Concreting machine for construction of deep foundation pit support with high-pressure rotary jet reinforced cement-soil pile anchor

Abstract

This application relates to the technical field of concrete pouring equipment, and discloses a pouring machine for the construction of high-pressure rotary jet grouted reinforced soil-cement pile anchor deep foundation pit support, including a connecting pipe and a drill bit. An injection pipe and a water pipe are arranged inside the drill pipe. A dispersion chamber is arranged inside the connecting pipe. The injection pipe and the water pipe are both communicated with the dispersion chamber. An output pipe and a plugging pipe capable of plugging the output pipe are arranged inside the dispersion chamber. The output pipe is communicated with the outflow port. In this pouring machine for the construction of high-pressure rotary jet grouted reinforced soil-cement pile anchor deep foundation pit support, a dispersion chamber is arranged between the nozzle and the injection pipe. When the cement slurry in the injection pipe begins to coagulate and the fluidity decreases, the flushing water input by the water pipe can directly disperse the cement slurry about to coagulate in the dispersion chamber, quickly cleaning the cement slurry in the nozzle. Secondly, it can judge the blockage of the nozzle in time by the increase in pressure in the dispersion chamber, and can quickly flush the dispersion chamber and the nozzle to prevent further coagulation and blockage of the cement slurry in the injection pipe.

Description

Technical Field

[0001] This application relates to the technical field of concrete pouring equipment, and particularly to a pouring machine for the construction of high-pressure rotary jet reinforced cement-soil pile anchors for deep foundation pit support. Background Technique

[0002] The high-pressure rotary jet method pile uses high-pressure equipment to spray cement slurry in the form of a high-pressure jet through a nozzle, impact and damage the soil body, and stir the slurry and the soil body to form a consolidated body. The structure of the pouring machine used in its construction mainly includes drilling equipment, high-pressure pumps, high-pressure machines, jet pipes, and cement slurry preparation equipment, etc.

[0003] During construction, cement transportation is a key link affecting the quality of pile formation and construction efficiency. Due to the caking of cement slurry, the nozzle will be blocked. When the nozzle is blocked, the flow of cement slurry slows down, which is likely to cause the jet pipeline to be blocked. Therefore, when a blockage occurs, the pump needs to be stopped immediately and the pipeline needs to be flushed with clean water, which affects the construction efficiency.

[0004] Secondly, existing equipment usually judges whether a blockage occurs through a pressure gauge and a flow meter, and the judgment is relatively lagged, and generally it can only be found when the blockage becomes relatively serious. Summary of the Invention

[0005] This application proposes a pouring machine for the construction of high-pressure rotary jet reinforced cement-soil pile anchors for deep foundation pit support. An impact chamber is provided between the nozzle and the slurry delivery pipe. When the slurry delivery pipe is blocked, it can directly disperse the cement slurry about to solidify in the impact chamber, quickly clean the cement slurry in the nozzle, and at the same time, it can also judge the blockage of the nozzle in time by the increase in pressure in the impact chamber, avoiding further solidification and blockage of the cement slurry in the slurry delivery pipe.

[0006] To achieve the above object, this application adopts the following technical solutions: A pouring machine for the construction of high-pressure rotary jet reinforced cement-soil pile anchors for deep foundation pit support, including a drill pipe. A connecting pipe and a drill bit are fixedly connected below the drill pipe. A slurry delivery pipe and a water pipe are arranged inside the drill pipe. The slurry delivery pipe and the water pipe are connected to a high-pressure mud pump and a water pump on the ground through a high-pressure rotary joint. A pressure gauge capable of detecting the grouting pressure is arranged on the slurry delivery pipe. An impact chamber is arranged inside the connecting pipe. The slurry delivery pipe and the water pipe are both communicated with the impact chamber. The impact chamber is communicated with a nozzle. An output pipe and a blocking pipe capable of blocking the output pipe are arranged inside the impact chamber. The output pipe is communicated with a flow outlet. The flow outlet is located above the nozzle. The inner diameter of the flow outlet is larger than that of the nozzle. A sensor capable of sensing the pressure change in the impact chamber is arranged inside the connecting pipe;

[0007] When it is detected that the grouting pressure increases abnormally, the staff triggers or automatically triggers the opening of the output pipe and intermittently inputs a set amount of flushing water into the impact chamber through the water pipe until the cement slurry in the slurry delivery pipe is completely replaced. The intermittent duration is long enough for the cement slurry in the impact chamber to be completely flushed out;

[0008] When the sensor senses that the pressure in the flushing chamber increases abnormally, the staff triggers or automatically triggers the opening of the output pipe and inputs a set amount of flushing water into the flushing chamber through the water pipe. The elongation of the telescopic pipe and the water injection duration of the water pipe are sufficient for the cement slurry in the flushing chamber to be completely flushed out.

