Backfill flowable solidified soil composition for expressways, backfill flowable solidified soil device, backfill device, and construction method

Abstract

A backfill fluidized solidified soil composition, backfill fluidized solidified soil device, backfilling device, and construction method for highways are disclosed. By weight, the composition comprises 69%-62% soil, 12.4%-4.2% cement, 5.2% fly ash, and 21.6%-20.4% water. Through the soil, cement, fly ash, and water, a slurry with self-compacting and self-leveling properties is achieved. This solves the technical problem of using sand and gravel materials and requiring backfilling in 15cm layers with compaction. Therefore, it improves the backfilling construction efficiency in highway abutments, culverts, foundation pits, trenches, and pipeline trenches.

Description

Technical Field

[0001] This invention relates to a backfill fluidized solidified soil composition, a backfill fluidized solidified soil device, a backfilling device, and a construction method, particularly a backfill fluidized solidified soil composition, a backfill fluidized solidified soil device, a backfilling device, and a construction method for highways. Background Technology

[0002] Backfilling in highway abutments, culverts, foundation pits, trenches, and pipe trenches is crucial to prevent backfilling that could lead to water seepage and bridge approach slab settlement, thus ensuring highway safety. Currently, backfilling in these areas still relies on sand and gravel, requiring 15cm layers of compaction. This process is difficult to guarantee in terms of compaction quality, resulting in low construction efficiency. There is currently no suitable fluidized bed material composition for highway backfilling that can achieve self-compacting and self-leveling during the backfilling process in these areas, thereby improving construction efficiency.

[0003] This invention, through its self-compacting and self-leveling technical features, effectively explores and studies the technical problems of using sand and gravel materials that require backfilling in 15cm layers and undergoing compaction.

[0004] The statements herein provide only background information related to this invention and do not necessarily constitute prior art. Based on the technical disclosure provided by the applicant on August 24, 2023, which addresses practical technical problems encountered during the work process, and through searching similar patent documents and existing technical problems, technical features, and technical effects in the background art, the technical solution of this invention is proposed. Summary of the Invention

[0005] The subject of this invention is a backfill fluidized solidified soil composition for highways.

[0006] The subject of this invention is a backfill fluidized solidification soil device for highways.

[0007] The subject of this invention is a backfilling device for highways.

[0008] The subject of this invention is a backfilling construction method for highways.

[0009] In order to overcome the above-mentioned technical shortcomings, the purpose of this invention is to provide a backfill fluidized solidified soil composition, a backfill fluidized solidified soil device, a backfilling device, and a construction method for highways, thereby improving the backfilling construction efficiency in highway abutments, culverts, foundation pits, trenches, and pipeline trenches.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is: a backfill fluidized solidified soil composition for highways, comprising, by weight: 69%-62% soil, 12.4%-4.2% cement, 5.2% fly ash and 21.6%-20.4% water.

[0011] By incorporating soil, cement, fly ash, and water, a self-compacting and self-leveling slurry is achieved. This solves the technical problem of backfilling in 15cm layers with compaction when using sand and gravel, thus improving the efficiency of backfilling construction in highway abutments, culverts, foundation pits, trenches, and pipeline trenches.

[0012] This invention designs an integrated system of soil, cement, fly ash, and water that features self-compacting and self-leveling properties.

[0013] The technical effect of the above two solutions is that they enable the use of cement and fly ash as solidifying agents to improve the properties of the soil.

[0014] The present invention is designed such that the particle diameter of the soil is set to be less than 5 cm and the moisture content of the soil is set to be less than 15%.

[0015] This invention designs a cement that is PO32.5 or PO42.5 ordinary Portland cement.

[0016] This invention designs fly ash into ultrafine fly ash.

[0017] The present invention designs a backfill fluidized solidified soil composition with a water-to-solid ratio of 0.33-0.37.

[0018] The present invention designs a backfill fluidized solidified soil composition with a slump of 220mm-240mm.

[0019] The technical effects of the above five technical solutions are as follows: they realize the optimization of the composition and parameters of the backfill fluidized solidified soil composition, thus expanding the technical effects of the present invention.

[0020] The present invention is designed to contain, by weight proportions: 69% soil, 4.2% cement, 5.2% fly ash and 21.6% water.

[0021] The technical effect of the above technical solution is that it realizes a suitable low-cost technical solution and enables its application in the backfill foundation of highways with a slope of less than 20 degrees.

[0022] The present invention is designed to contain, by weight proportions: 67% soil, 6.2% cement, 5.2% fly ash and 21.6% water.

[0023] The present invention is designed to contain, by weight proportions: 65% soil, 8.3% cement, 5.2% fly ash and 21.5% water.

[0024] The technical advantages of the two solutions are: they achieve a technical solution suitable for reducing the area of ​​the backfill foundation, and they can be applied to the backfill foundations of highways with slopes of 20-45 degrees.

[0025] The present invention is designed to contain, by weight proportions: 64% soil, 10.2% cement, 5.2% fly ash and 20.6% water.

[0026] The present invention is designed to contain, by weight proportions: 62% soil, 12.4% cement, 5.2% fly ash and 20.4% water.

[0027] The technical effects of the above two solutions are: they achieve a technical solution setting suitable for expanding the backfill foundation area, and they can be applied to the backfill foundation of highways with a slope greater than 45 degrees.

[0028] The present invention designs a backfill fluidized solidification soil device for highways, comprising a compacted layer and a backfill layer, wherein the backfill layer is provided on the compacted layer.

[0029] Because of the design of the compaction layer and the backfill layer, the compaction layer supports the backfill layer, and the backfill layer enables the self-forming of the backfill fluid solidified body in the backfill area of ​​the highway. Therefore, the backfill construction efficiency in the abutments, culverts, foundation pits, trenches and pipeline trenches of the highway is improved.

[0030] This invention designs a method to connect the compacted layer and the backfill layer by forming a self-flowing solidified backfill body in the backfill area of ​​a highway.

[0031] The technical effect of the above two technical solutions is that, through the compaction layer and the backfill layer, the basic technical solution of the present invention is formed, and the technical problem of the present invention is solved.

[0032] The present invention designs a compacted layer body for backfilling foundation, wherein the upper end face of the compacted layer is configured to be in contact with the backfill layer.

[0033] The technical effect of the above solution is that it ensures stable support for the backfill layer.

[0034] The present invention designs a backfill layer as an accumulation of a backfill fluidized solidified soil composition and sets the lower end face of the backfill layer as a contact connection with the compacted layer.

[0035] The technical effect of the above solution is that it enables layered backfilling on a backfilled foundation.

[0036] The present invention designs a backfill layer with a thickness of 0.3-1.0m.

[0037] The technical effect of the above solution is that it enables the construction of a single-stage thickness layer.

[0038] The present invention designs a backfill layer comprising an initial recirculation section and a subsequent leveling section, wherein the upper end face of the initial recirculation section is configured to be in contact with the lower end face of the subsequent leveling section, and the lower end face of the initial recirculation section is configured to be in contact with the compacted layer, wherein the initial recirculation section is configured as a positive stacking platform and the subsequent leveling section is configured as an inverted stacking platform.

[0039] The technical effect of the above solution is that it enables the backfill layer to be stacked using a platform, thereby improving the performance of self-compacting and self-leveling treatment.

