Subgrade slope drainage structure

Abstract

The present invention belongs to the technical field of road engineering and discloses a drainage structure for a subgrade slope, which includes a water-collecting curbstone, a drainage ditch, a chute and a plurality of water diversion structures. The water-collecting curbstone is located at the edge of the road surface of the subgrade, and a drainage port is arranged thereon; the drainage ditch is located at the bottom of the slope of the subgrade; the chute extends obliquely downward along the slope, with the top end communicating with the drainage port and the bottom end communicating with the drainage ditch. The chute is surrounded by a bottom plate and two side plates respectively arranged on both sides of the bottom plate; a plurality of water diversion structures are arranged on both side plates at intervals in sequence along the extension direction of the chute. One end of the water diversion structure is connected to the corresponding side plate, and the other end extends into the chute and has a gap with the inner side wall of the other side plate. The water diversion structures on the two side plates are arranged alternately in sequence along the extension direction of the chute, which can reduce the flow velocity and impact force of the water flow in the chute, avoid damaging the drainage ditch at the bottom of the slope, and can also serve as a maintenance ladderway at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of road engineering, and in particular to a drainage structure for a roadbed slope. Background Art

[0002] When a road is built, the filled roadbed is higher than the ground, forming a trapezoidal structure that is high in the middle and low on both sides. The middle part is paved with a road surface, and the two sides slope downwards to form slopes. The water on the road surface can flow down along the slope of the slope. During this process, rainwater will wash the soil on the surface of the slope, resulting in soil erosion of the slope, as well as a reduction in strength and stability, which can easily cause damage to the roadbed and even endanger driving safety.

[0003] To reduce the scouring of converging water and prevent soil erosion, drainage measures are generally taken for the slopes of the roadbed. The existing drainage structures for roadbed slopes often have a water retaining part extending along the edge of the road surface at the edge of the road surface. Drainage openings are provided on the water retaining part, so that the rainwater on the road surface can only be discharged from the drainage openings. A rapid flow channel is provided on the slope, which extends obliquely downwards from the top of the slope to the bottom of the slope. The top end of the rapid flow channel is connected to the drainage opening, and the bottom end is connected to a drainage ditch, so that the rainwater on the road surface can flow from the drainage opening to the rapid flow channel and finally flow into the drainage ditch along the rapid flow channel. Since the impact force of the water flowing out of the rapid flow channel is relatively large, the long-term strong impact force is likely to damage the drainage ditch at the bottom of the slope. Especially when the rainfall is too large and the converging water is too much, the water flow in the rapid flow channel is too fast, seriously affecting the service life of the drainage ditch.

[0004] Therefore, there is an urgent need for a drainage structure for a roadbed slope to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a drainage structure for a roadbed slope, which can reduce the flow velocity and impact force of the water flow in the rapid flow channel, avoid damaging the drainage ditch at the bottom of the slope, and extend the service life of the drainage ditch.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A drainage structure for a roadbed slope, characterized by comprising:

[0008] A water collecting curbstone, located at the edge of the road surface of the roadbed, and drainage openings are provided on the water collecting curbstone;

[0009] A drainage ditch, located at the bottom of the slope of the roadbed;

[0010] A rapid flow channel, extending obliquely downwards along the slope, the top end of the rapid flow channel is connected to the drainage opening, and the bottom end is connected to the drainage ditch. The rapid flow channel is surrounded by a bottom plate and two side plates respectively arranged on both sides of the bottom plate;

[0011] Multiple water diversion structures are provided on both side panels, and the water diversion structures are arranged in sequence and spaced apart along the extension direction of the rapid flow trough. One end of the water diversion structure is connected to the side panel corresponding thereto, and the other end extends into the rapid flow trough and is spaced apart from the inner side wall of the other side panel. The water diversion structures on the two side panels are arranged in sequence and staggered along the extension direction of the rapid flow trough.

[0012] Preferably, each of the side panels is provided with a plurality of plug-in holes, and each of the plug-in holes is connected to a corresponding water diversion structure.

[0013] Preferably, a thickened portion is provided on the side panel corresponding to each of the plug-in holes, and the plug-in holes are opened on the corresponding thickened portions.

