-S8, the pressure of the high-pressure water sprayed out by the high-pressure water spraying opening 3-2-2 and the pressure of the high-pressure cement slurry sprayed out by the cement slurry spraying opening 3-2-1 are dynamically adjusted according to design requirements; the high-pressure water pressure jetted by the high-pressure water jet orifice 3-2-2 meets the cutting requirement of the soil body in the area to be reinforced; the pressure of the high-pressure cement slurry jetted out by the cement slurry jet orifice 3-2-1 meets the requirement of soil body reinforcement of the area to be reinforced.

In an embodiment, in the step S9, after the construction of the bucket foundation 1 is completed, the internal bottom plate and the bucket wall of the bucket foundation may be reinforced according to engineering requirements, and internal equipment is installed.

The invention is suitable for the installation of the bucket foundation 1 in the water of the ocean, the river, the lake and the like, and is also suitable for the installation of the bucket foundation 1 in the land area with higher underground water level.

The above-described embodiments are intended to illustrate rather than limit the invention, and any modifications and variations of the present invention are within the spirit and scope of the appended claims.

Claims (10)

1. The utility model provides a take bucket type basis of drag reduction system which characterized in that: comprises a barrel-shaped foundation (1), a resistance reducing system (2) and a negative pressure penetration system with a twisting and sucking device;

the drag reduction system (2) comprises a drag reduction barrel sleeve (2-1) provided with a thixotropic slurry channel (2-2) and a thixotropic slurry outlet (2-3), a thixotropic slurry pipe (2-4) and a thixotropic slurry system; the drag reduction barrel sleeve (2-1) is tightly connected to the outer side of the barrel-shaped foundation (1); the thixotropic slurry channel (2-2) is arranged in the barrel wall of the drag reduction barrel sleeve (2-1), vertically penetrates through the drag reduction sleeve (2-1), and is communicated with the outside through a thixotropic slurry outlet (2-3); the thixotropic slurry outlets (2-3) are uniformly distributed at the lower part of the drag reduction barrel sleeve (2-1); one end of the thixotropic slurry pipe (2-4) is connected with the thixotropic slurry system, and the other end is communicated with the thixotropic slurry channel (2-2); the thixotropic slurry system comprises a thixotropic slurry tank, a pressure pump and a control valve;

the negative pressure penetration system with the cutter suction device comprises a cutter suction device (3), a negative pressure penetration barrel cover (4) and a negative pressure system;

the cutter suction device (3) consists of a reamer head (3-1), a rotary spraying sleeve (3-2), a drill rod (3-3) and a mud pipe (3-4); the reamer head (3-1) comprises a cutter head (3-1-1) provided with a reamer blade (3-1-2) and is used for cutting the rock lumps in the crushed soil; the cutter head (3-1-1) is arranged at the lower end of the rotary spraying sleeve (3-2); the rotary spraying sleeve (3-2) is provided with a cement paste jet orifice (3-2-1) and a high-pressure water jet orifice (3-2-2); the mud suction port (3-2-3) is arranged on the bottom end face of the drill rod (3-3), penetrates through the drill rod (3-3), the rotary spraying sleeve (3-2) and the cutter head (3-1-1), and is communicated with the mud discharge pipe (3-4); the rotary spraying sleeve (3-2) is arranged at the lower end of the drill rod (3-3), and the drill rod (3-3) penetrates through a sealing opening (4-4) of the negative pressure sinking barrel cover (4) to be connected with the mud pipe (3-4);

the negative pressure penetration barrel cover (4) comprises a top cover (4-1) provided with a negative pressure hole (4-2) and a sealing port (4-4) and a fixed steel plate (4-3); the top cover (4-1) is hermetically arranged at the top of the barrel-shaped foundation (1); the negative pressure hole (4-2) is connected with a negative pressure system; the sealing opening (4-4) is used for sealing connection of the drill rod (3-3), the top cover (4-1) and the fixed steel plate (4-3).

2. The bucket foundation with drag reduction system of claim 1, wherein the bucket foundation (1) is a steel bucket or an airtight concrete bucket; the top cover (4-1) is made of steel; the fixed steel plate (4-3) is arranged in the center of the top cover (4-1) and used for reinforcing the sealing port (4-4), and the fixed steel plate (4-3) is divided into an upper part and a lower part which are respectively arranged at the upper part and the lower part of the barrel cover; the inner diameter of the sealing opening (4-4) is the same as the outer diameter of the drill rod (3-3), a rubber sealing material is arranged in the sealing opening (4-4), and a fixing buckle is arranged to enable the drill rod (3-3) to be fixed at a set height.

