CN110306588B - Panel module unit for reinforced earth retaining wall and reinforced earth retaining wall - Google Patents

Abstract

A panel module unit for reinforced retaining walls comprises a vertical plate, a transverse plate and tenons, wherein the vertical plate, the transverse plate and the tenons are integrally formed, the transverse plate is vertically arranged on one side of the plate surface of the vertical plate, the tenons are directly connected with the bottom edge of the vertical plate, and the tenons are convexly arranged on the downward plate surface extension surface of the vertical plate; the vertical plate is also provided with a drain hole, and the transverse plate is provided with a reserved hole for inserting the tenons. The application also discloses a reinforced earth retaining wall which comprises a plurality of panel module units arranged in a staggered manner up and down, exposed reinforcing steel bars at one side of the vertical plate and geotechnical reinforced materials fixedly connected with the exposed reinforcing steel bars. The whole reinforced earth retaining wall is in a stepped shape with a back-off table, so that the earth pressure behind the wall can be effectively reduced, and the stability of the wall is improved; greening planting is carried out in the grooves formed by assembling the upper layer panel units and the lower layer panel units, so that the effect of beautifying the environment and improving the ecology is achieved; the application adopts the panel module unit, can be prefabricated in advance, and has the advantages of convenient construction, short construction period, obvious economic benefit and the like.

Description

Panel module unit for reinforced soil retaining wall and reinforced soil retaining wall

Technical field

The invention belongs to the technical field of geotechnical engineering, and specifically relates to a panel module unit for a reinforced soil retaining wall and a reinforced soil retaining wall.

Background technique

In recent years, my country's infrastructure construction has been advancing rapidly. In the fields of highway, railway, municipal engineering and other engineering fields, reinforced soil retaining walls are widely used to support fill slope projects. Reinforced earth retaining wall, as a flexible earth retaining structure, has the advantages of simple construction, short construction period, space saving, beautiful appearance and low cost.

There are many different types of existing reinforced soil retaining walls in terms of panel form and reinforcement materials. However, they generally have the following shortcomings: (1) The face wall of the reinforced soil retaining wall is often perpendicular to the ground. It is sensitive to deformation and can easily form uneven and uneven walls, which affects its use effect. (2) The earth pressure behind the vertical panel of the reinforced soil retaining wall is relatively large, which will affect the stability of the reinforced soil retaining wall to a certain extent, especially under the action of traffic dynamic load and earthquake load, which is more likely to cause the retaining wall to become unstable. (3) Existing reinforced soil retaining wall panels are often inconvenient for greening and planting, and it is difficult to green slopes. (4) The construction of reinforced soil retaining walls cast on site will increase the difficulty of the project to a certain extent and extend the construction period.

Patent document CN201811090360 discloses a multi-level green assembled cantilever-type reinforced soil retaining wall, in which cantilever-type reinforced soil retaining walls are arranged in steps on the filled soil mass. The cantilever-type reinforced soil retaining walls at each level are composed of steel bars. Concrete cantilevered retaining wall segments are spliced transversely. Between the top of the next-level cantilever-reinforced soil retaining wall and the bottom of the previous group of cantilever-reinforced soil retaining walls, the uppermost level of cantilever-reinforced soil retaining wall is formed. Steps are formed between the top of the retaining wall and the slope of the fill soil, and green plants are planted within the steps to form a green belt; two adjacent reinforced concrete cantilever retaining wall segments of the same level cantilever reinforced soil retaining wall are connected by plugging The structure forms a connection; geogrid-type tie bars are arranged in layers within the fill soil, and the outer ends of each geogrid-type tie bar are fixedly connected to the corresponding vertical arms of the cantilever-type reinforced soil retaining wall. However, the connection between the upper and lower levels is not tight enough, so a wide horizontal distance needs to be maintained between the upper and lower levels to ensure the stability of the retaining wall.

Therefore, a new panel module unit for reinforced soil retaining walls and reinforced soil retaining walls are needed.

Contents of the invention

The object of the present invention is to provide a panel module unit and a reinforced soil retaining wall for a reinforced soil retaining wall, so as to solve the problem that the existing reinforced soil retaining wall's facing wall is perpendicular to the ground and affects its stability as proposed in the background technology. problems such as safety and inconvenience for greening. On-site pouring of reinforced soil retaining wall panels will increase the difficulty of the project and extend the construction period.

