A shallow and deep mixing equipment and rapid reinforcement method for soft soil road sites

Abstract

The present invention is a rapid foundation treatment and reinforcement method for road sites on soft soil layers. The shallow and deep mixing rapid reinforcement equipment and method for road sites on soft soil layers adopt a newly developed multifunctional multi-axis deep and shallow cement mixing pile machine. Cement is mixed into the soft stratum to form a shallow hardened thick cushion layer 1 with a certain strength and a cement mixing soil long pile body 2 with a certain depth, and the road site surface layer 3 constructed later is combined to form a complete and solid road site to meet the site settlement requirements. The foundation treatment and reinforcement method has the significant advantages of reliable construction quality, fast construction speed, and can greatly save the cost of foundation treatment.

Description

Technical Field

[0001] The invention discloses a foundation treatment method suitable for a road site on a soft soil layer - shallow and deep mixing rapid reinforcement equipment and method for a road site on a soft soil layer. Background Art

[0002] In the field of civil engineering construction, we often encounter the construction of soft soil road sites, such as road construction in municipal engineering, square and building floor construction in urban housing construction, container terminal yard in port construction, airport runway construction, foundation treatment and reinforcement of reclamation projects, etc. Such construction projects are inseparable from the reinforcement of soft soil layers, and the construction on various more complex sites is increasing. The current foundation treatment and reinforcement technology has been difficult to solve this problem well. It is of great significance and imperative to develop an efficient, reliable, low-cost and fast foundation reinforcement method. Summary of the invention

[0003] The present invention discloses a rapid foundation treatment and reinforcement method for road site construction on a soft soil layer - shallow and deep mixing rapid reinforcement equipment and method for road sites on a soft soil layer.

[0004] The present invention includes two aspects: one is the development of a foundation reinforcement form for road sites on soft soil layers, which consists of an upper original soil cement mixing thick cushion body and a lower deep and long anti-subsidence cement mixing pile body. This reinforcement form has excellent anti-subsidence mechanical properties under heavy vehicles or other heavy loads, and has a very good comprehensive cost-effectiveness in construction; the second is the invention of a special supporting new equipment that can quickly realize and complete the above-mentioned foundation reinforcement form. This special new equipment is equipped with a special shallow mixing system, which can quickly construct and complete various forms of upper original soil cement mixing thick cushion bodies to meet various special requirements of reinforcement design. This new equipment is also equipped with a special deep mixing system, which can quickly construct and complete various forms of lower deeper cement mixing pile bodies to meet various special requirements of reinforcement design.

[0005] The beneficial effects of the present invention are as follows: the reinforcement body formed by the construction of the new equipment of the invention not only has reliable construction quality and fast construction speed, but also can greatly save the cost of foundation treatment, and has significant advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a cross-sectional view of the reinforcement treatment of shallow and deep cement-soil mixing piles on a soft soil road site;

[0007] Figure 2 This is the elevation drawing of the multifunctional multi-axis deep and shallow cement mixing pile machine;

[0008] Figure 3.1 This is the front elevation of the multi-axis shallow mixing system of the multi-function multi-axis deep and shallow cement mixing pile machine;

[0009] Figure 3.2 It is a side view of the shallow mixing power component of the multifunctional multi-axis deep and shallow cement mixing pile machine;

[0010] Figure 3.3 It is a front view of the shallow mixing power component of the multifunctional multi-axis deep and shallow cement mixing pile machine;

[0011] Figure 3.4 It is a top view of multiple shallow mixing power components of a multifunctional multi-axis deep and shallow cement mixing pile machine;

[0012] Figure 4.1 to Figure 4.4 Plans of short cement-soil mixing piles with different arrangements completed for shallow mixing power system construction;

[0013] Figure 4.5.1 to Figure 4.5.2 Plan view of staggered arrangement of long and short piles completed for shallow mixing power system construction;

[0014] Figure 4.6.1 to Figure 4.6.2 The plan view of the reinforcement body formed by the construction of the unequally spaced combined mixing function of the shallow mixing system;

[0015] Figure 4.7.1 to Figure 4.7.6 The plan view of the reinforcement body formed by the interlocking combined mixing function construction of the shallow mixing system;

