A pipeline gallery trench backfill construction device and method based on premixed fluidized solidified soil

Abstract

The present invention provides a pipeline corridor trench backfill construction device and method based on premixed fluidized solidified soil, which belongs to the field of foundation trench backfill construction, and is used to solve the problem that the backfill devices and methods in the prior art cannot meet the trench backfilling requirements of small pipeline corridors and large trenches with pipelines or structures in the middle and narrow fertilizer troughs on both sides. It includes a mobile frame, and two groups of backfill construction units arranged on both sides of the mobile frame, the backfill construction units include a solidified soil backfill component, a leveling and light tamping component, and a film covering component, the solidified soil backfill component includes a fluidized solidified soil conveying pipeline; the leveling and light tamping component includes a trowel plate, and first and second driving mechanisms for driving the trowel plate to reciprocate up and down; the film covering component includes a film roll. The present application realizes the backfilling of the trenches on both sides of the pipeline corridor by arranging two groups of backfill construction units on both sides of the mobile frame, and at the same time, by adjusting the distance between the two groups of backfill construction units, it can adapt to the backfilling of trenches on both sides of pipeline corridors with different diameters.

Description

Technical Field

[0001] The invention belongs to the field of foundation trench backfill construction, and in particular relates to a pipeline gallery trench backfill construction device and method based on premixed fluidized solidified soil. Background Art

[0002] During the foundation trench backfill construction process, due to the limitations of terrain conditions and foundation trench conditions, traditional backfill materials often have technical problems such as loose backfill and difficulty in backfilling. In recent years, with the development of technology, more and more new materials have been widely used in the field of foundation trench backfill. Premixed fluidized solidified soil has been widely used in the field of foundation trench backfill due to its excellent fluidity and strength.

[0003] The invention patent with the announcement number CN113585290A discloses a "construction method for backfilling narrow fertilizer troughs in deep foundation pits based on premixed fluidized solidified soil". This method solves the technical problem in the prior art that the surrounding area of ​​the fertilizer trough is too narrow to establish a mixing station by optimizing the mixing station and using fluidized solidified soil to backfill the fertilizer trough; the invention patent with the announcement number CN111851527A discloses a "construction method for backfilling foundation trenches based on premixed fluidized solidified soil". This method first cleans to the bottom elevation of the foundation, checks the quality of the backfilled fluidized solidified soil, and backfills the fluidized solidified soil. After the filling is completed, the surface should be leveled by pulling a line, and the mass density of the dry soil should be measured. When the mass density reaches the specified requirements, a layer of soil is laid on top of the fluidized solidified soil. Although the above method realizes the backfilling of the foundation trench, it cannot meet the backfilling of trenches such as small pipe corridors and large trenches with pipelines or structures in the middle and narrow fertilizer troughs to be backfilled on both sides. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the object of the present invention is to provide a pipeline corridor trench backfill construction device and method based on premixed fluidized solidified soil, which is used to solve the problem that the backfilling devices and methods in the prior art cannot meet the backfilling problems of small pipeline corridors and large trenches such as those with pipelines or structures in the middle and narrow trenches on both sides.

[0005] To achieve the above-mentioned object and other related objects, the present invention provides a pipeline corridor trench backfill construction device based on premixed fluidized solidified soil, comprising a mobile frame, and two groups of backfill construction units arranged on both sides of the mobile frame for backfilling the trenches on both sides of the pipeline corridor, respectively, wherein the backfill construction units each comprise a first mounting frame, and:

[0006] Solidified soil backfill components,

[0007] The solidified soil backfill assembly includes a fluidized solidified soil conveying pipeline. During backfill construction, the feed end of the fluidized solidified soil conveying pipeline is connected to the discharge end of the pumping equipment, and the discharge end of the fluidized solidified soil conveying pipeline is located above the trench to be backfilled;

[0008] Smooth and lightly tamp the components.

[0009] The trowel and light tamping assembly comprises a trowel plate, and a first driving mechanism and a second driving mechanism for driving the trowel plate to reciprocate up and down to tamp and flatten the fluidized solidified soil. The first driving mechanism and the second driving mechanism are both mounted on the first mounting frame. The trowel plate can be selectively connected to the first driving mechanism or the second driving mechanism.

[0010] Film covering components,

[0011] The coating assembly includes a film roll arranged on the first mounting frame, and a third driving mechanism for cutting off the free end of the film roll and pushing the squeegee plate to separate from the first driving mechanism and the second driving mechanism, wherein the third driving mechanism is mounted on the first mounting frame.

[0012] As an optional solution, a second mounting frame that slides in the vertical direction is provided at the bottom end of the mobile frame, and a first electric telescopic rod for driving the second mounting frame to slide in the vertical direction is installed on the mobile frame;

[0013] Two groups of backfill construction units are slidably arranged on both sides of the second mounting frame, and the two groups of backfill construction units slide along the normal direction of the movement direction of the mobile frame. Second electric telescopic rods for driving the two groups of backfill construction units to slide are installed on the side walls of the second mounting frame.

[0014] As an optional solution, the first driving mechanism includes a first mounting plate, a third electric telescopic rod, a first T-shaped slider, a first limit plate and a fourth electric telescopic rod;

[0015] The first mounting plate is mounted on a first mounting frame between the film roll and the conveying pipeline, a third electric telescopic rod that is telescopic in the vertical direction is mounted on the first mounting plate, and a top end of the first T-shaped slider is fixedly connected to a telescopic end of the third electric telescopic rod;

[0016] The trowel plate is provided with a T-shaped slide groove, the T-shaped slide groove is arranged along the movement direction of the mobile frame, the bottom end of the first T-shaped slider is slidably matched with the T-shaped slide groove, the bottom end of the first T-shaped slider is provided with a first slide groove, the first slide groove is arranged along the normal direction of the movement direction of the mobile frame, the two first limit plates are both slidably arranged in the first slide groove, and two fourth electric telescopic rods for respectively driving the two first limit plates to slide are installed on the top wall of the first slide groove between the two first limit plates;

[0017] A plurality of limiting grooves are also provided on the two side walls of the T-shaped slide groove, and the limiting grooves are used to cooperate with the two first limiting plates to limit the trowel plate.