In order to achieve the above object, the present invention provides a panel module unit for a reinforced soil retaining wall. The panel module unit includes vertical plates, horizontal plates and tenons of an integrally formed reinforced concrete structure. The horizontal plates are vertical It is arranged on one side of the board surface of the vertical board. The tenon is directly connected to the bottom edge of the vertical board and its protrusion is provided on the downward extension surface of the vertical board. The vertical board is also provided with a drainage hole. The horizontal plate is provided with reserved holes for the downward insertion of the tenons of the upper adjacent panel module units.

Furthermore, the vertical plate is also provided with exposed steel bars, the exposed steel bars form a plane parallel to the horizontal plate, and the exposed steel bars are located below the horizontal plate.

Further, the exposed steel bars and the surface of the vertical plate together form a rectangular space.

Further, the distance between the top of the plane where the exposed steel bars are located and the bottom surface of the horizontal plate is 1/5 to 4/5 of the height of the vertical plate.

Further, each panel module unit is symmetrically provided with two tenons, and correspondingly two reserved holes are provided on the horizontal plate.

Further, in the thickness direction of the vertical plate, the width of the horizontal plate is D, and the horizontal distance d between the center position of the reserved hole and the surface of the vertical plate is 1/ of the width D of the horizontal plate. 4～3/4.

Further, the connection between the horizontal plate and the vertical plate is located in the upper half of the vertical plate, and the drainage hole is located in the lower half of the vertical plate.

The invention also provides a reinforced earth retaining wall, which includes a plurality of panel module units arranged in an up and down position, and the panel module unit includes vertical plates, horizontal plates and an integrally formed reinforced concrete structure. Tenon, the horizontal plate is vertically arranged on one side of the vertical plate, the tenon is directly connected to the bottom edge of the vertical plate and its protrusion is arranged on the downward extension surface of the vertical plate; the horizontal plate The board is provided with reserved holes for the tenons of the upper adjacent panel module units to be inserted downwards. The vertical boards are also provided with exposed steel bars. The exposed steel bars form a plane parallel to the horizontal boards, and The exposed steel bars are located below the horizontal plate; the reinforced soil retaining wall also includes georeinforcement materials fixedly connected to the exposed steel bars. The offset setting of the panel module unit is achieved by inserting more than two tenons of the upper panel module unit respectively. In the reserved holes of the two adjacent panel module units below.

Further, the reinforced soil retaining wall is provided with a panel foundation under the panel module unit at the bottom layer; the two vertical plates of the adjacent panel module units on the upper and lower floors and the horizontal plates of the panel module unit on the lower layer form a space for greening Planted grooves.

Further, the vertical plate of the panel module unit is also provided with a through-hole-shaped drainage hole passing through the panel surface; the distance between the top surface of the plane formed by the exposed steel bars and the bottom surface of the horizontal plate is 1/5 to 4/5 of the height; in the thickness direction of the vertical plate, the width of the horizontal plate is D, and the horizontal distance d between the center of the reserved hole and the surface of the vertical plate is 1/4 to 3/4 of the width D of the horizontal board; the connection between the horizontal board and the vertical board is located in the upper half of the vertical board.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention improves the panel shape of the reinforced soil retaining wall panel module unit and adopts a "├" shaped panel module unit. The upper and lower panel module units are dislocated and assembled by locking the tenons at the lower end of the vertical plate of the upper panel module unit with the reserved holes on the horizontal plate of the lower panel module unit, forming a setback concave between the upper and lower panel module units. groove, and makes the entire reinforced soil retaining wall face into a stepped stepped shape, changing the situation where the traditional reinforced soil retaining wall panels are in a vertical state. Compared with the existing reinforced soil retaining wall, the stepped stepped reinforced soil retaining wall provided by the present invention can effectively reduce the earth pressure behind the facing wall and improve the stability of the reinforced soil retaining wall; at the same time, the upper and lower panel modules The grooves formed by the misaligned assembly of units are filled with soil for greening and planting, which can beautify the surrounding environment and improve the slope ecology. The green landscape improves driver comfort and reduces the probability of traffic accidents; in addition, the reinforced soil barrier The wall adopts modular assembly panels, which can be prefabricated in the factory in advance. It has the advantages of convenient construction, short construction period, and obvious economic benefits.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the drawings.

