A high-pressure jet grouting pile reinforcement technology applicable to red-bed soft rock landfill sites

Abstract

This application relates to the field of construction technology, and specifically discloses a high-pressure jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites, including leveling and compacting the red-bed soft rock, driving the jet grouting drill pipe to descend through a lifting mechanism, jetting high-pressure water to cut the soil body, and pouring slurry. During this process, the reinforcement mechanism can slap and reinforce the inner wall of the hole, thereby reducing the possibility of the hole collapsing under the cutting of high-pressure water. At the same time, the measuring mechanism can measure the reaction force feedback by the inner wall of the hole during slapping, so as to judge the different geological layers where the jet grouting drill pipe is located, and then control the high-pressure water pump to adjust different gears, so that the high-pressure water can change the cutting ability of the high-pressure water according to the strength of the soil structure of different geological layers, making the jet grouting pile after construction as consistent with the design as possible. Both reduce the construction error of the jet grouting pile after construction, thereby ensuring the structural strength of the jet grouting pile.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to a high-pressure jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites. Background Art

[0002] The high-pressure jet grouting method is to use a drill rig to drill a drill pipe with a slurry nozzle and a high-pressure water nozzle to a predetermined position in the soil layer, and then use a high-pressure device to eject water from the nozzle to cut, disturb, and damage the soil, thereby forming a hole with a designed size. When the drill pipe reaches the designed elevation, the drill pipe is gradually lifted at a certain speed, and the slurry nozzle ejects slurry. After the slurry solidifies, a cylindrical consolidation body (i.e., a jet grouting pile) is formed in the soil to achieve the purpose of reinforcing the foundation or preventing water seepage.

[0003] Red-bed soft rock is a clastic sedimentary rock layer with a mainly red appearance. The clay minerals contained in the red-bed soft rock make it prone to disintegration when exposed to water. During the process of using the high-pressure jet grouting method to reinforce the red-bed soft rock landfill site, the ejected slurry or water will cut and damage the soil, and the clay minerals in the red-bed soft rock are prone to disintegration when exposed to water, causing the soil in the hole to collapse, resulting in changes in the volume and cross-sectional area of the excavated hole;

[0004] Moreover, during the excavation process, due to different geological layers at different depths, the soil layer may pass through silty clay layer, muddy fine sand layer, gravel pebble layer, etc. from top to bottom. The soil structure strengths of different geological layers are different, and the intensity of the high-pressure jet ejected from the nozzle is constant. Therefore, the degree of damage of the high-pressure jet to geological layers with different structural strengths is different. Under the same high-pressure jet intensity, the degree of damage of the jet to the geological layer with weak structural strength is greater, resulting in different diameters of the holes cut in different geological layers.

[0005] Combining the above two points, both will cause the sizes of the cut holes to be different, resulting in a large difference between the shape and volume of the formed consolidation body and the designed size, thereby affecting the structural strength of the consolidation body. Summary of the Invention

[0006] In order to improve the structural strength of the consolidation body after construction, the present application provides a high-pressure jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites.

[0007] A high-pressure jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites provided by the present application adopts the following technical solutions:

[0008] A high-pressure jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites includes the following steps:

[0009] S1: Level and compact the red-bed soft rock landfill site, install the drill rig at the predetermined construction location, and adjust the inclination of the drill pipe to be perpendicular to the ground;

[0010] S2: Drive the jet grouting drill pipe to descend through the lifting mechanism, drive the jet grouting drill pipe to rotate through the driving mechanism, turn on the high-pressure water pump, and make the jet grouting rod eject high-pressure water while rotating downward to cut the soil, thereby forming a hole for grouting;

[0011] A reinforcement mechanism for reinforcing the inner wall of the hole is provided on the jet grouting drill pipe, and the reinforcement mechanism can drive the inner wall of the hole to be slapped and reinforced during the rotation of the jet grouting drill pipe;

[0012] The reinforcement mechanism is also provided with a measuring mechanism for measuring the reaction force generated by slapping the inner wall of the hole. The measuring mechanism is connected to an external control mechanism, and different data is used to judge the different geological layers where the end of the jet grouting drill pipe is located, so as to adjust the high-pressure water pump to different gears;

[0013] S3: The jet grouting drill pipe is drilled to the design elevation, the mud pump is turned on, and at the same time the jet grouting drill pipe is lifted, so that the mud forms a jet grouting pile in the hole, thereby realizing the reinforcement of the formation.

