Groove backfilling method for municipal drainage pipeline in red sandstone stratum

Abstract

The invention relates to a groove backfilling method for a municipal drainage pipeline in a red sandstone stratum. The method comprises the following steps that (1) the construction process of groove backfilling is set according to the characteristics of a groove to be constructed; the characteristics of the groove comprise the dry density, the permeability coefficient and the natural uniaxial compressive strength of the red sandstone stratum where the groove is located, the size of the groove and the pipe diameter of a pipeline in the groove; the construction process comprises the step that a groove is divided into N backfilling areas, and the backfilling areas comprise the area A, the area B, the area C, the area D, the area E and the area F; (2) different types of backfill materials are obtained by controlling a backfill device to accurately prepare materials; and the backfill material is stricken and tamped layer by layer through the rotary strickling mechanism, the inclined hammering device and the rammer in sequence to complete groove backfill. According to the method, the backfilling process of the groove can be mechanized, manual operation is greatly reduced, the working efficiency is improved, and the backfilling quality and the long-term stability of the pipeline are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of municipal drainage, and in particular to a trench backfilling method for a municipal drainage pipeline in a red sandstone stratum. Background Art

[0002] Paleogene and Neogene strata are widely distributed in Northwest my country. The deposition age of red sandstone is relatively new. The red sandstone bedrock under the loess layer is weak in lithology, loose in structure, easy to soften and disintegrate when exposed to water, has strong plasticity, and is easily weathered when exposed to the surface. In pipeline construction, due to its special geological characteristics, the trench backfilling process of red sandstone stratum pipelines is complicated and difficult. However, in the existing technology, most of them use manual tamping. On the one hand, manual tamping requires a lot of manpower for excavation, transportation and tamping, which is labor-intensive, low in work efficiency and slow in progress. On the other hand, the quality of manual tamping is greatly affected by the workers' skill level and work attitude. The construction quality of different workers may vary greatly, and it is difficult to achieve uniformity and density. In addition, there are great safety hazards. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a mechanized trough backfilling device with high backfilling efficiency and good backfilling quality, which is particularly suitable for municipal drainage pipes in red sandstone formations.

[0004] A method for backfilling a trench of a municipal drainage pipe in a red sandstone formation according to the present invention comprises the following steps: 1) Setting the construction process of trench backfilling according to the characteristics of the trench to be constructed; the characteristics of the trench include the dry density, permeability coefficient, natural uniaxial compressive strength of the red sandstone stratum in which the trench is located, the size of the trench, and the diameter of the pipeline in the trench; The construction process includes dividing the trench into N backfill areas, the backfill areas include area A, area B, area C, area D, area E and area F, the area A takes the intersection of the straight edge of the fan-shaped area corresponding to the central angle α of the pipeline and the pipeline circumference as the highest point, and is located below the pipeline; and meets 120°≤α≤150°; area B is the area on both sides of area A; area C is the area on both sides of the pipeline; area E is the area above the pipeline, and the straight-line distance between the highest point of area E and the top of the pipeline is ≥50cm; area D is the area on both sides of area E; area F is the area above area D and area E; 2) The backfill material corresponding to different backfill areas is obtained by controlling the filling bucket and mixing bucket of the backfill device to accurately mix the materials; and the backfill material is scraped and compacted layer by layer through the rotary leveling mechanism, inclined hammering device and tamping machine to complete the trench backfilling.

[0005] Furthermore, the backfilling device of the trench backfilling method of the present invention comprises a bracket, a filling unit and an operating unit; The support comprises a lower frame and an upper frame movably connected to the lower frame; The filling unit comprises a barrel rack fixed on the lower frame, at least one filling barrel is detachably provided on the barrel rack, a mixing barrel is connected to the bottom of the filling barrel through a feeding pipe, and two discharge ports are provided at the bottom of the mixing barrel; The working unit includes at least two mounting plates detachably connected to the upper frame, at least two support beams detachably connected between the mounting plates at both ends, and a movable beam slidably connected to the support beams at both ends. The movable beam includes a movable beam A and a movable beam B. The movable beam A is detachably connected with a tilting hammering device, and the movable beam B is detachably connected with a rammer. Both the movable beam A and the movable beam B are electric telescopic rods.