[0016] Figure 5.1.1 to Figure 5.1.2 It is the front view and side view of the multi-axis deep mixing system of the multi-function multi-axis deep and shallow cement mixing pile machine;

[0017] Figure 5.2.1 to Figure 5.2.2 It is the side view and front view of a single standardized deep stirring power component of a multi-axis deep stirring system;

[0018] Figure 5.3 This is a detailed view of the top of the deep stirring power component;

[0019] Figure 5.4 (including Figure 5.4.1 to Figure 5.4.3 ) is the elevation and plan view of the deep-mixing retractable drill pipe;

[0020] Figure 5.5 It is a plan view of the deep stirring power components with more than three sections;

[0021] Figure 5.6 This is the outer pipe drawing of the deep mixing system drill pipe;

[0022] Figure 5.7 This is a large-scale drawing of the inner tube with four steel rails welded on the outside;

[0023] Figure 6.1 This is a plan view of the simultaneous construction of multiple cement mixing piles at equal distances in the deep mixing system;

[0024] Figure 6.2.1 to Figure 6.2.3 The plan view of the variable depth long and short cement mixing piles of the deep mixing system for synchronous construction;

[0025] Figure 6.3.1 to Figure 6.3.3 This is the plan view of the simultaneous construction of unequally spaced cement mixing piles in the deep mixing system;

[0026] Figure 6.4.1 to Figure 6.4.4 This is the plan view of the simultaneous construction of unequally spaced interlocking cement mixing piles in the deep mixing system;

[0027] Figure 6.5.1 to Figure 6.5.5 It is the plan view of the simultaneous construction of the unequally spaced cement mixing piles for the side piers of the deep mixing system;

[0028] Figure 6.6.1 to Figure 6.6.4 The plan view of the simultaneous construction of the anti-seepage curtain of unequally spaced cement mixing piles for the deep mixing system;

[0029] In the figure: 1-hardened thick cushion layer, 2-cement mixing long pile body, 3-road field surface layer, 4-multi-axis shallow mixing system, 5-multi-axis deep mixing system, 6-machine base and mobile walking system, 7-hoisting system, 8-hydraulic power system, 9-central control room, 10-shallow mixing system rotating power head, 11-power head fixing part gripper, 12-vertical column, 13-lifting slideway, 14-lifting hydraulic tractor, 15-column fixing part, 16-mixing drill rod, 17-mixing drill blade, 18-grouting pipe, 19-fixed positioning part, 20-fixed part, 21-shallow mixing combined frame, 22-gripper, 23-flat steel frame, 24-slide rail, 25-left and right hydraulic Pressure traction device, 26-pile driver base slide rail, 27-front and rear hydraulic traction device, 28-deep mixing rotating power head, 29-deep mixing power head fixing frame, 30-deep mixing drill rod, 31-deep mixing drill bit, 32-grouting pipe retractor, 33-slurry pipe retractor and drum electric drive, 34-power frame, 35-main frame, 36-motor, 37-pulley block, 38-gripper, 39-vertical slide rail, 40-positioning fixing clamp, 41-steel slide rail, 42-external convex top ring, 43-pin rod, 44-locking and unlocking device, a-shallow reinforcement cement mixing short pile, b-shallow reinforcement cement mixing long pile, c-deep reinforcement cement mixing short pile, d-deep reinforcement cement mixing long pile,. DETAILED DESCRIPTION

[0030] The present invention can be implemented according to the following steps and modes.

[0031] 1. The present invention is a rapid foundation treatment and reinforcement method suitable for the construction of road sites on soft soil layers. This foundation treatment and reinforcement method is composed of mixing cement soil in the original soil to form a shallow hardened thick cushion layer 1 with a certain strength and a cement mixing long pile body 2 with a certain depth, combined with the road site surface layer 3 constructed later to jointly reinforce a complete and solid road site to meet the site settlement requirements ( Figure 1The specific structure and thickness of the hardened thick cushion layer 1 are determined by the design according to the construction function and soil conditions. The general thickness is 1m to 5m, and the depth of the cement mixing long pile body 2 is generally 8m to 25m.

