Replacing and filling device suitable for slope-free embankment construction and construction method of replacing and filling device

Abstract

The invention discloses a replacing and filling device suitable for slope-free embankment construction and a construction method of the replacing and filling device, and relates to the technical field of slope-free embankment construction replacing and filling. S2, a side slope and a foam concrete stepped groove are excavated; s3, a concrete protection panel is constructed; s4, angle steel connection; s5, foam concrete construction; and S6, mounting a pavement structure layer and accessories. The light replacement filling technology and the straight-wall retaining wall design are adopted, the problems that the roadbed of the soft foundation section is subjected to differential settlement and the road slope occupies a large land area are effectively solved, the service life of the road is prolonged, and the construction cost is reduced. Meanwhile, the steel wire meshes are arranged on the bottom layer and the top layer of the roadbed to improve the overall stability of the roadbed, the foam concrete can be prefabricated or cast in situ, the side wall protection panel and the foam concrete can be synchronously constructed, the pavement structure and the replacement layer can also be synchronously constructed, the construction efficiency is remarkably improved, the soft soil roadbed can be quickly and efficiently treated, and good economic benefits are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of replacement filling in flat embankment construction, and in particular to a replacement filling device suitable for flat embankment construction and a construction method thereof. Background Art

[0002] The replacement filling technology for flat embankment construction refers to the process of excavating the soft soil layer within a certain range not too deep below the bottom of the foundation during the construction of a flat embankment, and then filling it in layers with materials that are hard, strong, stable and erosion-resistant, and at the same time, using manual or mechanical methods to press, tamp and vibrate the layers to achieve the required density, thereby forming a good artificial foundation.

[0003] However, due to the low bearing capacity of the soil base in soft soil areas, the existing non-slope embankment construction and replacement often cause highway retaining wall collapse, and it is difficult to meet the bearing capacity requirements of the foundation for conventional gravity masonry retaining walls during construction. If reinforced concrete retaining walls are used, they must be pre-pressed before construction, which not only cannot be synchronized with the roadbed filling, but also brings many problems, and will also incur new costs and extend the construction period. In addition, due to the current shortage of land resources, conventional embankments constructed in the form of slope reduction will inevitably occupy a large amount of farmland. At the same time, the excavation of the slope destroys the original vegetation cover, resulting in a large amount of secondary bare land and serious soil erosion. In addition, the soft soil area is densely covered with water networks, and it may be impossible to meet the specified slope requirements due to limited on-site conditions.

[0004] There are related invention patents involved in the replacement of roadbed construction, as follows: Chinese patent application number: CN109322224B, the name of the invention patent is: A construction method for roadbed replacement, the invention discloses a construction method for roadbed replacement, including the following steps: S1, planing and milling of the old road, after planing and milling, asphalt mixture and waste containing lime and fly ash mixture are obtained, the slurry asphalt mixture is discarded, the lime and fly ash mixture is used as filler for the best moisture content test, and the filler is transported to the roadbed to be replaced; S2, paving, the filler obtained in step S1 is layered on the soil roadbed, after the lower layer is paved, the lower layer surface is sprinkled with water and moistened, and then the upper layer is paved; S3, rolling, rolling is carried out from both sides to the center until there is no obvious wheel mark and the compaction degree meets the requirements. S4, inspection, the compaction coefficient and foundation coefficient K30 of the roadbed after rolling are measured to check the qualified rate. The advantage of the present invention is that the waste after planing and milling of the old road can be reused, which plays a role in environmental protection, energy saving and reducing investment costs.

[0005] However, although the above-mentioned existing patents can achieve the effects of environmental protection, energy saving and reducing investment costs, there are still problems such as poor foundation bearing capacity in deep ultra-soft soil areas and excessive use of non-renewable land resources. Summary of the invention

[0006] The purpose of the present application is to provide a filling replacement device and a construction method suitable for the construction of a non-slope embankment, which is used to solve the problems of poor foundation bearing capacity in existing deep and ultra-soft soil areas and excessive use of non-renewable land resources.

