CN221052662U - Multi-stage reinforced earth retaining wall with composite panel - Google Patents

Abstract

The utility model provides a composite panel multistage reinforced earth retaining wall, which relates to the technical field of railway roadbed and comprises a foundation engineering, a panel foundation, a reinforced inclusion, a connecting part and a wall top structure. The panel is arranged outside the foundation engineering in a stepped manner; the panel foundation is arranged at the bottom of the panel; the reinforcement materials are paved in the foundation engineering, and adjacent reinforcement materials are arranged in parallel; the reinforcement inclusion is arranged between adjacent reinforcement materials; the two ends of the connecting component are fixedly connected with the composite panel and the reinforced inclusion respectively; the support engineering comprises lateral constraint piles; the wall top structure is arranged at the top of the foundation engineering. The panel is arranged in a stepped mode, multistage layering can be carried out according to actual soil retaining requirements, limited space is fully utilized, and the panel is combined with the cast-in-situ concrete slab by adopting the prefabricated panel, so that the construction process is simplified, and the construction efficiency is improved.

Description

Multi-stage reinforced earth retaining wall with composite panel

Technical Field

The utility model relates to the technical field of railway roadbeds, in particular to a composite panel multistage reinforced retaining wall.

Background

Railway roadbed engineering has an important role in modern traffic construction and carries the running safety and stability of railway lines. With the continuous development of railway traffic, the conditions of limited land for high-fill railway roadbed engineering are increasing. Most of the existing railway retaining wall structures are single-stage reinforced earth retaining walls, and the wall height is generally smaller than 10m. However, single-stage retaining walls have some problems, and for roadbed engineering with large wall height, the single-stage retaining walls are not economical and reasonable enough, have high manufacturing cost and occupy a large amount of land resources. Secondly, the slope collecting effect of the single-stage retaining wall is limited, the special requirements of engineering are difficult to meet, and the problem of insufficient slope stability is easily caused.

In order to solve the above-mentioned drawbacks of the prior art, a multi-stage reinforced retaining wall with composite panels is needed.

Disclosure of utility model

The utility model aims to provide a multi-stage reinforced earth retaining wall with a composite panel, so as to solve the problems. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

The application provides a multi-stage reinforced retaining wall with a composite panel, which comprises the following components: foundation engineering, panels, panel foundations, reinforced inclusion, connecting parts and wall top structures. The panel is arranged outside the foundation engineering in a stepped manner; the panel foundation is arranged at the bottom of the panel; the reinforcement materials are paved in the foundation engineering, and adjacent reinforcement materials are arranged in parallel; the reinforced inclusion is arranged between adjacent reinforced materials; the two ends of the connecting part are fixedly connected with the panel and the reinforced inclusion respectively; the support engineering comprises lateral constraint piles which are arranged on the end face of the panel foundation far away from the foundation engineering; the wall top structure is arranged at the top of the foundation engineering.

Further, the panel includes at least three combined type panel and at least two hierarchical platform, and is three combined type panel is adjacent pass through between the combined type panel hierarchical platform is connected, the combined type panel includes at least two prefabricated panels and cast-in-place concrete slab, the prefabricated panel sets up the combined type panel outside, adjacent combined type panel head and the tail fixed connection, cast-in-place concrete slab sets up the prefabricated panel with add the muscle inclusion between.

Further, a first embedded bar is arranged at the top of the prefabricated panel, a bolt hole matched with the first embedded bar is formed in the bottom of the prefabricated panel, the prefabricated panel is adjacent to the first embedded bar and fixedly connected with the bolt hole, and the prefabricated panel is fixedly connected with the cast-in-situ concrete slab.

Further, the first embedded bars are 8 HRB400 bars with the diameter of 20 mm.

Further, the prefabricated panel comprises second embedded bars, the second embedded bars are arranged on one side, close to the cast-in-situ concrete slab, of the prefabricated panel, the connecting component comprises anchoring connecting bars and reinforcing mesh, the reinforcing mesh is arranged inside the cast-in-situ concrete slab, the anchoring connecting bars are arranged between adjacent reinforcing mesh inclusions, the second embedded bars are fixedly connected with the reinforcing mesh, and the anchoring connecting bars are fixedly connected with the reinforcing mesh.

