A widened old embankment slope water seepage treatment structure of a road and a construction method thereof

Abstract

This invention discloses a seepage treatment structure and construction method for the old embankment slope of a widened highway, belonging to the field of highway widening technology. The seepage treatment structure for the old embankment slope of this widened highway includes permeable concrete, a flow guiding component, a widened pavement, and a widened embankment. The permeable concrete is placed on the old embankment slope. The flow guiding component includes a first flow guiding plate and a second flow guiding plate. The first flow guiding plate covers and is placed on the old embankment slope and is equipped with several flow guiding pipes. The second flow guiding plate covers and is placed on the permeable concrete and is covered with a fixing plate. The fixing plate and the second flow guiding plate together form a drainage channel communicating with the several flow guiding pipes. Water from the ground surface flows through the flow guiding pipes into the space between the old embankment and the widened pavement, and finally exits from the drainage channel along the inclined direction of the permeable concrete, thereby preventing water accumulation at the bottom of the old embankment slope, reducing the corrosion caused by accumulated water, and preventing deformation of the old embankment slope.

Description

Technical Field

[0001] This invention relates to the field of highway widening technology, and in particular to a structure and construction method for treating seepage on the slope of an old embankment for widening a highway. Background Technology

[0002] To meet the growing demand for transportation and improve traffic flow, traffic management measures such as improving public transportation systems, implementing traffic control, and optimizing road design are usually adopted. Among these measures, widening highways can improve traffic efficiency by increasing road capacity.

[0003] When widening a highway, the bottom slope between the widened highway and the old road is prone to water seepage, which causes water to seep into the interior of the widened embankment. The seeping water causes corrosion inside and may even cause deformation of the embankment, affecting the use of the highway. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a seepage treatment structure and construction method for the old embankment slope of a widened highway, which can prevent water from seeping into the old embankment slope of the widened highway and avoid corrosion of the structure.

[0005] According to a first aspect of the present invention, a seepage treatment structure for an old embankment slope of a widened highway includes permeable concrete, which is disposed on the old embankment slope, with its upper surface inclined downwards at the end away from the old embankment slope; and a flow guiding assembly, including a first flow guiding plate and a second flow guiding plate, the first flow guiding plate covering the old embankment slope and having a plurality of flow guiding pipes evenly distributed along the road extension direction and extending along the inclined direction of the old embankment slope, and the second flow guiding plate covering the permeable concrete. On the ground, a second guide plate is connected to the first guide plate, and a fixing plate is installed on the second guide plate. The fixing plate is connected to the first guide plate, and the fixing plate and the second guide plate enclose a drainage channel, which is connected to several guide pipes. The road surface is widened and is installed on the first guide plate. The upper surface of the widened road surface is on the same horizontal plane as the old road surface. Several clearance grooves for accommodating guide pipes are opened on the side of the widened road surface near the first guide plate. The embankment is widened and is installed on the fixing plate. The widened embankment is connected to the widened road surface.

[0006] According to an embodiment of the present invention, a seepage treatment structure for an old embankment slope of a widened highway has at least the following beneficial effects: Permeable concrete is disposed at the bottom of the old embankment slope, and the upper surface of the permeable concrete slopes downward away from the old embankment slope. A first guide plate covers and extends along the front-to-back direction on the old embankment slope, and a second guide plate covers and is disposed on the permeable concrete. A plurality of guide pipes are provided on the first guide plate, evenly distributed along the front-to-back direction, and extending along the inclined direction of the first guide plate. A fixing plate is provided on the second guide plate, and the fixing plate and the second guide plate together form a drainage channel, which is interconnected with the plurality of guide pipes. A widened road surface is covered on the first guide plate, and its upper surface is at the same horizontal plane as the old road surface. A widened embankment is covered on the fixing plate, and the left side of the widened embankment is connected to the right side of the widened road surface. As a result, the surface water flows around the gap between the old and new embankments and flows through the diversion pipe between the old embankment and the widened road surface. Finally, it is discharged from the drainage channel along the inclined direction of the permeable concrete, thus preventing water from flowing into the bottom of the old embankment slope and forming water accumulation. This reduces the corrosion of the old embankment slope caused by water accumulation, prevents the old embankment slope from deforming, and extends the service life of the road.