[0007] The present invention adopts a foam concrete retaining wall to effectively reduce the requirements for foundation bearing capacity, and at the same time, changes the traditional slope construction to straight wall construction, rationally utilizes land, and reduces construction costs. This is aimed at the poor foundation bearing capacity in deep and ultra-soft soil areas, while saving non-renewable land resources, taking the path of sustainable development, rationally utilizing land, reducing construction costs, and properly handling the relationship between the construction of expressways and the short-term and long-term development of production and life of the people along the line, so as to achieve the purpose of saving resources. Taking the project as the object and the process as the core, combined with the specific construction project, a slope-free embankment replacement construction technology has been developed.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A filling replacement device suitable for the construction of a non-slope embankment includes a control box and a storage box, wherein the control box is fixedly connected to a T-shaped telescopic rod on one side close to the storage box, and both ends of the T-shaped telescopic rod are slidably connected to driving rods on the side away from the control box, and the driving rods are fixedly connected to a bidirectional motor on one side close to each other, and the bidirectional motor is fixedly connected to a connecting wire on the side close to the control box, and the connecting wire is electrically connected to the inside of the control box on the side away from the bidirectional motor, and the driving rod is fixedly connected to a fitting shovel frame on one end away from the control box, and two storage boxes are provided, and the two storage boxes are respectively fixedly connected to the tops of the two fitting shovel frames. Thus, the original soil layer can be shoveled.

[0009] As a further improvement of the present invention, a sliding groove is provided inside the top of the storage box, a sliding plate is slidably connected inside the sliding groove, a handle is fixedly connected to the top of the sliding plate, an inner frame is provided inside the storage box, a fixed tube is fixedly connected to the inner wall of the inner frame, a spring is fixedly connected to the inside of the fixed tube, an extrusion block is fixedly connected to the side of the spring close to the outside, a pulling line is fixedly connected to the side of the extrusion block, the pulling line is set in a groove opened in the storage box and completely fits the pulling line, a stop plate is fixedly connected to the bottom end of the pulling line, and a discharge port is opened through the side of the storage box close to the stop plate. The replacement material can be filled.

[0010] A construction method suitable for non-slope embankment construction, specifically comprising: S1, preloading of original embankment; S2, excavation of slope and foam concrete step trench; S3, concrete protection panel construction: including concrete protection panel foundation construction and construction of concrete protection panel; S4, angle steel connection: including installation of angle steel and connection of angle steel to protective panel; S5, Foam concrete construction: First, lay out the bottom steel mesh, then pour the foam concrete in layers, after pouring, lay out the top steel mesh, and finally maintain the foam concrete: S6, pavement structure layer and accessories installation: first grout the reserved holes in the concrete protection panel, then make the guardrail base, and finally install the guardrail.

[0011] As a further improvement of the present invention, the original embankment is pre-pressed by rolling with a roller with an excitation pressure of more than 40t, and the soil is kept moist by sprinkling water during the rolling process. When the soil is too wet and spring phenomenon occurs, it is dug up, dried, and replaced with soil or improved. This can prevent the replaced soil from being too dry or too wet.

[0012] As a further improvement of the present invention, in step S2, the step trench is excavated layer by layer from the upper opening line according to the slope ratio in the drawing, and the GPS instrument is used to measure and verify every 5m below the surface, so as to ensure the accuracy of the slope ratio and avoid the slope ratio fluctuating.

[0013] As a further improvement of the present invention, the concrete protection panel foundation construction is to construct a concrete base, the base is plain concrete, the construction removes silt and debris on the base soil, the construction is provided with waterproof and drainage measures, the base reserves a groove for the concrete protection panel when pouring concrete, a crushed stone leveling layer is constructed inside the base, a reserved short steel bar is set at the end of the protection panel, a grouting hole is set at the top of the concrete protection panel, two embedded rings are symmetrically arranged outside the grouting hole, and the two embedded rings are provided with connecting steel bars. This ensures that the concrete meets the design drawings and quality standards.

