Rubble retaining wall and light enclosing wall combined foundation and construction method thereof

Abstract

The invention relates to a rubble retaining wall and light enclosing wall combined foundation which comprises a rubble retaining wall and a light enclosing wall, the light enclosing wall comprises a metal stand column and a metal column foot plate, the plane size of the metal column foot plate is not smaller than 200 mm * 200 mm, the thickness of the metal column foot plate is not smaller than 5 mm, and the metal column foot plate and the metal stand column are welded together; a plurality of foundation trenches with rough inner surfaces are reserved in the rubble retaining wall, the corresponding metal stand columns and the corresponding metal column foot plates extend into the corresponding foundation trenches, plain concrete with the concrete strength of C20 is poured into the foundation trenches, and after the plain concrete is air-dried, a plurality of metal columns and metal column foot plates with the same plane size as the foundation pit are formed. The plain concrete foundations are the same as the foundation pit in depth, and the distance between every two adjacent plain concrete foundations is not larger than 3 m; and a concrete protection layer is poured at the root position of the metal stand column extending out of the plain concrete foundation.

Description

Technical Field

[0001] The invention relates to a combined foundation of a rough stone retaining wall and a light enclosure wall and a construction method thereof. Background Art

[0002] Existing technology: When there is a height difference at the site boundary or it is close to the slope, a retaining wall needs to be set up, and a light fence is set on the retaining wall. The retaining wall can adopt the more economical mortar-laid rubble stone retaining wall, and a strip concrete belt (or pier) is set on the top of the retaining wall. The construction includes the following steps: the construction of the rubble stone retaining wall is completed → the floating slurry, garbage and other debris on the surface of the rubble stone retaining wall are cleaned → the concrete belt (or pier) is laid out → the steel bars are tied and the embedded iron parts of the metal columns of the light fence are fixed → the formwork is supported or the brick membrane is laid → the surface of the retaining wall is soaked with water → concrete is poured → concrete is maintained → the light fence columns are installed → the light fence is installed.

[0003] As the foundation of the lightweight fence, the concrete belt (or pier) is connected to the upper fence through embedded bolts. After the fence is completed, the reinforced concrete belt (or pier) bears all the vertical loads and overturning moments of the upper fence, and transfers the above loads to the lower rubble retaining wall.

[0004] Disadvantages: The foundation of the light fence with rubble stone top cannot be directly rooted on the rubble stone retaining wall, and an additional foundation (reinforced concrete belt or pier) is required to transfer the load. This method uses a large amount of steel bars, concrete and formwork, and the metal columns on the fence are connected to the foundation with embedded parts and bolts. Due to the accuracy or error of on-site installation, the railings are prone to shaking on the top surface of the foundation. The existing foundation method has many processes, the concrete curing time is long, and the construction period is relatively long. Summary of the invention

[0005] The first purpose of the present invention is to provide a combined foundation of a rubble retaining wall and a light-weight fence that optimizes the foundation stress form, reduces the amount of concrete used, saves steel bars in the foundation, and saves formwork or brick membranes.

[0006] The second object of the present invention is to provide a construction method for a combined foundation of a rough stone retaining wall and a light enclosure wall, which can directly pour concrete and save formwork or brick membranes.

[0007] The first object of the present invention is achieved by: A combined foundation of a rough stone retaining wall and a light fence, comprising a rough stone retaining wall and a light fence, wherein the light fence comprises a metal column and a metal column foot plate, wherein the plane size of the metal column foot plate is not less than 200 mm x 200 mm, the thickness of the metal column foot plate is not less than 5 mm, and the metal column foot plate and the metal column are welded together; The rough stone retaining wall is provided with a plurality of foundation grooves with rough inner surfaces, and corresponding metal columns and corresponding metal column foot plates are extended into the corresponding foundation grooves, and plain concrete with a concrete strength of C20 is poured into the foundation grooves, and after the plain concrete is air-dried, a plain concrete foundation with a plane size the same as that of the foundation pit and a depth the same as that of the foundation pit is formed, and the distance between two adjacent plain concrete foundations is not greater than 3m; A concrete protective layer is poured at the root of the metal column extending out of the plain concrete foundation.

[0008] The present invention optimizes the stress form of the foundation, reduces the amount of concrete, and saves steel bars in the foundation. The foundation is plain concrete, the bottom and side walls of the foundation are in direct contact with the rubble stones, the inner surface of the reserved foundation groove of the rubble stone retaining wall is rough, the concrete and the rubble stones of the retaining wall are bonded and meshed with the rough surface, the two have good integrity, and are more conducive to coordinated stress. At this time, a smaller foundation size can provide a higher bearing capacity and can save a lot of reinforced concrete. In addition, by adopting a scheme of directly pouring concrete in the reserved groove, the concrete can be poured directly, which can save templates or brick membranes.

