A prefabricated device for slope protection in civil engineering and water conservancy projects

Abstract

This invention discloses a prefabricated slope protection device for civil engineering projects, comprising several hollow triangular prisms. Each prism has a pouring space within it, and each prism has a first opening on both sides connecting to the pouring space. An inner core is located within the pouring space, and several guide columns are mounted on the inner core. One end of each guide column is connected to the top wall of the inner prism, and the other end is connected to the upper surface of the inner core. The triangular prisms are interconnected and together form a single column. The pouring spaces of the triangular prisms are interconnected through the first openings. Baffles are detachably connected to both sides of the column, forming a receiving space. The inner cores of the triangular prisms within this receiving space are interconnected and together form a core. The core is detachably connected to the baffles on both sides. Several pouring holes are located on the upper surface of the column. This invention solves the problem of the difficulty in timely changing the length of prefabricated slopes by altering the overall column length.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering technology, specifically a prefabricated device for slope protection in civil engineering and water conservancy projects. Background Technology

[0002] Civil engineering is an applied science involving the design, construction, and maintenance of infrastructure such as roads, bridges, tunnels, dams, canals, embankments, drainage systems, and water supply systems. Its purpose is to meet the needs of social and economic development while protecting the natural environment and public safety. A slope, on the other hand, refers to a sloped surface with a certain gradient created on both sides of a roadbed to ensure its stability. Slopes are commonly used to prevent rainwater erosion, stabilize soil, maintain soil and water balance, and ensure the stability of the roadbed and slope. Slopes can be classified according to their formation as artificial slopes and natural slopes; according to geological lithology as soil slopes and rock slopes; and according to their service life as permanent slopes and temporary slopes.

[0003] However, the construction of traditional artificial slopes often requires transporting materials such as stones, sand, and cement to the destination, and then having construction workers stack or pave the stones to create a sloping surface. The slope construction process is cumbersome and complex, with a relatively long construction period, and needs improvement.

[0004] To address the aforementioned problems, Chinese Patent Publication No. CN109736333A discloses a prefabricated slope, comprising a slope body with an inclined slope surface. A dovetail strip is vertically installed on one side of the slope body, and a groove for the dovetail strip to be inserted into is provided on the other side of the slope body, along with a dovetail slot connecting the lower end of the groove and also for the dovetail strip to be inserted. A sliding hole is provided on the slope surface connecting to the groove, and a sliding rod for pressing the upper end of the dovetail strip is slidably connected within the sliding hole. A locking part for fixing the sliding rod is provided within the sliding hole. This invention has the following advantages and effects: by setting up a prefabricated slope with interlocking sections, the construction of slopes on both sides of roads can be completed, replacing traditional stacking or paving methods, making the slope construction process more convenient and faster, thereby achieving the effect of convenient construction and shortening the construction period.

[0005] While the aforementioned precast slopes can basically meet the requirements, the length of the slope is fixed during the slope construction process. If there are errors in the measurement process, the length of the slope produced by the precast slope will be difficult to change quickly. In other words, the aforementioned precast slopes have the problem that the length of the precast slope is difficult to change in a timely manner. Summary of the Invention

[0006] To address the problem of difficulty in timely modification of the length of precast slopes, this invention provides a precast slope protection device for civil engineering and water conservancy projects.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A prefabricated slope protection device for civil engineering and water conservancy projects includes several hollow triangular prisms, each with a pouring space inside. Each triangular prism has a first opening on both sides connecting to the pouring space. An inner core is provided within the pouring space, and several guide pillars are provided on the inner core. One end of each guide pillar is connected to the inner top wall of the triangular prism, and the other end is connected to the upper surface of the inner core. A tenon is provided on one side of each triangular prism, and a mortise is provided on the other side. By inserting the tenon of one triangular prism into the mortise of another, the triangular prisms are interconnected and together form a column assembly. The pouring spaces of the several triangular prisms are interconnected through the first openings. A baffle for blocking the first opening is detachably connected to both sides of the column assembly. The baffle and the column assembly together form an accommodating space. The inner cores of the several triangular prisms within the accommodating space are interconnected through detachable connections and together form a core assembly. Both sides of the core assembly are detachably connected to the baffle. Several pouring holes are provided on the upper surface of the column assembly. One end of each pouring hole is connected to the outside, and the other end is connected to the interior of the accommodating space.

