CN210737589U

CN210737589U - Gravity type retaining wall and wall unit thereof

Info

Publication number: CN210737589U
Application number: CN201921224196.7U
Authority: CN
Inventors: 姚洪锡; 杨辉建; 李小和; 郭建湖; 陈远洪; 李巍; 周孝鑫; 翟顺; 张占荣; 李水平; 林志果
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-06-12
Anticipated expiration: 2029-07-31

Abstract

The utility model provides a wall unit of gravity type barricade, include: the wall body is provided with a cavity capable of being filled with planting soil, and one end of the wall body is provided with a first opening communicated with the cavity; the base is connected with one end, far away from the first opening, of the wall body; the first limiting part is arranged on the side wall of one side of the wall body and the side wall of the base at the same side; the second limiting part is arranged on the side wall of the other side of the wall body and the side wall of the base on the same side; the first limiting part of one wall unit can be matched and connected with the second limiting part of the other wall unit. The utility model also provides a gravity type barricade. Adopt the utility model discloses, can satisfy ecological greening's requirement when guaranteeing that gravity type barricade possesses good structural stability.

Description

Gravity type retaining wall and wall unit thereof

Technical Field

The utility model relates to a geotechnical engineering field especially indicates a wall unit and gravity type barricade of gravity type barricade.

Background

The gravity retaining wall is a supporting and retaining structure form widely applied to side slope engineering of railways, highway embankments, cutting, tunnel portals, bridges, water conservancy, house buildings and the like, mainly depends on the self-gravity of a wall body to resist the lateral pressure of a soil body on the back of the wall to maintain the stability of the retaining wall under the soil pressure, and is a commonly used retaining wall in China at present. Gravity retaining walls are generally formed by grouted sheet stone concrete or concrete cast in one piece.

In order to meet the requirements of overturn resistance and skid resistance, the cross-sectional area of the existing gravity retaining wall is mostly designed to be larger, and the area which can be used for greening on the gravity retaining wall is smaller, so that the greening effect is poor. In order to improve the greening effect, some gravity type retaining walls are formed by splicing a plurality of sectional type prefabricated hollow building blocks instead, greening plants are planted in the hollow structures of the building blocks to realize the functions of supporting and greening, however, the gravity type retaining walls are formed by piling the hollow building blocks, the longitudinal and transverse integrity of the wall body is poor, the terrain adaptability is poor, and under the action of long-term rainwater, planting soil in the building blocks is easy to run off, so that the long-term stability of the gravity type retaining walls is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

In view of this, the main object of the present invention is to provide a gravity type retaining wall and a wall unit thereof, so as to solve the problem that the gravity type retaining wall in the prior art cannot satisfy the ecological greening requirement while ensuring good structural stability.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model discloses the first aspect provides a wall unit of gravity type barricade, include:

the wall body is provided with a cavity capable of being filled with planting soil, and one end of the wall body is provided with a first opening communicated with the cavity;

the base is connected with one end, far away from the first opening, of the wall body;

the first limiting part is arranged on the side wall of one side of the wall body and the side wall of the base at the same side;

the second limiting part is arranged on the side wall of the other side of the wall body and the side wall of the base on the same side; the first limiting part of one wall unit can be matched and connected with the second limiting part of the other wall unit.

Furthermore, one of the first limiting part and the second limiting part is a tenon, and the other is a mortise.

Further, the wall body includes:

the first opening is arranged at one end of the tank body; the first limiting part and the second limiting part are respectively arranged on two side walls of the groove body which are oppositely arranged; the groove body is also provided with a second opening, and the second opening is positioned on one side of the wall surface of the wall body;

the greening groove component is provided with a greening groove for planting plants; the greening groove component is arranged at the second opening; the greening groove component and the groove body are encircled to form the cavity.

Further, the number of the greening groove assemblies is multiple; the plurality of greening groove assemblies are arranged at the second opening in a mutually stacked mode.

Further, the green trough assembly comprises a back plate and a green trough mounting member; the tank body comprises abutting parts formed on two sides of the second opening;

the back plate is arranged in the cavity and is abutted against the abutting part;

the greening groove mounting piece is connected with the back plate and is positioned at the second opening; the back plate and the greening groove mounting piece surround to form the greening groove.

Furthermore, a water outlet is arranged on the back plate; the water outlet is communicated with the greening groove and the cavity.

Further, the wall body is a reinforced concrete prefabricated part.