[0018] As an optional solution, the second driving mechanism includes a first guide rod, a screw rod, a first motor, a second mounting plate, a fifth electric telescopic rod, a second T-shaped slider, a second limit plate and a sixth electric telescopic rod;

[0019] The first guide rod and the screw rod are respectively mounted on the side walls of both sides of the first mounting frame, the axes of the first guide rod and the screw rod are parallel to the movement direction of the mobile frame, the first guide rod and the screw rod are located between the solidified soil backfill assembly and the first driving mechanism, and one end of the screw rod is connected to the power output shaft of the first motor;

[0020] One end of the second mounting plate is threadedly connected to the screw rod, and the other end of the second mounting plate is slidably connected to the first guide rod. A fifth electric telescopic rod that is telescopic in the vertical direction is mounted on the second mounting plate, and the top end of the second T-shaped slider is fixedly connected to the telescopic end of the fifth electric telescopic rod, and the bottom end of the second T-shaped slider is slidably matched with the T-shaped slide groove;

[0021] A second slide groove is provided at the bottom end of the second T-shaped slider, and the second slide groove is arranged along the normal direction of the moving direction of the mobile frame. Two second limit plates are slidably arranged in the second slide groove, and two sixth electric telescopic rods for respectively driving the two second limit plates to slide are installed on the top wall of the second slide groove between the two second limit plates, and the two second limit plates cooperate with the limit grooves to limit the trowel plate.

[0022] As an optional solution, the first driving mechanism further includes an obstacle detection module for detecting obstacles at the front end of the screed plate, and the obstacle detection module includes a displacement sensor, a T-shaped strip, a detection plate and a first spring;

[0023] The displacement sensor, the T-shaped strip and the first spring are all mounted on the side wall of the first T-shaped slider close to the second driving mechanism. A third slide groove is provided on the top of the T-shaped strip, and the third slide groove is arranged parallel to the moving direction of the moving frame. The detection plate slides along the third slide groove, and the top end of the displacement sensor and the other end of the first spring are connected to the side wall of the detection plate.

[0024] When the detection plate detects an obstacle, the third driving mechanism pushes the screed plate to be separated from the first driving mechanism and connected to the second driving mechanism.

[0025] As an optional solution, the third driving mechanism includes a third mounting plate, a seventh electric telescopic rod, a fourth mounting plate, an eighth electric telescopic rod, a first push plate, a second push plate, a second guide rod and a second spring;

[0026] The third mounting plate is mounted on the rear side of the film roll, a seventh electric telescopic rod that is telescopically extended in the vertical direction is mounted on the third mounting plate, the fourth mounting plate is mounted on the telescopic end of the seventh electric telescopic rod, and an eighth electric telescopic rod that is telescopically extended in the moving direction of the moving frame is mounted on the fourth mounting plate;

[0027] A first push plate is installed at the telescopic end of the eighth electric telescopic rod, the second push plate is located in front of the first push plate, a second guide rod is installed on the side wall of the second push plate close to the first push plate, the second guide rod is slidably connected to the first push plate, a second spring is sleeved on the outer wall of the second guide rod, and both ends of the second spring are respectively connected to the first push plate and the second push plate;

[0028] A cutting module for cutting off the free end of the film roll is also arranged between the first push plate and the second push plate.

[0029] As an optional solution, the cutting module includes a cutting knife and a cutting groove;

[0030] When the eighth electric telescopic rod is in an initial state, the free end of the film roll is located between the first push plate and the second push plate;

[0031] A cutting knife is also installed on the side wall of the second push plate close to the first push plate, and a cutting groove cooperating with the cutting knife to cut the free end of the film roll is opened on the side wall of the first push plate close to the second push plate.

[0032] A pipeline gallery trench backfilling construction method based on premixed fluidized solidified soil, using the above-mentioned pipeline gallery trench backfilling construction device based on premixed fluidized solidified soil, and the specific steps are:

[0033] S1: Start the mobile frame so that the wheels on both sides of the mobile frame are located on both sides of the trench to be backfilled;

[0034] S2: Start the second electric telescopic rod, and adjust the extension amount of the second electric telescopic rod so that the backfill construction units on both sides are respectively located above the trenches on both sides of the pipe gallery;

[0035] S3: Start the first electric telescopic rod to push out, so that the first mounting frame is flush with the upper surface of the trench to be backfilled;

[0036] S4: Connect the discharge end of the pumping equipment to the feed end of the fluidized solidified soil conveying pipeline, and start the pumping equipment to pump the fluidized solidified soil into the trenches on both sides of the pipe gallery;

[0037] S5: Start the third electric telescopic rod to extend, so that the trowel plate descends to a predetermined height, the mobile frame moves forward, and the trowel plate trowels the fluidized solidified soil;

[0038] S6: Start the third electric telescopic rod to move up and down, and move the frame forward, so that the trowel plate can move up and down to lightly tamp and flatten the fluidized solidified soil, and at the same time drive the central axis of the film roll to rotate, so that the film covers the fluidized solidified soil that has been lightly tamped and flattened.

[0039] As an optional solution, in step S5, when the detection plate collides with an obstacle during the forward movement of the wiping plate, the moving frame stops, and the third driving mechanism pushes the wiping plate to disengage from the first driving mechanism and connect to the second driving mechanism. The specific steps are as follows:

[0040] S5.1: When the detection plate collides with the obstacle, the first spring is compressed, the displacement sensor detects the displacement, and the moving frame stops;

[0041] S5.2: Start the fifth electric telescopic rod to push out, so that the second T-shaped slider is flush with the T-shaped slide groove, and start the seventh electric telescopic rod to push out, so that the second push plate is located on the side of the trowel plate;

[0042] S5.3: Start the fourth electric telescopic rod and the sixth electric telescopic rod to retract, so that the first limit plate and the second limit plate are retracted, and the limit groove is separated from the first limit plate;

[0043] S5.4: The eighth electric telescopic rod is started to be pushed out, the second push plate pushes the trowel plate to move forward, the first T-shaped slider is disengaged from the T-shaped slide groove, and the second T-shaped slider is connected to the T-shaped slide groove;

[0044] S5.5: Start the third electric telescopic rod to rise to the initial position, and move the frame forward to make the device avoid obstacles.

