Road slope protection structure suitable for tropical rainy climate and slope protection method

Abstract

The invention relates to the technical field of road slope protection structures, in particular to a road slope protection structure suitable for tropical rainy climate and a slope protection method. Comprising a road body, soil retaining components and a protection slope body, the road body is composed of a cushion layer, a base layer and an impermeable surface layer, the soil retaining components with water collecting grooves and water storage cavities are arranged on the two sides of the road body, road surface runoff and slope body seepage water are collected through drainage holes, and a drainage pipe assembly in each water storage cavity can achieve bidirectional regulation and control according to the humidity of a fill stratum. The anti-seepage bottom layer prevents rainwater from infiltrating into an undisturbed soil base, soil body softening landslide is avoided, the stability of the soil retaining component is enhanced through the base anchor rod, the detachable cover plate facilitates maintenance of the structure, slope stability and ecological protection are considered through dynamic water management, and the structure adapts to the dry-wet alternation characteristic of the tropical rainy climate.

Description

Technical Field

[0001] The present invention relates to the technical field of highway slope protection structures, and in particular to a highway slope protection structure and a slope protection method suitable for tropical rainy climates. Background Art

[0002] In tropical rainy climate zones, highway slopes are constantly threatened by erosion and infiltration from high-intensity rainfall. The concentrated and intense rainfall in this region can lead to saturation of the slope soil, increase its deadweight, and cause a decrease in shear strength, which in turn can trigger disasters such as landslides and collapses. At the same time, road runoff and slope seepage can exacerbate roadbed softening, affecting the safety and service life of highway structures. Therefore, a highway slope protection structure suitable for tropical rainy climates is urgently needed to address the above-mentioned issues. Summary of the Invention

[0003] To overcome the deficiencies of the above-mentioned prior art, the present invention provides a highway slope protection structure and slope protection method suitable for tropical rainy climates, which solves the technical problems that precipitation in tropical rainy areas is concentrated and intense, causing slopes to easily slide and collapse, and softening the roadbed and shortening the service life of the road under the dual effects of surface runoff and slope seepage.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions: A highway slope protection structure suitable for tropical rainy climates, comprising: An original soil base, on which a road body is arranged, the road body comprising, from bottom to top, a cushion layer, a base layer, and an impermeable surface layer; A pair of retaining members, wherein the pair of retaining members are arranged on both sides of the road body in the transverse direction of the road, and the pair of retaining members are arranged to extend longitudinally along the road body, the retaining members comprising: a base, a water collecting trough with an open upper end, a plurality of drainage holes provided on the side walls of the water collecting trough, the drainage holes being used to collect water outside the water collecting trough, the base being embedded in the original soil foundation, the water collecting trough being arranged on the base, the base comprising: a water storage cavity, the water storage cavity being in communication with the water collecting trough; A protective slope body is provided on the side of the retaining member away from the road body. The protective slope body includes, from bottom to top, an anti-seepage bottom layer, a fill layer, and a vegetation layer. The water storage cavity is provided with a drainage pipe assembly, which extends axially into the fill layer. The drainage pipe assembly is used to introduce water in the fill layer into the water storage cavity, and to transport moisture to the fill layer when the fill layer is dry.

[0005] Based on the above structure, the principle of the highway slope protection structure suitable for tropical rainy climate is as follows: when it rains, since the impermeable surface layer is made of impermeable material, the surface rainwater on the side of the road body will flow into the water collection trough through the drainage holes on the side wall of the trough. Since the water storage cavity is connected to the trough, the rainwater will eventually flow into the water storage cavity; and for the rainwater on the side of the protective slope, the vegetation layer will first intercept part of the rainwater, slowing down the slope runoff speed. The rainwater that is not intercepted will form runoff along the surface of the fill layer, part of which will penetrate into the interior of the fill layer, and the other part will flow into the water collection trough through the drainage holes of the protective slope body and be collected in the water storage cavity. Internal storage: when the water content of the fill layer is too high, the drainage pipe assembly will introduce the moisture in the fill layer into the water storage chamber to reduce the soil saturation and prevent the slope soil of the protective slope from being too wet and unstable; when the fill layer is in a dry state, the rainwater in the water storage chamber can be transported back to the fill layer through the drainage pipe assembly to provide irrigation water for the vegetation layer, realize the recycling of water resources, ensure the slope protection effect, and prevent the slope from being unstable; the anti-seepage bottom layer is used to block the rainwater from continuing to seep from the fill layer, resulting in an increase in the water content in the original soil base, an increase in the deadweight of the soil, and a decrease in the shear strength, thereby avoiding damage to the roadbed and improving the service life of the road.