[0014] Preferably, the water diversion structure includes a water diversion plate and a limiting plate, the limiting plate is connected to one end of the water diversion plate, the other end of the water diversion plate extends into the rapid flow trough through the plug hole, and the limiting plate abuts against the outer wall of the side plate.

[0015] Preferably, the water diversion plate includes a water diversion part and a stop part, one end of the water diversion part is connected to the limiting plate, one side of the water diversion part is abutted against the bottom plate, and the stop part is protruding from the upper surface of the water diversion part and is located at the other side edge of the water diversion part.

[0016] Preferably, the upper surface of the water diversion portion gradually decreases in height from an end close to the limit plate to an end away from the limit plate, and gradually decreases in height from an end close to the stop portion to an end away from the stop portion.

[0017] Preferably, a plurality of guide grooves spaced apart in sequence are provided on the upper surface of the water diversion portion, and the guide grooves extend from an end close to the limit plate to an end away from the limit plate.

[0018] Preferably, the distance between the guide groove and the bottom plate gradually decreases from an end close to the limiting plate to an end away from the limiting plate.

[0019] Preferably, the water diversion structure further comprises a soil fixing plate, which is connected to an end of the limiting plate away from the water diversion plate and is configured to be buried in the soil of the slope.

[0020] Preferably, a plurality of anti-skid steps are protruding from the back side of the base plate and are sequentially spaced along the extension direction of the rapids trough, and the anti-skid steps are embedded in the soil of the slope.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a subgrade slope drainage structure. A plurality of water diversion structures of the subgrade slope drainage structure are arranged at intervals and staggered in sequence along the extension direction of the chute. Among any two adjacent water diversion structures, one is connected to the left side plate, extends into the chute, and has a gap with the inner side wall of the right side plate, and the other is connected to the right side plate, extends into the chute, and has a gap with the inner side wall of the left side plate. Therefore, the plurality of water diversion structures divide the chute to form a meandering curve-shaped water flow channel, effectively extending the flow path of the water flow. The water flow in the chute flows down in a left-right cycle along the water diversion structures to the drainage ditch at the bottom of the slope, rather than directly rushing into the drainage ditch, which is beneficial to reducing the flow velocity and impact force of the water flow in the chute, avoiding damaging the drainage ditch at the bottom of the slope, and extending the service life of the drainage ditch. At the same time, the plurality of water diversion structures can also serve as inspection ladders, facilitating the walking of workers when inspecting and maintaining the slope, chute and drainage ditch, and being beneficial to ensuring the safety of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the front view of the subgrade slope drainage structure provided by an embodiment of the present invention;

[0024] Figure 2 is the side view of the subgrade slope drainage structure provided by an embodiment of the present invention;

[0025] Figure 3 is the partial schematic view of the chute provided by an embodiment of the present invention;

[0026] Figure 4 is the structural schematic view of the water diversion structure provided by an embodiment of the present invention.

[0027] In the figure:

[0028] 1, catch water kerb;

[0029] 2, drainage ditch;

[0030] 3, chute; 31, side plate; 311, insertion hole; 312, thickened part; 32, bottom plate; 321, anti-slip step;

[0031] 4, water diversion structure; 41, water diversion plate; 411, water diversion part; 4111, diversion groove; 412, stop part; 42, limit plate; 43, soil fixing plate;

[0032] 5, drop well;

[0033] 6, gravel;

[0034] 100, road surface;

[0035] 200, slope. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0037] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0039] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0040] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0041] This embodiment provides a subgrade slope drainage structure, specifically refer to Figures 1-4 , which can extend the flow path of the water flow in the chute 3, reduce the flow velocity of the water flow, slow down the impact force of the water flow, avoid damaging the drainage ditch 2 at the bottom of the slope, and extend the service life of the drainage ditch 2.

