Corrugated steel pipe culvert bottom filling soil compaction device and compaction method

Abstract

The invention relates to the technical field of geotechnical engineering, in particular to a compaction device and method for filling soil at the bottom of a corrugated steel pipe culvert, and the compaction device comprises a soil filling supporting unit, a soil filling positioning unit, a soil filling unit and a soil filling compaction unit; the soil filling space is formed by the soil filling positioning unit and the soil filling unit, on one hand, soil filling can be conducted in the soil filling space, the soil filling space is close to the corrugated steel pipe culvert, compaction is conducted through the soil filling compaction unit, and the soil filling compaction requirements of corrugated steel pipe culverts of different sizes can be met; and on the other hand, layered multi-time compaction can be achieved by adjusting the size of the soil filling space according to different requirements, so that earthwork compaction is more uniform, and the compaction reliability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical engineering, and in particular to a device and method for compacting soil filling at the bottom of a corrugated steel pipe culvert. Background Art

[0002] Corrugated steel pipe culverts are widely used drainage and channel structures in roads, railways and municipal engineering. The quality of the bottom fill compaction directly determines the bearing capacity, deformation resistance and long-term service performance of the pipe culvert.

[0003] The mechanical properties of corrugated steel pipe culverts are highly dependent on the pipe-soil synergistic mechanism. The culvert bottom fill serves as the force transmission medium between the pipe body and the foundation, and its density and uniformity directly affect the load distribution state.

[0004] If the fill is insufficiently compacted or has localized loose areas, the pipe body will be subjected to asymmetric forces due to the coupling of multiple factors such as vehicle dynamic loads, soil deadweight, and groundwater seepage. This can cause circumferential deformation and instability of the pipe wall and misalignment of the interface at the least, or even lead to overall settlement of the pipe body, axis deviation, and even the formation of leakage channels due to the separation of the pipe wall from the soil, increasing the risk of foundation hollowing and seriously threatening project safety. The limitations of traditional compaction technology are further highlighted, especially in scenarios with soft soil foundations, high fills, or frequent dynamic loads: First, conventional large equipment such as rollers and plate compactors are limited by the narrow space inside the culvert and the curved structure of the pipe bottom, making it difficult to operate close to it, resulting in a compaction blind spot near the pipe wall. Secondly, although manual handheld rammers can partially improve the density, they are inefficient and labor-intensive, and there is a lack of quantitative control over the tamping energy and number of times. This can easily cause damage to the filler gradation or excessive compaction that can damage the anti-corrosion coating on the pipe wall, and cannot meet the actual needs of fill compaction operations. Summary of the Invention

[0005] The purpose of the present invention is to provide a corrugated steel pipe culvert bottom fill compaction device and compaction method to solve the technical problems existing in the prior art.

[0006] The present invention solves the above-mentioned technical problems by: A corrugated steel pipe culvert bottom fill compaction device comprises a fill support unit, a fill positioning unit, a fill unit and a fill compaction unit; The fill support unit is used to support the fill unit, and the fill positioning unit is used to be arranged on the side of the corrugated steel pipe culvert and connected to the corrugated steel pipe culvert; the fill unit is connected to the fill positioning unit, and the fill unit is facing the corrugated steel pipe culvert, so that a fill space is formed between the fill unit and the corrugated steel pipe culvert; the fill compaction unit is connected to the fill unit, and compacts the soil in the fill space by driving the fill unit.

[0007] It is further defined that the fill support unit includes a support base, a support sleeve, a support rod and a support adjustment mechanism, the bottom of the support sleeve is arranged on the support base, the support sleeve is sleeved on the outside of the support rod, and the support sleeve is movably connected to the support rod through the support adjustment mechanism; the top of the support rod is connected to the fill unit.

[0008] .The corrugated steel pipe culvert bottom fill compaction device according to claim is characterized in that the fill support unit also includes a roller and a roller locking mechanism; the roller is rotatably connected to the support base, and the roller locking mechanism cooperates with the roller.

