1. The utility model provides a basement roof backfill structure which characterized in that: including establishing a plurality of layers of backfill layer above the basement roof, a plurality of backfill layers are laid from the basement roof to the upper level in proper order, and these a plurality of backfill layers include extruded polystyrene foam board bed course.

2. The backfill structure for the top plate of the basement according to claim 1, characterized in that: the multiple backfill layers comprise a planting soil layer and a plain backfill soil layer, and the extruded polystyrene foam board cushion layer is arranged between the planting soil layer and the plain backfill soil layer.

3. The backfill structure for the top plate of the basement according to claim 1, characterized in that: the backfill layers sequentially comprise a cement mortar leveling layer with the thickness of 20: 1 from the top plate of the basement to the top; two 1.5 thick CPS series reaction bonding type macromolecule layers; 1.2 a thick high-density polyethylene geomembrane layer; 10 thick cement mortar leveling layer; a foam concrete layer of grade A05 with the volume weight of 500kg/m3 and the thickness of 360 mm; a 70-thick C20 concrete protective layer of a [email protected] bidirectional reinforcing mesh is arranged in the concrete storage bin, and a bin dividing seam is arranged at each 6000 mm; 10-20 thick mesh interweaved drainage plate layers; not less than 200g/m²A non-woven fabric filter layer;a fine sand layer with the thickness of 100 mm; a plain backfill soil layer with the thickness of 50-300 mm; an extruded polystyrene foam plank backing layer having a bulk weight of less than or equal to 0.5KN/m 3; planting soil layer with thickness of 900-2000 mm.

4. The backfill structure for the top plate of the basement according to claim 1, characterized in that: the backfill layers sequentially comprise a cement mortar leveling layer with the thickness of 20: 1 from the top plate of the basement to the top; two 1.5 thick CPS series reaction bonding type macromolecule layers; 1.2 a thick high-density polyethylene geomembrane layer; 10 thick cement mortar leveling layer; a foam concrete layer of grade A05 with the volume weight of 500kg/m3 and the thickness of 360 mm; a 70-thick C20 concrete protective layer of a [email protected] bidirectional reinforcing mesh is arranged in the concrete storage bin, and a bin dividing seam is arranged at each 6000 mm; a graded crushed stone layer with the thickness of more than 300 mm; 10-20 thick mesh interweaved drainage plate layers; not less than 200g/m2 nonwoven filter layer; a fine sand layer with the thickness of 100 mm; a plain backfill soil layer with the thickness of 50-300 mm; an extruded polystyrene foam plank backing layer having a bulk weight of less than or equal to 0.5KN/m 3; planting soil layer with thickness of 900-2000 mm.

5. The backfill structure for the top plate of basement according to claim 1, 2, 3 or 4, characterized in that: the extruded polystyrene foam board cushion layer comprises a plurality of extruded polystyrene foam boards, and the extruded polystyrene foam boards are spliced and connected with each other.

6. The backfill structure for the top plate of basement according to claim 1, 2, 3 or 4, characterized in that: and connecting two adjacent extruded polystyrene foam boards by using the twisted steel for each extruded polystyrene foam board.

7. The backfill structure for the top plate of the basement according to claim 6, characterized in that: the extruded polystyrene foam panels were connected using 1.2m by 2.5m gauge rebar.

8. The basement roof backfilling construction process is characterized in that: the basement roof is a waterproof reinforced concrete roof, and a waterproof layer, a foam concrete layer, a concrete protective layer, a net-shaped interwoven drainage plate layer, a non-woven fabric filter layer, a fine sand layer, a backfill soil layer, an extruded polystyrene foam plate cushion layer and a planting soil layer are sequentially constructed on the waterproof reinforced concrete roof.

9. The basement roof backfilling construction process according to claim 8, wherein the backfilling construction process comprises the following steps: and a graded crushed stone layer is also constructed between the concrete protective layer and the reticular interweaved drainage plate layer.