[0032] 2. The present invention has developed a multifunctional multi-axis shallow and deep cement mixing pile driver specifically for the above-mentioned soft road site foundation treatment and reinforcement, which can quickly and efficiently complete the foundation treatment and reinforcement construction. The new pile driver consists of a multi-axis shallow mixing system 4, a multi-axis deep mixing system 5, a machine base and a mobile walking system 6, a lifting system 7, a hydraulic power system 8 and a central control room 9 ( Figure 2 ).

[0033] 3. The new multifunctional multi-axis deep and shallow cement mixing pile machine developed by the present invention is equipped with a specially developed multi-axis shallow mixing system 4 ( Figure 3.1 ), the shallow stirring system consists of the following components:

[0034] (1) Single standardized shallow stirring force component ( Figure 3.1 , Figure 3.2 , Figure 3.3 ) consists of a rotary power head 10, a power head fixing gripper 11, a vertical column 12, a lifting slide 13, a lifting hydraulic tractor 14, a column fixing 15, a mixing drill rod 16, a mixing drill blade 17 and a grouting pipe 18. The rotating speed of the rotary power head 10 is 15 to 80 rpm, the rotating torque is 5 to 20 kN.m, and it is electrically driven by an electric motor combined with a reducer or hydraulically driven by an oil motor. There is a power head lifting slide 13 on the vertical column 12, and the length of the column is determined by the shallow mixing reinforcement depth and the sliding length of the rotary power head. The lifting hydraulic tractor 14 is fixed to the upper part of the vertical column 12 by a fixing 20, and its bottom end is connected to the rotary power head fixing gripper 11, and the lifting and lowering of the power head mixing is completed by hydraulic drive. The telescopic length of the lifting hydraulic tractor 14 is consistent with the up and down sliding length of the rotary power head 10. The total length of the mixing drill rod 16 and the drill bit 17 is determined by the thickness of the shallow soil layer to be mixed, and matches the sliding length of the rotary power head, which is between 2m and 6m. The thickness of the shallow soil layer can be 1m to 5m (if necessary, it can be thicker), meeting the design thickness requirements of the reinforced roads and sites. The outer diameter of the blade of the mixing blade drill bit 17, that is, the diameter of the mixing cement soil, can be 0.4m to 1.2m. The lower part of the mixing drill rod 16 has a fixed positioning member 19.

[0035] (2) Multiple shallow stirring force components ( Figure 3.1 , Figure 3.4) is to connect each standardized shallow stirring power component with the shallow stirring combined frame 21 by bolts through the column fixing frame 15 to form a whole. The number of the installed standardized shallow stirring power components is determined by the width of the pile driver and the outer diameter of the blade of the mixing drill bit, which can be 2 to 6, and can be increased accordingly to improve the construction efficiency; the center distance between the intervals is 0.6m to 1.8m, and can be installed at equal or unequal intervals, and can be flexibly installed according to the design reinforcement requirements through the multiple groups of screw holes pre-drilled on the shallow stirring combined frame 21.

[0036] (3) The horizontal left and right movement of the shallow stirring power assembly is achieved by the shallow stirring combined frame 21 being located on the slide rail 24 of the flat steel frame 23 through the gripper 22, and the left and right hydraulic tractors 25 are extended and retracted. Figure 3.3 , Figure 3.4 ).

[0037] (4) The horizontal forward and backward movement of the shallow stirring power assembly is achieved by the flat steel frame 23 being located on the pile driver base slide rail 26 through the grippers 25 at both ends, and the telescopic movement of the two front and rear hydraulic tractors 27 is used. Figure 3.3 , Figure 3.4 ).

[0038] 4. The new shallow stirring system developed by the present invention has the following special functions:

[0039] (1) The static mixing function of the shallow mixing system. According to the requirements of the foundation treatment design, the static mixing can be positioned to drive a row of shallow reinforcement cement mixing short piles a at a time, and then move forward to drive the second row, and then advance to complete the reinforcement ( Figure 4.1 ).

[0040] (2) The shallow mixing system has the function of moving forward and backward. According to the requirements of the foundation treatment design, the upper and lower shallow mixing systems can be started while the front and rear hydraulic traction can be started to reinforce the shallow layer into a cement mixing longitudinal wall ( Figure 4.2 ).

[0041] (3) The left and right moving mixing function of the shallow mixing system. According to the requirements of the foundation treatment design, the upper and lower shallow mixing systems can be started while the left and right hydraulic traction can be started to reinforce the shallow layer into a cement mixing horizontal wall. Then, the shallow mixing system can be lifted and moved forward to position before the second horizontal wall is built. In this way, the reinforcement is completed. Figure 4.3 ).