[0009] It is further defined that the fill positioning unit includes two retaining side plates, and the retaining side plates are provided with retaining adjustment grooves; The retaining side plates are arranged vertically, and the contact ends of the retaining side plates are arc-shaped. The contact ends of the retaining side plates cooperate with the sides of the corrugated steel pipe culvert. The retaining adjustment grooves are close to the contact ends of the retaining side plates. The fill unit is arranged between the two retaining side plates. The fill unit is movably connected to the retaining adjustment grooves. A fill space with an open top is formed between the two retaining side plates, the fill unit and the corrugated steel pipe culvert. The fill compaction unit is arranged on the outside of the fill unit; the fill support unit is arranged between the two retaining side plates.

[0010] It is further defined that the fill positioning unit further includes an adjustment groove baffle, the adjustment groove baffle covers the outer side of the retaining adjustment groove, and the adjustment groove baffle is detachably connected to the retaining side plate.

[0011] It is further defined that the fill positioning unit also includes a ground anchor, and the number of the ground anchors is multiple, and the multiple ground anchors are respectively arranged at the bottom of the two retaining side plates, and the multiple ground anchors located on the same retaining side plate are spaced apart along the length direction of the retaining side plate.

[0012] It is further defined that the fill compacting unit includes a first bearing plate, a second bearing plate and a small rammer, the first bearing plate is connected to the second bearing plate, and the small rammer is respectively arranged on the first bearing plate and the second bearing plate; The first bearing plate is arranged at the back of the filling unit, the second bearing plate is arranged at the bottom of the filling unit, and the second bearing plate faces the bottom of the corrugated steel pipe culvert. A filling space with an open top is formed between the two retaining side plates, the filling unit, the second bearing plate and the corrugated steel pipe culvert.

[0013] It is further defined that the number of the small rammers is multiple, and the multiple small rammers are arranged in an array on the first supporting plate and the second supporting plate; the small rammers are respectively connected to the first supporting plate and the second supporting plate through elastic members; The soil filling and compacting unit further includes a traction line, and the first bearing plate is connected to the soil filling unit via the traction line.

[0014] It is further defined that the soil filling unit includes a soil filling baffle, a soil filling positioning wheel and a bearing plate connecting member; The soil filling positioning wheels are arranged on the left and right sides of the soil filling baffle, the soil filling baffle is movably connected to the retaining adjustment groove through the soil filling positioning wheels, and the traction line is connected between the soil filling positioning wheels and the first bearing plate; The bearing plate connecting piece is arranged at the bottom of the fill baffle, the first bearing plate is arranged on the back of the fill baffle, and the second bearing plate is arranged at the bottom of the fill baffle. The fill baffle is connected to the first bearing plate and the second bearing plate respectively through the bearing plate connecting piece. The bearing plate connecting piece cooperates with the retaining adjustment groove, and the top of the support rod is movably connected to the back of the fill baffle.

[0015] A method for compacting the bottom fill of a corrugated steel pipe culvert is based on the above-mentioned device for compacting the bottom fill of a corrugated steel pipe culvert, comprising the following steps: S1. Move the fill positioning unit so that the fill positioning unit contacts the side of the corrugated steel pipe culvert; S2. Connect the fill unit to the fill positioning unit and support the fill unit with the fill support unit to form a fill space between the fill unit and the corrugated steel pipe culvert; S3, filling the earthwork into the earth filling space obtained in step S2; S4, start the fill compaction unit to perform compaction; S5, determine whether the corrugated steel pipe culvert bottom fill compaction is completed, if so, end, if not, execute step S6; S6. Adjust the connection position between the filling unit and the filling positioning unit to increase the filling space; S7, filling the earthwork into the fill space added in step S6; S8, start the fill compaction unit to perform compaction; S9: Determine whether the corrugated steel pipe culvert bottom fill and compaction are completed. If yes, end; if not, execute step S6.

[0016] The beneficial effects of the present invention are: 1. The present invention utilizes a fill positioning unit and a fill unit to form a fill space. On the one hand, by filling the fill space with soil, the fill space is close to the corrugated steel pipe culvert, and is compacted by the fill compaction unit, so as to adapt to the fill compaction requirements of corrugated steel pipe culverts of different sizes. On the other hand, by adjusting the size of the fill space according to different needs, multiple layered compaction can be achieved, so that the earthwork compaction is more uniform and the reliability of compaction is improved.

