WO2021135156A1

WO2021135156A1 - Construction apparatus for deep stirring by using curing material and construction method therefor

Info

Publication number: WO2021135156A1
Application number: PCT/CN2020/101638
Authority: WO
Inventors: 宋伟杰; 李建平; 宋德君; 朱庆凯; 王伟涛; 刘光磊; 武思宇
Original assignee: 北京中岩大地科技股份有限公司
Priority date: 2019-12-29
Filing date: 2020-07-13
Publication date: 2021-07-08
Also published as: CN110847147A

Abstract

Disclosed are a construction apparatus for deep stirring by using a curing material and a construction method therefor, which belong to the technical field of construction in foundation engineering. The construction apparatus comprises a drilling machine, a drill rod, a drill bit, a power head, a booster pump, a drag reduction material box, a water tank, a curing material supply bin, an air compressor, a conveying apparatus, angle steel, a first channel, a second channel, a converter, a sliding groove and a fixing bolt, wherein the drill rod is internally provided with the first channel and the second channel, the angle steel is welded on the drill rod, and the length of the angle steel is equal to that of the drill rod; and the drag reduction material box, the water tank, the booster pump, the first channel, the air compressor, the material supply bin, etc., are connected by means of high-pressure rubber pipes. According to the present invention, by means of the action of a drag reduction material, stirring resistance is obviously reduced; by means of arrangement of nozzles with different pore diameters, automatic conversion is carried out in drill feeding and drill lifting processes, and automatic conversion of slurry in different construction stages can be achieved; and air pressure caused in the construction process can be effectively reduced by means of arranging angle steel.

Description

Construction equipment using solidified materials for deep mixing and construction method thereof

Technical field

The invention belongs to the technical field of construction in basic engineering, and specifically relates to a construction equipment that uses solidified materials for deep mixing and a construction method thereof.

Background technique

DJM pile is a method of using compressed air to transport powder solidified material, and mixing the solidified material with soft soil through mixing blades to form a cement-soil pile to strengthen the soft soil foundation. Since this method was invented by Swedish engineer Kjeld pans in 1967, it has been widely used in various soft soil foundation reinforcement projects at home and abroad, such as railways, highways, municipal engineering, ports and wharfs. Since the introduction of this method in my country in the late 1970s, it has also been popularized and applied in railway, highway, industrial and civil engineering.

A large number of engineering practices have shown that the powder jet pile method has the advantages of simple construction, rapid construction, and low vibration, which can effectively improve the stability of soft soil foundations and reduce and control settlement. However, the powder jet pile is expensive and the deep treatment effect is not good (the effective reinforcement depth is generally less than 15m), which limits the large number of applications of this method. On the other hand, unexpected problems often occur during the construction process, such as:

(1) When there is an empty surface, the construction of dry jet mixing pile will cause slope instability;

(2) Construction near existing structures will cause ground cracks and damage to structures, etc.;

(3) The powder sprayed pile will suddenly sink after construction.

In fact, these phenomena are not accidental. They are all related to a short-term lateral pressure generated during the construction of dry jetted piles, which leads to an increase in the surrounding pore water pressure. The main sources are: (1) The compressed air during dry jetted pile construction The lateral pressure exerted by the surrounding soil; (2) The shear force exerted by the stirring blade on the surrounding soil during stirring.

Therefore, in order to reduce the negative effects of the powder jet pile construction, the present invention proposes a construction equipment and a construction method using solidified materials for deep mixing.

Technical solutions

In view of the above-mentioned technical problems in the prior art, the present invention proposes a construction equipment and a construction method using solidified materials for deep mixing, which overcomes the shortcomings of the prior art. Through the action of resistance reducing materials, the mixing resistance of deep mixing piles in deeper formations is significantly reduced; by setting nozzles with different diameters, and automatically changing the nozzles during drilling and lifting, it can solve the types of slurry in different construction stages It is difficult to change the difficult problem. By setting the angle steel, the air pressure caused during the construction process is effectively reduced, and the disturbance to the surrounding soil is reduced.

