Fabricated catchment and drainage side ditch
By designing prefabricated water collection and drainage ditches, and using graded steps and anti-slide piles combined with prefabricated wing plates, the problems of landslides and soil erosion on high soil slopes during rainfall were solved, thereby improving the stability of the slope and drainage efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI CONSTR ENG TRAFFIC & SHIPPING GRP CO LTD
- Filing Date
- 2025-03-28
- Publication Date
- 2026-04-24
AI Technical Summary
High soil slopes are prone to landslides and collapses during rainfall, and sparse vegetation leads to soil erosion, affecting the stability of infrastructure and construction safety.
Design a prefabricated water collection and drainage ditch, including graded steps, anti-slide piles, prefabricated wing plates and hoisting system. The anti-slide piles penetrate the slope sliding surface, the prefabricated wing plates are combined with geotextile to form a waterproof layer, and the hoisting auxiliary device enables rapid installation.
It effectively prevents slope slippage, enhances soil stability, improves drainage efficiency, and ensures long-term slope stability and construction safety.
Smart Images
Figure CN224161086U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building construction technology, and specifically relates to a prefabricated water collection and drainage ditch and its hoisting system. Background Technology
[0002] High soil slopes are common along highways, waterways, and other infrastructure. Compared to rock slopes, soil slopes are more prone to landslides and collapses, leading to slope instability, especially during periods of heavy rainfall or when disturbed during construction or operation. Furthermore, infrastructure construction damages vegetation in the slope area, resulting in sparse or reduced vegetation due to human development. This leads to increased soil moisture content during heavy rainfall, creating water-rich slopes, which are unfavorable for construction during the rainy season. High slopes are also susceptible to soil erosion due to the cycle of rainfall, sun exposure, and weathering, compromising their long-term stability. Therefore, reinforcement and protection measures are necessary for high soil slopes along highways, waterways, and other infrastructure.
[0003] Therefore, there is an urgent need for a prefabricated water collection and drainage ditch to solve the above-mentioned technical problems. Utility Model Content
[0004] To address the aforementioned problems, this utility model provides a prefabricated water collection and drainage ditch, wherein the water collection and drainage ditch includes multi-level steps set on a steep soil slope, with each step containing a ditch channel and anti-slide piles.
[0005] The anti-slide piles are installed at N3-meter intervals on the steps, and the anti-slide piles penetrate the side ditch and pass through the graded slope sliding surface;
[0006] The side of the ditch is equipped with a prefabricated wing plate, and the prefabricated wing plate and the ditch are fully covered with geotextile with both ends extending out and inserted into the soil layer; the ditch is equipped with a ditch cover plate.
[0007] The angle between the side and bottom edge of the precast wing plate is the same as the angle of the side ditch. The precast wing plate is provided with multiple pre-embedded lifting points. Multiple wing plate stiffening ribs are placed at intervals on the inner side of the precast wing plate. The precast wing plate is provided with a first reserved hole and a second reserved hole respectively. A cast-in-place base plate is poured in the inner space of the precast wing plate.
[0008] Furthermore, the prefabricated wing plate is L-shaped, and the prefabricated wing plate is provided with wing plate reinforcement at the corner of the structure, forming an arc-shaped inner corner at the corner;
[0009] Each prefabricated wing plate is equipped with 4 pre-embedded lifting points, and the stiffening ribs of the wing plate are integrally formed with the prefabricated wing plate.
[0010] Furthermore, the first reserved hole is located above the second reserved hole.
[0011] Furthermore, the water collection and drainage ditch also includes a ditch drainage pipe, and the second reserved hole is connected to the ditch drainage pipe through a drainage pipe; the first reserved hole is connected to the slope drainage ditch set on the slope surface above the corresponding step.
[0012] Furthermore, every N4 meters on the cast-in-place base slab, there is a drainage slope formed by arching and slope repair, and the second reserved hole is located at the elevation 0 of the drainage slope.
[0013] Furthermore, the top elevation of the anti-slide pile is level with the elevation of the step on which it is located.
[0014] Furthermore, the geotextile fully laid on the inner side of the ditch is tightly laid along the inner wall of the ditch, with both ends extending out and inserted into the soil layer.