10. The basement roof backfilling construction process according to claim 8 or 9, wherein the backfilling construction process comprises the following steps: the slope of the structure is found from the foam concrete layer, and the gradient is 2.5 percent.

Background

For sponge city landscape modeling and water storage, at present, planting soil is mostly adopted to divide contour lines for slope building and landscape building; when the height difference of the structural plate is large, the gradient is changeable, the thickness of a planting soil layer is large, the soil water absorption and storage water are large, the structural bearing capacity is large and other uncontrollable safety factors are large, the requirement on the stress calculation load of the structural top plate is high, and the construction cost is greatly increased.

Disclosure of Invention

The invention provides a basement roof backfill structure and a construction process, which overcome the defects of the prior art in the background technology.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a basement roof backfill structure, it is including establishing a plurality of layers of backfill layer above the basement roof, a plurality of backfill layers are laid from the basement roof to the upper hierarchy in proper order, and these a plurality of backfill layers include extrusion molding polystyrene cystosepiment bed course.

In one embodiment: the multiple backfill layers comprise a planting soil layer and a plain backfill soil layer, and the extruded polystyrene foam board cushion layer is arranged between the planting soil layer and the plain backfill soil layer.

In one embodiment: the backfill layers sequentially comprise a cement mortar leveling layer with the thickness of 20: 1 from the top plate of the basement to the top; two 1.5 thick CPS series reaction bonding type macromolecule layers; 1.2 a thick high-density polyethylene geomembrane layer; 10 thick cement mortar leveling layer; a foam concrete layer of grade A05 with the volume weight of 500kg/m3 and the thickness of 360 mm; a 70-thick C20 concrete protective layer of a [email protected] bidirectional reinforcing mesh is arranged in the concrete storage bin, and a bin dividing seam is arranged at each 6000 mm; 10-20 thick mesh interweaved drainage plate layers; not less than 200g/m²A non-woven fabric filter layer; a fine sand layer with the thickness of 100 mm; a plain backfill soil layer with the thickness of 50-300 mm; an extruded polystyrene foam plank backing layer having a bulk weight of less than or equal to 0.5KN/m 3; planting soil layer with thickness of 900-2000 mm.

In one embodiment: the backfill layers sequentially comprise a cement mortar leveling layer with the thickness of 20: 1 from the top plate of the basement to the top; two 1.5 thick CPS series reaction bonding type macromolecule layers; 1.2 a thick high-density polyethylene geomembrane layer; 10 thick cement mortar leveling layer; a foam concrete layer of grade A05 with the volume weight of 500kg/m3 and the thickness of 360 mm; a 70-thick C20 concrete protective layer of a [email protected] bidirectional reinforcing mesh is arranged in the concrete storage bin, and a bin dividing seam is arranged at each 6000 mm; a graded crushed stone layer with the thickness of more than 300 mm; 10-20 thick mesh interweaved drainage plate layers; not less than 200g/m2 nonwoven filter layer; a fine sand layer with the thickness of 100 mm; a plain backfill soil layer with the thickness of 50-300 mm; an extruded polystyrene foam plank backing layer having a bulk weight of less than or equal to 0.5KN/m 3; planting soil layer with thickness of 900-2000 mm.

In one embodiment: the extruded polystyrene foam board cushion layer comprises a plurality of extruded polystyrene foam boards, and the extruded polystyrene foam boards are spliced and connected with each other.

In one embodiment: and connecting two adjacent extruded polystyrene foam boards by using the twisted steel for each extruded polystyrene foam board.

In one embodiment: the extruded polystyrene foam panels were connected using 1.2m by 2.5m gauge rebar.

A basement roof backfilling construction process comprises the steps that a waterproof layer, a foam concrete layer, a concrete protective layer, a net-shaped interweaving drainage plate layer, a non-woven fabric filter layer, a fine sand layer, a backfilling soil layer, an extruded polystyrene foam plate cushion layer and a planting soil layer are sequentially constructed on a waterproof reinforced concrete roof.

In one embodiment: and a graded crushed stone layer is also constructed between the concrete protective layer and the reticular interweaved drainage plate layer.