[0040] The present invention is designed such that the compaction layer and the backfill layer are distributed in the manner of the top leveling layer.

[0041] The present invention designs a backfilling device for highways, comprising a retaining template set on the backfill foundation of the highway, a hopper for storing slurry of the backfill fluidized solidified soil composition, a backfilling column for releasing the slurry of the backfill fluidized solidified soil composition, and a mud pump set between the backfilling column and the hopper.

[0042] By designing hoppers, mud pumps, backfill columns, and retaining formwork, the backfill templates are formed, the hoppers are used to store the slurry of the backfill fluidized solidified soil composition on-site, and the mud pumps and backfill columns enable the self-forming of a backfill fluidized solidified body with a height of 0.3-1.0m at the backfill location on highways. Therefore, the backfilling construction efficiency in highway abutments, culverts, foundation pits, trenches, and pipeline trenches is improved.

[0043] This invention designs a method for interconnecting hoppers, mud pumps, backfill columns, and retaining formwork in a way that allows the self-forming backfill fluidized solidified body with a height of 0.3-1.0m at the backfill location on highways.

[0044] The technical effect of the above solution is that it enables the separate formation of the initial backflow section and the subsequent filling section, thereby improving the construction effect of the backfill layer.

[0045] The present invention is designed to include a first accessory device, which is disposed on the hopper, the mud pump and the backfill column. The first accessory device is configured to include a moving platform, a front support and a rear support.

[0046] The technical effect of the above technical solution is that it realizes the integrated installation of other components and expands the technical effect of the present invention.

[0047] The present invention is designed with a hopper, a front support and a rear support respectively set on a mobile platform, a mud pump set between the hopper and the mobile platform, a retaining template set between the front support and the rear support and the mobile platform, and a backfill column set between the mud pump and the mobile platform.

[0048] The technical effect of the above technical solution is that the basic technical solution of the present invention is formed by the mobile platform, hopper, mud pump, backfill column, front support, rear support and enclosure template, which solves the technical problem of the present invention.

[0049] The present invention designs a mobile pallet as a trailer with a receiving trough at the front of the upper end face of the mobile pallet. The receiving trough is connected to the backfill column, and the rear of the upper end face of the mobile pallet is connected to the hopper. The middle part of the upper end face of the mobile pallet is connected to the slurry pump and the rear support respectively, and the front part of the upper end face of the mobile pallet is connected to the front support and the enclosure template respectively. The receiving trough is a U-shaped trough.

[0050] The technical effect of the above solution is that it enables the mobile vehicle body to be supported.

[0051] The present invention designs a hopper as a box-shaped body with an open upper part and the lower end of the hopper is configured to be connected to a moving pallet, and the discharge pipe at the lower end of the hopper is configured to be connected to a mud pump.

[0052] The technical effect of the above solution is that it enables the temporary storage of the slurry of the backfill fluidized solidified soil composition.

[0053] The present invention designs a mud pump that is a single-acting mud pump with its lower end face connected to a moving platform, a pipe on the input port of the mud pump connected to a hopper, and a pipe on the output port of the mud pump connected to a backfill column.

[0054] The technical effect of the above solution is that it enables the powered transport of the slurry of the backfill fluidized solidified soil composition.

[0055] This invention designs a backfill column comprising a lower column, an upper column, a first ear plate, and a second ear plate. The upper column has a central hole and a discharge hole. The upper end face of the lower column is connected to the lower end face of the upper column, and one side of the upper end face of the upper column is connected to the first ear plate. The other side of the upper end face of the upper column is connected to the second ear plate. The central hole is connected to a pipe located at the output port of a mud pump. The first and second ear plates are connected to the retaining wall template via support beams. The lower end of the lower column is connected to a moving platform. The connection between the lower and upper column is provided... The lower and upper columns are respectively designed as conical rods for connection to the front support via ropes. The first and second ear plates are respectively designed as plates with through holes, and the through holes of the first and second ear plates are respectively designed to connect with the support beams located on the enclosure template. The central hole is a blind hole and the discharge hole is a hole. The inner port of the central hole is respectively designed to be connected to the inner port of the discharge hole, and the outer port of the central hole is located on the upper end face of the upper column. The outer port of the discharge hole is located on the peripheral side face of the upper column, and the discharge holes are arranged at intervals along the peripheral side face of the upper column.

[0056] The technical effect of the above solution is that it enables the re-collapse self-compacting and self-leveling treatment of the initial backflow section and the subsequent filling section, thereby improving the re-finishing effect of the backfill layer.

[0057] The present invention designs a front support and a rear support, which are respectively configured as plate-shaped bodies with an open groove on the upper end and a through hole in the middle. The lower end of the front support and the lower end of the rear support are respectively configured to be connected to a mobile vehicle platform. The through hole of the front support is configured to be connected to the backfill column by a binding rope. The front support and the rear support are respectively configured to be accommodatingly connected to the enclosure template.

[0058] The technical effect of the above solution is that it enables the use of a cargo box panel.

[0059] The present invention designs a fence template as a sheet-like body, which is placed between the mobile platform and the front and rear supports. The lower part of the fence template is configured to be in contact with the mobile platform, and the side parts of the fence template are configured to be in contact with the front and rear supports respectively. The upper end face of the fence template is configured to be in contact with the support beam located on the backfill column.

[0060] The technical effect of the above solution is that it realizes the template setting as the backfill layer.

[0061] The present invention designs a hopper, mud pump, enclosure template and backfill column that are distributed in the manner of intermediate release flow layer, and a hopper, mud pump, enclosure template and backfill column that are distributed in the manner of moving vehicle platform, front support and rear support.

[0062] The present invention is designed such that the center line of the mobile platform, the center line of the hopper, the center line of the front support, the center line of the rear support, and the center line of the enclosure template are set on the same straight line, at least two mud pumps are set between the hopper and the mobile platform, multiple enclosure templates are set between the mobile platform and the front and rear supports, and the lower column is set to be connected to the receiving tank.

[0063] This invention designs a backfill construction method for highways, the steps of which are: a backfill template is formed by a retaining wall template; a hopper is used to store the slurry of the backfill fluidized solidified soil composition on site; and a mud pump and backfill columns are used to spontaneously form a backfill fluidized solidified body at a height of 0.3-1.0m at the backfill location of the highway.

[0064] The technical effect of the above technical solution is that it highlights the technical feature of self-forming backfill fluid solidified body with a height of 0.3-1.0m in the backfill section of the highway, and introduces its application in the technical field of backfill construction methods for highways.

