Light and thin fabricated fiber concrete retaining wall

Abstract

The utility model relates to the technical field of assembly type concrete retaining walls, and discloses a light and thin assembly type fiber concrete retaining wall which comprises a vertical wall, a toe board, a heel board and an anti-collision guardrail, the toe board is located at the rear end of the bottom of the vertical wall, the heel board is located at the front end of the bottom of the vertical wall, and the vertical wall, the toe board and the heel board are integrally formed and manufactured. The vertical walls, the toe board and the heel board are made of reinforcing steel bars and fiber concrete, the anti-collision guardrail is used for connecting the adjacent vertical walls, and the anti-collision guardrail is fixedly connected with the bearing parts at the tops of the vertical walls. According to the scheme, through the structures of the vertical wall, the toe board and the heel board, the large foundation at the bottom of the wall body and the vertical face of the wall body jointly resist soil pressure, the soil pressure is dispersed on the upper portion of the wall body through the wall face cantilever effect, overturning or sliding of the wall body is effectively avoided, and various resistances of the structure are effectively improved; meanwhile, the thickness of components can be reduced, the self-weight of the structure is reduced, materials are reduced, and cost is reduced.

Description

A lightweight prefabricated fiber concrete retaining wall Technical Field

[0001] This utility model relates to the field of prefabricated concrete retaining wall technology, specifically to a lightweight prefabricated fiber concrete retaining wall. Background Technology

[0002] Conventional prefabricated concrete retaining walls suffer from a series of weaknesses, including high weight, brittleness, and low tensile strength, which limit their development. In contrast, lightweight prefabricated fiber-reinforced concrete retaining walls, with their superior mechanical properties, overcome these shortcomings and have been widely used in water conservancy projects, building construction, road and bridge engineering, railway engineering, and military engineering in my country.

[0003] Ordinary prefabricated concrete retaining walls are made of ordinary concrete (NC) as the matrix. The performance of the matrix itself determines the performance and size of the components. However, using ultra-high performance concrete (UHPC) as the matrix has higher material production costs and is more expensive. Moreover, the UHPC used in domestic UHPC-related projects often requires high-temperature steam curing, which can significantly increase construction difficulty and costs in actual projects.

[0004] High-performance fiber reinforced concrete (HPFRC), representing a new generation of concrete, is one of the most promising high-performance materials for 21st-century civil engineering. Designed and prepared based on principles such as close particle packing, a water-cement ratio of less than 0.25, and fiber reinforcement, it boasts a matrix compressive strength between C60 and C120. Compared to ordinary steel fiber reinforced concrete, it exhibits high strength, high durability, high toughness, high fluidity, and low shrinkage and creep. This allows for significant reductions in structural cross-sectional dimensions, lower structural self-weight, improved economic efficiency, and simplified construction processes. HPFRC is a green, environmentally friendly, material-saving, and energy-efficient building material with broad application prospects in ultra-thin structural components. Particularly in thin-walled, high-durability, and long-life structures, HPFRC's excellent mechanical properties enhance various structural resistances, effectively reducing component thickness and structural self-weight, thus enabling future structural development to cope with increasingly complex loads and environments. Compared to UHPC, HPFRC is a new type of high-performance steel fiber reinforced concrete material with a slightly lower compressive strength grade but comparable tensile mechanical properties and crack control capabilities. It typically does not require high-temperature curing and has a low cost.

[0005] Considering that projects requiring retaining walls typically involve harsh transportation and installation environments, making it difficult for large transport and hoisting equipment to access the site, smaller equipment is often necessary for construction. Given the limitations of smaller transport and hoisting equipment, if components are too heavy or too large, it will exceed their capacity, making construction impossible. Therefore, even with high-quality materials allowing for thinner components, the dimensions of individual components must still be limited. The dimensions of each component are rationally designed, and appropriate splicing methods are used to connect them into a unified load-bearing structure.

[0006] In conclusion, it is necessary to manufacture a new type of adjustable high-strength fiber-reinforced concrete (HPFRC) lightweight prefabricated fiber-reinforced concrete retaining wall with excellent mechanical and workability properties and low cost. This has significant engineering application value and high socio-economic benefits. Summary of the Invention

[0007] The present invention aims to provide a lightweight prefabricated fiber reinforced concrete retaining wall to solve the problems of poor quality of components in ordinary prefabricated concrete retaining walls and high cost of UHPC concrete components.