[0017] 2. The present invention can further improve the uniform distribution of fill by distributing small rammers, and can effectively prevent the rigid rammer from scratching and damaging the anti-corrosion coating on the pipe wall, thereby improving work efficiency and the reliability of fill compaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the corrugated steel pipe culvert bottom fill compaction device of the present invention; Figure 2 This is a schematic diagram of the overall structure of the flight support platform described in Example 1 of the present invention; Figure 3 This is a schematic diagram of the overall structure of the mobile platform described in Example 3 of the present invention; In the figure, 10-fill support unit; 11-support base; 12-support sleeve; 13-support rod; 14-support adjustment mechanism; 15-roller; 20-fill positioning unit; 21-retaining side plate; 22-retaining adjustment groove; 23-adjustment groove baffle; 24-ground anchor; 30-fill unit; 31-fill baffle; 32-fill positioning wheel; 33-bearing plate connector; 40-fill compacting unit; 41-first bearing plate; 42-second bearing plate; 43-small rammer; 44-traction line; 50-corrugated steel pipe culvert. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "inner," etc. appear to indicate an orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc. are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Example 1 refer to Figure 1 The present invention provides a corrugated steel pipe culvert bottom fill compaction device, comprising a fill support unit 10, a fill positioning unit 20, a fill unit 30 and a fill compaction unit 40; the fill support unit 10 is used to support the fill unit 30, and the fill positioning unit 20 is used to be arranged on the side of the corrugated steel pipe culvert 50 and connected to the corrugated steel pipe culvert 50; the fill unit 30 is connected to the fill positioning unit 20, and the fill unit 30 is oriented towards the corrugated steel pipe culvert 50, so that a fill space is formed between the fill unit 30 and the corrugated steel pipe culvert 50; the fill compaction unit 40 is connected to the fill unit 30, and compacts the soil in the fill space by driving the fill unit 30.

[0025] Specifically, refer to Figure 2 The fill support unit 10 includes a support base 11, a support sleeve 12, a support rod 13 and a support adjustment mechanism 14. The bottom of the support sleeve 12 is set on the support base 11, and the support sleeve 12 is sleeved on the outside of the support rod 13. The support sleeve 12 is movably connected to the support rod 13 through the support adjustment mechanism 14; the top of the support rod 13 is connected to the fill unit 30.

[0026] The support base 11 is supported on the ground, and the support sleeve 12 is preferably hinged to the support base 11 so that the support sleeve 12 is rotatably connected to the support base 11. The angle between the support sleeve 12 and the vertical direction can be adjusted according to work requirements to provide reliable support for the filling unit 30.

[0027] The support adjustment mechanism 14 is used to adjust the length of the support rod 13 extending from the support sleeve 12 to adapt to different height adjustments of the filling unit 30.

[0028] Among them, the support adjustment mechanism 14 can be optionally telescopically driven. Preferably, the support adjustment mechanism 14 includes a gear, a rack and a gear drive. The fixed end of the gear drive is connected to the support sleeve 12, and the output end of the gear drive is connected to the gear. The rack is vertically arranged on the support rod 13, and the gear cooperates with the rack. The gear drive and the gear drive drive the support rod 13 to move up and down along the support sleeve 12.

[0029] Preferably, in order to facilitate the movement of the support base 11, the fill support unit 10 also includes a roller 15 and a roller locking mechanism; the roller 15 is rotatably connected to the support base 11, and the roller locking mechanism cooperates with the roller 15. When adjusting the position of the support base 11, the roller 15 can be used to move quickly and efficiently; after the movement is completed, the roller locking mechanism is used to limit the movement of the roller 15 to ensure stable and reliable support.

[0030] For further explanation, see Figure 1 and Figure 3 The fill positioning unit 20 includes two retaining side plates 21, and a retaining adjustment groove 22 is provided on the retaining side plates 21; the retaining side plates 21 are vertically arranged, and the contact end of the retaining side plate 21 is arc-shaped. The contact end of the retaining side plate 21 cooperates with the side of the corrugated steel culvert 50, and the retaining adjustment groove 22 is close to the contact end of the retaining side plate 21. The fill unit 30 and the fill support unit 10 are both arranged between the two retaining side plates 21.