[0006] Furthermore, the movable crossbeam of the backfilling device of the trench backfilling method of the present invention further comprises a movable crossbeam C, to which a rotary scraping mechanism is detachably connected.

[0007] Furthermore, an electric cylinder is provided between the upper frame and the lower frame of the backfilling device of the trench backfilling method of the present invention.

[0008] Furthermore, the mounting plate of the backfilling device of the trench backfilling method described in the present invention includes a concave lower mounting plate and a convex upper mounting plate, and a mounting hole for mounting the support beam is provided between the lower mounting plate and the upper mounting plate, and the upper mounting plate and the lower mounting plate are fixed by bolts, and the upper mounting plate and the support beam are also fixed by bolts.

[0009] Furthermore, an electric switch is provided at the position where the filling barrel of the backfilling device of the trench backfilling method of the present invention is connected to the feeding pipe, and the filling barrel includes filling barrel A, filling barrel B, filling barrel C and filling barrel D.

[0010] Furthermore, an electric slide rail is provided on the side opposite to the support beam of the backfilling device of the trench backfilling method of the present invention, and sliders cooperating with the electric slide rail are provided at both ends of the movable beam.

[0011] Furthermore, both ends of the lower mounting plate and the upper mounting plate of the backfilling device of the trench backfilling method described in the present invention are provided with hanging ears, and the upper frame is provided with a rectangular socket that cooperates with the mounting plate, and the upper frame is also provided with a groove that cooperates with the hanging ear.

[0012] Furthermore, the mixing barrel of the backfilling device of the trench backfilling method of the present invention is rotatably connected to the lower frame via a rotating shaft.

[0013] Furthermore, the backfilling device of the trench backfilling method of the present invention includes two inclined hammering devices, two tamping machines and two rotary scraping mechanisms.

[0014] Furthermore, the backfilling device of the trench backfilling method of the present invention further includes a control unit, and the control unit is electrically connected to the moving beam A, the moving beam B, the moving beam C, the tilting hammering device, the tamping machine, the rotary scraping mechanism, the electric control switch, the rotating shaft, the electric slide rail, and the electric cylinder; Furthermore, the control unit of the backfilling device of the trench backfilling method of the present invention includes a single chip microcomputer.

[0015] Furthermore, at least two ground spikes capable of penetrating deep into the ground are provided at the bottom of the lower frame of the backfilling device of the trench backfilling method of the present invention, so that the entire device can be made more stable and efficiently complete the trench backfilling operation.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The trench backfilling method for a municipal drainage pipe in a red sandstone formation described in the present invention can firstly mechanize the trench backfilling process, greatly reducing manual operations, which not only improves work efficiency but also greatly reduces safety hazards.

[0017] Secondly, the single-chip microcomputer in the trench backfilling device of the present invention can control the electric control switch to accurately mix different types of backfill materials by inputting the dry density, permeability coefficient, natural uniaxial compressive strength of the red sandstone stratum, and the set density of each backfill area; and the backfill materials are scraped and compacted layer by layer through the rotary scraping mechanism, inclined hammering device and tamping machine to complete the trench backfilling. On the one hand, in the process of backfilling the pipeline trench in the red sandstone bottom layer, the required backfill materials can be refined and customized to ensure the backfill quality and the long-term stability of the pipeline. On the other hand, the backfill quality is further guaranteed through fine zoning.

