Modular assembled high fill retaining wall

Abstract

The application relates to a modular assembly type high-filled retaining wall, relates to the technical field of ecological protection, and comprises a high-filled soil body and a retaining wall body assembled by a plurality of prefabricated concrete modules, the retaining wall body assembled by the plurality of concrete modules is arranged at the left side of the high-filled soil body, and a three-stage drainage mechanism is integrated on the retaining wall body. The modular assembly type high-filled retaining wall integrates the three-stage drainage mechanism composed of a first-stage ground surface interception assembly, a second-stage wall back collection and drainage assembly and a third-stage wall body leading-out assembly in the retaining wall body, a complete hydrological regulation path from slope top runoff interception, wall back seepage filtration collection to wall body internal directional drainage is constructed. The seepage regulation layer effectively prevents the loss of fine particles of the high-filled soil body, the flow collection groove and the drainage pipe gallery arranged with a slope are cooperated to realize efficient one-way discharge of water flow, the static water pressure and the saturation line height behind the wall are obviously reduced, and the problems that the drainage holes of the traditional assembly type retaining wall are prone to be blocked and are difficult to maintain are solved.

Description

Technical Field

[0001] This invention relates to the field of ecological protection technology, specifically a modular prefabricated high-fill retaining wall. Background Technology

[0002] Retaining walls are important structures in geotechnical engineering used to support backfill or slopes and prevent soil collapse or landslides. They are widely used in high fill or deep excavation projects such as highways, railways, water conservancy embankments, mine slopes, and urban construction. Their core function is to maintain the overall stability of the slope while bearing lateral earth pressure, ensuring the safety of the superstructure or the surrounding environment. With the deepening of ecological and environmental protection concepts, modern retaining walls, in addition to meeting mechanical safety requirements, are endowed with ecological functions such as greening, soil and water conservation, and biodiversity creation.

[0003] Modular prefabricated retaining walls for high embankments offer significant advantages over traditional cast-in-place or masonry retaining walls in terms of construction efficiency, ecological performance, economy, and sustainability. By using prefabricated modular components, they can be rapidly assembled on-site, drastically shortening the construction cycle and reducing the environmental impact on the construction site. Furthermore, the modular design makes the retaining walls easy to disassemble and reuse, improving resource utilization and project sustainability. However, despite these significant advancements in construction efficiency, ecological integration, and standardization, these structures generally suffer from systemic deficiencies in drainage system design, making it difficult to meet the stringent requirements for long-term stability, water pressure resistance, and durability under high embankment conditions.

[0004] High embankment retaining walls (fill height ≥ 6m) exhibit distinctly different hydrological characteristics compared to ordinary slopes under rainfall conditions: greater fill height, longer seepage paths, higher hydrostatic pressure, and a tendency for the phreatic line to rise. Traditional drainage systems struggle to meet the stringent requirements for long-term stability, water pressure resistance, and durability under high embankment conditions, while conventional slope retaining wall technologies such as CN211312590U cannot address the unique hydrological challenges of high embankments.

[0005] The current mainstream modular prefabricated high embankment retaining wall technology has the following problems in drainage system design: First, the drainage design is fragmented, focusing only on the arrangement of drainage holes on the wall and neglecting the complete drainage system, failing to fully consider the unique hydrological characteristics of high embankments; second, the drainage holes are simple in construction, with small diameters, few in number, and fixed in location, lacking anti-clogging and dredging designs, which makes them prone to blockage during long-term use and affects drainage efficiency; finally, there is a conflict between ecological function and drainage function, for example, vegetation roots may invade the drainage holes and cause blockage, reducing the effectiveness of the drainage system. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a modular prefabricated high-fill retaining wall, which has advantages such as systematic drainage, ecological functional zoning, strong maintainability and high construction efficiency. It solves the problems of fragmented drainage systems, easy blockage and difficulty in dredging drainage holes, and mutual interference between ecological and drainage functions.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a modular prefabricated high-fill retaining wall, comprising a high-fill soil body and a retaining wall body assembled from multiple precast concrete modules, wherein the retaining wall body composed of multiple concrete modules is laid on the left side of the high-fill soil body, and the retaining wall body integrates a three-stage drainage mechanism, specifically including the following:

[0008] Primary surface water interception components: used to intercept and divert surface runoff;

[0009] Secondary wall-mounted drainage system: used to filter and collect seepage water;

[0010] Three-level wall outlet component: used for drainage outlet;

[0011] The primary surface water interception component includes an interception trough and a permeable pavement layer. The interception trough is located at the edge of the slope top of the retaining wall body, and the permeable pavement layer is laid on the surface of the slope of the retaining wall body.

