CN204174636U - In-situ deposited prefabricated combined retaining wall structure - Google Patents

Abstract

The utility model relates to a kind of in-situ deposited prefabricated combined retaining wall structure, it is characterized in that described retaining wall structure comprises cast-in-situ concrete short limb plate T-shaped post and prefabricated breast boards; Cast-in-situ concrete short limb plate T-shaped post is made up of short limb plate and rib post, and short limb plate and prefabricated breast boards are provided with concavo-convex tongue-and-groove and screw hole; Agreed with by concavo-convex tongue-and-groove between short limb plate and prefabricated breast boards, and be fixedly connected with by Screw arbor with nut at both-ends; Prefabricated breast boards is provided with drain hole, inside prefabricated breast boards, drain hole vertical direction is provided with rubble vertical drainage body; Also be provided with cellular concrete lightweight soil layer inside prefabricated breast boards, cellular concrete lightweight soil layer builds stepped in roadbed side; Prefabricated breast boards arranged outside has planting technique Hanging Basket.The retaining wall structure of the utility model reality, structure is simple, and gear soil is effective, and speed of application is fast, has good technical economic benefit.

Description

Cast-in-place prefabricated combined retaining wall structure

technical field

The utility model relates to a cast-in-place prefabricated combined retaining wall structure, which belongs to the field of highway engineering, and is suitable for retaining wall projects when the road engineering cannot be normally sloped according to the design due to the influence of terrain, building red lines, adjacent buildings, etc. .

Background technique

A retaining wall refers to a structure that supports fill or hillside soil and prevents the deformation and instability of the fill or soil. It is used in the retaining structure engineering of roads, railways, water conservancy, construction and other projects. There are many forms and types of retaining walls. According to their stiffness, they can be divided into two types: rigid retaining walls and flexible retaining walls.

Rigid retaining wall refers to the retaining wall formed by some rigid materials such as stone masonry or concrete pouring, such as mortar block stone retaining wall, reinforced concrete retaining wall, anchor retaining wall, etc., this type of retaining wall The deformation itself is small, and the earth pressure behind the wall is relatively large. The construction speed of the rigid retaining wall is slow, and the construction takes a long time. For example, the mortar block stone retaining wall needs to be stacked layer by layer, and cement mortar is required between the blocks. The reinforced concrete retaining wall It is necessary to bind the steel bars on site, install the formwork, and then pour the concrete.

The flexible retaining wall is a retaining structure that can undergo deflection deformation under the action of earth pressure and affect the magnitude and distribution of earth pressure. The ecological retaining wall belongs to the flexible retaining wall. The ecological retaining wall is a kind of retaining wall that can not only play the role of ecological protection, but also have landscape functions and prevent soil erosion. The common ecological retaining wall structure is a wall formed by layered multi-layer ecological bags to support the filling material. Each layer of ecological bags includes multiple ecological bags, and the adjacent ecological bags of the wall are connected by connecting buckles. Connected, and a transverse reinforcement is set in the wall, the structural retaining wall can prevent the displacement, deformation and falling off of the ecological bag retaining wall to a certain extent. However, due to the low rigidity of the wall, when the height of the retaining wall is too large, the amount of earth and stone in the construction will be large, the construction will be difficult, and the soil pressure and deformation behind the wall will be difficult to control.

To sum up, although the existing retaining wall structure can achieve good results under suitable engineering conditions, there are still some areas to be improved. In view of this, according to the actual needs of the current engineering, it is urgent to invent a kind of retaining wall with high overall structural stability, combined with the advantages of rigid retaining wall and flexible retaining wall, and playing an environmental protection role while ensuring the supporting effect structure.

Contents of the invention

The purpose of this utility model is to provide a cast-in-place prefabricated combined retaining wall structure for the problems existing in the actual application of the existing retaining wall structure. The structure has good overall stability, high strength, and ecological greening The effect of cast-in-place prefabricated combined retaining wall structure.