The utility model discloses the second aspect provides a gravity type barricade, include: backfill materials and at least two wall units;

the first limiting part of one wall unit is matched and connected with the second limiting part of the other wall unit, and a step structure is formed at the joint of two adjacent bases;

the backfill material at least comprises planting soil; the backfill materials are respectively filled in the cavity of each wall body, and the planting soil is close to the first opening.

Further, the backfill material also comprises plain concrete and sand gravel;

the plain concrete is filled on one side of the cavity far away from the first opening;

the sand gravel is filled between the planting soil and the plain concrete.

Further, the gravity retaining wall also comprises a drain pipe; the drain pipe is arranged at the junction of the plain concrete and the sand gravel and penetrates through the wall surface and the wall back of the wall body unit.

Further, an expansion joint is formed between every two adjacent wall units; the gravity type retaining wall also comprises an expansion joint filling material; the expansion joint filling material is filled in the expansion joint.

Further, the gravity retaining wall also comprises a first inverted filter layer; the first inverted filter layer is connected with the wall back of the wall body.

Furthermore, the gravity retaining wall also comprises a wall top platform closed layer and an impermeable layer;

the wall top platform sealing layer is connected with the wall back of the wall body and is close to the wall top of the wall body;

a gap is reserved between one end, close to the wall top of the wall body, of the first inverted filter layer and the closed layer of the platform on the wall top; the impermeable layer is connected with the back of the wall body and is positioned at the interval.

Further, the gravity retaining wall also comprises a second inverted filter layer; the second inverted filter layer is arranged in the cavity and is connected with the inner side wall of one side of the wall surface of the cavity close to the wall body.

The utility model provides a wall unit and gravity type barricade of gravity type barricade, be provided with the spacing portion of first spacing portion and second on the both sides wall of wall unit respectively, the wall of wall unit has the cavity that can fill planting soil, when two at least wall unit combinations form gravity type barricade, the base of two adjacent wall units forms the stair structure in the junction, adjacent wall unit is connected through the spacing portion of first spacing portion and second, fill the backfill material that includes planting soil in the cavity of wall simultaneously, from this can be when guaranteeing that gravity type barricade possesses good structural stability, satisfy ecological greening's requirement.

Drawings

Fig. 1 is a half sectional view of a wall unit of a gravity retaining wall according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a perspective view of the green trough assembly shown in FIG. 1;

fig. 4 is a half sectional view of a wall unit of a gravity retaining wall according to another embodiment of the present invention;

fig. 5 is a schematic structural view of a gravity retaining wall according to an embodiment of the present invention;

FIG. 6 is a sectional view A-A of FIG. 5, showing a plant for ease of description;

FIG. 7 is a top view of FIG. 5;

FIG. 8 is a schematic view of the connection of the base shown in FIG. 5;

fig. 9 is a schematic structural view of a gravity retaining wall according to another embodiment of the present invention;

fig. 10 is a flowchart of a construction method of a gravity retaining wall according to an embodiment of the present invention.

Reference numerals: a wall unit 10, 10';

walls

11, 11'; a cavity 11 a;

first openings

11b, 11 b';

wall surfaces

11c, 11 c'; a wall back 11 d; a wall top 11 e; an expansion joint 11 f; a tank body 111; the second opening 111 a; an abutting portion 111 b; a green trough assembly 112; a greening groove 112 a; a back plate 1121; drain opening 1121 a; a greening groove mount 1122; a base 12; a first stopper 13; a second stopper portion 14; a backfill material 20; planting soil 21; sand and gravel 22; plain concrete 23; a drain pipe 30; an expansion joint filling material 40; a polystyrene board 41; asphalt reinforcement 42; a first inverted filter layer 50; a second inverted filter 60; a wall top platform containment layer 70; a barrier layer 80.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in the case of no conflict, the technical features in the embodiments and examples of the present invention may be combined with each other, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present invention, and should not be construed as an improper limitation of the present invention.

In the description of the present invention, the orientation or position relationship is the normal setting state based on the wall unit, such as the orientation or position relationship shown in fig. 1, wherein "vertical" is the up-down direction of fig. 1, and "overlook" is the down direction of fig. 1. It is to be understood that such directional terms are merely for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operative in a particular orientation, and therefore should not be taken as limiting the invention.