[0015] Furthermore, each prefabricated wing plate is equipped with 4 pre-embedded lifting points, which are evenly and symmetrically arranged in space, and the distance from each of the 4 pre-embedded lifting points to the longitudinal axis of symmetry is N6 meters.
[0016] On the other hand, this utility model also provides a hoisting system for a prefabricated water collection and drainage ditch, wherein the water collection and drainage ditch is the aforementioned water collection and drainage ditch, wherein the hoisting system includes a hoisting auxiliary device, the hoisting auxiliary device includes an I-beam, two cable holes are symmetrically welded on the lower flange of the I-beam, and a crane hole is welded in the center of the upper flange of the I-beam.
[0017] Furthermore, the hoisting auxiliary device also includes two cables, one of which passes sequentially through one of the pre-embedded hoisting points on the long side of the precast wing plate, one of the cable holes on the lower flange of the I-beam, and one of the pre-embedded hoisting points on the short side of the precast wing plate. Both ends of the cable are fixed to one of the pre-embedded hoisting points on the long side and one of the pre-embedded hoisting points on the short side of the precast wing plate.
[0018] Another cable passes through another pre-embedded lifting point on the long side of the precast wing plate, another cable hole on the lower flange of the I-beam, and another pre-embedded lifting point on the short side of the precast wing plate in sequence. The two ends of the cable are fixed to another pre-embedded lifting point on the long side and another pre-embedded lifting point on the short side of the precast wing plate.
[0019] The beneficial effects of this utility model are as follows:
[0020] 1. As the bottom slab of the side ditch (i.e., cast-in-place bottom slab), the precast wing slabs on both sides are connected into a whole to prevent water from seeping into the side ditch and to organize and centrally drain water.
[0021] 2. As the toe of each graded slope, it is used to reinforce the steps of the graded slope under the self-weight of the large volume of concrete, resist the sliding tendency of the upper soil, and converge the sliding surfaces of each graded slope to ensure the stability of the slope.
[0022] 3. As a capping beam for anti-slide piles, it connects all the anti-slide piles of the steps after grading on the same slope into a whole, forming a group pile synergistic anti-slide effect. Compared with the individual piles undertaking anti-slide tasks, it enhances the overall anti-slide effect of the anti-slide piles and effectively improves the reinforcement effect of the anti-slide piles on the slope.
[0023] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 A schematic diagram of the structure of a water collection and drainage ditch according to an embodiment of the present invention is shown;
[0026] Figure 2 A schematic diagram of the structure of each sliding surface according to an embodiment of the present invention is shown;
[0027] Figure 3 A top view of the step working plate and anti-slide pile according to an embodiment of the present invention is shown;
[0028] Figure 4 A schematic diagram of a prefabricated wing plate installed in a side ditch according to an embodiment of the present invention is shown;
[0029] Figure 5 A schematic diagram of the hoisting auxiliary device according to an embodiment of the present invention is shown;
[0030] Figure 6 An embodiment of the present utility model is shown. Figure 4 A schematic diagram of the structure of the slope drainage pipe and slope drainage ditch in the lateral direction. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0032] like Figure 1 As shown, this utility model provides a prefabricated water collection and drainage ditch, such as... Figure 2 As shown, the water collection and drainage ditch includes multiple tiers on a steep soil slope, with anti-slide piles 3 on each tier, wherein one anti-slide pile 3 is installed every N3 meters on each tier. Figure 2 As shown, the anti-slide pile 3 penetrates the side ditch 5.1 and passes through the graded slope slip surface 4.2; the top elevation of the anti-slide pile 3 is level with the step 1 on which it is located. The anti-slide pile (3) is installed using bored cast-in-place piles, and an example is given below:
[0033] Taking a steep soil slope with an elevation of 30m as an example, the following illustration illustrates the process: From the top of the slope downwards, a step is created for every 8m decrease in elevation. For example, step 1.1 is at elevation 22m, and the smaller slopes formed above it constitute the first-level slope; step 1.2 is at elevation 14m, and the smaller slopes formed above it constitute the second-level slope; and step 1.3 is at elevation 6m, and the smaller slopes formed above it constitute the third-level slope. The width of each step 1 is 1.5m. Excess soil above each step is removed, leveling the slope surface and forming several smaller slopes. These slope grading steps serve multiple purposes: they act as boundaries for the grading of the steep soil slope, dividing it into smaller slopes; they also serve as working surfaces for personnel and machinery; they provide locations for the anti-slide piles 3; and they act as drainage and embankment areas for the smaller slopes, maximizing the use of the limited horizontal area of the slope.