[0006] Furthermore, in a highway slope protection structure suitable for use in tropical, rainy climates, the present application provides a first filter layer disposed between the retaining member and the protective slope. The first filter layer is disposed on the outside of the drainage holes on the side of the protective slope, and the first filter layer extends longitudinally along the road surface. As a preferred embodiment of the present application, the present invention provides a highway slope protection structure suitable for use in tropical, rainy climates. The first filter layer is configured to allow water to flow through the drainage holes while intercepting larger solid impurities in the fill layer, thereby preventing clogging of the drainage holes and ensuring unobstructed drainage.

[0007] Furthermore, in a highway slope protection structure suitable for use in tropical rainy climates, the present application provides a second filter layer between the impermeable surface layer and the retaining member, the second filter layer being disposed on the outside of the drainage holes on the road side, the second filter layer being embedded in the sidewalls of the retaining member, and the second filter layer extending vertically beyond the impermeable surface layer. As a preferred embodiment of the present application, in a highway slope protection structure suitable for use in tropical rainy climates, the second filter layer is used to prevent sand, gravel, and other debris on the impermeable surface layer from entering the sump through the drainage holes on the road side and causing blockage.

[0008] Furthermore, the present application provides a highway slope protection structure suitable for use in tropical rainy climates, wherein the drainage pipe assembly comprises: an inner pipe having a plurality of drainage holes arranged in a spiral arrangement along the axial direction of the inner pipe; a porous clay pipe sleeved on the outer side of the inner pipe; a third filter layer disposed between the porous clay pipe and the inner pipe; and the third filter layer covering the outer side of the inner pipe. As a preferred embodiment of the present application, the present invention provides a highway slope protection structure suitable for use in tropical rainy climates, wherein the porous clay pipe is made of a porous material having a large number of tiny pores therein forming "micro-capillaries." When heavy rain continues and the fill layer becomes saturated with water, the saturated water, under the action of gravity, freely enters the inner pipe along the pores of the porous clay pipe and the third filter layer and flows into the water storage chamber. When a continuous water flow forms in the inner pipe, the drainage holes arranged in a spiral arrangement along the axial direction of the inner pipe accelerate the flow collection, promoting a siphon effect within the inner pipe, and further drawing out the saturated water from the fill layer, thereby preventing water accumulation in the fill layer from causing root hypoxia and rot in the anti-seepage bottom layer. When the fill layer is dry, the humidity of the fill layer is lower than that of the drainage pipe assembly. Water actively rises along the axial direction of the porous clay pipe through capillary action in the tiny pores of the porous clay pipe and seeps out of the surface. After seeping through the porous clay pipe, the water diffuses into the dry fill layer, continuously replenishing moisture for the anti-seepage bottom layer. Relying on the capillary action and gravity flow physical principles of the porous clay pipe, and working in conjunction with the water storage cavity, adaptive humidity regulation is achieved, which reduces the risk of soil erosion on the protective slope and helps maintain the stability of the protective slope. The third filter layer is used to block fine particles in the water and prevent the drainage holes from being blocked.

[0009] Furthermore, in a highway slope protection structure suitable for use in tropical rainy climates, the present application provides a structure having two sets of anchor rods at the bottom of the base. The two sets of anchor rods are spaced apart in the transverse direction of the road, and one set of anchor rods is evenly spaced apart in the longitudinal direction of the road. As a preferred embodiment of the present application, the present invention provides a highway slope protection structure suitable for use in tropical rainy climates. The anchor rods are used to ensure the stability of the retaining member, preventing the base from being lifted by buoyancy. Furthermore, when the fill layer is saturated with water, the anchor rods resist the active earth pressure of the fill layer, preventing the retaining member from horizontal displacement.

[0010] Furthermore, the present application provides a highway slope protection structure suitable for tropical rainy climates, wherein the upper opening of the water collection trough is provided with a cover assembly, wherein the cover assembly is detachably mounted at the upper opening of the water collection trough, and wherein the cover assembly includes a mounting seat, wherein both inner side walls of the water collection trough are provided with notches, and when the cover assembly is mounted at the upper opening of the water collection trough, the mounting seat abuts against the bottom and side walls of the notches in the vertical and horizontal directions. As a preferred embodiment of the present application, the present invention provides a highway slope protection structure suitable for tropical rainy climates, wherein the cover assembly is used to protect the water collection trough to prevent debris such as mud, sand, and fallen leaves from falling into the water collection trough, and the design of the notches facilitates quick positioning and stable bearing of the mounting seat during installation; at the same time, the detachable mounting seat also facilitates the cleaning of debris such as mud, sand, and fallen leaves accumulated in the water collection trough.