[0045] As an optional solution, in step S6, when the detection plate collides with an obstacle during the forward and up-and-down reciprocating motion of the wiping plate, the moving frame stops, and the third driving mechanism pushes the wiping plate to disengage from the first driving mechanism and connect with the second driving mechanism to cut off the free end of the film roll. The specific steps are as follows:

[0046] S6.1: When the detection plate collides with the obstacle, the first spring is compressed, the displacement sensor detects the displacement, and the moving frame stops;

[0047] S6.2: Start the fifth electric telescopic rod to push out, so that the second T-shaped slider is flush with the T-shaped slide groove, start the sixth electric telescopic rod to retract, so that the second limit plate is retracted, and start the seventh electric telescopic rod to push out, so that the second push plate is located on the side of the trowel plate;

[0048] S6.3: Start the fourth electric telescopic rod to retract, the first limit plate is disengaged from the limit groove at the current position, start the eighth electric telescopic rod to push out, the second push plate pushes the trowel plate to move forward, and at the same time drives the film roll to rotate to cover the fluidized solidified soil after light tamping and flattening;

[0049] S6.4: When the first limit plate is aligned with the next limit groove of the trowel plate, the eighth electric telescopic rod stops, the fourth electric telescopic rod is started to extend, the first limit plate is engaged with the limit groove at the current position, and the third electric telescopic rod is started to reciprocate and lift, so as to lightly tamp and flatten the fluidized solidified soil under the obstacle;

[0050] S6.5: The fourth electric telescopic rod is started to retract, the first limit plate is disengaged from the limit groove at the current position, the eighth electric telescopic rod is started to continue to be pushed out, the first T-shaped slider is disengaged from the T-shaped slide groove, the second T-shaped slider is connected to the T-shaped slide groove, when the limit groove is aligned with the second limit plate, the sixth electric telescopic rod is pushed out, and the second limit plate is engaged with the limit groove;

[0051] S6.6: The eighth electric telescopic rod continues to be pushed out, and the cutting knife cooperates with the cutting groove to cut off the free end of the film roll;

[0052] S6.7: Start the third electric telescopic rod to rise to the initial position, and move the frame forward to enable the device to avoid obstacles.

[0053] As described above, the pipeline gallery trench backfill construction device and method based on premixed fluidized solidified soil of the present invention has at least the following beneficial effects:

[0054] 1. This application realizes the backfilling of the trenches on both sides of the corridor by arranging two groups of backfilling construction units on both sides of the mobile frame, and at the same time, by adjusting the distance between the two groups of backfilling construction units, it can adapt to the backfilling of trenches on both sides of corridors with different diameters.

[0055] 2. The present application sets a first driving mechanism and a trowel plate. During the process of leveling the fluidized solidified soil, the first driving mechanism drives the trowel plate to rise and fall to a predetermined height. During the movement of the mobile frame, the trowel plate levels the fluidized solidified soil. During the process of light tamping and flattening the fluidized solidified soil, the first driving mechanism drives the trowel plate to reciprocate up and down to achieve light tamping and flattening of the fluidized solidified soil. That is, the first driving mechanism and the trowel plate both achieve leveling of the fluidized solidified soil and light tamping and flattening. The device has a compact structure and low cost.

[0056] 3. The present application sets a first driving mechanism, a second driving mechanism, and a third driving mechanism. When there is an obstacle such as a horizontal pipe in front of the trowel plate, the third driving mechanism drives the trowel plate to disengage from the first driving mechanism and connect with the second driving mechanism, so that the device can quickly pass through the obstacle. At the same time, the trowel plate can simultaneously smooth and lightly compact the fluidized solidified soil under the obstacle during the switching process, thereby solving the technical problem that the fluidized solidified soil under the obstacle cannot be smoothed and lightly compacted in the prior art.

[0057] 4. The present application sets a first push plate and a second push plate. When encountering an obstacle, the first push plate pushes the trowel plate forward, and the second push plate pushes the film forward. The film is cut off during the forward movement, thereby achieving the laying of the film under the obstacle. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 Shown is a schematic structural diagram of a pipeline gallery trench backfilling construction device of the present invention;

[0059] Figure 2 It is a schematic diagram showing the internal structure of the mobile frame 1 of the present invention;

[0060] Figure 3 Shown is a structural schematic diagram of a backfill construction unit of the present invention;

[0061] Figure 4 Shown is a schematic structural diagram of a first driving mechanism of the present invention;

[0062] Figure 5 Shown is a schematic structural diagram of a screed board according to the present invention;

[0063] Figure 6 It is a schematic structural diagram of a first T-shaped slider of the present invention;

[0064] Figure 7 It is a schematic structural diagram of a second T-shaped slider of the present invention;

[0065] Figure 8 Shown is a schematic structural diagram of a cutting module of the present invention;

[0066] Fig. 9 Shown is a schematic structural diagram of the film covering assembly of the present invention;

[0067] Fig.10 Shown is a schematic structural diagram of the pipeline gallery trench to be backfilled according to the present invention.

[0068] In the figure: 1-mobile frame; 101-second mounting frame; 102-first electric telescopic rod; 103-second electric telescopic rod;

[0069] 2- first mounting frame;

[0070] 3-solidified soil backfill assembly; 301-fluidized solidified soil conveying pipeline; 302-feeding pipe;

[0071] 4-smoothing and light tamping assembly; 401-smoothing plate; 402-first mounting plate; 403-third electric telescopic rod; 404-first T-shaped slider; 405-first limit plate; 406-fourth electric telescopic rod; 407-first guide rod; 408-screw; 409-first motor; 410-second mounting plate; 411-fifth electric telescopic rod; 412-second T-shaped slider; 413-second limit plate; 414-sixth electric telescopic rod; 415-displacement sensor; 416-T-shaped long strip; 417-detection plate; 418-first spring; 4011-T-shaped slide; 4041-first slide; 4012-limiting groove; 4161-third slide; 4121-second slide;

[0072] 5-film coating assembly; 501-film roll; 502-third mounting plate; 503-seventh electric telescopic rod; 504-fourth mounting plate; 505-eighth electric telescopic rod; 506-first push plate; 507-second push plate; 508-second guide rod; 509-second spring; 510-cutting knife; 511-cutting groove;

[0073] 601- horizontal pipeline; 602- pipeline gallery. DETAILED DESCRIPTION

[0074] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0075] See also Figures 1 to 10 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0076] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0077] See also Figure 1 , 2 , 3, 4, 5, 10, the present invention provides a pipeline corridor trench backfill construction device based on premixed fluidized solidified soil, comprising a mobile frame 1, and two groups of backfill construction units arranged on both sides of the mobile frame 1 for backfilling the trenches on both sides of the pipeline corridor respectively, the backfill construction units each comprising a first mounting frame 2, and:

[0078] Solidified soil backfill component 3,

[0079] The solidified soil backfill assembly 3 includes a fluidized solidified soil conveying pipeline 301. During backfill construction, the feed end of the fluidized solidified soil conveying pipeline 301 is connected to the discharge end of the pumping equipment, and the discharge end of the fluidized solidified soil conveying pipeline 301 is located above the trench to be backfilled;

[0080] Smooth and lightly tamp components 4,

[0081] The trowel and light tamping assembly 4 includes a trowel plate 401, and a first driving mechanism and a second driving mechanism for driving the trowel plate 401 to reciprocate up and down to tamp and flatten the fluidized solidified soil. The first driving mechanism and the second driving mechanism are both installed on the first mounting frame 2. The trowel plate 401 can be selectively connected to the first driving mechanism or the second driving mechanism.