[0009] The concrete of the present invention is located in the rough stone retaining wall, and has good heat preservation and moisture retention effects in the wall. Compared with the traditional construction process, the maintenance cost can be reduced and the concrete strength is more guaranteed.

[0010] The metal column of the present invention is pre-buried as a whole, and the metal column and the foundation are better combined. From a mechanical point of view, it is closer to "rigid connection", the strength of the metal column is more fully exerted, and the overall anti-overturning effect is better. In traditional practices, the metal column and the foundation are connected by embedded parts and bolts. The present invention effectively avoids the installation error or later loosening problem between the embedded parts and the upper metal column.

[0011] The first object of the present invention can also be solved by the following technical measures: Furthermore, the plane size of the plain concrete foundation is 300mmx400mm, and the depth of the plain concrete foundation is 500mm.

[0012] Furthermore, the side length of the plain concrete foundation is not less than h+2c, where h is the plane dimension value of the metal column base plate, and c is the thickness of the concrete protective layer on the side of the metal column base plate.

[0013] Furthermore, the length of the metal column extending into the foundation is not less than 300 mm or 2hc, whichever is greater, where hc is the long side dimension of the metal column.

[0014] Furthermore, a concrete protective layer with a thickness of 50 mm and a height of 150 mm is provided at the root of the metal column.

[0015] The second object of the present invention is achieved by: A construction method for a combined foundation of a rough stone retaining wall and a light enclosure wall comprises the following steps: Step 1: Base groove positioning; Step 2: The rough stone retaining wall is constructed to the designed height and a foundation trench is reserved. The plane size of the foundation trench is 300mmx400mm and the depth of the foundation trench is 500mm; Step 3: Clean up the slurry, garbage and other debris in the foundation trench; Step 4: Water the base trench; Step 5: pouring concrete, pouring plain concrete with a concrete strength of C20 into the foundation trench; Step 6: The corresponding metal column and the corresponding metal column base plate extend into the corresponding foundation groove, and the length of the metal column extending into the foundation is not less than 300mm or 2hc, whichever is greater, where hc is the long side dimension of the metal column.

[0016] Step 7: Position and fix the metal columns, complete the plane size and vertical verticality positioning of the metal columns according to the design requirements, and use column supports 7 to fix the metal columns of the light fence.

[0017] Step 8: Concrete curing: the plain concrete foundation 1 is surrounded by mortar-laid rough stones, which are airtight around the mortar-laid rough stones and have good heat preservation and moisture retention functions, which are conducive to promoting the early strength of concrete and preventing shrinkage cracks caused by water loss in concrete; Step 9: Assemble the railings outside the metal columns to form a lightweight metal fence.

[0018] By adopting the scheme of directly pouring concrete in the reserved groove, the concrete can be poured directly, which can save the formwork or brick membrane.

[0019] The beneficial effects of the present invention are as follows: The present invention optimizes the stress form of the foundation, reduces the amount of concrete, and saves steel bars in the foundation. The foundation is plain concrete, the bottom and side walls of the foundation are in direct contact with the rubble stones, the inner surface of the reserved foundation groove of the rubble stone retaining wall is rough, the concrete and the rubble stones of the retaining wall are bonded and meshed with the rough surface, the two have good integrity, and are more conducive to coordinated stress. At this time, a smaller foundation size can provide a higher bearing capacity and can save a lot of reinforced concrete. In addition, by adopting a scheme of directly pouring concrete in the reserved groove, the concrete can be poured directly, which can save templates or brick membranes.

[0020] The concrete of the present invention is located in the rough stone retaining wall, and has good heat preservation and moisture retention effects in the wall. Compared with the traditional construction process, the maintenance cost can be reduced and the concrete strength is more guaranteed.

[0021] The metal column of the present invention is pre-buried as a whole, and the metal column and the foundation are better combined. From a mechanical point of view, it is closer to "rigid connection", the strength of the metal column is more fully exerted, and the overall anti-overturning effect is better. In traditional practices, the metal column and the foundation are connected by embedded parts and bolts. The present invention effectively avoids the installation error or later loosening problem between the embedded parts and the upper metal column. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the construction method of the combined foundation of the rubble stone retaining wall and the light fence (the state of the metal columns that support and fix the light fence).