[0042] The subgrade slope drainage structure includes a water collecting curb 1, a drainage ditch 2, a chute 3 and a plurality of water diversion structures 4. The water collecting curb 1 is located at the edge of the road surface 100 of the subgrade, and a drainage opening is provided on the water collecting curb 1. The drainage ditch 2 is located at the bottom of the slope 200 of the subgrade. The chute 3 extends obliquely downward along the slope 200. The top end of the chute 3 is connected to the drainage opening, and the bottom end is connected to the drainage ditch 2. The chute 3 is formed by a bottom plate 32 and two side plates 31 respectively arranged on both sides of the bottom plate 32. A plurality of water diversion structures 4 are arranged on both side plates 31 at intervals in sequence along the extending direction of the chute 3. One end of the water diversion structure 4 is connected to the corresponding side plate 31, and the other end extends into the chute 3 and has a gap with the inner side wall of the other side plate 31. The water diversion structures 4 on the two side plates 31 are arranged alternately in sequence along the extending direction of the chute 3.

[0043] Figure 1 In the chute 3, the direction of the arrow represents the flow direction of the water flow in the chute 3, and in the drainage ditch 2, the direction of the arrow represents the flow direction of the water flow in the drainage ditch 2. In rainy weather, the rainwater on the road surface 100 flows towards the edge of the road surface 100, is diverted along the water collecting curb 1 to the drainage opening, then flows from the drainage opening to the chute 3, and finally flows into the drainage ditch 2 at the bottom of the slope along the chute 3, so that the rainwater is discharged from the subgrade, avoiding the rainwater flowing down from the road surface 100 from scouring the soil on the surface of the slope 200, thereby being beneficial to preventing soil erosion of the slope 200, maintaining the strength and stability of the slope 200, and ensuring driving safety.

[0044] In addition, a plurality of water diversion structures 4 are arranged at intervals and alternately in sequence along the extending direction of the chute 3. Among any two adjacent water diversion structures 4, one is connected to the left side plate 31, extends into the chute 3, and has a gap with the inner side wall of the right side plate 31, and the other is connected to the right side plate 31, extends into the chute 3, and has a gap with the inner side wall of the left side plate 31. Therefore, a plurality of water diversion structures 4 divide the chute 3 to form a meandering curve-shaped water flow channel, effectively extending the flow path of the water flow. The water flow in the chute 3 flows down in a left-right cycle along the water diversion structures 4 to the drainage ditch 2 at the bottom of the slope, rather than directly flushing into the drainage ditch 2, which is beneficial to reducing the flow velocity and impact force of the water flow in the chute 3, avoiding damaging the drainage ditch 2 at the bottom of the slope, and extending the service life of the drainage ditch 2. At the same time, a plurality of water diversion structures 4 can also serve as inspection ladders, facilitating the walking of the staff when inspecting and maintaining the slope 200, the chute 3 and the drainage ditch 2, and being beneficial to ensuring the safety of the staff.

[0045] Preferably, as Figure 1As shown, the water diversion structure 4 is arranged in a horizontal state, that is, one end of the water diversion structure 4 is connected to the corresponding side plate 31, and the other end is located in the rapid flow channel 3 and extends along the horizontal direction, so that the staff can walk or stand stably on the water diversion structure 4, avoiding slipping, thus further ensuring the safety of the staff and being more conducive to the staff using multiple water diversion structures 4 as maintenance ladders.

[0046] Specifically, as Figure 2 shown, since the side plate 31 is arranged obliquely along the extension direction of the rapid flow channel 3, the length direction of the side plate 31 is the extension direction of the rapid flow channel 3, that is, the inclination direction of the slope 200. Therefore, to ensure that the water diversion structure 4 is in a horizontal state, the water diversion structure 4 needs to be vertically arranged on the side plate 31 and at a certain angle with the length direction of the side plate 31. The specific angle is the same as the inclination angle of the slope of the slope 200.

[0047] In this embodiment, both the side plate 31 and the bottom plate 32 of the rapid flow channel 3 are made of cement concrete composite materials, which can be directly cast by a mold. The construction process is simple, the economic benefit is high, and the stability and durability are good. Exemplarily, C25 cement concrete is selected. The water diversion structure 4 is made of reinforced concrete composite materials, which has higher strength than cement concrete, good compressive and flexural resistance, and can withstand the impact of water flow. Exemplarily, C30 reinforced concrete is selected.

