CN110258541A - A kind of reinforced soft soil ground structure and its reinforcement means - Google Patents

Abstract

The invention discloses a soft ground reinforcement structure and a reinforcement method thereof. The reinforcing structure is used for pipe piles bearing drainage, and is a compacting device located above the pipe piles and used for compacting soil to accelerate soil consolidation. The pipe pile includes a pipe tip for accelerating the speed of entering the soil, and a pipe body installed on the pipe tip and located above the pipe tip. The pipe body is provided with a transmission assembly and a barb assembly located below the transmission assembly. The transmission assembly drives the barb assembly to penetrate into the soil, increasing the contact area between the pipe pile and the soft soil foundation, and improving the pullout resistance of the pipe pile. The compaction device includes a column, and a compaction assembly movably installed on the column, and the vibration of the compaction assembly in the Z direction produces a compaction effect on the soil. The invention is specially aimed at the soft ground, and has good reinforcement effect, simple construction and low cost.

Description

Soft soil foundation reinforcement structure and reinforcement method thereof

technical field

The invention relates to the technical field of foundation treatment devices, in particular to a soft soil foundation reinforcement structure and a reinforcement method thereof.

Background technique

Soft soil refers to modern sediments deposited in still water or slowly flowing water environment, mainly composed of clay and accompanied by microbial action. Soft soil is a kind of fine-grained soil in soft plastic to flow plastic state, and its appearance is mainly gray. It is widely distributed, and most of them are distributed in places where water conservancy construction is concentrated, such as seaside, river beach, swamp and lake. Soft soil foundation is the foundation with mixed silt and silt as the main components. Because of its strong plasticity and softness, its bearing capacity will be relatively weak, which is the characteristic of soft soil foundation.

With the continuous development of my country's infrastructure construction, a large number of construction projects, road projects, hydraulic projects, etc. will be built on soft soil foundations. The soft soil foundation has the characteristics of large void ratio, high water content, and large settlement. The soft soil foundation is reinforced before construction. The quality of soft soil foundation treatment is the key to ensure the safe and efficient operation of the project after completion. The existing soft soil foundation treatment method is commonly used the surcharge method. The surcharge method requires a large amount of surcharge materials and a large number of mechanical equipment, which has the disadvantages of high cost, difficult construction, and large interference with the construction site. At the same time, the stability of the reinforced structure is not good. .

Contents of the invention

The invention discloses a soft soil foundation reinforcement structure, which comprises a pipe pile used for drainage bearing and a compacting device located above the pipe pile and used for compacting soil and accelerating soil consolidation.

The pipe pile includes a pipe tip for accelerating the speed of entering the soil, and a pipe body installed on the pipe tip and located above the pipe tip.

The compaction device includes a post, and a compaction assembly movably mounted on the post.

A preferred soft soil foundation reinforcement structure disclosed by the present invention is characterized in that: the pipe body includes an inner pipe, an outer pipe sleeved on the inner pipe and concentric with the inner pipe;

The upper end of the inner tube is provided with a transmission assembly, the transmission assembly includes a fixed plate installed on the inner tube, a connecting plate located below the fixed plate, which is threadedly connected with the fixed plate, and a transmission rod whose lower end is mounted on the connecting plate through a rolling bearing. guide rods on both sides of the transmission rod on the fixed plate, the lower ends of which are installed on the connecting plate;

The inner tube is provided with a barb assembly located below the transmission assembly and installed on the connecting plate. The barb assembly includes a parallelogram member hinged by four connecting rods, installed on the parallelogram member and located at the left and right ends of the parallelogram, The translation rod perpendicular to the horizontal plane is installed on the hinge point of the parallelogram member through the pin shaft and is located on the upper and lower sides of the parallelogram member, and the driving rod perpendicular to the horizontal plane.

The translation bar passes through the support seat and can move along the X direction in the support seat, and the support seat is installed on the inner tube; the support bar is installed on the translation bar, and the support bar is equipped with multiple , A barbed rod capable of moving along the X direction in the inner tube.

The driving rod passes through the guide seat and can move along the Z direction in the guide seat, and the guide seat is installed on the inner tube.

The barbed component increases the contact area between the pipe pile and the soft soil foundation, improves the pullout resistance of the pipe pile, and prevents the pipe pile from slipping out of the soft soil foundation.