In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical solutions:

A cast-in-place prefabricated combined retaining wall structure is characterized in that the retaining wall structure includes a cast-in-place concrete short wing T-shaped column and a prefabricated earth retaining board; the cast-in-place concrete short wing T-shaped column is composed of a short wing plate Consisting of rib columns, both the short wing board and the prefabricated soil retaining board are provided with concave-convex tenons and screw holes; the short wing board and the prefabricated soil retaining board are fitted with concave-convex tenon and grooves, and are fixedly connected by tension screws; the prefabricated retaining board Drainage holes and screw holes are set on the soil plate; gravel vertical drainage bodies are arranged on the inside of the prefabricated soil retaining board along the vertical direction of the drainage holes; the inner side of the prefabricated soil retaining board is also provided with a lightweight soil layer of air bubble concrete. The soil layer is poured into steps on the side of the roadbed; green planting hanging baskets are set on the outside of the prefabricated retaining board.

The T-shaped column of the cast-in-place concrete short wing plate is formed by pouring concrete.

The prefabricated soil retaining board is prefabricated from concrete.

The cast-in-place prefabricated combined retaining wall structure is characterized in that the rib column of the T-shaped column of the cast-in-place concrete short wing plate is longer than the short wing plate, and the short wing plate is only set above the ground, and the cast-in-place concrete short wing plate The part below the ground of the T-shaped column is only provided with a rib column, and the upper part of the short wing plate is higher than the rib column, and the height difference between the two tops is the thickness of the road surface. The cast-in-place prefabricated combined retaining wall structure is characterized in that the drainage holes set on the prefabricated soil retaining plate are arranged in a plum blossom shape, and a drainage pipe is arranged in the drainage hole, and the end of the drainage pipe near the inner side of the retaining wall is wrapped with a Filter geotextiles.

The gravel drainage channels are arranged vertically along the drainage holes, and the gravel drainage channels are in a structure with a large top and a small bottom.

The greening planting hanging basket is connected with the prefabricated retaining plate through expansion bolts, and the greening planting basket is located at the lower part of the drainage pipe to realize rainwater self-irrigation.

The construction method of the above-mentioned cast-in-place prefabricated combined retaining wall structure comprises the following steps:

Step 1. Renovate the construction site: according to the design drawings, process the construction site, measure and stake out;

Step 2: Construction of cast-in-place concrete short wing T-shaped columns: the cast-in-place concrete short wing T-shaped columns are composed of short wing plates and rib columns, and the short wing plates are provided with screw holes, which are made of reinforced concrete; T-shaped columns of cast-in-place concrete short flanges are drilled on one side or both sides, and the T-shaped columns of cast-in-place concrete short flanges are embedded in the bearing layer;

Step 3. Construction of prefabricated soil retaining board: the prefabricated soil retaining board is prefabricated by reinforced concrete, and screw holes and drainage holes are set on the prefabricated soil retaining board; After the concave-convex mortise on the column is aligned, drive the prefabricated retaining plate downwards and align the screw holes;

Step 4. Arranging the tensioning screws: After the prefabricated retaining plate is embedded in the T-shaped column of the cast-in-place concrete short wing plate, pass the tensioning screws through the screw holes and fix them in combination;

Step 5. Install the drainage pipe: insert the PVC pipe with filter geotextile at one end into the drainage hole of the prefabricated earth retaining board;

Step 6: Green planting basket construction: After the prefabricated soil retaining board is installed, fix the greening planting basket with the prefabricated soil retaining board through expansion bolts, and place the greening planting basket at the bottom of the drainage hole to receive the accumulated water or rainwater discharged ;

Step 7. Construction of gravel vertical drainage body: On the inner side of the prefabricated retaining wall, formwork is supported along the vertical direction of the drainage hole, which is in the shape of a large top and a small bottom, and gravel is placed inside it to form a vertical drainage body of gravel ;

Step 8. Construction of air-concrete lightweight soil: After the construction of the vertical drainage body of crushed stone is completed, the air-foam concrete light-weight soil layer is poured inside the prefabricated retaining board, and it is poured into steps on the side of the roadbed;

Step 9. Construction of drainage ditch: set drainage ditch at the toe of the retaining wall.