[0065] The present invention comprises the following steps: clearing debris from the backfill foundation of the highway, compacting the backfill foundation to obtain a compacted layer, removing the retaining formwork from between the mobile platform and the front and rear supports, installing the retaining formwork on the outer edge of the compacted layer to be backfilled, enclosing the backfill area with the retaining formwork, and mixing 69%-62% soil, 12.4%-4.2% cement, 5.2% fly ash, and 21.6%-20.4% water to prepare a backfill fluidized solidified soil composition slurry. The material is injected into the hopper as part of the backfill fluidized solidified soil composition. The backfill column is removed from the moving platform and front support. The support beam is installed in the through-hole of the first ear plate and the through-hole of the second ear plate. Along the long axis of the backfill area enclosed by the retaining template, the backfill column is placed in the backfill area enclosed by the retaining template. The ends of the support beams located in the through-holes of the first and second ear plates are placed on the upper end face of the retaining template. One of the pipes located at the output port of the mud pump is inserted into the central hole, so that one of the pipes located at the output port of the mud pump is in working condition. One of the mud pumps discharges the backfill fluidized solidified soil composition slurry from the discharge hole, forming a preliminary return section along the long axis of the backfill area enclosed by the retaining formwork. When the height of the preliminary return section reaches 0.62-0.68 times the height of the retaining formwork, one of the mud pumps is deactivated, and the pipe at the output port of one of the mud pumps is removed from the central hole. The pipe at the output port of the other mud pump is placed on the preliminary return section, and the other mud pump is activated to discharge the backfill fluidized solidified soil composition. The slurry is discharged from the pipe at the output port of another slurry pump to the later filling section. At the same time, the lower column is pulled out from the initial return section by the support beam. When the slurry of the backfill fluidized solidified soil composition in the backfill area enclosed by the retaining formwork is full, the other slurry pump is put into a non-working state. A plastic film is spread on the slurry of the backfill fluidized solidified soil composition in the backfill area to cure the slurry of the backfill fluidized solidified soil composition in the backfill area. When the curing strength is not less than the unconfined compressive strength at 7 days, the retaining formwork is removed.

[0066] The technical effect of the above solution is that it enables operation on the compacted layer and backfill layer, and optimizes the height parameters of the initial return section.

[0067] In this technical solution, the soil, cement, fly ash and water with self-compacting and self-leveling properties are important technical features. In the technical field of backfill fluidized solidified soil composition, backfill fluidized solidified soil device, backfill device and construction method for highways, it has novelty, inventiveness and practicality. The terminology in this technical solution can be explained and understood by the patent literature in this technical field. Attached Figure Description

[0068] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0069] Figure 1 This is a schematic diagram of a backfill fluidized solidification soil device for highways according to the present invention.

[0070] Figure 2 This is a schematic diagram of a backfilling device for highways according to the present invention.

[0071] Compacted layer-10, Backfill layer-20, Pre-return section-201, Post-filling section-202, Moving platform-3, Hopper-4, Mud pump-5, Backfill column-6, Front support-7, Rear support-8, Enclosure template-9, Receiving tank-31, Lower column section-61, Upper column section-62, First ear plate section-63, Second ear plate section-64, Central hole-65, Discharge hole-66. Implementation

[0072] According to the examination guidelines, terms such as “having,” “comprising,” and “including” used in this invention should be understood to mean without dispensing the presence or addition of one or more other elements or combinations thereof.

[0073] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0074] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0075] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following embodiments are commercially available. If the processing conditions are not explicitly stated, please refer to the product manual or follow the conventional methods in the field.

[0076] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0077] A backfill fluidized solidified soil composition for highways, the first embodiment of the present invention, is described in detail with reference to the accompanying drawings. By weight ratio, it contains 69%-62% soil, 12.4%-4.2% cement, 5.2% fly ash and 21.6%-20.4% water.

[0078] In this embodiment, the particle diameter of the soil is set to be less than 5 cm and the moisture content of the soil is set to be less than 15%.

[0079] In this embodiment, the cement is set as PO32.5 or PO42.5 ordinary Portland cement.

[0080] In this embodiment, the fly ash is set as ultrafine fly ash.

[0081] In this embodiment, the water-to-solid ratio of the backfill fluidized solidified soil composition is set to 0.33-0.37.

[0082] In this embodiment, the slump of the backfill fluidized solidified soil composition is set to 220mm-240mm.

[0083] One of the first embodiments of the present invention contains, by weight: 69% soil, 4.2% cement, 5.2% fly ash and 21.6% water.

[0084] In this embodiment, the unconfined compressive strength of the cylindrical test specimen with a diameter of 104 mm and a height of 200 mm is 0.69 MPa at 7 days and 1.30 MPa at 28 days.

[0085] The second embodiment of the first invention contains, by weight: 67% soil, 6.2% cement, 5.2% fly ash and 21.6% water.

[0086] In this embodiment, the unconfined compressive strength of the cylindrical test specimen with a diameter of 104 mm and a height of 200 mm is 1.03 MPa at 7 days and 1.88 MPa at 28 days.

[0087] The third embodiment of the present invention contains, by weight: 65% soil, 8.3% cement, 5.2% fly ash and 21.5% water.

[0088] In this embodiment, the unconfined compressive strength of the cylindrical test specimen with a diameter of 104 mm and a height of 200 mm at 7 days is 1.42 MPa, and the unconfined compressive strength at 28 days is 2.49 MPa.

[0089] The fourth embodiment of the present invention contains, by weight: 64% soil, 10.2% cement, 5.2% fly ash and 20.6% water.

[0090] In this embodiment, the unconfined compressive strength of the cylindrical test specimen with a diameter of 104 mm and a height of 200 mm is 2.52 MPa at 7 days and 4.19 MPa at 28 days.

[0091] The fifth first embodiment of the present invention contains, by weight: 62% soil, 12.4% cement, 5.2% fly ash and 20.4% water.

[0092] In this embodiment, the unconfined compressive strength of the cylindrical test specimen with a diameter of 104 mm and a height of 200 mm is 3.50 MPa at 7 days and 5.64 MPa at 28 days.

[0093] A device for backfilling fluidized solidified soil for highways. Figure 1 As one of the first embodiments of the present invention, this embodiment is described in detail with reference to the accompanying drawings. It includes a compacted layer 10 and a backfill layer 20, and the backfill layer 20 is provided on the compacted layer 10.

[0094] In this embodiment, the compacted layer 10 is configured as the compacted layer of the backfill foundation, and the upper end face of the compacted layer 10 is configured to be in contact with the backfill layer 20.

[0095] The compacted layer 10 forms a support connection point for the backfill layer 20. The compacted layer 10 connects with the backfill layer 20, and its technical purpose is to serve as a support carrier for the backfill layer 20.

[0096] In this embodiment, the backfill layer 20 is configured as an accumulation of backfill fluidized solidified soil composition and the lower end face of the backfill layer 20 is configured to be in contact with the compacted layer 10.

[0097] The backfill layer 20 forms a support connection point for the compacted layer 10. The backfill layer 20 achieves the connection with the compacted layer 10. Its technical purpose is to serve as the main component of the backfill fluidized solidified soil device.

[0098] In this embodiment, the thickness of the backfill layer 20 is set to 0.3-1.0m.

[0099] The technical objective is to increase the thickness of the backfill layer 20 in a single construction.

[0100] In this embodiment, the backfill layer 20 is configured to include a pre-return section 201 and a post-filling section 202, with the upper end face of the pre-return section 201 being connected in contact with the lower end face of the post-filling section 202, and the lower end face of the pre-return section 201 being connected in contact with the compacted layer 10. The pre-return section 201 is configured as a positive stacking platform and the post-filling section 202 is configured as an inverted stacking platform.

[0101] The technical objective is to enable two backfilling processes for the backfill layer 20.

[0102] In this embodiment, the compacted layer 10 and the backfill layer 20 are arranged in the manner of an upper leveling layer.