In a first aspect of the present invention, referring to fig. 1 and 2, a wall unit 10 includes a wall 11, a base 12, a first limiting portion 13 and a second limiting portion 14. The wall body 11 has a cavity 11a filled with planting soil 21, and one end of the wall body 11 has a first opening 11b communicated with the cavity 11 a. The base 12 is connected to an end of the wall 11 away from the first opening 11 b. The first limiting part 13 is disposed on the sidewall of one side of the wall 11 and the sidewall of the base 12 on the same side, and the second limiting part 14 is disposed on the sidewall of the other side of the wall 11 and the sidewall of the base 12 on the same side. The first position-limiting part 13 of one wall unit 10 can be connected with the second position-limiting part 14 of another wall unit 10 in a matching way.

Specifically, the wall unit 10 of the present embodiment is a part of a gravity type retaining wall, and a plurality of wall units 10 are connected to each other to form the gravity type retaining wall. The wall 11 of the wall unit 10 has a wall surface 11c, a wall back 11d and a wall top 11e, wherein the wall back 11d is a side of the wall 11 close to the soil, the wall surface 11c is a side opposite to the wall back 11d, i.e. an outward side, and the wall top 11e is an end far away from the base 12, i.e. an end where the first opening 11b is located. The base 12 of the present embodiment is inclined downward from the wall surface 11c side of the wall body 11 to the wall back 11d side, and the slope is 1: 0.2-1: 0.3. The end of the wall 11 connected to the base 12 is inclined at the same inclination as the base of the base 12. The wall 11 of this embodiment is the reinforced concrete prefab, and preferably, the height of wall 11 is 3 ~ 4m, can adopt 2m one section in principle to prefabricate, and the concrete height and the wall thickness of wall 11 can be confirmed according to checking calculation result, mainly so that prefabricate, transport, hoist and mount and satisfy the controllable purpose of construction quality. Most of existing gravity retaining walls are constructed in a cast-in-place mode, the site construction causes environmental pollution, the construction period is long, particularly, slope stripping, slipping and collapsing are easily caused in rainy seasons, and even shallow landslide is caused. In addition, the related detection standard and the engineering quality are easier to control, and the finished gravity retaining wall has a better appearance effect. In the embodiment, the wall surface 11c and the wall back 11d of the wall body 11 are both vertically disposed, and in another embodiment, the wall back 11d and/or the wall surface 11c may also be obliquely disposed.

Further, referring to fig. 6, since the gravity retaining wall mainly bears the soil pressure by its own weight, after the cavity 11a of the wall 11 is filled with backfill materials 20 such as planting soil 21, the wall unit 10 can be ensured to have enough own weight, and plants can be planted at the first opening 11b, so that the top 11e of the wall unit 10 can have a greening function.

In addition, referring to fig. 7, in order to ensure that the plurality of wall units 10 can be effectively connected to enhance the overall stability of the gravity retaining wall, a first limiting portion 13 and a second limiting portion 14 matched with the first limiting portion 13 are disposed on the wall 11 and the base 12 of each wall unit 10, and when two adjacent wall units 10 are combined, the first limiting portion 13 disposed on the wall 11 and the base 12 of one wall unit 10 is matched and connected with the second limiting portion 14 disposed on the wall 11 and the base 12 of another wall unit 10. Further, the first spacing portion 13 of this embodiment is the tongue-and-groove, and the spacing portion 14 of second is the tenon, and mortise-tenon structural connection is simple, and stability is better. In another embodiment, the first position-limiting part 13 may be a tenon and the second position-limiting part 14 may be a mortise, or the first position-limiting part 13 and the second position-limiting part 14 may be in other matching manners, such as a plug-in matching manner.

It can be understood that after a plurality of wall units 10 are combined, only one side of two wall units 10 at two ends of the gravity retaining wall needs to be connected to the adjacent wall unit 10, so that the two wall units 10 at two ends of the gravity retaining wall can be provided with the first limiting portion 13 or the second limiting portion 14 only on one side of the wall 11 and the base 12, and the other side is not provided with the first limiting portion 13 or the second limiting portion 14.

Referring to fig. 1 to fig. 3, the wall 11 of the present embodiment includes a trough 111 and a green trough assembly 112. The first opening 11b is disposed at one end of the slot body 111, the first limiting portion 13 and the second limiting portion 14 are disposed on two opposite sidewalls of the slot body 111, the slot body 111 further has a second opening 111a, and the second opening 111a is located on a side where the wall surface 11c of the wall body 11 is located. A greening groove 112a for planting plants is formed on the greening groove component 112, the greening groove component 112 is arranged at the second opening 111a, and the greening groove component 112 and the groove body 111 surround to form a cavity 11 a.