[0008] The principles and beneficial effects of the basic scheme are as follows:

[0009] During construction, workers pour cement into the pouring holes inside the column. The cement fills the internal space of the column under gravity. Because there are several inner cores and guide columns inside the column, the positions of the inner cores and guide columns will not be filled with cement but will be left open. After the cement dries and cools, the left open space and the filled cement will become the precast slope. Also, because there are baffles at both ends of the column to block the first opening, the cement that enters the column will not flow out from the first opening on both sides of the column.

[0010] When construction workers need to lengthen or shorten the length of the precast slope, because the column as a whole is composed of several triangular columns connected in series by mortise and tenon joints, and the internal cores within the column as well are also connected in series by detachable joints, construction workers can change the length of the precast slope made by the column as a whole by adjusting the number of triangular columns and internal cores simultaneously. In other words, construction workers can controllably lengthen or shorten the length of the precast slope.

[0011] In summary, this invention can solve the problem of the difficulty in timely changing the length of precast slopes by altering the overall length of the column.

[0012] Furthermore, the top wall of the triangular prism is provided with evaporation holes, one end of which is connected to the outside and the other end of which is connected to the inside of the triangular prism.

[0013] The principles and beneficial effects of the basic scheme are as follows:

[0014] Compared to a triangular prism without evaporation holes, the moisture in the cement inside the triangular prism will flow out to the external environment more quickly through the evaporation holes. Therefore, the evaporation hole structure in this invention has a better drying effect on the cement inside the triangular prism.

[0015] Furthermore, several through holes are opened on the surface of the inner core. One end of the through hole is connected to the upper surface of the inner core, and the other end of the through hole is connected to the lower surface of the inner core. There is a barrier membrane layer inside the through hole that only allows water droplets to pass through.

[0016] The principles and beneficial effects of the basic scheme are as follows:

[0017] Because, compared to a core without holes, the cement moisture laid flat on top of the core will flow through the holes in the cement to the bottom of the core, instead of remaining in the gap between the core and the cement and being difficult to evaporate, the core's perforated structure can accelerate the drying and molding of the cement.

[0018] At the same time, because the through hole is fixed with a barrier layer that only allows water droplets to pass through, cement will not be able to drip down through the through hole, meaning that the through hole structure will not affect the final shape of the slope.

[0019] Furthermore, the guide post is hollow inside, and there are openings on the upper and lower sides of the guide post that connect to the interior. The upper opening of the guide post connects to the evaporation hole, and the lower opening of the guide post connects to the through hole on the upper surface of the inner core.

[0020] The principles and beneficial effects of the basic scheme are as follows:

[0021] Because, compared to a guide post without an opening, the moisture in the gap where the guide post and the inner core surface are in contact with each other will pass through the guide post opening to the evaporation hole and then be released from the evaporation hole to the outside of the triangular prism, the guide post structure of the present invention can accelerate the evaporation of moisture in the gap of the inner core of the guide post.

[0022] Furthermore, an air pump is provided between the guide post and the inner core. One end of the air pump is fixedly connected to the top of the guide post, and the air pump output end is located between the guide post and the inner core. A power supply is also provided at the top of the triangular prism, and the power supply output end is electrically connected to the air pump input end.

[0023] The principles and beneficial effects of the basic scheme are as follows:

[0024] Because compared to when there is no air pump between the guide post and the inner core, the air pump will generate gas in the gap between the guide post and the inner core. The gas can increase the gas flow and carry away more water vapor. Therefore, the present invention can accelerate the drying efficiency of cement by using an air pump.

[0025] Furthermore, the bottom of the triangular prism has several seepage holes, one end of which is connected to the inside of the triangular prism and the other end is connected to the outside. A filter screen is fixed inside the seepage hole.

[0026] The principles and beneficial effects of the basic scheme are as follows:

[0027] Compared to a triangular prism without drainage holes, the water in the cement poured into the triangular prism will be deposited at the bottom of the prism under the action of gravity and flow out from the drainage holes. Therefore, this invention can accelerate the drying of cement.