Description of the drawings

The drawings forming a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a schematic structural diagram of a reinforced soil retaining wall according to an embodiment of the present invention;

Figure 2 is a schematic cross-sectional structural diagram of a reinforced soil retaining wall according to an embodiment of the present invention;

Figure 3 is a schematic structural diagram of the outside of a panel module unit for reinforced soil retaining walls according to an embodiment of the present invention;

Figure 4 is a schematic structural diagram of the inside of a panel module unit for reinforced soil retaining walls according to an embodiment of the present invention;

Figure 5 is a schematic diagram of the outer structure of the upper and lower panel module units after they are dislocated and assembled according to an embodiment of the present invention;

Figure 6 is a schematic diagram of the inner structure of the upper and lower panel module units after they are dislocated and assembled according to an embodiment of the present invention;

Among them, 1. Panel module unit; 2. Geotechnical reinforcement material; 3. Panel foundation; 4. Groove; 5. Filling; 11. Vertical plate; 12. Horizontal plate; 13. Tenons; 14. Reserved holes. ; 15. Exposed steel bars; 16. Drainage holes.

Detailed ways

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

The present invention provides a panel module unit for reinforced soil retaining walls. The panel module unit 1 includes vertical plates 11, transverse plates 12 and tenons 13 of an integrated reinforced concrete structure. The horizontal plates 12 are vertical It is arranged on one side of the board surface of the vertical plate 11. The tenon 13 is directly connected to the bottom edge of the vertical plate 11 and its protrusion is provided on the downward extension surface of the vertical plate 11;

The vertical plate 11 is also provided with a drainage hole 16 . Drainage holes 16 with a certain diameter are provided to facilitate slope drainage and reduce the impact of water accumulation on the stability of the reinforced soil retaining wall. It is preferred that the drainage holes 16 are located in the lower half of the vertical plate 11 .

The horizontal plate 12 is provided with a reserved hole 14 for the tenon 13 of the upper adjacent panel module unit 1 to be inserted downward.

The vertical plate 11 is also provided with exposed steel bars 15 , the exposed steel bars 15 form a plane parallel to the horizontal plate 12 , and the exposed steel bars 15 are located below the horizontal plate 12 . The exposed steel bars 15 and the surface of the vertical plate 11 together form a rectangular space. On the one hand, the exposed steel bar 15 can be used as a connector between the georeinforcement material 2 and the panel module unit 1; on the other hand, it can be used as a hoisting connector on the panel module unit 1 during the construction of the reinforced soil retaining wall.

The distance between the top of the plane where the exposed steel bars 15 are located and the bottom surface of the horizontal plate 12 is 1/2 of the height of the vertical plate 11 .

Each panel module unit 1 is provided with two convex tenons 13 symmetrically, and correspondingly two reserved holes 14 are provided on the transverse plate 12 .

In the thickness direction of the vertical plate 11 , the width of the horizontal plate 12 is D, and the horizontal distance d between the center position of the reserved hole 14 and the surface of the vertical plate 11 is the width D of the horizontal plate 12 1/2.

The connection point between the horizontal plate 12 and the vertical plate 11 is located at the upper half of the vertical plate 11 .

The invention also provides a reinforced soil retaining wall, which includes a plurality of panel module units 1 arranged in an up and down position. The panel module unit 1 includes an integrally formed vertical plate 11 of reinforced concrete structure. The horizontal plate 12 and the tenon 13 are arranged vertically on one side of the vertical plate 11. The tenon 13 is directly connected to the bottom edge of the vertical plate 11 and protrudes downward from the vertical plate 11. On the extension surface of the board; the horizontal plate 12 is provided with a reserved hole 14 for the tenon 13 of the upper adjacent panel module unit 1 to be inserted downward, and the vertical plate 11 is also provided with an exposed steel bar 15, so The exposed steel bars 15 form a plane parallel to the horizontal plate 12, and the exposed steel bars 15 are located below the horizontal plate 12; the reinforced soil retaining wall also includes a georeinforcement material 2 fixedly connected to the exposed steel bars 15, so The staggered arrangement of the panel module units 1 is achieved by inserting the two tenons 13 of the upper panel module unit 1 into the reserved holes 14 of the two adjacent panel module units 1 below.

The specific misaligned connection structure is: one of the two tenons 13 of the upper panel module unit A is inserted into the reserved hole 14 of the lower panel module unit B, and the panel module unit A has another The tenon 13 is inserted into the reserved hole 14 of the lower panel module unit C. The panel module unit B and the panel module unit C are two adjacent panel module units 1 on the left and right.

By dislocating the upper and lower panel module units 1, the left and right adjacent panel module units 1 can be interlocked together to avoid forming vertical cracks that penetrate from top to bottom, greatly improving the integrity of the wall.