[0008] To achieve the above objectives, this utility model adopts the following technical solution: a lightweight prefabricated fiber concrete retaining wall, comprising: a vertical wall, a toe plate, a heel plate, and a crash barrier. The toe plate is located at the rear end of the bottom of the vertical wall, and the heel plate is located at the front end of the bottom of the vertical wall. The vertical wall, toe plate, and heel plate are integrally formed and are made of steel bars and HPFRC fiber concrete. The crash barrier is used to connect adjacent vertical walls. The crash barrier is fixedly connected to the top of the vertical wall. A protrusion is provided on the side of the top of the vertical wall, facing the heel plate. A support portion is provided on the top of the vertical wall. The support portion is integrally formed with the vertical wall and is connected to the crash barrier. A connecting steel bar is reserved at the connection end between the support portion and the crash barrier, and the connecting steel bar extends out of the support portion.

[0009] The principle of this scheme is as follows: First, a model is made in the prefabrication plant using PVC or steel plates, the reinforcing bars are tied, the connectors are placed in the corresponding positions of the model, and fiber-reinforced concrete is poured into the model to complete the fabrication of the vertical wall, toe plate, heel plate, and crash barrier; then, the vertical wall is assembled at the installation site using the crash barrier to complete the assembly of the concrete retaining wall.

[0010] Advantages of this solution: This prefabricated retaining wall, toe slab, and heel slab structure facilitates rapid fabrication and assembly of the retaining wall, significantly improving construction speed; the structure utilizes the large foundation (foundation foot) at the bottom of the wall and the vertical surface of the wall to jointly resist soil pressure, while the cantilever effect of the wall at the top disperses soil pressure, effectively preventing wall overturning or slippage and significantly improving the structure's resistance to various forces; simultaneously, it reduces component thickness, lightens the structure's self-weight, reduces material usage, and lowers costs.

[0011] Furthermore, the guardrail has protrusions, and the top of the vertical wall has grooves for mounting the protrusions. The guardrail and the vertical wall are connected by the cooperation of the protrusions and grooves, resulting in faster and simpler installation.

[0012] Furthermore, the groove is a through groove, which allows water to flow directly through, effectively removing moisture, reducing the impact of water pressure on the structure, and preventing moisture accumulation that could lead to leakage, corrosion, or settlement of the structure.

[0013] Furthermore, the groove is located within the top area of ​​the vertical wall. This enclosed groove enhances the overall integrity of the structure, avoiding the risk of moisture loss when pouring concrete to fix the crash barrier to the vertical wall; and because there is no through-slot opening, the structure itself is generally more robust and can better withstand external loads.

[0014] Furthermore, the width of the crash barrier is greater than the top width of the retaining wall. To connect the retaining wall and the crash barrier, some reinforcing bars will extend from the top of the retaining wall. Since the crash barrier is wider than the top width of the retaining wall, the top reinforcing bars of the retaining wall can be encased during concrete pouring, making the retaining wall more aesthetically pleasing and protecting the reinforcing steel structure from exposure and corrosion.

[0015] Further defining the structure, it also includes a rib plate located at the bottom front end of the vertical plate, which is integrally formed with the vertical wall and the heel plate. By setting the rib plate, the contact area of ​​the retaining wall foundation is increased, soil pressure is dispersed, and the resistance to sliding and overturning is improved, thereby enhancing the stability and bearing capacity of the foundation and ensuring the long-term safety and stability of the entire retaining wall structure.

[0016] Furthermore, the cross-section of the prism plate is triangular. The triangular prism plate increases the contact area at the front end of the retaining wall foundation, thereby increasing the foundation's resistance to sliding. The triangular shape at the front end of the foundation allows soil pressure to be evenly distributed towards the bottom, effectively reducing the risk of foundation sliding; it also facilitates water flow and drainage, preventing water accumulation at the front end of the wall foundation and reducing water pressure on the wall and its negative impact on the foundation; the shape of the prism plate helps prevent erosion of the foundation and the front of the wall by external forces (such as water flow or wind), especially under conditions of soil erosion or heavy rain, thus improving the long-term stability of the retaining wall.