Further, the second embedded bars are 7 rectangular bar rings with the diameter of 16mm, and the exposed parts of all the rectangular bar rings exceed the inner side surface of the prefabricated panel by 10cm.

Further, the gradient of the classifying platform is 4%.

Further, the rib material is a unidirectional stretching geogrid.

Further, the reinforced inclusion is sand gravel filled by adopting a water-permeable geotechnical bag.

Further, the wall top structure comprises a cap stone and a sealing layer, wherein the sealing layer is arranged at the top of the foundation engineering, and the sealing layer is fixedly connected with the panel through the cap stone.

The beneficial effects of the utility model are as follows:

The multi-layer reinforced structure comprises reinforced materials, reinforced inclusion bodies and the like, so that the anti-seismic performance of the retaining wall is effectively improved, the retaining wall is more stable and reliable under the condition of natural disasters such as earthquakes, the panels are arranged in a stepped mode, multistage layering can be carried out according to actual retaining requirements, limited space is fully utilized, efficient utilization of the retaining wall is achieved, the prefabricated panels are combined with cast-in-situ concrete plates, the construction process is simplified, the construction efficiency is improved, and time and labor cost are saved.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a multi-stage reinforced earth retaining wall of a composite panel according to the present application;

FIG. 2 is an enlarged view of the portion I in FIG. 1;

FIG. 3 is an enlarged view at II in FIG. 1;

fig. 4 is a schematic structural view of the prefabricated panel.

The marks in the figure: 1. foundation engineering; 2. a panel; 21. a composite panel; 211. prefabricating a panel; 2111. the first embedded steel bar; 2112. the second embedded steel bars; 212. cast-in-situ concrete slab; 22. a grading platform; 3. a panel foundation; 4. a reinforcement material; 5. a reinforced inclusion; 6. a connecting member; 61. anchoring the connecting steel bars; 62. a reinforcing mesh; 7. supporting engineering; 8. a wall top structure; 81. a hat stone; 82. and a sealing layer.

Description of the embodiments

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the present embodiment provides a multi-stage reinforced retaining wall with composite panels. The wall top structure comprises a foundation engineering 1, a panel 2, a panel foundation 3, at least two reinforcements 4, a reinforced inclusion 5, a connecting part 6, a supporting engineering 7 and a wall top structure 8. The design of the retaining wall is to prevent soil body from sliding and landslide so as to protect personnel and property. In the design of retaining walls, the foundation works 1 play an important role in bearing and supporting the retaining wall system. The foundation engineering 1 is located inside the retaining wall, provides a firm foundation support, and ensures the stability and the earthquake resistance of the whole retaining wall. The panel 2 is arranged outside the foundation engineering 1 in a stepped manner. The stepped arrangement of the panels 2 enables multistage arrangement according to the actual soil retaining height, thereby achieving effective utilization of space, and particularly, under limited field conditions, giving full play to the function of the retaining wall. The panel foundation 3 is arranged at the bottom of the panel 2; the reinforcement materials 4 are paved in the foundation engineering 1, and adjacent reinforcement materials 4 are arranged in parallel; the reinforcement package 5 is arranged between the adjacent reinforcement materials 4; the panel foundation 3 is located at the bottom of the panel 2 and provides a solid support for the panel 2. The rib materials 4 are paved inside the foundation engineering 1, and adjacent rib materials 4 are arranged in parallel to play a role in reinforcing soil bodies. The reinforcement package 5 is disposed between the adjacent reinforcement materials 4, and further increases the overall stability of the retaining wall by reinforcing the soil. The two ends of the connecting part 6 are respectively fixedly connected with the panel 2 and the reinforcement package 5. The connecting member 6 has sufficient strength and stability to ensure that the retaining wall is not loosened or displaced when subjected to an external force. The supporting engineering 7 comprises lateral constraint piles which are arranged on the end face of the panel foundation 3, far away from the foundation engineering 1, and play a role in limiting the lateral sliding and deformation of the soil body, so that the stability of the retaining wall is further improved. The wall top structure 8 is arranged at the top of the foundation engineering 1, and provides complete top sealing for the retaining wall.