After the panel module units 1 are dislocated and assembled, a groove for greening and planting is formed between the two vertical plates 11 of the upper and lower adjacent panel module units 1 and the horizontal plates 12 of the lower panel module unit. The entire reinforced soil retaining wall will be in the shape of a ladder. From a mechanical point of view, the setback treatment of the reinforced soil retaining wall is similar to the back of a tilted wall at a certain inclination, which can reduce the impact on the wall to a certain extent. Horizontal earth pressure at the back of the wall.

Filling the groove 4 with soil can plant vegetation and green the reinforced soil retaining wall, which has the function of beautifying the surrounding environment and improving the ecology of the slope.

The reinforced soil retaining wall is provided with a panel foundation 3 below the bottom panel module unit to ensure the stability of the entire reinforced soil retaining wall panel.

The vertical plate 11 of the panel module unit 1 is also provided with a through-hole-shaped drainage hole 16 passing through the plate surface; the distance between the top surface of the plane formed by the exposed steel bars 15 and the bottom surface of the horizontal plate 12 is 1/2 of the height of the vertical plate 11; in the thickness direction of the vertical plate 11, the width of the horizontal plate 12 is D, and the center position of the reserved hole 14 is at the level between the surfaces of the vertical plate 11 The distance d is 1/2 of the width D of the horizontal plate 12; the connection point between the horizontal plate 12 and the vertical plate 11 is located at the upper half of the vertical plate 11.

Georeinforcement materials refer to geosynthetic materials used in geotechnical engineering to increase rock and soil stability or improve load-bearing capacity. Commonly used georeinforcement materials include geogrids, woven geotextiles and reinforced tapes. The georeinforcement material 2 in this embodiment is a geogrid. One end of the geogrid is connected to the panel module unit 1 through the exposed steel bar 15. The reinforced part of the geogrid is embedded in the retaining wall panel. in the later fill.

The reinforced soil retaining wall includes the following specific construction steps:

Step 1. Clean and level the site, and construct the panel foundation.

Step 2: Prepare prefabricated panel module unit 1 of reinforced concrete structure. The panel module unit 1 includes vertical plates 11, transverse plates 12 and tenons 13 of an integrally formed reinforced concrete structure. The horizontal plates 12 are vertically arranged on the vertical On one side of the board 11, the tenon 13 is directly connected to the bottom edge of the vertical board 11 and its protrusion is provided on the downward extension surface of the vertical board 11; the horizontal board 12 is provided with a The reserved holes 14 are inserted downward into the tenons 13 of the adjacent panel module units 1. The vertical plates 11 are also provided with exposed steel bars 15. The exposed steel bars 15 form a plane parallel to the horizontal plate 12. And the exposed steel bars 15 are located below the horizontal plate 12;

Step 3. Use a crane to hoist and splice the panel module unit 1. The hoisting and splicing of the panel module unit 1 is carried out in layers; after the first layer of panel module unit 1 is installed, fill and compact the fill 5 behind the first layer of wall. When the filling surface is flush with the exposed steel bars 15 behind the first layer panel module unit 1, lay the first layer of georeinforcement material 2 and fix the first layer of georeinforcement material 2 on the exposed steel bars 15 to achieve The connection between the georeinforcement material 2 and the panel module unit 1;

Step 4. Carry out hoisting and splicing of the second layer panel module unit 1; when installing the second layer panel module unit 1, displace the tenons 13 at the lower end of the second layer panel module unit 1 and embed them into the two adjacent ones on the left and right of the first layer. In the reserved hole 14 on the horizontal plate 12 of the panel module unit 1; that is, at least one of the tenons 13 of the panel module unit 1 of the second layer is embedded in the left side of the two adjacent panel module units 1 of the first layer. into the reserved hole 14 of the panel module unit 1, and at least one other of the tenons 13 of the panel module unit 1 on the second layer is embedded in the right panel module of the two adjacent panel module units 1 on the first layer. In the reserved hole 14 of unit 1;

Step 5: Fill and compact the fill 5 behind the second layer of wall. When the fill surface is flush with the exposed steel bars 15 behind the second layer panel module unit 1, lay the second layer of georeinforcement material 2 and place the The second layer of georeinforcement material 2 is fixed on the exposed steel bars 15 on the second layer panel module unit 1;

Step 6. Repeat steps 4 and 5 until the construction reaches the design elevation of the reinforced soil retaining wall.

It should be noted that when splicing the panel module units 1, the tenons 13 and reserved holes 14 of the upper and lower panel module units 1 must be installed in an offset position and tightly joined to ensure the integrity and stability of the reinforced earth retaining wall.