In order to achieve the above objectives, the present invention adopts the following technical solutions:

A construction equipment that uses solidified materials for deep mixing, which is characterized in that it includes a drill, a drill rod, a drill bit, a power head, a booster pump, a resistance-reducing material tank, a water tank, a material supply warehouse, an air compressor, a transmission device, and an angle steel. , No. 1 passage, No. 2 passage, converter, chute, fixing bolt; The drill pipe is a hollow round pipe, and the inside of the drill pipe is provided with No. 1 and No. 2 passages. When the two pipes are distributed inside the power head drill The central axis of the No. 2 channel coincides with the central axis of the drill pipe section. The No. 1 channel is located on the side of the No. 2 channel. When the two pipes enter the drill pipe, the No. 2 channel and the No. 1 channel have a certain angle of bend. The center of gravity of the drill pipe coincides with the center axis of the drill pipe; the two angle steels are symmetrically distributed along the center of the drill pipe, and the angle steel is welded on the drill pipe, and the length of the angle steel is the same as the length of the drill pipe; the resistance reducing material box Both the air compressor and the water tank are connected to the booster pump through a high-pressure hose, the booster pump is connected to channel 1 through a high-pressure hose, the air compressor is connected to the material supply bin through a high-pressure hose, and the material supply bin is connected to channel 2 through a high-pressure hose. The conveying equipment is connected with the material supply warehouse to convey materials; the materials are conveyed to the drill bit through the No. 1 channel and the No. 2 channel for construction work.

Preferably, the converter is provided with three spouts and chutes, and a fixing bolt is provided at the drill rod corresponding to the chute. The converter is fixed by the fixing bolt, and the steering of the drill rod can be adjusted by drilling down and lifting the drill. The opening and closing status of the nozzles, the three nozzles are divided into small nozzles, No. 1 large nozzles, and No. 2 large nozzles. The small nozzles and No. 1 large nozzles are symmetrically distributed about the center of the converter section, and are set near the blade of the drill bit, No. 2 The large nozzle is in the same vertical plane as the No. 1 large nozzle, and the No. 2 large nozzle is set at the blade away from the drill bit; there are four chutes in total, and the chutes are symmetrically distributed about the center of the converter, and each chute occupies the entire conversion 1/8 of the circumference of the device, the width of the chute is 0.5-2.0cm, and the depth is 2.0-5.0cm, and the speed range of the fixing bolt moving along the chute is 0.01-0.1rad/s.

Preferably, the side length of the angle steel is in the range of 80-140mm, and the thickness is in the range of 8-14mm; the drill rod is a double tube, the diameter of the drill rod is 200-300mm, and the wall thickness is 8-12mm.

Preferably, the No. 1 channel is parallel to the No. 2 channel, and the distance between the axes of the two is 30mm-300mm, the fluid conveyed in the No. 1 channel is a fluid plastic liquid, and the conveyed in the No. 2 channel is a powdery solid. The No. 2 passage is 1.5-2.0 times the diameter of the No. 1 passage, and the bending angle of the No. 2 passage and the No. 1 passage is in the range of 10°-80°.

Preferably, the small nozzles are arranged on the front side of the blade, and the diameters of the nozzles are in the range of 3-5 mm, and the diameters of the No. 1 large nozzle and the No. 2 large nozzle are both 5-8 mm, which are both distributed on the back side of the blade.

Preferably, the conveying equipment includes a conveyor belt, a protective cover, one end of the conveyor belt is close to the ground for loading the solidified material, the other end of the conveyor belt is fixed at the feed inlet of the upper part of the material supply bin, the conveyor belt is provided with a protective cover, and the cross section of the protective cover is half. Round shape, forming a closed channel together with the conveyor belt.

A construction method for construction equipment using solidified materials for deep mixing, characterized in that the construction equipment using solidified materials for deep mixing according to claim 1 is used for construction according to the following method:

Step 1: Check the safety of the equipment, assemble and test the machine;

Step 2: Reinforce the foundation for placing the machine body, keep the mixer shaft vertical, adjust the pile machine leg cylinder so that the drill rod of the drill rig is at a 90-degree angle with the horizontal plane, and the inclination angle error is not more than 0.5%;

Step 3: Load the resistance-reducing material into the storage box, turn on the motor and use the external stirring drill rod to drive the external stirring blade to stir the resistance-reducing material at a speed of 100r/min-2000r/min, continuous stirring for 3-10min, after an interval of 1-5min Reverse stirring for 3-10min;