[0014] By adopting the above technical solution, during the process of lowering the jet grouting drill pipe, the reinforcement mechanism can slap and reinforce the inner wall of the hole, thereby reducing the possibility of the hole collapsing under the cutting of high-pressure water;

[0015] During the slapping and reinforcement, the measuring mechanism can measure the reaction force feedback by the inner wall of the hole during slapping, thereby judging the different geological layers where the jet grouting drill pipe is located;

[0016] The external control mechanism is used to control the high-pressure water pump to adjust different gears, so that the high-pressure water can change the cutting ability of the high-pressure water according to the strength of the soil structure of different geological layers, so that the jet grouting pile after construction is as consistent with the design as possible. Both reduce the construction error of the jet grouting pile after construction, thereby ensuring the structural strength of the jet grouting pile.

[0017] Optionally, the reinforcement mechanism in step S2 includes an installation cylinder fixed to the lifting end of the lifting mechanism, a plurality of slapping components arranged on the peripheral wall of the installation cylinder, and a driving member arranged on the outer peripheral wall of the jet grouting drill pipe and used to drive the slapping components to repeatedly slap the inner wall of the hole.

[0018] By adopting the above technical solution, the driving mechanism drives the jet grouting drill pipe to rotate, so that the driving member drives the slapping components to slap and reinforce the inner wall of the hole, reducing the possibility of the inner wall of the hole collapsing after being cut by high-pressure water, making the shape of the subsequent formed jet grouting pile more consistent with the design, and ensuring the stability of the construction quality of the jet grouting pile.

[0019] Optionally, a plurality of flapping openings are formed in the outer peripheral wall of the installation cylinder, and a plurality of groups of flapping assemblies are correspondingly arranged for each of the flapping openings; the flapping assembly includes a flapping plate slidably clamped in the flapping opening, a push rod fixed to one side of the flapping plate and extending into the inner cavity of the installation cylinder, and a reset member for driving the flapping plate to reset, and the driving member can drive the push rod to move outward of the flapping opening.

[0020] By adopting the above technical solution, when the jet grouting drill rod drives the driving member to rotate, the driving member drives the push rod to move, the push rod drives the flapping plate to extend out of the flapping opening, and the inner peripheral wall of the hole is flapped and reinforced. After flapping, the flapping plate is reset under the action of the reset member;

[0021] The jet grouting drill rod rotates continuously, which can drive the flapping plate to repeatedly flap the inner wall of the hole, so as to improve the pile forming quality of the jet grouting pile.

[0022] Optionally, the driving member includes a plurality of arc-shaped convex blocks arranged on the outer peripheral wall of the jet grouting drill rod, and the arc-shaped convex blocks are arranged at intervals along the circumferential direction of the jet grouting drill rod. During the rotation of the arc-shaped convex blocks, the end of the push rod can be driven to move.

[0023] By adopting the above technical solution, when the jet grouting drill rod rotates, the arc-shaped convex blocks will be driven to rotate together, and the arc-shaped convex blocks push the end of the push rod to move, so that the flapping plate flaps and reinforces the inner peripheral wall of the hole.

[0024] Optionally, a roller is arranged at the end of the push rod, and the roller is elastically abutted against the outer peripheral wall of the arc-shaped convex block under the action of the reset member.

[0025] By adopting the above technical solution, when the arc-shaped convex block rotates, it can easily drive the roller to move, thereby driving the push rod and the flapping plate to move.

[0026] Optionally, the roller is rotatably installed at the end of the push rod.

[0027] By adopting the above technical solution, the arc-shaped convex block can drive the roller to move more easily.

[0028] Optionally, the measuring mechanism includes a plurality of pressure sensors corresponding to each of the flapping plates. The flapping plate includes an abutting plate and a pushing plate that are slidably inserted into each other, and the pressure sensor is arranged between the abutting plate and the pushing plate;

[0029] One side of the pushing plate is fixedly connected to the push rod, and an elastic member for connecting the two is arranged between the abutting plate and the pushing plate.

[0030] By adopting the above technical solution, during the process of the flapping plate flapping the inner wall of the hole, the inner wall of the hole will exert an opposite acting force on the abutting plate, causing the abutting plate to press against the pressure sensor. The pressure sensor detects the pressure signal and transmits the pressure signal to an external control mechanism. The control mechanism determines that the jet grouting drill pipe is located in different geological layers based on different signals, and thus adjusts the high-pressure water pump to the corresponding gear, so that the cutting ability of the high-pressure water in different geological layers is different, so as to make the sizes of the holes cut by the high-pressure water in different geological layers consistent.