[0017] Further specified, the retaining wall is wedge-shaped, with its width decreasing and then increasing along the direction of the crash barrier. This design, where the upper width is smaller than the lower width, increases the load-bearing area at the base, making the wall more stable under lateral soil pressure and preventing overturning or sliding. The wider foundation lowers the center of gravity of the retaining wall, helping to resist lateral forces from the upper soil and thus enhancing structural stability. The increased width of the retaining wall ensures a larger connection area between it and the crash barrier, making the connection more stable. This also reduces material usage, lowering the structure's weight and production costs.

[0018] Furthermore, the two sides of the vertical wall that contact the adjacent vertical wall are respectively provided with matching connecting protrusions and connecting grooves. The connecting protrusions and connecting grooves enable quick positioning and installation of adjacent vertical walls, resulting in faster installation speed.

[0019] Furthermore, the toe plate and the heel plate are of the same thickness. Attached Figure Description

[0020] Figure 1 is a structural schematic diagram of an embodiment of the present invention containing a vertical wall.

[0021] Figure 2 is a structural schematic diagram of an embodiment of this utility model containing two vertical walls. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] The reference numerals in the accompanying drawings include: 1. Vertical wall, 2. Toe plate, 3. Heel plate, 4. Crash guardrail, 5. Prism plate.

[0024] Example:

[0025] A lightweight prefabricated fiber-reinforced concrete retaining wall, as shown in Figures 1 and 2, includes: a vertical wall 1, a toe plate 2, a heel plate 3, and a crash barrier 4.

[0026] The toe plate 2 is located at the rear end of the bottom of the vertical wall 1, and the heel plate 3 is located at the front end of the bottom of the vertical wall 1. The vertical wall 1, toe plate 2, and heel plate 3 are integrally formed and are made of steel reinforcement and fiber-reinforced concrete. In the prefabrication plant, a model is made using PVC or steel plates, the steel reinforcement is tied, the connectors are placed in the corresponding positions on the model, and the fiber-reinforced concrete is poured into the model to complete the fabrication of the vertical wall 1, toe plate 2, and heel plate 3. This prefabricated structure of the vertical wall 1, toe plate 2, and heel plate 3 facilitates the rapid fabrication and assembly of the retaining wall, greatly improving construction speed. Through the structure of the vertical wall 1, toe plate 2, and heel plate 3, the large foundation at the bottom of the wall and the vertical surface of the wall work together to resist soil pressure, and the cantilever effect of the wall surface at the top disperses soil pressure, effectively preventing the wall from overturning or sliding, and effectively improving the various resistances of the structure. At the same time, it can reduce the thickness of components, reduce the self-weight of the structure, reduce material usage, and lower costs.

[0027] The toe plate 2 and the heel plate 3 have the same thickness.

[0028] The crash barrier 4 is used to connect adjacent vertical walls 1, and is fixedly connected to the top of the vertical wall 1. At the installation site, the vertical walls 1 are assembled using the crash barrier 4 to complete the assembly of the concrete retaining wall. The length of the crash barrier 4 is an integer multiple of the length of the vertical wall 2.

[0029] The crash barrier 4 has protrusions, and the top of the vertical wall 1 has grooves for installing the protrusions. The crash barrier 4 and the vertical wall 1 are connected by the cooperation of the protrusions and grooves, resulting in faster and simpler installation. The grooves are through grooves, allowing water to flow directly through, effectively draining moisture, reducing the impact of water pressure on the structure, and preventing moisture accumulation that could lead to leakage, corrosion, or settlement. Alternatively, the grooves can be non-through grooves, located within the top area of ​​the vertical wall 1. These closed grooves enhance the overall structural integrity, avoiding the risk of moisture loss when pouring concrete to fix the crash barrier 4 and the vertical wall 1; and because there are no through groove openings, the structure itself is generally more robust and can better withstand external loads. Specifically, the top side of the vertical wall 1 has a protrusion facing the heel plate, and the top of the vertical wall 1 has a support portion integrally formed with the vertical wall 1. The support portion is connected to the crash barrier 4. In this embodiment, the groove for installing the protrusion is set on the support portion, and the connection end between the support portion and the crash barrier 4 has a pre-reserved connecting steel bar, which extends out of the support portion. The support portion at the top of the vertical wall 1 and the crash barrier 4 have pre-reserved connecting steel bars, and the final post-cast strip connects the two into one, ensuring the integrity and load-bearing capacity of the structure.