[0011] Furthermore, the present application provides a road slope protection structure suitable for tropical rainy climates, wherein the mounting seat comprises: a cavity with an upper opening, a plurality of water flow holes provided at the bottom of the mounting seat, the water flow holes being spaced apart along the longitudinal and transverse directions of the road, the water flow holes being connected to the cavity, a filter body being provided in the cavity, the filter body being covered on the water flow holes, a cover plate being provided at the upper opening of the cavity, and the cover plate being detachably mounted on the mounting seat. As a preferred embodiment of the present application, the present invention provides a road slope protection structure suitable for tropical rainy climates, wherein the filter body is used to filter sewage that falls into the cavity, to prevent debris such as leaves and fine gravel from clogging the water flow holes, and at the same time, to prevent debris such as leaves and fine gravel from flowing into the sump; the cover plate is detachably designed to facilitate cleaning of the cavity and replacement of the filter body.

[0012] A slope protection method for a highway slope protection structure suitable for tropical rainy climates includes the following dynamic adjustment process: Rainwater collection stage: Surface runoff on the road side is filtered by the second filter layer and then flows into the water collection tank through the corresponding drainage holes and then into the water storage cavity for storage. Surface runoff on the protection slope side is intercepted and slowed down by the vegetation layer, and part of the rainwater infiltrates into the fill layer. The rest of the runoff is filtered by the first filter layer and then flows into the water storage cavity through the corresponding drainage holes. Saturated drainage stage: When the water content in the fill layer is saturated, the water penetrates through the pores of the porous clay pipe, is filtered by the third filter layer, and then converges through the spiral drainage holes of the inner pipe. It is then siphoned into the water storage cavity through the drainage pipe assembly, reducing the soil saturation in the fill layer. Drought water supply stage: When the fill layer is dry, the water stored in the water storage cavity is reversely transmitted through the drainage pipe assembly, and rises and seeps out with the help of the capillary action of the porous clay pipe, continuously moistening the fill layer and replenishing the vegetation layer; Anti-seepage stabilization mechanism: The anti-seepage bottom layer blocks water from seeping into the original soil foundation, preventing the reduction of the shear strength of the original soil foundation. The anchor rods resist the active earth pressure when the fill layer is saturated and the buoyancy of the water storage cavity, maintaining the stability of the retaining structure. Maintenance operation: Regularly remove the cover to clean the filter body and silt in the sump to ensure that the drain holes and drainage pipe components are unobstructed.

[0013] A construction method for a highway slope protection structure suitable for tropical rainy climates comprises the following steps: S1, clean up the debris on the original soil foundation surface and trim the slope to the designed slope; S2: construct anchor rods at preset intervals, pour concrete base, and reserve installation locations for drainage pipe components; S3, construct a water collection tank on the base, connect the water storage cavity with the water collection tank, reserve drainage holes at the preset positions, and install the drainage pipe assembly to the designed depth of the fill layer; S4: When the retaining structure reaches the design strength, the cushion layer and base layer are laid in layers on the road side and compacted to the design compaction degree. The second filter layer is embedded in the groove on the side wall of the retaining structure, and the impermeable surface layer is laid, and the joint with the second filter layer is sealed. On the slope side, the anti-seepage base layer is laid, the first filter layer is constructed, and the fill layer is backfilled in layers and compacted. Green plants are planted on the top of the fill layer to form a vegetation layer. S5, insert the mounting seat into the missing part, fill the filter body into the cavity, add the cover plate, and complete the construction.

[0014] In step S4, the impermeable surface layer is laid after the backfill layer is completed.