[0012] The secondary wall back drainage assembly includes a seepage control layer and a flow channel. The seepage control layer is located between the retaining wall bodies, and the flow channel is designed longitudinally and is opened on the right side of the retaining wall body and communicates with the seepage control layer.

[0013] The three-level wall outlet component includes a drainage corridor pre-embedded in the retaining wall body. One end of the drainage corridor is connected to the manifold channel, and the other end opens on the left side surface of the retaining wall body, with a quick-connect detachable cap at its port.

[0014] Furthermore, the retaining wall body is divided into an ecological functional section, a slow-release water guiding section, and a drainage collection section from top to bottom. The ecological functional section is located at the top of the retaining wall body and the top of the left side surface, and is filled with composite vegetation medium and planted with vegetation. The slow-release water guiding section is located below the ecological functional section and is filled with slow-release water guiding substrate. The drainage collection section is located at the outlet of the drainage pipe gallery and water collection components of the retaining wall body and is used to arrange the outlet of the drainage pipe gallery.

[0015] Furthermore, the seepage control layer is composed of an inner non-woven geotextile and an outer graded crushed stone layer. The inner non-woven geotextile directly covers the surface of the high fill soil, and the outer graded crushed stone layer is sandwiched between the inner non-woven geotextile and the back of the retaining wall body.

[0016] Furthermore, the drainage pipe gallery is wrapped with double-layer geotextile on the side near the high fill soil, and a stainless steel filter screen and a root barrier membrane are fixed at the left end outlet of the drainage pipe gallery. The stainless steel filter screen has a pore size of 0.5 to 2 mm, and the root barrier membrane is a high-density polyethylene anti-root penetration membrane.

[0017] Furthermore, the cap is detachably connected to the guide pipe gallery via a quick-release method of rotating buckle, magnetic attachment or threaded structure, and a pull ring is fixed on one side of the cap.

[0018] Furthermore, the multiple precast concrete modules in the retaining wall body are connected by tongue and groove joints, and flexible water-stop strips are embedded at the joints.

[0019] Furthermore, the ecological functional area is planted with mixed vegetation, including ground cover herbs, mid-level shrubs and climbing vines, with their root systems distributed in layers.

[0020] Furthermore, the slow-release water-conducting substrate is composed of humus, coconut coir, and water-retaining resin mixed in a certain mass ratio, with a bulk density of 1.0–1.4 g / cm³.

[0021] Furthermore, a transverse connecting pipe is provided at the bottom of the drainage collection section, and multiple drainage pipe corridors are interconnected through the transverse connecting pipe.

[0022] Furthermore, the drainage corridor is arranged at a downward slope of % in the horizontal direction inside the retaining wall body, and its axis is not parallel to the surface of the high fill soil, so that the water flows unidirectionally from the confluence channel to the outer outlet of the retaining wall body under the action of gravity, avoiding local water accumulation or backflow.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] 1. This modular prefabricated high-fill retaining wall integrates a three-stage drainage system within the retaining wall body, consisting of a primary surface water interception component, a secondary back-wall drainage component, and a tertiary wall-body drainage component. This constructs a complete hydrological control path from slope top runoff interception, back-wall seepage filtration and collection, to directional drainage within the wall body. Specifically, the seepage control layer effectively prevents the loss of fine particles from the high-fill soil, and the confluence channel and the sloped drainage corridor work together to achieve efficient unidirectional water discharge, significantly reducing the hydrostatic pressure and phreatic line height behind the wall. Simultaneously, the drainage corridor outlet is equipped with a stainless steel filter and root barrier membrane, along with a quick-connect detachable cap and pull ring structure, facilitating regular high-pressure flushing or mechanical dredging. This fundamentally solves the problems of easy clogging and difficult maintenance of drainage holes in traditional prefabricated retaining walls, significantly extending the structural service life and ensuring the long-term stability of high-fill slopes under extreme conditions such as heavy rain and snowmelt.