[0030] The width of the crash barrier 4 is greater than the top width of the retaining wall 1. In order to connect the retaining wall 1 and the crash barrier 4, some steel bars will extend from the top of the retaining wall 1. The width of the crash barrier 4 is greater than the top width of the retaining wall 1. This way, when pouring concrete, the top steel bars of the retaining wall 1 can be covered inside, making the retaining wall more aesthetically pleasing and protecting the steel structure, avoiding exposure and corrosion of the steel bars.

[0031] The retaining wall 1 is wedge-shaped, with its width decreasing and then increasing along the direction of the crash barrier 4. This design, where the upper width of the retaining wall 1 is smaller than its lower width, increases the load-bearing area at the base, making the wall more stable under lateral soil pressure and preventing overturning or sliding. The wider foundation also lowers the center of gravity of the retaining wall, helping to resist lateral forces from the upper soil and thus enhancing structural stability. The increased width of the retaining wall 1 ensures a larger connection area between it and the crash barrier 4, making the connection more stable. Furthermore, it reduces material usage, lowers structural weight, and lowers production costs.

[0032] The two sides of the vertical wall 1 that contact the adjacent vertical wall 1 are respectively provided with matching connecting protrusions and connecting grooves. The connecting protrusions and connecting grooves enable quick positioning and installation of the adjacent vertical wall 1, resulting in faster installation.

[0033] It also includes a prism plate 5, which is located at the bottom front end of the vertical plate and is integrally formed with the vertical wall 1 and the heel plate 3. By setting the prism plate 5, the contact area of ​​the retaining wall foundation is increased, soil pressure is dispersed, and the resistance to sliding and overturning is improved, thereby enhancing the stability and bearing capacity of the foundation and ensuring the long-term safety and stability of the entire retaining wall structure.

[0034] The cross-section of the prism plate 5 is triangular. This triangular shape increases the contact area at the front end of the retaining wall foundation, thereby enhancing its resistance to sliding. The triangular shape at the foundation front end ensures a uniform distribution of soil pressure towards the bottom, effectively reducing the risk of foundation slippage. It also facilitates water flow and drainage, preventing water accumulation at the front end of the foundation and reducing water pressure on the wall and its negative impact on the foundation. Furthermore, the shape of the prism plate 5 helps prevent erosion of the foundation and front of the wall by external forces (such as water flow or wind), particularly under conditions of soil erosion or heavy rain, thus improving the long-term stability of the retaining wall.

[0035] This solution also provides a method for preparing the aforementioned retaining wall, specifically including the following steps:

[0036] Step 1: Prepare C80 fiber-reinforced concrete at the prefabrication plant.

[0037] C80 fiber-reinforced concrete (HPFRC fiber-reinforced concrete) is used for preparation. This concrete has both high compressive strength and high tensile strength after cracking, which can reduce the size and weight of precast components. At the same time, it is much cheaper than ultra-high performance concrete, which can better control costs.

[0038] C80 fiber-reinforced concrete aggregate includes natural or machine-made extra-fine aggregate, fine aggregate, and coarse aggregate. The particle size of the extra-fine aggregate is 0–0.2 mm (0.15 mm in this embodiment), the particle size of the fine aggregate is 0.2–5 mm (3 mm in this embodiment), and the particle size of the coarse aggregate is 5–16 mm (13 mm in this embodiment). A premix is ​​prepared, comprising cementitious materials, silica fume, water, and a water-reducing agent. The premix comprises the following components in parts by weight: 100 parts cementitious materials (cement), 30 parts silica fume, 30 parts finely ground quartz powder, 134 parts quartz sand, 20 parts water, and 0.5 parts high-efficiency water-reducing agent. Fine aggregates such as sea sand, river sand, and mountain sand can be used in concrete; granite, limestone, and sandstone can be processed into coarse aggregates of different particle sizes for use in concrete; various types of cement, such as ordinary Portland cement, slag Portland cement, and sulfoaluminate cement, serve as cementing materials for concrete; slag produced by steel enterprises can be processed into slag powder and used as an auxiliary cementing material in concrete to improve its performance; fly ash can be used as an auxiliary cementing material to improve the workability and durability of concrete; and various types of concrete admixtures, such as water-reducing agents, retarders, and early-strength agents, can improve the workability and performance of concrete.