[0082] Laminating component 5,

[0083] The coating assembly 5 includes a film roll 501 arranged on the first mounting frame 2, and a third driving mechanism for cutting off the free end of the film roll 501 and pushing the squeegee 401 to disconnect from the first driving mechanism and the second driving mechanism, wherein the third driving mechanism is installed on the first mounting frame 2.

[0084] In this embodiment, the fluidized solidified soil conveying pipelines 301 on both sides are connected to the feed pipe 302 located at the top of the mobile frame 1 through a flexible pipe. When the trench backfilling construction of the pipeline corridor 602 is carried out, the mobile frame 1 is started so that the wheels on both sides of the mobile frame 1 are respectively located on both sides of the trench to be backfilled, and the fluidized solidified soil conveying pipelines 301 convey the fluidized solidified soil to the trenches on both sides; the first driving mechanism drives the trowel plate 401 down to a predetermined height to smooth the fluidized solidified soil; and then the first driving mechanism drives the trowel plate 401 to reciprocate up and down to lightly tamp and flatten the fluidized solidified soil. During the light tamping and flattening process, the film roll releases the film so that it covers the fluidized solidified soil after light tamping and flattening.

[0085] In this embodiment, during the pre-buried construction of road pipelines, when passing through intersections and other places, transverse pipes 601 (including street lamp line pipes, green belt sprinkler water pipes, etc.) often appear above the pipes. The existence of these pipes brings great changes to leveling, light tamping and coating. The present application sets a first driving mechanism, a second driving mechanism, and a third driving mechanism. When there are obstacles such as transverse pipes 601 in front of the trowel plate 401, the third driving mechanism drives the trowel plate 401 to disengage from the first driving mechanism and connect with the second driving mechanism, so that the device can quickly pass through the obstacle. At the same time, the trowel plate 401 realizes the leveling and light tamping of the fluidized solidified soil under the obstacle during the switching process, which solves the technical problem that the fluidized solidified soil under the obstacle cannot be leveled and lightly tamped in the prior art.

[0086] See also Figure 1 , 2 3. A second mounting frame 101 that slides in a vertical direction is disposed at the bottom end of the mobile frame 1, and a first electric telescopic rod 102 that is used to drive the second mounting frame 101 to slide in a vertical direction is installed on the mobile frame 1;

[0087] Two groups of backfill construction units are slidably arranged on both sides of the second mounting frame 101, and the two groups of backfill construction units slide along the normal direction of the movement direction of the mobile frame 1. Second electric telescopic rods 103 for driving the two groups of backfill construction units to slide are installed on the side walls of the second mounting frame 101.

[0088] In this embodiment, by setting the first electric telescopic rod 102, the two groups of backfilling construction units can be lowered to a specified height for backfilling operations, and by setting the second electric telescopic rod 103, the distance between the two groups of backfilling construction units can be quickly adjusted, thereby realizing the backfilling of the trenches on both sides of the corridor 602, and at the same time being able to adapt to the backfilling of trenches on both sides of the corridor 602 with different diameters.

[0089] See also Figure 1 , 2 , 3, 4, 5, 6, the first driving mechanism includes a first mounting plate 402, a third electric telescopic rod 403, a first T-shaped slider 404, a first limit plate 405 and a fourth electric telescopic rod 406;

[0090] The first mounting plate 402 is mounted on the first mounting frame 2 between the film roll 501 and the conveying pipeline 301, a third electric telescopic rod 403 that is telescopic in the vertical direction is mounted on the first mounting plate 402, and the top end of the first T-shaped slider 404 is fixedly connected to the telescopic end of the third electric telescopic rod 403;

[0091] The trowel plate 401 is provided with a T-shaped slot 4011, and the T-shaped slot 4011 is arranged along the moving direction of the mobile frame 1. The bottom end of the first T-shaped slider 404 is slidably matched with the T-shaped slot 4011. The bottom end of the first T-shaped slider 404 is provided with a first slot 4041, and the first slot 4041 is arranged along the normal direction of the moving direction of the mobile frame 1. Two first limit plates 405 are both slidably arranged in the first slot 4041. Two fourth electric telescopic rods 406 for respectively driving the two first limit plates 405 to slide are installed on the top wall of the first slot 4041 between the two first limit plates 405.

[0092] A plurality of limiting grooves 4012 are further provided on the two side walls of the T-shaped slide groove 4011 . The limiting grooves 4012 are used to cooperate with the two first limiting plates 405 to limit the trowel plate 401 .

[0093] In this embodiment, the number of the limiting grooves 4012 is 3. At the initial moment, the two first limiting plates 405 are clamped in the middle limiting groove 4012. When leveling, the third electric telescopic rod 403 is started to extend, so that the trowel plate 401 is lowered to a predetermined height, the mobile frame 1 moves forward, and the trowel plate 401 smoothes the solidified soil; when lightly tamping and flattening, the third electric telescopic rod 403 is started to reciprocate up and down, the mobile frame 1 moves forward, and the trowel plate 401 is reciprocated up and down to lightly tamp and flatten the solidified soil.