[0048] Further, a plurality of insertion holes 311 are formed in each side plate 31, and each insertion hole 311 is correspondingly inserted with a water diversion structure 4. That is, a plurality of insertion holes 311 are arranged on both side plates 31 at intervals in sequence along the extension direction of the rapid flow channel 3, and the insertion holes 311 on the two side plates 31 are arranged alternately in sequence along the extension direction of the rapid flow channel 3. The water diversion structure 4 is inserted into the insertion holes 311, realizing the detachable connection between the water diversion structure 4 and the side plate 31, which is convenient for installation and disassembly and maintenance. At the same time, the separate processing of the rapid flow channel 3 and the water diversion structure 4 can be realized, and the water diversion structure 4 can be prefabricated in advance and then installed on site, which is beneficial to improving the construction speed.

[0049] In this embodiment, as Figure 2 and Figure 3 shown, the insertion hole 311 is arranged at an angle with the length direction of the side plate 31, and the specific angle of the angle is the same as the inclination angle of the slope of the slope 200, so that after the side plate 31 is arranged obliquely along the slope 200, the insertion hole 311 can extend along the horizontal direction, so that the water diversion structure 4 can extend along the horizontal direction.

[0050] Further, as Figure 3As shown, in order to compensate for the loss of strength of the side plate 31 caused by the insertion holes 311 formed on the side plate 31, a thickening portion 312 is provided on the side plate 31 corresponding to each insertion hole 311, and the insertion hole 311 is formed on the corresponding thickening portion 312. The thickening portion 312 thickens the thickness of the side plate 31 at the insertion hole 311, thereby improving the strength of the side plate 31 at the insertion hole 311 and making it not easily damaged when subjected to the shearing force of the water diversion structure 4. At the same time, the setting of the thickening portion 312 can also widen the width of the insertion hole 311 along the thickness direction of the side plate 31, thereby increasing the contact area between the water diversion structure 4 and the side plate 31, which is beneficial to the stable connection between the water diversion structure 4 and the side plate 31.

[0051] In this embodiment, the thickening portion 312 is a convex structure on the surface of the side plate 31. The thickening portion 312 is integrally cast with the side plate 31, and the insertion hole 311 is directly formed through a reserved hole on the mold during casting, thereby effectively improving the construction speed, saving construction costs, and the integral casting method ensures the strength of the side plate 31. Further, to save material costs, the cross-section of the thickening portion 312 is trapezoidal, with the small-diameter end of the trapezoid close to the opening of the insertion hole 311 and the large-diameter end connected to the side wall of the side plate 31. Of course, in other embodiments, the cross-section of the thickening portion 312 can also be rectangular or fan-shaped, not limited to the solution provided in this embodiment.

[0052] Further, as Figure 1 and Figure 4 shown, the water diversion structure 4 includes a water diversion plate 41 and a limiting plate 42. The limiting plate 42 is connected to one end of the water diversion plate 41. The other end of the water diversion plate 41 extends into the rapid flow channel 3 through the insertion hole 311, and the limiting plate 42 abuts against the outer side wall of the side plate 31. The setting of the limiting plate 42 determines the position of the water diversion plate 41 on the side plate 31 and plays a role in fixing the water diversion structure 4.

[0053] Since the insertion hole 311 is horizontally arranged and the water diversion plate 41 is perpendicular to the side plate 31 after being inserted into the insertion hole 311, preferably, the limiting plate 42 is perpendicular to the water diversion plate 41 so that the limiting plate 42 can be completely attached to the outer side wall of the side plate 31, thereby further increasing the contact area between the water diversion structure 4 and the side plate 31 and strengthening the stability of the connection between the water diversion structure 4 and the side plate 31.

[0054] In this embodiment, the thickening portion 312 protrudes from the inner side wall of the side plate 31, which is convenient for the limiting plate 42 to abut against the outer side wall of the side plate 31. Of course, in other embodiments, the thickening portion 312 can also protrude from the outer side wall of the side plate 31, and the limiting plate 42 abuts against the thickening portion 312, or thickening portions 312 are provided on both the inner side wall and the outer side wall of the side plate 31 protruding.