[0014] As a further improvement of the present invention, the angle steel is pressed into the soil, a fixing rod is bent and hung on the connecting steel bar, the fixing rod is connected to the angle steel in a V-shaped manner, and the connection between the fixing rod and the angle steel is welded, the height of the weld is flush with the steel plate, and the length and interval of the weld are uniform when the welding is intermittent welding. This ensures the stability and consistency of the welding quality, reduces the cutting and splicing workload at the construction site, and further improves the construction efficiency.

[0015] As a further improvement of the present invention, the cast-in-place concrete formwork is installed according to the design requirements, the tie rod reserved hole is arranged before the air bubble concrete is poured, the surface of the tubular material is brushed with a release agent, and the air bubble concrete is poured from the tie rod reserved hole to the cast-in-place concrete formwork, and the air bubble concrete is poured after the completion of the passing, the bottom steel wire mesh is placed and the elevation is performed after the pouring of one layer, the bottom steel wire mesh is laid after the elevation, and the foam concrete is poured after the laying is completed, and the layer thickness of the layered foam concrete is controlled to be 300mm to 800mm, and the foam concrete is directly covered on the surface of the concrete after the initial setting after the pouring and forming, and the sprinkling maintenance is carried out after the covering is completed, and the top steel wire mesh is laid after the pouring operation reaches the elevation of the top steel wire mesh, and the foam concrete is poured to the design elevation, and the anti-seepage geomembrane is laid after the top surface of the foam concrete is poured to the design height, and the anti-seepage geomembrane is used to moisturize and maintain the foam concrete. Thereby, the evaporation of water in the concrete can be reduced, the wet state of the concrete can be maintained, and the strength and durability of the concrete can be improved.

[0016] As a further improvement of the present invention, after the foam concrete is poured, cement mortar is poured into the reserved holes of the concrete protection panel. The guardrail base is made by pre-embedding a pre-embedded rod in the pavement structure layer, a guardrail base template is set up on the upper part of the pre-embedded rod, the bottom of the template is fixed on the concrete protection panel, the template and the middle vertical template are fixed by tension screws, the middle template and the end template are fixed by struts, columns are arranged inside the guardrail sleeve, and the columns are vertically buried according to the requirements of the drawings and the linear shape, a water barrier is arranged on the upper part of the guardrail base, an anti-blocking block is installed at the end of the column, the connecting bolt is used to install and fix the corrugated beam, and the guardrail bolt is installed on the column. In this way, the reserved holes can be filled, the bonding force between the concrete protection panel and the foam concrete is enhanced, and the stability and durability of the overall structure are improved.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts lightweight replacement technology and straight-wall retaining wall design, which effectively solves the problem of differential settlement of soft foundation section roadbed and large land area occupied by road slope, improves the service life of the road and reduces construction costs. At the same time, steel wire mesh is arranged on the bottom and top layers of the roadbed to improve the overall stability of the roadbed, foam concrete can be prefabricated or cast in place, the side wall protection panel and foam concrete are constructed simultaneously, and the pavement structure and replacement layer can also be constructed simultaneously, which significantly improves the construction efficiency and saves about 12% to 16% of the comprehensive cost. It can realize the rapid and efficient treatment of soft soil roadbed and has good economic benefits. Lightweight replacement technology effectively reduces the compression deformation of the roadbed by replacing soft soil with lightweight materials, thereby solving the problem of differential settlement of the soft foundation section roadbed. Construction measures such as steel wire mesh, foam concrete and side wall protection panels can be carried out simultaneously, which improves construction efficiency and further reduces construction costs.