[0094] See also Figure 1 , 2 , 3, 4, 5, 7, the second driving mechanism includes a first guide rod 407, a screw rod 408, a first motor 409, a second mounting plate 410, a fifth electric telescopic rod 411, a second T-shaped slider 412, a second limit plate 413 and a sixth electric telescopic rod 414;

[0095] The first guide rod 407 and the screw rod 408 are respectively mounted on the side walls of the first mounting frame 2, the axes of the first guide rod 407 and the screw rod 408 are parallel to the movement direction of the mobile frame 1, the first guide rod 407 and the screw rod 408 are located between the solidified soil backfill assembly 3 and the first driving mechanism, and one end of the screw rod 408 is connected to the power output shaft of the first motor 409;

[0096] The screw rod 408 is threadedly connected to one end of the second mounting plate 410, and the first guide rod 407 is slidably connected to the other end of the second mounting plate 410. A fifth electric telescopic rod 411 that telescopes in the vertical direction is mounted on the second mounting plate 410. The top end of the second T-shaped slider 412 is fixedly connected to the telescopic end of the fifth electric telescopic rod 411, and the bottom end of the second T-shaped slider 412 is slidably matched with the T-shaped slide groove 4011.

[0097] A second slide groove 4121 is provided at the bottom end of the second T-shaped slider 412, and the second slide groove 4121 is arranged along the normal direction of the moving direction of the movable frame 1. Two second limit plates 413 are both slidably arranged in the second slide groove 4121. Two sixth electric telescopic rods 414 for respectively driving the two second limit plates 413 to slide are installed on the top wall of the second slide groove 4121 between the two second limit plates 413. The two second limit plates 413 cooperate with the limit groove 4012 to limit the trowel plate 401.

[0098] In this embodiment, the spacing between the first drive mechanism and the second drive mechanism is adjusted by screw 408 to meet the needs of lateral obstacles of different widths. During the leveling process, the device avoids obstacles and level the fluidized solidified soil under the obstacles through the steps S5.1 to S5.5 in a pipeline corridor trench backfill construction method based on premixed fluidized solidified soil. During the light tamping and leveling process, the device avoids obstacles and lightly tamps and level the fluidized solidified soil under the obstacles through the steps S6.1 to S6.7 in a pipeline corridor trench backfill construction method based on premixed fluidized solidified soil.

[0099] See also Figure 1 , 2 , 3, 4, the first driving mechanism also includes an obstacle detection module for detecting obstacles at the front end of the screed plate 401, and the obstacle detection module includes a displacement sensor 415, a T-shaped long strip 416, a detection plate 417 and a first spring 418;

[0100] The displacement sensor 415, the T-shaped long strip 416, and the first spring 418 are all installed on the side wall of the first T-shaped slider 404 close to the second driving mechanism. The top of the T-shaped long strip 416 is provided with a third slide groove 4161, and the third slide groove 4161 is arranged parallel to the moving direction of the moving frame 1. The detection plate 417 slides along the third slide groove 4161, and the top end of the displacement sensor 415 and the other end of the first spring 418 are connected to the side wall of the detection plate 417;

[0101] When the detection plate 402 detects an obstacle, the third driving mechanism pushes the trowel plate 401 to be separated from the first driving mechanism and connected to the second driving mechanism.

[0102] In this embodiment, when the first spring 418 is in a free state, the front end surface of the detection plate 402 is located at the front end of the trowel plate 401, that is, during the movement of the mobile frame 1, the detection plate 402 first collides with obstacles such as the transverse pipe 601. When the detection plate 402 collides with obstacles such as the transverse pipe 601, the mobile frame 1 continues to move forward, the first spring 418 is compressed, the displacement sensor 415 detects the displacement, and the mobile frame 1 stops moving.

[0103] See also Figure 1 , 2 , 3, 4, 5, 8, 9, the third driving mechanism includes a third mounting plate 502, a seventh electric telescopic rod 503, a fourth mounting plate 504, an eighth electric telescopic rod 505, a first push plate 506, a second push plate 507, a second guide rod 508 and a second spring 509;

[0104] The third mounting plate 502 is mounted on the rear side of the film roll 501, a seventh electric telescopic rod 503 that is telescopic in the vertical direction is mounted on the third mounting plate 502, the fourth mounting plate 504 is mounted on the telescopic end of the seventh electric telescopic rod 503, and an eighth electric telescopic rod 505 that is telescopic in the moving direction of the moving frame 1 is mounted on the fourth mounting plate 504;

[0105] The telescopic end of the eighth electric telescopic rod 505 is installed with a first push plate 506, the second push plate 507 is located in front of the first push plate 506, and a second guide rod 508 is installed on the side wall of the second push plate 507 close to the first push plate 506, the second guide rod 508 is slidably connected to the first push plate 506, and a second spring 509 is sleeved on the outer wall of the second guide rod 508, and the two ends of the second spring 509 are respectively connected to the first push plate 506 and the second push plate 507;

[0106] A cutting module for cutting off the free end of the film roll 501 is also provided between the first push plate 506 and the second push plate 507 .

[0107] See also Figure 8 , 9 , the cutting module includes a cutting knife 510 and a cutting groove 511;

[0108] When the eighth electric telescopic rod 505 is in the initial state, the free end of the film roll 501 is located between the first push plate 506 and the second push plate 507;

[0109] A cutting knife 510 is also installed on the side wall of the second push plate 507 close to the first push plate 506 , and a cutting groove 511 is opened on the side wall of the first push plate 506 close to the second push plate 507 for cooperating with the cutting knife 510 to cut the free end of the film roll 501 .

[0110] In this embodiment, during the leveling process, when encountering an obstacle, the first push plate 506 pushes the trowel plate 401 to move forward, so that the first T-shaped slider 404 is disengaged from the T-shaped slot 4011, and the second T-shaped slider 412 is connected to the T-shaped slot 4011, so that the trowel plate can pass through the obstacle smoothly. During the light tamping and leveling process, when encountering an obstacle, the first push plate 506 pushes the trowel plate 401 to move forward, and the second push plate 507 pushes the film to move forward. When the first T-shaped slider 404 is disengaged from the T-shaped slot 4011 and the second T-shaped slider 412 is connected to the T-shaped slot 4011, the eighth electric telescopic rod 505 is started to continue to extend, the second spring 509 is compressed, and the cutting knife 510 contacts the film and cooperates with the cutting groove 511 to cut off the free end of the film roll 501.