[0007] According to some embodiments of the present invention, the flow guiding assembly further includes a seepage channel, which is opened at the top of the widened road surface along the road extension direction. The seepage channel is connected to the first flow guiding plate. A waterproof layer is provided in the seepage channel. The waterproof layer is connected to the first flow guiding plate and the widened road surface. The waterproof layer is used to prevent water from seeping between the first flow guiding plate and the widened road surface.

[0008] According to some embodiments of the present invention, the diversion assembly further includes permeable bitumen, which is located in the infiltration groove and covers the top of the waterproof layer and the diversion pipe.

[0009] According to some embodiments of the present invention, a filter plate is provided at the upper port of the guide tube, and the filter plate is used to prevent impurities from clogging the guide tube.

[0010] According to some embodiments of the present invention, a permeable cloth is provided at the lower end of the guide pipe, the permeable cloth is located between the guide pipe and the fixing plate, and the permeable cloth is used to prevent the loss of soil in the water.

[0011] According to some embodiments of the present invention, a plurality of support plates are provided between the second guide plate and the fixed plate. The plurality of support plates are evenly distributed along the road extension direction. The support plates extend along the inclined direction of the second guide plate and divide the drainage channel into a plurality of drainage channels. The support plates are used to prevent the fixed plate from deforming and collapsing.

[0012] According to some embodiments of the present invention, a plurality of limiting grooves are provided on the waterproof layer to allow the passage of the guide pipe, and the plurality of limiting grooves correspond to a plurality of placement grooves respectively.

[0013] According to some embodiments of the present invention, the inclination angle of the permeable concrete is smaller than that of the old embankment slope.

[0014] A construction method for a seepage treatment structure for an old embankment slope of a widened highway, according to a second aspect of the present invention, includes:

[0015] Step 1: Clean up the construction area, remove any unnecessary debris and vegetation, and clear the old embankment slope to expose the yellow soil.

[0016] Step 2: Lay a layer of permeable concrete at the bottom of the old embankment slope;

[0017] Step 3: Install the first guide plate on the slope of the old embankment and the second guide plate on the permeable concrete.

[0018] Step 4: Install several guide pipes on the first guide plate, and install a fixing plate and several support plates on the second guide plate to form multiple drainage channels. Lay a permeable cloth between the guide pipes and the drainage channels.

[0019] Step 5: Lay a widened road surface with permeable grooves on the first guide plate and the fixing plate, lay a waterproof layer in the permeable grooves, and lay permeable asphalt on the waterproof layer.

[0020] Step 7: Lay a widened embankment on the widened road surface and fixing plate, and lay green vegetation on the widened embankment.

[0021] According to some embodiments of the present invention, in step five, the upper surface of the waterproof layer and the opening of the guide pipe are located on the same horizontal plane.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of a seepage treatment structure for an old embankment slope widening project according to an embodiment of the present invention.

[0025] Figure 2 yes Figure 1 Exploded view in the image;

[0026] Figure 3 yes Figure 1 A schematic diagram of the structure containing a hidden waterproof layer and permeable asphalt;

[0027] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0028] Figure 5 yes Figure 1 Schematic diagram of the middle limiting groove and the clearance groove;

[0029] Figure 6 yes Figure 2 The image contains an exploded view of the widened road surface and embankment.

[0030] Figure label:

[0031] 100mm of permeable concrete;

[0032] The flow guiding component 200 includes a first flow guiding plate 210, a flow guiding pipe 211, a filter plate 212, a permeable cloth 213, a second flow guiding plate 220, a fixing plate 221, a support plate 222, a drainage channel 223, a seepage channel 230, a waterproof layer 231, a limiting groove 231a, and a permeable asphalt 232.

[0033] Widen the road surface by 300mm and add a clearance groove of 310mm;

[0034] Widen the embankment by 400 mm;

[0035] The old embankment slope is 10, and the old road surface is 20. Detailed Implementation

[0036] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 limiting this invention.