[0055] Further, asFigure 4 As shown, the water diversion plate 41 includes a water diversion portion 411 and a stopper portion 412. One end of the water diversion portion 411 is connected to the limit plate 42, and one side of the water diversion portion 411 abuts the bottom plate 32. The stopper portion 412 protrudes from the upper surface of the water diversion portion 411 and is located at the other side edge of the water diversion portion 411. Because the rapid flow trough 3 is inclined, the water in the rapid flow trough 3 flows along the surface of the bottom plate 32, abutting one side of the water diversion portion 411 against the bottom plate 32. This improves the water diversion and force dissipation effects of the water diversion portion 411 and prevents a portion of the water in the rapid flow trough 3 from flowing away through the gap between the water diversion portion 411 and the bottom plate 32, thereby failing to mitigate the impact force of this portion of the water flow. The setting of the stopper 412 can prevent the water on the water diversion part 411 from flowing out from the side away from the bottom plate 32. The front and rear sides of the water diversion part 411 are stopped by the stopper 412 and the bottom plate 32 respectively, and one end is stopped by the side plate 31 connected to it. Therefore, the water on the water diversion part 411 can only flow out in the direction of the side plate 31 spaced apart from it, thereby diverting more water to the water diversion part 411 of the next water diversion structure 4, realizing the layered force dissipation of the water flow in the rapids trough 3 by multiple water diversion structures 4.

[0056] Correspondingly, since the water guide plate 41 in this embodiment extends from the outside of the rapid flow trough 3 through the plug hole 311 into the rapid flow trough 3, the cross section of the plug hole 311 should be consistent with the cross section of the water guide plate 41. Figure 3 As shown, in order for the water guide portion 411 to abut against the bottom plate 32 , the end of the insertion hole 311 close to the bottom plate 32 needs to extend to the surface of the bottom plate 32 .

[0057] Furthermore, the upper surface of the water diversion portion 411 gradually decreases in height from the end close to the limiting plate 42 to the end away from the limiting plate 42, and also gradually decreases in height from the end close to the stopper 412 to the end away from the stopper 412. This arrangement allows water on the water diversion portion 411 to flow toward the end away from the limiting plate 42 and the end away from the stopper 412, that is, toward the corner of the water diversion portion 411 away from the limiting plate 42 and close to the bottom plate 32, thereby allowing the water to flow obliquely downward along the bottom plate 32 to the water diversion portion 411 of the next water diversion structure 4, thereby reducing the impact force of the water flow on the water diversion structure 4 and preventing the water diversion structure 4 from being damaged.

[0058] Furthermore, the upper surface of the water diversion portion 411 is provided with a plurality of sequentially spaced diversion grooves 4111, which extend from the end proximate to the limiting plate 42 to the end facing away from the limiting plate 42. The plurality of diversion grooves 4111 give the upper surface of the water diversion portion 411 an undulating texture, providing a non-slip surface for workers walking on it. The diversion grooves 4111 extend from the end proximate to the limiting plate 42 to the end facing away from the limiting plate 42, cooperating with the gradually decreasing height of the upper surface of the water diversion portion 411 from the end proximate to the limiting plate 42 to the end facing away from the limiting plate 42, thereby better directing water from the water diversion portion 411 toward the next water diversion portion 411.

[0059] Furthermore, the distance between the guide groove 4111 and the bottom plate 32 gradually decreases from the end close to the limit plate 42 to the end away from the limit plate 42. This structural setting is coordinated with the upper surface of the water diversion part 411 gradually decreasing in height from the end close to the stop part 412 to the end away from the stop part 412, thereby better diverting the water on the water diversion part 411 toward a corner away from the limit plate 42 and close to the bottom plate 32, further promoting the water flow of the water diversion part 411 to flow along the bottom plate 32 to the water diversion part 411 of the next water diversion structure 4, reducing the impact force of the water flowing out of the previous water diversion structure 4 on the next water diversion structure 4.

[0060] Furthermore, the water diversion structure 4 includes a soil-stabilizing plate 43 connected to the end of the limiting plate 42 facing away from the water diversion plate 41 and configured to be buried in the soil of the slope 200. The soil-stabilizing plate 43 provides support for the soil of the slope 200 on both sides of the rapids trough 3, effectively consolidating the soil, strengthening the stability of the slope 200, and preventing soil erosion on the slope 200.