[0111] A pipeline gallery trench backfilling construction method based on premixed fluidized solidified soil, using the above-mentioned pipeline gallery trench backfilling construction device based on premixed fluidized solidified soil, and the specific steps are:

[0112] S1: Start the mobile frame 1 so that the wheels on both sides of the mobile frame 1 are respectively located on both sides of the trench to be backfilled;

[0113] S2: Start the second electric telescopic rod 103, and adjust the extension amount of the second electric telescopic rod 103 so that the backfill construction units on both sides are respectively located above the grooves on both sides of the pipe gallery 602;

[0114] S3: Start the first electric telescopic rod 102 to push out, so that the first mounting frame 2 is flush with the upper surface of the trench to be backfilled;

[0115] S4: Connect the discharge end of the pumping equipment to the feed end of the fluidized solidified soil conveying pipeline 301, and start the pumping equipment to pump the fluidized solidified soil into the grooves on both sides of the pipe gallery 602;

[0116] S5: Start the third electric telescopic rod 403 to extend, so that the trowel plate 401 drops to a predetermined height, the mobile frame 1 moves forward, and the trowel plate 401 trowels the fluidized solidified soil;

[0117] S6: Start the third electric telescopic rod 403 to move up and down, and move the frame 1 forward, so that the trowel plate 401 moves up and down to lightly tamp and flatten the solidified soil, and at the same time drive the central axis of the film roll 501 to rotate, so that the film covers the solidified soil after light tamping and flattening.

[0118] In this embodiment, before backfilling, it can be determined whether the trench needs to be backfilled in sections according to the length of the trench. When backfilling in sections is required, the trench is divided into multiple sections for backfilling by setting baffles. When the pumping equipment pumps the fluidized solidified soil to the trenches on both sides of the pipe gallery 602, the mobile frame 1 does not move, and the fluidized solidified soil flows into the trench by its own fluidity. When the fluidized solidified soil is leveled in step S5, the mobile frame 1 moves forward to level the fluidized solidified soil in the trench. After the fluidized solidified soil is leveled, the mobile frame 1 returns to the initial position and then moves forward to lightly tamp and flatten the fluidized solidified soil in the trench.

[0119] In step S5, when the detection plate 417 collides with an obstacle during the forward movement of the trowel plate 401, the moving frame 1 stops, and the third driving mechanism pushes the trowel plate 401 to disengage from the first driving mechanism and connect to the second driving mechanism. The specific steps are as follows:

[0120] S5.1: When the detection plate 417 collides with an obstacle, the first spring 418 is compressed, the displacement sensor 415 detects the displacement, and the moving frame 1 stops;

[0121] S5.2: Start the fifth electric telescopic rod 411 to push out, so that the second T-shaped slider 412 is flush with the T-shaped slide groove 4011, and start the seventh electric telescopic rod 503 to push out, so that the second push plate 507 is located on one side of the trowel plate 401;

[0122] S5.3: Start the fourth electric telescopic rod 406 and the sixth electric telescopic rod 414 to retract, so that the first limit plate 405 and the second limit plate 413 are retracted, and the limit groove 4012 is separated from the first limit plate 405;

[0123] S5.4: The eighth electric telescopic rod 505 is started to be pushed out, and the second push plate 507 pushes the trowel plate 401 to move forward, the first T-shaped slider 404 is disengaged from the T-shaped slide groove 4011, and the second T-shaped slider 412 is connected to the T-shaped slide groove 4011;

[0124] S5.5: Start the third electric telescopic rod 403 to rise to the initial position, and move the frame 1 forward to make the device avoid obstacles.

[0125] In step S6, when the wiping plate 401 moves forward and reciprocates up and down, when the detection plate 417 collides with an obstacle, the moving frame 1 stops, and the third driving mechanism pushes the wiping plate 401 to disengage from the first driving mechanism and connect with the second driving mechanism to cut off the free end of the film roll 501. The specific steps are as follows:

[0126] S6.1: When the detection plate 417 contacts the obstacle, the first spring 418 is compressed, the displacement sensor 415 detects the displacement, and the moving frame 1 stops;

[0127] S6.2: Start the fifth electric telescopic rod 411 to push out, so that the second T-shaped slide block 412 is flush with the T-shaped slide groove 4011, start the sixth electric telescopic rod 414 to retract, so that the second limit plate 413 is retracted, and start the seventh electric telescopic rod 503 to push out, so that the second push plate 507 is located on the side of the trowel plate 401;

[0128] S6.3: The fourth electric telescopic rod 406 is started to retract, the first limit plate 405 is disengaged from the limit groove 4012 at the current position, the eighth electric telescopic rod 505 is started to push out, the second push plate 507 pushes the trowel plate 401 to move forward, and at the same time drives the film roll 501 to rotate to cover the fluidized solidified soil after light tamping and flattening;

[0129] S6.4: When the first limit plate 405 is aligned with the next limit groove 4012 of the trowel plate 401, the eighth electric telescopic rod 505 stops, the fourth electric telescopic rod 406 is started to extend, the first limit plate 405 is engaged with the limit groove 4012 at the current position, and the third electric telescopic rod 403 is started to reciprocate and rise and fall, and the fluidized solidified soil under the obstacle is lightly compacted and flattened;

[0130] S6.5: The fourth electric telescopic rod 406 is started to retract, the first limiting plate 405 is disengaged from the limiting groove 4012 at the current position, the eighth electric telescopic rod 505 is started to continue to be pushed out, the first T-shaped slider 404 is disengaged from the T-shaped slide groove 4011, the second T-shaped slider 412 is connected to the T-shaped slide groove 4011, and when the limiting groove 4012 is aligned with the second limiting plate 413, the sixth electric telescopic rod 414 is pushed out, and the second limiting plate 413 is engaged with the limiting groove 4012;

[0131] S6.6: The eighth electric telescopic rod 505 is started to continue to be pushed out, and the cutting knife 510 cooperates with the cutting groove 511 to cut the free end of the film roll 501;

[0132] S6.7: Start the third electric telescopic rod 403 to rise to the initial position, and move the frame 1 forward to make the device avoid obstacles.

[0133] In this embodiment, when the third electric telescopic rod 403 rises to the initial position, the mobile frame 1 moves forward, and after the device avoids the obstacle, the screw 408 rotates to make the second drive mechanism and the trowel plate 401 below the second drive mechanism move toward the end close to the first drive mechanism, so that the first T-shaped slider 404 is slidably connected with the T-shaped slide groove 4011, and when the first limit plate 405 is aligned with one of the limit grooves 4012, the fourth electric telescopic rod 406 is pushed out, and the first limit plate 405 is engaged with the limit groove 4012. At the same time, the sixth electric telescopic rod 414 retracts, and the second limit plate 413 is disengaged from the limit groove 4012, and the screw 408 rotates in the opposite direction, so that the second drive mechanism moves toward the end away from the first drive mechanism and the trowel plate 401 until the second drive mechanism returns to the initial position.