For convenience of description, the wall unit 10 of the present embodiment is called a trough-type wall unit, and the trough-type wall unit of the present embodiment actually has a greening groove 112a disposed on one side of the wall surface 11c, and the greening groove 112a can also be used for planting plants, so that the wall surface 11c can be greened, and the coverage area of the plants on the whole trough-type wall unit can be increased. The plants planted in the first opening 11b and the greening groove 112a according to the present embodiment may be selected from herbs, shrubs, vines, etc. according to local environmental conditions, and are not limited herein.

Referring to fig. 1 to fig. 3, the number of the green trough assemblies 112 of the present embodiment is multiple, and the multiple green trough assemblies 112 are stacked on each other at the second opening 111 a. The green trough assembly 112 of this embodiment is a reinforced concrete prefabricated component, and therefore, the provision of a plurality of green trough assemblies 112 facilitates both prefabrication and transportation, as well as installation.

Further, the greening trough assembly 112 of the present embodiment includes a back plate 1121 and a greening trough mounting member 1122. The slot 111 includes abutting portions 111b formed on both sides of the second opening 111a, and the back plate 1121 is disposed in the cavity 11a and abuts against the abutting portions 111b, so that the stability of the installation of the back plate 1121 can be ensured to prevent the back plate 1121 from falling off from the slot 111. The greening groove mounting member 1122 is connected to the back plate 1121 and is located at the second opening 111a, that is, the greening groove mounting member 1122 is disposed between the abutting portions 111b located at both sides of the second opening 111a, and the back plate 1121 and the greening groove mounting member 1122 surround to form the greening groove 112 a. Furthermore, the back plate 1121 of this embodiment is further provided with a water discharge opening 1121a, the water discharge opening 1121a communicates the greening groove 112a and the cavity 11a, that is, the greening groove 112a and the cavity 11a are communicated with each other, and accumulated water in the cavity 11a can be discharged from the water discharge opening 1121a, so that not only can waterlogging in the cavity 11a be prevented, but also the discharged accumulated water can irrigate plants planted in the greening groove 112a, and further, the survival rate of the plants planted in the first opening 11b and the greening groove 112a can be improved. In another embodiment, only one greening groove assembly 112 may be provided, for example, the back plate 1121 may be enlarged in size to cover the entire second opening 111a, and a plurality of greening groove mounting members 1122 may be provided on the enlarged back plate 1121 to form a plurality of greening grooves 112 a.

Referring to fig. 4, in another embodiment of the present application, there is provided another wall unit 10 ', and a wall 11 ' of the wall unit 10 ' is a box-type structure having a first opening 11b ', and for convenience of description, the wall unit 10 ' having the box-type structure is referred to as a box-type wall unit. The box-type wall unit is different from the groove-type wall unit in that one side of the wall surface 11c 'of the wall body 11' of the box-type wall unit is a closed surface, a greening groove component is not arranged, and other structures of the box-type wall unit are the same as those of the groove-type wall unit, and are not described again.

In a second aspect, the present invention provides a gravity retaining wall, referring to fig. 5 to 8, comprising backfill material 20 and at least two of the wall units 10. The first limiting part 13 of one wall unit 10 is matched and connected with the second limiting part 14 of the other wall unit 10, and the two adjacent bases 12 form a step structure at the joint. The backfill material 20 at least comprises planting soil 21, the backfill material 20 is respectively filled in the cavity 11a of each wall body 11, and the planting soil 21 is close to the first opening 11 b.

Specifically, please refer to fig. 5 and 8, the purpose of forming a step structure at the connection between two adjacent bases 12 is to enable the wall 11 of one wall unit 10 to be connected with the wall 11 and the base 12 of another wall unit 10 at the same time through the first limiting portion 13 and the second limiting portion 14 after the two wall units 10 are connected, so as to improve the overall stability of the gravity retaining wall. Further, in order to form a step structure, please continue to refer to fig. 7, in this embodiment, the height H1 of the side wall of each base 12 provided with the first position-limiting portion 13 is higher than the height H2 of the side wall provided with the second position-limiting portion 14, and meanwhile, the first position-limiting portion 13 is configured as a mortise, that is, a mortise is disposed on the side wall of the side of the base 12 with the higher height, so as to ensure better adhesion between the mortise and the tenon. In addition, to ensure the stability of the gravity retaining wall, the value of H2 should be at least 15 cm.