[0038] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0040] refer to Figures 1 to 6 This invention describes a seepage treatment structure for an old embankment slope of a widened highway and its construction method, according to an embodiment of the present invention.

[0041] like Figures 1 to 6 As shown, a seepage treatment structure for the old embankment slope of a widened highway includes permeable concrete 100, a flow guiding component 200, a widened road surface 300, and a widened embankment 400. The permeable concrete 100 is set on the old embankment slope 10, and the upper surface of the permeable concrete 100 is inclined downward along the end away from the old embankment slope 10. The flow guiding assembly 200 includes a first flow guiding plate 210 and a second flow guiding plate 220. The first flow guiding plate 210 is installed on the old embankment slope 10 and is provided with a plurality of flow guiding pipes 211. The plurality of flow guiding pipes 211 are evenly distributed along the road extension direction and extend along the inclined direction of the old embankment slope 10. The second flow guiding plate 220 is installed on the permeable concrete 100 and is connected to the first flow guiding plate 210. A fixing plate 221 is installed on the second flow guiding plate 220 and is connected to the first flow guiding plate 210. The fixing plate 221 and the second flow guiding plate 220 enclose each other to form a drainage channel, and the drainage channel is connected to the plurality of flow guiding pipes 211. The widened road surface 300 is installed on the first guide plate 210. The upper surface of the widened road surface 300 is on the same horizontal plane as the old road surface 20. The widened road surface 300 has several clearance grooves 310 on the side near the first guide plate 210 to accommodate guide pipes 211. The widened embankment 400 is installed on the fixing plate 221 and is connected to the widened road surface 300.

[0042] like Figure 1 As shown, permeable concrete 100 is installed at the bottom of the old embankment slope 10, and the upper surface of permeable concrete 100 slopes downward to the right. A first guide plate 210 covers the old embankment slope 10 and extends along the front-to-back direction, with its inclination consistent with that of the old embankment slope 10. A second guide plate 220 covers the permeable concrete 100, with its inclination consistent with that of the permeable concrete 100, and connects with the first guide plate 210 to form a zigzag shape. Figure 2As shown, a plurality of guide pipes 211 are provided on the first guide plate 210, and the guide pipes 211 are evenly distributed on the first guide plate 210 in the front-back direction, and the guide pipes 211 extend in the inclined direction of the first guide plate 210; a fixing plate 221 is provided on the second guide plate 220, and the cross-section of the fixing plate 221 is inverted U-shaped, so the fixing plate 221 and the second guide plate 220 can enclose a drainage channel, the upper end of the drainage channel is connected to the plurality of guide pipes 211, and the lower end of the drainage channel is connected to the outside. The widened road surface 300 is covered on the first guide plate 210, and its upper surface is flush with the old road surface 20. On the left side of the widened road surface 300, several clearance grooves 310 matching the shape of the diversion pipe 211 are provided to accommodate the diversion pipe 211. The widened embankment 400 is located on the right side of the widened road surface 300 and is covered by the fixing plate 221. The right side of the widened embankment 400 is sloped. As a result, the water flow on the ground avoids the gap between the old and new embankments and flows into the space between the old embankment and the widened road surface 300 through the diversion pipe 211. Finally, it is discharged from the drainage channel along the inclined direction of the permeable concrete 100, thereby preventing water from entering the bottom of the old embankment slope 10 and forming water accumulation, reducing the corrosion of the old embankment slope 10 by accumulated water, preventing deformation of the old embankment slope 10, and extending the service life of the road.

[0043] Specifically, the inclination angle of the permeable concrete 100 is smaller than that of the old embankment slope 10, that is, the inclination angle of the second guide plate 220 is smaller than that of the first guide plate 210.

[0044] In some specific embodiments of the present invention, the flow guiding component 200 further includes a seepage channel 230, which is opened at the top of the widened road surface 300 along the road extension direction. The seepage channel 230 is connected to the first flow guiding plate 210. A waterproof layer 231 is provided in the seepage channel 230. The waterproof layer 231 is connected to the first flow guiding plate 210 and the widened road surface 300. The waterproof layer 231 is used to prevent water from seeping into the space between the first flow guiding plate 210 and the widened road surface 300.