[0031] Optionally, the side of the abutting plate facing away from the pushing plate is curved and flush with the outer peripheral wall of the mounting cylinder.

[0032] By adopting the above technical solution, the abutting plate is more adapted to the outer peripheral wall of the mounting cylinder, making the mounting cylinder more smooth during the process of lowering the rod.

[0033] Optionally, a limiting component for preventing the abutting plate from being detached and limiting its position is further arranged in the mounting cylinder.

[0034] By adopting the above technical solution, the limiting component can prevent the abutting plate from being detached and limit its position, so that the abutting plate will not be separated from the mounting cylinder during the process of flapping the inner wall of the hole, improving the installation stability of the abutting plate during construction.

[0035] Optionally, a limiting groove for preventing detachment and limiting position is formed in the inner peripheral wall of the mounting cylinder. The limiting component includes a limiting member arranged on the peripheral wall of the abutting plate and a buffer member for buffering the movement of the abutting plate. The limiting member is slidably clamped in the limiting groove, and the buffer member is located in the limiting groove and abuts against the inner wall of the limiting groove and the limiting member respectively.

[0036] By adopting the above technical solution, the limiting member can slide along the limiting groove, and the limiting groove can limit the sliding of the limiting member, thereby limiting the sliding of the abutting plate. During this process, the buffer member can reduce the possibility of damage to the abutting plate caused by flapping the inner wall of the hole, improving the service life of the abutting plate.

[0037] In summary, the present application includes at least one of the following beneficial technical effects:

[0038] 1. The reinforcement mechanism can flap and reinforce the inner wall of the hole, thereby reducing the possibility of the hole collapsing under the cutting of high-pressure water;

[0039] 2. The measuring mechanism can measure the reaction force feedback from the inner wall of the hole during flapping, thereby judging the different geological layers where the jet grouting drill pipe is located, and then controlling the high-pressure water pump to adjust different gears, so that the high-pressure water can change the cutting ability of the high-pressure water according to the strength of the soil structure in different geological layers, making the jet grouting pile after construction as consistent with the design as possible. At the same time, both reduce the construction error of the jet grouting pile after construction, thus ensuring the structural strength of the jet grouting pile. Brief Description of the Drawings

[0040] Figure 1 is a schematic diagram of the overall structure of the drill rig in the embodiment of the present application.

[0041] Figure 2 is Figure 1 a partial structural schematic diagram of the jet grouting drill pipe from the first perspective in

[0042] Figure 3 is Figure 2 a cross-sectional view of the jet grouting drill pipe from the second perspective in

[0043] Reference numerals: 1, drill rig; 11, lifting mechanism; 12, driving mechanism; 2, reinforcement mechanism; 21, installation cylinder; 211, flapping port; 22, flapping assembly; 221, flapping plate; 2211, abutting plate; 2212, pushing plate; 222, push rod; 223, reset member; 23, driving member; 3, elastic member; 4, roller; 5, limiting assembly; 51, limiting member; 52, buffer member; 6, limiting groove; 7, measuring mechanism. Detailed Description of the Embodiment

[0044] The following is a further detailed description of the present application in conjunction with the attached Figures 1-3 , drawings.

[0045] The embodiment of the present application discloses a high-pressure jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites, including the following steps:

[0046] S1: Level and compact the red-bed soft rock landfill site, install the drill rig 1 at the predetermined construction site, and adjust the inclination of the drill pipe to be perpendicular to the ground;

[0047] S2: Drive the jet grouting drill pipe to descend through the lifting mechanism 11, drive the jet grouting drill pipe to rotate through the driving mechanism 12, and turn on the high-pressure water pump, so that the jet grouting drill pipe rotates downward while ejecting high-pressure water to cut the soil, thereby forming a hole for grouting;

[0048] A reinforcement mechanism 2 for reinforcing the inner wall of the hole is provided on the jet grouting drill pipe, and the jet grouting drill pipe can drive the reinforcement mechanism 2 to flap and reinforce the inner wall of the hole during rotation;

[0049] The reinforcement mechanism 2 is also provided with a measuring mechanism 7 for measuring the reaction force generated by patting the inner wall of the hole. The measuring mechanism 7 is connected to an external control mechanism, and different data are used to judge the different geological layers where the end of the jet grouting drill pipe is located, so as to adjust the high-pressure water pump to different gears.