[0134] In summary, the present invention realizes the backfilling of the grooves on both sides of the pipe gallery 602 by arranging two groups of backfill construction units on both sides of the mobile frame, and at the same time, by adjusting the distance between the two groups of backfill construction units, it can adapt to the backfilling of the grooves on both sides of the pipe gallery 602 of different diameters. By arranging the first driving mechanism, the second driving mechanism, and the third driving mechanism, when there are obstacles such as the transverse pipe 601 in front of the trowel plate 401, the trowel plate 401 is driven by the third driving mechanism to be separated from the first driving mechanism and connected to the second driving mechanism, so that the device can quickly pass through the obstacle. At the same time, the trowel plate realizes the smoothing and light tamping of the fluidized solidified soil under the obstacle during the switching process, which solves the technical problem that the fluidized solidified soil under the obstacle cannot be smoothed and lightly tamped in the prior art.

[0135] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A pipeline gallery trench backfill construction device based on premixed fluidized solidified soil, characterized in that: It includes a mobile frame, and two groups of backfill construction units arranged on both sides of the mobile frame for backfilling the grooves on both sides of the pipe gallery respectively, and the backfill construction units each include a first mounting frame, and: Solidified soil backfill components, The solidified soil backfill assembly includes a fluidized solidified soil conveying pipeline. During backfill construction, the feed end of the fluidized solidified soil conveying pipeline is connected to the discharge end of the pumping equipment, and the discharge end of the fluidized solidified soil conveying pipeline is located above the trench to be backfilled; Smooth and lightly tamp the components. The trowel and light tamping assembly comprises a trowel plate, and a first driving mechanism and a second driving mechanism for driving the trowel plate to reciprocate up and down to tamp and flatten the fluidized solidified soil. The first driving mechanism and the second driving mechanism are both mounted on the first mounting frame, and the trowel plate is connected to the first driving mechanism or the second driving mechanism. Film covering components, The coating assembly includes a film roll arranged on the first mounting frame, and a third driving mechanism for cutting off the free end of the film roll and pushing the squeegee plate to separate from the first driving mechanism and the second driving mechanism, wherein the third driving mechanism is mounted on the first mounting frame.

2. A pipeline gallery trench backfill construction device based on premixed fluidized solidified soil as claimed in claim 1, characterized in that: A second mounting frame that slides in a vertical direction is disposed at the bottom end of the movable frame, and a first electric telescopic rod that is used to drive the second mounting frame to slide in a vertical direction is installed on the movable frame; Two groups of backfill construction units are slidably arranged on both sides of the second mounting frame, and the two groups of backfill construction units slide along the normal direction of the movement direction of the mobile frame. Second electric telescopic rods for driving the two groups of backfill construction units to slide are installed on the side walls of the second mounting frame.

3. A pipeline gallery trench backfill construction device based on premixed fluidized solidified soil as claimed in claim 2, characterized in that: The first driving mechanism includes a first mounting plate, a third electric telescopic rod, a first T-shaped slider, a first limit plate and a fourth electric telescopic rod; The first mounting plate is mounted on a first mounting frame between the film roll and the conveying pipeline, a third electric telescopic rod that is telescopic in the vertical direction is mounted on the first mounting plate, and a top end of the first T-shaped slider is fixedly connected to a telescopic end of the third electric telescopic rod; The trowel plate is provided with a T-shaped slide groove, the T-shaped slide groove is arranged along the movement direction of the mobile frame, the bottom end of the first T-shaped slider is slidably matched with the T-shaped slide groove, the bottom end of the first T-shaped slider is provided with a first slide groove, the first slide groove is arranged along the normal direction of the movement direction of the mobile frame, the two first limit plates are both slidably arranged in the first slide groove, and two fourth electric telescopic rods for respectively driving the two first limit plates to slide are installed on the top wall of the first slide groove between the two first limit plates; A plurality of limiting grooves are also provided on the two side walls of the T-shaped slide groove, and the limiting grooves are used to cooperate with the two first limiting plates to limit the trowel plate.

4. A pipeline gallery trench backfill construction device based on premixed fluidized solidified soil as claimed in claim 3, characterized in that: The second driving mechanism includes a first guide rod, a screw rod, a first motor, a second mounting plate, a fifth electric telescopic rod, a second T-shaped slider, a second limit plate and a sixth electric telescopic rod; The first guide rod and the screw rod are respectively mounted on the side walls of both sides of the first mounting frame, the axes of the first guide rod and the screw rod are parallel to the movement direction of the mobile frame, the first guide rod and the screw rod are located between the solidified soil backfill assembly and the first driving mechanism, and one end of the screw rod is connected to the power output shaft of the first motor; One end of the second mounting plate is threadedly connected to the screw rod, and the other end of the second mounting plate is slidably connected to the first guide rod. A fifth electric telescopic rod that is telescopic in the vertical direction is mounted on the second mounting plate, and the top end of the second T-shaped slider is fixedly connected to the telescopic end of the fifth electric telescopic rod, and the bottom end of the second T-shaped slider is slidably matched with the T-shaped slide groove; A second slide groove is provided at the bottom end of the second T-shaped slider, and the second slide groove is arranged along the normal direction of the moving direction of the mobile frame. Two second limit plates are slidably arranged in the second slide groove, and two sixth electric telescopic rods for respectively driving the two second limit plates to slide are installed on the top wall of the second slide groove between the two second limit plates, and the two second limit plates cooperate with the limit grooves to limit the trowel plate.

5. A pipeline gallery trench backfill construction device based on premixed fluidized solidified soil as claimed in claim 4, characterized in that: The first driving mechanism further includes an obstacle detection module for detecting obstacles at the front end of the screed plate, wherein the obstacle detection module includes a displacement sensor, a T-shaped strip, a detection plate and a first spring; The displacement sensor, the T-shaped strip and the first spring are all mounted on the side wall of the first T-shaped slider close to the second driving mechanism. A third slide groove is provided on the top of the T-shaped strip, and the third slide groove is arranged parallel to the moving direction of the moving frame. The detection plate slides along the third slide groove, and the top end of the displacement sensor and the other end of the first spring are connected to the side wall of the detection plate. When the detection plate detects an obstacle, the third driving mechanism pushes the screed plate to be separated from the first driving mechanism and connected to the second driving mechanism.