[0039] Specifically, the preparation process of C80 fiber reinforced concrete includes: selecting raw materials, screening them using a square-hole sieve to obtain ultra-fine aggregates, fine aggregates, and coarse aggregates of a predetermined diameter, and then using a roller press to shape them to obtain ultra-fine aggregates, fine aggregates, and coarse aggregates of a predetermined particle size. Premixing is then prepared, including cementitious materials, silica fume, water, and a water-reducing agent. The C80 fiber reinforced concrete aggregates and premixing are added to a mixer, first dry-mixed for 1-2 minutes (2 minutes in this embodiment), then water is added and mixed for 3-5 minutes (5 minutes in this embodiment) until the material reaches a fluidized state. Steel fibers are added to the mixer and mixing continues for 3-5 minutes (4 minutes in this embodiment) to form HPFRC concrete. The preparation of HPFRC concrete refers to existing technologies.

[0040] In this scheme, C30 concrete was used to construct the retaining wall, and the results were compared with those of the C80 concrete used in this scheme. Seven sets of retaining walls were constructed, and the dimensions of the seven sets of retaining walls are shown in Table 1.

[0041] Table 1 Retaining Wall Dimensions

[0042]

[0043] The performance tests were conducted according to the following standards: strain testing, stress testing, and displacement testing were performed according to GB / T50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete". The test results are shown in Table 2 below.

[0044] Table 2 Stress, Strain, and Displacement

[0045] Strain at the base of the retaining wall; Stress at the base of the retaining wall / Tensile design strength; Displacement at the top of the retaining wall (mm) C80-10.0 10.5 2.1; C80-20.0 10.5 1.9; C80-30.0 10.5 1.7; C80-40.0 10.5 1.5; C80-50.0 10.5 1.4; C80-60.0 10.5 1.3; C80-70.0 10.5 1.2; C30-10.0 10.6 2.0; C30-20.0 10.6 1.8; C30-30.0 10.6 1.6; C30-40.0 10.6 1.3; C30-50.0 10.6 1.2; C30-60.0 10.6 1.1; C30-70.0 10.6 1.0 surface

[0046] All data for the seven retaining walls of C80 are superior to those of the seven retaining walls of C30. Therefore, the performance of C80 concrete is better than that of C30. This scheme can improve the various resistances of the structure, effectively reduce the thickness of the components, reduce the self-weight of the structure, and provide the possibility for the further development of engineering structures to cope with more complex loads and environments in the future.

[0047] The premixed materials and aggregates in this scheme can be made from local materials, reducing the preparation and transportation costs of HPFRC materials. This enables the industrialization of new bridges based on high-performance structural materials, reducing production volume and raw material resource consumption by more than 30%, keeping initial construction and installation costs the same, and reducing life-cycle maintenance costs by more than 30%. The prepared HPFRC materials have excellent mechanical properties, which can improve various resistances of the structure, effectively reduce component thickness, and reduce the structure's self-weight. Starting from the design of materials and component dimensions, the self-weight of the structure is reduced, thereby improving the structure's adaptability to the construction environment and its performance, increasing economic benefits, and simplifying construction processes. It is a green, environmentally friendly, material-saving, and energy-saving method for the fabrication and installation of structural components, with very broad application prospects in road bridges and building sites with harsh construction and usage environments.

[0048] Step 2: At the prefabrication plant, make retaining wall and crash barrier templates of different sizes and tie the steel bars inside the templates.

[0049] Step 3: Pour C80 fiber concrete into the formwork to construct retaining walls (vertical wall 1, toe plate 2 and heel plate 3) and crash barriers 4. The retaining walls are prefabricated in 2-meter sections, and the crash barriers are prefabricated in 4-8 meter sections.

[0050] In this step, the preferred length of the crash barrier 4 is 4 meters.

[0051] In this step, the retaining wall and crash barrier 4 need to be transported to the construction site after the concrete has been properly cured and reached a strength of over 90%. After the foundation treatment of the retaining wall is carried out on site, a 10cm thick C15 cement concrete pad is laid first, and then the retaining wall is hoisted in. After the retaining wall is installed and the settlement is stable, the crash barrier 4 is hoisted in, with the barrier flush with the outer side of the retaining wall. The connecting steel bars are staggered and tied together with additional longitudinal steel bars.