[0018] In addition, the present invention includes two sets of tamping tools, and especially customized inclined tamping devices are provided for the areas on the two inclined sides of the pipeline to ensure high-quality and efficient backfilling of the area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of trench partitioning in the trench backfilling method of the present invention; Figure 2 It is a structural schematic diagram of the trench backfilling device of the present invention; Figure 3 is a schematic structural diagram of the packing unit 200 of the present invention; Figure 4 It is a structural schematic diagram of the mounting plate 301 of the present invention; Figure 5It is a structural schematic diagram of the movable crossbeam A 3031 of the present invention; Figure 6 It is a structural schematic diagram of the movable crossbeam B 3032 of the present invention; Figure 7 It is a schematic diagram of the structure of the movable crossbeam C 3033 of the present invention; Among them: 100, bracket, 200, filling unit, 300, operation unit; 101, lower frame, 102, upper frame; 201, material barrel rack, 202, filling barrel, 203, mixing barrel, 204, feeding pipe, 2021, filling barrel A, 2022, filling barrel B, 2023, filling barrel C, 2024, filling barrel D, 2031, discharge port; 301. Mounting plate, 302. Support beam, 303. Moving beam, 304. Inclined hammering device, 305. Rammer, 306. Rotating scraping mechanism, 3011. Lower mounting plate, 3012. Upper mounting plate, 3013. Mounting hole, 3014. Hanging ear, 3031. Moving beam A, 3032. Moving beam B, 3033. Moving beam C. DETAILED DESCRIPTION

[0020] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. The described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. If the specific conditions are not specified in the specific implementation method, they shall be carried out according to the conventional conditions or the conditions provided by the manufacturer.

[0021] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims. The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. Specific implementation method 1

[0022] A method for backfilling a trench of a municipal drainage pipe in a red sandstone formation, the method comprising the following steps: 1) Setting the construction process of trench backfilling according to the characteristics of the trench to be constructed; the characteristics of the trench include the dry density, permeability coefficient, natural uniaxial compressive strength of the red sandstone stratum in which the trench is located, the size of the trench, and the diameter of the pipeline in the trench; The construction process includes dividing the trench into N backfill areas, the backfill areas include area A, area B, area C, area D, area E and area F, the area A takes the intersection of the straight edge of the fan-shaped area corresponding to the central angle α of the pipeline and the pipeline circumference as the highest point, and is located below the pipeline; and meets 120°≤α≤150°; area B is the area on both sides of area A; area C is the area on both sides of the pipeline; area E is the area above the pipeline, and the straight-line distance between the highest point of area E and the top of the pipeline is ≥50cm; area D is the area on both sides of area E; area F is the area above area D and area E; 2) The backfill material corresponding to different backfill areas is obtained by controlling the filling bucket and mixing bucket of the backfill device to accurately mix the materials; and the backfill material is scraped and compacted layer by layer through the rotary leveling mechanism, inclined hammering device and tamping machine to complete the trench backfilling.

[0023] In other embodiments, the backfill device includes a support, a filler unit, and an operating unit; The support comprises a lower frame and an upper frame movably connected to the lower frame; The filling unit comprises a barrel rack fixed on the lower frame, at least one filling barrel is detachably provided on the barrel rack, a mixing barrel is connected to the bottom of the filling barrel through a feeding pipe, and two discharge ports are provided at the bottom of the mixing barrel; The working unit includes at least two mounting plates detachably connected to the upper frame, at least two support beams detachably connected between the mounting plates at both ends, and a movable beam slidably connected to the support beams at both ends. The movable beam includes a movable beam A and a movable beam B. The movable beam A is detachably connected with a tilting hammering device, and the movable beam B is detachably connected with a rammer. Both the movable beam A and the movable beam B are electric telescopic rods.

[0024] In other embodiments, the movable beam further comprises a movable beam C, and a rotary scraping mechanism is detachably connected to the movable beam C; An electric cylinder is arranged between the upper frame and the lower frame.

