Building block panel reinforced soil retaining wall

Abstract

The utility model discloses a block panel reinforced soil retaining wall. An existing gravity retaining wall is mostly formed by building concrete prefabricated building blocks, soil pressure is borne only by means of vertical gravity, the strength of the whole wall is low, and the structural stability is not high. Building blocks are arranged on the foundation, and cap stones are arranged at the tops of the building blocks. The building block comprises a building block body, and anchor bars are vertically arranged in the building block body, the foundation and the cap stone. Tenons are arranged at the bottom of the building block body, and grooves are formed in the top; the inverted filter layer and the wrapping body are sequentially arranged behind the building block; a geogrid is arranged on the back of the building block, and the geogrid comprises a stress grid and a structural grid; the stress grating is connected with the wrapping body, and the construction grating is connected with the building blocks. The integral stability of the retaining wall is improved, and the stress performance of the wall body is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of roadbed retaining walls, and in particular relates to a block panel reinforced earth retaining wall. Background Art

[0002] With the continuous development of the economy, high fill roadbeds are increasingly widely used. In order to ensure the safety of high roadbed slopes, retaining walls are usually used to maintain the stability of the slope soil. When pile-sheet walls are used, construction is difficult and the construction period is relatively long; when gravity walls are used, the construction cost is high and the drainage performance is poor; when cast-in-place panel reinforced soil retaining walls are used, if the wall is high, the cast-in-place panel is difficult to vibrate as a whole, which affects the construction quality. Existing gravity retaining walls are mostly formed by prefabricated concrete blocks, which only rely on vertical gravity to withstand soil pressure. The strength of the entire wall is low and the structural stability is not high. Utility Model Content

[0003] In order to make up for the deficiencies of the prior art, the utility model provides a block panel reinforced earth retaining wall, which improves the overall stability of the retaining wall through geogrids and vertical anchor bars, and has good force-bearing performance of the wall.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A block panel reinforced earth retaining wall, characterized in that it comprises a cushion layer, a foundation is arranged on the cushion layer, blocks are arranged on the foundation, and cap stones are arranged on the tops of the blocks;

[0006] The block comprises a block body, wherein anchor bars are vertically arranged in the block body, the foundation and the cap stone; a tenon is arranged at the bottom of the block body and a groove is arranged at the top, and the tenon and the groove have the same shape and size;

[0007] A filter layer and an inclusion are sequentially arranged behind the building blocks;

[0008] A geogrid is arranged behind the building block, and the geogrid includes a stress-bearing grid and a structural grid; the stress-bearing grid is connected to the inclusion body, and the structural grid is connected to the building block.

[0009] Furthermore, a reserved hole is provided on the block body.

[0010] Furthermore, an eagle's beak is provided at the bottom of the capstone.

[0011] Furthermore, a rectangular groove is provided on the top of the capstone to collect the top water.

[0012] Furthermore, the retaining wall is provided with a settlement joint every 20 to 25 m.

[0013] Furthermore, a row of drain holes is arranged at a position close to the ground at the bottom of the retaining wall, a PVC pipe is arranged in the drain hole, and the PVC pipe extends into the filter layer.

[0014] Furthermore, embedded parts are arranged in the building block. The embedded parts are U-shaped, and the exposed part is horizontally inserted into a connecting rod; the structural grid is wound around the connecting rod and then laid flat in the filler of the roadbed body; the stress grid is wound around the wrapping body and then laid flat in the filler of the roadbed body.

[0015] Furthermore, the foundation pit outside the foundation is backfilled to the original ground elevation.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1) The utility model is not only tightly combined through the friction between the horizontal geogrid and the filler, but also the coping stone, the building block and the foundation are connected into a whole by vertical anchor bars, and the three directions of horizontal, vertical and longitudinal are stressed, and the stress performance is good;

[0018] 2) The utility model forms a drainage system through the drainage groove at the top of the coping stone, the eagle beak at the bottom of the coping stone, the joints between the building block panels and the drainage groove at the bottom, and the drainage performance is good;

[0019] 3) The building block structure of the utility model is simple, convenient for prefabrication, and can form a tight biting force through the tenon and the groove to ensure the structural stability. Description of the drawings

[0020] Figure 1 is a cross-sectional view of the reinforced earth retaining wall with building block panels of the utility model;

[0021] Figure 2 is a schematic diagram of the installation of the connecting steel bars of the building blocks in the reinforced earth retaining wall with building block panels of the utility model;

[0022] Figure 3 is a side view of the building block in the reinforced earth retaining wall with building block panels of the utility model;

[0023] Figure 4 is an elevation view of the building block in the reinforced earth retaining wall with building block panels of the utility model;

[0024] Figure 5 is a top view of the building block in the reinforced earth retaining wall with building block panels of the utility model;

[0025] Figure 6 is a schematic diagram of the connection between the structural grid and the connecting rod in the reinforced earth retaining wall with building block panels of the utility model;