[0009] Furthermore, a fixed plate and a movable plate are provided inside the connecting pipe. The fixed plate is fixedly connected to the connecting pipe, the movable plate is movably connected to the connecting pipe, a spring is provided between the movable plate and the end of the connecting pipe, and the spring pressure makes the movable plate tightly adhere to the limiting structure. A flushing chamber is formed between the fixed plate and the movable plate. The fixed plate is fixedly connected to the output pipe, the movable plate is fixedly connected to the blocking pipe. When the movable plate tightly adheres to the limiting structure, the blocking pipe blocks the lower end of the output pipe. A telescopic pipe is provided between the fixed plate and the movable plate, and the telescopic pipe can drive the movable plate to move. By controlling the telescopic movement of the telescopic pipe, the opening or closing of the output pipe is controlled. The sensor is used to sense the pressure between the movable plate and the limiting structure.

[0010] Furthermore, a telescopic bladder is provided between the fixed plate and the movable plate, and the flushing chamber is located inside the telescopic bladder.

[0011] Furthermore, the telescopic pipe is a hydraulic rod, and the telescopic pipe is communicated with the water pipe. After the water pump is started, the pressure of the flushing water drives the telescopic pipe to elongate.

[0012] Furthermore, the middle part of the blocking pipe is hollow, and the blocking pipe is communicated with the water pipe. After the cement slurry condensed in the pipeline is cleaned up and the movable plate gradually returns to its original position, after the blocking pipe blocks the output pipe, the blocking pipe still sprays water for a period of time to clean up the residual cement slurry in the output pipe, avoiding the cement slurry from blocking the output pipe and the outflow port.

[0013] Furthermore, the water pipe is communicated with the flushing chamber through a water spraying assembly. Since the flushing chamber is filled with high-pressure cement slurry, in order to prevent the cement slurry from flowing back into the water spraying assembly, the water spraying assembly includes a spray water pipe communicated with the water pipe and an isolation sleeve fixedly connected to the movable plate. The inner diameter of the isolation sleeve is larger than the outer diameter of the spray water pipe. The isolation sleeve is fixedly connected to a conical plug. When the movable plate tightly adheres to the limiting structure, the conical plug blocks the end of the spray water pipe. When the spray water pipe and the conical plug are re-combined, the spray water pipe maintains the water spraying state. Multiple groups of opposite communication holes are provided at the bottom of the side wall of the isolation sleeve.

[0014] Furthermore, the water flow sprayed by the blocking pipe is sprayed in a scattered form, and a sleeve cover capable of sleeving the blocking pipe is provided at the bottom of the output pipe. The sleeve cover makes the scattered water flow concentrate on the inner wall of the output pipe, ensuring that when the blocking pipe is inserted into the output pipe, the sediment on the inner wall of the output pipe is washed away.

[0015] Furthermore, the outlet is movably connected with a cover plate. Under the action of elastic force, the cover plate is tightly attached to the end of the outlet. The cover plate opens outward, tilts from top to bottom towards the drill pipe, and the hinge shaft of the cover plate is located below. The acting force of the return slurry on the cover plate tends to close the outlet. An intermediate cavity is provided between the outlet and the output pipe, and the water pump supplies water to the blocking pipe regularly to flush the output pipe and the outlet.

[0016] The beneficial effects of the present invention are as follows:

[0017] A pouring machine for the construction of a high-pressure jet grouting and reinforced soil-cement pile anchor deep foundation pit support provided by the present application is provided with a flushing cavity between the nozzle and the slurry conveying pipe. When the cement slurry in the slurry conveying pipe begins to coagulate and its fluidity decreases, the flushing water input by the water pipe can directly flush the cement slurry about to coagulate in the flushing cavity, quickly clean the cement slurry in the nozzle, and ensure the continuity of the construction.