[0034] Lay step work slabs 2 on each step of the graded system, such as... Figure 3As shown, steel plates 1.5m wide and 5m long are used as the working slabs 2 for the steps. Each working slab 2 is laid with a 1m gap to provide space for the construction of anti-slide piles 3. Construction personnel and machinery can use the working slabs 2 as the working surface to construct the anti-slide piles 3 for steep slopes. The anti-slide piles 3 are bored cast-in-place piles with a diameter of 600mm. One anti-slide pile 3 is installed every N3 meters (e.g., 5 meters) along the direction of the steps. The anti-slide piles 3 penetrate the graded slope slip surface 4.2 to ensure anchoring of the soil above the graded slope slip surface 4.2, enhancing the slope's anti-slide stability. The top elevation of the anti-slide pile 3 is flush with the corresponding step 1, and it can later be used as support for the ditch cover 5.7. Figure 2 In the diagram, 4.1 represents the original slope slip surface, while 4.3, 4.4, and 4.5 represent the first, second, and third grade slope slip surfaces, respectively.
[0035] The water collection and drainage ditch also includes a multi-level stepped structure set on a high and steep soil slope. Each step has a ditch 5.1. The water collection and drainage ditch (5.1) is excavated on each step using the "reverse method". Specifically, after the excavator is in place, a step working plate (2) in front of the excavator bucket is removed, and the ditch (5.1) is excavated. After the excavation is completed, the excavator moves back by the step working plate (2) and continues to excavate. After the excavation is completed, the sides of the ditch (5.1) are flattened and compacted to provide a foundation for the installation of the precast wing plate (5.2).
[0036] like Figure 4 As shown, prefabricated wing plates 5.2 are fitted to the sides of the ditch 5.1. Geotextile is fully laid on both the prefabricated wing plates 5.2 and the ditch 5.1. Before installing the prefabricated wing plates 5.2, the geotextile is laid on the inner side of the ditch 5.1 as a water-resistant layer, with both ends extending out (e.g., 50cm) and inserted into the soil layer to secure it. The water-resistant layer forms an integral water barrier between the prefabricated wing plates 5.2 and the ditch 5.1, effectively preventing water collected in the ditch 5.1 from seeping back into the soil layer along the gaps. After the water-resistant layer is laid, the prefabricated wing plates 5.2 are hoisted and installed.
[0037] like Figure 4As shown, the precast wing plate 5.2 is L-shaped. For example, the precast wing plate can be 1m high, 0.2m long at the bottom, and 6cm thick. It is precast with concrete of strength not less than C30 to ensure that the strength of the lightweight component meets the requirements. The precast wing plate 5.2 has a wing plate reinforcing corner 5.2.3 at the corner of the structure. For example, the thickness is 15cm. The angle between the side and bottom of the precast wing plate 5.2 is the same as the angle of the side ditch 5.1, forming an arc-shaped inner corner. By forming an arc-shaped inner corner at the corner, the structural strength of the precast wing plate 5.2 at the turning point is increased, avoiding damage to weak points of the component due to impacts during hoisting and installation.
[0038] To facilitate on-site hoisting and installation, the length of each precast wing plate 5.2 can be set to 3m, for example. Multiple stiffening ribs 5.2.1 are evenly spaced on the inner side of each precast wing plate 5.2. For example, one stiffening rib 5.2.1 is placed every 1m on the inner side of each precast wing plate 5.2, meaning two stiffening ribs 5.2.1 are evenly distributed on each precast wing plate 5.2. For example, the stiffening ribs 5.2.1 are 5cm thick and 20cm wide, used to enhance the structural strength of the long side of the precast wing plate 5.2 and prevent concrete cracking on the long side of the precast wing plate 5.2 due to impacts during hoisting and installation. During precasting of the precast wing plate 5.2, the stiffening ribs 5.2.1 and the precast wing plate 5.2 are cast integrally to form a single unit.