[0015] It can be seen from the above technical solution that the present invention has the following beneficial effects: The present invention provides a highway slope protection structure and slope protection method suitable for tropical rainy climates. By setting retaining members on both sides of the road body, the drainage holes on the side walls of the water collection trough are used to simultaneously collect rainwater from the impermeable surface layer of the road and rainwater from the side seepage of the protection slope. After being stored in the water storage cavity, the capillary action of the porous clay tubes of the drainage pipe assembly and the physical mechanism of gravity flow are used to achieve two-way regulation of the water content of the fill layer. That is, during heavy rain, the spiral drainage holes are used to accelerate siphon drainage to reduce the soil saturation and prevent the slope from sliding due to excessive moisture; during drought, Water seeps through the pores of porous clay tubes to irrigate the vegetation layer, ensuring the ecological protection effect. At the same time, the anti-seepage bottom layer effectively blocks excessive rainwater from seeping into the original soil base, avoiding the risk of landslides caused by increased soil self-weight and decreased shear strength, and improving the service life of the road; the double filter layer design on the road side and the protective slope side respectively blocks sand and gravel debris and solid particles in the fill layer from entering the drainage holes, ensuring smooth drainage channels; the base anchor rod structure enhances the anti-floating and anti-horizontal displacement capabilities of the retaining components, and cooperates with the detachable cover assembly to realize convenient maintenance of the sump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of a highway slope protection structure suitable for tropical rainy climates according to an embodiment of the present application; Figure 2 This is a cross-sectional view of a highway slope protection structure suitable for tropical rainy climates according to an embodiment of the present application; Figure 3 This is a cross-sectional view of a drainage pipe assembly in a highway slope protection structure suitable for use in tropical rainy climates according to an embodiment of the present application; Figure 4 This is an exploded view of a cover plate assembly in a highway slope protection structure suitable for tropical rainy climates according to an embodiment of the present application; Figure 5 This is a diagram of the adjustment process of a slope protection method for a highway slope protection structure suitable for tropical rainy climates in an embodiment of the present application; Figure 6 This is a flow chart of a construction method for a highway slope protection structure suitable for tropical rainy climates in an embodiment of the present application.

[0017] In the figure: 1-original soil foundation; 2-road body; 21-cushion; 22-base layer; 23-impermeable surface layer; 3-retaining member; 31-base; 310-water storage chamber; 32-water collecting trough; 320-drainage hole; 3200-receiving trough; 321-notch; 33-anchor rod; 4-protective slope; 41-anti-seepage bottom layer; 42-fill layer; 43-vegetation layer; 5-drainage pipe assembly; 51-inner pipe; 52-third filter layer; 53-porous clay pipe; 6-first filter layer; 7-second filter layer; 8-cover assembly; 81-mounting seat; 810-receiving chamber; 811-flow hole; 812-limiting notch; 82-filter body; 83-cover. DETAILED DESCRIPTION

[0018] like Figure 1 、 2 As shown, a highway slope protection structure suitable for tropical rainy climates includes: An original soil base 1, on which a road body 2 is provided, wherein the road body 2 comprises, from bottom to top, a cushion layer 21, a base layer 22, and an impermeable surface layer 23; A pair of retaining members 3 are provided on both sides of the road body 2 in the transverse direction of the road, and are provided along the longitudinal extension of the road body 2. The retaining members 3 include: a base 31, a water collecting trough 32 with an upper end opening, a plurality of drainage holes 320 are provided on the sidewalls of the water collecting trough 32, and the drainage holes 320 are used to collect water outside the water collecting trough 32. The base 31 is embedded in the original soil foundation 1, and the water collecting trough 32 is provided on the base 31. The base 31 includes: a water storage chamber 310, and the water storage chamber 310 is connected to the water collecting trough 32; The protective slope body 4 is arranged on the side of the retaining member 3 away from the road body 2. The protective slope body 4 includes, from bottom to top,: an anti-seepage bottom layer 41, a fill layer 42, and a vegetation layer 43. The water storage cavity 310 is provided with: a drainage pipe assembly 5, which extends axially into the fill layer 42. The drainage pipe assembly 5 is used to introduce water in the fill layer 42 into the water storage cavity 310, and when the fill layer 42 is dry, it transports moisture to the fill layer 42.