[0018] The present invention proposes a lightweight replacement method for soft soil roadbed, which excavates the slope after pre-compression to form a stepped contact surface with the slag roadbed, and replaces the foamed concrete to form a lightweight retaining wall. The density of the foamed concrete does not exceed 450kg / m 3 , when the compressive strength is not less than 200kPa, there is no obvious differential settlement of the soft soil roadbed. Angle steel is reserved inside the foam concrete, and the protection panel on the outside of the retaining wall is fixed by tie rods and angle steel V-shaped pull welding to form a straight wall retaining wall, without slope, rational use of land, and reduced cost. Wire mesh is arranged on the bottom and top layers of the roadbed to improve the overall stability of the roadbed. Foam concrete can be prefabricated or cast in place, the side wall protection panel and foam concrete are constructed simultaneously, and the pavement structure and the replacement layer can also be constructed simultaneously, which significantly improves the construction efficiency and shortens the construction period. By using foam concrete with a density not exceeding 450kg / m³ and a compressive strength not less than 200kPa for replacement, the differential settlement of the soft soil roadbed can be significantly reduced, ensuring the stability and safety of the roadbed. In addition, the arrangement of wire mesh on the bottom and top layers of the roadbed can significantly improve the overall stability and deformation resistance of the roadbed, further ensuring the safety and durability of the road. As a lightweight and high-strength material, the production process of foam concrete has little impact on the environment and is easy to recycle and reuse, which meets the requirements of environmental protection and sustainable development.

[0019] Through the driving rod, the bidirectional motor, the storage box and the discharge port, the control box controls the bidirectional motor in series through the connecting line to start, thereby driving the driving rod to move left and right. The left and right movement of the driving rod will make the top fit the shovel frame to drive the storage box to move left and right. When the two storage boxes are close to each other, the extrusion block will move inward, thereby driving the baffle plate not to block the discharge port, so that the concrete stored in the storage box will flow out from the discharge port, thereby achieving the effect of shoveling the original soil and replacing the concrete at the same time. The continuous operation means that the two steps of shoveling the original soil and replacing the concrete are closely connected, and there is no need to wait for the previous step to be completely completed before proceeding to the next step. This greatly shortens the construction period and improves the overall construction efficiency. The continuous operation also reduces the problem of repeated construction caused by the incoherent construction steps, and in the continuous operation, the quantity and specifications of the required concrete can be calculated more accurately to avoid material waste. At the same time, since the construction steps are closely connected, the additional costs caused by material transportation and storage can be reduced. The continuous operation also helps to reduce the emission of pollutants such as dust, noise and wastewater during the construction process. By rationally arranging construction steps and adopting environmental protection measures, the impact of construction on the environment can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a partial three-dimensional structural diagram of the filling device of the present invention.

[0022] Figure 2 For the present invention Figure 1 A three-dimensional structure diagram from another angle.

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the control electric box and the T-shaped telescopic rod in the present invention.

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the storage box in the present invention.

[0025] Figure 5 It is a flow chart of the steps of the present invention.

[0026] Figure 6 This is a cross-sectional view of the lightweight replacement after pre-compression of the deep soft foundation roadbed of the present invention.

[0027] Figure 7 This is the formwork diagram of the concrete protection panel of the present invention.

[0028] Figure 8 It is a schematic diagram of the connection between the angle steel and the concrete protection panel of the present invention.

[0029] Fig. 9 Sectional view of the invented angle steel and concrete protection panel.

[0030] Fig.10 This is a schematic diagram of the guardrail base formwork.