[0026] Figure 7 is a schematic diagram of the connection between the stress grid and the wrapping body in the reinforced earth retaining wall with building block panels of the utility model;

[0027] Figure 8This is the construction sequence diagram of the block panel reinforced earth retaining wall of the present utility model;

[0028] In the figure, 1. coping stone, 2. anchor bar, 3. block, 4. foundation, 5. cushion layer, 6. load-bearing geogrid, 7. structural geogrid, 8. wrapper, 9. filter layer, 10. drain hole, 3-1. block body, 3-2. reserved hole, 3-3. embedded part, 3-4. connecting rod. Specific embodiments

[0029] The present utility model will be described in detail below in conjunction with specific embodiments.

[0030] The block panel reinforced earth retaining wall of the present utility model forms a three-dimensional stress system through horizontal geogrids and vertical anchor bars, with a simple structural form, good stress performance and drainage performance, relatively convenient construction technology, and suitable for various embankment heights. The specific structure is as follows:

[0031] As Figure 1 , 2 shown, the present utility model includes a cushion layer 5, a foundation 4 is arranged on the cushion layer 5, a block 3 is arranged on the foundation 4, and a coping stone 1 is arranged on the top of the block 3; the foundation pit outside the foundation 4 is backfilled and compacted with cement-improved soil with a dry mass of 5% to the original ground elevation.

[0032] The block 3 includes a block body 3-1, and vertical anchor bars 2 are arranged in the block body 3-1, the foundation 4, and the coping stone 1; a tenon is arranged at the bottom of the block body 3-1, and a groove is arranged at the top, and the tenon and the groove have the same shape and size;

[0033] As Figures 3 to 5 shown, the size of the block is 41 cm thick × 28 cm long × 30 cm high, and the outer wall surface size is slightly smaller than the inner wall surface size; the block body 3-1 is precast with concrete, a tenon is arranged at the bottom, and a groove is arranged at the top, and the tenon and the groove should fit perfectly; 4 reserved holes 3-2 are arranged at the top of each block body 3-1, and the reserved holes are kept consistent with the slope of the outer front surface, the slope of the outer wall surface is 1:0.1, and the slope of the reserved holes 3-2 is also 1:0.1; reserved holes are also arranged at the top of the foundation 4 and the bottom of the coping stone 1 for inserting the anchor bars 2; the outside of the foundation 4 is 0.65 m high, the inside is 0.5 m high, 1.0 m wide, and the protruding part is 0.37 m wide; the anchor bars 2 are made of HRB400 galvanized steel with a diameter of 20 mm, and the diameter of the reserved holes is 60 mm.

[0034] A filter layer 9 and a wrapper 8 are arranged in sequence behind the block 3; the wrapper 8 is stacked and built with permeable geotextile bags, and the width of the wrapper is not less than 40 cm; when stacking the wrapper, it should be as flat as possible, and a rolling deformation allowance should be reserved between the outer edge and the blocks; before constructing the upper layer after this layer is compacted, the gap between the wrapper 8 and the panel is backfilled and tamped with sand and gravel to form the filter layer 9;

[0035] A geogrid is provided behind the block 3, and the geogrid includes a load-bearing grid 6 and a structural grid 7; the load-bearing grid 6 is connected to the wrapper 8, and the structural grid 7 is connected to the block 3; the load-bearing grid 6 is mainly used for reinforcing the filler and the wrapper 8.

[0036] Embedded parts 3-3 are arranged inside the block 3. The embedded parts 3-3 are U-shaped, and the exposed part is horizontally inserted into the connecting rod 3-4. The embedded parts 3-3 and the connecting rod 3-4 are made of HRB400 galvanized steel bars with a diameter of 20 mm;

[0037] As Figures 6 to 7 shown, the structural grid 7 is wound around the connecting rod 3-4 for no less than two turns and then laid flat in the subgrade body filler; the load-bearing grid 6 is wound around the wrapper 8 for no less than two turns and then laid flat in the subgrade body filler. The laying length of the structural grid is not less than 3 m, and the laying length of the load-bearing grid is not less than 6 m.

[0038] The geogrid is selected as a high-density polyethylene HDPE uniaxially stretched geogrid, with a vertical spacing of 0.3 m. The width of the geogrid is generally 1.0 m, and the unit area mass ≥ 650 g / m2 / . The inner hole size: A ≤ 320 mm, 12 mm ≤ B ≤ 30 mm; the longitudinal tensile strength of the geogrid should not be less than 160 kN / m, the tensile strength at a longitudinal 2% elongation ≥ 47 kN / m, the tensile strength at a longitudinal 5% elongation ≥ 93 kN / m, and the longitudinal nominal elongation ≤ 11.5%; the carbon black content ≥ 2.0%, the ash content ≤ 1.0%, the carbon black distribution should be uniform, and the dispersion apparent coefficient grade is not lower than grade B; the creep reduction coefficient ≤ 2.2 - 3.0.