Step 4: Pour water into the water tank, turn on the booster pump, control the concentration of the resistance-reducing material at 0-5%, and deliver it to channel 1 through the high-pressure hose. The injection pressure of the resistance-reducing material is in the range of 0.01-1.0MPa;

Step 5: The solidified material is delivered to the No. 2 channel through the high air pressure of the air press, and the pressure of the air press is 0.1-5.0 MPa;

Step 6: Turn on the drilling rig, rotate forward, pre-stir and sink, control the drilling speed at 0.5m/min~3.0m/min, and control the drilling speed at 5r/min~50r/min. Observe the pressure gauge on the booster pump and air pressure machine Readings, as the drill pipe is drilled, the booster pump gradually increases with a gradient of 0.01MPa-0.1MPa, while the air compressor gradually increases with a gradient of 0.01MPa-0.1MPa;

Step 7: As the drill pipe rotates clockwise, the fixing bolt moves along the chute. When it moves to the end of the chute, the small nozzle on the converter and the large nozzle No. 1 are connected to the drill pipe. At the same time, 2 No. large spout is closed;

Step 8: When the drilling is close to the design depth, apply low-speed slow-rotation drilling, and the drill rig rotates in situ for 1-2 minutes. When the drill reaches the design depth, reverse rotation, that is, rotate counterclockwise and raise the drill bit at a speed of 0.2~ 2.0m/min, the control speed is 5r/min~30r/min, and the injection pressure is controlled at 0.2~5MPa. At this time, the fixing bolt moves along the chute. When it moves to the end of the chute, No. 2 on the converter The large nozzle is connected to the drill pipe, and at the same time, the small nozzle and No. 1 large nozzle are closed;

Step 9: After raising to the design elevation, stir on the spot for 1-5 minutes; raise the drill bit above the ground, turn off the air compressor and booster pump, and the construction is completed.

Preferably, the material is a powder curing agent such as cement or fly ash, the cement is ordinary Portland cement, the strength grade is 42.5, the cement content ranges from 8-30%, and the particle size ranges from 1-60 μm.

Beneficial effect

The beneficial technical effects brought by the present invention:

(1) Through the action of the resistance reducing material, the mixing resistance of the deep mixing pile in the deeper stratum is obviously reduced; (2) By setting up nozzles with different diameters, and automatically changing the nozzles during the drilling and lifting process, it can be solved The difficulty of changing the type of grout in different construction stages is difficult; (3) By installing angle steel, the air pressure caused during the construction process is effectively reduced, and the disturbance to the surrounding soil is lower.

Description of the drawings

Figure 1 is a schematic structural diagram of a construction equipment using solidified materials for deep mixing of the present invention.

Figure 2 is a schematic diagram of the structure of a drill bit in a construction equipment using solidified materials for deep mixing of the present invention.

Fig. 3 is a schematic diagram of the structure of No. 1 channel in a construction equipment using solidified materials for deep mixing according to the present invention.

Fig. 4 is a schematic cross-sectional view of a drill rod in a construction equipment using solidified materials for deep mixing according to the present invention.

Fig. 5 is a schematic diagram of the structure of the converter in the drilling process of a construction equipment using solidified materials for deep mixing according to the present invention.

Fig. 6 is a schematic diagram of the structure of the converter during the drilling process of a construction equipment that uses solidified materials for deep mixing according to the present invention.

Among them, 1-drilling rig; 2-drill rod; 3-drill bit; 4-power head; 5-booster pump; 6-resistance-reducing material tank; 7-water tank; 8-material supply warehouse; 9-air compressor; 10 -Transfer equipment; 11-angle steel; 12-1 channel; 13-2 channel; 14-converter; 15-chute; 16-fixing bolt.

