Guniting device for cement-soil mixing pile

Abstract

The utility model belongs to the technical field of building construction, and discloses a guniting device for a cement-soil mixing pile, which comprises a drilling unit, a rotary driving unit, an injection unit and a guniting unit. And the rotary driving unit is in transmission connection with the drilling unit. The injection unit comprises an injection pipe, an injection mechanism and a first connecting sleeve, the first connecting sleeve is arranged on the drilling unit in a sleeving mode, and a first cavity is defined by the first connecting sleeve and the drilling unit. The injection pipe communicates with the first cavity through the injection mechanism, and the rotary driving unit is in transmission connection with the first connecting sleeve. And at least one guniting unit is arranged and comprises a second connecting sleeve and a plurality of guniting assemblies. The first connecting sleeve is sleeved with the second connecting sleeve, and the second connecting sleeve is detachably connected with the first connecting sleeve. The multiple guniting assemblies are arranged at intervals in the circumferential direction of the second connecting sleeve and communicate with the first cavity. Each guniting assembly is provided with at least one stirring piece. According to the guniting device for the cement mixing pile, mortar can be uniformly dispersed, and construction safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a mortar spraying device for a cement-soil mixing pile. Background Art

[0002] In building construction, cement-soil mixing piles are often used to treat saturated soft clay foundations, that is, a mortar spraying device is used to spray cement into the soil and stir it, so that the soft soil hardens into a high-quality foundation with integrity, water stability and certain strength, realizing foundation reinforcement.

[0003] In the prior art, most mortar spraying devices only set a mortar outlet pipe for spraying mortar on one side of the rotating rod, and stirring rods are arranged on both sides of the outlet pipe. When the drill bit drills downwards, the outlet pipe sprays mortar into the drill hole, and the rotating rod drives the stirring rods to stir the mortar and the soil, so that the two are mixed and hardened. However, when using this method to treat the foundation, since the outlet pipe is only arranged on one side of the rotating rod, it is easy to cause the sprayed mortar to accumulate and cannot be evenly dispersed into the drill hole, resulting in uneven injection of the mortar, thus affecting the pile body strength of the cement-soil mixing pile, reducing the durability of the pile body, and seriously affecting the construction safety in severe cases. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a mortar spraying device for a cement-soil mixing pile, which can evenly disperse the mortar in the drill hole, thereby ensuring that the pile body has high strength and durability and ensuring construction safety.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Provide a mortar spraying device for a cement-soil mixing pile, including:

[0007] A drilling unit;

[0008] A rotary drive unit, which is in transmission connection with the drilling unit, and the rotary drive unit is used to drive the drilling unit to rotate around the vertical direction so that the drilling unit drills holes on the ground;

[0009] An injection unit, including an injection pipe, an injection mechanism and a first connection sleeve. The injection pipe is configured to communicate with a container for storing mortar. The first connection sleeve is sleeved on the drilling unit to form a first chamber with the drilling unit. The injection pipe is communicated with the first chamber through an injection chamber of the injection mechanism. The rotary drive unit is in transmission connection with the first connection sleeve;

[0010] The shotcreting unit is provided with at least one. The shotcreting unit includes a second connecting sleeve and a plurality of shotcreting components. The second connecting sleeve is sleeved outside the first connecting sleeve and is detachably connected to the first connecting sleeve. The plurality of shotcreting components are circumferentially spaced along the second connecting sleeve. The shotcreting components communicate with the first chamber and are used for spraying mortar into the drilling hole. Each shotcreting component is provided with at least one stirring member, and the stirring member can stir the mortar to make the mortar in the drilling hole evenly distributed.

[0011] Optionally, the shotcreting component includes a grouting channel and a spraying member that communicate with each other. One end of the grouting channel away from the spraying member is arranged on the second connecting sleeve, and the grouting channel communicates with the first chamber. The stirring member is arranged on the grouting channel.

[0012] Optionally, the drilling unit includes a connecting rod, a mounting table and a first drill bit that are connected in sequence. One end of the connecting rod away from the mounting table is in transmission connection with the rotary driving unit. The first connecting sleeve is sleeved outside the connecting rod and abuts against the mounting table. The cross-sectional area of the mounting table is greater than or equal to the cross-sectional area of the first connecting sleeve.

[0013] Optionally, the first drill bit includes a conical drill bit.