[0061] In this embodiment, the soil fixing plate 43 and the water diversion plate 41 are located on the same horizontal plane, and the soil fixing plate 43 is also arranged vertically with the limiting plate 42. The water diversion structure 4 is formed by the water diversion plate 41, the limiting plate 42 and the soil fixing plate 43 to form a cross-shaped structure, thereby facilitating the processing of the water diversion structure 4.

[0062] Due to the setting of the soil-fixing plate 43, when the water diversion structure 4 is plugged into the side plate 31, the soil-fixing plate 43 can also be extended from the inner side of the rapid trough 3 through the plug-in hole 311 to the outside of the rapid trough 3, and the limiting plate 42 abuts against the inner wall of the side plate 31. At this time, the cross-section of the plug-in hole 311 should be consistent with the cross-section of the soil-fixing plate 43.

[0063] Furthermore, if Figure 2As shown, since the bottom plate 32 of the chute 3 is inclined along the slope surface of the slope 200, in order to more stably fix the position of the chute 3 and prevent the chute 3 from sliding along the slope 200, a plurality of anti-slip steps 321 are protruding on the back surface of the bottom plate 32 and are arranged at intervals in sequence along the extension direction of the chute 3, and the anti-slip steps 321 are embedded in the soil body of the slope 200. Preferably, the bottom surface of the anti-slip step 321 is horizontally arranged.

[0064] Furthermore, as Figure 2 and Figure 3 shown, a layer of gravel 6 is also laid between the bottom plate 32 and the slope 200 as a cushion layer, which is beneficial to improving the bearing capacity of the slope 200 for the chute 3.

[0065] The part where the slope surface of the slope 200 intersects with the bottom of the slope is the toe of the slope. In actual construction, the drainage ditch 2 is often built at the bottom of the slope at a certain distance from the toe of the slope. Therefore, as Figure 1 and Figure 2 shown, the roadbed slope drainage structure is also provided with a drop well 5. The drop well 5 is located at the toe of the slope 200. One end of the drop well 5 communicates with the bottom end of the chute 3, and the other end communicates with the drainage ditch 2.

[0066] Since the water in the chute 3 is dissipated layer by layer through a plurality of water diversion structures 4, there is no need to set a dissipating device in the drop well 5, and it only needs to play the role of connecting the chute 3 and the drainage ditch 2, which is beneficial to cost savings. At the same time, the water diversion structure 4 also plays a role in protecting the drop well 5 and preventing the drop well 5 from being washed out.

[0067] In this embodiment, the vertical interval between two adjacent socket holes 311 on the side plate 31 is 50 cm - 100 cm. The end of the socket hole 311 facing away from the bottom plate 32 is 5 cm lower than the top end of the side plate 31. The vertical interval between two adjacent anti-slip steps 321 on the back surface of the bottom plate 32 is 150 - 250 cm. The specific arrangement interval and arrangement position of the socket holes 311 and the anti-slip steps 321 are specifically set according to the actual situation, and are not limited to the scheme listed in this embodiment.

[0068] In the specific construction process, first, a foundation pit is dug along the slope 200, then a layer of gravel 6 is laid in the foundation pit as a cushion layer, and then the formwork of the chute body of the catch water chute 3 is set up, and the insertion holes 311 are reserved; after the formwork is installed and inspected qualified, C25 cement concrete is poured into the formwork, vibrated and compacted, and then cured. After the cement concrete solidifies to reach the qualified strength, the formwork is removed, and then the prefabricated water diversion structure 4 is inserted into the multiple insertion holes 311 of the two side plates 31 one by one, so that the water diversion plate 41 is located inside the catch water chute 3, and the soil fixing plate 43 is located outside the catch water chute 3. Subsequently, the soil on both sides of the slope 200 of the catch water chute 3 is backfilled, so that the soil fixing plate 43 is buried in the soil and manually tamped. Thus, the construction of the roadbed slope drainage structure is completed, and the construction process is simple and fast.