Preferably, as shown in fig. 1 and 2, the panel 2 comprises at least three composite panels 21 and at least two grading platforms 22, the three composite panels 21 being connected between adjacent composite panels 21 by the grading platforms 22. The composite panel 21 is a core part of the retaining wall, which provides the retaining wall with better compression and slip resistance through a multi-layered arrangement. The composite panels 21 are connected through the grading platform 22, and the connection mode enables each layer of panels 2 to be mutually connected to form a whole, so that the stability and bearing capacity of the whole retaining wall are improved. The composite panel 21 comprises at least two prefabricated panels 211 and cast-in-situ concrete slabs 212, wherein the prefabricated panels 211 are arranged on the outer sides of the composite panels 21, and the adjacent composite panels 21 are fixedly connected end to end. The prefabricated panels 211 are disposed at the outer sides of the composite panels 21, and the adjacent composite panels 21 are tightly combined by the fixed connection of the prefabricated panels 211, thereby increasing the overall rigidity of the retaining wall. The cast-in-situ concrete slab 212 is arranged between the prefabricated panel 211 and the reinforced inclusion 5, and the reinforced concrete slab is arranged on the reinforced panel 2, and meanwhile, a firm concrete reinforcing layer can be formed in the retaining wall, so that the compression resistance and the skid resistance of the retaining wall are further improved. Through the composite design of the panel 2, the retaining wall disclosed by the utility model can form a plurality of reinforced walls at different heights while maintaining the overall stability, so that the horizontal pressure of a soil body is effectively shared, the pressure concentration of the retaining wall is reduced, and the stability and the safety of the whole retaining wall are improved. In addition, the use of the prefabricated panel 211 can also reduce the dependence of the construction site on concrete pouring, quicken the construction progress and save time and labor cost.

Preferably, as shown in fig. 1, 2 and 4, the top of the prefabricated panel 211 is provided with first pre-buried reinforcing bars 2111, which are already fixed in the prefabricated panel 211 during the manufacturing process of the prefabricated panel 211. These pre-buried bars serve to strengthen the overall structure of the prefabricated panel 211, making it more resistant to bending and torsion. At the same time, these pre-buried bars also provide convenience in connection with the adjacent prefabricated panels 211. The bottom of prefabricated panel 211 is provided with the bolt hole with first buried bar 2111 complex, and adjacent prefabricated panel 211 passes through first buried bar 2111 and bolt hole fixed connection. These dowel holes are voids that mate with the rebars so that adjacent panels 211 can be easily aligned and inserted into one another during installation, thereby creating a secure connection. This connection is simple and quick, and ensures tight connection between the prefabricated panels 211, increasing the overall rigidity and stability of the entire retaining wall. Precast panel 211 is fixedly attached to cast-in-place concrete slab 212. Further, the prefabricated panels 211 serve as both an integral part of the panel 2 and as a form for cast-in-place concrete.

Preferably, as shown in fig. 4, the first pre-buried bar 2111 is 8 HRB400 bars having a diameter of 20 mm. HRB400 is a common reinforcement brand for concrete, which has high strength and good plasticity and is suitable for reinforcing concrete structures. The HRB400 steel bars are used in the multi-stage reinforced earth retaining wall with the composite panel, so that sufficient strength and toughness can be provided, and the retaining wall is not easy to break or damage when being acted by external force.