[0023] Figure 2 This is a schematic diagram of the combined foundation of a rubble stone retaining wall and a light-weight fence. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Example, combined with Figure 1 and Figure 2 As shown, a combined foundation of a rough stone retaining wall and a light fence comprises a rough stone retaining wall 6 and a light fence, wherein the light fence comprises a metal column 2 and a metal column foot plate 3, wherein the plane size of the metal column foot plate 3 is not less than 200 mm x 200 mm, the thickness of the metal column foot plate 3 is not less than 5 mm, and the metal column foot plate 3 and the metal column 2 are welded together; The rough stone retaining wall 6 is provided with a plurality of foundation grooves 5 with rough inner surfaces, and the corresponding metal columns 2 and the corresponding metal column foot plates 3 are extended into the corresponding foundation grooves 5, and plain concrete with a concrete strength of C20 is poured into the foundation grooves 5, and after the plain concrete is air-dried, a plain concrete foundation 1 with the same plane size as the plane size of the foundation pit and the same depth as the depth of the foundation pit is formed, and the distance between two adjacent plain concrete foundations 1 is not more than 3m; A concrete protective layer 4 is cast at the root of the metal column 2 extending out of the plain concrete foundation 1 .

[0025] Furthermore, the plane size of the plain concrete foundation 1 is 300mmx400mm, and the depth of the plain concrete foundation 1 is 500mm.

[0026] Furthermore, the side length of the plain concrete foundation 1 is not less than h+2c, where h is the plane dimension value of the metal column base plate 3 , and c is the thickness of the concrete protective layer 4 on the side of the metal column base plate 3 .

[0027] Furthermore, the length of the metal column 2 extending into the foundation is not less than 300 mm or 2hc, whichever is greater, where hc is the long side dimension of the metal column 2 .

[0028] Furthermore, the concrete protective layer 4 with a thickness of 50 mm and a height of 150 mm is provided at the root of the metal column 2 .

[0029] A construction method for a combined foundation of a rough stone retaining wall and a light enclosure wall comprises the following steps: Step 1: Positioning the base groove 5; Step 2: The rough stone retaining wall 6 is constructed to the designed height and a foundation trench 5 is reserved. The plane size of the foundation trench 5 is 300 mm x 400 mm, and the depth of the foundation trench 5 is 500 mm. Step 3: Clean the slurry, garbage and other debris in the base groove 5; Step 4: watering and soaking the base trench 5; Step 5: pouring concrete, pouring plain concrete with a concrete strength of C20 into the foundation trench 5; Step six: The corresponding metal column 2 and the corresponding metal column base plate 3 extend into the corresponding base groove 5 , and the length of the metal column 2 extending into the foundation is not less than 300 mm or 2hc, whichever is greater, where hc is the long side dimension of the metal column 2 .

[0030] Step 7: Position and fix the metal column 2, complete the plane size and vertical verticality positioning of the metal column 2 according to the design requirements, and use the column support 7 to fix the metal column 2 of the light fence.

[0031] Step 8: Concrete curing: the plain concrete foundation 1 is surrounded by mortar-laid rough stones, which are airtight around the mortar-laid rough stones and have good heat preservation and moisture retention functions, which are conducive to promoting the early strength of concrete and preventing shrinkage cracks caused by water loss in concrete; Step 9: Assemble the railings outside the metal column 2 to form a light metal fence.

[0032] By adopting the scheme of directly pouring concrete in the reserved groove, the concrete can be poured directly, which can save the formwork or brick membrane.

[0033] The present invention can save steel bars and reduce the amount of concrete. The traditional foundation method adopts the footing form, and the vertical load and the overturning bending moment of the wall are met by increasing the plane size of the reinforced concrete belt (or pier) foundation, which requires a large amount of steel bars and concrete and has a high cost. The foundation of the present invention is plain concrete, and the bottom and side walls of the foundation are in direct contact with the rubble. The surface of the reserved foundation groove 5 of the rubble stone retaining wall is rough. The concrete and the rubble stone of the retaining wall are bonded and bite with the rough surface. The two have good integrity and are more conducive to coordinated force. At this time, a smaller foundation size can provide a higher bearing capacity. In the present invention, the plain concrete foundation 1 is a prism type, and the minimum width of the plain concrete foundation 1 can be 500mm or the larger value of the column foot steel plate width + 2c, where c is the thickness of the protective layer at the end of the metal column foot plate 3. This solution can save a lot of steel bars and concrete.

[0034] The present invention can eliminate the template or brick membrane. In the traditional method, in order to ensure that the concrete is poured according to the designed size and shape, a template or brick membrane needs to be arranged around the foundation. The size of the reserved foundation groove 5 of the rough stone retaining wall of the present invention is the same as that of the foundation, and there is no need to set up a template or brick membrane.

[0035] The present invention has better concrete curing effect, high early strength, few cracks and good durability. The periphery of the foundation concrete of the present invention is surrounded by mortar-laid rough stones, and the periphery of the mortar-laid rough stones is sealed, which has good heat preservation and moisture retention functions, is conducive to promoting the early strength of concrete, and prevents concrete from losing water and causing shrinkage cracks. Compared with the traditional foundation of exposed component curing, the quality of concrete is easier to ensure. Since the strength is generated early, it is conducive to the next step of the process, which can save construction time. The advantages are more obvious in winter construction in cold areas.