[0103] In one of the supporting examples of the first embodiment of the present invention, the thickness of the backfill layer 20 is set to 0.3m.

[0104] In a supporting example of one of the first embodiments of the present invention, the thickness of the backfill layer 20 is set to 1.0m.

[0105] In one of the first embodiments of the present invention, the thickness of the backfill layer 20 is set to 0.6m.

[0106] A backfilling device for highways. Figure 2 This is the first embodiment of the present invention. The embodiment is described in detail with reference to the accompanying drawings. It includes a mobile platform 3, a hopper 4, a mud pump 5, a backfill column 6, a front support 7, a rear support 8, and a retaining template 9. The hopper 4, the front support 7, and the rear support 8 are respectively arranged on the mobile platform 3. The mud pump 5 is arranged between the hopper 4 and the mobile platform 3. The retaining template 9 is arranged between the front support 7 and the rear support 8 and the mobile platform 3. The backfill column 6 is arranged between the mud pump 5 and the mobile platform 3.

[0107] In this embodiment, the mobile pallet 3 is configured as a trailer and a receiving trough 31 is provided on the front of the upper end face of the mobile pallet 3. The receiving trough 31 is configured to be connected to the backfill column 6 and the rear of the upper end face of the mobile pallet 3 is configured to be connected to the hopper 4. The middle part of the upper end face of the mobile pallet 3 is configured to be connected to the slurry pump 5 and the rear support 8 respectively, and the front part of the upper end face of the mobile pallet 3 is configured to be connected to the front support 7 and the enclosure template 9 respectively. The receiving trough 31 is configured as a U-shaped trough.

[0108] The movable platform 3 forms a support connection point for the hopper 4, mud pump 5, backfill column 6, front support 7, rear support 8, and enclosure template 9. The movable platform 3 connects to the hopper 4, mud pump 5, front support 7, rear support 8, and enclosure template 9. The receiving tank 31 connects to the backfill column 6. Its technical purpose is to serve as a support carrier for the hopper 4, mud pump 5, backfill column 6, front support 7, rear support 8, and enclosure template 9.

[0109] In this embodiment, the hopper 4 is configured as a box-shaped body with an open upper part and the lower end of the hopper 4 is configured to be connected to the moving pallet 3, and the discharge pipe at the lower end of the hopper 4 is configured to be connected to the mud pump 5.

[0110] The hopper 4 forms a support connection point for the mobile pallet 3 and the mud pump 5. The hopper 4 connects to the mobile pallet 3 and the mud pump 5. Its technical purpose is to serve as a component for storing slurry of backfill fluidized solidified soil composition.

[0111] In this embodiment, the mud pump 5 is configured as a single-acting mud pump, and the lower end face of the mud pump 5 is configured to be connected to the moving pallet 3. The pipe located at the input port of the mud pump 5 is configured to be connected to the hopper 4 in a communicating manner, and the pipe located at the output port of the mud pump 5 is configured to be connected to the backfill column 6 in a submerged manner.

[0112] The mud pump 5 forms a support connection point for the mobile platform 3, the hopper 4, and the backfill column 6. The mud pump 5 realizes the connection with the mobile platform 3, the connection with the hopper 4, and the connection with the backfill column 6. Its technical purpose is to be used as a component to transport the slurry of the backfill fluidized solidified soil composition to the backfill column 6.

[0113] In this embodiment, the backfill column 6 is configured to include a lower column portion 61, an upper column portion 62, a first ear plate portion 63, and a second ear plate portion 64. A central hole 65 and a discharge hole 66 are respectively provided on the upper column portion 62. The upper end face of the lower column portion 61 is connected to the lower end face of the upper column portion 62, and one side of the upper end face of the upper column portion 62 is connected to the first ear plate portion 63. The other side of the upper end face of the upper column portion 62 is connected to the second ear plate portion 64. The central hole 65 is connected to a pipe located at the output port of the mud pump 5. The first ear plate portion 63 and the second ear plate portion 64 are respectively connected to the retaining template 9 via support beams. The lower end of the lower column portion 61 is connected to the moving platform 3. The connection between the lower column portion 61 and the upper column portion 62... The connecting part is configured to be connected to the front bracket 7 by a binding rope, and the lower column part 61 and the upper column part 62 are respectively configured as conical rods. The first ear plate part 63 and the second ear plate part 64 are respectively configured as sheet-like bodies with through holes, and the through holes of the first ear plate part 63 and the second ear plate part 64 are respectively configured to be connected to the support beam located on the enclosure template 9. The central hole 65 is configured as a blind hole and the discharge hole 66 is configured as a hole. The inner port of the central hole 65 is configured to be connected to the inner port of the discharge hole 66, and the outer port of the central hole 65 is located on the upper end face of the upper column part 62. The outer port of the discharge hole 66 is located on the peripheral side face of the upper column part 62, and the discharge holes 66 are arranged at intervals along the peripheral side face of the upper column part 62.

[0114] The backfill column 6 forms a support connection point for the mobile platform 3, the mud pump 5, the front support 7, and the enclosure template 9. The lower column 61 connects to the mobile platform 3, the central hole 65 connects to the mud pump 5, the lower column 61 and the upper column 62 connect to the front support 7, the first ear plate 63 and the second ear plate 64 connect to the enclosure template 9, and the discharge hole 66 discharges the slurry of the backfill fluidized solidified soil composition. Its technical purpose is to serve as a component for releasing the slurry of the backfill fluidized solidified soil composition into the backfill area composed of the enclosure template 9.

[0115] In this embodiment, the front support 7 and the rear support 8 are respectively configured as plate-shaped bodies with an open groove on the upper end face and a through hole in the middle part. The lower end face of the front support 7 and the lower end face of the rear support 8 are respectively configured to be connected to the mobile pallet 3. The through hole of the front support 7 is configured to be connected to the backfill column 6 by a binding rope. The front support 7 and the rear support 8 are respectively configured to be accommodatingly connected to the enclosure template 9.

[0116] The front bracket 7 and the rear bracket 8 form a support connection point for the mobile platform 3, the backfill column 6 and the enclosure template 9. The front bracket 7 and the rear bracket 8 realize the connection with the mobile platform 3, the connection with the enclosure template 9, and the connection with the backfill column 6. The technical purpose is to serve as a component for fixing and supporting the backfill column 6 and the enclosure template 9.

[0117] In this embodiment, the enclosure template 9 is a sheet-like body and is disposed between the mobile platform 3 and the front support 7 and the rear support 8. The lower part of the enclosure template 9 is configured to be in contact with the mobile platform 3, and the side parts of the enclosure template 9 are configured to be in contact with the front support 7 and the rear support 8, respectively. The upper end face of the enclosure template 9 is configured to be in contact with the support beam located on the backfill column 6.

[0118] The enclosure template 9 forms a support connection point for the mobile vehicle platform 3, backfill column 6, front support 7 and rear support 8. The enclosure template 9 realizes the connection with the mobile vehicle platform 3, the backfill column 6, the front support 7 and the rear support 8. Its technical purpose is to be used as a component for installing templates on the backfill foundation of highways.