[0028] At the same time, the filter screen on the seepage hole can block cement and prevent cement from flowing out of the triangular prism from the seepage hole.

[0029] Furthermore, an observation port is opened on the side wall of the baffle, which connects to the interior of the triangular prism. The observation port includes an inlet and an outlet. A transparent plastic plate is fixed at the inlet of the observation port, and a waterproof baffle is fixed at the outlet of the observation port. A gap is left between the plastic plate and the waterproof baffle.

[0030] The principles and beneficial effects of the basic scheme are as follows:

[0031] Compared to the sidewall of the baffle without an observation port, the observation port on the sidewall allows construction workers to see the cement level inside the triangular prism through the branch pipe. Therefore, the amount of cement injected into the triangular prism can be more accurately controlled through the observation port.

[0032] Meanwhile, because a plastic plate and a waterproof baffle are installed at the observation port, the cement inside the triangular prism will be blocked and will not flow out from the observation port.

[0033] At the same time, because there is a gap between the waterproof barrier and the plastic board, the cement will only come into contact with the waterproof barrier and will not dirty the plastic board or obstruct the construction workers' view.

[0034] Furthermore, the plastic plate is provided with scale strips, which are distributed vertically along the plastic plate.

[0035] The principle and beneficial effects of the basic solution are as follows: Compared with plastic boards without scale strips, construction workers can more intuitively judge the situation inside the triangular prism by looking at the scale strips on the plastic board. Therefore, the scale strip design on the plastic board of this invention can reduce the difficulty of construction workers' work. Attached Figure Description

[0036] Figure 1 A 3D diagram of a prefabricated slope protection device for civil engineering and water conservancy projects.

[0037] Figure 2 This is a plan view of a prefabricated slope protection device for civil engineering and water conservancy projects.

[0038] Figure 3 for Figure 1 Cross-sectional view of triangular prism A.

[0039] Figure 4 A cross-sectional view of a prefabricated slope for use in civil engineering and water conservancy projects.

[0040] Figure 5 for Figure 1 Schematic diagram of the mortise and tenon structure. Detailed Implementation

[0041] The following detailed description illustrates the specific implementation method:

[0042] The reference numerals in the accompanying drawings include: triangular prism 1, first baffle 2, second baffle 3, inner core 4, casting space 5, guide post 6, casting hole 7, tenon 8, mortise 9, evaporation hole 10, through hole 11, air pump 12, seepage hole 13, plastic plate 14, and waterproof baffle 15.

[0043] Example 1

[0044] The basics are as follows: Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 As shown: A prefabricated slope protection device for civil engineering and water conservancy projects includes several triangular prisms 1. Each triangular prism 1 has a casting space 5 inside. Each triangular prism has a first opening on both sides that connects to the casting space. The casting space 5 of the triangular prism 1 contains an inner core 4. The upper surface of the inner core 4 is provided with several guide posts 6. In this embodiment, there are 3 guide posts 6 inside the triangular prism 1. One side of the guide post 6 is detachably connected to the inner top wall of the triangular prism 1 by a thread, and the other side of the guide post 6 is detachably connected to the upper surface of the inner core 4 by a thread. One side of the triangular prism 1 is provided with a tenon 8, and the other side of the triangular prism 1 is provided with a mortise 9. In this embodiment, there are 2 triangular prisms 1, which are divided into triangular prism A and triangular prism B. The construction workers connect triangular prism A and triangular prism B to each other by inserting the tenon 8 of triangular prism A into the mortise 9 of triangular prism B, thereby forming a detachable structure, and making triangular prism A and triangular prism B together form a column whole.

[0045] The casting spaces 5 of triangular prism A and triangular prism B are connected to each other through the first opening, thereby enabling the casting spaces 5 inside triangular prism A and triangular prism B to be interconnected.