[0031] The filling unit 30 is movably connected to the retaining adjustment groove 22 . A filling space with an open top is formed between the two retaining side plates 21 , the filling unit 30 and the corrugated steel pipe culvert 50 . The filling compacting unit 40 is arranged outside the filling unit 30 .

[0032] In actual work, the contact end of the retaining side plate 21 is preferably matched with the corresponding outer wall of the corrugated steel pipe culvert 50, so that the retaining side plate 21 is in reliable contact with the corrugated steel pipe culvert 50 to avoid leakage during filling; the top of the filling space is open, and soil can be added along its top during filling. The soil is accumulated on the side end of the corrugated steel pipe culvert 50 in the filling space to support the corrugated steel pipe culvert 50. At the same time, the filling unit 30 is driven by the filling compaction unit 40 to compact the soil accumulated in the filling space, thereby improving work efficiency and adapting to different work needs.

[0033] In order to improve the reliability of the fill space, the fill positioning unit 20 preferably also includes an adjustment groove baffle 23, which covers the outer side of the retaining adjustment groove 22, and the adjustment groove baffle 23 is detachably connected to the retaining side plate 21; when in use, the adjustment groove baffle 23 is used to cover the side end face corresponding to the retaining adjustment groove 22 to prevent soil from leaking out and reducing the compaction effect.

[0034] To further illustrate, the fill positioning unit 20 also includes a plurality of ground anchors 24, which are respectively arranged at the bottom of the two retaining side plates 21. The plurality of ground anchors 24 located on the same retaining side plate 21 are spaced apart along the length direction of the retaining side plate 21 to improve the stability and reliability of the fill space.

[0035] refer to Figure 1 and Figure 2 The filling and compacting unit 40 includes a first bearing plate 41, a second bearing plate 42 and a small rammer 43. The first bearing plate 41 is connected to the second bearing plate 42, and the small rammer 43 is respectively arranged on the first bearing plate 41 and the second bearing plate 42.

[0036] The first bearing plate 41 is arranged at the back of the fill unit 30, and the second bearing plate 42 is arranged at the bottom of the fill unit 30. The second bearing plate 42 faces the bottom of the corrugated steel pipe culvert 50. A fill space with an open top is formed between the two retaining side plates 21, the fill unit 30, the second bearing plate 42 and the corrugated steel pipe culvert 50.

[0037] There are multiple small rammers 43 , which are arranged in an array on the first supporting plate 41 and the second supporting plate 42 . The small rammers 43 are connected to the first supporting plate 41 and the second supporting plate 42 through elastic members.

[0038] During the working process, the first bearing plate 41 drives the upper part of the filling unit 30 to compact the soil in the filling space, and the second bearing plate 42 drives the lower part of the filling unit 30 to compact the soil near the corrugated steel culvert 50 in the filling space, further improving the compaction reliability of the soil and improving work efficiency.

[0039] Preferably, the fill compaction unit 40 also includes a traction line 44, and the first bearing plate 41 is connected to the fill unit 30 through the traction line 44 to ensure a stable and reliable connection. It is further preferred that a tension sensor is provided at the end of the traction line 44 to feedback the tamping force of the small rammer 43, and adaptively adjust the tamping force and tamping frequency of the fill compaction, so as to perform compaction operations more accurately and reliably, avoid rigid contact that damages the anti-corrosion layer of the pipe wall, and improve the operation quality.

[0040] Further explanation, the filling unit 30 includes a filling baffle 31, a filling positioning wheel 32 and a bearing plate connecting member 33; the filling positioning wheel 32 is arranged on the left and right sides of the filling baffle 31, and the filling baffle 31 is movably connected to the retaining adjustment groove 22 through the filling positioning wheel 32, the traction line 44 is connected between the filling positioning wheel 32 and the first bearing plate 41, and the top of the support rod 13 is connected to the back of the filling baffle 31.

[0041] The bearing plate connecting piece 33 is arranged at the bottom of the fill baffle 31, the first bearing plate 41 is arranged on the back of the fill baffle 31, and the second bearing plate 42 is arranged at the bottom of the fill baffle 31. The fill baffle 31 is connected to the first bearing plate 41 and the second bearing plate 42 respectively through the bearing plate connecting piece 33. The bearing plate connecting piece 33 cooperates with the retaining adjustment groove 22, and the top of the support rod 13 is movably connected to the back of the fill baffle 31.