[0119] In this embodiment, the hopper 4, mud pump 5, and enclosure template 9 are arranged with the backfill column 6 in the manner of intermediate release flow layer, and the hopper 4, mud pump 5, enclosure template 9, and backfill column 6 are arranged with the moving platform 3, front support 7, and rear support 8 in the manner of moving carrier. The center line of the moving platform 3, the center line of the hopper 4, the center line of the front support 7, the center line of the rear support 8, and the center line of the enclosure template 9 are arranged on the same straight line. At least two mud pumps 5 are arranged between the hopper 4 and the moving platform 3, and multiple enclosure templates 9 are arranged between the moving platform 3 and the front support 7 and the rear support 8. The lower column 61 is arranged to be connected to the receiving tank 31.

[0120] The present invention will be further described below with reference to embodiments. These embodiments are intended to illustrate the present invention and not to further limit the present invention.

[0121] A backfilling construction method for highways, in its first embodiment, comprises the following steps: clearing debris from the backfill foundation of the highway; compacting the backfill foundation to obtain a compacted layer 10; removing the retaining formwork 9 from between the mobile platform 3 and the front support 7 and rear support 8; installing the retaining formwork 9 on the outer edge of the compacted layer 10 to be backfilled; and enclosing the backfilling area by the retaining formwork 9.

[0122] Mix 69%-62% soil, 12.4%-4.2% cement, 5.2% fly ash, and 21.6%-20.4% water to prepare a backfill fluidized solidified soil composition slurry. Inject the slurry into the hopper 4. Remove the backfill column 6 from the moving platform 3 and the front support 7. Install the support beam in the through-hole of the first ear plate 63 and the through-hole of the second ear plate 64. Place the backfill column 6 along the long axis of the backfill area enclosed by the retaining template 9. Within the backfill area enclosed by the retaining template 9, the ends of the support beams located in the through holes of the first ear plate portion 63 and the second ear plate portion 64 are placed on the upper end face of the retaining template 9. One of the pipes located at the output port of the mud pump 5 is inserted into the central hole 65, putting the mud pump 5 into operation. The mud pump 5 discharges the backfill fluidized solidified soil composition slurry from the discharge hole 66, creating a preliminary return section 201 along the long axis of the backfill area enclosed by the retaining template 9. This process continues until the initial return section... When the height of the pre-return section 201 is 0.62-0.68 times the height of the retaining formwork 9, one of the mud pumps 5 is in a non-working state. The pipe at the output port of one of the mud pumps 5 is removed from the central hole 65. The pipe at the output port of the other mud pump 5 is placed on the pre-return section 201, putting the other mud pump 5 in a working state. The slurry of the backfill fluidized solidified soil composition is discharged from the pipe at the output port of the other mud pump 5. The filling section 202 is filled in, and the lower column section 61 is pulled out from the initial return section 201 through the support beam. When the slurry of the backfill fluidized solidified soil composition in the backfill area enclosed by the retaining template 9 is full, the other one of the mud pumps 5 is put into a non-working state. The plastic film is spread on the slurry of the backfill fluidized solidified soil composition in the backfill area to cure the slurry of the backfill fluidized solidified soil composition in the backfill area. When the curing strength is not less than the unconfined compressive strength at 7 days, the retaining template 9 is removed.

[0123] One supporting example of the first embodiment of the present invention involves the following steps: mixing 69% soil, 4.2% cement, 5.2% fly ash, and 21.6% water to prepare a slurry for backfilling fluidized solidified soil composition; injecting the slurry into the hopper 4; removing the backfill column 6 from the moving platform 3 and the front support 7; installing the support beam in the through-hole of the first ear plate 63 and the through-hole of the second ear plate 64; and placing the backfill column 6 along the long axis of the backfill area enclosed by the retaining template 9. In the backfill area enclosed by the retaining formwork 9, the ends of the support beams located in the through holes of the first ear plate portion 63 and the second ear plate portion 64 are placed on the upper end face of the retaining formwork 9. One of the pipes located at the output port of the mud pump 5 is inserted into the central hole 65, so that one of the mud pumps 5 is in working condition. The slurry of the backfill fluidized solidified soil composition is discharged from the discharge hole 66 by one of the mud pumps 5, and the preliminary return section 2 is obtained on the long axis of the backfill area enclosed by the retaining formwork 9. 01. When the height of the initial return section 201 is 0.62 times the height of the retaining formwork 9, one of the mud pumps 5 is deactivated. The pipe at the output port of one of the mud pumps 5 is removed from the central hole 65. The pipe at the output port of the other mud pump 5 is placed on the initial return section 201, activating the other mud pump 5. The slurry of the backfill fluidized solidified soil composition is discharged from the pipe at the output port of the other mud pump 5. The filling section 202 is filled in, and the lower column section 61 is pulled out from the initial return section 201 through the support beam. When the slurry of the backfill fluidized solidified soil composition in the backfill area enclosed by the retaining template 9 is full, the other one of the mud pumps 5 is put into a non-working state. The plastic film is spread on the slurry of the backfill fluidized solidified soil composition in the backfill area to cure the slurry of the backfill fluidized solidified soil composition in the backfill area. When the curing strength is not less than the unconfined compressive strength at 7 days, the retaining template 9 is removed.

[0124] The second supporting example of the first embodiment of the present invention involves the following steps: mixing 67% soil, 6.2% cement, 5.2% fly ash, and 21.6% water to prepare a slurry for backfilling fluidized solidified soil composition; injecting the slurry into the hopper 4; removing the backfill column 6 from the moving platform 3 and the front support 7; installing the support beam in the through-hole of the first ear plate 63 and the through-hole of the second ear plate 64; and placing the backfill column 6 along the long axis of the backfill area enclosed by the retaining template 9. In the backfill area enclosed by the retaining formwork 9, the ends of the support beams located in the through holes of the first ear plate portion 63 and the second ear plate portion 64 are placed on the upper end face of the retaining formwork 9. One of the pipes located at the output port of the mud pump 5 is inserted into the central hole 65, so that one of the mud pumps 5 is in working condition. The slurry of the backfill fluidized solidified soil composition is discharged from the discharge hole 66 by one of the mud pumps 5, and the preliminary return section 2 is obtained on the long axis of the backfill area enclosed by the retaining formwork 9. 01. When the height of the initial return section 201 is 0.68 times the height of the retaining formwork 9, one of the mud pumps 5 is deactivated. The pipe at the output port of one of the mud pumps 5 is removed from the central hole 65. The pipe at the output port of the other mud pump 5 is placed on the initial return section 201, activating the other mud pump 5. The slurry of the backfill fluidized solidified soil composition is discharged from the pipe at the output port of the other mud pump 5. The filling section 202 is filled in, and the lower column section 61 is pulled out from the initial return section 201 through the support beam. When the slurry of the backfill fluidized solidified soil composition in the backfill area enclosed by the retaining template 9 is full, the other one of the mud pumps 5 is put into a non-working state. The plastic film is spread on the slurry of the backfill fluidized solidified soil composition in the backfill area to cure the slurry of the backfill fluidized solidified soil composition in the backfill area. When the curing strength is not less than the unconfined compressive strength at 7 days, the retaining template 9 is removed.