[0045] like Figure 1 and 3As shown, a seepage groove 230 is provided on the upper left side of the widened road surface 300. A waterproof layer 231 is installed in the seepage groove 230. The left side of the waterproof layer 231 is connected to the first guide plate 210, and the right and lower sides of the waterproof layer 231 are connected to the widened road surface 300. The upper surface of the waterproof layer 231 is flush with the opening of the guide pipe 211 to ensure that the seeping water can flow into the guide pipe 211. Specifically, the waterproof layer 231 is made of SBS modified bitumen membrane. SBS modified bitumen membrane has good elasticity and flexibility, which can effectively resist the stress caused by temperature changes and structural movements, improve the durability of the waterproof layer 231, and has excellent weather resistance, which can resist the erosion of factors such as ultraviolet radiation, high temperature, low temperature and chemical corrosion, thereby extending the service life of the waterproof layer 231. Meanwhile, SBS modified bitumen membrane also has good adhesion properties and can be bonded by hot melt or cold adhesive to ensure that the waterproof layer 231 can be firmly and sealed in the seepage groove 230.

[0046] Specifically, such as Figure 5 As shown, the left end of the waterproof layer 231 is provided with several limiting grooves 231a that can accommodate the flow guide tube 211. The limiting grooves 231a and the flow guide tube 211 are matched in shape, and the several limiting grooves 231a correspond to several clearance grooves 310 respectively, and the same flow guide tube 211 is accommodated with the corresponding clearance groove 310.

[0047] In some specific embodiments of the present invention, the diversion assembly 200 further includes permeable asphalt 232, which is located in the seepage groove 230 and covers the top of the waterproof layer 231 and the diversion pipe 211.

[0048] like Figure 1 and Figure 2 As shown, permeable asphalt 232 is placed in the infiltration groove 230 and laid on top of the waterproof layer 231 and the guide pipe 211. Water on the road surface can enter the infiltration groove 230 through the permeable asphalt 232 in the infiltration groove 230. At the same time, it also has a certain protective effect on the waterproof layer 231. The waterproof layer 231 can prevent water from flowing from the infiltration groove 230 into the space between the first guide plate 210 and the widened road surface 300, so that the water only flows into the guide pipe 211. The guide pipe 211 extends into the interior of the fixing plate 221, thus extending the service life of the waterproof layer 231 and further preventing water from seeping into the space between the widened road surface 300 and the guide plate, thereby avoiding soil loss inside the structure.

[0049] Specifically, the waterproof layer 231 and the filter plate 212 are located on the same horizontal plane.

[0050] In some specific embodiments of the present invention, a filter plate 212 is provided at the upper port of the guide pipe 211, and the filter plate 212 is used to prevent impurities from clogging the guide pipe 211.

[0051] In some specific embodiments of the present invention, a permeable cloth 213 is provided at the lower end of the guide pipe 211. The permeable cloth 213 is located between the guide pipe 211 and the fixing plate 221. The permeable cloth 213 is used to prevent the loss of soil in the water.

[0052] like Figure 3 and 4 As shown, multiple guide pipes 211 are fixedly connected to the right side of the first guide plate 210. The guide pipes 211 are connected to the fixed plate 221. A filter plate 212 is fixedly installed at the upper end of the guide pipe 211. The filter plate 212 is located at the bottom end of the permeable asphalt 232. The filter plate 212 can filter the water flow, thereby preventing impurities from clogging the guide pipes 211 and avoiding affecting their use. Figure 6 As shown, a permeable cloth 213 is installed on the left end of the fixed plate 221. That is, the permeable cloth 213 is located between the fixed plate 221 and the first guide plate 210 and is attached to the lower port of the guide pipe 211. Thus, the permeable cloth 213 can filter the infiltrated water flow, block the mud in the water, prevent the mud in the water from being lost, avoid the formation of a hollow state in the structure, and thus avoid the collapse of the structure.