With continued reference to fig. 6, the backfill material 20 of the present embodiment further includes plain concrete 23 and sand and gravel 22. Plain concrete 23 is filled in the cavity 11a on the side away from the first opening 11b, and sand and gravel 22 is filled between the planting soil 21 and the plain concrete 23. The purpose of setting plain concrete 23 and sand gravel 22 is to reduce the center of gravity of the overall structure of the gravity retaining wall, improve the anti-overturning performance, and save materials and cost. In addition, the plain concrete 23 may also function to prevent the base of the gravity retaining wall from softening. It should be noted that, on the premise that the setting thickness of the planting soil 21 can meet the planting requirement of the plants, the setting thicknesses of the plain concrete 23 and the sand gravel 22 can be adjusted as required, which is not limited herein. In another embodiment, the backfill material 20 can be selected from suitable materials as needed, so long as at least planting soil 21 is ensured in the backfill material 20.

Referring to fig. 6, the gravity retaining wall of the present embodiment further includes a drainage pipe 30. The drain pipe 30 is provided at the interface between the plain concrete 23 and the gravel stones 22, and penetrates the wall surface 11c and the wall back 11d of the wall unit 10. The drainage pipe 30 may be a polyvinyl chloride (PVC) pipe, which is mainly used to drain accumulated water in the soil on the side of the wall back 11d to ensure the stability of the gravity retaining wall. To facilitate the flow of water, the water discharge pipe 30 can be disposed closely to the upper backfill surface of the plain concrete 23, the upper backfill surface of the sand and gravel 22, and the inner side wall of the cavity 11 a.

Referring to fig. 7, an expansion joint 11f is formed between two adjacent wall units 10 of the present embodiment. The gravity retaining wall further comprises an expansion joint filling material 40, and the expansion joint filling material 40 is filled in the expansion joint 11 f.

Specifically, the expansion joint filling material 40 may be a polystyrene board 41 and an asphalt reinforcement 42, the polystyrene board 41 is mainly filled in the middle of the expansion joint 11f, and the asphalt reinforcement 42 is filled in the expansion joint 11f near the two ends thereof.

Referring to fig. 6, the gravity retaining wall of the present embodiment further includes a first filtering layer 50, and the first filtering layer 50 is connected to the wall back 11d of the wall body 11. The first inverted filter layer 50 has the functions of drainage, filtration, seepage prevention, buffering and the like, so that the stability of the gravity retaining wall can be improved, water can be supplemented to the planting soil 21 in the cavity 11a, the development and growth of plant roots are facilitated, and the survival rate of plants is improved. It should be noted that, in some cases, for example, when the soil on the wall back 11d side is hard rock, the first inverted filter layer 50 may not be provided. Further, the gravity retaining wall of this embodiment further includes a second inverse filter layer 60, and the second inverse filter layer 60 is disposed in the cavity 11a and connected to the inner sidewall of the cavity 11a on the side close to the wall surface 11c of the wall body 11. For the trough-type wall unit, the second inverted filter layer 60 is actually connected to the side of the back plate 1121 facing the cavity 11a, so that the nutrition complementation between the planting soil 21 in the greening trough and the planting soil 21 in the cavity 11a can be realized, and the survival rate of the plants can be improved.

With continued reference to fig. 6, the gravity retaining wall of this embodiment further includes a top platform sealing layer 70 and an impermeable layer 80. The ceiling deck enclosed layer 70 is connected to the back wall 11d of the wall body 11 and is adjacent to the ceiling 11e of the wall body 11. The first reverse filter layer 50 has a gap between one end of the first reverse filter layer close to the wall top 11e of the wall body 11 and the wall top platform sealing layer 70, and the impermeable layer 80 is connected with the wall back 11d of the wall body 11 and is located at the gap. The impermeable layer 80 can reduce the rainwater on the earth surface from permeating into the soil body, so as to prevent the potential safety hazard caused by excessive water accumulation in the soil body.

Referring to fig. 9, another embodiment of the present invention provides another gravity retaining wall, which is formed by combining a wall unit 10 and a wall unit 10', that is, the gravity retaining wall is formed by combining a trough-type wall unit and a box-type wall unit. When a combined structure of the trough-type wall unit and the box-type wall unit is adopted, it is preferable that the trough-type wall unit is arranged at a section where a higher wall body needs to be arranged, the box-type wall unit is arranged at both ends (the end part is generally a section where the lower wall body is arranged) of the gravity-type retaining wall, and an end wall (not shown) can be arranged at the joint of the trough-type wall unit and the box-type wall unit.

In another embodiment, the gravity retaining wall may be formed by assembling all of the wall units 10' (i.e., box-type wall units).