[0014] Optionally, the drilling unit further includes a plurality of second drill bits, and the plurality of second drill bits are circumferentially spaced along the mounting table.

[0015] Optionally, one end of the connecting rod close to the rotary driving unit is provided with a second chamber and an injection hole. The second chamber communicates with the injection chamber of the injection mechanism, and the first chamber communicates with the second chamber through the injection hole.

[0016] Optionally, the shotcreting device for a soil-cement mixing pile further includes a fastener. The second connecting sleeve is circumferentially provided with a plurality of jacks at intervals, and the first connecting sleeve is circumferentially provided with a plurality of threaded holes at intervals. The jacks and the threaded holes correspond one by one, and the fastener can pass through the jacks and be in threaded cooperation with the threaded holes.

[0017] Optionally, the rotary driving unit includes a mounting frame, a rotary motor and a transmission component. The transmission component is arranged in the mounting frame. The housing of the rotary motor is arranged on the mounting frame. The output end of the rotary motor is in transmission connection with the transmission component. The drilling unit and the first connecting sleeve are both arranged on the transmission component.

[0018] Optionally, the transmission assembly includes a driving wheel, a first driven wheel and a second driven wheel, the output end of the rotating motor is connected to the driving wheel, the first driven wheel and the second driven wheel are arranged at vertical intervals and are engaged with the driving wheel, the drilling unit is arranged on the first driven wheel and vertically penetrates the second driven wheel and the mounting frame, and the first connecting sleeve is arranged on the second driven wheel and is located on the side of the mounting frame away from the second driven wheel.

[0019] Optionally, the grouting device for the cement-soil mixing pile includes a plurality of the grouting units, and the plurality of the grouting units are arranged at intervals along the axial direction of the first connecting sleeve.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a grouting device for cement-soil mixing piles, comprising a drilling unit, a rotary drive unit, an injection unit and a grouting unit. When performing foundation reinforcement, the rotary drive unit is started to drive the drilling unit and the first connecting sleeve to rotate vertically, so that the drilling unit performs a drilling operation, and at the same time, the injection mechanism is started to transport mortar from the injection pipe to the injection chamber of the injection mechanism, and then the mortar is transported to multiple grouting components via the first chamber, and finally sprayed into the borehole. The vertical rotation of the first connecting sleeve drives the grouting components and the stirring member to rotate. Therefore, the grouting component can not only spray the mortar evenly along the circumference of the borehole, but the stirring member can also stir the sprayed mortar, so that the sprayed mortar is more evenly dispersed, thereby avoiding mortar accumulation, ensuring that the pile body of the cement-soil mixing pile has high strength and durability, and ensuring construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a first view of a shotcreting device for cement-soil mixing piles provided by an embodiment of the present utility model;

[0023] Figure 2 This is a second view of the shotcreting device for cement-soil mixing piles provided by an embodiment of the utility model;

[0024] Figure 3 This is a third view of the shotcreting device for cement-soil mixing piles provided by an embodiment of the present utility model;

[0025] Figure 4 It is a structural schematic diagram of a spraying unit provided by an embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the drilling unit provided in an embodiment of the utility model.

[0027] In the figure:

[0028] 1. Drilling unit; 11. Connecting rod; 111. Second chamber; 112. Injection hole; 12. Mounting table; 13. First drill bit; 14. Second drill bit;

[0029] 2. Rotating drive unit; 21. Mounting frame; 22. Rotating motor; 23. Transmission assembly; 231. Driving wheel; 232. First driven wheel; 233. Second driven wheel;

[0030] 3. Injection unit; 31. Injection pipe; 32. Injection mechanism; 33. First connecting sleeve; 331. Threaded hole; 34. First chamber;

[0031] 4. Shotcreting unit; 41. Second connecting sleeve; 411. Jack; 42. Shotcreting assembly; 421. Grouting channel; 422. Spraying member; 43. Stirring member;

[0032] 5. Fastener. Detailed implementation mode

[0033] The present utility model will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for differentiation in description and have no special meaning.

[0037] This embodiment provides a mortar spraying device for a cement-soil mixing pile. As Figures 1 to 5 shown, it can evenly disperse the mortar in the drill hole, thereby ensuring that the pile body has high strength and durability and ensuring construction safety.