[0125] The third supporting example of the first embodiment of the present invention involves the following steps: mixing 65% soil, 8.3% cement, 5.2% fly ash, and 21.5% water to prepare a slurry for backfilling fluidized solidified soil composition; injecting the slurry into the hopper 4; removing the backfill column 6 from the moving platform 3 and the front support 7; installing the support beam in the through-hole of the first ear plate 63 and the through-hole of the second ear plate 64; and placing the backfill column 6 along the long axis of the backfill area enclosed by the retaining template 9. In the backfill area enclosed by the retaining formwork 9, the ends of the support beams located in the through holes of the first ear plate portion 63 and the second ear plate portion 64 are placed on the upper end face of the retaining formwork 9. One of the pipes located at the output port of the mud pump 5 is inserted into the central hole 65, so that one of the mud pumps 5 is in working condition. The slurry of the backfill fluidized solidified soil composition is discharged from the discharge hole 66 by one of the mud pumps 5, and the preliminary return section 2 is obtained on the long axis of the backfill area enclosed by the retaining formwork 9. 01. When the height of the initial return section 201 is 0.65 times the height of the retaining formwork 9, one of the mud pumps 5 is deactivated. The pipe at the output port of one of the mud pumps 5 is removed from the central hole 65. The pipe at the output port of the other mud pump 5 is placed on the initial return section 201, activating the other mud pump 5. The slurry of the backfill fluidized solidified soil composition is discharged from the pipe at the output port of the other mud pump 5. The filling section 202 is filled in, and the lower column section 61 is pulled out from the initial return section 201 through the support beam. When the slurry of the backfill fluidized solidified soil composition in the backfill area enclosed by the retaining template 9 is full, the other one of the mud pumps 5 is put into a non-working state. The plastic film is spread on the slurry of the backfill fluidized solidified soil composition in the backfill area to cure the slurry of the backfill fluidized solidified soil composition in the backfill area. When the curing strength is not less than the unconfined compressive strength at 7 days, the retaining template 9 is removed.

[0126] The fourth supporting example of the first embodiment of the present invention involves the following steps: mixing 64% soil, 10.2% cement, 5.2% fly ash, and 20.6% water to prepare a slurry for backfilling fluidized solidified soil composition; injecting the slurry into the hopper 4; removing the backfill column 6 from the moving platform 3 and the front support 7; installing the support beam in the through-hole of the first ear plate 63 and the through-hole of the second ear plate 64; and placing the backfill column 6 along the long axis of the backfill area enclosed by the retaining template 9. In the backfill area enclosed by the retaining formwork 9, the ends of the support beams located in the through holes of the first ear plate portion 63 and the second ear plate portion 64 are placed on the upper end face of the retaining formwork 9. One of the pipes located at the output port of the mud pump 5 is inserted into the central hole 65, so that one of the mud pumps 5 is in working condition. The slurry of the backfill fluidized solidified soil composition is discharged from the discharge hole 66 by one of the mud pumps 5, and the preliminary return section 2 is obtained on the long axis of the backfill area enclosed by the retaining formwork 9. 01. When the height of the initial return section 201 is 0.64 times the height of the retaining formwork 9, one of the mud pumps 5 is deactivated. The pipe at the output port of one of the mud pumps 5 is removed from the central hole 65. The pipe at the output port of the other mud pump 5 is placed on the initial return section 201, activating the other mud pump 5. The slurry of the backfill fluidized solidified soil composition is discharged from the pipe at the output port of the other mud pump 5. The filling section 202 is filled in, and the lower column section 61 is pulled out from the initial return section 201 through the support beam. When the slurry of the backfill fluidized solidified soil composition in the backfill area enclosed by the retaining template 9 is full, the other one of the mud pumps 5 is put into a non-working state. The plastic film is spread on the slurry of the backfill fluidized solidified soil composition in the backfill area to cure the slurry of the backfill fluidized solidified soil composition in the backfill area. When the curing strength is not less than the unconfined compressive strength at 7 days, the retaining template 9 is removed.

[0127] The fifth supporting example of the first embodiment of the present invention involves the following steps: mixing 62% soil, 12.4% cement, 5.2% fly ash, and 20.4% water to prepare a slurry for backfilling fluidized solidified soil composition; injecting the slurry into the hopper 4; removing the backfill column 6 from the moving platform 3 and the front support 7; installing the support beam in the through-hole of the first ear plate 63 and the through-hole of the second ear plate 64; and placing the backfill column 6 along the long axis of the backfill area enclosed by the retaining template 9. In the backfill area enclosed by the retaining formwork 9, the ends of the support beams located in the through holes of the first ear plate portion 63 and the second ear plate portion 64 are placed on the upper end face of the retaining formwork 9. One of the pipes located at the output port of the mud pump 5 is inserted into the central hole 65, so that one of the mud pumps 5 is in working condition. The slurry of the backfill fluidized solidified soil composition is discharged from the discharge hole 66 by one of the mud pumps 5, and the preliminary return section 2 is obtained on the long axis of the backfill area enclosed by the retaining formwork 9. 01. When the height of the initial return section 201 is 0.67 times the height of the retaining formwork 9, one of the mud pumps 5 is deactivated. The pipe at the output port of one of the mud pumps 5 is removed from the central hole 65. The pipe at the output port of the other mud pump 5 is placed on the initial return section 201, activating the other mud pump 5. The slurry of the backfill fluidized solidified soil composition is discharged from the pipe at the output port of the other mud pump 5. The filling section 202 is filled in, and the lower column section 61 is pulled out from the initial return section 201 through the support beam. When the slurry of the backfill fluidized solidified soil composition in the backfill area enclosed by the retaining template 9 is full, the other one of the mud pumps 5 is put into a non-working state. The plastic film is spread on the slurry of the backfill fluidized solidified soil composition in the backfill area to cure the slurry of the backfill fluidized solidified soil composition in the backfill area. When the curing strength is not less than the unconfined compressive strength at 7 days, the retaining template 9 is removed.

[0128] In verifying this invention, the inventors abandoned the existing technical features of using sand and gravel and requiring backfilling in 15cm layers and compaction. They first proposed a technical feature with self-compacting and self-leveling treatment, resulting in the first unexpected technical effect: optimizing and improving the performance of the combination of soil, cement and fly ash. The second unexpected technical effect: specifically setting the water content improved the slurry performance of the backfill fluidized solidified soil composition. The third unexpected technical effect: increasing the contact surface area between the initial backflow section 201 and the subsequent leveling section 202, thereby increasing the area for self-compacting and self-leveling treatment. The fourth unexpected technical effect: achieving re-self-compacting and self-leveling treatment through the collapsed pore body. The fifth unexpected technical effect: expanding the application on backfill foundations with different slopes.

[0129] In a second embodiment of the present invention, soil, cement, fly ash and water are integrated according to the technical features of self-compacting and self-leveling treatment.

[0130] The second embodiment of the present invention is based on the first embodiment.

[0131] In a second embodiment of the present invention, the compacted layer 10 and the backfill layer 20 are connected to each other in a manner that allows the backfill portion of the highway to spontaneously form a backfill fluid solidified body.

[0132] The second embodiment of the present invention is based on the first embodiment.

[0133] In the second embodiment of the present invention, the present invention designs a method in which the hopper 4, mud pump 5, backfill column 6 and retaining template 9 are interconnected in a way that forms a self-forming backfill fluid solidified body with a height of 0.3-1.0m at the backfill location of the highway.