[0031] In the figure: 101, control electric box; 102, T-shaped telescopic rod; 103, driving rod; 104, fitting shovel frame; 105, connecting wire; 106, bidirectional motor; 201, storage box; 202, sliding groove; 203, sliding plate; 204, handle; 205, fixing tube; 206, inner frame; 207, spring; 208, extrusion block; 209, pulling wire; 210, baffle plate; 211, discharge port. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-4 As shown, the present invention provides a technical solution: a filling replacement device suitable for the construction of a slope-free embankment, comprising a control electrical box 101 and a storage box 201, the control electrical box 101 is fixedly connected with a T-shaped telescopic rod 102 on the side close to the storage box 201, both ends of the T-shaped telescopic rod 102 on the side away from the control electrical box 101 are slidably connected with driving rods 103, the driving rods 103 are fixedly connected with a bidirectional motor 106 on the side close to each other, the bidirectional motor 106 is fixedly connected with a connecting wire 105 on the side close to the control electrical box 101, and the connecting wire 105 is electrically connected to the inside of the control electrical box 101 on the side away from the bidirectional motor 106, and the driving rods 103 are fixedly connected with a fitting shovel frame 104 on the end away from the control electrical box 101, and two storage boxes 201 are provided, and the two storage boxes 201 are respectively fixedly connected to the top of the two fitting shovel frames 104. A sliding groove 202 is provided inside the top of the storage box 201, and a sliding plate 203 is slidably connected inside the sliding groove 202, and a handle 204 is fixedly connected to the top of the sliding plate 203. An inner frame 206 is provided inside the storage box 201, and a fixed tube 205 is fixedly connected to the inner wall of the inner frame 206, and a spring 207 is fixedly connected inside the fixed tube 205. An extrusion block 208 is fixedly connected to the side of the spring 207 close to the outside, and a pulling line 209 is fixedly connected to the side of the extrusion block 208. The pulling line 209 is set in a groove opened in the storage box 201 that is completely fitted with the pulling line 209, and a baffle plate 210 is fixedly connected to the bottom end of the pulling line 209. A discharge port 211 is opened through the side of the storage box 201 close to the baffle plate 210. This will achieve the effect of removing the original soil and replacing the concrete at the same time. The continuous operation means that the two steps of removing the original soil and replacing the concrete are closely connected, and there is no need to wait for the previous step to be completely completed before proceeding to the next step. This greatly shortens the construction period and improves the overall construction efficiency. The continuous operation also reduces the problem of repeated construction caused by inconsistent construction steps.

[0034] The present invention also provides a construction method suitable for non-slope embankment construction, such as Figure 5 As shown, the following steps are included: S1, pre-compression of the original embankment. The fill roadbed is carried out in layers and the fill elevation is controlled. Each layer is spread by a bulldozer and leveled by a grader. The fill embankment is rolled by a roller with an excitation pressure of more than 40t. If the soil is found to be too dry and the surface is loose during the rolling process, it is properly watered; if the soil is too wet and a "spring" phenomenon occurs, it is excavated and dried, replaced with soil or improved. The rolling order is from both sides to the middle.

[0035] S2, excavation of slopes and foam concrete step grooves. The original embankment is excavated to the designed position after slope preloading according to the design requirements, and the foam concrete step groove is excavated at the same time. Excavation is carried out layer by layer from the upper opening line, and the excavation is carried out according to the slope ratio of the drawing. In order to ensure the accuracy of the slope ratio and avoid the slope ratio being large or small, which will cause the roadbed width to be different, thus affecting the appearance, the GPS instrument is measured and calibrated every 5m lower.

[0036] like Figure 7 As shown, S3, concrete protection panel construction: including concrete protection panel foundation construction and concrete protection panel construction. The concrete protection panel foundation construction is to construct a concrete base, the base is plain concrete, remove silt and debris on the base soil, and have waterproof and drainage measures. The garbage in the formwork should be cleaned up, and the formwork should be wetted with water, and then concrete is poured and a groove for the concrete protection panel is reserved on the base. At the same time, a crushed stone leveling layer is constructed on the inside of the base.

[0037] During construction, a reserved short steel bar is set at the end of the concrete protection panel. A grouting hole is set on the concrete protection panel. Two embedded rings are symmetrically set on the outside of the grouting hole, and connecting steel bars are set at the ends of the two embedded rings. The protection panel can be prefabricated or cast-in-place. If it is prefabricated, the concrete protection panel is hoisted into the cup mouth of the concrete base. After adjusting the position, the concrete protection panel and the concrete base are fixed with screws, and then mortar is poured into the cup mouth; if it is cast-in-place, the concrete protection panel template is supported on both sides of the groove of the concrete base, and the template tension bolts are set, and then the concrete is poured. When cast-in-place, the installed composite steel template is composed of a plane template, a negative corner template, and a positive corner template. The U-shaped cards, latches and other accessories used for splicing the longitudinal and transverse ribs are required to be complete and firm, without looseness or omission. After the template is installed, its cross-sectional dimensions and elevations, tension bolts, connecting rod supports, etc. should be pre-inspected.