[0046] Combined with appendix Figure 1As shown (the left side is triangular prism A, and the right side is triangular prism B), the left end of triangular prism A is provided with a first baffle 2. The side wall of the first baffle 2 is provided with a tenon 8 corresponding to the mortise 9 on triangular prism A. The construction workers connect the first baffle 2 and triangular prism A to form a detachable structure by inserting the tenon 8 on the first baffle 2 into the mortise 9 on triangular prism A. The right end of triangular prism B is provided with a second baffle 3. The side wall of the second baffle 3 is provided with a mortise 9 corresponding to the tenon 8 on triangular prism B. The construction workers connect the second baffle 3 and triangular prism B to form a detachable structure by inserting the mortise 9 on the second baffle 3 into the tenon 8 on triangular prism B. At this time, the first baffle 2, triangular prism A, triangular prism B and the second baffle 3 together constitute an accommodating space.

[0047] Combined with appendix Figure 2 As shown (the left side is triangular prism A, and the right side is triangular prism B), the left end of the inner core 4 of triangular prism A is detachably connected to the first baffle 2 by a thread, the right end of the inner core 4 of triangular prism A is detachably connected to the left end of the inner core 4 of triangular prism B by a thread, and the right end of the inner core 4 of triangular prism B is detachably connected to the second baffle 3 by a thread. The inner core 4 of triangular prism A and the inner core 4 of triangular prism B together form a core unit.

[0048] The column has several casting holes 7 on its surface. One end of the casting hole 7 is connected to the outside, and the other end of the casting hole 7 is connected to the accommodating space inside the column.

[0049] The specific implementation process is as follows:

[0050] The first baffle 2, the column as a whole, the core as a whole, and the second baffle 3 form a whole. When the construction workers pour cement into the pouring hole 7 on the upper surface of the column as a whole, because one end of the pouring hole 7 is connected to the outside and the other end of the pouring hole 7 is connected to the accommodating space inside the column as a whole, the cement poured into the pouring hole 7 will fill the entire accommodating space under the action of gravity. Also, because there are several inner cores 4 and several guide columns 6 inside the column as a whole, the positions of the inner cores and guide columns 6 will not be filled with cement but will be reserved. After the cement dries and cools, the reserved space and the cement filled inside the column as a whole will become the precast slope.

[0051] Furthermore, because the column, which is composed of triangular prisms A and B connected in series, has baffles that are detachably connected to both ends by threads, and the baffles together with the column form an accommodating space, the cement entering the column will not flow out from the first opening on both sides.

[0052] When construction workers need to lengthen or shorten the length of the precast slope, since the column as a whole is composed of several detachable triangular columns 1 and the core as a whole is composed of several detachable inner cores 4, the construction workers can simultaneously increase or decrease the number of triangular columns 1 and inner cores 4, so that the overall length of the triangular columns 1 and inner cores 4 increases or decreases synchronously. The length of the precast slope poured by the construction workers through cement will change accordingly, that is, the construction workers can controllably lengthen or shorten the length of the precast slope.

[0053] In summary, this invention can solve the problem of the difficulty in timely changing the length of precast slopes by altering the overall length of the column.

[0054] Example 2

[0055] Another embodiment of this application is basically as shown in the appendix. Figure 2 As shown, the difference from the above embodiment is that: the top wall of the triangular prism 1 is provided with an evaporation hole 10, one end of the evaporation hole 10 is connected to the outside, and the other end of the evaporation hole 10 is connected to the inside of the triangular prism 1.

[0056] The specific implementation process is as follows:

[0057] When cement enters the triangular prism 1 through the pouring hole 7, if no treatment is done, the cement in the sealed space will have difficulty draining the water, and the cement full of water will be difficult to dry quickly. At this time, because the top wall of the triangular prism 1 is provided with evaporation holes 10, the cement inside the triangular prism 1 will flow out to the external environment through the evaporation holes 10. Therefore, compared with the triangular prism 1 without evaporation holes 10, the evaporation hole 10 structure in this invention has a better drying effect on the cement inside the triangular prism 1.

[0058] Example 3

[0059] Another embodiment of this application is basically as shown in the appendix. Figure 2 As shown, the difference from the above embodiment is that: a plurality of through holes 11 are opened on the surface of the inner core, one end of the through hole 11 is connected to the upper surface of the inner core, and the other end of the through hole 11 is connected to the lower surface of the inner core. A barrier membrane layer that only allows water droplets to pass through is bonded inside the through hole 11. In this embodiment, the barrier membrane layer is a permeable geotextile.