[0134] In this embodiment, a first accessory device is also included and is disposed on the hopper 4, the mud pump 5 and the backfill column 6. The first accessory device is configured to include a moving platform 3, a front support 7 and a rear support 8.

[0135] The second embodiment of the present invention is based on the first embodiment.

[0136] In the second embodiment of the present invention, the steps are as follows: the backfill template is formed by the enclosure template 9, the hopper 4 is used to store the slurry of the backfill fluidized solidified soil composition on site, and the mud pump 5 and the backfill column 6 are used to form a backfill fluidized solidified body with a height of 0.3-1.0m at the backfill location of the highway.

[0137] The second embodiment of the present invention is based on the first embodiment.

[0138] This invention has the following characteristics:

[0139] 1. By incorporating soil, cement, fly ash, and water, a self-compacting and self-leveling slurry is achieved. This solves the technical problem of using sand and gravel materials and requiring backfilling in 15cm layers with compaction. Therefore, it improves the backfilling efficiency in highway abutments, culverts, foundation pits, trenches, and pipeline trenches.

[0140] 2. Due to the design of the compacted layer 10 and the backfill layer 20, the compacted layer 10 supports the backfill layer 20, and the backfill layer 20 enables the self-forming of the backfill fluid solidified body in the backfill area of ​​the highway, thus improving the backfill construction efficiency in the abutments, culverts, foundation pits, trenches and pipeline trenches of the highway.

[0141] 3. Due to the design of hopper 4, mud pump 5, backfill column 6 and retaining formwork 9, the backfill formwork 9 is used to form the backfill template, the hopper 4 is used to store the slurry of the backfill fluidized solidified soil composition on site, and the mud pump 5 and backfill column 6 are used to form a self-forming backfill fluidized solidified body with a height of 0.3-1.0m at the backfill location of the highway. Therefore, the backfill construction efficiency in the abutments, culverts, foundation pits, trenches and pipeline trenches of the highway is improved.

[0142] 4. Due to the design of the mobile platform 3, front support 7 and rear support 8, the hopper 4, mud pump 5, backfill column 6 and enclosure formwork 9 are supported on the vehicle.

[0143] 5. Because the design limits the numerical range of the structural shape, the numerical range is a technical feature in the technical solution of this invention, and is not a technical feature obtained by formula calculation or a limited number of experiments. The experiment shows that the technical feature of the numerical range has achieved very good technical effect.

[0144] 6. Due to the design of the technical features of this invention, and the combined effect of the individual and collective technical features, experiments have shown that the performance indicators of this invention are at least 1.7 times that of existing performance indicators, and the invention has been evaluated to have good market value.

[0145] Other technical features that are the same as or similar to those of soil, cement, fly ash, and water with self-compacting and self-leveling properties are also embodiments of the present invention. Furthermore, the technical features of the embodiments described above can be combined in any way. In order to meet the requirements of the Patent Law, the Implementing Regulations of the Patent Law, and the Examination Guidelines, embodiments of all possible combinations of the technical features in the above embodiments will no longer be described.

[0146] The above embodiments are merely one implementation of the fluidized solidified soil composition, fluidized solidified soil backfilling device, backfilling device, and construction method for highways provided by the present invention. Other modifications to the solutions provided by the present invention, additions or reductions of components or steps, or application of the present invention to other technical fields similar to the present invention, all fall within the protection scope of the present invention.

Claims

1. A backfilling device for a highway, characterized in that: It includes a retaining formwork (9) set on the backfill foundation of the highway, a hopper (4) for storing the slurry of the backfill fluidized solidified soil composition, a backfill column (6) for releasing the slurry of the backfill fluidized solidified soil composition, and a mud pump (5) set between the backfill column (6) and the hopper (4). It also includes a first accessory device and the first accessory device is disposed on the hopper (4), the mud pump (5) and the backfill column (6). The first accessory device is configured to include a moving platform (3), a front support (7) and a rear support (8). A hopper (4), a front support (7), and a rear support (8) are respectively installed on the mobile platform (3). A mud pump (5) is installed between the hopper (4) and the mobile platform (3), and a retaining template (9) is installed between the front support (7) and the rear support (8) and the mobile platform (3). A backfill column (6) is installed between the mud pump (5) and the mobile platform (3). The mobile platform (3) is configured as a trailer and has a receiving trough (31) at the front of its upper end face. The receiving trough (31) is configured to be connected to the backfill column (6), and the rear of the upper end face of the mobile platform (3) is configured to be connected to the hopper (4). The middle part of the upper end face of the mobile platform (3) is configured to be connected to the slurry pump (5) and the rear support (8), and the front part of the upper end face of the mobile platform (3) is configured to be connected to the front support (7) and the enclosure template (9). The receiving trough (31) is configured as a U-shaped trough. The hopper (4) is configured as a box-shaped body with an open upper part and the lower end of the hopper (4) is configured to be connected to the moving plate (3). The discharge pipe at the lower end of the hopper (4) is configured to be connected to the mud pump (5). The mud pump (5) is configured as a single-acting mud pump and the lower end of the mud pump (5) is configured to be connected to the moving platform (3). The pipe on the input port of the mud pump (5) is configured to be connected to the hopper (4) and the pipe on the output port of the mud pump (5) is configured to be connected to the backfill column (6) by submersion. The backfill column (6) is configured to include a lower column (61), an upper column (62), a first ear plate (63), and a second ear plate (64). A central hole (65) and a discharge hole (66) are respectively provided on the upper column (62). The upper end face of the lower column (61) is connected to the lower end face of the upper column (62), and one side of the upper end face of the upper column (62) is connected to the first ear plate (63). The other side of the upper end face of the upper column (62) is connected to the second ear plate (64). The central hole (65) is connected to a pipe located at the output port of the mud pump (5). The first ear plate (63) and the second ear plate (64) are respectively connected to the retaining wall template (9) via support beams. The lower end of the lower column (61) is connected to the moving platform (3). The lower column (61) and the upper column (62)... The connecting part is configured to be connected to the front bracket (7) by a binding rope, and the lower column part (61) and the upper column part (62) are respectively configured as conical rods. The first ear plate part (63) and the second ear plate part (64) are respectively configured as plates with through holes. The through holes of the first ear plate part (63) and the through holes of the second ear plate part (64) are respectively configured to be connected to the support beam located on the enclosure template (9). The central hole (65) is configured as a blind hole and the discharge hole (66) is configured as a hole. The inner port of the central hole (65) is respectively configured to be connected to the inner port of the discharge hole (66). The outer port of the central hole (65) is located on the upper end face of the upper column part (62). The outer port of the discharge hole (66) is located on the peripheral side face of the upper column part (62). The discharge holes (66) are arranged at intervals along the peripheral side face of the upper column part (62). The front support (7) and the rear support (8) are respectively configured as plate-shaped bodies with an open groove on the upper end face and a through hole in the middle part. The lower end face of the front support (7) and the lower end face of the rear support (8) are respectively configured to be connected to the mobile vehicle platform (3). The through hole of the front support (7) is configured to be connected to the backfill column (6) by a binding rope. The front support (7) and the rear support (8) are respectively configured to be connected to the enclosure template (9) in an accommodating manner. The enclosure template (9) is a sheet-like body and is positioned between the mobile platform (3) and the front support (7) and the rear support (8). The lower part of the enclosure template (9) is designed to be in contact with the mobile platform (3), and the side parts of the enclosure template (9) are designed to be in contact with the front support (7) and the rear support (8), respectively. The upper end face of the enclosure template (9) is designed to be in contact with the support beam located on the backfill column (6). The mud pump (5) and backfill column (6) enable the self-forming backfill fluid solidification body with a height of 0.3-1.0m at the backfill location of the highway. The backfilled fluidized solidified soil includes a compacted layer (10) and a backfill layer (20), and the backfill layer (20) is provided on the compacted layer (10). The compacted layer (10) is set as the compacted layer of the backfill foundation, and the upper end face of the compacted layer (10) is set to be in contact with the backfill layer (20). The backfill layer (20) is configured as an accumulation of a backfill fluidized solidified soil composition, and the lower end face of the backfill layer (20) is configured to be in contact with the compacted layer (10). The thickness of the backfill layer (20) is set to 0.3-1.0m. The backfill layer (20) is configured to include a pre-return section (201) and a post-fill section (202), and the upper end face of the pre-return section (201) is configured to be in contact with the lower end face of the post-fill section (202), and the lower end face of the pre-return section (201) is configured to be in contact with the compacted layer (10). The pre-return section (201) is configured as a positive stacking platform and the post-fill section (202) is configured as an inverted stacking platform.