A preferred soft soil foundation reinforcement structure disclosed by the present invention is characterized in that the outer pipe is a hollow structure blocked up and down, and the upper end of the outer pipe is provided with an exhaust port for pumping air, a drain port for pumping water, and a Port for pouring cement. The outer cylindrical surface of the outer tube is provided with a plurality of through holes A corresponding to the barbed rods along the Z direction; the inner cylindrical surface of the outer tube is provided with a plurality of through holes B corresponding to the barbed rods along the Z direction. A sealing film is arranged on the inner cylindrical surface of the tube, and the sealing film seals the through hole B. The sealing film can make the outer tube form a relatively sealed cavity, and also ensure that the barbed rod can penetrate the sealing film and enter the soil through the through hole A and the through hole B.

One end of the exhaust pipe is installed on the vacuum pump, and the other end is installed on the exhaust port. Vacuum the inside of the outer pipe by a vacuum pump to form a pressure difference between the soil and the outer pipe, so that the water in the soil layer penetrates into the outer pipe through the through hole A;

One end of the water suction pipe is installed on the water pump, and the other end is installed in the water suction port. The soft soil foundation water entering the outer pipe is continuously pumped out by the water pump, so that the soft soil foundation can be effectively reinforced.

A preferred soft soil foundation reinforcement structure disclosed by the present invention is characterized in that: the compaction assembly includes a main frame, a compaction plate located below the main frame and installed on the main frame; Isolation tank;

The drive motor located above the compaction plate and indirectly hinged with the main frame through the installation rod, the drive motor is a biaxial motor, the drive motor drives the power wheel to rotate, the angle between the two power wheels is 0° and during the movement Always synchronized; the springs are located on the left and right sides of the driving motor and are indirectly hinged with the motor and the main frame through the mounting block; the center angle of the power wheel is 180°.

Two power wheels with an included angle of 0° and a central angle of 180° rotate with the drive motor to form a centrifugal force, which drives the compaction assembly to generate vibration in the Z direction, thereby producing a compaction effect on the soil.

The invention also discloses a soft soil foundation reinforcement method, which includes the following steps:

S1: Press the pipe pile into the designated soil layer of the soft soil foundation through the piling equipment;

S2: Use a vacuum pump to pump out the air in the outer pipe to form a pressure difference, and the water in the soil layer penetrates into the pipe pile through the through hole A; the water pump discharges the water pouring into the outer pipe, which plays a preliminary role in strengthening the soft soil foundation;

S3: While S2 is working, the compaction plate continuously compacts the soil around the pipe pile to increase soil permeability, and cooperate with the pump to accelerate soil consolidation;

S4: When the water pumped out by the water pump is getting less and less, turn the transmission rod so that the transmission rod drives the connecting plate to move downward, the structure of the parallelogram member changes, the translation rod moves towards the direction of the outer pipe, and the barbed rod passes through the inner pipe. The pipe, through hole A, and through hole B extend into the soil; then pour cement into the pipe pile, and the inner pipe and outer pipe form a reinforced concrete structure through the barbed rod and cement. The strength, shear resistance, and stability of the pipe pile The performance and bearing capacity are greatly enhanced.

The invention overcomes the disadvantages of the prior art and provides a structure specially used for soft soil foundation reinforcement, which has good reinforcement effect, simple construction and low cost.

Description of drawings

Fig. 1 is a front view of the present invention;

Fig. 2 is a sectional view of the pipe pile of the present invention;

Fig. 3 is an enlarged view of part A in Fig. 2;

Fig. 4 is the top view of the pipe pile of the present invention;

Fig. 5 is the structural representation when the barbed rod of the present invention extends into the soil;

Fig. 6 is a cooperation diagram of the translation rod and the support seat of the present invention;

Fig. 7 is the matching diagram of the drive rod and the guide seat of the present invention;

Fig. 8 is a front view of the compacting assembly of the present invention;

Fig. 9 is a top view of the compacting assembly of the present invention.

The markings in the figure are as follows:

100-pipe pile, 101-pipe tip, 102-pipe body, 103-inner pipe, 104-outer pipe, 105-transmission assembly, 106-fixed plate, 107-connecting plate, 108-transmission rod, 109-guide rod, 110-barb assembly, 112-parallelogram member, 113-support rod, 114-drive rod, 115-barb rod, 116-guiding seat, 117-support seat, 118-through hole A, 119-through hole B, 120-chute A, 121-slider A, 122-slider B, 123-slider B, 124-exhaust port, 125-drainage port, 126-infusion port, 127-translation rod.