[0052] Step 4: After the concrete has been left to stand for 24 hours at a temperature of 15-25℃ and a relative humidity of >50%, the formwork is removed. Then, it is cured under standard curing conditions of 18-22℃ and a relative humidity of >95% until the specified age and the strength reaches more than 90%. After that, it is transported to the construction site. After the retaining wall foundation is treated on site, a 10cm thick C15 cement concrete pad is laid first, and then the retaining wall is hoisted into place.

[0053] Step 5: After the vertical wall 1, toe plate 2 and heel plate 3 are installed and settled, the crash barrier 4 is hoisted and flush with the outer side of the retaining wall. The connecting steel bars are staggered and tied with the newly added longitudinal steel bars. After tying, the pouring strip baffle is installed and poured with C80 self-leveling concrete.

[0054] In this step, the retaining wall is installed first. After the retaining wall has settled and stabilized, the crash barrier 4 is hoisted and the steel bars are connected.

[0055] Step 6: After the concrete strength of the post-cast strip reaches more than 90%, backfill the soil behind the wall.

[0056] In this step, the post-pouring strip is poured using C80 self-leveling cement concrete. This cement concrete material has the characteristics of automatic leveling, can be compacted without vibration, and has high strength and good impermeability.

[0057] This scheme utilizes a structure consisting of vertical wall 1, toe slab 2, and heel slab 3. By leveraging the large foundation (foundation foot) at the base of the wall and the vertical surface of the wall to jointly resist soil pressure, and dispersing soil pressure through cantilever action at the top of the wall, it effectively prevents wall overturning or slippage and significantly improves the structure's resistance to various stresses. This prefabricated structure of vertical wall 1, toe slab 2, and heel slab 3 facilitates rapid fabrication and assembly of the retaining wall, greatly increasing construction speed. Adjacent vertical walls 1 are connected by crash barriers 4, which also provide protection for the corresponding reinforcing steel bars of vertical wall 1. This reduces component thickness, lightens the structure's self-weight, reduces material usage, and lowers costs, enabling the prefabricated components to be smaller and thinner. This provides possibilities for the further development of retaining wall structures to cope with more complex loads and environments.

[0058] The above descriptions are merely embodiments of this utility model, and common technical solutions and / or characteristics known in the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The scope of protection claimed in this application shall 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 lightweight, prefabricated fiber-reinforced concrete retaining wall, characterized in that, include: The wall includes a vertical wall, a toe plate, a heel plate, and a crash barrier. The toe plate is located at the rear end of the bottom of the vertical wall, and the heel plate is located at the front end of the bottom of the vertical wall. The vertical wall, toe plate, and heel plate are integrally formed and made of reinforced concrete. The crash barrier is used to connect adjacent vertical walls and is fixedly connected to the top of the vertical wall. The top side of the vertical wall has a protrusion facing the heel plate. The top of the vertical wall has a support portion, which is integrally formed with the vertical wall and connected to the crash barrier. A connecting steel bar is reserved at the connection end between the support portion and the crash barrier, and the connecting steel bar extends out of the support portion.

2. The lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 1, characterized in that: The guardrail has protrusions, and the top of the wall has a groove for installing the protrusions.

3. A lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 2, characterized in that: The groove is a through groove.

4. A lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 2, characterized in that: The groove is located within the top area of ​​the vertical wall.

5. A lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 1, characterized in that: The width of the crash barrier is greater than the width of the top of the vertical wall.

6. A lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 1, characterized in that: It also includes a prism plate, which is located at the bottom front end of the upright plate and is integrally formed with the upright wall and the heel plate.

7. A lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 6, characterized in that: The cross-section of the prism plate is triangular.

8. A lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 1, characterized in that: The vertical wall is wedge-shaped.

9. A lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 1, characterized in that: The two sides of the vertical wall that come into contact with the adjacent vertical wall are respectively provided with matching connecting protrusions and connecting grooves.

10. A lightweight prefabricated fiber-reinforced concrete retaining wall according to claim 1, characterized in that: The toe plate and heel plate are of the same thickness.

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