[0025] 2. This modular prefabricated high-fill retaining wall divides the retaining wall body into three functional zones along its height: an ecological functional zone, a slow-release water-conducting zone, and a drainage collection zone. This achieves spatial decoupling and coordinated operation of ecological and drainage functions. The upper ecological functional zone is filled with composite vegetation media and configured with mixed grass-shrub-vine vegetation to form multi-layered three-dimensional greening. The middle slow-release water-conducting zone uses a slow-release water-conducting substrate made of humus, coconut coir, and water-retaining resin. While receiving irrigation or rainwater, it slowly conducts water downwards, avoiding erosion of the lower drainage structure. The lower drainage collection zone centrally arranges the outlet of the drainage corridor and the transverse connecting pipes to ensure that the drainage path is independent and unobstructed. This zoning design effectively avoids the contradictions in traditional ecological retaining walls where vegetation roots invade the drainage holes or irrigation water interferes with the drainage system. It ensures that the ecological and drainage functions do not interfere with each other and support each other, truly achieving the three-in-one engineering goal of "structural safety, hydrological regulation, and ecological sustainability" for high-fill retaining walls. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the three-stage drainage mechanism of the present invention;

[0028] Figure 3 This is a schematic diagram of the manifold channel structure of the present invention;

[0029] Figure 4 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0030] In the diagram: 1. High fill, 2. Retaining wall body, 21. Ecological function section, 22. Slow-release water guiding section, 23. Drainage collection section, 3. Three-level drainage mechanism, 31. Primary surface interception component, 3101. Interception channel, 3102. Permeable pavement layer, 32. Secondary wall back drainage component, 3201. Seepage control layer, 32011. Inner non-woven geotextile, 32012. Outer graded crushed stone layer, 3202. Drainage channel, 33. Three-level wall outlet component, 3301. Drainage corridor, 3302. Pull ring, 3303. Cap, 4. Double-layer geotextile, 5. Stainless steel filter mesh, 6. Barrier membrane. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-4This embodiment of a modular prefabricated high embankment retaining wall includes a high embankment 1 and a retaining wall body 2 assembled from multiple precast concrete modules. The retaining wall body 2, composed of multiple concrete modules, is laid on the left side of the high embankment 1. The retaining wall body 2 integrates a three-stage drainage mechanism 3, specifically including the following:

[0033] Primary surface water interception component 31: used to intercept and divert surface runoff;

[0034] Secondary wall-mounted drainage assembly 32: used to filter and collect seepage water;

[0035] Level 3 wall drain component 33: Used for drainage pouring;

[0036] The primary surface water interception component 31 includes an interception channel 3101 and a permeable pavement layer 3102. The interception channel 3101 is located at the edge of the slope top of the retaining wall body 2, and the permeable pavement layer 3102 is laid on the surface of the slope of the retaining wall body 2.

[0037] The secondary wall back drainage assembly 32 includes a seepage control layer 3201 and a flow channel 3202. The seepage control layer 3201 is located between the retaining wall bodies 2. The flow channel 3202 is designed longitudinally and is opened on the right side of the retaining wall body 2 and is connected to the seepage control layer 3201.

[0038] The third-level wall outlet component 33 includes a guide pipe gallery 3301 pre-embedded in the retaining wall body 2. One end of the guide pipe gallery 3301 is connected to the confluence channel 3202, and the other end opens on the left side surface of the retaining wall body 2, and a detachable cap 3303 is quickly attached to its port.

[0039] It should be noted that by integrating a three-stage drainage mechanism 3 on the retaining wall body 2, including a primary surface water interception component 31, a secondary wall back drainage component 32, and a tertiary wall body drainage component 33, and combining it with the ecological function section 21, the slow-release water guiding section 22, and the drainage collection section 23 divided from top to bottom on the retaining wall body 2, a complete hydrological path is constructed from the interception of runoff at the top of the high fill 1 slope → the filtration and collection of infiltration water at the back of the wall → the directional drainage inside the wall, which effectively solves the problem of fragmentation and ecological-drainage function conflict in the traditional retaining wall drainage system.

[0040] The retaining wall body 2 is divided into an ecological function section 21, a slow-release water guiding section 22, and a drainage collection section 23 from top to bottom. The ecological function section 21 is located at the top of the top of the retaining wall body 2 and the top of the left side surface, and is filled with composite vegetation medium and planted with vegetation. The slow-release water guiding section 22 is located below the ecological function section 21 and is filled with slow-release water guiding substrate. The drainage collection section 23 is located on the retaining wall body 2 and is used to arrange the outlet of the drainage corridor 3301 and the water collection components.

[0041] It should be noted that the ecological function section 21 is filled with composite vegetation medium and planted with vegetation, the slow-release water guiding section 22 uses slow-release water guiding substrate to receive and slowly guide water, and the drainage collection section 23 centrally arranges the outlet of the drainage corridor 3301. The three sections are divided into upper and lower zones and have independent functions, which avoids irrigation water from washing away the drainage structure or roots from invading the drainage corridor 3301, and achieves the coordinated operation of ecological water conservation and efficient drainage.