3. The barrel foundation with the drag reduction system as claimed in claim 1, wherein the drag reduction barrel casing (2-1) is tightly connected with the barrel foundation (1) by using split bolts; the strength of the drag reduction barrel sleeve (2-1) meets the requirements of penetration and pressurized passing of thixotropic slurry; the top cover (4-1) is hermetically connected with the barrel-shaped foundation (1); the thixotropic slurry channels (2-2) are uniformly distributed in the drag reduction barrel sleeve (2-1) along the circumferential direction of the outer wall of the barrel-shaped foundation (1); the thixotropic slurry outlets (2-3) are uniformly distributed at the soil-entering part of the drag reduction barrel sleeve (2-1), and soil pressure sensors are arranged near the thixotropic slurry outlets (2-3); a pressure valve is arranged on the thixotropic slurry pipe (2-4), and is opened when the soil pressure monitored by a soil pressure sensor reaches a set value, and thixotropic slurry is injected into the contact surface between the resistance-reducing barrel sleeve (2-1) and a soil body; the number of the thixotropic slurry channels (2-2) and the thixotropic slurry outlets (2-3) is determined by the soil body property and the size and weight of the barrel-shaped foundation.

4. The bucket foundation with drag reduction system of claim 1, where the strength of the reamer head (3-1) meets the requirements for cutting stone; a cement slurry channel, a high-pressure water channel, a mud discharging channel and a wire channel are arranged in the drill rod (3-3); the cement slurry channel, the high-pressure water channel and the mud discharge channel are respectively connected with a cement slurry jet orifice (3-2-1), a high-pressure water jet orifice (3-2-2) and a mud suction port (3-2-3); the rotary spraying sleeve (3-2) and the cutter head (3-1-1) can respectively and independently rotate to work;

the cement paste jet ports (3-2-1) are distributed on two sides of the outer wall of the rotary spraying sleeve (3-2); the high-pressure water jet orifice (3-2-2) is arranged below the cement paste jet orifice (3-2-1).

5. A method of reaming suction sinking the foundation of a bucket with drag reduction system according to any of claims 1 to 4, characterized in that it comprises the following steps:

(S1) hoisting the barrel-shaped foundation (1) with the anti-drag barrel sleeve (2-1) to a region to be installed, and installing a negative pressure penetration barrel cover (4) with a twisting and sucking device (3);

connecting the negative pressure hole (4-2) with a negative pressure system; connecting the sludge discharge pipe (3-4) with a sludge discharge system; the thixotropic slurry system is communicated with the thixotropic slurry channel (2-2) through a thixotropic slurry pipe (2-4);

the drill rod (3-3) is lowered until the bottom surface of the reamer head (3-1) is level with the bottom surface elevation of the barrel-shaped foundation (1);

(S2) after the barrel-shaped foundation (1) uniformly sinks under the action of self weight and stops, opening a negative pressure hole (4-2) and a mud suction port (3-2-3), and starting a negative pressure system, a reamer head (3-1) in a twisting and sucking device (3) and a mud discharging system to continuously sink and penetrate the barrel-shaped foundation (1);

when the reading of a soil pressure sensor near the thixotropic slurry outlet (2-3) reaches a set value, starting a thixotropic slurry system to assist the barrel-shaped foundation (1) to sink and penetrate;

(S3) after the barrel-shaped foundation (1) sinks to reach the designed elevation, closing the negative pressure hole (4-2) and the sludge suction port (3-2-3), stopping the negative pressure system, replacing thixotropic slurry with a thixotropic slurry curing agent, pressurizing the thixotropic slurry system, and curing the thixotropic slurry in a gap between the anti-drag barrel sleeve (2-1) and a soil body through the thixotropic slurry pipe (2-4), the thixotropic slurry channel (2-2) and the thixotropic slurry outlet (2-3);

the reamer head (3-1) and the mud discharge system continue to work, and the drill rod (3-3) continues to drill from top to bottom;

(S4) stopping the reamer head (3-1) and the mud discharging system when the drill rod (3-3) drills to a specified height;

starting the rotary spraying sleeve (3-2) and the high-pressure water jet (3-2-2), and cutting the soil body of the region to be reinforced at the bottom of the barrel-shaped foundation (1) by spraying high-pressure water through the high-pressure water jet (3-2-2) after the high-pressure water passes through a high-pressure water channel in the drill rod (3-3);

(S5) starting a cement paste injection port (3-2-1), alternately operating with a high-pressure water injection port (3-2-2), and injecting the cement paste at high pressure through the cement paste injection port (3-2-1) after passing through a cement paste channel in the drill pipe (3-3) to reinforce the soil body in a high-pressure water cutting area;