[0019] Based on the above structure, the principle of the highway slope protection structure suitable for tropical rainy climate is as follows: when it rains, since the impermeable surface layer 23 is made of impermeable material, the surface rainwater on the side of the road body 2 will flow into the water collecting trough 32 through the drainage holes 320 on the side wall of the water collecting trough 32. Since the water storage chamber 310 is connected to the water collecting trough 32, the rainwater will eventually flow into the water storage chamber 310; and the rainwater on the side of the protective slope body 4, the vegetation layer 43 first intercepts part of the rainwater to slow down the slope runoff speed, and the rainwater that is not intercepted forms runoff along the surface of the fill layer 42, a part of it penetrates into the interior of the fill layer 42, and the other part flows into the water collecting trough 32 through the drainage holes 320 of the protective slope body 4 and is collected in the storage chamber. Water is stored in the water chamber 310. When the water content of the fill layer 42 is too high, the drainage pipe assembly 5 draws the water from the fill layer 42 into the water storage chamber 310, reducing the soil saturation and preventing the slope of the protective slope 4 from becoming unstable due to excessive moisture. When the fill layer 42 is dry, rainwater in the water storage chamber 310 can be transported back to the fill layer 42 through the drainage pipe assembly 5, providing irrigation water for the vegetation layer 43, achieving water resource recycling, ensuring the slope protection effect, and preventing slope instability. The anti-seepage bottom layer 41 is used to prevent rainwater from continuing to seep from the fill layer 42, resulting in an increase in the water content of the original soil base 1, increasing the soil's deadweight and reducing the shear strength, thus avoiding damage to the roadbed and increasing the service life of the road. The impermeable surface layer 23 uses a modified asphalt pavement, and the anti-seepage bottom layer 41 uses a bentonite waterproof blanket. The retaining member 3 is a concrete member.

[0020] In this embodiment, a first filter layer 6 is provided between the retaining member 3 and the protective slope 4. This first filter layer 6 covers the outer side of the drainage holes 320 on the side of the protective slope 4 and extends longitudinally along the roadway 2. This first filter layer 6 allows water to flow through the drainage holes 320 while intercepting larger solid impurities in the fill layer 42, preventing clogging of the drainage holes 320 and ensuring unobstructed drainage. This first filter layer 6 utilizes a sand and gravel filter bag.

[0021] In this embodiment, a second filter layer 7 is provided between the impermeable surface layer 23 and the retaining member 3. The second filter layer 7 is disposed on the outside of the drainage holes 320 on the road body 2 side. The second filter layer 7 is embedded in the sidewall of the retaining member 3 and extends vertically beyond the impermeable surface layer 23. The second filter layer 7 is used to prevent sand, gravel, and other debris on the impermeable surface layer 23 from entering the sump 32 through the drainage holes 320 on the road body 2 side and causing blockage. The second filter layer 7 utilizes a sand and gravel filter bag. A receiving groove 3200 is provided on the outer wall of the sump 32 on the road body 2 side. The receiving groove 3200 is used to accommodate the second filter layer 7.

[0022] In this embodiment, Figure 3 As shown, the drainage pipe assembly 5 includes: an inner pipe 51, a plurality of drainage holes are provided on the inner pipe 51, and the drainage holes are spirally arranged along the axial direction of the inner pipe 51; a porous clay pipe 53 is provided on the outer side of the inner pipe 51, and a third filter layer 52 is provided between the porous clay pipe 53 and the inner pipe 51, and the third filter layer 52 is coated on the outer side of the inner pipe 51. The porous clay tube 53 is made of porous material, and there are a large number of tiny pores inside it to form "micro capillaries". When heavy rain continues and the water content in the fill layer 42 is saturated, the saturated water will freely enter the inner tube 51 along the pores of the porous clay tube 53 and the third filter layer 52 under the action of gravity, and flow into the water storage chamber 310. When a continuous water flow is formed in the inner tube 51, the drainage holes arranged in a spiral along the axial direction of the inner tube 51 will accelerate the flow collection, promote the siphon effect in the inner tube 51, and further absorb the saturated water in the fill layer 42 to prevent the accumulation of water in the fill layer 42 from causing the roots of the anti-seepage bottom layer 41 to rot due to lack of oxygen, while recycling water resources. When the fill layer 42 is dry, When the humidity of the fill layer 42 is lower than that of the drainage pipe assembly 5, water actively rises along the axial direction of the porous clay tube 53 through capillary action within the fine pores of the porous clay tube 53 and seeps out to the surface. After seeping through the porous clay tube 53, the water diffuses into the dry fill layer 42, continuously replenishing moisture in the anti-seepage base layer 41. The capillary action of the porous clay tube 53, combined with the physical principles of gravity flow, works in conjunction with the water storage chamber 310 to achieve adaptive humidity regulation, reducing the risk of soil erosion on the protective slope 4 and helping to maintain its stability. The third filter layer 52 is used to block fine particles in the water and prevent clogging of the drainage holes. The third filter layer 52 uses a nylon filter.

[0023] In this embodiment, two sets of anchor rods 33 are installed at the bottom of the base 31. These two sets of anchor rods 33 are spaced apart in the transverse direction of the road, while one set of anchor rods 33 is evenly spaced in the longitudinal direction of the road. The anchor rods 33 ensure the stability of the retaining member 3 by preventing the base 31 from being lifted by buoyancy. Furthermore, when the fill layer 42 becomes saturated with water, they resist the active earth pressure of the fill layer 42, preventing horizontal displacement of the retaining member 3. The anchor rods 33 are reinforced mortar anchor rods and extend axially into the original soil foundation 1.