[0042] The seepage control layer 3201 is composed of an inner non-woven geotextile 32011 and an outer graded crushed stone layer 32012. The inner non-woven geotextile 32011 is directly covered on the surface of the high fill 1, and the outer graded crushed stone layer 32012 is sandwiched between the inner non-woven geotextile 32011 and the back of the retaining wall body 2.

[0043] It should be noted that the seepage control layer 3201 is composed of an inner non-woven geotextile 32011 and an outer graded crushed stone layer 32012. The inner non-woven geotextile 32011 is closely attached to the surface of the high fill soil 1 to prevent the loss of fine particles. The outer graded crushed stone layer 32012 is sandwiched between the inner non-woven geotextile 32011 and the back of the retaining wall body 2 to provide a high permeability channel, which significantly improves the filtration reliability and water collection efficiency.

[0044] Among them, the drainage pipe gallery 3301 is wrapped with double-layer geotextile 4 on the side near the high fill 1, and a stainless steel filter screen 5 and a root barrier membrane 6 are fixed at the left end outlet of the drainage pipe gallery 3301. The stainless steel filter screen 5 has a pore size of 0.5 to 2 mm, and the root barrier membrane 6 is a high-density polyethylene anti-root penetration membrane.

[0045] It should be noted that the drainage pipe gallery 3301 is wrapped with double-layer geotextile 4 on the side close to the high fill 1, and stainless steel filter screen 5 and root barrier membrane 6 are fixed at the outer end outlet, forming a double barrier of "geotextile + filter screen / root barrier membrane", which effectively prevents siltation and plant roots from penetrating into the drainage pipe gallery 3301, and ensures that the drainage channel is unobstructed for a long time.

[0046] The cap 3303 is detachably connected to the guide pipe gallery 3301 by a quick-release method of rotating buckle, magnetic attachment or threaded structure, and a pull ring 3302 is fixed on one side of the cap 3303.

[0047] It should be noted that the cap 3303 is quickly connected to the drainage pipe gallery 3301 via a rotating buckle, magnetic attachment, or threaded structure, and is equipped with a pull ring 3302, which allows maintenance personnel to quickly open it by hand to perform high-pressure flushing or dredging of the drainage pipe gallery 3301, greatly reducing the later maintenance costs and realizing proactive and long-term management of the drainage system.

[0048] Among them, the multiple precast concrete modules in the retaining wall body 2 are connected by tongue and groove joints, and flexible water-stop strips are embedded at the joints.

[0049] It should be noted that the retaining wall body 2, which is composed of multiple precast concrete modules, adopts a tongue and groove joint connection. Flexible water-stop strips are embedded at the joints to ensure assembly accuracy and overall stability, adapt to minor deformations of the foundation, prevent leakage at the joints, and improve the structural durability and waterproof performance.

[0050] Within the ecological functional section 21, mixed vegetation is planted, including ground cover herbs, mid-level shrubs, and climbing vines, with their root systems distributed in layers.

[0051] It should be noted that the mixed vegetation consisting of ground cover herbaceous plants, mid-level shrubs and climbing vines planted in the ecological functional section 21 has a layered root system, forming a multi-layered three-dimensional greening and deep living reinforcement effect, which enhances the slope's resistance to erosion and biodiversity, and is significantly better than the traditional ecological protection of single vegetation cover.

[0052] The slow-release water-conducting substrate is made of humus, coconut coir, and water-retaining resin mixed in a certain mass ratio, with a bulk density of 1.0 to 1.4 g / cm³.

[0053] It should be noted that the slow-release water-conducting substrate is made of humus, coconut coir and water-retaining resin mixed in a certain mass ratio, with a bulk density of 1.0 to 1.4 g / cm³. It has excellent water retention-permeability balance performance, can store water in the rainy season and slowly release it in the dry season, continuously supplying the vegetation in the ecological function section 21 with the water required, while avoiding excessive water flow from directly impacting the drainage collection section 23.

[0054] Among them, the bottom of the drainage collection section 23 is provided with a horizontal connecting pipe, and multiple drainage pipe corridors 3301 are interconnected through the horizontal connecting pipe.

[0055] It should be noted that a horizontal connecting pipe is installed at the bottom of the drainage collection section 23, so that multiple drainage pipe corridors 3301 are interconnected to form a grid drainage network, eliminating local drainage blind spots, ensuring uniform and efficient water discharge of the entire retaining wall surface, and improving system redundancy and overall drainage reliability.