[0042] (4) The shallow mixing system has a synchronous front, rear, left, and right moving mixing function. If the foundation treatment design requires shallow overall reinforcement, such as important roads, airport runways and other projects, while starting the upper and lower shallow mixing systems and starting the left and right and front and back hydraulic traction, the shallow cement mixing soil overall reinforcement can be completed quickly and easily ( Figure 4.4 ).

[0043] (5) Shallow mixing system with alternating deep and shallow mixing functions. Since the start-up and up-and-down stirring of each individual mixing component in the shallow mixing system of the present invention are independent, each individual mixing component can be conveniently set and controlled so that the reinforcement depth of each mixing pile is different, meeting various distribution requirements of the reinforcement design ( Figure 4.5.1 and Figure 4.5.2 ).

[0044] (6) The unequal distance combined mixing function of the shallow mixing system. During the construction process, the individual mixing components in the shallow mixing system can be easily loosened and moved with the help of the lifting system configured by the pile driver of the present invention, so that the center distance between the individual mixing components can be adjusted as needed, forming respective unequal distance reinforcement bodies ( Figure 4.6.1 and 4.6.2 ).

[0045] (7) The interlocking combination mixing function of the shallow mixing system. During the construction process, the hoisting system configured by the pile driver of the present invention can be used to conveniently loosen the installation bolts and shift the center distance between two or more single mixing components to the minimum so that the mixing blades are staggered. In this way, the mixing soil is interlocked to meet the special foundation reinforcement requirements ( Figure 4.7.1 to Figure 4.7.6 ).

[0046] (8) The interval reverse stirring function of the shallow stirring system. Since the rotation direction of each monomer stirring component in the shallow stirring system of the present invention is independent, the forward and reverse rotation stirring of each shallow stirring power component can be freely set according to the stirring effect, especially setting the forward and reverse rotation of two shallow stirring power components adjacent to each other to enhance the stirring effect.

[0047] 5. The new multifunctional multi-axis deep and shallow cement mixing pile machine developed by the present invention is equipped with a specially developed multi-axis deep mixing system 5 ( Figure 5.1.1 and Figure 5.1.2 ), this deep stirring system consists of the following components:

[0048] (1) Single standardized deep stirring power component ( Figure 5.2.1 and Figure 5.2.2 ), a single standardized deep stirring power component is composed of a deep stirring rotating power head 28, a deep stirring power head fixing frame 29, a deep stirring drill rod 30, a deep stirring drill bit 31, a grouting pipe retractor 32, and a grouting pipe retractor drum electric drive 33. The power head has a rotation speed of 15 to 50 rpm and a rotation torque of 10 to 50 kN.m, and is electrically driven by an electric motor combined with a reducer or hydraulically driven by an oil motor.

[0049] (2) Composition of multiple deep stirring power components ( Figure 5.1.1 to Figure 5.3 ), is composed of a plurality of deep stirring power components being fixed together on the same power frame 34 by bolts through their power head fixing frame 29.

[0050] (3) Deep mixing reinforcement of roadbed sites on soft soil layers is to drive long cement mixing piles to control ground settlement. The driving depth is determined by the thickness of the soft soil layer on site, the soil properties and the upper load (vehicle load or pile load, etc.). The reinforcement depth is determined by the total length of the drill rod 30 and the drill bit 31 and the height of the corresponding main frame 35. The total length of the drill rod 30 and the drill bit 31 plus the deep mixing power head 28 and the grouting pipe retractor 32, plus some space reserved, determines the height of the main frame 35, which is also the total height of the entire newly invented pile driver. The height of the pile driver is limited due to safety and stability, resulting in a limited mixing reinforcement depth. The solution is usually to connect the drill rod including the connection of the grouting pipe inside the drill rod, which will greatly increase the difficulty of construction and reduce work efficiency. The present invention has developed a simple multi-section automatic telescopic drill rod 30 and a grouting pipe retractor 32, so that the height of the pile driver deep mixing main frame 35 only needs to be determined according to the length of one section of the drill rod (generally 10m to 15m), but the mixing reinforcement depth is not limited, and the reinforcement depth requirement can be met by installing more sections of telescopic drill rods ( Figure 5.1.1 and Figure 5.1.2 ).