[0018] Secondly, it can timely judge the blockage of the nozzle by the increase in pressure in the flushing cavity, and can quickly flush the flushing cavity and the nozzle to avoid further coagulation and blockage of the cement slurry in the slurry conveying pipe, resulting in the interruption of the construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings:

[0020] Figure 1 It is a partial front view of the present invention;

[0021] Figure 2 It is a three-dimensional structure diagram of the present invention;

[0022] Figure 3 In the present invention Figure 1 Partial cross-sectional view;

[0023] Figure 4 It is a connection schematic diagram of the water pipe, the telescopic pipe, the blocking pipe and the water spraying assembly in the present invention;

[0024] Figure 5 It is a schematic diagram of the water spraying assembly in the present invention;

[0025] Figure 6 It is a schematic diagram of the blocking pipe and the output pipe in the present invention;

[0026] Figure 7 In the present invention Figure 1 Enlarged view of A;

[0027] In the figure: 1, drill pipe; 2, connecting pipe; 3, drill bit; 4, spray head; 5, outflow port; 6, slurry delivery pipe; 7, water pipe; 8, fixed plate; 9, movable plate; 10, inductor; 11, output pipe; 12, plugging pipe; 13, telescopic pipe; 14, cover plate; 15, telescopic bladder; 16, control valve; 17, water spraying assembly; 171, water spraying pipe; 172, isolation sleeve; 173, conical plug; 174, communication hole; 18, sleeve; 19, intermediate cavity. Specific implementation manner

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1. Please refer to Figures 1-3 , the pouring machine for the construction of the high-pressure rotary jet grouted reinforced cement-soil pile anchor deep foundation pit support, including a drill pipe 1. A connecting pipe 2 and a drill bit 3 are fixedly connected below the drill pipe 1. A slurry delivery pipe 6 and a water pipe 7 are arranged inside the drill pipe 1. The slurry delivery pipe 6 and the water pipe 7 are connected to a high-pressure mud pump and a water pump on the ground through a high-pressure rotary joint. The high-pressure rotary joint is generally arranged at the top of the drill pipe 1. Figures 1-3The high-pressure rotary joint is not shown in the figure. A fixed plate 8 and a movable plate 9 are arranged inside the connecting pipe 2. The fixed plate 8 is fixedly connected to the connecting pipe 2, and the movable plate 9 is movably connected to the connecting pipe 2. A spring is arranged between the movable plate 9 and the end of the connecting pipe 2. The spring is pre-compressed, and the pressure acts on the movable plate 9 to make the movable plate 9 close to the limiting structure. An erosion chamber is formed between the fixed plate 8 and the movable plate 9. The spring pressure makes the erosion chamber tend to become smaller. The slurry conveying pipe 6 and the water pipe 7 are both communicated with the erosion chamber. The erosion chamber is communicated with a spray head 4 through a hose. The spray head 4 penetrates through the side wall of the connecting pipe 2. The hose can adapt to the up and down movement of the movable plate 9. The slurry conveying pipe 6 conveys high-pressure cement slurry into the erosion chamber, then flows from the erosion chamber to the spray head 4 and is sprayed out from the spray head 4. An output pipe 11 is arranged in the erosion chamber. The output pipe 11 penetrates through the fixed plate 8 and is fixedly connected to the fixed plate 8. A blocking pipe 12 is arranged at the position of the movable plate 9 corresponding to the output pipe 11. When the movable plate 9 is close to the limiting structure, the blocking pipe 12 blocks the lower end of the output pipe 11. The output pipe 11 is communicated with the flow outlet 5. The flow outlet 5 is located above the spray head 4. The inner diameter of the flow outlet 5 is larger than that of the spray head 4. The flow outlet 5 can make the cement slurry flow out quickly. A telescopic pipe 13 is arranged between the fixed plate 8 and the movable plate 9. The telescopic pipe 13 can drive the movable plate 9 to move. When the cement slurry in the pipeline begins to coagulate, its fluidity decreases and the grouting pressure increases. When the grouting pressure becomes abnormally large, abnormally large means that the grouting pressure is greater than the set value or the instantaneous change amount of the pressure is greater than the set value, the staff triggers or automatically triggers the telescopic pipe 13 and turns on the water pump to inject water into the erosion chamber through the water pipe 7. The telescopic pipe 13 extends to drive the movable plate 9 to move, and the blocking pipe 12 and the output pipe 11 are separated. The coagulated cement in the erosion chamber flows along the output pipe 11 to the flow outlet 5 and is sprayed out from the flow outlet 5. The sprayed slurry returns to the ground to replace the coagulated cement in the pipeline, avoiding pipeline blockage and not disturbing the construction. An inductor 10 is arranged between the movable plate 9 and the limiting structure. When the spray head 4 is blocked, the pressure in the erosion chamber increases abnormally. When the pressure can overcome the spring pressure, the movable plate 9 will move under the pressure, and the blocking pipe 12 and the output pipe 11 are separated. After the inductor 10 detects the movement of the movable plate 9, it triggers the telescopic pipe 13 to act and simultaneously triggers the water pump to turn on. In other embodiments, the inductor 10 can directly detect the pressure in the erosion chamber. High-pressure water flows into the erosion chamber through the water pipe 7. At the same time, the blocking pipe 12 and the output pipe 11 are separated. The cement slurry in the erosion chamber is flushed into the output pipe 11 and is sprayed out from the flow outlet 5. At the same time, the water can also wash away the mud block blocking the spray head 4. The pressure in the water pipe 7 is greater than the pressure in the slurry conveying pipe 6. When the water pipe 7 injects water into the erosion chamber, the flushing water in the water pipe preferentially flows into the erosion chamber.