The utility model has the following characteristics and beneficial effects:

(1) The T-shaped column of the cast-in-place concrete short wing plate is in the shape of "T", which has a large specific surface area and bending stiffness, which is conducive to exerting side friction resistance and horizontal resistance, and has good vertical and horizontal bearing performance. At the same time, the short wing Concave-convex mortises are arranged on the board, which is convenient to fit with the concave-convex mortise provided on the prefabricated soil retaining plate.

(2) The T-shaped column of the cast-in-place concrete short wing plate and the predetermined position of the prefabricated earth retaining plate are provided with screw holes, which is convenient for the arrangement of the pull screws, so that the T-shaped column of the cast-in-place concrete short wing plate and the prefabricated earth retaining plate are closely combined, Increased integrity of the retaining wall structure.

(3) The drainage holes set on the prefabricated soil retaining board and the setting of the gravel vertical drainage body inside the prefabricated soil retaining board ensure timely discharge of accumulated water in the subgrade; at the same time, green planting baskets are set outside the prefabricated soil retaining The lower part of the hole makes full use of the accumulated water discharged from the roadbed to irrigate the plants, realizing the self-irrigation of accumulated water and rainwater.

(4) The prefabricated retaining slab is set with air-filled concrete light soil, and poured into a step shape on the side of the roadbed, which reduces the horizontal earth pressure of the roadbed, increases the anti-overturning capacity of the retaining wall, and reduces the weight of the roadbed , which is beneficial to reduce subgrade settlement and improve the overall stability of subgrade and retaining wall.

Description of drawings

Fig. 1 is the perspective view of the T-shaped column of the cast-in-place concrete short wing plate of the utility model;

Fig. 2 is the perspective view of the utility model prefabricated retaining board;

Fig. 3 is a plan view of a cast-in-place prefabricated combined retaining wall structure of the present invention;

Fig. 4 is the sectional view along A-A direction of Fig. 3;

Fig. 5 is a sectional view along the B-B direction of Fig. 3;

Fig. 6 is a cross-sectional view along C-C direction of Fig. 4 .

In the figure: 1-T-shaped column of cast-in-place concrete short wing plate, 2-rib column, 3-short wing plate, 4-prefabricated soil retaining plate, 5-screw hole, 6-drainage hole, 7-pull screw, 8 -drainage pipe, 9-gravel vertical drainage body, 10-green planting basket, 11-air bubble concrete light soil, 12-subgrade filler, 13-pavement structure, 14-bearing layer, 15-soft soil layer, 16 -gutter.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and are not limited to the following examples.

Fig. 1 is a perspective view of the T-shaped column of the cast-in-place concrete short wing plate of the present invention, Fig. 2 is a perspective view of the prefabricated earth retaining plate of the present invention, and Fig. 3 is a plan view of a cast-in-place prefabricated combined retaining wall structure of the present invention , Figure 4 is a sectional view along the A-A direction of Figure 3, Figure 5 is a sectional view along the B-B direction of Figure 3, and Figure 6 is a sectional view of Figure 3 along the C-C direction. Referring to Figures 1 to 6, the cast-in-place prefabricated combined retaining wall structure is mainly composed of cast-in-place concrete short wing plate T-shaped columns 1, prefabricated earth retaining boards 4, gravel vertical drainage body 9, and air bubble concrete lightweight soil 11 , pavement structure 13 and other parts.