[0051] (4) The up and down movement of the deep stirring power assembly in the main frame 35 is driven by the synchronous motors 36 on both sides of the main frame to drive the bevel gears and drive the multiple strands of steel wire on the pulley block 37, so that the power head frame 34 can be lifted up and down. The power and speed of the synchronous motor 36 and the number of upper and lower pulley blocks 37 are determined according to the force required for lifting the deep stirring power component and the lifting speed. The deep stirring power frame 34 slides up and down stably along the four vertical slide rails 39 installed on the main frame 35 through the grippers 38 at the four corners ( Figure 5.1.1 to Figure 5.3 ).

[0052] (5) The deep mixing retractable drill pipe 30 is usually composed of a first section outer pipe and a second section inner pipe. The length of a single section is generally 10m to 15m. After the second section is extended, the total length is about 20m to 30m, which can meet the design requirements of conventional deep mixing reinforcement (Figure 5.4). If deeper reinforcement is required, a third section inner pipe can be inserted into the second section inner pipe to make the mixing reinforcement depth reach 30m to 45m ( Figure 5.5 ).

[0053] (6) A special positioning and fixing chuck 40 (Fig. 5.4) is provided at the bottom end of the first section outer tube of the deep stirring telescopic drill pipe 30. Four steel slide rods 41 can be welded on the outside of the second section inner tube, and their outer diameter can be precisely slid and retracted on the positioning and fixing chuck 40; an outer convex top ring 42 is provided on the top of the second section inner tube, and its outer diameter just matches the inner diameter of the first section outer tube, and can slide precisely and freely; the locking and unlocking of the up and down telescopic movement of the second section inner tube is completed by punching holes in the inner and outer tube walls and passing through a pin 43; if deeper reinforcement is required, the third section inner tube needs to be placed inside the second section inner tube, and the bottom end of the second section inner tube should still be provided with a special positioning and fixing chuck 40, and four steel slide rails 41 are also welded on the outside of the third section inner tube to enable it to slide and retract precisely.

[0054] (7) The locking and unlocking of the extension, elongation and retraction of the deep-mixing telescopic drill rod 30 is accomplished by drilling holes in the inner and outer pipe walls through a pin rod 43. The locking and unlocking can be implemented manually or by an automatic hydraulic locking and unlocking device 44 controlled by a central control room. The locking and unlocking device 44 is installed on the base of the pile driver of the present invention and also serves as the lower positioning device of the rotating drill rod 30 ( Figure 5.1.1 ).

[0055] (8) The deep mixing grouting system of the present invention is to place a rotating drum 32, which is an automatic retractor of the soft grouting pipe, on each standardized deep mixing power component. The rotating drum 32 around the soft grouting pipe is automatically driven by a motor 33. When the internal drill rod is extended, the soft grouting pipe can be automatically pulled out. When the internal drill rod is retracted, the motor 33 automatically drives the rotating drum to synchronously retract the soft grouting pipe at a constant speed. Figure 5.2.2 ).

[0056] 6. The new deep stirring system developed by the present invention has the following special functions:

[0057] (1) Multiple cement mixing piles of the deep mixing system are synchronously constructed with equal distances. The center distances of each standardized deep mixing power component 28 can be conveniently adjusted and installed through multiple groups of reserved bolt holes set on the power head fixing frame 34 to meet the reinforcement design requirements. Multiple cement mixing piles are synchronously driven ( Figure 6.1 )

[0058] (2) The variable depth long and short cement mixing piles of the deep mixing system are constructed synchronously. Each standardized deep mixing power component is independently controlled and driven. According to the reinforcement design requirements, multiple long and short cement mixing piles can be constructed synchronously. Figure 6.2.1 to Figure 6.2.3 ).

[0059] (3) The unequally spaced cement mixing piles of the deep mixing system are constructed synchronously. The center distance of each standardized deep mixing power component can be installed in various combinations according to the reinforcement design requirements so that various combinations of horizontally unequally spaced cement mixing piles can be synchronously driven to achieve the purpose of uneven reinforcement ( Figure 6.3.1 to Figure 6.3.3 ).