[0024] In this embodiment, the upper opening of the water collecting trough 32 is provided with a cover assembly 8. The cover assembly 8 is detachably mounted on the upper opening of the water collecting trough 32. The cover assembly 8 includes a mounting seat 81. Notches 321 are provided on both inner side walls of the water collecting trough 32. When the cover assembly 8 is mounted on the upper opening of the water collecting trough 32, the mounting seat 81 abuts against the bottom and side walls of the notches 321 in the vertical and horizontal directions. The cover assembly 8 is used to protect the water collecting trough 32 and prevent debris such as mud, sand, and fallen leaves from falling into the water collecting trough 32. The design of the notches 321 facilitates the rapid positioning and stable bearing of the mounting seat 81 during installation. At the same time, the detachable mounting seat 81 also facilitates the cleaning of debris such as mud, sand, and fallen leaves accumulated in the water collecting trough 32. The notches 321 are arranged to extend longitudinally along the road.

[0025] In this embodiment, Figure 4 As shown, the mounting seat 81 includes: a cavity 810 with an upper opening; a plurality of water holes 811 are provided at the bottom of the mounting seat 81. The water holes 811 are spaced apart along the longitudinal and transverse directions of the road, and the water holes 811 are connected to the cavity 810. A filter body 82 is provided in the cavity 810, and the filter body 82 covers the water holes 811. A cover plate 83 is provided at the upper opening of the cavity 810, and the cover plate 83 is detachably mounted on the mounting seat 81. The filter body 82 is used to filter sewage that falls into the cavity 810, preventing debris such as leaves and fine sand and gravel from clogging the water holes 811, and at the same time, preventing debris such as leaves and fine sand and gravel from flowing into the sump 32; the cover plate 83 is detachably designed to facilitate cleaning and replacement of the filter body 82 in the cavity 810. The water flow holes 811 are evenly spaced at the bottom of the mounting seat 81 along the longitudinal and transverse directions of the road; the filter body 82 adopts a sand and gravel filter bag; a limiting notch 812 is provided on the inner side wall of the mounting seat 81, and the cover plate 83 abuts against the bottom and side walls of the limiting notch 812 in the vertical and horizontal directions.

[0026] like Figure 5 As shown, a slope protection method for highway slope protection structures suitable for tropical rainy climates includes the following dynamic adjustment process: Rainwater collection stage: Surface runoff on the road body 2 is filtered by the second filter layer 7 and then flows into the water collection tank 32 through the corresponding drainage holes 320 and into the water storage chamber 310 for storage. Surface runoff on the protective slope 4 is intercepted and slowed down by the vegetation layer 43. Part of the rainwater seeps into the fill layer 42, and the remaining runoff is filtered by the first filter layer 6 and then flows into the water storage chamber 310 through the corresponding drainage holes 320. Saturated drainage stage: When the fill layer 42 is saturated with water, the water penetrates through the pores of the porous clay tube 53, is filtered by the third filter layer 52, and then flows through the spiral drainage holes of the inner tube 51. The water is then siphoned into the water storage chamber 310 through the drainage pipe assembly 5, thereby reducing the soil saturation in the fill layer 42. Drought water supply stage: When the fill layer 42 is dry, the water stored in the water storage chamber 310 is reversely transferred through the drainage pipe assembly 5, and rises and seeps out with the help of the capillary action of the porous clay pipe 53, continuously moistening the fill layer 42 and replenishing the vegetation layer 43; Anti-seepage stabilization mechanism: The anti-seepage bottom layer 41 blocks water from seeping into the original soil foundation 1, preventing the shear strength of the original soil foundation 1 from decreasing. The anchor rods 33 resist the active earth pressure when the fill layer 42 is saturated and the buoyancy of the water storage cavity 310, maintaining the stability of the retaining member 3; Maintenance operation: Regularly remove the cover plate 83 to clean the silt in the filter body 82 and the water collection tank 32 to ensure that the drain hole 320 and the drainage pipe assembly 5 are unobstructed.