[0042] During the actual working process, the support adjustment mechanism 14 can drive the support rod 13 to move upward, and the fill baffle 31 can be driven to move upward synchronously. When the fill baffle 31 moves upward, the fill positioning wheel 32 slides along the retaining adjustment groove 22. While the fill baffle 31 moves away from the corrugated steel culvert 50, the angle between the fill baffle 31 and the vertical direction decreases, and the first bearing plate 41 moves with the fill baffle 31, and the bottom of the second bearing plate 42 remains in contact with the ground, thereby increasing the fill space to meet the needs of different fill space sizes, or perform multiple fill compaction operations according to needs, compacting layer by layer.

[0043] Example 2 Based on the corrugated steel pipe culvert bottom fill compaction device provided in Example 1, this embodiment provides a corrugated steel pipe culvert bottom fill compaction method, comprising the following steps: S1. Move the fill positioning unit 20 so that the fill positioning unit 20 contacts the side of the corrugated steel pipe culvert 50; S2. Connect the fill unit 30 to the fill positioning unit 20 and support the fill unit 30 with the fill supporting unit 10 to form a fill space between the fill unit 30 and the corrugated steel pipe culvert 50; S3, filling the earthwork into the earth filling space obtained in step S2; S4, start the soil filling compaction unit 40 to perform compaction; S5, determine whether the corrugated steel pipe culvert bottom fill compaction is completed, if so, end, if not, execute step S6; S6, adjusting the connection position between the filling unit 30 and the filling positioning unit 20 to increase the filling space; S7, filling the earthwork into the fill space added in step S6; S8, start the soil filling compaction unit 40 to perform compaction; S9: Determine whether the corrugated steel pipe culvert bottom fill and compaction are completed. If yes, end; if not, execute step S6.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the present invention.

Claims

1. A corrugated steel pipe culvert bottom fill compaction device, characterized in that: It comprises a fill support unit (10), a fill positioning unit (20), a fill unit (30) and a fill compacting unit (40); The fill support unit (10) is used to support the fill unit (30), and the fill positioning unit (20) is used to be arranged on the side of the corrugated steel pipe culvert (50) and connected to the corrugated steel pipe culvert (50); the fill unit (30) is connected to the fill positioning unit (20), and the fill unit (30) faces the corrugated steel pipe culvert (50), so that a fill space is formed between the fill unit (30) and the corrugated steel pipe culvert (50); the fill compacting unit (40) is connected to the fill unit (30) and compacts the earth in the fill space by driving the fill unit (30).

2. The corrugated steel pipe culvert bottom fill compaction device according to claim 1, characterized in that: The fill support unit (10) comprises a support base (11), a support sleeve (12), a support rod (13) and a support adjustment mechanism (14); the bottom of the support sleeve (12) is arranged on the support base (11), the support sleeve (12) is sleeved on the outside of the support rod (13), and the support sleeve (12) is movably connected to the support rod (13) through the support adjustment mechanism (14); the top of the support rod (13) is connected to the fill unit (30).

3. The corrugated steel pipe culvert bottom fill compaction device according to claim 2, characterized in that: The soil filling support unit (10) further comprises a roller (15) and a roller locking mechanism; the roller (15) is rotatably connected to the support base (11), and the roller locking mechanism cooperates with the roller (15).

4. The corrugated steel pipe culvert bottom fill compaction device according to claim 1, characterized in that: The soil filling positioning unit (20) comprises two soil retaining side plates (21), and soil retaining adjustment grooves (22) are provided on the soil retaining side plates (21); The retaining side plate (21) is vertically arranged, and the contact end of the retaining side plate (21) is arc-shaped. The contact end of the retaining side plate (21) cooperates with the side of the corrugated steel pipe culvert (50). The retaining adjustment groove (22) is close to the contact end of the retaining side plate (21). The filling unit (30) is arranged between the two retaining side plates (21). The filling unit (30) is movably connected to the retaining adjustment groove (22). A filling space with an open top is formed between the two retaining side plates (21), the filling unit (30) and the corrugated steel pipe culvert (50). The filling compacting unit (40) is arranged outside the filling unit (30); and the filling support unit (10) is arranged between the two retaining side plates (21).