Embodiments of the present invention

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

Example 1:

The construction method of the present invention is used to treat the soil of the contaminated site. The agent used for soil treatment is a powder agent. The specific test process is as follows:

As shown in Figure 1-6, a construction equipment that uses solidified materials for deep mixing is characterized in that it includes a drill 1, a drill rod 2, a drill bit 3, a power head 4, a booster pump 5, a resistance reducing material box 6, Water tank 7, material supply warehouse 8, air compressor 9, conveying equipment 10, angle steel 11, channel 1 12, channel 2 13, converter 14, chute 15, fixing bolt 16; the drill rod 2 is a hollow circle Pipe, the drill pipe 2 is provided with No. 1 passage 12 and No. 2 passage 13. When the two pipes are distributed in the drill pipe inside the power head 4, the central axis of the No. 2 passage 13 coincides with the central axis of the drill pipe, 1 Passage 12 is located on the side of Passage 2 13. When the two pipes enter the drill pipe 2, Passage 2 13 and Passage 1 12 are bent at a certain angle, and the center of gravity of the drill pipe 2 coincides with the center axis of the drill pipe 2; There are two angle steels 11, which are symmetrically distributed along the center of the drill pipe 2. The angle steel 11 is welded to the drill pipe 2, and the length of the angle steel 11 is the same as that of the drill pipe 2. The resistance-reducing material tank 6 and the water tank 7 are both passed through high pressure The hose is connected to the booster pump 5, and the booster pump 5 is connected to the No. 1 channel 12 through a high-pressure hose. The air compressor 9 is connected to the material supply bin 8 by a high-pressure hose, and the material supply bin 8 is connected to the No. 2 channel 13 through the high-pressure hose. In connection, the conveying device 10 is connected to the material supply warehouse 8 to convey materials; the material is conveyed to the drill bit 3 through the No. 1 channel 12 and the No. 2 channel 13 for construction work.

Preferably, the converter 14 is provided with three spouts and chutes 15, and a fixing bolt 16 is provided at the drill rod 2 corresponding to the chute 15. The converter 14 is fixed by the fixing bolt 16, which can be drilled down and lifted. When drilling, the rotation of the drill rod 2 adjusts the opening and closing of the nozzles. The three nozzles are divided into small nozzles, No. 1 large nozzles, and No. 2 large nozzles. The small nozzles and No. 1 large nozzles are symmetrically distributed with respect to the center of the converter 14 section. At the blade close to the drill bit 3, the No. 2 large nozzle is in the same vertical plane as the No. 1 large nozzle, and the No. 2 large nozzle is set at the blade far from the drill bit 3. There are four chutes 15 in total, and the chute 15 is about The converter 14 is symmetrically distributed in the center, and each chute 15 occupies 1/8 of the circumference of the entire converter 14. The width of the chute 15 is 1.0 cm, and the depth is 3.0 cm. The fixing bolt 16 moves along the chute 15 The speed range is 0.05rad/s.

Preferably, the side length of the angle steel 11 is in the range of 100 mm and the thickness is in the range of 10 mm; the drill rod 2 is a double tube, the diameter of the drill rod 2 is 250 mm, and the wall thickness is 10 mm.

Preferably, the No. 1 channel 12 and the No. 2 channel 13 are parallel, and the distance between the axes of the two is 30mm-300mm. The No. 1 channel 12 conveys a fluid plastic liquid, and the No. 2 channel 13 conveys It is a powdery solid, the No. 2 passage 13 is 1.5 times the diameter of the No. 1 passage 12, and the bending angle range of the No. 2 passage 13 and the No. 1 passage 12 is 60°.

Preferably, the small nozzles are arranged on the front side of the blade, the diameter of the nozzles is in the range of 4 mm, and the diameter of the No. 1 large nozzle and the No. 2 large nozzle are both 7 mm, both of which are distributed on the back side of the blade.

Preferably, the conveying equipment 10 includes a conveyor belt and a protective cover. One end of the conveyor belt is close to the ground for loading solidified materials, the other end of the conveyor belt is fixed at the upper part of the material supply bin 8 at the feed inlet, and a protective cover is provided on the conveyor belt. The cross section of the protective cover It is semicircular and forms a closed channel with the conveyor belt.