The cast-in-place concrete short wing slab T-shaped column 1 and the prefabricated earth retaining slab 4 are all made of reinforced concrete structure, which is made of concrete with a strength grade of C30, and steel bars are laid in the concrete according to the design. The rib column 2 of the cast-in-place concrete short wing plate T-shaped column 1 is 2000mm long, 1500mm wide, and 9700mm high; the short wing plate 3 is 600mm long, with a maximum thickness of 800mm and a height of 10000mm. The height of the top of the rib column 2 lower than the top of the short wing plate 3 is the thickness of the pavement structure layer. The prefabricated retaining plate 4 is 3000mm wide and 500mm thick. The embedding depth of the cast-in-place concrete short wing plate T-shaped column 1 into the bearing layer 14 is determined by the stability checking calculation, and the embedding depth of this embodiment is 1000 mm.

The short wing plate 3 and the prefabricated retaining plate 4 are provided with a screw hole 5, and the diameter of the screw hole 5 is 50 mm. The short wing plate 3 and the prefabricated earth retaining plate 4 are fixedly connected by means of a concave-convex tongue and groove, and are fixedly connected by a pull screw 7 .

The drainage holes 6 on the prefabricated soil retaining board are evenly arranged in a quincunx shape on the prefabricated soil retaining board, with a vertical spacing of 1000mm and a horizontal spacing of 2000mm. A drainage pipe 8 is placed inside the drainage hole 6, and the drainage pipe 8 adopts a PVC pipe with a diameter of 60 mm, and an anti-filtering geotextile is wrapped near the inner side of the retaining wall.

The green planting basket 10 is prefabricated by PVC material, and green plants can be planted inside. The greening planting basket 10 is fixed on the outside of the prefabricated retaining plate 4 by expansion bolts, and the greening planting basket 10 is placed slightly lower than the drainage pipe 8 for receiving rainwater or accumulated water discharged from the inside of the retaining wall.

The gravel vertical drainage body 9 is arranged between the air cell concrete light soil 11 and the prefabricated earth retaining board 4, the gravel vertical drainage body 9 is filled with gravel with a diameter of 30mm~40mm, and the gravel vertical drainage Body 9 is funnel-shaped with a large top and a small bottom.

The air-filled concrete lightweight soil 11 is poured into the inner side of the T-shaped column 1 of the cast-in-place concrete short wing plate. The air-filled concrete light soil 11 is stepped, with a step distance of 1500mm and a height difference of 1500mm. The material specification of cellular concrete lightweight soil 11 is that the bulk density is not greater than 6KN/m3, the mix ratio strength should meet the 28-day strength ≥0.8Mpa, and the fluidity is 180mm±20mm. After the cellular concrete lightweight soil 11 reaches a certain strength, the subgrade filler 12 in the central area of the embankment is constructed, and then the pavement structure 13 is constructed.

The drainage ditch 16 is located outside the T-shaped column 1 of the cast-in-place concrete short wing plate and is formed by pouring concrete.

The main construction process of the above-mentioned cast-in-place prefabricated combined retaining wall is as follows:

Step 1. Renovate the construction site: according to the design drawings, process the construction site, measure and stake out;

Step 2: Construction of the cast-in-place concrete short wing T-shaped column 1: the cast-in-place concrete short wing T-shaped column 1 is composed of the short wing 3 and the rib column 2, and the short wing 3 is provided with a screw hole, which is made of reinforced concrete made. Set up cast-in-place concrete short wing T-shaped columns 1 on one or both sides of the subgrade, and cast-in-place concrete short wing T-shaped columns 1 are embedded in the bearing layer for 1000m;

Step 3: Construction of the prefabricated earth retaining board 4: the prefabricated earth retaining board 4 is prefabricated from reinforced concrete, and the prefabricated earth retaining board 4 is provided with screw holes 5 and drainage holes 6. After the concave-convex tenon and groove on the prefabricated soil retaining board 4 are aligned with the concave-convex tenon and groove on the T-shaped column 1 of the cast-in-place concrete short wing plate, the prefabricated soil retaining board 4 is driven downward by machinery, and the screw holes are aligned;