200-compaction device, 201-column, 202-compaction assembly, 203-main frame, 204-compaction plate, 205-isolation tank, 206-drive motor, 207-power wheel, 208-installation rod, 209-spring , 210 - mounting block.

300 - Vacuum pump. 400 - Suction pump. 500-exhaust pipe. 600 - Suction pipe.

Detailed ways

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

As shown in FIG. 1 , a soft soil foundation reinforcement structure includes a pipe pile 100 for drainage bearing, and a compacting device 200 located above the pipe pile 100 and used for compacting soil to accelerate soil consolidation.

As shown in Fig. 2, Fig. 4 and Fig. 5, the pipe pile 100 includes a pipe tip 101 for accelerating the speed of entering the soil, and a pipe body 102 installed on the pipe tip 101 and located above the pipe tip 101;

The tube body 102 includes an inner tube 103 and an outer tube 104 sleeved on the inner tube 103 and concentric with the inner tube 103 .

The upper end of the inner tube 103 is provided with a transmission assembly 105, the transmission assembly 105 includes a transmission assembly 106 mounted on the inner tube, a connecting plate 107 located below the transmission assembly 106, which is threadedly connected with the transmission assembly 106, and the lower end is mounted on the connecting plate 107 through a rolling bearing The transmission rod 108 is movable and installed on the transmission assembly 106 and the lower end is installed on the connecting plate 107 , and the guide rods 109 located on both sides of the transmission rod 108 .

The inner tube 103 is provided with a barb assembly 110 located below the transmission assembly 105 and installed on the connecting plate 107. The barb assembly 110 is made of steel. The barb assembly 110 includes a parallelogram member 112 hinged by four connecting rods. , the translation rod 127 installed on the parallelogram member 112 and located at the left and right ends of the parallelogram and perpendicular to the horizontal plane is installed on the hinge point of the parallelogram member 112 and located on the upper and lower sides of the parallelogram member 112 through a pin shaft, and is driven vertically to the horizontal plane Rod 114.

As shown in Figure 6, the translation rod 127 is provided with a plurality of chute A120 axially distributed around the central axis of the translation rod 127, and the support seat 117 is provided with a slider A121 that cooperates with the chute A120, and the slider A121 is inserted into the chute A120, the translation rod 127 passes through the support base 117 and can move in the X direction, and the support base 117 is installed on the inner tube 103;

The installation rod 208 is mounted on the translation rod 127, and a plurality of barb rods 115 are installed on the installation rod 208, which are uniformly arranged along the Z direction and pass through the inner tube 103, and can move along the X direction in the inner tube 103.

As shown in Figure 7, the drive rod 114 is provided with a plurality of chute B122 axially distributed around the central axis of the drive rod 114, the guide seat 116 is provided with a slider B123 that cooperates with the chute B122, and the slider B123 is inserted into the slider Slot B122 , the driving rod 114 passes through the guide seat 116 and can move in the Z direction, and the guide seat 116 is installed on the inner tube 103 .

The barb assembly 110 increases the contact area between the pipe pile 100 and the soft soil foundation, improves the pullout resistance of the pipe pile 100, and prevents the pipe pile 100 from slipping out of the soft soil foundation. Utilize the transmission assembly 105 to provide the power for the movement of the barb assembly 110, turn the transmission rod 108, the transmission rod 108 drives the connecting plate 107 to move in the Z direction, and the two drive rods 114 move in the opposite direction in the Z direction, so that the parallelogram structure changes, The barbed rod 115 is driven to reversely move in the X direction to complete the action of the barbed rod 115 penetrating into the soil.

As shown in Fig. 2, Fig. 3, Fig. 4, and Fig. 5, the outer pipe 104 is a hollow structure blocked up and down, and the upper end of the outer pipe 104 is provided with an exhaust port 124 for pumping air, and a drain port 125 for pumping water. In pouring port 126 of pouring cement. The outer cylindrical surface of the outer tube 104 is provided with a plurality of through holes A118 corresponding to the barb rods 115 along the Z direction; For the through hole B119, a sealing film is arranged on the inner cylindrical surface of the outer tube 104, and the sealing film seals the through hole B119. Through the sealing film, the outer tube 104 can form a relatively sealed cavity, and also ensure that the barbed rod 115 can penetrate the sealing film and enter the soil through the through hole A118 and the through hole B119.