5. The corrugated steel pipe culvert bottom fill compaction device according to claim 4, characterized in that: The soil filling positioning unit (20) further comprises an adjustment groove retaining bar (23), the adjustment groove retaining bar (23) covering the outside of the soil retaining adjustment groove (22), and the adjustment groove retaining bar (23) is detachably connected to the soil retaining side plate (21).

6. The corrugated steel pipe culvert bottom fill compaction device according to claim 5, characterized in that: The fill positioning unit (20) further includes a ground anchor (24), wherein the number of the ground anchors (24) is multiple, and the multiple ground anchors (24) are respectively arranged at the bottom of the two retaining side plates (21), and the multiple ground anchors (24) located on the same retaining side plate (21) are spaced apart along the length direction of the retaining side plate (21).

7. The corrugated steel pipe culvert bottom fill compaction device according to claim 5, characterized in that: The soil filling compacting unit (40) comprises a first bearing plate (41), a second bearing plate (42) and a small soil tamping machine (43), wherein the first bearing plate (41) is connected to the second bearing plate (42), and the small soil tamping machine (43) is respectively arranged on the first bearing plate (41) and the second bearing plate (42); The first bearing plate (41) is arranged at the back of the filling unit (30), the second bearing plate (42) is arranged at the bottom of the filling unit (30), the second bearing plate (42) faces the bottom of the corrugated steel pipe culvert (50), and a filling space with an open top is formed between the two retaining side plates (21), the filling unit (30), the second bearing plate (42) and the corrugated steel pipe culvert (50).

8. The corrugated steel pipe culvert bottom fill compaction device according to claim 7, characterized in that: There are multiple small ramming machines (43), and the multiple small ramming machines (43) are arranged in an array on the first bearing plate (41) and the second bearing plate (42); the small ramming machines (43) are respectively connected to the first bearing plate (41) and the second bearing plate (42) through elastic members; The soil filling compacting unit (40) further includes a traction line (44), and the first bearing plate (41) is connected to the soil filling unit (30) via the traction line (44).

9. The corrugated steel pipe culvert bottom fill compaction device according to claim 7, characterized in that: The soil filling unit (30) comprises a soil filling baffle (31), a soil filling positioning wheel (32) and a bearing plate connecting member (33); The soil filling positioning wheels (32) are arranged on the left and right sides of the soil filling baffle (31), the soil filling baffle (31) is movably connected to the retaining adjustment groove (22) through the soil filling positioning wheels (32), and the traction line (44) is connected between the soil filling positioning wheels (32) and the first bearing plate (41); The bearing plate connecting member (33) is arranged at the bottom of the filling baffle (31), the first bearing plate (41) is arranged at the back of the filling baffle (31), and the second bearing plate (42) is arranged at the bottom of the filling baffle (31). The filling baffle (31) is connected to the first bearing plate (41) and the second bearing plate (42) respectively through the bearing plate connecting member (33). The bearing plate connecting member (33) cooperates with the retaining adjustment groove (22), and the top of the support rod (13) is movably connected to the back of the filling baffle (31).

10. A method for compacting the bottom fill of a corrugated steel pipe culvert, characterized in that: The corrugated steel pipe culvert bottom fill compaction device according to any one of claims 1 to 9 comprises the following steps: S1, moving the fill positioning unit (20) so that the fill positioning unit (20) contacts the side of the corrugated steel pipe culvert (50); S2, connecting the fill unit (30) to the fill positioning unit (20), and supporting the fill unit (30) with the fill support unit (10), so that a fill space is formed between the fill unit (30) and the corrugated steel pipe culvert (50); S3, filling the earthwork into the earth filling space obtained in step S2; S4, starting the fill compaction unit (40) to perform compaction; S5, determine whether the corrugated steel pipe culvert bottom fill compaction is completed, if so, end, if not, execute step S6; S6, adjusting the connection position of the filling unit (30) and the filling positioning unit (20) to increase the filling space; S7, filling the earthwork into the fill space added in step S6; S8, starting the fill compaction unit (40) to perform compaction; S9: Determine whether the corrugated steel pipe culvert bottom fill and compaction are completed. If yes, end; if not, execute step S6.

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