(S6) after the soil body at the bottom of the barrel-shaped foundation (1) is reinforced, the cement paste jet orifice (3-2-1) and the high-pressure water jet orifice (3-2-2) continue to alternately operate, and the soil body in the barrel-shaped foundation (1) is reinforced from bottom to top;

(S7) after the soil body in the barrel-shaped foundation (1) is reinforced, closing the rotary spraying sleeve (3-2), the cement slurry jet orifice (3-2-1) and the high-pressure water jet orifice (3-2-2), and lifting the drill rod (3-3) until the top end of the rotary spraying sleeve (3-2) is flush with the bottom surface of the top cover (4-1);

(S8) after the negative pressure hole (4-2) is disconnected from the negative pressure system, opening the negative pressure hole (4-2) to connect the negative pressure hole with the atmosphere; opening a mud suction port (3-2-3), starting a mud discharging system, starting the rotary spraying sleeve (3-2) and the high-pressure water jet orifice (3-2-2) again, and cutting and discharging soil inside the barrel-shaped foundation (1); in the process that the high-pressure water jet orifice (3-2-2) jets out the soil body in the high-pressure water cutting barrel, the drill rod (3-3) is pushed from top to bottom, and the mud-water mixture is discharged through the mud suction port (3-2-3) and the mud discharge system;

(S9) after the soil body in the barrel-shaped foundation (1) is cleaned, closing the sludge suction port (3-2-3), and stopping the sludge discharge system, the rotary spraying sleeve (3-2) and the high-pressure water jet nozzle (3-2-2); disconnecting the thixotropic slurry pipe (2-4) from the thixotropic slurry channel (2-2); disconnecting the sludge discharge pipe (3-4) from the sludge discharge system; and (3) dismantling the negative pressure penetration barrel cover (4) with the twisting and sucking device (3) to complete the construction of the barrel type foundation (1).

6. The method of claim 5 for the hinge-suction penetration installation of a bucket foundation with drag reduction system, wherein: in the step (S2), the reamer head (3-1) and the drill rod (3-3) of the twisting and sucking device (3) are rigid, so that a guiding effect is achieved, and the barrel-shaped foundation (1) is ensured to sink vertically and penetrate downwards;

the reading value of the soil pressure sensor is the minimum pressure value of the thixotropic slurry injected;

after the thixotropic slurry system is started, the thixotropic slurry is pressurized and injected into a gap between the resistance-reducing barrel sleeve (2-1) and a soil body through a thixotropic slurry pipe (2-4), a thixotropic slurry channel (2-2) and a thixotropic slurry outlet (2-3) and is used for reducing resistance and penetrating the barrel-shaped foundation (1); the pressurizing value of the thixotropic slurry is determined according to the soil property and the water and soil pressure.

7. The hinge-suction penetration installation method of the barrel-shaped foundation with the drag reduction system according to claim 5, wherein in the steps (S4) and (S5), the drill rods (3-3) are slowly lifted from bottom to top in the process of cutting and reinforcing the soil at the bottom of the barrel-shaped foundation (1); the independent operation time of the cement paste jet opening (3-2-1) and the high-pressure water jet opening (3-2-2) and the alternate operation time interval of the cement paste jet opening (3-2-1) and the high-pressure water jet opening (3-2-2) are strictly controlled, and the barrel type foundation (1) is prevented from being disturbed.

8. The method for the hinge-suction penetration installation of the bucket foundation with the drag reduction system according to claim 5, wherein in the steps (S6) and (S7), the reinforcement height of the soil body inside the bucket foundation (1) is determined by the internal and external seepage stability of the bucket foundation (1).

9. The hinge-suction penetration installation method of the barrel foundation with the drag reduction system according to claim 5, wherein in the steps (S4) - (S8), the pressure of the high-pressure water jetted from the high-pressure water jet orifice (3-2-2) and the pressure of the high-pressure cement slurry jetted from the cement slurry jet orifice (3-2-1) are dynamically adjusted according to design requirements;

the high-pressure water pressure jetted by the high-pressure water jet orifice (3-2-2) meets the cutting requirement of the soil body in the area to be reinforced; the pressure of the high-pressure cement slurry jetted by the cement slurry jet orifice (3-2-1) is required to meet the soil body reinforcement requirement of the area to be reinforced.

10. The hinged suction type penetration installation method of the barrel-shaped foundation with the drag reduction system according to claim 5, characterized in that in the step (S9), after the construction of the barrel-shaped foundation (1) is completed, the internal bottom plate and the barrel wall of the barrel-shaped foundation are reinforced according to engineering requirements, and internal equipment is installed.

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