[0036] The upper metal column 2 of the present invention is well connected to the plain concrete foundation 1, and the force transmission is more direct. In the traditional method, the upper metal column 2 is connected to the foundation through embedded steel plates and embedded bolts, and the metal column 2 transmits the upper load to the concrete foundation through bolts and steel plates. A concrete protective layer 4 needs to be laid on the upper part to connect the steel plates and bolts. There is a risk of falling off, rusting, and loosening during later use, and the durability is poor. At the same time, the positioning accuracy of the embedded parts of the traditional method has a great influence on the positioning of the entire wall. The present invention directly embeds the column feet of the metal column 2 into the foundation and completes the positioning of the metal column 2. The metal column 2 forms a whole with the foundation and the retaining wall, and the upper load can be directly transmitted to the foundation, and the force transmission is more direct and effective.

[0037] In the traditional practice, under horizontal load, eccentric bending moment occurs at the base, and the overall stability of the wall needs to be ensured by increasing the size of the foundation footing. In the present invention, since the light metal column 2 is formed as a whole with the rough stone retaining wall through the foundation concrete, the anti-overturning ability is strong. Therefore, the requirements can be met without increasing the size of the foundation, and the force form is significantly better than the traditional practice.

Claims

1. A combined foundation of a rubble stone retaining wall and a light enclosure wall, comprising a rubble stone retaining wall (6) and a light enclosure wall, characterized in that: The light fence comprises a metal column (2) and a metal column base plate (3), the plane size of the metal column base plate (3) is not less than 200 mm x 200 mm, the thickness of the metal column base plate (3) is not less than 5 mm, and the metal column base plate (3) and the metal column (2) are welded together; The rough stone retaining wall (6) is provided with a plurality of foundation grooves (5) with rough inner surfaces, and corresponding metal columns (2) and corresponding metal column foot plates (3) are extended into the corresponding foundation grooves (5), and plain concrete with a concrete strength of C20 is poured into the foundation grooves (5), and after the plain concrete is air-dried, a plain concrete foundation (1) having a plane size identical to that of the foundation pit and a depth identical to that of the foundation pit is formed, and a distance between two adjacent plain concrete foundations (1) is not greater than 3 m; A concrete protective layer (4) is cast at the root of the metal column (2) extending out of the plain concrete foundation (1).

2. The combined foundation of the rough stone retaining wall and the light wall according to claim 1 is characterized by: The plane size of the plain concrete foundation (1) is 300 mm x 400 mm, and the depth of the plain concrete foundation (1) is 500 mm.

3. The combined foundation of rough stone retaining wall and light wall according to claim 1 is characterized by: The side length of the plain concrete foundation (1) is not less than h+2c, where h is the plane dimension value of the metal column base plate (3), and c is the thickness of the concrete protective layer (4) on the side of the metal column base plate (3).

4. The combined foundation of rough stone retaining wall and light wall according to claim 1 is characterized by: The length of the metal column (2) extending into the foundation is not less than 300 mm or 2hc, whichever is greater, where hc is the length of the long side of the metal column (2).

5. The combined foundation of rough stone retaining wall and light wall according to claim 1 is characterized by: The concrete protective layer (4) having a thickness of 50 mm and a height of 150 mm is provided at the root of the metal column (2).

6. A construction method for a combined foundation of a rough stone retaining wall and a light wall, comprising the following steps: Step 1: positioning the base groove (5); Step 2: The rough stone retaining wall (6) is constructed to the designed height and a foundation trench (5) is reserved, wherein the plane size of the foundation trench (5) is 300 mm x 400 mm, and the depth of the foundation trench (5) is 500 mm; Step 3: Clean the slurry, garbage and other debris in the foundation groove (5); Step 4: watering the base trench (5); Step 5: pouring concrete, pouring plain concrete with a concrete strength of C20 into the foundation trench (5); Step 6: The corresponding metal column (2) and the corresponding metal column base plate (3) extend into the corresponding base groove (5), and the length of the metal column (2) extending into the foundation is not less than 300 mm or 2hc, whichever is greater, where hc is the long side dimension of the metal column (2).

7. Step 7: Position and fix the metal column (2), complete the plane size and vertical verticality positioning of the metal column (2) according to the design requirements, and use the column support (7) to fix the metal column (2) of the light fence.

8. Step 8: Concrete curing, plain concrete foundation (1) The perimeter is surrounded by mortar-laid rough stones. The mortar-laid rough stones are airtight around the perimeter, which has good heat preservation and moisture retention functions, is conducive to promoting the early strength of concrete and preventing shrinkage cracks caused by water loss in concrete; Step 9: Assemble the railings outside the metal columns (2) to form a light metal fence.

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