[0038] As Figures 1 to 3 shown, the mortar spraying device for the cement-soil mixing pile includes a drilling unit 1, a rotary driving unit 2, an injection unit 3, and a mortar spraying unit 4. Among them, the rotary driving unit 2 is in transmission connection with the drilling unit 1. The rotary driving unit 2 can drive the drilling unit 1 to rotate around the vertical direction so that the drilling unit 1 drills a hole. The injection unit 3 includes an injection pipe 31, an injection mechanism 32, and a first connecting sleeve 33. The injection pipe 31 is configured to communicate with a container storing mortar. The first connecting sleeve 33 is sleeved on the drilling unit 1 to form a first chamber 34 together with the drilling unit 1. The injection pipe 31 communicates with the first chamber 34 through the injection chamber of the injection mechanism 32. The rotary driving unit 2 is in transmission connection with the first connecting sleeve 33. When the injection mechanism 32 is started, the injection mechanism 32 will extract mortar, and the mortar will be extracted to the injection chamber of the injection mechanism 32 via the injection pipe 31 and then enter the first chamber 34. At least one mortar spraying unit 4 is provided. The mortar spraying unit 4 includes a second connecting sleeve 41 and a plurality of mortar spraying components 42. The second connecting sleeve 41 is sleeved outside the first connecting sleeve 33 and is detachably connected to the first connecting sleeve 33. The plurality of mortar spraying components 42 are arranged at intervals along the circumferential direction of the second connecting sleeve 41. The mortar spraying components 42 communicate with the first chamber 34 and are used for spraying mortar into the drill hole. Each mortar spraying component 42 is provided with at least one stirring member 43, and the stirring member 43 can stir the mortar to make the mortar in the drill hole evenly distributed.

[0039] When performing foundation reinforcement, the rotary drive unit 2 is started to drive the drilling unit 1 and the first connecting sleeve to rotate vertically, so that the drilling unit 1 performs drilling operations. At the same time, the injection mechanism 32 is started to convey the mortar from the injection pipe 31 to the injection chamber of the injection mechanism 32. Then, the mortar is conveyed to a plurality of grout spraying components 42 through the first chamber 34 and finally sprayed into the drill hole. The rotation of the first connecting sleeve 33 around the vertical direction will drive the grout spraying components 42 and the stirring members 43 to rotate. Therefore, the grout spraying components 42 can not only spray the mortar evenly along the circumferential direction of the drill hole, but also the stirring members 43 can stir the sprayed mortar, making the sprayed mortar more evenly dispersed, thus avoiding mortar accumulation, ensuring that the pile body of the soil-cement mixing pile has high strength and durability, and ensuring construction safety. In addition, the first connecting sleeve 33 and the second connecting sleeve 41 are detachably connected, and the structural form is simple, which is convenient for the staff to disassemble and repair each part of the parts.

[0040] In this embodiment, each grout spraying component 42 is correspondingly provided with 3 stirring members 43. In other embodiments, 1, 2 or more than 3 stirring members 43 can also be provided according to actual needs, which is not limited here.

[0041] Exemplarily, the injection mechanism 32 includes a suction pump.

[0042] Optionally, as Figures 1 to 3 shown, the grout spraying device for soil-cement mixing piles includes a plurality of grout spraying units 4. The plurality of grout spraying units 4 are arranged at intervals along the axial direction of the first connecting sleeve 33, that is, the plurality of grout spraying units 4 are arranged at intervals vertically, and the mortar can be sprayed into the drill hole at the same time. By providing a plurality of grout spraying units 4, the working efficiency of spraying the mortar can be improved.

[0043] In the embodiment, 2 grout spraying units 4 are provided. In other embodiments, 1 or more than 2 grout spraying units 4 can also be provided according to actual needs, which is not limited here.

[0044] Optionally, as Figure 1 、 Figure 3 and Figure 4As shown, the grouting assembly 42 includes a grouting channel 421 and a spraying member 422 that are interconnected. The end of the grouting channel 421 away from the spraying member 422 is arranged on the second connecting sleeve 41, and the grouting channel 421 is connected to the first chamber 34. The stirring member 43 is arranged on the grouting channel 421. After the injection mechanism 32 extracts the mortar into the first chamber 34, the mortar will be transported to the spraying member 422 through the grouting channel 421, and then the spraying member 422 will spray the mortar into the borehole, and driven by the rotary drive unit 2, the spraying member 422 will rotate and spray along the circumference of the borehole, and at the same time, the stirring member 43 will stir the sprayed mortar so that the mortar can be evenly dispersed in the borehole, so that the cement soil mixing pile can be evenly formed, ensuring the pile body quality and strength of the cement soil mixing pile.