[0027] like Figure 6 As shown, a construction method for a highway slope protection structure suitable for tropical rainy climates includes the following steps: S1, clean up the debris on the surface of the original soil base 1 and trim the slope to the designed slope; S2, construct anchor rods 33 at preset intervals, pour concrete base 31, and reserve installation position for drainage pipe assembly 5; S3, construct the water collection tank 32 on the base 31, connect the water storage chamber 310 with the water collection tank 32, reserve the drainage hole 320 at the preset position, and install the drainage pipe assembly 5 to the designed depth of the fill layer 42; S4: When the retaining member 3 reaches the designed strength, the cushion layer 21 and base layer 22 are laid in layers on the road body 2 and compacted to the designed compaction degree. The second filter layer 7 is embedded in the groove 3200 on the side wall of the retaining member 3, and the impermeable surface layer 23 is laid, and the joint with the second filter layer 7 is sealed. On the side of the protective slope 4, an anti-seepage base layer 41 is laid, a first filter layer 6 is constructed, a backfill layer 42 is backfilled and compacted in layers, and green plants are planted on the top surface of the backfill layer 42 to form a vegetation layer 43; S5, the mounting seat 81 is inserted into the notch 321, the filter body 82 is filled into the cavity 810, and the cover plate 83 is added to complete the construction.

[0028] In step S4, the impermeable surface layer 23 is laid after the backfill layer 42 is backfilled.

[0029] The technical principles of the present invention have been described above in conjunction with specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. A highway slope protection structure suitable for tropical rainy climates, characterized by: include: An original soil base (1), wherein a road body (2) is provided on the original soil base (1), and the road body (2) comprises, from bottom to top, a cushion layer (21), a base layer (22), and an impermeable surface layer (23); A pair of retaining members (3), wherein the pair of retaining members (3) are arranged on both sides of the road body (2) in the transverse direction of the road, and the pair of retaining members (3) are arranged along the longitudinal extension of the road body (2), the retaining members (3) comprising: a base (31), a water collecting trough (32) with an upper end opening, a plurality of drainage holes (320) being provided on the side wall of the water collecting trough (32), the drainage holes (320) being used to collect water outside the water collecting trough (32), the base (31) being embedded in the original soil foundation (1), the water collecting trough (32) being arranged on the base (31), and the base (31) comprising: a water storage cavity (310), the water storage cavity (310) being in communication with the water collecting trough (32); A protective slope body (4) is provided on a side of the retaining member (3) away from the road body (2), and the protective slope body (4) comprises, from bottom to top, an anti-seepage bottom layer (41), a fill layer (42), and a vegetation layer (43). A drainage pipe assembly (5) is provided in the water storage cavity (310), and the drainage pipe assembly (5) extends axially into the fill layer (42). The drainage pipe assembly (5) is used to introduce water in the fill layer (42) into the water storage cavity (310), and when the fill layer (42) is dry, the drainage pipe assembly (5) is used to transport water to the fill layer (42).

2. The highway slope protection structure suitable for tropical rainy climate according to claim 1, characterized in that: A first filter layer (6) is provided between the retaining member (3) and the protective slope body (4). The first filter layer (6) is covered on the outside of the side drainage hole (320) of the protective slope body (4). The first filter layer (6) is provided along the longitudinal extension of the road body (2).

3. The highway slope protection structure suitable for tropical rainy climate according to claim 1, characterized in that: A second filter layer (7) is provided between the impermeable surface layer (23) and the retaining member (3), the second filter layer (7) being covered on the outside of the drainage hole (320) on the side of the road body (2), the second filter layer (7) being embedded in the side wall of the retaining member (3), and the second filter layer (7) extending out of the impermeable surface layer (23) in the vertical direction.

4. The highway slope protection structure suitable for tropical rainy climate according to claim 1, characterized in that: The drainage pipe assembly (5) comprises: an inner pipe (51), a plurality of drainage holes are provided on the inner pipe (51), and the drainage holes are spirally arranged along the axial direction of the inner pipe (51); a porous clay pipe (53) is provided on the outer side of the inner pipe (51), a third filter layer (52) is provided between the porous clay pipe (53) and the inner pipe (51), and the third filter layer (52) is coated on the outer side of the inner pipe (51).

5. The highway slope protection structure suitable for tropical rainy climate according to claim 1, characterized in that: Two groups of anchor rods (33) are provided at the bottom of the base (31). In the transverse direction of the road, the two groups of anchor rods (33) are arranged at intervals, and in the longitudinal direction of the road, one group of anchor rods (33) is arranged at even intervals.