[0060] (4) The deep mixing system uses unequally spaced interlocking cement mixing piles to be constructed synchronously. The various standardized deep mixing power components can be installed in combination with reduced center distances according to the reinforcement design requirements so that they can be synchronously driven into various combinations of interlocking cement mixing piles to meet special needs. For example, based on the soft soil layer roadbed, the roadbed will slide outward as a whole and become unstable due to heavy vehicle rolling. The design requires the reinforcement of anti-side cement mixing piles along the roadbed side ( Figure 6.4.1 to Figure 6.4.4 ).

[0061] (5) Synchronous construction of unequally spaced cement mixing piles and lateral piers of the deep mixing system. Each standardized deep mixing power component can be installed according to the above (4) based on the reinforcement design requirements. After the first row of cement mixing piles is installed, the forward walking distance is controlled to form a pier body, so that the soft soil layer roadbed will slide outward as a whole under the rolling of heavy vehicles and become unstable. Special strengthening of lateral pier requirements is required ( Figure 6.5.1 to Figure 6.5.5 ).

[0062] (6) Synchronous construction of the anti-seepage curtain of unequally spaced cement mixing piles in the deep mixing system. Each standardized deep mixing power component can be installed according to the above (4) based on the reinforcement design requirements. After the first row of cement mixing piles are driven, the forward movement is controlled to advance in a fully interlocking manner to achieve the anti-seepage and reinforcement requirements of the treated foundation soil ( Figure 6.6.1 to Figure 6.6.4 ), such as the need for deep-layer isolation to prevent seawater erosion on the seaward side of reclamation projects.

[0063] The above-mentioned standardized deep mixing power components can be quickly disassembled and installed as needed during the construction process through the crane provided by the pile foundation.

[0064] 7. The present invention uses the deep mixing and piling system of the recently developed multifunctional multi-axis deep and shallow cement mixing pile machine to quickly and synchronously construct various deep controlled sinking cement mixing soil piles according to design requirements and implant rigid reinforcements in the piles to form composite controlled sinking piles with cement mixing soil. These rigid reinforcements can be whole bamboos, pine piles, steel pipes, prefabricated reinforced concrete components, etc.

[0065] 8. The present invention uses a recently developed multifunctional multi-axis deep and shallow cement mixing pile machine to achieve cement soil mixing by wet spraying of cement slurry, or by dry spraying of dry cement powder, or synchronous and intermittent wet and dry spraying (because the mixing and supply of cement for each deep mixing power component can be independent). The specific spraying mixing method is determined by the design according to the characteristics of the soil to be reinforced.

Claims

1. A shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized by: A newly developed multifunctional multi-axis deep and shallow cement mixing pile machine is used in the original soil of the construction site. Cement is mixed and stirred to form a shallow hardened thick cushion layer 1 with a certain strength and a long cement mixing soil pile body 2 with a certain depth. Combined with the road site surface layer 3 of the later construction, they are reinforced together to form a complete and solid road site to meet the site settlement requirements.

2. According to claim 1, a shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized in that: The multifunctional multi-axis deep and shallow cement mixing pile machine is equipped with a multi-axis shallow mixing system 4, which can form a shallow reinforced hardened thick cushion layer 1 with different pile position plane arrangements according to different needs.

3. According to claim 1, a shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized in that: The multifunctional multi-axis deep and shallow cement mixing pile machine is equipped with a multi-axis deep mixing system 5, which can construct cement mixing soil long pile bodies 2 with different pile position plane arrangements according to different needs.

4. According to claim 1, a shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized in that: The multifunctional multi-axis deep and shallow cement mixing pile machine is equipped with a multi-axis shallow mixing system 4, a multi-axis deep mixing system 5, a machine base and a mobile walking system 6, a lifting system 7, a hydraulic power system 8 and a central control room 9.

5. According to claim 4, a shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized in that: The multi-axis shallow stirring system 4 is composed of a plurality of standardized independent shallow stirring power components connected to a shallow stirring combination frame 21 by bolts through a column fixing frame 15; the number of standardized independent shallow stirring power components can be 2 to 6 depending on the needs of the project, and the center distances between them can be combined as needed, so that it can complete the rapid construction of various special hardened thick cushion layers 1.