[0039] To facilitate the hoisting and installation of the precast wing plate 5.2, multiple embedded hoisting points 5.2.2 are provided on the precast wing plate 5.2. For example, four embedded hoisting points 5.2.2 are provided, and each is 1m away from the longitudinal axis of symmetry (N6 meters). In this case, the two upper embedded hoisting points 5.2.2 are 5cm away from the upper edge of the long side, and the two lower embedded hoisting points 5.2.2 are 10cm away from the outer edge of the short side. During hoisting, the cables are connected through the four embedded hoisting points to adjust the spatial orientation of the precast wing plate 5.2 so that the precast wing plate 5.2 can be installed close to the side ditch 5.1.
[0040] In addition, the present invention also provides a hoisting system for a prefabricated water collection and drainage ditch, the hoisting system including a hoisting auxiliary device (5.4), which is used to hoist and install the prefabricated wing plate 5.2. The structure of the hoisting auxiliary device 5.4 is as follows: Figure 5 As shown, it includes an I-beam and some welded lifting holes. For example, a 1.5m long I-beam has two cable holes 5.4.1 symmetrically welded on the lower flange of the I-beam, with a spacing of 0.3m between the two cable holes 5.4.1. A crane hole 5.4.2 is welded in the center of the upper flange of the I-beam.
[0041] like Figure 5As shown, the hoisting auxiliary device (5.4) also includes two cables. One cable passes sequentially through one of the pre-embedded hoisting points 5.2.2 on the long side of the precast wing plate 5.2, one of the cable holes 5.4.1 on the lower flange of the I-beam, and one of the pre-embedded hoisting points 5.2.2 on the short side of the precast wing plate 5.2. Both ends of the cable are fixed to one of the pre-embedded hoisting points 5.2.2 on the long side and one of the pre-embedded hoisting points 5.2.2 on the short side of the precast wing plate 5.2. The other cable passes sequentially through another pre-embedded hoisting point 5.2.2 on the long side of the precast wing plate 5.2, another cable hole 5.4.1 on the lower flange of the I-beam, and another pre-embedded hoisting point 5.2.2 on the short side of the precast wing plate 5.2. Both ends of the cable are fixed to another pre-embedded hoisting point 5.2.2 on the long side and another pre-embedded hoisting point 5.2.2 on the short side of the precast wing plate 5.2.
[0042] The precast wing plate 5.2 is lifted through the crane hole 5.4.2. By adjusting the position of the I-beam on the cable, the spatial angle of the precast wing plate 5.2 can be adjusted so that the precast wing plate 5.2 is parallel to the side of the side ditch 5.1 and is installed close to the side of the side ditch 5.1.
[0043] In some embodiments of this utility model, after the precast wing plate 5.2 is installed, a cast-in-place base plate 5.5 is poured. The cast-in-place base plate 5.5 is constructed using a concrete casting method. For example, the cast-in-place base plate 5.5 is made of C15 strength concrete with a thickness of 50cm. The cast-in-place base plate 5.5 is poured within the inner space of the precast wing plate 5.2 (pouring to a specified height, not exceeding the height of the side ditch 5.1, such as one-third of the height of the side ditch 5.1), to ensure that the self-weight of the concrete can meet the load requirements of the step, while also meeting the anchorage length of the anti-slip pile 3, thereby enhancing the bond strength of the cast-in-place base plate 5.5 to the anti-slip pile 3.
[0044] After pouring, the concrete is vibrated and cured. Once the concrete reaches its design strength, cement mortar is used to create an arched slope at intervals of N4 meters on the cast-in-place base slab, for example, 60 meters per section, to form a drainage slope. Figure 6 As shown, the central position of the drainage slope is raised by 10cm from the original concrete top elevation, and then the elevation is uniformly lowered to 0m on both sides for a length of 30m, thus forming a drainage slope, which is conducive to the rapid and organized drainage of the water collection and drainage ditch. At the same time, cement mortar is used to fill the gaps in the overlap of the precast wing plates 5.2.