[0060] The specific implementation process is as follows:

[0061] When the triangular prism 1 is filled with cement, the cement moisture located above the inner core may be deposited on the upper surface of the inner core. If no treatment is done, the moisture deposited on the upper surface of the inner core may not be able to evaporate quickly through the evaporation holes 10 above the triangular prism 1. At this time, because the inner core surface is provided with several through holes 11 connecting the upper and lower surfaces of the inner core, the moisture in the cement will drip down along the through holes 11 under the action of gravity to the bottom of the inner core, accelerating the drying and molding of the cement. At the same time, because the through holes 11 are fixed with a barrier layer that only allows water droplets to pass through, the cement will not be able to drip down through the through holes 11. That is, the through hole 11 structure will not affect the final slope molding shape.

[0062] Example 4

[0063] Another embodiment of this application is basically as shown in the appendix. Figure 2 As shown, the difference from the above embodiment is that the guide post 6 is hollow inside, and the upper and lower sides of the guide post 6 are respectively provided with second openings that connect to the interior. The second opening at the upper end of the guide post 6 is connected to the evaporation hole 10, and the second opening at the lower end of the guide post 6 is connected to the through hole 11 on the upper surface of the inner core.

[0064] The specific implementation process is as follows:

[0065] When the triangular prism 1 is filled with cement, because the guide post 6 and the inner core surface are in contact with each other, there may be gaps at the contact points. Therefore, the moisture in the cement may remain in the gaps and be difficult to evaporate. At this time, because the guide post 6 is hollow inside and has a second opening at each end of the guide post 6 that connects to the inside, the moisture in the gap between the guide post 6 and the inner core can enter along the second opening at the lower end of the guide post 6 and flow out from the second opening at the upper end of the connecting evaporation hole 10. Therefore, the guide post 6 structure of the present invention can accelerate the evaporation of moisture in the gap between the inner core of the guide post 6.

[0066] Example 5

[0067] Another embodiment of this application is basically as shown in the appendix. Figure 2 As shown, the difference from the above embodiment is that an air pump is provided between the guide post 6 and the inner core. In this embodiment, the air pump model is TNY21-4D2. One end of the air pump is fixedly connected to the top of the guide post 6 by a thread. The air pump output end is located between the guide post 6 and the inner core. A power supply is also fixed to the top of the triangular column 1 by a thread. In this embodiment, the power supply model is YSN-120HK. The power supply output end is electrically connected to the air pump input end.

[0068] The specific implementation process is as follows:

[0069] Because the air pump generates gas at the gap between the guide post 6 and the inner core, and the gas can increase the gas flow and carry away more water vapor, the present invention can accelerate the drying efficiency of cement by means of the air pump compared to the guide post 6 without an air pump.

[0070] Example 6

[0071] Another embodiment of this application is basically as shown in the appendix. Figure 2 As shown, the difference from the above embodiment is that: the bottom of the triangular prism 1 has several seepage holes, one end of which is connected to the inside of the triangular prism 1 and the other end of which is connected to the outside. A filter screen is attached to the inside of the seepage hole. In this embodiment, the filter screen is a gauze filter screen that is prone to seepage of cement.

[0072] The specific implementation process is as follows:

[0073] When cement fills the triangular prism 1, the water in the cement will be deposited at the bottom of the triangular prism 1 under the action of gravity. If no treatment is done, the water deposited at the bottom of the triangular prism 1 may not be able to evaporate quickly. At this time, the seepage hole at the bottom of the triangular prism 1 can flow out of the triangular prism 1 through the water in the cement under the action of gravity, and the filter screen on the seepage hole can block the cement and prevent the cement from flowing out of the triangular prism 1 from the seepage hole.

[0074] Example 7

[0075] Another embodiment of this application is basically as shown in the appendix. Figure 1 As shown, the difference from the above embodiment is that: an observation port connected to the interior of the triangular prism 1 is opened on the side wall of the baffle. The observation port includes an inlet and an outlet. A transparent plastic plate 14 is fixed to the inlet of the observation port by threads, and a waterproof baffle 15 is fixed to the outlet of the observation port by threads. A gap is left between the plastic plate 14 and the waterproof baffle 15.