Step 4. Arrangement of the tension screw 7: After the T-shaped column 1 of the cast-in-place concrete short wing plate and the prefabricated earth retaining plate 4 are completed, pass the tension screw 7 through the screw hole 5, and then combine and fix it;

Step 5, install the drainage pipe 8: Put the PVC pipe material with one end wrapped with the anti-filter geotextile into the drainage hole 6 of the prefabricated earth retaining board;

Step 6: Construction of the greening planting basket 10: After the installation of the prefabricated earth retaining board 4 is completed, the greening planting basket 10 is fixed with the prefabricated earth retaining board 4 through expansion bolts, and the greening planting basket 10 is placed in the lower part of the drainage hole 6 for holding and retaining The accumulated water and rainwater discharged from the inner side of the earth wall;

Step 7. Construction of the gravel vertical drainage body 9: on the inner side of the prefabricated retaining plate 4, formwork is supported along the vertical direction of the drainage hole, which is in the shape of a large top and a small bottom, and gravel with a diameter of 30mm~40mm is placed inside it , forming a gravel vertical drainage body 9;

Step 8, construction of air-foam concrete lightweight soil 11: after the construction of the crushed stone vertical drainage body 9 is completed, the air-foam concrete light-weight soil layer 11 is poured on the inner side of the prefabricated retaining board, and poured into a ladder shape on the side of the roadbed;

Step 9: Construction of the drainage ditch 16: setting the drainage ditch 16 outside the T-shaped column 1 of the cast-in-place concrete short wing plate.

Claims (7)

1. A cast-in-place prefabricated combined retaining wall structure is characterized in that said retaining wall structure comprises a cast-in-place concrete short wing plate T-shaped column and a prefabricated earth retaining plate; the cast-in-place concrete short wing plate T-shaped column consists of a short Composed of wing plates and rib columns, both the short wing plate and the prefabricated soil retaining plate are provided with concave-convex tenon grooves and screw holes; the short wing plate and the prefabricated soil retaining plate are fitted by concave-convex tenon and grooves, and are fixedly connected by tension screws; Drainage holes and screw holes are arranged on the prefabricated earth retaining board; gravel vertical drainage bodies are arranged on the inner side of the prefabricated earth retaining board along the vertical direction of the drainage holes; the inner side of the prefabricated earth retaining board is also provided with a lightweight soil layer of air bubble concrete, air bubble concrete The light soil layer is poured into steps on the side of the roadbed; green planting hanging baskets are set on the outside of the prefabricated retaining board. 2. The cast-in-place prefabricated combined retaining wall structure according to claim 1, characterized in that the T-shaped column of the cast-in-place concrete short wing plate is formed by pouring concrete. 3. The cast-in-place prefabricated combined retaining wall structure according to claim 1, characterized in that the prefabricated earth retaining board is prefabricated from concrete. 4. The cast-in-place prefabricated combined retaining wall structure according to claim 1, characterized in that the rib column of the T-shaped column of the cast-in-place concrete short wing plate is longer than the short wing plate, and the short wing plate is only arranged above the ground, The part below the ground of the cast-in-place concrete short wing slab T-shaped column is only provided with rib columns, and the upper part of the short wing slab is higher than the rib column, and the height difference between the two tops is the thickness of the road surface. 5. The cast-in-place prefabricated combined retaining wall structure according to claim 1, characterized in that the drain holes provided on the prefabricated retaining plate are arranged in a plum blossom shape, and drain pipes are arranged in the drain holes, and the drain pipes are close to the retaining wall. One end of the inner side of the earth wall is wrapped with a filter geotextile. 6. The cast-in-place prefabricated combined retaining wall structure according to claim 1, characterized in that the gravel drainage body is arranged vertically along the drainage holes, and the gravel drainage channel is in a structure with a large top and a small bottom. 7. The cast-in-place prefabricated combined retaining wall structure according to claim 1, characterized in that the green planting hanging basket is connected to the prefabricated earth retaining board through expansion bolts, and the green planting basket is located at the lower part of the drainage pipe.