[0045] like Figure 4As shown, the precast wing plate 5.2 is provided with a first reserved hole 5.2.4 and a second reserved hole 5.2.5. The first reserved hole 5.2.4 is located above the second reserved hole 5.2.5. In addition, the water collection and drainage ditch also includes a ditch drainage pipe 5.6. The second reserved hole 5.2.5 is connected to the ditch drainage pipe 5.6 through the drainage pipe. The first reserved hole 5.2.4 is connected to the slope drainage ditch 6 set on the slope surface above the corresponding step. After the cast-in-place base slab 5.5 is constructed, the first reserved hole 5.2.4 as the slope drainage ditch 6 and the second reserved hole 5.2.5 as the ditch drainage pipe 5.6 are respectively opened on the precast wing plate 5.2 on the side of each ditch 5.1. An example is given below:
[0046] like Figure 6 As shown, at the position where the drainage slope elevation of the arched slope is 0, a hole with a diameter of 20cm is opened on the side near where the side ditch drainage pipe 5.6 is laid, as the second reserved hole 5.2.5 of the side ditch drainage pipe 5.6. On the corresponding precast wing plate 5.2, a side ditch drainage pipe 5.6 is set every N8 meters, for example, 60m. Centered on the highest point of the arched slope, for example 10cm, a hole with a diameter of 20cm is opened on one side near the slope drainage ditch 6. A hole with a diameter of 20cm is then opened every N7 meters (e.g., 10m) on both sides, serving as the first reserved hole 5.2.4 for the slope drainage ditch 6. The first reserved hole 5.2.4 is located above the second reserved hole 5.2.5. Subsequently, the slope drainage ditch 6 can be positioned and installed according to the first reserved hole 5.2.4. A drainage pipe extends out from the slope toe 5 through the second reserved hole 5.2.5 and connects to the side ditch drainage pipe 5.6. The side ditch drainage pipe 5.6 is a 20cm diameter PVC pipe that extends from top to bottom, allowing collected water to be discharged to the lowest point.
[0047] like Figure 4 As shown, a ditch cover plate 5.7 is provided on the ditch channel 5.1. Therefore, after the reserved holes are opened, the ditch cover plate 5.7 is placed on the completed water collection and drainage ditch (i.e., the ditch channel 5.1). The ditch cover plate 5.7 is made of 6cm thick C30 strength precast concrete. Supported by the precast wing plate 5.2 and the anti-slide pile 3, the ditch cover plate 5.7 can provide a working platform for personnel and machinery for the subsequent construction of the slope drainage ditch 6.
[0048] In addition, in some embodiments of this utility model, the slope drainage ditch includes a trench, a slope drainage pipe, a sand cushion layer, and a graded crushed stone covering layer. The trench is excavated on each graded slope surface, and a trench with a width of 50cm and a depth of 50cm is excavated every N4 (e.g., 10m). The bottom of the trench is fully covered with geotextile, with a width of 70cm for example. A specified height (e.g., 10cm) is tightly laid on each side wall of the trench as a water-proof and seepage-proof layer for the slope drainage ditch 6, effectively ensuring that the collected water is drained in an organized and concentrated manner along the direction of the slope drainage ditch 6.
[0049] A sand cushion layer is laid on the geotextile, using medium sand with a specified fineness modulus of 3.0~2.3 and an average particle size of 0.5~0.35mm, spread evenly along the slope drainage ditch 6, with a thickness of, for example, 10cm. A slope drainage pipe is installed centrally on the sand cushion layer, with its lower end inserted into the first pre-reserved hole 5.2.4, serving as the main channel for water collection and drainage in the slope drainage ditch 6. After the slope drainage pipe is installed, the remaining space in the slope drainage ditch 6 is filled with a graded crushed stone cover layer, using 1~30mm graded crushed stone, which is then compacted. Pore water in the slope surface soil layer seeps into the slope drainage pipe through the voids in the graded crushed stone cover layer under the influence of the water head difference. The drainage is then concentrated and organized along the slope direction through the slope drainage pipe, improving slope drainage efficiency while reducing uneven slope settlement and soil erosion caused by uneven drainage consolidation. It also provides a working surface for the later construction of the ecological slope protection structure.
[0050] This utility model discloses a prefabricated water collection and drainage ditch, employing a combined structure of "prefabricated wing plates + cast-in-place base plate." The wing plates on both sides of the ditch are prefabricated concrete components, while the base plate is cast-in-place concrete. This avoids the inconvenience of hoisting caused by the heavy weight of prefabricated components, improves construction efficiency, and saves construction time. Furthermore, it integrates the following three functions:
[0051] 1. As the bottom slab of the side ditch (i.e., the cast-in-place bottom slab), the precast wing plates 5.2 on both sides are connected into a whole to prevent water from seeping into the side ditch and to organize and centrally drain water.