[0030] A telescopic bladder 15 is arranged between the fixed plate 8 and the movable plate 9. The erosion chamber is located inside the telescopic bladder 15. The cement slurry is enclosed in the telescopic bladder 15, which will not pollute the inner wall of the connecting pipe 2 and does not affect the up and down movement of the movable plate 9. The inductor 10 is located outside the telescopic bladder 15.

[0031] Please refer to Figures 2-4 , the telescopic pipe 13 is a hydraulic rod, the telescopic pipe 13 is connected to the water pipe 7, a control valve 16 is provided between the water pipe 7 and the telescopic pipe 13. When the staff triggers the telescopic pipe 13, the control valve 16 opens. After the water pump is turned on, the pressure of the flushing water drives the telescopic pipe 13 to extend. The control valve 16 is located at the top of the fixing plate 8.

[0032] The middle part of the plugging pipe 12 is hollow, the plugging pipe 12 is connected to the water pipe 7, and the water pipe 7 passes through the telescopic bladder 15 and the flushing cavity and is connected to the plugging pipe 12. After the cement slurry condensed in the pipeline is cleaned up, the water pump is turned off, the movable plate 9 gradually resets, and after the plugging pipe 12 blocks the output pipe 11, the plugging pipe 12 still sprays water for a period of time to clean up the residual cement slurry in the output pipe 11, preventing the cement slurry from blocking the output pipe 11 and the outflow port 5.

[0033] Please refer to Figure 2 and Figure 5 , the water pipe 7 is connected to the flushing cavity through the water spraying assembly 17. Since the flushing cavity is filled with high-pressure cement slurry, in order to prevent the cement slurry from flowing back into the water spraying assembly 17, the water spraying assembly 17 includes a water spraying pipe 171 connected to the water pipe 7 and an isolation sleeve 172 fixedly connected to the movable plate 9. The inner diameter of the isolation sleeve 172 is larger than the outer diameter of the water spraying pipe 171. The isolation sleeve 172 is fixedly connected to a conical plug 173. When the movable plate 9 abuts against the limiting structure, the conical plug 173 blocks the end of the water spraying pipe 171. Moreover, when the water spraying pipe 171 and the conical plug 173 are re-combined, the water spraying pipe 171 remains in the water spraying state to wash the conical plug 173. When the water spraying pipe 171 is first inserted into the isolation sleeve 172, the isolation sleeve 172 makes the water flow concentrated, so that the conical plug 173 is washed more cleanly, preventing debris from getting stuck between the water spraying pipe 171 and the conical plug 173. Multiple groups of opposite communication holes 174 are provided at the bottom of the side wall of the isolation sleeve 172 to keep the cement slurry in the isolation sleeve 172 flowing, preventing the cement slurry from solidifying in the isolation sleeve 172.

[0034] In order to ensure that when the plugging pipe 12 and the output pipe 11 are combined, they are not stuck by the sand and gravel in the cement slurry, please refer to Figure 2 and Figure 6 , the water sprayed from the plugging pipe 12 is sprayed in a scattered form, and the scattered cement flushes the inner wall of the output pipe 11. In order to increase the pressure of the water flushing, a sleeve 18 that can sleeve the plugging pipe 12 is provided at the bottom of the output pipe 11. The sleeve 18 makes the scattered water flow concentrated on the inner wall of the output pipe 11, ensuring that when the plugging pipe 12 is inserted into the output pipe 11, the sediment on the inner wall of the output pipe 11 is washed away.