In one embodiment: the slope of the structure is found from the foam concrete layer, and the gradient is 2.5 percent.

Compared with the background technology, the technical scheme has the following advantages:

1 the present case uses the extrusion molding polystyrene cystosepiment to replace the backfill soil layer, has avoided planting soil layer water absorption rate height to influence the structure drainage and greatly reduced the bearing load of structure roof. The extruded polystyrene foam board has the advantages of small compression deformation of the cushion layer, stable chemical property in water and soil, no decomposition by microorganisms, good integrity, stability and safety.

2. Extruded polystyrene cystosepiment bed course adopts the twisted steel to establish ties, because extruded polystyrene cystosepiment water absorption rate is low, and the material is lighter, if can't carry out effectual series connection, causes extruded polystyrene cystosepiment come-up easily. The extruded polystyrene foam boards are also conveniently assembled by connecting the twisted steel bars in series, labor force and construction machinery investment can be greatly reduced, the construction period is shortened, and the cost is reduced.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic cross-sectional view of a basement roof backfill structure.

FIG. 2 is a schematic plan view of a cushion layer of an extruded polystyrene foam board.

Detailed Description

Referring to fig. 1 and 2, the basement top plate is a waterproof reinforced concrete top plate, and a waterproof layer, a foam concrete layer, a concrete protective layer, a net-shaped interwoven drainage plate layer, a non-woven fabric filter layer, a fine sand layer, a backfill soil layer, an extruded polystyrene foam plate cushion layer and a planting soil layer are sequentially constructed on the waterproof reinforced concrete top plate. A graded crushed stone layer can be constructed between the concrete protective layer and the reticular interweaved drainage plate layer. If the structure is required to find the slope, the structure is found the slope from the foam concrete layer, and the slope is 2.5%.

The construction can be carried out on each backfill layer on the top plate of the basement according to the following parameters, and cement mortar leveling layers with the thickness of 20: 3 are sequentially constructed from the top plate 7 of the basement upwards; two 1.5 thick CPS series reaction bonding type macromolecule layers; 1.2 a thick high-density polyethylene geomembrane layer; 10 thick cement mortar leveling layer; a foam concrete layer of grade A05 with the volume weight of 500kg/m3 and the thickness of 360 mm; a 70-thick C20 concrete protective layer 6 internally provided with a [email protected] bidirectional reinforcing mesh is arranged, and each 6000mm is provided with a bin dividing seam; 10-20 thick mesh interweaved drainage plate layers; not less than 200g/m2 nonwoven filter layer; a fine sand layer 4 with the thickness of 100 mm; a plain backfill soil layer 3 with the thickness of 50-300 mm; an extruded polystyrene foam plank backing layer 2 having a bulk weight of less than or equal to 0.5KN/m 3; a planting soil layer 1 with the thickness of 900-2000 mm. A graded crushed stone layer 5 with the thickness of more than 300mm can be constructed between the concrete protective layer and the reticular interweaved drainage plate layer;

when the extruded polystyrene foam board cushion layer is constructed, a plurality of extruded polystyrene foam boards 21 can be spliced and connected to form the extruded polystyrene foam board cushion layer, each extruded polystyrene foam board 21 is arranged according to a standard board with the length, the width and the height of 2000 x 600 x 50mm, a round hole 8 of DN60mm is formed in each board surface, one round hole 8 is arranged according to the distance 760mm in the long side direction of each board surface, and one round hole is arranged according to the distance 600mm in the short side direction. Each of the extruded polystyrene foam boards 21 connects adjacent extruded polystyrene foam boards 21 with twisted steel 9. Specifically, each of the extruded polystyrene foam boards 21 was connected by a twisted steel bar of 1.2m by 2.5m in gauge.