One end of the exhaust pipe 500 is installed on the vacuum pump 300 , and the other end penetrates into the outer pipe 104 . Vacuum the inside of the outer pipe 104 through the vacuum pump 300 to form a pressure difference between the soil and the outer pipe 104, so that the water in the soil layer penetrates into the outer pipe 1041 through the through hole A118;

One end of the suction pipe 600 is installed on the water pump 400 , and the other end penetrates into the outer pipe 104 . The soft soil foundation water entering the outer pipe 104 is continuously pumped out by the water pump 400, so that the soft soil foundation is effectively reinforced.

As shown in FIG. 8 and FIG. 9 , the compacting device 200 includes a column 201 on which slide rails are mounted, and both ends of the compaction assembly 202 are mounted on the slide rails.

The compacting assembly 202 includes a main frame 203, a compacting plate 204 located below the main frame 203 and installed on the main frame 203; an isolation groove 205 is provided at the center of the lower end surface of the compacting plate 204; the compacting plate 204 compacts the soil When the pipe pile 100 is located in the isolation groove 205, the damage to the pipe pile 100 caused by the compaction plate 204 is avoided, and the stress of the compaction plate 204 is ensured to be concentrated on the soil, thereby effectively compacting the soil.

The drive motor 206 is located above the compaction plate 204 and is indirectly hinged with the main frame 203 through the mounting rod 208. The drive motor 206 is a biaxial motor, and the drive motor 206 drives the power wheel 207 to rotate. The angle between the two power wheels 207 is 0° and always synchronized during the movement; the spring 209 is located on the left and right sides of the driving motor 206 and is indirectly hinged with the motor and the main frame 203 through the mounting block 210; the central angle of the power wheel 207 is 180°.

The two power wheels 207 with an included angle of 0° and a central angle of 180° rotate with the drive motor 206 to form a centrifugal force, which drives the compaction assembly 202 to generate vibration in the Z direction, thereby producing a compaction effect on the soil.

The Z-direction stress will be generated in the soil body through the compaction component 202, and the compaction component 202 is used to repeatedly compress the surface of the soil layer to generate impact energy in the soft soil foundation, forming dynamic stress, and at the same time, the compaction component 202 rubs against the soil layer , frictional heat is generated during the movement of soil particles, and part of the impact energy is converted into heat energy, which accelerates the release of gas in the soft soil foundation, reduces the volume of the soil, reduces the resistance of pore water movement, increases the permeability of the soil, and cooperates with pumping The water pump 400 accelerates soil consolidation.

The disclosed reinforcement method of the present invention, the steps are as follows:

S1: Press the pipe pile into the designated soil layer of the soft soil foundation through the piling equipment;

S2: Use a vacuum pump to pump out the air in the outer pipe to form a pressure difference, and the water in the soil layer penetrates into the pipe pile through the through hole A; the water pump discharges the water pouring into the outer pipe, which plays a preliminary role in strengthening the soft soil foundation;

S3: While S2 is working, the compaction plate continuously compacts the soil around the pipe pile to increase soil permeability, and cooperate with the pump to accelerate soil consolidation;

S4: When the water pumped out by the water pump is getting less and less, turn the transmission rod so that the transmission rod drives the connecting plate to move downward, the structure of the parallelogram member changes, the translation rod moves towards the direction of the outer pipe, and the barbed rod passes through the inner pipe. The pipe, through hole A, and through hole B extend into the soil; then pour cement into the pipe pile, and the inner pipe and outer pipe form a reinforced concrete structure through the barbed rod and cement. The strength, shear resistance, and stability of the pipe pile The performance and bearing capacity are greatly enhanced.

Many other changes and modifications can be made without departing from the spirit and scope of the present invention. It should be understood that the invention is not limited to the particular embodiments, but that the scope of the invention is defined by the appended claims.

Claims (6)

1. a kind of reinforced soft soil ground structure, it is characterised in that: including the tubular pole (100) for draining carrying, be located at tubular pole (100) top and the compaction apparatus (200) for compacted fill acceleration soil solidifying；

Tubular pole (100) includes for accelerating into the tip of soil body speed (101), being mounted on tip (101) and being located at tip (101) tube body (102) above；

Compaction apparatus (200) includes column (201), removably mounts within the compacting component (202) on column (201).