The third aspect of the present invention also provides a construction method of the gravity retaining wall, which is mainly used for the gravity retaining wall. Referring to fig. 10, the gravity retaining wall is formed by combining a plurality of wall units 10 (i.e., trough wall units), and the construction method mainly includes the following steps:

the method comprises the following steps: the base 12 of each wall unit 10 is cast in place, and a step structure is formed at the joint of two adjacent bases 12;

specifically, the base 12 is of a reinforced concrete structure, before cast-in-place, a field needs to be leveled, necessary foundation treatment is carried out according to foundation conditions, then foundation excavation is carried out, after the foundation treatment, leveling and tamping are completed, a reinforced concrete leveling layer is cast in place, and the base 12 is cast in place according to design requirements.

Step two: each base 12 is provided with a corresponding wall body 11;

specifically, the wall body 11 of the present embodiment is a reinforced concrete prefabricated member, and the wall body 11 is prefabricated in advance in a factory or a centralized site. When the wall body 11 is installed, the wall body 11 is hoisted section by section and installed on site. Because the wall unit 10 is a trough-type wall unit, when the wall 11 is hoisted, the trough body 111 and the green trough assembly 112 need to be hoisted in sections and installed on site. In the installation process, an expansion joint 11f is arranged between the adjacent wall bodies 11, and the expansion joint 11f is filled with a polystyrene board 41.

Step three: filling a backfill material 20 in the cavity 11a of each wall body 11; wherein the planting soil 21 is adjacent to the first opening 11 b.

Specifically, before the backfill material 20 is filled, the foundation pit on the wall surface 11c side of the wall body 11 is backfilled, then the cavity 11a is filled with the plain concrete 23, then the first and second

inverted filters

50 and 60 and the impermeable layer 80 are installed, and the cavity 11a is filled with the sand gravel 22 in a layered manner and compacted. Meanwhile, the wall back 11d side of the wall body 11 is backfilled, and the backfilling material 20 can also be sand gravel 22. Finally, asphalt reinforcement 42 is filled in the position of the expansion joint 11f near the two end parts, the top platform sealing layer 70 of the wall is cast, and the planting soil 21 is filled in the cavity 11a and the greening groove 112 a.

After the steps are completed, corresponding plants can be planted in the planting soil 21, and therefore the greening function of the gravity retaining wall is achieved.

For the gravity type retaining wall formed by combining the groove-shaped wall units and the box-shaped wall units or the gravity type retaining wall formed by combining all the box-shaped wall units, the construction mode is similar to the construction mode, and the description is omitted.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A wall unit for a gravity retaining wall, comprising:

2. The wall unit of claim 1, wherein one of the first and second retaining portions is a tongue and the other is a groove.

3. The wall unit of claim 1 or 2, wherein the wall comprises:

4. A wall unit according to claim 3 wherein the number of the assembly of gutters is plural; the plurality of greening groove assemblies are arranged at the second opening in a mutually stacked mode.

5. The wall unit of claim 4, wherein the green trough assembly comprises a back plate and a green trough mounting member; the tank body comprises abutting parts formed on two sides of the second opening;

6. The wall unit of claim 5, wherein the back plate is provided with a drain opening; the water outlet is communicated with the greening groove and the cavity.

7. The wall unit of claim 1, wherein the wall is a reinforced concrete preform.

8. A gravity retaining wall, comprising: backfill material and at least two wall units according to any one of claims 1-7;

9. A gravity fed retaining wall according to claim 8 wherein said backfill material further comprises plain concrete and sand gravel;

the sand gravel is filled between the planting soil and the plain concrete.

10. A gravity retaining wall according to claim 9 further comprising a drain; the drain pipe is arranged at the junction of the plain concrete and the sand gravel and penetrates through the wall surface and the wall back of the wall body unit.

11. A gravity retaining wall according to any one of claims 8 to 10, wherein an expansion joint is formed between two adjacent wall units; the gravity type retaining wall also comprises an expansion joint filling material; the expansion joint filling material is filled in the expansion joint.

12. A gravity retaining wall according to any one of claims 8 to 10, wherein the gravity retaining wall further comprises a first backwash layer; the first inverted filter layer is connected with the wall back of the wall body.

13. A gravity retaining wall according to claim 12, wherein said gravity retaining wall further comprises a wall top platform containment layer and an impermeable layer;

14. A gravity retaining wall according to claim 12, wherein said wall further comprises a second backwash layer; the second inverted filter layer is arranged in the cavity and is connected with the inner side wall of one side of the wall surface of the cavity close to the wall body.