A construction method of construction equipment using solidified materials for deep mixing, characterized in that the construction equipment using solidified materials for deep mixing according to claim 1 is used for construction according to the following method:

Step 1: Check the safety of the equipment, assemble and test the machine;

Step 2: Reinforce the foundation of the machine body position, keep the mixer shaft vertical, adjust the pile machine leg cylinder so that the drill rod 2 of the drill rig 1 and the horizontal plane form an angle of 90°, and the inclination angle error is not more than 0.5%;

Step 3: Load the resistance-reducing material into the storage box, turn on the motor and use the external stirring drill rod 2 to drive the stirring blade to stir the resistance-reducing material at a speed of 500r/mi, continuous stirring for 5 minutes, and reverse stirring for 5 minutes after an interval of 2 minutes;

Step 4: Pour water into the water tank 7, turn on the booster pump 5, control the concentration of the resistance-reducing material at 2%, and deliver it to the No. 1 channel 12 through the high-pressure hose. The injection pressure range of the resistance-reducing material is 0.2MPa;

Step 5: The material is delivered to the 2nd channel 13 through the high pressure of the air press, and the pressure of the air press is 0.8MPa;

Step 6: Turn on the drilling rig 1, forward rotation, pre-stirring and sinking, the drilling speed is controlled at 0.6m/min, and the drilling speed is controlled at 10r/min. Observe the pressure gauge readings on the booster pump 5 and the air pressure machine, and go down with the drill pipe 2. Drill booster pump 5 gradually increases with a gradient of 0.01MPa, while the air compressor gradually increases with a gradient of 0.01MPa;

Step 7: As the drill rod 2 rotates clockwise, the fixing bolt 16 moves along the chute 15. When it moves to the end of the chute 15, the small nozzle and the No. 1 large nozzle on the converter 14 are connected to the drill rod. 2 is connected, and at the same time, the No. 2 large nozzle is closed;

Step 8: When the drilling is close to the design depth, use low-speed slow-rotation drilling. Drill rig 1 rotates in-situ for 2 minutes. When drilling down to the design depth, rotate counterclockwise and raise the drill bit 3 with a lifting speed of 0.8m /min, the control speed is 10r/min, and the injection pressure is controlled at 0.8MPa. At this time, the fixing bolt 16 moves along the chute 15. When it moves to the end of the chute 15, the No. 2 nozzle on the converter 14 is Drill pipe 2 is connected, and at the same time, the small nozzle and the large nozzle No. 1 are closed;

Step 9: After raising to the design elevation, stir on the spot for 2 minutes; raise the drill bit 3 above the ground, turn off the air compressor 9 and the booster pump 5, and the construction is completed.

Preferably, the material is a powder curing agent such as cement or fly ash, the cement is ordinary Portland cement, the strength grade is 42.5, the cement content range is 25%, and the particle size range is 40 μm.

Example 2:

The construction method described in the present invention is used for construction in the coastal area, and the specific test process is as follows:

As shown in Figure 1-6, a construction equipment that uses solidified materials for deep mixing is characterized in that it includes a drill 1, a drill rod 2, a drill bit 3, a power head 4, a booster pump 5, a resistance reducing material box 6, Water tank 7, material supply warehouse 8, air compressor 9, conveying equipment 10, angle steel 11, channel 1 12, channel 2 13, converter 14, chute 15, fixing bolt 16; the drill rod 2 is a hollow circle Pipe, the drill pipe 2 is provided with No. 1 passage 12 and No. 2 passage 13. When the two pipes are distributed in the drill pipe inside the power head 4, the central axis of the No. 2 passage 13 coincides with the central axis of the drill pipe, 1 Passage 12 is located on the side of Passage 2. When the two pipes enter the drill pipe 2, Passage 2 13 and Passage 1 12 are bent at a certain angle. The center of gravity of the drill pipe 2 coincides with the center axis of the drill pipe 2, so There are two angle steels 11, which are distributed symmetrically along the center of the drill pipe 2. The angle steel 11 is welded on the drill pipe 2, and the length of the angle steel 11 is the same as the drill pipe 2. The resistance reducing material tank 6 and the water tank 7 both pass through the high pressure hose Connected to the booster pump 5, the booster pump 5 is connected to the No. 1 channel 12 through a high-pressure hose, the air compressor 9 is connected to the material supply bin 8 by a high-pressure hose, and the material supply bin 8 is connected to the No. 2 channel 13 through a high-pressure hose The conveying equipment 10 is connected to the material supply warehouse 8 to convey materials; the materials are conveyed to the drill bit 3 through the No. 1 channel 12 and the No. 2 channel 13 for construction work.