[0076] The specific implementation process is as follows:

[0077] Because construction workers cannot see the inside of the triangular prism 1 with the naked eye when pouring cement into it, if the cement is poured too full, it will overflow from the gaps and through holes 11, increasing the difficulty of the construction workers' work. At this time, the transparent plastic plate allows the construction workers to observe the inside of the triangular prism 1 with the naked eye, and the amount of cement poured into the triangular prism 1 can be controlled. Therefore, the present invention can reduce the difficulty of the construction workers' work by using a transparent plastic baffle.

[0078] Example 8

[0079] Another embodiment of this application differs from the above embodiments in that: a scale strip is provided on the plastic plate, and the scale strip is distributed vertically along the plastic plate.

[0080] The specific implementation process is as follows:

[0081] When construction workers observe the water level changes inside the triangular prism through the plastic plate, they cannot clearly perceive these changes with the naked eye. They may only realize that the water level is almost full, but not know exactly how high it is. In other words, they cannot accurately judge the water level. The scale strips on the plastic plate can help construction workers gain a clear understanding of the water level. Therefore, compared to a plastic plate without scale strips, construction workers can more intuitively judge the situation inside the triangular prism 1 through the scale strips on the plastic plate. Thus, the scale strip design on the plastic plate of this invention can reduce the difficulty of the construction workers' work.

[0082] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A prefabricated device for slope protection in civil engineering and water conservancy projects, characterized in that: The structure comprises several hollow triangular prisms, each with a pouring space inside. Each prism has a first opening on one side leading to the pouring space. Within the pouring space is an inner core, on which several guide pillars are mounted. One end of each guide pillar connects to the top wall of the inner prism, and the other end connects to the upper surface of the inner core. Each prism has a tenon on one side and a mortise on the other. The prisms are interconnected by inserting the tenon of one prism into the mortise of another, forming a single column. The pouring spaces of the prisms are interconnected through the first openings. Each column has a detachable baffle on one side to block the first opening. The baffles and the column together form a receiving space. Within this receiving space, the inner cores of the prisms are detachably connected to each other, forming a core. The core is detachably connected to the baffles on both sides. The upper surface of the column has several pouring holes, one end of which connects to the outside, and the other end connects to the inside of the receiving space. The guide post is hollow inside, and there are openings on the upper and lower sides of the guide post that connect to the interior. The upper opening of the guide post connects to the evaporation hole, and the lower opening of the guide post connects to the through hole on the upper surface of the inner core. The side wall of the baffle has an observation port that leads to the interior of the triangular prism. The observation port includes an inlet and an outlet. A transparent plastic plate is fixed at the inlet of the observation port, and a transparent waterproof baffle is fixed at the outlet of the observation port. A gap is left between the plastic plate and the waterproof baffle.

2. The prefabricated slope protection device for civil engineering and water conservancy projects according to claim 1, characterized in that: The top wall of the triangular prism is equipped with an evaporation hole, one end of which is connected to the outside and the other end of which is connected to the inside of the triangular prism.

3. The prefabricated slope protection device for civil engineering projects according to claim 2, characterized in that: Several through holes are opened on the surface of the inner core. One end of the through hole is connected to the upper surface of the inner core, and the other end of the through hole is connected to the lower surface of the inner core. There is a barrier membrane layer inside the through hole that only allows water droplets to pass through.

4. The prefabricated slope protection device for civil engineering projects according to claim 3, characterized in that: An air pump is installed between the guide post and the inner core. One end of the air pump is fixedly connected to the top of the guide post, and the output end of the air pump is located between the guide post and the inner core. A power supply is also installed at the top of the triangular prism, and the power supply output end is electrically connected to the air pump input end.

5. The prefabricated slope protection device for civil engineering projects according to claim 4, characterized in that: The bottom of the triangular prism has several seepage holes. One end of each seepage hole is connected to the inside of the triangular prism, and the other end is connected to the outside. A filter screen is fixed inside each seepage hole.

6. The prefabricated slope protection device for civil engineering projects according to claim 5, characterized in that: The plastic sheet has graduated strips that are distributed vertically along the sheet.

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