2. a kind of reinforced soft soil ground structure as described in claim 1, it is characterised in that: the tube body (102) includes inner tube (103), it is set in the outer tube (104) concentric on inner tube (103) and with inner tube (103)；

Inner tube (103) upper end is provided with transmission component (105), and transmission component (105) includes the fixed plate of installation on the inner cylinder (106), the connecting plate (107) being located at below fixed plate (106), is threadedly coupled, lower end passes through rolling bearing with fixed plate (106) The drive rod (108) being mounted on connecting plate (107), it is mobile to be mounted on fixed plate (106) and lower end is mounted on connecting plate (107) guide rod (109) on, positioned at drive rod (108) two sides；

The hangnail component below transmission component (105) and being mounted on connecting plate (107) is provided in inner tube (103) (110), hangnail component (110) include as four connecting rods it is hinged made of parallelogram component (112), be mounted on parallel four side On shape component (112) and it is located at parallelogram left and right ends, the translation bar (127) with horizontal plane, is installed by pin shaft Parallelogram component (112) hinge joint and be located at parallelogram component (112) up and down two sides, with the drive of horizontal plane Lever (114)；

Translation bar (127) passes through support base (117) and can move in X direction in support base (117), support base (117) installation On inner tube (103)；Mounting rod (208) is mounted in translation bar (127), is equipped on mounting rod (208) multiple equal along Z-direction Even setting and the hangnail bar (115) that passes through inner tube (103), can be moved in X direction in inner tube (103)；

Drive rod (114) passes through guide holder (116) and can move in guide holder (116) along Z-direction, guide holder (116) installation On inner tube (103).

3. a kind of reinforced soft soil ground structure as claimed in claim 2, it is characterised in that: the outer tube (104) is to seal up and down Stifled hollow structure, outer tube (104) upper end be provided with the exhaust outlet (124) for pumping, the discharge outlet (125) for drawing water, For pouring the perfusing hole (126) of cement；

Z-direction is provided with multiple and hangnail bar (115) one-to-one through-hole A (118) on outer tube (104) external cylindrical surface；Outside Z-direction is provided with multiple and hangnail bar (115) one-to-one through-hole B (119), outer tube (104) on pipe (104) inner cylinder face Sealing film is provided on inner cylinder face, sealing film blocks through-hole B (119).

4. a kind of reinforced soft soil ground structure as claimed in claim 3, it is characterised in that: exhaust tube (500) one end peace On vacuum pump (300), the other end is mounted on bleeding point；

Drinking-water pipe (600) one end is mounted on suction pump (400), and the other end is mounted in pump mouth.

5. a kind of reinforced soft soil ground structure as described in claim 1, it is characterised in that: the compacting component (202) includes Body frame (203) is located at the squeeze board (204) below body frame (203) and being mounted on body frame (203)；Squeeze board (204) lower end surface Center position is equipped with isolation channel (205)；

Above the squeeze board (204) and pass through the mounting rod driving motor (206) hinged with body frame (203) indirectly, driving Motor (206) is dual-axle motor, and driving motor (206) drives power wheel (207) rotation, the folder between two power wheels (207) Angle is 0 ° and synchronizes always during the motion；Spring (209) is located at left and right sides of driving motor (206) and passes through mounting blocks (210) indirectly hinged with motor, body frame (203)；Power wheel (207) institute is 180 ° to central angle.

6. a kind of method using ruggedized construction reinforcing soft ground as described in claim 1: the following steps are included: S1: logical It crosses pile driving equipment tubular pole (100) is pressed into the specified soil layer of soft soil foundation；

S2: the air in outer tube (104) is extracted out using vacuum pump (300), forms pressure difference, the water in soil layer passes through through-hole A (118) it penetrates into tubular pole (100)；Suction pump (400) will pour in the discharge of the water in outer tube (104)；

S3: while S2 work, squeeze board (204) is constantly compacted the soil body around tubular pole (100), cooperates suction pump (400) accelerate soil solidifying；

S4: when the water that suction pump (400) is released is fewer and fewer, rotating drive rod (108), drives drive rod (108) and connects Fishplate bar (107) moves downward, and parallelogram component (112) structure changes, and translation bar (127) is to close to outer tube (104) Direction movement, hangnail bar (115) protrude into the soil body across inner tube (103), through-hole A (118), through-hole B (119)；Then to tubular pole (100) interior cement injection.