[0053] In some specific embodiments of the present invention, a plurality of support plates 222 are provided between the second guide plate 220 and the fixed plate 221. The plurality of support plates 222 are evenly distributed along the road extension direction. The support plates 222 extend along the inclined direction of the second guide plate 220 and divide the drainage channel into a plurality of drainage channels 223. The support plates 222 are used to prevent the fixed plate 221 from deforming and collapsing.

[0054] like Figure 6 As shown, a fixing plate 221 is installed on the second guide plate 220. The fixing plate 221 has an inverted U-shaped cross-section. Several support plates 222 are installed between the fixing plate 221 and the second guide plate 220. The support plates 222 support the fixing plate 221 and the second guide plate 220 to prevent the fixing plate 221 from deforming or collapsing during use, which would affect subsequent use. The support plates 222 extend along the inclined direction of the second guide plate 220 and are evenly arranged between the fixing plate 221 and the guide plate in the front-back direction, dividing the drainage channel into multiple drainage channels 223 with square cross-sections. The infiltrated water flows from the guide pipe 211 into the drainage channels 223 and finally exits from the drainage channels 223.

[0055] In some specific embodiments of the present invention, a construction method for a seepage treatment structure for widening an old highway embankment slope includes:

[0056] Step 1: Clean up the construction area, remove any unnecessary debris and vegetation, and clean up the old embankment slope 10 until the yellow soil is exposed. Specifically, vertically chisel the bottom part of the old embankment slope 10 to make it flat.

[0057] Step 2: Lay a layer of permeable concrete 100 at the bottom of the old embankment slope 10. The upper surface of the permeable concrete 100 is inclined away from the old embankment slope 10, and the inclination angle of the permeable concrete 100 is smaller than the inclination angle of the old embankment slope 10.

[0058] Step 3: Install the first guide plate 210 on the old embankment slope 10 and the second guide plate 220 on the permeable concrete 100. The first guide plate 210 and the second guide plate 220 are connected to form a zigzag shape.

[0059] Step 4: Install several guide pipes 211 evenly on the first guide plate 210 along the road extension direction, with the guide pipes 211 extending along the inclined direction of the first guide plate 210; install fixing plates 221 and several support plates 222 evenly on the second guide plate 220 along the road extension direction to form multiple drainage channels 223 with square cross sections, and set a permeable cloth 213 between the guide pipes 211 and the drainage channels 223;

[0060] Step 5: Lay a widened road surface 300 with a seepage groove 230 on the first guide plate 210 and the fixing plate 221. Lay a waterproof layer 231 in the seepage groove 230. The upper surface of the waterproof layer 231 is on the same horizontal plane as the opening of the guide pipe 211. Lay permeable asphalt 232 on the waterproof layer 231 so that the bottom of the permeable asphalt 232 covers the waterproof layer 231 and the filter plate 212 in the guide pipe 211.

[0061] Step 7: Lay a widened embankment 400 on the widened road surface 300 and the fixing plate 221, and lay green vegetation on the widened embankment 400 to carry out greening operations and improve the environmental beautification effect.