[0056] The drainage corridor 3301 is arranged at a downward slope of 5% along the horizontal direction inside the retaining wall body 2, and its axis is not parallel to the surface of the high fill 1. This allows the water to flow unidirectionally from the confluence channel 3202 to the outer outlet of the retaining wall body 2 under the action of gravity, thus avoiding local water accumulation or backflow.

[0057] It should be noted that the drainage pipe gallery 3301 is arranged at a downward slope of 5% along the horizontal direction inside the retaining wall body 2, and its axis is not parallel to the surface of the high fill 1. It uses gravity to drive the water flow from the confluence channel 3202 to the outer outlet of the retaining wall body 2, effectively preventing water accumulation, sediment deposition or backflow in the pipe, and significantly improving the self-cleaning ability and drainage stability.

[0058] In this application, the present invention integrates a three-stage drainage mechanism within the retaining wall body, consisting of a primary surface water interception component, a secondary back wall drainage component, and a tertiary wall outlet component. This constructs a complete hydrological regulation path from slope top runoff interception, back wall seepage filtration and collection, to directional drainage within the wall body, rather than simply setting up planting areas between retaining walls. Simultaneously, the retaining wall body is divided along its height into three functional zones: an ecological functional zone, a slow-release water guiding zone, and a drainage collection zone. This achieves spatial decoupling and coordinated operation of ecological and drainage functions. Furthermore, test results from embodiments show that, under the same rainfall conditions, the present invention reduces the back seepage line height by more than 35% compared to traditional prefabricated retaining walls, reduces hydrostatic pressure by 42%, reduces drainage hole blockage rate by more than 90%, and extends service life by more than 50%.

[0059] The working principle of the above embodiment is as follows: Under rainfall or snowmelt conditions, surface runoff is first intercepted by the interception channel 3101 set at the edge of the slope top of the retaining wall body 2, and initially infiltrated and drained through the permeable pavement layer 3102 covering the slope surface, forming a primary surface water interception component 31, effectively reducing the amount of water entering the high fill 1; the unintercepted water infiltrates into the high fill 1 and migrates to the back of the wall under the action of gravity, and is then captured by the seepage control layer 3201 closely attached to the surface of the high fill 1. —This layer is composed of an inner non-woven geotextile 32011 and an outer graded crushed stone layer 32012. It can both prevent the loss of fine soil particles and allow water to flow through, and collect seepage water into the longitudinally arranged collection channels 3202 to form a secondary wall back collection and drainage component 32. The collected water then enters the drainage pipe gallery 3301 pre-embedded in the retaining wall body 2. The side of the pipe gallery near the high fill 1 is wrapped with a double layer of geotextile 4, and the outlet end is equipped with a stainless steel filter screen 5 and a root barrier membrane 6 to prevent silt and plant roots from intruding. The water flow is blocked; the drainage pipe gallery 3301 is inclined at a downward slope of 5%, and its axis is not parallel to the surface of the high fill 1, ensuring that the water flows unidirectionally from the confluence channel 3202 to the outside of the wall under the drive of gravity; finally, the water flows out through the quick-connect detachable cap 3303, which is connected by a rotating buckle, magnetic attraction or thread, and is equipped with a pull ring 3302, which is convenient for periodic opening for high-pressure flushing or dredging, forming a maintainable three-level wall discharge assembly 33; at the same time, the retaining wall body 2. The upper ecological functional section 21 is filled with composite vegetation medium and planted with mixed grass-shrub-vine vegetation. Its root system is distributed in layers, which not only achieves three-dimensional greening, but also does not interfere with the drainage below. The middle slow-release water-conducting section 22 uses a slow-release water-conducting substrate made of humus, coconut coir and water-retaining resin. After receiving rainwater or irrigation water, it slowly conducts it downward to avoid eroding the drainage structure. The bottom drainage collection section 23 centrally arranges the outlet of the drainage corridor 3301, and connects multiple corridors through horizontal connecting pipes to form a systematic drainage network.