Preferably, as shown in fig. 4, the prefabricated panel 211 includes second embedded bars 2112, the second embedded bars 2112 are disposed on one side of the prefabricated panel 211 near the cast-in-situ concrete slab 212, the connecting member 6 includes an anchor connecting bar 61 and a reinforcing mesh 62, the reinforcing mesh 62 is disposed inside the cast-in-situ concrete slab 212, the anchor connecting bar 61 is disposed between adjacent reinforced inclusions 5, the second embedded bars 2112 are fixedly connected with the reinforcing mesh 62, and the anchor connecting bar 61 is fixedly connected with the reinforcing mesh 62. The reinforcing measures such as the second embedded bars 2112, the reinforcing mesh 62, the anchoring connection bars 61 and the like act on the prefabricated panel 211 and the cast-in-situ concrete slab 212 together, so that the composite panel multistage reinforced earth retaining wall can maintain higher stability and safety when facing complex soil pressure and load conditions. The structural design and the connecting mode fully consider the rigidity and the strength required by the retaining wall, and provide reliable guarantee for the practical application of the retaining wall.

Preferably, as shown in fig. 4, the second pre-buried reinforcement 2112 is formed as 7 rectangular reinforcement rings with a diameter of 16mm, and the exposed parts of all the rectangular reinforcement rings extend 10cm beyond the inner side surface of the prefabricated panel 211. The purpose of this kind of setting is in order to increase the bonding area between reinforcing bar and the concrete, improves the power transmission effect of reinforcing bar to more effectively with concrete and reinforcing bar collaborative work, form an holistic reinforced structure. Meanwhile, the exposed portion of the reinforcing bar ring beyond the inner side of the prefabricated panel 211 can also provide adhesion force to the surface of the retaining wall to a certain extent, increase frictional resistance of the retaining wall, and further improve stability of the retaining wall. The design of this kind of rectangle reinforcing bar ring and the setting that surpasss the medial surface for compound panel multistage reinforced earth barricade can bear and disperse the load more reliably when facing horizontal load and retaining pressure, effectively prevents that the barricade from producing deformation and unstability. Meanwhile, the design also improves the anti-seismic performance of the retaining wall, reduces the damage of the earthquake to the retaining wall, and provides good guarantee for the long-term use and the safety of the retaining wall.

Preferably, the grade of the grading platform 22 is 4% as shown in FIG. 1. The grade of the grading platform 22 is determined by factors such as the height of the retaining wall and the terrain conditions. The transition between the platform and the ground can be more gentle due to the smaller gradient, so that the collapse and erosion of soil are reduced, and the stability of the retaining wall structure is maintained. Excessive gradients may result in large platform elevations, which are detrimental to soil retention and drainage, and may increase retaining wall pressure and risk of tipping. Through setting up the grading platform 22 slope of 4%, can be on the whole stability of balanced retaining wall and the basis that soil kept, reduce the difference in height of retaining wall moderately for the outward appearance of compound multistage reinforced earth retaining wall of panel is more pleasing to the eye and regular. In addition, proper slope can also help the drainage, reduces the accumulation of water on the barricade, prevents that water pressure from causing the influence to the barricade.

As shown in fig. 1 and 2, the tendon 4 is a unidirectionally stretched geogrid. The rib material 4 in the utility model adopts a high-density polyethylene (HDPE) unidirectional stretching geogrid. The geogrid is a geosynthetic material and has higher tensile strength and deformation resistance. In the setting of barricade, use geogrid of different grade type and length to satisfy the reinforcement demand of not co-altitude barricade. Specifically, for the portion of the retaining wall with the height less than 6.0m, a type II geogrid with the length of 6.0m is adopted, and the vertical interval is 0.6m. For the part of the retaining wall with the height of 6.0-10.0 m, a II-type geogrid with the length of 10.0m is adopted, and the vertical interval is 0.6m. For the part of the retaining wall with the height of 10.0 m-16.0 m, a two-stage retaining wall is realized, and the two-stage retaining walls are sequentially arranged from top to bottom: 12 layers of 10m long type I geogrids, the vertical interval is 0.6m, then 6 layers of 12m long type II geogrids, the vertical interval is 0.6m, and finally the vertical interval is reduced to 0.3m. For the part of the retaining wall with the height of 16.0 m-24.0 m, three-level retaining walls are realized, and the three-level retaining walls are sequentially arranged from top to bottom: 12 layers of 10m long type I geogrids, the vertical spacing is 0.6m, then 6 layers of 12m long type II geogrids, the vertical spacing is 0.6m, then 12 layers of 12m long type II geogrids, the vertical spacing is reduced to 0.3m, and finally 22 layers of 16m long type II geogrids, and the vertical spacing is also reduced to 0.3m. And in the range of 0.6m vertical distance of the retaining wall, supplementary auxiliary ribs are also arranged for further reinforcing the retaining wall structure. The auxiliary ribs adopt geogrids with the length of 6.0m, wherein the length of the turnup is not less than 2.0m, and the longitudinal tensile strength is not less than 120KN/m. The composite panel multistage reinforced earth retaining wall can effectively enhance the tensile property and stability of the retaining wall by adopting geogrids with different types and lengths and arranging the supplementary auxiliary ribs, is suitable for retaining projects with different heights, and improves the overall safety and reliability of the retaining wall. Meanwhile, the geogrid using the high-density polyethylene has excellent corrosion resistance and durability, and can maintain stability and reliability in long-term use.