6. A pipeline gallery trench backfill construction device based on premixed fluidized solidified soil as claimed in claim 5, characterized in that: The third driving mechanism includes a third mounting plate, a seventh electric telescopic rod, a fourth mounting plate, an eighth electric telescopic rod, a first push plate, a second push plate, a second guide rod and a second spring; The third mounting plate is mounted on the rear side of the film roll, a seventh electric telescopic rod that is telescopically extended in the vertical direction is mounted on the third mounting plate, the fourth mounting plate is mounted on the telescopic end of the seventh electric telescopic rod, and an eighth electric telescopic rod that is telescopically extended in the moving direction of the moving frame is mounted on the fourth mounting plate; A first push plate is installed at the telescopic end of the eighth electric telescopic rod, the second push plate is located in front of the first push plate, a second guide rod is installed on the side wall of the second push plate close to the first push plate, the second guide rod is slidably connected to the first push plate, a second spring is sleeved on the outer wall of the second guide rod, and both ends of the second spring are respectively connected to the first push plate and the second push plate; A cutting module for cutting off the free end of the film roll is also arranged between the first push plate and the second push plate.

7. A pipeline gallery trench backfill construction device based on premixed fluidized solidified soil as claimed in claim 6, characterized in that: The cutting module includes a cutting knife and a cutting groove; When the eighth electric telescopic rod is in an initial state, the free end of the film roll is located between the first push plate and the second push plate; A cutting knife is also installed on the side wall of the second push plate close to the first push plate, and a cutting groove cooperating with the cutting knife to cut the free end of the film roll is opened on the side wall of the first push plate close to the second push plate.

8. A pipeline gallery trench backfill construction method based on premixed fluidized solidified soil, characterized in that: The pipeline gallery trench backfill construction device based on premixed fluidized solidified soil as claimed in claim 7 is used, and the specific steps are as follows: S1: Start the mobile frame so that the wheels on both sides of the mobile frame are located on both sides of the trench to be backfilled; S2: Start the second electric telescopic rod, and adjust the extension amount of the second electric telescopic rod so that the backfill construction units on both sides are respectively located above the trenches on both sides of the pipe gallery; S3: Start the first electric telescopic rod to push out, so that the first mounting frame is flush with the upper surface of the trench to be backfilled; S4: Connect the discharge end of the pumping equipment to the feed end of the fluidized solidified soil conveying pipeline, and start the pumping equipment to pump the fluidized solidified soil into the trenches on both sides of the pipe gallery; S5: Start the third electric telescopic rod to extend, so that the trowel plate descends to a predetermined height, the mobile frame moves forward, and the trowel plate trowels the fluidized solidified soil; S6: Start the third electric telescopic rod to move up and down, and move the frame forward, so that the trowel plate can move up and down to lightly tamp and flatten the fluidized solidified soil, and at the same time drive the central axis of the film roll to rotate, so that the film covers the fluidized solidified soil that has been lightly tamped and flattened.

9. A pipeline gallery trench backfill construction method based on premixed fluidized solidified soil as claimed in claim 8, characterized in that: In step S5, when the detection plate collides with an obstacle during the forward movement of the wiping plate, the moving frame stops, and the third driving mechanism pushes the wiping plate to separate from the first driving mechanism and connect to the second driving mechanism. The specific steps are as follows: S5.1: When the detection plate collides with the obstacle, the first spring is compressed, the displacement sensor detects the displacement, and the moving frame stops; S5.2: Start the fifth electric telescopic rod to push out, so that the second T-shaped slider is flush with the T-shaped slide groove, and start the seventh electric telescopic rod to push out, so that the second push plate is located on the side of the trowel plate; S5.3: Start the fourth electric telescopic rod and the sixth electric telescopic rod to retract, so that the first limit plate and the second limit plate are retracted, and the limit groove is separated from the first limit plate; S5.4: The eighth electric telescopic rod is started to be pushed out, the second push plate pushes the trowel plate to move forward, the first T-shaped slider is disengaged from the T-shaped slide groove, and the second T-shaped slider is connected to the T-shaped slide groove; S5.5: Start the third electric telescopic rod to rise to the initial position, and move the frame forward to make the device avoid obstacles.

10. A pipeline gallery trench backfill construction method based on premixed fluidized solidified soil as claimed in claim 9, characterized in that: In step S6, when the detection plate collides with an obstacle while the wiping plate moves forward and reciprocates up and down, the moving frame stops, and the third driving mechanism pushes the wiping plate to disengage from the first driving mechanism and connect with the second driving mechanism to cut off the free end of the film roll. The specific steps are as follows: S6.1: When the detection plate collides with the obstacle, the first spring is compressed, the displacement sensor detects the displacement, and the moving frame stops; S6.2: Start the fifth electric telescopic rod to push out, so that the second T-shaped slider is flush with the T-shaped slide groove, start the sixth electric telescopic rod to retract, so that the second limit plate is retracted, and start the seventh electric telescopic rod to push out, so that the second push plate is located on the side of the trowel plate; S6.3: Start the fourth electric telescopic rod to retract, the first limit plate is disengaged from the limit groove at the current position, start the eighth electric telescopic rod to push out, the second push plate pushes the trowel plate to move forward, and at the same time drives the film roll to rotate to cover the fluidized solidified soil after light tamping and flattening; S6.4: When the first limit plate is aligned with the next limit groove of the trowel plate, the eighth electric telescopic rod stops, the fourth electric telescopic rod is started to extend, the first limit plate is engaged with the limit groove at the current position, and the third electric telescopic rod is started to reciprocate and lift, so as to lightly tamp and flatten the fluidized solidified soil under the obstacle; S6.5: The fourth electric telescopic rod is started to retract, the first limit plate is disengaged from the limit groove at the current position, the eighth electric telescopic rod is started to continue to be pushed out, the first T-shaped slider is disengaged from the T-shaped slide groove, the second T-shaped slider is connected to the T-shaped slide groove, when the limit groove is aligned with the second limit plate, the sixth electric telescopic rod is pushed out, and the second limit plate is engaged with the limit groove; S6.6: The eighth electric telescopic rod continues to be pushed out, and the cutting knife cooperates with the cutting groove to cut off the free end of the film roll; S6.7: Start the third electric telescopic rod to rise to the initial position, and move the frame forward to enable the device to avoid obstacles.

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