2. Backfilling device for motorways according to claim 1, characterized in that: The hopper (4), mud pump (5), backfill column (6), and retaining template (9) are interconnected in a way that forms a self-flowing solidified backfill at a height of 0.3-1.0m at the backfill location of the highway.

3. Backfilling device for motorways according to claim 2, characterized by the fact that the bin The bucket (4), mud pump (5), and enclosure template (9) and backfill column (6) are arranged in the manner of intermediate release flow layer and the bucket (4), mud pump (5), enclosure template (9), and backfill column (6) are arranged in the manner of moving vehicle plate (3), front support (7) and rear support (8) as moving carrier.

4. Backfilling device for motorways according to claim 3, characterized in that: The center lines of the mobile platform (3), the hopper (4), the front support (7), the rear support (8), and the enclosure template (9) are set on the same straight line. At least two mud pumps (5) are set between the hopper (4) and the mobile platform (3). Multiple enclosure templates (9) are set between the mobile platform (3) and the front support (7) and the rear support (8). The lower column (61) is set to be connected to the receiving tank (31).

5. A backfilling construction method for a backfilling device for highways according to claim 4, comprising the following steps: forming a backfilling template by means of a retaining template (9), and storing the slurry of the backfilling fluidized solidified soil composition on site by means of a hopper (4).

6. The backfill construction method of claim 5, wherein the steps are: Debris was cleared from the backfill foundation of the highway, and the backfill foundation of the highway was compacted to obtain a compacted layer (10) on the backfill foundation of the highway. The enclosure template (9) was removed from between the mobile platform (3) and the front support (7) and the rear support (8). The enclosure template (9) was installed on the outer edge of the compacted layer (10) to be backfilled. The backfill area was enclosed by the enclosure template (9). 69%-62% of soil, 12.4%-4.2% of cement, 5.2% of fly ash and 21.6%-20.4% of water were mixed to prepare the slurry of the backfill fluidized solidified soil composition. The slurry of the backfill fluidized solidified soil composition was injected into the hopper. In step (4), the backfill column (6) is removed from the moving platform (3) and the front bracket (7). The support beam is installed in the through hole of the first ear plate (63) and the through hole of the second ear plate (64). Along the long axis of the backfill area enclosed by the retaining template (9), the backfill column (6) is placed in the backfill area enclosed by the retaining template (9). The ends of the support beams located in the through holes of the first ear plate (63) and the second ear plate (64) are placed on the upper end face of the retaining template (9). One of the pipes located on the output port of the mud pump (5) is inserted into the central hole (65), so that one of the pipes located on the mud pump (5) is in working condition. A slurry pump (5) discharges the backfill fluidized solidified soil composition slurry from the discharge hole (66), forming a preliminary return section (201) along the long axis of the backfill area enclosed by the retaining template (9). When the height of the preliminary return section (201) is 0.62-0.68 times the height of the retaining template (9), one of the slurry pumps (5) is deactivated, and the pipe on the output port of one of the slurry pumps (5) is removed from the central hole (65). The pipe on the output port of the other slurry pump (5) is placed on the preliminary return section (201), and the other slurry pump (5) is activated. The backfill material is then discharged from the discharge hole (66) by the slurry pump (5). The slurry of the fluidized solidified soil composition is discharged from the pipe at the output port of another mud pump (5) to the later filling section (202). At the same time, the lower column section (61) is pulled out from the initial return section (201) by the support beam. When the slurry of the backfill fluidized solidified soil composition in the backfill area enclosed by the retaining template (9) is full, the other one located at the mud pump (5) is put into a non-working state. A plastic film is spread on the slurry of the backfill fluidized solidified soil composition in the backfill area to cure the slurry of the backfill fluidized solidified soil composition in the backfill area. When the curing strength is not less than the unconfined compressive strength at 7 days, the retaining template (9) is removed.

7. The backfill construction method of claim 6, wherein: The compacted layer (10) and the backfill layer (20) are connected to each other in a way that allows the backfill portion of the highway to form a self-flowing solidified backfill.

8. The backfill construction method of claim 6, wherein: The compacted layer (10) and the backfill layer (20) are arranged in the same manner as the top leveling layer.

9. The backfilling construction method according to claim 6, characterized in that: The backfill fluidized solidified soil composition is set according to the following weight ratios: 69%-62% soil, 12.4%-4.2% cement, 5.2% fly ash, and 21.6%-20.4% water. The soil particle diameter is set to less than 5 cm and the soil moisture content is set to less than 15%. The cement is set as PO32.5 or PO42.5 ordinary Portland cement. The fly ash is set as ultrafine fly ash. The water-to-solid ratio of the backfill fluidized solidified soil composition was set to 0.33-0.

37. The slump of the backfill fluidized solidified soil composition is set to 220mm-240mm.

10. The backfill construction method of claim 6, wherein: The soil, cement, fly ash, and water are integrated according to the technical characteristics of self-compacting and self-leveling treatment.

11. The backfilling construction method according to claim 6, characterized in that: The backfill fluidized solidified soil composition is set according to the following weight ratios: 69% soil, 4.2% cement, 5.2% fly ash and 21.6% water.

12. The backfill construction method of claim 6, wherein: The backfill fluidized solidified soil composition is set according to the following weight ratios: 67% soil, 6.2% cement, 5.2% fly ash and 21.6% water.

13. The backfill construction method of claim 6, wherein: The backfill fluidized solidified soil composition is set according to the following weight ratios: 65% soil, 8.3% cement, 5.2% fly ash and 21.5% water.

14. The backfill construction method of claim 6, wherein: The backfill fluidized solidified soil composition is set according to the following weight ratios: 64% soil, 10.2% cement, 5.2% fly ash and 20.6% water.

15. The backfill construction method of claim 6, wherein: The backfill fluidized solidified soil composition is set according to the following weight ratios: 62% soil, 12.4% cement, 5.2% fly ash and 20.4% water.

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