[0038] like Figure 8-Figure 9 As shown, S4, angle steel connection: including the installation of angle steel and the connection between angle steel and protective panel. According to the design requirements of the drawings, the angle steel is pressed into the soil. The connecting steel bars are inserted into the two adjacent embedded rings on the concrete protective panel, and the ends of the tie rods or fixed rods are bent and hung on the connecting steel bars, and connected with the angle steel in a V-shaped pull. Welding is used at the connection. The weld is required to be smooth during welding, and there must be no welding defects such as pores and slag inclusions. If defects are found, they should be repaired in time. The weld height is generally close to that of the steel plate. When intermittent welding is used, the weld length and interval should be uniform.

[0039] S5, foam concrete construction: first arrange the bottom steel mesh, then pour the foam concrete in layers, arrange the top steel mesh after pouring, and finally maintain the foam concrete. The arrangement of the bottom steel mesh is to install the cast-in-place concrete formwork according to the design requirements, arrange the tie rod reserved holes before pouring the bubble concrete, apply the release agent on the surface of the tubular material, pass through the tie rod reserved holes on the prefabricated retaining plate to the cast-in-place concrete formwork, and then pour the bubble concrete. After pouring one layer, place the bottom steel mesh elevation and lay the bottom steel mesh, and then continue to pour the foam concrete.

[0040] Layered pouring of foam concrete is a method of mechanized pumping and pouring on site, combined with rapid construction method to fill foam concrete. During filling, all equipment is concentrated on one side of the bridge head filling body for rapid pouring, and it stops when the planned elevation is reached at one time, and then it is compacted mechanically. For compaction blind areas, small vibrating compaction equipment can be used for individual compaction, and the concrete surface is scraped flat after compaction. After a period of time, the next layer is poured after the foam concrete has the initial strength, and the template of the next layer to be poured is supported before pouring. When foam concrete is constructed, it is poured horizontally in layers, and the layer thickness is generally controlled at 300mm~800mm. Too thin is not conducive to the integrity of the single-layer foam concrete, and too thick is easy to cause the compression of bubbles in the lower foam concrete to affect the bulk density, and at the same time it brings inconvenience to the construction operation. The overall pouring is carried out in layers and staggered until the designed total filling elevation is reached. In order to ensure that the bubbles in the bubble mixed lightweight soil are independent and evenly distributed, the defoaming of bubbles and the segregation of materials are controlled to a minimum. During the construction process, a certain vibration speed is maintained to avoid excessive vibration. During the pouring process, pour directly with the front end of the hose, and the discharge port should be buried in the foam concrete or as close to the surface of the foam concrete as possible. The entire filling is poured horizontally in layers, and the time interval between pouring each layer is not less than one day and night. At the same time, the maximum construction thickness and the minimum construction thickness should be paid attention to at one time. After the foam concrete is poured and formed and initially solidified, it is directly covered on the surface of the concrete, and then watered and cured in time to isolate the concrete components from the air to prevent water from being lost too quickly and causing shrinkage cracks. In addition, if it rains during construction, pay attention to covering the bubble mixed lightweight soil after construction to avoid rain, to ensure that cracks will not be caused by insufficient maintenance.

[0041] The top layer of wire mesh is laid after the pouring operation reaches the elevation for placing the top layer of wire mesh, and then the foam concrete is poured to the designed elevation. After the top surface of the foam concrete is poured to the designed elevation, the anti-seepage geomembrane is laid in time to keep the foam concrete moist. After the foam concrete is poured and formed and initially solidified, it is directly covered on the surface of the concrete, and then watered and cured in time to isolate the concrete components from the air to prevent the water from dissipating too quickly and causing shrinkage cracks. In addition, if it rains during construction, pay attention to covering the bubble mixed lightweight soil after construction to avoid rain, to ensure that cracks will not be caused by insufficient maintenance.