[0052] 2. As the toe of each graded slope, it is used to reinforce the steps of the graded slope under the self-weight of the large volume concrete, resist the sliding tendency of the upper soil, and converge the sliding surfaces of each graded slope with the sliding surface of the graded slope 4.2, thus playing a role in ensuring the stability of the slope.
[0053] 3. As the capping beam of the anti-slide pile 3, it connects all the anti-slide piles 3 of the steps after the same slope is graded into a whole, forming a group pile synergistic anti-slide effect. Compared with the single pile undertaking the anti-slide task, it enhances the overall anti-slide effect of the anti-slide pile 3 and effectively improves the reinforcement effect of the anti-slide pile 3 on the slope.
[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.
Claims
1. A prefabricated water collection and drainage ditch, wherein, The water collection and drainage ditch includes a multi-tiered stepped structure on a steep soil slope, with a ditch channel (5.1) and anti-slide piles (3) on each step. The anti-slide pile (3) is set at N3-meter intervals on the step, and the anti-slide pile (3) penetrates the side ditch (5.1) and passes through the graded slope sliding surface (4.2). The side of the ditch (5.1) is equipped with a prefabricated wing plate (5.2), the prefabricated wing plate (5.2) and the side ditch (5.1) are fully covered with geotextile and extend out at both ends and insert into the soil layer; the side ditch (5.1) is provided with a ditch cover plate (5.7). The angle between the side and bottom edge of the precast wing plate (5.2) is the same as the angle of the side ditch (5.1). The precast wing plate (5.2) is provided with multiple pre-embedded lifting points (5.2.2). Multiple wing plate stiffening ribs (5.2.1) are placed at intervals on the inner side of the precast wing plate (5.2). The precast wing plate (5.2) is provided with a first reserved hole (5.2.4) and a second reserved hole (5.2.5). A cast-in-place base plate (5.5) is poured in the inner space of the precast wing plate (5.2).
2. A prefabricated water collection and drainage ditch according to claim 1, wherein, The prefabricated wing plate (5.2) is L-shaped, and the prefabricated wing plate (5.2) is provided with a wing plate reinforcing corner (5.2.3) at the corner of the structure, forming an arc-shaped inner corner; Each prefabricated wing plate (5.2) is provided with 4 pre-embedded lifting points (5.2.2), and the wing plate stiffening rib (5.2.1) is integrally formed with the prefabricated wing plate (5.2).
3. A prefabricated water collection and drainage ditch according to claim 1, wherein, The first reserved hole (5.2.4) is located above the second reserved hole (5.2.5).
4. A prefabricated water collection and drainage ditch according to claim 3, wherein, The water collection and drainage ditch also includes a ditch drainage pipe (5.6), and the second reserved hole (5.2.5) is connected to the ditch drainage pipe (5.6) through a drainage pipe; the first reserved hole (5.2.4) is connected to the slope drainage ditch (6) set on the slope surface above the corresponding step.
5. A prefabricated water collection and drainage ditch according to claim 4, wherein, On the cast-in-place base slab (5.5), there is a drainage slope formed by arching and slope repair every N4 meters. The second reserved hole (5.2.5) is located at the elevation 0 of the drainage slope.
6. A prefabricated water collection and drainage ditch according to claim 1, wherein, The top elevation of the anti-slide pile (3) is level with the elevation of the step on which it is located.
7. A prefabricated water collection and drainage ditch according to claim 1, wherein, The geotextile fully covered inside the side ditch (5.1) is tightly covered along the inner wall of the side ditch (5.1), with both ends extending out and inserted into the soil layer.
8. A prefabricated water collection and drainage ditch according to any one of claims 1-7, wherein, Each prefabricated wing plate (5.2) is equipped with 4 pre-embedded lifting points (5.2.2), which are arranged evenly and symmetrically in space. The distance of each of the 4 pre-embedded lifting points (5.2.2) from the longitudinal axis of symmetry is N6 meters.