Step 1: Check the safety of the equipment, assemble and test the machine;

Step 3: Load the resistance-reducing material into the storage box, turn on the motor and use the external stirring drill rod 2 to drive the external stirring blade to stir the resistance-reducing material at a speed of 500r/mi, continuous stirring for 5 minutes, and reverse stirring for 5 minutes after an interval of 2 minutes;

Step 5: The cured material is delivered to the 2nd channel 13 through the high air pressure of the air press, and the pressure of the air press is 0.8MPa;

Step 8: When the drilling is close to the design depth, use low-speed slow-rotation drilling, and the rig 1 rotates in-situ for 2 minutes. When the drill reaches the design depth, reverse rotation, that is, rotate counterclockwise and raise the drill bit 3 at a lifting speed of 0.8m /min, the control speed is 10r/min, and the injection pressure is controlled at 0.8MPa. At this time, the fixing bolt 16 moves along the chute 15. When it moves to the end of the chute 15, the No. 2 nozzle on the converter 14 is Drill pipe 2 is connected, and at the same time, the small nozzle and the large nozzle No. 1 are closed;

The present invention is a construction equipment and construction method for deep mixing using solidified materials. Through the action of resistance reducing materials, the mixing resistance of deep mixing piles in deeper formations is significantly reduced; by setting nozzles with different apertures, and drilling down Automatic conversion of nozzles during drilling and lifting can solve the difficult problem of changing the type of grout in different construction stages; by setting the angle steel 11, the air pressure caused during the construction process can be effectively reduced, and the disturbance to the surrounding soil can be reduced.

Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention also belong to the present invention. The scope of protection.

Claims

A construction equipment that uses solidified materials for deep mixing, which is characterized in that it includes a drill, a drill rod, a drill bit, a power head, a booster pump, a resistance reducing material tank, a water tank, a solidified material supply warehouse, an air compressor, a transmission equipment, Angle steel, No. 1 passage, No. 2 passage, converter, chute, fixing bolt; The drill pipe is a hollow round pipe, and the inside of the drill pipe is provided with No. 1 and No. 2 passages. When the two pipes are distributed inside the power head When drilling pipe, the central axis of channel 2 coincides with the central axis of the section of drill pipe. Channel 1 is located on the side of channel 2. When two pipes enter the drill pipe, channel 2 and channel 1 have a certain angle. Bending, the center of gravity of the drill pipe coincides with the center axis of the drill pipe; the two angle steels are symmetrically distributed along the center of the drill pipe, and the angle steel is welded on the drill pipe, and the length of the angle steel is the same as the length of the drill pipe; the resistance reducing material Both the tank and the water tank are connected to the booster pump through a high-pressure hose, the booster pump is connected to channel 1 through a high-pressure hose, the air compressor is connected to the material supply bin through a high-pressure hose, and the material supply bin is connected to channel 2 through a high-pressure hose , The conveying equipment is connected with the material supply warehouse to convey materials; the materials are conveyed to the drill bit through the No. 1 channel and the No. 2 channel for construction operations.
The construction equipment for deep mixing using solidified materials according to claim 1, wherein the converter is provided with three spouts and chutes, and a fixing bolt is provided at the drill rod at the position corresponding to the chutes, The converter is fixed by the fixed bolt, and the opening and closing state of the nozzle can be adjusted by the rotation of the drill rod when drilling down and lifting the drill. The three nozzles are divided into small nozzles, No. 1 large nozzles, No. 2 large nozzles, and small nozzles and No. 1 large nozzles. The nozzles are symmetrically distributed with respect to the center of the converter section, and are arranged near the blades of the drill bit, the No. 2 large nozzle and the No. 1 large nozzle are in the same vertical plane, and the No. 2 large nozzle is set at the blade away from the drill bit; the chute There are four chutes symmetrically distributed about the center of the converter. Each chute occupies 1/8 of the circumference of the entire converter. The width of the chute is 0.5-2.0cm and the depth is 2.0-5.0cm. The moving speed range of the chute is 0.01-0.1rad/s.
The construction equipment for deep mixing using solidified materials according to claim 1, wherein the side length of the angle steel is in the range of 80-140mm and the thickness is in the range of 8-14mm; the drill rod is a double pipe, The diameter of the drill rod is 200-300mm, and the wall thickness is 8-12mm.
The construction equipment for deep mixing using solidified materials according to claim 1, wherein the No. 1 channel is parallel to the No. 2 channel, and the distance between the axes of the two is 30mm-300mm. What is conveyed is a fluid plastic liquid, what is conveyed in the 2nd channel is a powdery solid, the 2nd channel is 1.5-2.0 times the diameter of the 1st channel, and the bending angle range of the 2nd channel and the 1st channel is 10°-80°.
The construction equipment for deep mixing using solidified materials according to claim 1, characterized in that the small nozzle is arranged on the front side of the blade, the diameter of the nozzle is in the range of 3-5mm, and the diameter of the No. 1 large nozzle and the No. 2 large nozzle The range is 5-8mm, all distributed on the back side of the blade.
The construction equipment for deep mixing using solidified materials according to claim 1, characterized in that the conveying equipment includes a conveyor belt, a protective cover, one end of the conveyor belt is close to the ground for loading the solidified material, and the other end of the conveyor belt is fixed in the material supply bin At the upper feeding port, a protective cover is provided on the conveyor belt, the cross section of the protective cover is semicircular, and the conveyor belt forms a closed channel together.
A construction method for construction equipment using solidified materials for deep mixing, characterized in that the construction equipment using solidified materials for deep mixing according to claim 1 is used for construction according to the following method:

Step 1: Check the safety of the equipment, assemble and test the machine;

Step 2: Reinforce the foundation for placing the machine body, keep the mixer shaft vertical, adjust the pile machine leg cylinder so that the drill rod of the drill rig is at a 90-degree angle with the horizontal plane, and the inclination angle error is not more than 0.5%;

Step 3: Load the resistance-reducing material into the storage box, turn on the motor and use the external stirring drill rod to drive the external stirring blade to stir the resistance-reducing material at a speed of 100r/min-2000r/min, continuous stirring for 3-10min, after an interval of 1-5min Reverse stirring for 3-10min;

Step 4: Pour water into the water tank, turn on the booster pump, control the concentration of the resistance-reducing material at 0-5%, and deliver it to channel 1 through the high-pressure hose. The injection pressure of the resistance-reducing material is in the range of 0.01-1.0MPa;

Step 5: The solidified material is delivered to the No. 2 channel through the high air pressure of the air press, and the pressure of the air press is 0.1-5.0 MPa;

Step 6: Turn on the drilling rig, rotate forward, pre-stir and sink, control the drilling speed at 0.5m/min~3.0m/min, control the drilling speed at 5r/min~50r/min, observe the pressure gauge on the booster pump and the air pressure machine Readings, as the drill pipe is drilled, the booster pump gradually increases with a gradient of 0.01MPa-0.1MPa, while the air compressor gradually increases with a gradient of 0.01MPa-0.1MPa;

Step 7: As the drill pipe rotates clockwise, the fixing bolt moves along the chute. When it moves to the end of the chute, the small nozzle on the converter and the large nozzle No. 1 are connected to the drill pipe. At the same time, 2 No. large spout is closed;

Step 8: When the drilling is close to the design depth, apply low-speed slow-rotation drilling, and the drill rig rotates in situ for 1-2 minutes. When the drill reaches the design depth, reverse rotation, that is, rotate counterclockwise and raise the drill bit at a speed of 0.2~ 2.0m/min, the control speed is 5r/min~30r/min, and the injection pressure is controlled at 0.2~5MPa. At this time, the fixing bolt moves along the chute. When it moves to the end of the chute, No. 2 on the converter The large nozzle is connected with the drill pipe, and at the same time, the small nozzle and the No. 1 large nozzle are closed;

Step 9: After raising to the design elevation, stir on the spot for 1-5 minutes; raise the drill bit above the ground, turn off the air compressor and booster pump, and the construction is completed.
The construction method of construction equipment using solidified materials for deep mixing according to claim 7, characterized in that the material is a powder solidifying agent such as cement or fly ash, and the cement is ordinary Portland cement with a strength grade It is 42.5, the cement content range is 8-30%, and the particle size range is 1-60μm.