6. According to claim 4, a shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized in that: The multi-axis shallow stirring system 4 is composed of independent shallow stirring power components that perform upward and downward rotating stirring operations, all of which are independently controlled and can be combined to implement the construction of various required hardened thick cushion layers 1.

7. According to claim 4, a shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized in that: The shallow mixing assembly of the multi-axis shallow mixing system 4 is equipped with the left and right and front and back movement functions that can be controlled on demand during the up and down rotating mixing operation, which can realize the up and down, left and right and front and back three-dimensional synchronous mixing operations. Combined with the front and back, left and right walking functions of the pile driver's steps, it can further expand the mixing and reinforcement of the thick cushion layer area and improve construction efficiency.

8. According to claim 4, a shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized in that: The shallow stirring assembly of the multi-axis shallow stirring system 4 can be synchronously controlled to move left and right and forward and backward as needed during the up and down rotating stirring operation, realizing synchronous three-dimensional stirring operations up and down, left and right, and forward and backward, and quickly completing shallow reinforcement and hardening of thick cushion layers 1 distributed in various planes.

9. According to claim 4, a shallow and deep mixing equipment and a rapid reinforcement method for a soft soil road site, characterized in that: The up and down rotating mixing operations of each independent deep mixing power component of the multi-axis deep mixing system 5 are independently controlled, and can be synchronously combined to implement the construction of cement mixing piles of various lengths.

10. According to claim 4, a shallow and deep mixing device and a rapid reinforcement method for a soft soil road site, characterized in that: The multi-axis deep mixing system 5 combines the forward, backward, left and right walking functions of the pile driver, especially the forward and backward walking functions, to implement various plane-distributed deep cement mixing discrete group piles, interlocking piles and continuous underground cement soil walls.

11. According to claim 4, a shallow and deep mixing device and a rapid reinforcement method for a soft soil road site, characterized in that: The drill pipe of the multi-axis deep mixing system 5 is composed of a first section outer tube and a second section inner tube; the sleeve manufacturing method is that a special positioning and fixing clamp 40 is provided inside the bottom end of the first section outer tube; four steel slide rails 41 are welded on the outside of the second section inner tube, and the outer diameter thereof is just enough to slide and retract precisely on the positioning and fixing clamp 40; an outer convex top ring 42 is provided on the top of the second section inner tube, and the outer diameter thereof is just enough to match the inner diameter of the first section outer tube, so that it can slide and retract precisely and freely.

12. According to claim 4, a shallow and deep mixing device and a rapid reinforcement method for a soft soil road site, characterized in that: The locking and unlocking of the telescopic drill rod of the multi-axis deep stirring system 5 is completed by the central control room and manual control through the inner and outer pipe wall punching pin rod 43 using the automatic hydraulic unlocker 44.

13. According to claim 4, a shallow and deep mixing device and a rapid reinforcement method for a soft soil road site, characterized in that: The grouting inside the drill rod of the multi-axis deep stirring system 5 is that an automatic retractor 32 for soft grouting pipes driven automatically by a motor 33 is arranged on each standardized deep stirring power component; when the internal drill rod is extended, the soft grouting pipe can be automatically pulled out, and when the internal drill rod is retracted, the motor 33 automatically drives the rotating drum to retract the soft grouting pipe synchronously and at a constant speed.

14. According to claim 4, a shallow and deep mixing device and a rapid reinforcement method for a soft soil road site, characterized in that: The standardized independent mixing components of the multi-axis deep mixing system 5 can be quickly disassembled and installed as needed during the construction process by the crane provided by the pile foundation, without the need to use an additional crane.

15. According to claim 1, a shallow and deep mixing device and a rapid reinforcement method for a soft soil road site, characterized in that: The multifunctional multi-axis deep and shallow cement mixing pile machine has a built-in crane which can implant a rigid reinforcement body into the deep controlled sinking cement mixing soil pile body according to the design, so as to form a composite controlled sinking pile with the cement mixing soil.

16. According to claim 1, a shallow and deep mixing device and a rapid reinforcement method for a soft soil road site, characterized in that: The multifunctional multi-axis deep and shallow cement mixing pile machine can complete cement soil mixing by combining wet spraying of cement slurry and dry spraying of dry cement powder.

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