6. The highway slope protection structure suitable for tropical rainy climate according to claim 1, characterized in that: The upper opening of the water collecting trough (32) is provided with a cover plate assembly (8), the cover plate assembly (8) is detachably mounted on the upper opening of the water collecting trough (32), the cover plate assembly (8) comprises a mounting seat (81), both inner side walls of the water collecting trough (32) are provided with a notch (321), and when the cover plate assembly (8) is mounted on the upper opening of the water collecting trough (32), the mounting seat (81) abuts against the bottom and side walls of the notch (321) in the vertical and horizontal directions.

7. The highway slope protection structure suitable for tropical rainy climate according to claim 6, characterized in that: The mounting seat (81) comprises: a cavity (810) with an upper opening; a plurality of water flow holes (811) are provided at the bottom of the mounting seat (81); the water flow holes (811) are spaced apart along the longitudinal and transverse directions of the road; the water flow holes (811) are communicated with the cavity (810); a filter body (82) is provided in the cavity (810); the filter body (82) is covered on the water flow holes (811); a cover plate (83) is provided at the upper opening of the cavity (810); the cover plate (83) is detachably mounted on the mounting seat (81).

8. A slope protection method for a highway slope protection structure suitable for tropical rainy climates, implemented based on the highway slope protection structure suitable for tropical rainy climates according to any one of claims 1 to 7, characterized in that: The dynamic adjustment process includes the following: Rainwater collection stage: the surface runoff on the road body (2) side is filtered by the second filter layer (7), then flows into the water collection tank (32) through the corresponding drainage holes (320), and flows into the water storage chamber (310) for storage. The surface runoff on the protective slope (4) side is intercepted and slowed down by the vegetation layer (43), and part of the rainwater infiltrates into the fill layer (42). The remaining runoff is filtered by the first filter layer (6), and then flows into the water storage chamber (310) through the corresponding drainage holes (320); Saturated drainage stage: When the water content in the fill layer (42) is saturated, the water penetrates through the pores of the porous clay tube (53), is filtered by the third filter layer (52), and then converges through the spiral drainage holes of the inner tube (51), and is siphoned into the water storage chamber (310) through the drainage pipe assembly (5), thereby reducing the soil saturation in the fill layer (42); Drought water supply stage: When the fill layer (42) is dry, the water stored in the water storage chamber (310) is reversely transmitted through the drainage pipe assembly (5), and rises and seeps out with the help of the capillary action of the porous clay pipe (53), continuously moistening the fill layer (42) and replenishing the vegetation layer (43); Anti-seepage stabilization mechanism: the anti-seepage bottom layer (41) blocks water from seeping into the original soil foundation (1), preventing the shear strength of the original soil foundation (1) from decreasing; the anchor rods (33) resist the active earth pressure when the fill layer (42) is saturated and the buoyancy of the water storage cavity (310), maintaining the stability of the retaining member (3); Maintenance operation: Regularly remove the cover plate (83) to clean the silt in the filter body (82) and the water collection tank (32) to ensure that the drain hole (320) and the drainage pipe assembly (5) are unobstructed.

9. A construction method for a highway slope protection structure suitable for tropical rainy climates, based on the highway slope protection structure suitable for tropical rainy climates according to any one of claims 1 to 7, characterized in that: The steps include: S1, clean the surface debris of the original soil foundation (1) and trim the slope to the designed slope; S2, construct anchor rods (33) at preset intervals, pour concrete base (31), and reserve installation positions for drainage pipe assemblies (5); S3, constructing a water collecting trough (32) on the base (31), connecting the water storage chamber (310) with the water collecting trough (32), reserving a drainage hole (320) at a preset position, and installing a drainage pipe assembly (5) to the designed depth of the fill layer (42); S4, when the retaining member (3) reaches the design strength, the cushion layer (21) and the base layer (22) are laid in layers on the road body (2) side, compacted to the design compaction degree, the second filter layer (7) is embedded in the groove (3200) on the side wall of the retaining member (3), and the impermeable surface layer (23) is laid, and the joint with the second filter layer (7) is sealed; on the side of the protective slope (4), the anti-seepage bottom layer (41) is laid, the first filter layer (6) is constructed, the backfill layer (42) is backfilled in layers and compacted, and green plants are planted on the top surface of the backfill layer (42) to form a vegetation layer (43); S5, the mounting seat (81) is embedded in the missing portion (321), the filter body (82) is filled in the cavity (810), and the cover plate (83) is added to complete the construction.

10. The construction method of a highway slope protection structure suitable for tropical rainy climates according to claim 9, characterized in that: In the step S4, the impermeable surface layer (23) is laid after the backfill layer (42) is completed.

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