[0060] The entire system significantly reduces the height of the phreatic line within the high fill soil body 1 through an integrated "interception-collection-guidance-drainage" path, thereby reducing hydrostatic pressure and improving the long-term stability of the slope, while also taking into account ecological sustainability and ease of operation and maintenance.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular prefabricated high embankment retaining wall, comprising a high embankment (1) and a retaining wall body (2) assembled from multiple precast concrete modules, wherein the retaining wall body (2) composed of multiple precast concrete modules is laid on the left side of the high embankment (1), characterized in that: The retaining wall body (2) is equipped with a three-stage drainage mechanism (3), which specifically includes the following: Primary surface water interception component (31): used to intercept and divert surface runoff; Secondary wall-mounted drainage assembly (32): used to filter and collect seepage water; Three-level wall outlet component (33): used for drainage pouring out; The primary surface water interception component (31) includes an interception channel (3101) and a permeable pavement layer (3102). The interception channel (3101) is located at the edge of the slope top of the retaining wall body (2), and the permeable pavement layer (3102) is laid on the surface of the slope of the retaining wall body (2). The secondary wall back collection and drainage assembly (32) includes a seepage control layer (3201) and a flow channel (3202). The seepage control layer (3201) is located between the retaining wall body (2) and the high fill body (1). The flow channel (3202) is designed longitudinally and is opened on the right side of the retaining wall body (2) and communicates with the seepage control layer (3201). The three-level wall outlet component (33) includes a guide pipe gallery (3301) pre-embedded in the retaining wall body (2). One end of the guide pipe gallery (3301) is connected to the confluence channel (3202), and the other end is opened on the left side surface of the retaining wall body (2), and a detachable cap (3303) is quickly attached to its port.

2. The modular prefabricated high embankment retaining wall according to claim 1, characterized in that: The retaining wall body (2) is divided into an ecological function section (21), a slow-release water guiding section (22), and a drainage collection section (23) from top to bottom. The ecological function section (21) is located on the top of the retaining wall body (2) and the top of the left side surface, and is filled with composite vegetation medium and planted with vegetation. The slow-release water guiding section (22) is located below the ecological function section (21) and is filled with slow-release water guiding substrate. The drainage collection section (23) is located at the bottom of the retaining wall body (2) and is used to arrange the outlet of the drainage corridor (3301).

3. A modular prefabricated high embankment retaining wall according to claim 1, characterized in that: The seepage control layer (3201) is composed of an inner non-woven geotextile (32011) and an outer graded crushed stone layer (32012). The inner non-woven geotextile (32011) is directly covered on the surface of the high fill (1), and the outer graded crushed stone layer (32012) is sandwiched between the inner non-woven geotextile (32011) and the back of the retaining wall body (2).

4. A modular prefabricated high embankment retaining wall according to claim 1, characterized in that: The drainage corridor (3301) is wrapped with a double layer of geotextile (4) on the side close to the high fill (1), and a stainless steel filter (5) and a root barrier membrane (6) are fixed at the left end outlet of the drainage corridor (3301). The stainless steel filter (5) has a pore size of 0.5 to 2 mm, and the root barrier membrane (6) is a high-density polyethylene anti-root penetration membrane.

5. A modular prefabricated high embankment retaining wall according to claim 1, characterized in that: The cap (3303) is detachably connected to the guide pipe gallery (3301) by a quick-release method of rotating buckle, magnetic attachment or threaded structure, and a pull ring (3302) is fixed on one side of the cap (3303).

6. A modular prefabricated high embankment retaining wall according to claim 1, characterized in that: The multiple precast concrete modules in the retaining wall body (2) are connected by tongue and groove joints, and flexible water-stop strips are embedded at the joints.

7. A modular prefabricated high embankment retaining wall according to claim 2, characterized in that: The ecological functional section (21) is planted with mixed vegetation, including ground cover herbaceous plants, mid-level shrubs and climbing vines, with their root systems distributed in layers.

8. A modular prefabricated high embankment retaining wall according to claim 2, characterized in that: The slow-release water-conducting substrate is made of humus, coconut coir, and water-retaining resin mixed in a certain mass ratio, with a bulk density of 1.0 to 1.4 g / cm³.

9. A modular prefabricated high embankment retaining wall according to claim 2, characterized in that: The bottom of the drainage collection section (23) is provided with a horizontal connecting pipe, and multiple drainage pipe corridors (3301) are interconnected through the horizontal connecting pipe.

10. A modular prefabricated high embankment retaining wall according to claim 1, characterized in that: The drainage corridor (3301) is arranged at a downward slope of 5% in the horizontal direction inside the retaining wall body (2), and its axis is not parallel to the surface of the high fill (1), so that the water flows unidirectionally from the confluence channel (3202) to the outer outlet of the retaining wall body (2) under the action of gravity, avoiding local water accumulation or backflow.

Images