[0039] The outer side of the bottom of the coping stone 1 extends beyond the block 3 to form an eave to prevent surface water from affecting the wall body; a rectangular groove with a width of 20 mm and a height of 10 mm is provided at the top of the coping stone 1 to collect the water converging at the top; a settlement joint is provided every 20 - 25 m for the retaining wall, with a joint width of 2 cm, and the joint is filled with asphalt burlap or asphalt wood board. The settlement joints of the retaining wall are connected through with those of the foundation 4; a row of drain holes 10 are provided at a position near the ground at the bottom of the retaining wall, with a spacing of 3.00 m. A PVC pipe with a diameter of 60 mm is arranged inside the drain holes 10, and the PVC pipe extends into the filter layer 9. The slope is 4%, and the water inlet end is wrapped with a permeable geotextile to ensure smooth drainage. In this embodiment, the drainage block is prefabricated in the form of a quarter circle with a diameter and is masoned on-site to form a drain hole.

[0040] As Figure 8As shown in the figure, the construction sequence of the block panel reinforced earth retaining wall of the present utility model is as follows: ① Pour the strip foundation after the implementation of the foundation treatment measures; ② Hang a line on the concrete strip foundation and use M10 cement mortar to lay the first layer of block panels; ③ When laying the stress grille, reserve the length required for the geogrid reverse wrapping package 8, stack the geotextile bags according to the design and tamp them, and tighten the connected stress grille 6; ④ Fill and compact the soil layer by layer, including the filter layer 9 between the package 8 and the panel, and use a light compaction machine or manual ramming within 1.5 m near the panel; ⑤ Insert the connecting rod 3-4 into the exposed part of the embedded part 3-3 of the block 3, and wind the structural grille 7 around the connecting rod 3-4 for no less than two circles and then lay it flat in the roadbed body filler; ⑥ Apply an appropriate amount of mortar in the groove of the block 3 and lay the upper layer of block panels, stagger the upper and lower blocks, and align the upper and lower reserved holes; ⑦ Insert the anchor bar 2 into the reserved hole 3-2 and pour M30 cement mortar; ⑧ After the construction reaches the design height of the panel, pour the reinforced concrete coping stone 1; ⑨ Complete the auxiliary project of the reinforced earth retaining wall and carry out construction acceptance.

[0041] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] The content of the present utility model is not limited to the examples listed. Any equivalent transformation of the technical solution of the present utility model adopted by those of ordinary skill in the art by reading the specification of the present utility model is covered by the claims of the present utility model.

Claims

1. A block panel reinforced earth retaining wall, characterized in that: It comprises a cushion layer (5), a foundation (4) is arranged on the cushion layer (5), a building block (3) is arranged on the foundation (4), and a cap stone (1) is arranged on the top of the building block (3); The building block (3) comprises a building block body (3-1), wherein anchor bars (2) are vertically arranged in the building block body (3-1), a foundation (4), and a cap stone (1); a tenon is arranged at the bottom of the building block body (3-1), and a groove is arranged at the top, and the tenon and the groove have the same shape and size; A filter layer (9) and an inclusion (8) are sequentially arranged behind the building block (3); A geogrid is arranged behind the building block (3), and the geogrid comprises a stress-bearing grid (6) and a structural grid (7); the stress-bearing grid (6) is connected to the inclusion body (8), and the structural grid (7) is connected to the building block (3).

2. A block panel reinforced earth retaining wall according to claim 1, characterized in that: The block body (3-1) is provided with a reserved hole (3-2).

3. A block panel reinforced earth retaining wall according to claim 2, characterized in that: The bottom of the capstone (1) is provided with an eagle's beak.

4. A block panel reinforced earth retaining wall according to claim 3, characterized in that: A rectangular groove is arranged on the top of the cap stone (1) to collect the top runoff.

5. A block panel reinforced earth retaining wall according to claim 4, characterized in that: The retaining wall is provided with a settlement joint every 20 to 25 m.

6. A block panel reinforced earth retaining wall according to claim 5, characterized in that: A drainage hole (10) is arranged at the bottom of the retaining wall close to the ground, a PVC pipe is arranged in the drainage hole (10), and the PVC pipe extends into the filter layer (9).

7. A block panel reinforced earth retaining wall according to claim 6, characterized in that: An embedded part (3-3) is arranged in the building block (3), and the embedded part (3-3) is U-shaped, and the exposed part is horizontally inserted into the connecting rod (3-4); The structural grid (7) is wound around the connecting rods (3-4) and then laid flat in the road base bulk filler; the stress-bearing grid (6) is wound around the enveloping body (8) and then laid flat in the road base bulk filler.

8. The block panel reinforced earth retaining wall according to claim 7, characterized in that: The foundation pit outside the foundation (4) is backfilled to the original ground elevation.

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