[0045] In this embodiment, the grouting channel 421 includes a first channel and a second channel that are interconnected, and the first channel and the second channel are connected in a T-shaped manner. The end of the first channel, away from the second channel, is disposed on the second connecting sleeve 41 and is in communication with the first chamber 34. A spraying member 422 is disposed at each upper and lower end of the second channel, and a stirring member 43 is disposed on the second channel. When spraying mortar, two spraying members 422 can be installed simultaneously to spray, thereby improving spraying efficiency and further ensuring uniform distribution of the sprayed mortar.

[0046] Illustratively, the spraying member 422 includes a spray head.

[0047] Alternatively, as Figure 1 、 Figure 3 and Figure 5 As shown, the drilling unit includes a connecting rod 11, a mounting platform 12, and a first drill bit 13, which are connected in sequence. The end of the connecting rod 11, away from the mounting platform 12, is drivingly connected to the rotary drive unit 2. A first connecting sleeve 33 is sleeved over the connecting rod 11 and abuts the mounting platform 12. The first connecting sleeve 33, the mounting platform 12, and the connecting rod 11 enclose a first chamber 34. The cross-sectional area of the mounting platform 12 is greater than or equal to that of the first connecting sleeve 33. This ensures that the lower end of the first chamber 34 is sealed, preventing mortar from directly entering the drill hole through the first chamber 34 and preventing uneven distribution caused by mortar accumulation.

[0048] Optionally, the first drill bit 13 comprises a conical drill bit, i.e., the cross-sectional area of the first drill bit 13 gradually decreases. By setting the first drill bit 13 as a conical drill bit, the cutting area can be increased, and the conical drill bit can increase the cutting force of the first drill bit 13, reduce the resistance during the cutting process, make the cutting smoother, and improve the drilling efficiency.

[0049] In other embodiments, the first drill bit 13 may be configured to be in a truncated cone shape or other shapes according to actual needs, which is not limited here.

[0050] Optionally, as Figures 1 to 3 shown, the drilling unit 1 further includes a plurality of second drill bits 14. The plurality of second drill bits 14 are circumferentially spaced along the mounting table 12. When drilling operations are performed, driven by the rotary drive unit 2, the first drill bit 13 and the second drill bits 14 rotate simultaneously around the vertical direction, and drilling is performed simultaneously by the first drill bit 13 and the second drill bits 14. By providing the second drill bits 14, the first drill bit 13 can be assisted in drilling operations, improving the working efficiency of drilling.

[0051] In this embodiment, 4 second drill bits 14 are provided, and the maximum cutting area of the second drill bits 14 is larger than the maximum cutting area of the first drill bit 13, which can expand the cross-sectional area of the drilled hole. In other embodiments, 1 to 3, or more than 4 second drill bits 14 can also be provided according to actual needs, which is not limited herein.

[0052] Optionally, as Figure 1 and Figure 2 shown, one end of the connecting rod 11 close to the rotary drive unit 2 is provided with a second chamber 111 and an injection hole 112. The second chamber 111 communicates with the injection chamber of the injection mechanism 32, and the first chamber 34 communicates with the second chamber 111 through the injection hole 112. When the injection mechanism 32 extracts mortar, the mortar enters the injection chamber of the injection mechanism 32 via the injection pipe 31, then enters the second chamber 111 and then enters the first chamber 34 through the injection hole 112, and finally the mortar is sprayed into the drilled hole by the spraying component 42.

[0053] Optionally, as Figure 3 and Figure 4 shown, the mortar spraying device for the soil-cement mixing pile further includes a fastener 5. The second connecting sleeve 41 is circumferentially provided with a plurality of jacks 411 at intervals, and the first connecting sleeve 33 is circumferentially provided with a plurality of threaded holes 331 at intervals, and the jacks 411 correspond to the threaded holes 331 one by one. When connecting the first connecting sleeve 33 and the spraying unit 4, the second connecting sleeve 41 of the spraying unit 4 is sleeved outside the first connecting sleeve 33, and the plurality of jacks 411 and the plurality of threaded holes 331 are made to coincide with each other one by one, and then the fastener 5 is passed through the jacks 411 and threadedly engaged with the threaded holes 331, thereby realizing the connection between the first connecting sleeve 33 and the spraying unit 4. The structural form is simple, the operation is convenient, and it is easy to disassemble. In addition, the jacks 411 and the threaded holes 331 are both circumferentially provided at intervals, and the first connecting sleeve 33 and the second connecting sleeve 41 can be connected and fixed in multiple directions, ensuring the stability of the connection of the spraying unit 4.