[0025] In other embodiments, the mounting plate includes a concave lower mounting plate and a convex upper mounting plate, and a mounting hole for mounting the support beam is provided between the lower mounting plate and the upper mounting plate. The upper mounting plate and the lower mounting plate are fixed by bolts, and the upper mounting plate and the support beam are also fixed by bolts.

[0026] In other embodiments, an electric switch is provided at the position where the filling barrel is connected to the feeding pipe, and the filling barrels include filling barrel A, filling barrel B, filling barrel C and filling barrel D.

[0027] In other embodiments, an electric slide rail is provided on one side opposite to the support beam, and sliders cooperating with the electric slide rail are provided at both ends of the movable crossbeam.

[0028] In other embodiments, both ends of the lower mounting plate and the upper mounting plate are provided with hanging ears, the upper frame is provided with a rectangular socket that cooperates with the mounting plate, and the upper frame is also provided with a groove that cooperates with the hanging ear.

[0029] In other embodiments, the mixing barrel is rotatably connected to the lower frame via a rotating shaft.

[0030] In other embodiments, there are two inclined hammering devices, two tamping machines and two rotary scraping mechanisms.

[0031] In other embodiments, the trench backfilling device further includes a control unit, and the control unit is electrically connected to the moving beam A, the moving beam B, the moving beam C, the tilting hammering device, the tamping machine, the rotary scraping mechanism, the electric control switch, the rotating shaft, the electric slide rail, and the electric cylinder; The control unit includes a single chip microcomputer.

[0032] In other embodiments, at least two ground spikes capable of penetrating deep into the ground are provided at the bottom of the lower frame. Example 1

[0033] A method for backfilling a trench of a municipal drainage pipe in a red sandstone formation, the method comprising the following steps: 1) Setting the construction process of trench backfilling according to the characteristics of the trench to be constructed; the characteristics of the trench include the dry density, permeability coefficient, natural uniaxial compressive strength of the red sandstone stratum in which the trench is located, the size of the trench, and the diameter of the pipeline in the trench; The construction process includes dividing the trench into N backfill areas, the backfill areas include area A, area B, area C, area D, area E and area F, the area A takes the intersection of the straight edge of the fan-shaped area corresponding to the central angle α of the pipeline and the pipeline circumference as the highest point, and is located below the pipeline; and meets 120°≤α≤150°; area B is the area on both sides of area A; area C is the area on both sides of the pipeline; area E is the area above the pipeline, and the straight-line distance between the highest point of area E and the top of the pipeline is ≥50cm; area D is the area on both sides of area E; area F is the area above area D and area E; 2) The backfill material corresponding to different backfill areas is obtained by controlling the filling barrel 202 and the mixing barrel 203 of the backfill device to accurately mix the materials; and the backfill material is scraped and compacted layer by layer through the rotary leveling mechanism 306, the inclined hammering device 304 and the tamping machine 305) to complete the trench backfilling.

[0034] In this embodiment 1, the backfilling device includes a support 100 , a filling unit 200 and an operation unit 300 .

[0035] like Figure 2 Figure 7 As shown, the support 100 includes a lower frame 101 and an upper frame 102 movably connected to the lower frame; in this embodiment 1, an electric cylinder is provided between the upper frame 102 and the lower frame 101. At least two ground nails that can penetrate deep into the ground are provided at the bottom of the lower frame 101.

[0036] The packing unit 200 includes a barrel rack 201 fixed on the lower frame 101, and at least one packing barrel 202 is detachably provided on the barrel rack 201. A mixing barrel 203 is connected to the lower frame 101 through a feeding pipe 204. Two discharge ports 2031 are provided below the mixing barrel 203, and the mixing barrel 203 is rotatably connected to the lower frame 101 through a rotating shaft. An electric control switch is provided at the position where the packing barrel 202 is connected to the feeding pipe 204; in this embodiment 1, the packing barrels 202 include a packing barrel A 2021, a packing barrel B 2022, a packing barrel C 2023, and a packing barrel D 2024.