[0042] like Fig.10 As shown, S6, pavement structure layer, accessories installation: first grouting is performed in the reserved holes of the concrete protection panel, then the guardrail base is made, and finally the guardrail is installed. Grouting of the reserved holes of the concrete protection panel is to pour cement mortar into the reserved holes of the concrete protection panel after the foam concrete is poured. During compaction grouting, the grouting pipe should first be grouted at low pressure on the outer layer. The grouting pressure should be determined by on-site test holes to form a closed slurry, and then extended to the designed position for high-pressure grouting.

[0043] The guardrail base can be cast in situ or prefabricated. When cast in situ, embedded rods are embedded in the pavement structure layer, and then the guardrail base template is set up on the upper part of the embedded rods. The bottom of the oblique template is fixed on the concrete protection panel. The oblique template and the middle vertical template are fixed with tension screws, and the middle vertical template and the end vertical template are fixed with struts. Then the concrete is poured, and the angle steel extends to the inside of the guardrail base. The guardrail sleeve is reserved on the base, and the gravel blind ditch is constructed on the inside of the base. If prefabricated, the prefabricated guardrail base can be hoisted and installed. To install the guardrail, first place the column inside the guardrail sleeve. The columns should be buried vertically according to the requirements and linear shapes of the drawings, and a water retaining belt is set on the upper part of the reinforced concrete guardrail base. Install the anti-blocking block at the end of the column, and then install and fix the corrugated beam with connecting bolts. The guardrail is installed according to the drawings and installed on the column with bolts; the metal mesh should be stretched and tightened, and the entire structure should not be distorted.

[0044] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filling replacement device suitable for flat embankment construction, comprising a control box (101) and a storage box (201), characterized in that: The control box (101) is fixedly connected to a T-shaped telescopic rod (102) on the side close to the storage box (201), and both ends of the T-shaped telescopic rod (102) on the side away from the control box (101) are slidably connected to driving rods (103), and the driving rods (103) are fixedly connected to a bidirectional motor (106) on the side close to each other, and the bidirectional motor (106) is fixedly connected to a connecting wire (105) on the side close to the control box (101), and the connecting wire (105) is electrically connected to the inside of the control box (101) on the side away from the bidirectional motor (106), and the driving rod (103) is fixedly connected to a fitting shovel frame (104) on the end away from the control box (101), and two storage boxes (201) are provided, and the two storage boxes (201) are respectively fixedly connected to the top ends of the two fitting shovel frames (104).

2. A filling replacement device suitable for flat embankment construction as claimed in claim 1, characterized in that: The top of the storage box (201) is provided with a sliding groove (202), the inside of the sliding groove (202) is slidably connected to a sliding plate (203), the top of the sliding plate (203) is fixedly connected to a handle (204), the inside of the storage box (201) is provided with an inner frame (206), the inner wall of the inner frame (206) is fixedly connected to a fixing tube (205), the inside of the fixing tube (205) is fixedly connected to a spring (207), and the storage box (201) is provided with an inner frame (206). The spring (207) is fixedly connected to an extrusion block (208) on one side close to the outside, and a pulling line (209) is fixedly connected to the side of the extrusion block (208). The pulling line (209) is arranged in a groove provided in the storage box (201) and completely fitted with the pulling line (209). The bottom end of the pulling line (209) is fixedly connected to a stop plate (210), and a discharge port (211) is provided through one side of the storage box (201) close to the stop plate (210).