[0069] It should be noted that the roadbed slope drainage structure described in this embodiment is only one drainage structure in the slope 200. In practical applications, multiple roadbed slope drainage structures should be arranged at intervals along the extension direction of the roadbed on both sides of the roadbed. Specifically, there are multiple drainage outlets on the water collecting curb 1, multiple catch water chutes 3, and multiple drop wells 5, and they correspond to each other one by one. The drainage ditch 2 extends along the roadbed, and multiple catch water chutes 3 on the same side slope 200 are all connected to the same drainage ditch 2. The interval between two adjacent catch water chutes 3 on the same side slope 200 is preferably 50m - 100m, which is specifically determined according to the rainfall and the water collection volume in the catch water chute 3. For example, when the rainfall is the same, the wider the road surface 100 is, the larger the water collection area is, and the smaller the interval between two adjacent catch water chutes 3 should be to ensure that the water collection volume in the catch water chute 3 will not be too large.

[0070] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Subgrade slope drainage structure, characterized in that, Comprising: A catch water kerb (1) located at the edge of the road surface (100) of the roadbed, and a drain outlet is provided on the catch water kerb (1); A drainage ditch (2) located at the bottom of the slope (200) of the roadbed; A chute (3) extending obliquely downwards along the slope (200), the top end of the chute (3) being communicated with the drain outlet and the bottom end being communicated with the drainage ditch (2), and the chute (3) being formed by a bottom plate (32) and two side plates (31) respectively arranged on both sides of the bottom plate (32); A plurality of water diversion structures (4), and a plurality of the water diversion structures (4) are arranged at intervals in sequence along the extension direction of the chute (3) on both of the two side plates (31). One end of the water diversion structure (4) is connected to the corresponding side plate (31), the other end extends into the chute (3), and has a gap with the inner side wall of the other side plate (31), and the water diversion structures (4) on the two side plates (31) are arranged in a staggered manner in sequence along the extension direction of the chute (3); A plurality of insertion holes (311) are formed on each of the side plates (31), and each of the insertion holes (311) is correspondingly inserted with one of the water diversion structures (4); The water diversion structure (4) includes a water diversion plate (41) and a limiting plate (42), the limiting plate (42) is connected to one end of the water diversion plate (41), the other end of the water diversion plate (41) extends into the chute (3) through the insertion hole (311), and the limiting plate (42) abuts against the outer side wall of the side plate (31); The water diversion plate (41) includes a water diversion portion (411) and a stop portion (412), one end of the water diversion portion (411) is connected to the limiting plate (42), one side of the water diversion portion (411) abuts against the bottom plate (32), and the stop portion (412) protrudes from the upper surface of the water diversion portion (411) and is located at the other side edge of the water diversion portion (411); The upper surface of the water diversion portion (411) gradually decreases in height from the end close to the limiting plate (42) to the end away from the limiting plate (42), and also gradually decreases in height from the end close to the stop portion (412) to the end away from the stop portion (412); A plurality of diversion grooves (4111) are arranged at intervals in sequence on the upper surface of the water diversion portion (411), and the diversion grooves (4111) extend from the end close to the limiting plate (42) to the end away from the limiting plate (42); 2. The subgrade slope drainage structure according to claim 1, characterized in that, A thickening portion (312) is provided on the side plate (31) corresponding to each of the insertion holes (311), and the insertion hole (311) is formed on the corresponding thickening portion (312); 3. The roadbed slope drainage structure according to claim 1, characterized in that The distance between the diversion groove (4111) and the bottom plate (32) gradually decreases from the end close to the limiting plate (42) to the end away from the limiting plate (42).

4. The subgrade slope drainage structure according to claim 1, characterized in that, The water diversion structure (4) further comprises a soil fixing plate (43), wherein the soil fixing plate (43) is connected to an end of the limiting plate (42) facing away from the water diversion plate (41) and is configured to be buried in the soil of the slope (200).

5. The roadbed slope drainage structure according to any one of claims 1-4, characterized in that, A plurality of anti-skid steps (321) are protrudingly provided on the back side of the bottom plate (32) and are sequentially spaced along the extension direction of the rapids trough (3). The anti-skid steps (321) are embedded in the soil of the slope (200).

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