[0037] The operation unit 300 includes at least two mounting plates 301 detachably connected to the upper frame 102, the mounting plates 301 include a concave lower mounting plate 3011 and a convex upper mounting plate 3012, between the lower mounting plate 3011 and the upper mounting plate 3012 is a mounting hole 3013 for mounting the support beam 302, the upper mounting plate 3012 is fixed to the lower mounting plate 3011 by bolts, and the upper mounting plate 3012 is also fixed to the support beam 302 by bolts. Both ends of the lower mounting plate 3011 and the upper mounting plate 3012 are provided with hanging ears 3014, the upper frame 102 is provided with a rectangular plug hole, the rectangular plug hole cooperates with the mounting plate 301, and the upper frame 102 is also provided with a groove that cooperates with the hanging ear 3014.

[0038] The operation unit 300 also includes at least two support beams 302, both ends of which are detachably connected to the mounting plate 301, and a moving beam 303, both ends of which are slidably connected to the support beams 302, the moving beam 303 includes a moving beam A 3031 and a moving beam B 3032, the moving beam A 3031 is detachably connected to a tilting hammering device 304, the moving beam B 3032 is detachably connected to a tamping machine 305, and both the moving beam A 3031 and the moving beam B 3032 are electric telescopic rods. The moving beam 303 also includes a moving beam C 3033, and the moving beam C 3033 is detachably connected to a rotating scraping mechanism 306.

[0039] In this embodiment 1, an electric slide rail is provided on the opposite side of the support beam 302, and sliders cooperating with the electric slide rail are provided at both ends of the movable cross beam 303. The inclined hammering device 304, the tamping machine 305 and the rotary leveling mechanism 306 are each two.

[0040] The trench backfilling device also includes a control unit, which is electrically connected to the moving beam A 3031, the moving beam B 3032, the moving beam C 3033, the tilting hammering device 304, the tamping machine 305, the rotary scraping mechanism 306, the electric control switch, the rotating shaft, the electric slide rail, and the electric cylinder; the control unit includes a single-chip microcomputer.

[0041] In this embodiment 1, the process of backfilling a trench using the trench backfilling device of the present invention specifically includes the following steps: 1) The control unit sets the construction process of trench backfilling according to the characteristics of the trench to be constructed.

[0042] In this embodiment 1, the groove is in a red sandstone formation. The characteristics of the groove include the dry density, permeability, natural uniaxial compressive strength of the red sandstone formation in which the groove is located, the size of the groove, and the diameter of the pipe in the groove.

[0043] The construction process includes the backfill zoning of the trench; the batching of each backfill area; the length of the moving beam A 3031 and the moving beam B 3032; the movement trajectory of the moving beam A 3031, the moving beam B 3032 and the moving beam C 3033; the pounding force, pounding frequency, pounding time, and movement trajectory of the inclined pounding device 304; the tamping force, operating frequency, operating time, and movement trajectory of the tamping machine 305; the working condition of the electric cylinder; and the working condition of the rotating shaft of the mixing barrel 203.

[0044] In this embodiment 1, the backfill area is divided into area A, area B, area C, area D, area E and area F. Figure 1As shown, the area A takes the intersection of the straight edge of the fan-shaped area corresponding to the central angle α of the pipeline and the pipeline circumference as the highest point, and is located in the area below the pipeline; and meets 120°≤α≤150°, and the density of area A is ≥95%. The area B is the area on both sides of area A, and the density is 95%. Area C is the area on both sides of the pipeline, and the density is 95%. Area E is the area above the pipeline, and the straight-line distance from the highest point of area E to the top of the pipeline is 50cm, and the density of area E is 85%. Area D is the area on both sides of area E, and the density is 90%. Area F is the area above areas D and E, and the density is ≥93%. Ensure that the thickness of each backfill layer does not exceed 20cm during the backfill process.