As shown in fig. 1, 2 and 3, the reinforced inclusion 5 is sand gravel packed with water permeable geotextile bags. Preferably, the reinforced inclusion 5 in the utility model adopts a water-permeable geotechnical bag to fill sand gravel, and the design requirements comprise that the filling width of the geotechnical bag is not less than 40cm, and the concrete material index and the size requirement of the geotechnical bag are met. To ensure the performance of the reinforced inclusion 5, the sand gravel in the geotextile bag needs to have good gradation, i.e., the fine particle content of 0.075mm or less should be less than 5% while its permeability coefficient should not be less than 10-3cm/s. The design can ensure that the reinforced inclusion 5 has good water permeability in the retaining wall structure, so that the retaining wall can effectively drain water and resist water seepage, and the stability and durability of the whole structure are enhanced.

As shown in fig. 2, the wall top structure 8 comprises a cap stone 81 and a sealing layer 82, the sealing layer 82 is arranged on the top of the foundation engineering 1, and the sealing layer 82 is fixedly connected with the composite panel 21 through the cap stone 81. The closing layer 82 is tightly combined with the face plate 2 by a fixed connection with the cap stone 81, thereby forming an integrally stable wall top structure 8. The cap stone 81 is the upper part of the wall top, typically a transverse solid stone or concrete member, used to cover the top of the retaining wall and provide additional protection and stability. The setting of cap stone 81 can increase the whole aesthetic property of barricade, also can prevent that the foreign object from getting into the barricade structure inside simultaneously, plays the guard action. By attaching the closing layer 82 to the cap stone 81, the wall top structure 8 is fixed to the panel 2 so that the retaining wall becomes a stable whole. The design ensures the structural stability and durability of the baffle wall, so that the baffle wall can effectively resist external pressure and influence in long-term use. Meanwhile, the setting of the wall top structure 8 can also reduce water seepage and loss inside the retaining wall and prolong the service life of the retaining wall.

Further, the embodiment also provides a construction method of the composite panel multistage reinforced earth retaining wall. The construction steps are as follows: firstly, constructing a culvert on a construction site to avoid the influence of excavation of a culvert foundation on retaining wall engineering. And then carrying out site leveling, ground intercepting and draining, arranging lateral constraint piles, and carrying out screw pile construction. And then, the substrate is replaced with AB group filler, and the concrete strip foundation is paved after compacting. Paving a geogrid on the foundation, connecting the wrapping and folding part with the paved geogrid by using a connecting rod, tensioning the stressed grid, and fixing by using a U-shaped nail. Then, the soil is filled in layers and compacted. Embedding the steel bar with the galvanized angle steel with the suffix, carrying out staggered construction according to the designed height, and repeating the steps of reinforcing and filling the soil until all the construction is completed. After the reinforcement inclusion 5 at each level is monitored to be deformed stably, a precast slab is installed, a rectangular reinforcing steel bar ring reserved by the precast slab is welded to be connected with a reinforcing steel bar net 62, and a water drain hole PVC pipe is arranged according to design requirements. Then, the panels 2 are constructed by retaining walls step by step, and finally, the concrete cap stone 81 and the step concrete closing layer 82 are constructed. In the construction process, the test elements are buried synchronously, and monitoring data are fed back and analyzed in time. Through the construction method, the multi-stage reinforced earth retaining wall with the composite panel can be effectively constructed, and the requirements on stability and durability are met.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A composite panel multi-stage reinforced retaining wall, comprising:

Foundation engineering (1);

The panel (2) is arranged outside the foundation engineering (1) in a stepped manner;

A panel foundation (3), wherein the panel foundation (3) is arranged at the bottom of the panel (2);

the reinforced inclusion (5), the said reinforced inclusion (5) is set up in the foundation engineering (1);

The two ends of the connecting component (6) are fixedly connected with the panel (2) and the reinforced inclusion (5) respectively; and

And the wall top structure (8) is arranged at the top of the foundation engineering (1).

2. The composite panel multi-stage reinforced retaining wall of claim 1, wherein: the panel (2) comprises at least three composite panels (21) and at least two grading platforms (22), wherein three composite panels (21) are adjacent, the composite panels (21) are connected through the grading platforms (22), each composite panel (21) comprises at least two prefabricated panels (211) and a cast-in-situ concrete slab (212), each prefabricated panel (211) is arranged on the outer side of each composite panel (21), the adjacent composite panels (21) are fixedly connected end to end, and the cast-in-situ concrete slab (212) is arranged between each prefabricated panel (211) and each reinforcement inclusion (5).

3. The composite panel multi-stage reinforced retaining wall of claim 2, wherein: the top of prefabricated panel (211) is provided with first buried bar (2111), the bottom of prefabricated panel (211) be provided with first buried bar (2111) complex bolt hole, adjacent prefabricated panel (211) pass through first buried bar (2111) with bolt hole fixed connection, prefabricated panel (211) with cast-in-place concrete slab (212) fixed connection.

4. A composite panel multi-stage reinforced retaining wall according to claim 3, wherein: the first embedded bars (2111) are 8 HRB400 bars with the diameter of 20 mm.

5. A composite panel multi-stage reinforced retaining wall according to claim 3, wherein: the prefabricated panel (211) comprises second embedded bars (2112), the second embedded bars (2112) are arranged on one side, close to the cast-in-situ concrete slab (212), of the prefabricated panel (211), the connecting component (6) comprises anchoring connecting bars (61) and reinforcing steel bar meshes (62), the reinforcing steel bar meshes (62) are arranged inside the cast-in-situ concrete slab (212), the anchoring connecting bars (61) are arranged between adjacent reinforcing steel bar inclusion bodies (5), the second embedded bars (2112) are fixedly connected with the reinforcing steel bar meshes (62), and the anchoring connecting bars (61) are fixedly connected with the reinforcing steel bar meshes (62).

6. The composite panel multi-stage reinforced retaining wall of claim 5, wherein: the second embedded bars (2112) are 7 rectangular bar rings with the diameter of 16mm, and the exposed parts of all the rectangular bar rings exceed the inner side surface of the prefabricated panel (211) by 10cm.

7. The composite panel multi-stage reinforced retaining wall of claim 2, wherein: the gradient of the grading platform (22) is 4%.

8. The composite panel multi-stage reinforced retaining wall of claim 1, wherein: the multi-stage reinforced retaining wall of the composite panel further comprises at least two reinforced bars (4), wherein the reinforced bars (4) are paved inside the foundation engineering (1), the reinforced bars (4) are adjacent to each other and are arranged in parallel, and the reinforced bars (4) are unidirectional stretching geogrids.

9. The composite panel multi-stage reinforced retaining wall of claim 1, wherein: the reinforced inclusion (5) is sand gravel filled by a permeable geotechnical bag.

10. The composite panel multi-stage reinforced retaining wall of claim 1, wherein: the wall top structure (8) comprises a cap stone (81) and a sealing layer (82), wherein the sealing layer (82) is arranged at the top of the foundation engineering (1), and the sealing layer (82) is fixedly connected with the panel (2) through the cap stone (81).