[0054] In this embodiment, each second connecting sleeve 41 has four insertion holes 411, and correspondingly, each second connecting sleeve 41 connected requires four threaded holes 331 on the first connecting sleeve 33. In other embodiments, each second connecting sleeve 41 may have two, three, or more insertion holes 411, and correspondingly, each second connecting sleeve 41 connected requires two, three, or more threaded holes 331 on the first connecting sleeve 33, depending on actual needs. This is not limited here.

[0055] It should be noted that the number of the fasteners 5 is the same as the number of the sockets 411 .

[0056] Exemplarily, the fastener 5 includes a bolt.

[0057] Alternatively, as Figure 1 and Figure 2 As shown, the rotary drive unit 2 includes a mounting frame 21, a rotary motor 22, and a transmission assembly 23. The transmission assembly 23 is disposed within the mounting frame 21, the housing of the rotary motor 22 is disposed on the mounting frame 21, and the output end of the rotary motor 22 is in transmission connection with the transmission assembly 23. The drilling unit 1 and the first connecting sleeve 33 are both disposed on the transmission assembly 23. When foundation reinforcement is performed, the rotary motor 22 is started, which drives the transmission assembly 23 to rotate, thereby driving the drilling unit 1 and the first connecting sleeve 33 to rotate vertically, causing the drilling unit 1 to perform a drilling operation. The rotation of the first connecting sleeve 33 drives the spraying assembly 42 and the stirring member 43 to rotate, thereby spraying the mortar circumferentially along the borehole. At the same time, the stirring member 43 stirs the mortar to ensure uniform distribution of the mortar, thereby ensuring the quality of the cement-soil mixing pile. In addition, the transmission assembly 23 is disposed within the mounting frame 21, so that the mounting frame 21 protects the transmission assembly 23.

[0058] Alternatively, as Figures 1 to 3 As shown, the transmission assembly 23 includes a driving wheel 231, a first driven wheel 232 and a second driven wheel 233. The output end of the rotary motor 22 is connected to the driving wheel 231 in a transmission manner. The first driven wheel 232 and the second driven wheel 233 are arranged vertically at intervals and are both engaged with the driving wheel 231. When the driving wheel 231 rotates, it can drive the first driven wheel 232 and the second driven wheel 233 to rotate simultaneously. The drilling unit 1 is arranged on the first driven wheel 232 and vertically penetrates the second driven wheel 233 and the mounting frame 21. The first connecting sleeve 33 is arranged on the second driven wheel 233 and is located on the side of the mounting frame 21 away from the second driven wheel 233.

[0059] When drilling operations are carried out, the rotating motor 22 drives the driving wheel 231 to rotate, thereby driving the first driven wheel 232 and the second driven wheel 233 to rotate simultaneously. The first driven wheel 232 drives the drilling unit 1 to rotate vertically, enabling the drilling unit 1 to carry out drilling operations on the ground. The second driven wheel 233 drives the first connecting sleeve 33 to rotate, and further enables the first connecting sleeve 33 to drive the slurry spraying assembly 42 and the stirring member 43 to rotate.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A slurry spraying device for a cement-soil mixing pile, characterized in that, Comprising: A drilling unit (1); A rotary driving unit (2), which is in transmission connection with the drilling unit (1), and the rotary driving unit (2) is used to drive the drilling unit (1) to rotate around the vertical direction so that the drilling unit (1) drills holes on the ground; An injection unit (3), including an injection pipe (31), an injection mechanism (32) and a first connecting sleeve (33), the injection pipe (31) is configured to communicate with a container storing mortar, the first connecting sleeve (33) is sleeved on the drilling unit (1) to form a first chamber (34) with the drilling unit (1), the injection pipe (31) communicates with the first chamber (34) through the injection chamber of the injection mechanism (32), and the rotary driving unit (2) is in transmission connection with the first connecting sleeve (33); A mortar spraying unit (4), at least one is provided, the mortar spraying unit (4) includes a second connecting sleeve (41) and a plurality of mortar spraying components (42), the second connecting sleeve (41) is sleeved outside the first connecting sleeve (33) and is detachably connected to the first connecting sleeve (33), the plurality of mortar spraying components (42) are arranged at intervals along the circumferential direction of the second connecting sleeve (41), the mortar spraying components (42) communicate with the first chamber (34) and are used to spray mortar into the drilled hole, and each mortar spraying component (42) is provided with at least one stirring member (43), and the stirring member (43) can stir the mortar to make the mortar in the drilled hole evenly distributed.