[0050] S3: The jet grouting drill pipe is drilled to the designed elevation, the mud pump is started, and at the same time the jet grouting drill pipe is lifted to form a jet grouting pile in the hole with the mud, so as to realize the reinforcement of the formation.

[0051] Since the red-bed soft rock is prone to collapse when encountering water and the structural strengths of different geological layers are different, during the process of lowering the jet grouting drill pipe, the holes cut by the high-pressure water are prone to collapse, and under the same water pressure, the degree of damage of the high-pressure water to the soil bodies of geological layers with different structural strengths is different. Both of them make the size of the cut holes different from the designed size, resulting in the structural strength of the jet grouting pile after pouring not meeting the construction requirements. Therefore, the present invention makes targeted improvements in this regard.

[0052] During the process of rotating and lowering the jet grouting drill pipe, it will drive the reinforcement mechanism 2 to pat and reinforce the inner wall of the cut hole, reducing the occurrence of the situation where the inner wall of the hole collapses when encountering water. During the patting process, the measuring mechanism 7 can measure the reaction force generated by patting the side wall of the hole and transmit it to the external control mechanism.

[0053] The control mechanism can judge which geological layer the jet grouting drill pipe is in according to the data size, so as to control the high-pressure water pump to adjust to different gears, so that when the jet grouting drill pipe is in a geological layer with low structural strength, the force of the water sprayed by the high-pressure water pump becomes smaller, and when the jet grouting drill pipe is in a geological layer with high structural strength, the force of the water sprayed by the high-pressure water pump is greater.

[0054] Make the sizes of the holes cut by the high-pressure water in different strata the same, so that the size of the finally formed jet grouting pile is as close as possible to the designed size, so as to ensure the construction quality of the jet grouting pile.

[0055] As Figure 1 shown, the drill rig 1 is stably installed on the construction ground. The lifting mechanism 11 provided on the drill rig 1 can drive the jet grouting drill pipe to lift and lower. The driving mechanism 12 provided on the lifting end of the lifting mechanism 11 can drive the jet grouting drill pipe to rotate. The lifting mechanism 11 and the driving mechanism 12 can jointly realize the rotation and lowering of the jet grouting drill pipe. The jet grouting drill pipe is a double-layer pipe structure. The inner layer pipe is used for pumping high-pressure water, and the outer layer pipe is used for pumping mud.

[0056] Specifically, as Figure 2 and Figure 3As shown, the reinforcement mechanism 2 in step S2 includes a mounting tube 21, a beating assembly 22 and a driving member 23, one end of the mounting tube 21 is fixedly mounted on the lifting end of the lifting mechanism 11 by bolts, and the mounting tube 21 is sleeved and mounted outside the rotary jet drill rod, the length direction of the mounting tube 21 is consistent with the length direction of the rotary jet drill rod, and the lower end of the rotary jet drill rod extends out of the end of the mounting tube 21, and the ends of the rotary jet drill rod are respectively installed with a high-pressure nozzle and a mud nozzle;

[0057] There are multiple groups of flapping components 22, and each group of flapping components 22 is arranged circumferentially on the outer peripheral wall of the installation tube 21. In other embodiments, the flapping components 22 can also be arranged at random intervals on the outer peripheral wall of the installation tube 21. This embodiment is only a preferred implementation;

[0058] like Figure 2 and Figure 3 As shown, a plurality of beating openings 211 are circumferentially spaced apart on the outer wall of the mounting tube 21, a plurality of beating assemblies 22 are provided corresponding to the plurality of beating openings 211, and a driving member 23 is provided on the outer wall of the rotary jet drill rod, for driving the beating assembly 22 to repeatedly beat the inner wall of the hole.

[0059] like Figure 2 and Figure 3 As shown, the flapping assembly 22 includes a flapping plate 221, a push rod 222 and a reset member 223. The flapping plate 221 includes an abutting plate 2211 and a pushing plate 2212. The side of the abutting plate 2211 away from the pushing plate 2212 is arranged in a curved surface and is flush with the outer peripheral wall of the mounting tube 21.

[0060] like Figure 2 and Figure 3 As shown, an elastic member 3 for connecting the abutting plate 2211 and the pushing plate 2212 is provided between the two. The elastic member 3 is a pulling spring, and the ends of the pulling spring are respectively connected and fixed to the abutting plate 2211 and the pushing plate 2212. The abutting plate 2211 and the pushing plate 2212 are both slidably installed in the slapping opening 211, and the measuring mechanism 7 is located between the abutting plate 2211 and the pushing plate 2212.