A basement roof backfill structure refers to figures 1 and 2 and comprises a plurality of backfill layers arranged above a basement roof, wherein the backfill layers are sequentially laid from a basement roof 7 to the upper side in a hierarchical mode, and the backfill layers comprise extruded polystyrene foam board cushion layers 2. The extrusion molding polystyrene foam board is used for replacing a backfill soil layer, the high water absorption of the planting soil layer 1 is prevented from influencing the drainage of the structure, and the bearing load of the top plate (the basement top plate 7) of the structure is greatly reduced. The extruded polystyrene foam board cushion layer 2 has small compression deformation, stable chemical property in water and soil, no decomposition by microorganism, and good integrity, stability and safety.

The backfill structure can comprise a waterproof layer, a foam concrete layer, a concrete protective layer, a net-shaped interweaving drainage plate layer, a non-woven fabric filter layer, a fine sand layer, a backfill soil layer, an extruded polystyrene foam plate cushion layer and a planting soil layer. A graded crushed stone layer can be constructed between the concrete protective layer and the reticular interweaved drainage plate layer. The extruded polystyrene foam board cushion layer is arranged between the planting soil layer and the plain backfill soil layer.

In a preferred embodiment, each layer of the backfill layers from the top plate 7 of the basement upwards comprises 20-thick 1:3 cement mortar leveling layers; two 1.5 thick CPS series reaction bonding type macromolecule layers; 1.2 a thick high-density polyethylene geomembrane layer; 10 thick cement mortar leveling layer; a foam concrete layer of grade A05 with the volume weight of 500kg/m3 and the thickness of 360 mm; a 70-thick C20 concrete protective layer 6 internally provided with a [email protected] bidirectional reinforcing mesh is arranged, and each 6000mm is provided with a bin dividing seam; 10-20 thick mesh interweaved drainage plate layers; not less than 200g/m²A non-woven fabric filter layer; a fine sand layer 4 with the thickness of 100 mm; a plain backfill soil layer 3 with the thickness of 50-300 mm; an extruded polystyrene foam plank backing layer 2 having a bulk weight of less than or equal to 0.5KN/m 3; a planting soil layer 1 with the thickness of 900-2000 mm.

In another preferred embodiment, the backfill layers sequentially comprise 20-thick 1:3 cement mortar leveling layers from the top plate 7 of the basement to the upper layer; two 1.5 thick CPS series reaction bonding type macromolecule layers; 1.2 a thick high-density polyethylene geomembrane layer; 10 thick cement mortar leveling layer; a foam concrete layer of grade A05 with the volume weight of 500kg/m3 and the thickness of 360 mm; a 70-thick C20 concrete protective layer 6 internally provided with a [email protected] bidirectional reinforcing mesh is arranged, and each 6000mm is provided with a bin dividing seam; a graded crushed stone layer 5 with the thickness of more than 300 mm; 10-20 thick mesh interweaved drainage plate layers; not less than 200g/m2 nonwoven filter layer; a fine sand layer 4 with the thickness of 100 mm; a plain backfill soil layer 3 with the thickness of 50-300 mm; an extruded polystyrene foam plank backing layer 2 having a bulk weight of less than or equal to 0.5KN/m 3; a planting soil layer 1 with the thickness of 900-2000 mm.

The extruded polystyrene foam sheet mat 2 includes a plurality of extruded polystyrene foam sheets 21, which are spliced and connected to each other. Each extruded polystyrene foam board 21 is arranged according to a standard board with the length, width and height of 2000 x 600 x 50mm, round holes 8 of DN60mm are arranged on the board surface of each board, the round holes 8 are arranged one by one according to the distance of 760mm in the long side direction of each board surface, and the round holes 8 are arranged one by one according to the distance of 600mm in the short side direction. Each of the extruded polystyrene foam boards 21 connects two adjacent extruded polystyrene foam boards 21 with a twisted steel bar 9. Specifically, each of the extruded polystyrene foam boards 21 was connected by a twisted steel bar of 1.2m by 2.5m in gauge. The extruded polystyrene foam boards are also conveniently assembled by connecting the twisted steel bars in series, labor force and construction machinery investment can be greatly reduced, the construction period is shortened, and the cost is reduced.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.