2. The grouting device for a cement-soil mixing pile according to claim 1, characterized in that, The mortar spraying component (42) includes a grouting channel (421) and a spraying member (422) that communicate with each other. One end of the grouting channel (421) away from the spraying member (422) is arranged on the second connecting sleeve (41), and the grouting channel (421) communicates with the first chamber (34), and the stirring member (43) is arranged on the grouting channel (421).

3. The grouting device for a soil-cement mixing pile according to claim 1, characterized in that, The drilling unit (1) includes a connecting rod (11), a mounting table (12) and a first drill bit (13) connected in sequence. One end of the connecting rod (11) away from the mounting table (12) is in transmission connection with the rotary driving unit (2), the first connecting sleeve (33) is sleeved outside the connecting rod (11) and abuts against the mounting table (12), and the cross-sectional area of the mounting table (12) is greater than or equal to the cross-sectional area of the first connecting sleeve (33).

4. The grouting device for a cement-soil mixing pile according to claim 3, characterized in that, The first drill bit (13) includes a conical drill bit.

5. The grouting device for a soil-cement mixing pile according to claim 3, characterized in that, The drilling unit (1) further includes a plurality of second drill bits (14), and the plurality of second drill bits (14) are arranged at intervals along the circumferential direction of the mounting table (12).

6. The grouting device for the soil-cement mixing pile according to claim 3, characterized in that, One end of the connecting rod (11) close to the rotary driving unit (2) is provided with a second chamber (111) and an injection hole (112), the second chamber (111) communicates with the injection chamber of the injection mechanism (32), and the first chamber (34) communicates with the second chamber (111) through the injection hole (112).

7. The grouting device for the soil-cement mixing pile according to any one of claims 1-6, characterized in that, The cement-soil mixing pile spraying device further comprises a fastener (5); the second connecting sleeve (41) is provided with a plurality of insertion holes (411) spaced apart along the circumference; the first connecting sleeve (33) is provided with a plurality of threaded holes (331) spaced apart along the circumference; the insertion holes (411) correspond to the threaded holes (331) in a one-to-one manner; and the fastener (5) can pass through the insertion holes (411) and be threadedly engaged with the threaded holes (331).

8. The slurry spraying device for the cement-soil mixing pile according to any one of claims 1-6, characterized in that, The rotary drive unit (2) comprises a mounting frame (21), a rotary motor (22) and a transmission assembly (23); the transmission assembly (23) is arranged in the mounting frame (21); the housing of the rotary motor (22) is arranged in the mounting frame (21); the output end of the rotary motor (22) is in transmission connection with the transmission assembly (23); and the drilling unit (1) and the first connecting sleeve (33) are both arranged on the transmission assembly (23).

9. The grouting device for a cement-soil mixing pile according to claim 8, wherein, The transmission assembly (23) comprises a driving wheel (231), a first driven wheel (232) and a second driven wheel (233); the output end of the rotating motor (22) is connected to the driving wheel (231); the first driven wheel (232) and the second driven wheel (233) are arranged at intervals in the vertical direction and are meshed with the driving wheel (231); the drilling unit (1) is arranged on the first driven wheel (232) and vertically penetrates the second driven wheel (233) and the mounting frame (21); the first connecting sleeve (33) is arranged on the second driven wheel (233) and is located on a side of the mounting frame (21) away from the second driven wheel (233).

10. The grouting device for a soil-cement mixing pile according to any one of claims 1-6, characterized in that, The cement-soil mixing pile spraying device comprises a plurality of the spraying units (4), and the plurality of the spraying units (4) are arranged at intervals along the axial direction of the first connecting sleeve (33).

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