[0061] like Figure 2 and Figure 3 As shown, one end of the push rod 222 is welded and fixed to one side of the push plate 2212, and the other side extends into the inner cavity of the installation tube 21, and the end is rotatably installed with a roller 4; the driving member 23 can drive the abutting plate 2211 to extend out of the slapping opening 211, and the reset member 223 can drive the abutting plate 2211 to reset. The reset member 223 is a reset spring, which is sleeved on the push rod 222, and one end is fixed to the rod body of the push rod 222, and the other end is fixed to the inner circumferential wall of the installation tube 21. The roller 4 elastically abuts against the driving member 23 under the action of the reset spring;

[0062] likeFigure 3 As shown in the figure, a limiting component 5 for preventing the detachment and limiting the abutting plate 2211 is further provided inside the installation cylinder 21. A limiting groove 6 for preventing detachment and limiting is formed in the inner peripheral wall of the installation cylinder 21. The limiting component 5 includes a limiting member 51 provided on the peripheral wall of the abutting plate 2211 and a buffer member 52 for buffering the movement of the abutting plate 2211.

[0063] As Figure 3 shown, the limiting member 51 is a limiting rod, and the limiting rod is slidably clamped in the corresponding limiting groove 6. The buffer member 52 is a buffer spring, and the buffer spring is located in the limiting groove 6 and abuts against the inner wall of the limiting groove 6 and the limiting member 51 respectively. When the driving member 23 drives the abutting plate 2211 to move, the buffer spring can buffer the limiting rod, so that the abutting plate 2211 can be buffered during the process of patting the side wall of the hole, reducing the possibility of damage to the abutting plate 2211 during the patting process.

[0064] As Figure 3 shown, the driving member 23 includes a plurality of arc-shaped protrusions provided on the outer peripheral wall of the jet grouting drill rod. The arc-shaped protrusions are arranged at intervals along the circumferential direction of the jet grouting drill rod. During the process of the jet grouting drill rod driving the arc-shaped protrusions to rotate, the roller 4 can be driven to move. The roller 4 drives the push rod 222 to move, thereby driving the push plate 2212 to move. The push plate 2212 pushes the abutting plate 2211 to move, so as to abut against the inner peripheral wall of the hole.

[0065] During this process, the inner peripheral wall of the hole will exert a reverse acting force on the abutting plate 2211. The abutting plate 2211 and the push plate 2212 mutually press the measuring mechanism 7, so that the measuring mechanism 7 detects the magnitude of the acting force.

[0066] Specifically, as Figure 3 shown, the measuring mechanism 7 includes a plurality of pressure sensors correspondingly installed between the abutting plate 2211 and the push plate 2212. The plurality of pressure sensors are all electrically connected to an external control mechanism. When the pressure sensors transmit the detected pressure signals to the external control mechanism, the control mechanism will analyze the data signals, judge the structural strength of the soil mass according to the magnitude of the acting force, and thus judge the geological layer where the jet grouting drill rod is located.

[0067] Adjust the high-pressure water pump to different gears for geological layers with different soil mass structural strengths, so that the high-pressure nozzle can spray water at different pressures, so as to achieve that in different geological layers, the high-pressure nozzle can cut out holes of the same size, so that the size of the finally cast jet grouting pile is close to the design size, thus ensuring the quality of the reinforcement.

[0068] The implementation principle of the high-pressure jet grouting pile reinforcement process applicable to the red-bed soft rock landfilling site in the embodiment of the present application is as follows: The reinforcement mechanism 2 can pat and reinforce the inner wall of the hole, thereby reducing the possibility of the hole collapsing under the cutting of high-pressure water;

[0069] At the same time, the measuring mechanism 7 measures the reaction force feedback from the inner wall of the hole during patting, thereby judging the geological layer where the jet grouting drill pipe is located. According to different geological layers, the high-pressure water pump is adjusted to different gears, so that the high-pressure water can change the cutting ability of the high-pressure water according to the strength of the soil structure of different geological layers, so that the size of the cut hole is as close as possible to the design size. The two together reduce the construction error of the jet grouting pile after construction, thereby ensuring the structural strength of the jet grouting pile and improving the reinforcement quality of the jet grouting pile.