[0062] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0063] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A seepage treatment structure for the slope of an old embankment used for widening highways, characterized in that, include: Permeable concrete (100), part of the slope at the bottom of the old embankment slope (10) is vertically leveled, and a layer of permeable concrete (100) is laid at the bottom of the old embankment slope (10). The upper surface of the permeable concrete (100) is inclined downward along the end away from the old embankment slope (10). A flow guiding assembly (200) includes a first flow guiding plate (210) and a second flow guiding plate (220). The first flow guiding plate (210) is disposed on the old embankment slope (10). The first flow guiding plate (210) is provided with a plurality of flow guiding pipes (211). The plurality of flow guiding pipes (211) are evenly distributed along the road extension direction and extend along the inclined direction of the old embankment slope (10). The second flow guiding plate (220) is disposed on the permeable concrete (100). The second flow guiding plate (220) is connected to the first flow guiding plate (210). A fixing plate (221) is disposed on the second flow guiding plate (220). The fixed plate (221) is connected to the first guide plate (210), and the fixed plate (221) and the second guide plate (220) enclose a drainage channel. The drainage channel is connected to a plurality of guide pipes (211). A plurality of support plates (222) are provided between the second guide plate (220) and the fixed plate (221). The plurality of support plates (222) are evenly distributed along the road extension direction. The support plates (222) extend along the inclined direction of the second guide plate (220) and divide the drainage channel into a plurality of drainage troughs (223). The support plates (222) are used to prevent the fixed plate (221) from deforming and collapsing. The road surface (300) is widened and covered on the first guide plate (210). The upper surface of the widened road surface (300) is on the same horizontal plane as the old road surface (20). The widened road surface (300) has a plurality of clearance grooves (310) on the side of the widened road surface (300) close to the first guide plate (210) to accommodate the guide pipe (211). A widened embankment (400) is provided on the fixing plate (221) and is connected to the widened road surface (300); The flow guiding component (200) further includes a seepage channel (230) and permeable asphalt (232). The seepage channel (230) is opened at the top of the widened road surface (300) along the road extension direction. The seepage channel (230) is connected to the first flow guiding plate (210). A waterproof layer (231) is provided in the seepage channel (230). The waterproof layer (231) is connected to the first flow guiding plate (210) and the widened road surface (300). The waterproof layer (231) is used to prevent water from seeping into the space between the first flow guiding plate (210) and the widened road surface (300). The permeable asphalt (232) is located in the seepage channel (230) and covers the top of the waterproof layer (231) and the flow guiding pipe (211).

2. The seepage treatment structure for the old embankment slope of a widened highway according to claim 1, characterized in that, The upper port of the guide pipe (211) is provided with a filter plate (212), which is used to prevent impurities from clogging the guide pipe (211).

3. The seepage treatment structure for the old embankment slope of a widened highway according to claim 1, characterized in that, The lower end of the guide pipe (211) is provided with a permeable cloth (213), which is located between the guide pipe (211) and the fixing plate (221). The permeable cloth (213) is used to prevent soil loss in the water.

4. The seepage treatment structure for the old embankment slope of a widened highway according to claim 1, characterized in that, The waterproof layer (231) is provided with a plurality of limiting grooves (231a) that allow the flow guide pipe (211) to pass through, and the plurality of limiting grooves (231a) correspond to the plurality of clearance grooves (310) respectively.

5. The seepage treatment structure for the old embankment slope of a widened highway according to claim 1, characterized in that, The inclination angle of the permeable concrete (100) is smaller than that of the old embankment slope (10).

6. A construction method for a seepage treatment structure for an old embankment slope of a widened highway, applied to the seepage treatment structure for an old embankment slope of a widened highway as described in any one of claims 1 to 5, characterized in that, include: Step 1: Clean up the construction area, remove any unnecessary debris and vegetation, and clean up the old embankment slope (10) until the loess is exposed; Step 2: Lay a layer of the permeable concrete (100) at the bottom of the old embankment slope (10). Step 3: Install the first guide plate (210) on the old embankment slope (10) and install the second guide plate (220) on the permeable concrete (100). Step 4: Install a plurality of the aforementioned guide pipes (211) on the first guide plate (210), and install the aforementioned fixing plate (221) and a plurality of the aforementioned support plates (222) on the second guide plate (220) to form a plurality of the aforementioned drainage channels (223), and lay a permeable cloth (213) between the guide pipes (211) and the drainage channels (223). Step 5: Lay the widened road surface (300) with the seepage groove (230) on the first guide plate (210) and the fixed plate (221), lay the waterproof layer (231) in the seepage groove (230), and lay the permeable asphalt (232) on the waterproof layer (231). Step 7: Lay the widened embankment (400) on the widened road surface (300) and the fixing plate (221), and lay green vegetation on the widened embankment (400).

7. The construction method for a seepage treatment structure for an old embankment slope of a widened highway according to claim 6, characterized in that, In step five, the upper surface of the waterproof layer (231) and the opening of the guide pipe (211) are on the same horizontal plane.

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