Due to the use of staggered spliced panel module units 1, the panel module units 1 on the left and right sides of the integrally reinforced soil retaining wall are staggered up and down. When the vertical edges of the integrally reinforced soil retaining wall need to be straight, partial and half panels are used. Module unit 1 is supplemented.

The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be concluded that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, a number of simple deductions and substitutions can be made without departing from the concept of the present invention, all of which should be regarded as belonging to the protection scope of the present invention.

Claims (8)

1. A panel module unit for reinforced retaining walls, characterized in that the panel module unit (1) comprises a riser (11), a transverse plate (12) and a tenon (13) which are integrally formed and of reinforced concrete structure, the transverse plate (12) is vertically arranged on one side of the surface of the riser (11), and the tenon (13) is directly connected with the bottom edge of the riser (11) and is convexly arranged on the downward surface extension surface of the riser (11); the vertical plate (11) is also provided with a drain hole (16), and the transverse plate (12) is provided with a reserved hole (14) for downwards inserting the tenons (13) of the upper adjacent panel module units (1);

the vertical plate (11) is also provided with an exposed steel bar (15), the exposed steel bar (15) forms a plane parallel to the transverse plate (12) and the exposed steel bar (15) is positioned below the transverse plate (12);

two tenons (13) are symmetrically arranged on each panel module unit (1), and two reserved holes (14) are correspondingly arranged on the transverse plates (12).

2. The panel module according to claim 1, wherein the exposed rebars (15) together with the faces of the risers (11) enclose a rectangular space.

3. The panel module according to claim 1, characterized in that the distance between the top of the plane where the exposed reinforcement bars (15) are located and the bottom surface of the cross plate (12) is 1/5-4/5 of the height of the riser (11).

4. The panel module according to claim 1, wherein the width of the cross plate (12) in the thickness direction of the riser (11) is D, and the horizontal distance D between the center position of the pre-hole (14) and the plate surface of the riser (11) is 1/4 to 3/4 of the width D of the cross plate (12).

5. The panel module according to claim 1, wherein the connection of the cross plate (12) to the riser (11) is located in the upper half of the riser (11) and the drain hole (16) is located in the lower half of the riser (11).

6. The reinforced earth retaining wall is characterized by comprising a plurality of panel module units (1) which are arranged in a staggered mode up and down, wherein each panel module unit (1) comprises a vertical plate (11), a transverse plate (12) and a tenon (13) which are integrally formed and are of reinforced concrete structures, the transverse plate (12) is vertically arranged on one side of the plate surface of the vertical plate (11), and the tenon (13) is directly connected with the bottom edge of the vertical plate (11) and is arranged on the downward plate surface extension surface of the vertical plate (11) in a protruding mode; the transverse plate (12) is provided with a reserved hole (14) for downward insertion of a tenon (13) of an upper adjacent panel module unit (1), the vertical plate (11) is also provided with an exposed reinforcing steel bar (15), the exposed reinforcing steel bar (15) forms a plane parallel to the transverse plate (12) and the exposed reinforcing steel bar (15) is positioned below the transverse plate (12); the reinforced retaining wall further comprises geotechnical reinforced materials (2) fixedly connected with the exposed reinforcing steel bars (15), and the staggered arrangement of the panel module units (1) is that more than two tenons (13) of the upper panel module units (1) are respectively inserted into reserved holes (14) of two adjacent panel module units (1) below; the reinforced earth retaining wall is provided with a panel foundation (3) below the bottommost panel module unit (1); a through hole-shaped drain hole (16) penetrating through the plate surface is further formed in the vertical plate (11) of the panel module unit (1).

7. The reinforced retaining wall according to claim 6, wherein a groove (4) for greening planting is formed between two risers (11) of the upper and lower adjacent panel module units (1) and a transverse plate (12) of the lower panel module unit (1).

8. The reinforced retaining wall according to claim 6, characterized in that the distance between the top of the plane formed by the exposed reinforcement bars (15) and the bottom surface of the transverse plate (12) is 1/5-4/5 of the height of the vertical plate (11); in the thickness direction of the vertical plate (11), the width of the transverse plate (12) is D, and the horizontal distance D between the center position of the reserved hole (14) and the plate surface of the vertical plate (11) is 1/4-3/4 of the width D of the transverse plate (12); the connection part of the transverse plate (12) and the vertical plate (11) is positioned at the upper half part of the vertical plate (11).