[0070] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A high-pressure rotary jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites, characterized in that: It includes the following steps: S1: Level and compact the red-bed soft rock landfill site, install the drill rig (1) at the predetermined construction location, and adjust the inclination of the drill pipe to be perpendicular to the ground; S2: Drive the rotary jet grouting drill pipe to descend through the lifting mechanism (11), drive the rotary jet grouting drill pipe to rotate through the driving mechanism (12), turn on the high-pressure water pump, and make the rotary jet grouting rod spray high-pressure water while rotating downward to cut the soil mass, thereby forming a hole for grouting; A reinforcement mechanism (2) for reinforcing the inner wall of the hole is provided on the rotary jet grouting drill pipe. During the rotation of the rotary jet grouting drill pipe, the reinforcement mechanism (2) can drive the inner wall of the hole to be patted and reinforced; A measuring mechanism (7) for measuring the reaction force generated by patting the inner wall of the hole is also provided on the reinforcement mechanism (2). The measuring mechanism (7) is connected to the external control mechanism, and different geological layers where the end of the rotary jet grouting drill pipe is located are judged through different data, so as to adjust the high-pressure water pump to different gears; S3: The rotary jet grouting drill pipe drills to the designed elevation, turn on the mud pump, and at the same time lift the rotary jet grouting drill pipe to form a rotary jet grouting pile in the hole, so as to realize the reinforcement of the formation; The reinforcement mechanism (2) in step S2 includes an installation cylinder (21) fixed to the lifting end of the lifting mechanism (11), a plurality of patting components (22) arranged on the peripheral wall of the installation cylinder (21), and a driving member (23) arranged on the outer peripheral wall of the rotary jet grouting drill pipe and used to drive the patting components (22) to repeatedly pat the inner wall of the hole; A plurality of patting ports (211) are opened on the outer peripheral wall of the installation cylinder (21), and a plurality of groups of the patting components (22) are arranged corresponding to each of the patting ports (211); the patting components (22) include a patting plate (221) slidably clamped in the patting port (211), a push rod (222) fixed to one side of the patting plate (221) and extending into the inner cavity of the installation cylinder (21), and a reset member (223) for driving the patting plate (221) to reset. The driving member (23) can drive the push rod (222) to move outward from the patting port (211); The driving member (23) includes a plurality of arc-shaped convex blocks arranged on the outer peripheral wall of the rotary jet grouting drill pipe. Each of the arc-shaped convex blocks is arranged at intervals along the circumferential direction of the rotary jet grouting drill pipe, and the arc-shaped convex blocks can drive the end of the push rod (222) to move during the rotation process.

2. A high-pressure rotary jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites according to claim 1, characterized in that: A roller (4) is arranged at the end of the push rod (222), and the roller (4) is elastically abutted against the outer peripheral wall of the arc-shaped convex block under the action of the reset member (223).

3. A high-pressure rotary jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites according to claim 2, characterized in that: The roller (4) is rotatably installed at the end of the push rod (222).

4. A high-pressure rotary jet grouting pile reinforcement process applicable to red-bed soft rock landfill sites according to claim 1, characterized in that: The measuring mechanism (7) comprises a plurality of pressure sensors arranged corresponding to each of the flapping plates (221), the flapping plates (221) comprising abutting plates (2211) and a pushing plate (2212) which are slidably plugged into each other, and the pressure sensors are arranged between the abutting plates (2211) and the pushing plates (2212); One side of the pushing plate (2212) is fixedly connected to the push rod (222), and an elastic member (3) for connecting the abutting plate (2211) and the pushing plate (2212) is provided between the two.

5. A high-pressure jet grouting pile reinforcement process suitable for red-bed soft rock landfill sites according to claim 4, Features: The side of the abutment plate (2211) facing away from the push plate (2212) is arranged in a curved surface and is flush with the outer peripheral wall of the installation cylinder (21).

6. A high-pressure jet grouting pile reinforcement process suitable for red-bed soft rock landfill sites according to claim 4, Features: A limiting assembly (5) for preventing the abutment plate (2211) from falling off is also provided in the installation cylinder (21).

7. A high-pressure jet grouting pile reinforcement process suitable for red-bed soft rock landfill sites according to claim 6, Features: A limiting groove (6) for preventing disengagement and limiting is provided in the inner peripheral wall of the mounting tube (21); the limiting assembly (5) comprises a limiting member (51) arranged on the peripheral wall of the abutment plate (2211) and a buffer member (52) for buffering the movement of the abutment plate (2211); the limiting member (51) is slidably engaged in the limiting groove (6); the buffer member (52) is located in the limiting groove (6) and is respectively in contact with the inner wall of the limiting groove (6) and the limiting member (51).

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