[0045] 2) Red sandstone, medium-coarse sand, lime soil and concrete are respectively filled into the filling barrel A 2021, filling barrel B 2022, filling barrel C 2023 and filling barrel D 2024.

[0046] 3) The bracket 100 is fixed to both sides of the groove and further fixed by ground nails at the bottom of the lower frame 101. The upper frame 102 is adjusted to a suitable height by an electric cylinder according to the size of the groove.

[0047] 4) According to the diameter of the pipe in the groove, the two support beams 302 in the mounting hole 3013 are adjusted to a suitable position and fixed; at the same time, the movable beam A 3031 and the movable beam B 3032 are adjusted to a suitable length.

[0048] 5) Start the start button, the control unit controls the electric switch of the filling barrel 202 and the mixing barrel 203 to obtain the first type of backfill material; the first type of backfill material is sent to both sides of the pipeline according to the amount of the first backfill layer. The moving beam C 3033 and the rotating scraping mechanism 306 are started to scrape the first type of backfill material on both sides of the pipeline along the length direction of the groove.

[0049] 6) Start the moving beam A 3031 to move along the length direction of the trench, and simultaneously backfill the first layer of area A with the inclined hammering devices 304 on both sides of the pipeline until the target density is reached.

[0050] 7) The control unit starts the moving beam B 3032 to move along the length direction of the trench, and simultaneously backfills the first layer of area B with the tampers 305 on both sides of the pipeline until the target density is reached. The position of the tampers 305 on the moving beam B 3032 can be manually adjusted according to the width of area B to ensure that the first layer of the entire area B is evenly backfilled.

[0051] 8) The control unit controls the electric cylinder to move the upper frame 102 upwards, and after adjusting it to a suitable height, repeats the above steps 5) to 7) until the backfilling of the entire A area and B area is completed.

[0052] 9) The control unit controls the electric cylinder to move the upper frame 102 upwards, and after adjusting it to a suitable height, it continues to control the electric switch of the filling barrel 202 and the mixing barrel 203 to obtain the second type of backfill material; the second type of backfill material is sent to both sides of the pipeline according to the filling amount of the corresponding backfill layer. The moving crossbeam C 3033 and the rotating scraping mechanism 306 are started to scrape the second type of backfill material on both sides of the pipeline along the length direction of the groove.

[0053] 10) The control unit directly starts the moving beam B 3032 to move along the length of the trench, and the tampers 305 on both sides of the pipeline simultaneously backfill the first layer of the C zone until the target density. The position of the tampers 305 on the moving beam B 3032 can be manually adjusted according to the width of the C zone to ensure that the first layer of the entire C zone is evenly backfilled.

[0054] 11) The control unit controls the electric cylinder to move the upper frame 102 upwards, and after adjusting it to a suitable height, repeats the above steps 9) and 10) until the backfilling of the entire C area is completed.

[0055] 12) Repeat the above steps 9) to 11) to complete the backfilling of areas D and E with the third type of backfill material, and the backfilling of area F with the fourth type of backfill material.

[0056] The above-mentioned specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for backfilling a trench of a municipal drainage pipe in a red sandstone formation, characterized in that: The method comprises the following steps: 1) Setting the construction process of trench backfilling according to the characteristics of the trench to be constructed; the characteristics of the trench include the dry density, permeability coefficient, natural uniaxial compressive strength of the red sandstone stratum in which the trench is located, the size of the trench, and the diameter of the pipeline in the trench; The construction process includes dividing the trench into N backfill areas, the backfill areas include area A, area B, area C, area D, area E and area F, the area A takes the intersection of the straight edge of the fan-shaped area corresponding to the central angle α of the pipeline and the pipeline circumference as the highest point, and is located below the pipeline; and meets 120°≤α≤150°; area B is the area on both sides of area A; area C is the area on both sides of the pipeline; area E is the area above the pipeline, and the straight-line distance between the highest point of area E and the top of the pipeline is ≥50cm; area D is the area on both sides of area E; area F is the area above area D and area E; 2) The backfill material corresponding to different backfill areas is obtained by controlling the filling barrel (202) and the mixing barrel (203) of the backfilling device to accurately mix the materials; and the backfill material is scraped and compacted layer by layer through the rotating leveling mechanism (306), the tilting hammering device (304) and the tamping machine (305) to complete the trench backfilling.