[0035] Please refer to Figure 4 and Figure 7, the outflow port 5 is movably connected with a cover plate 14. The cover plate 14 is pressed against the end of the outflow port 5 under the action of elastic force. The cover plate 14 opens outward. From top to bottom, the cover plate 14 inclines towards the drill pipe 1. The hinge shaft of the cover plate 14 is located below. The acting force of the returned slurry acts on the cover plate 14 and tends to close the outflow port 5 to prevent the returned slurry flowing along the pilot hole from flowing into the outflow port 5. An intermediate cavity 19 is provided between the outflow port 5 and the output pipe 11. A small amount of returned slurry flowing into the outflow port 5 is dispersed in the intermediate cavity 19 and will not coagulate. In order to ensure that the intermediate cavity 19 and the outflow port 5 are not blocked by the returned slurry, the blocking pipe 12 sprays water regularly. In this embodiment, control valves 16 are provided between the water spraying assembly 17, the telescopic pipe 13 and the water pipe 7. The water pump supplies water to the blocking pipe 12 regularly to wash the output pipe 11 and the outflow port 5.

[0036] During pouring, the drill pipe 1 rotates while rising, and the cement slurry sprays out from the nozzle 4. When the cement slurry is about to coagulate, its fluidity decreases and the grouting pressure increases. When the grouting pressure is higher than the set value or the staff judges that the grouting pressure is abnormal, the water pump and the control valve 16 are triggered to open. The telescopic pipe 13 elongates under the water pressure, driving the movable plate 9 to move. The blocking pipe 12 and the output pipe 11 are separated, and the water spraying pipe 171 and the conical plug 173 are separated. The water flows into the flushing cavity to wash the cement slurry in the flushing cavity and the cement blocks on the nozzle 4, so that the cement slurry quickly flows out from the nozzle 4 and the outflow port 5. The cement slurry sprayed out from the outflow port 5 flows back along the pilot hole to the ground. When the flushing reaches the set duration, the water pump is closed and waits for the set duration. After the flushing cavity is filled with cement slurry again, the water pump is started again, and this is repeated for the set number of times until the about-to-coagulate cement slurry in the slurry conveying pipe 6 is replaced. Finally, the output power of the water pump is reduced, the water pressure decreases, the movable plate 9 gradually resets, and at the same time, the isolation sleeve 172 and the blocking pipe 12 maintain the water spraying state to wash away the nearby sediment. After ensuring that the water spraying pipe 171 and the output pipe 11 are completely blocked, the water pump and the control valve 16 are closed. When the cement slurry locally coagulates to form cement blocks that block the nozzle 4, increasing the pressure in the flushing cavity, when the sensor 10 senses the movement of the movable plate 9, the water pump and the control valve 16 are triggered to open. After flushing the flushing cavity and the nozzle 4, the output power of the water pump is reduced and the output pressure is reduced. After the movable plate 9 resets, the water pump and the control valve 16 are closed.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-pressure rotary grouting reinforced cement soil pile anchor deep foundation pit support construction pouring machine, comprising a drill rod (1), a connecting pipe (2) and a drill bit (3) are fixedly connected to the bottom of the drill rod (1), a grouting pipe (6) and a water pipe (7) are provided inside the drill rod (1), the grouting pipe (6) and the water pipe (7) are connected to a high-pressure mud pump and a water pump on the ground through a high-pressure rotary joint, and a pressure gauge capable of detecting grouting pressure is provided on the grouting pipe (6), characterized in that: The connecting pipe (2) is provided with a dispersing cavity, the slurry delivery pipe (6) and the water pipe (7) are both in communication with the dispersing cavity, the dispersing cavity is in communication with a nozzle (4), an output pipe (11) and a blocking pipe (12) capable of blocking the output pipe (11) are provided in the dispersing cavity, the output pipe (11) is in communication with an outflow port (5), the outflow port (5) is located above the nozzle (4), the inner diameter of the outflow port (5) is larger than the inner diameter of the nozzle (4), and a sensor (10) capable of sensing pressure changes in the dispersing cavity is provided in the connecting pipe (2); A fixed plate (8) and a movable plate (9) are provided in the connecting tube (2); the fixed plate (8) is fixedly connected to the connecting tube (2); the movable plate (9) is movably connected to the connecting tube (2); a spring is provided between the movable plate (9) and the end of the connecting tube (2); the spring pressure causes the movable plate (9) to be pressed against the limiting structure; a dispersion cavity is formed between the fixed plate (8) and the movable plate (9); the fixed plate (8) is fixedly connected to the output tube (11); the movable plate (9) is fixedly connected to the blocking tube (12); when the movable plate (9) is pressed against the limiting structure, the blocking tube (12) blocks the lower end of the output tube (11); a telescopic tube (13) is provided between the fixed plate (8) and the movable plate (9); the telescopic tube (13) can drive the movable plate (9) to move; and the output tube (11) is opened or closed by controlling the telescopic tube (13) to be extended or retracted; and the sensor (10) is used to sense the pressure between the movable plate (9) and the limiting structure; When an abnormal increase in grouting pressure is detected, the staff triggers or automatically triggers the output pipe (11) to open and intermittently inputs a set amount of flushing water into the flushing cavity through the water pipe (7) until the cement slurry in the slurry delivery pipe (6) is completely replaced. The intermittent time and water consumption are sufficient to completely flush out the cement slurry in the flushing cavity; When the sensor (10) senses that the pressure in the flushing chamber increases abnormally, the staff triggers or automatically triggers the output pipe (11) to open and input flushing water into the flushing chamber through the water pipe (7). The extension of the telescopic pipe (13) and the injection of water into the water pipe (7) are long enough for the cement slurry in the flushing chamber to be completely flushed out.