3. A construction method comprising the filling replacement device according to any one of claims 1 to 2, characterized in that: The specific steps include: S1, preloading of original embankment; S2, excavation of slope and foam concrete step trench; S3, concrete protection panel construction: including concrete protection panel foundation construction and construction of concrete protection panel; S4, angle steel connection: including installation of angle steel and connection of angle steel to protective panel; S5, foam concrete construction: first, arrange the bottom steel wire mesh, then pour the foam concrete in layers, after pouring, arrange the top steel wire mesh, and finally, maintain the foam concrete; S6, pavement structure layer and accessories installation: first grout the reserved holes in the concrete protection panel, then make the guardrail base, and finally install the guardrail.

4. A construction method suitable for flat embankment construction as claimed in claim 3, characterized in that: In step S1, the original embankment is pre-compressed by rolling with a roller with an excitation pressure of more than 40t. The soil is kept moist by sprinkling water during the rolling process. If the soil is too wet and spring phenomenon occurs, it is dug up, dried, replaced with soil or improved.

5. A construction method suitable for flat embankment construction as claimed in claim 4, characterized in that: In step S2, the step trench is excavated layer by layer from the upper opening line according to the slope ratio in the drawing, and the GPS instrument is used to measure and verify every 5m below the surface.

6. A construction method suitable for flat embankment construction as claimed in claim 3, characterized in that: In step S3, the foundation construction of the concrete protection panel is to construct a concrete base, which is plain concrete. The construction removes silt and debris on the base soil, and the construction is provided with waterproofing and drainage measures. The base reserves a groove for the concrete protection panel when pouring concrete, and a crushed stone leveling layer is constructed on the inner side of the base. Short steel bars are reserved at the end of the protection panel, and a grouting hole is provided at the top of the concrete protection panel. Two embedded rings are symmetrically provided on the outside of the grouting hole, and the two embedded rings are provided with connecting steel bars.

7. A construction method suitable for flat embankment construction as claimed in claim 6, characterized in that: In step S4, the angle steel is pressed into the soil, a fixing rod is bent and hung on the connecting steel bar, the fixing rod is V-connected with the angle steel, and the connection between the fixing rod and the angle steel is welded. The weld height is flush with the steel plate, and the weld length and interval are uniform when intermittent welding is used.

8. A construction method suitable for flat embankment construction as claimed in claim 3, characterized in that: In the step S5, the cast-in-place concrete formwork is installed according to the design requirements, and before the air bubble concrete is poured, a tie rod reserved hole is arranged, and a release agent is applied to the surface of the tubular material, and the tubular material passes through the tie rod reserved hole to the cast-in-place concrete formwork. After the passing is completed, the air bubble concrete is poured, and the bottom layer of steel wire mesh is placed and leveled after pouring one layer. After the leveling, the bottom layer of steel wire mesh is laid, and after the laying is completed, the foam concrete is poured. The layer thickness of the layered foam concrete is controlled to be 300mm to 800mm. The foam concrete is directly covered on the surface of the concrete after the initial setting after casting and forming. After the covering is completed, watering and curing are carried out. The top layer of steel wire mesh is laid after the pouring operation reaches the elevation of placing the top layer of steel wire mesh. The foam concrete is poured to the designed elevation. After the top surface of the foam concrete is poured to the designed height, an impermeable geomembrane is laid, and the impermeable geomembrane is used for moisturizing and curing the foam concrete.

9. A construction method suitable for flat embankment construction as claimed in claim 3, characterized in that: In the step S6, after the foam concrete is poured, cement mortar is poured into the reserved holes of the concrete protection panel. The guardrail base is made by pre-embedding embedded rods in the pavement structure layer, and a guardrail base template is set up on the upper part of the embedded rods. The bottom of the template is fixed to the concrete protection panel, and the template and the middle vertical template are fixed with tension screws, and the middle template and the end template are fixed with struts. Columns are arranged inside the guardrail sleeve, and the columns are vertically buried according to the requirements and linear shapes of the drawings. A water retaining belt is arranged on the upper part of the guardrail base, and an anti-obstruction block is installed on the end of the column. The connecting bolts are used to install and fix the corrugated beam, and the guardrail bolts are installed on the columns.

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