2. The trench backfilling method according to claim 1, characterized in that: The backfilling device comprises a support (100), a filling unit (200) and an operation unit (300); The support (100) comprises a lower frame (101) and an upper frame (102) movably connected to the lower frame; The filling unit (200) comprises a material barrel frame (201) fixed on the lower frame (101), at least one filling barrel (202) being detachably provided on the material barrel frame (201), a mixing barrel (203) being connected below the filling barrel (202) via a feeding pipe (204), and two discharge ports (2031) being provided below the mixing barrel (203); The operation unit (300) comprises at least two mounting plates (301) detachably connected to the upper frame (102), at least two support beams (302) whose two ends are detachably connected between the mounting plates (301), and a moving beam (303) whose two ends are slidably connected to the support beams (302), wherein the moving beam (303) comprises a moving beam A (3031) and a moving beam B (3032), wherein the moving beam A (3031) is detachably connected to a tilting hammering device (304), and the moving beam B (3032) is detachably connected to a tamping machine (305), and both the moving beam A (3031) and the moving beam B (3032) are electric telescopic rods; The movable crossbeam (303) further comprises a movable crossbeam C (3033), and a rotary scraping mechanism (306) is detachably connected to the movable crossbeam C (3033); An electric cylinder is provided between the upper frame (102) and the lower frame (101).

3. The trench backfilling method according to claim 2, characterized in that: The mounting plate (301) comprises a concave lower mounting plate (3011) and a convex upper mounting plate (3012); between the lower mounting plate (3011) and the upper mounting plate (3012) is a mounting hole (3013) for mounting the support beam (302); the upper mounting plate (3012) and the lower mounting plate (3011) are connected and fixed by bolts; the upper mounting plate (3012) and the support beam (302) are also connected and fixed by bolts.

4. The trench backfilling method according to claim 3, characterized in that: An electric switch is provided at a position where the filling barrel (202) is connected to the feeding pipe (204), and the filling barrel (202) comprises a filling barrel A (2021), a filling barrel B (2022), a filling barrel C (2023), and a filling barrel D (2024).

5. The trench backfilling method according to claim 4, characterized in that: An electric slide rail is provided on one side opposite to the support beam (302), and sliding blocks cooperating with the electric slide rail are provided at both ends of the movable cross beam (303).

6. The trench backfilling method according to claim 5, characterized in that: Both ends of the lower mounting plate (3011) and the upper mounting plate (3012) are provided with hanging ears (3014), the upper frame (102) is provided with a rectangular plug hole, the rectangular plug hole cooperates with the mounting plate (301), and the upper frame (102) is also provided with a groove that cooperates with the hanging ear (3014).

7. The trench backfilling method according to claim 6, characterized in that: The mixing barrel (203) is rotatably connected to the lower frame (101) via a rotating shaft.

8. The trench backfilling method according to claim 7, characterized in that: There are two of each of the inclined pounding device (304), the tamping machine (305) and the rotary scraping mechanism (306).

9. The trench backfilling method according to claim 8, characterized in that: The trench backfilling device further comprises a control unit, wherein the control unit is electrically connected to the movable beam A (3031), the movable beam B (3032), the movable beam C (3033), the tilting hammering device (304), the tamping machine (305), the rotary leveling mechanism (306), the electric control switch, the rotating shaft, the electric slide rail, and the electric cylinder; The control unit includes a single chip microcomputer.

10. The trench backfilling method according to claim 9, characterized in that: The bottom of the lower frame (101) is provided with at least two ground spikes capable of penetrating deep into the ground.

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