2. The high-pressure rotary grouting reinforced cement soil pile anchor deep foundation pit support construction casting machine according to claim 1 is characterized in that: A telescopic bag (15) is provided between the fixed plate (8) and the movable plate (9), and the dispersion cavity is located inside the telescopic bag (15).

3. The high-pressure rotary grouting reinforced cement soil pile anchor deep foundation pit support construction casting machine according to claim 1 is characterized in that: The telescopic tube (13) is a hydraulic rod. The telescopic tube (13) is connected to the water pipe (7). After the water pump is turned on, the pressure of the flushing water drives the telescopic tube (13) to extend.

4. The high-pressure rotary grouting reinforced cement soil pile anchor deep foundation pit support construction casting machine according to claim 3, characterized in that: The middle of the blocking pipe (12) is hollow and connected to the water pipe (7). After the cement slurry solidified in the pipeline is cleaned, the movable plate (9) is gradually reset, and after the blocking pipe (12) blocks the output pipe (11), the blocking pipe (12) continues to spray water for a period of time.

5. The high-pressure rotary grouting reinforced cement soil pile anchor deep foundation pit support construction casting machine according to claim 4, characterized in that: The water pipe (7) is connected to the dispersing chamber via a water spray assembly (17). The water spray assembly (17) comprises a water spray pipe (171) connected to the water pipe (7) and an isolation sleeve (172) fixedly connected to the movable plate (9). The inner diameter of the isolation sleeve (172) is larger than the outer diameter of the water spray pipe (171). The isolation sleeve (172) is fixedly connected to a conical plug (173). When the movable plate (9) is close to the limiting structure, the conical plug (173) blocks the end of the water spray pipe (171). When the water spray pipe (171) and the conical plug (173) are reconnected, the water spray pipe (171) maintains a water spraying state. The bottom of the side wall of the isolation sleeve (172) is provided with a plurality of groups of relative communication holes (174).

6. The high-pressure rotary grouting reinforced cement soil pile anchor deep foundation pit support construction casting machine according to claim 5, characterized in that: The water flow sprayed out by the blocking pipe (12) is sprayed out in a scattered manner, and the bottom of the output pipe (11) is provided with a sleeve cover (18) capable of sleeve-covering the blocking pipe (12).

7. The high-pressure rotary grouting reinforced cement soil pile anchor deep foundation pit support construction casting machine according to claim 4, characterized in that: The outflow port (5) is movably connected to a cover plate (14), the cover plate (14) being in close contact with the end of the outflow port (5) under the action of elastic force, the cover plate (14) opening outwards, the cover plate (14) tilting from top to bottom towards the drill pipe (1), the hinge axis of the cover plate (14) being located at the bottom, an intermediate cavity (19) being provided between the outflow port (5) and the output pipe (11), the water pump supplying water to the blocking pipe (12) at a fixed time to flush the output pipe (11) and the outflow port (5).

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