A drainage ditch at the bottom of a foundation pit

Abstract

The present application discloses a drainage ditch at the bottom of a foundation pit, comprising: a base layer constructed on a hard rock layer at the bottom of the foundation pit; a brickwork layer, the brickwork layer is laid on the base layer at intervals, and the inner side surface of the brickwork layer and the top surface of the base layer form a concave groove space; a backfill layer on the base layer outside the brickwork layer; and a mortar plaster layer, the mortar plaster layer covers the inner side surface of the brickwork layer, the top surface of the base layer, the top of the backfill layer and the top of the brickwork layer. When the mortar plaster layer on the top of the backfill layer and the brickwork layer is subjected to a pressure load, the steel bar layer can disperse the pressure load and transfer the pressure load to the harder brickwork layer in combination with the bending section, so as to avoid cracking of the mortar plaster layer on the top of the backfill layer and the brickwork layer, and solve the problem that the mortar plaster layer covering the top of the brickwork layer and the backfill layer is easy to crack after being compressed.

Description

Technical Field

[0001] The utility model relates to a drainage ditch at the bottom of a foundation pit and belongs to the technical field of foundation pit drainage construction. Background Art

[0002] After the foundation pit is excavated downwards and formed, since the foundation pit is at a low position, the water in the foundation pit needs to be guided to the sump through the drainage ditch at the bottom of the foundation pit.

[0003] When constructing the drainage ditch, a mortar plaster layer needs to be used for leveling (see Chinese patent announcement number CN220377488U). However, when the top of the drainage ditch is leveled with a mortar plaster layer, the mortar plaster layer sometimes needs to cover the top of the brickwork layer and the backfill layer. Due to the difference in compression deformation between the brickwork layer and the backfill layer, the mortar plaster layer covering the top of the brickwork layer and the backfill layer is prone to cracking after being compressed. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a drainage ditch at the bottom of a foundation pit.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a foundation pit bottom drainage ditch, comprising:

[0007] The construction is at the base layer on the hard rock layer at the bottom of the foundation pit;

[0008] Brickwork layers are laid on the base layer at intervals, and the inner side of the brickwork layers and the top surface of the base layer form a concave groove space;

[0009] A backfill layer on the base layer outside the brickwork layer;

[0010] It also includes a mortar plaster layer, which covers the inner side of the brickwork layer, the top surface of the base layer, the top of the backfill layer and the top of the brickwork layer.

[0011] The mortar plastering layer located on the top of the backfill layer and the top of the brickwork layer has a steel bar layer, and a curved section is pre-buried and fixed in the brickwork layer at the bottom of the steel bar layer.

[0012] The brickwork layer is bricks and cement mortar; the backfill layer is backfill soil and rocks.

[0013] The steel bar layer is formed by bending a single steel bar or forming an integral steel bar mesh.

[0014] One side of the mortar plastering layer is the foundation pit retaining wall slope.

[0015] The other side of the mortar plaster layer is provided with a basement retaining wall strip foundation bottom layer, and the steel bar layer extends from the mortar plaster layer to the basement retaining wall strip foundation bottom layer.

[0016] The beneficial effect of the utility model is that when the mortar plaster layer on the top of the backfill layer and the brickwork layer is subjected to a compressive load, the steel bar layer can disperse the compressive load and transfer the compressive load to the harder brickwork layer in combination with the bending section, thereby avoiding cracking of the mortar plaster layer on the top of the backfill layer and the brickwork layer, and solving the problem that the mortar plaster layer on the top of the brickwork layer and the backfill layer is prone to cracking after being subjected to pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main cross section of the utility model;

[0018] In the figure: 1-base layer; 2-brickwork layer; 3-backfill layer; 4-mortar plaster layer; 5-reinforcement layer; 51-bend section; 6-basement retaining wall strip foundation bottom layer; 7-foundation pit retaining wall slope. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0020] like Figure 1 shown.

[0021] A foundation pit bottom drainage ditch of the present application comprises:

[0022] The base layer 1 is formed by pouring and curing concrete, and the base layer 1 is located on the hard rock layer at the bottom of the foundation pit. Brick layers 2 are laid on the base layer 1 at intervals, and the inner side of the brick layers 2 and the top surface of the base layer 1 form a concave groove space. The brick layers 2 are composed of bricks and cement mortar.

[0023] On the base layer 1 outside the brickwork layer 2 there is a backfill layer 3 formed by rolling and compacting backfilled soil and rocks.

[0024] It also includes a mortar plaster layer 4, which covers the inner side of the brickwork layer 2, the top surface of the base layer 1, the top of the backfill layer 3 and the top of the brickwork layer 2. The mortar plaster layer 4 at the top of the backfill layer 3 and the top of the brickwork layer 2 has a steel bar layer 5, and the bottom of the steel bar layer 5 has a bent section 51 pre-embedded and fixed in the brickwork layer 2. The steel bar layer 5 can be formed by bending a single steel bar or forming a steel bar surface with an integral steel bar mesh.

[0025] When the pressure load is applied to the mortar plaster layer 4 on the top of the backfill layer 3 and the brickwork layer 2, the steel layer 5 can disperse the pressure load and transfer the pressure load to the harder brickwork layer 2 in combination with the bending section 51, thereby avoiding cracking of the mortar plaster layer 4 on the top of the backfill layer 3 and the brickwork layer 2, and solving the problem that the mortar plaster layer on the top of the brickwork layer and the backfill layer is prone to cracking after being compressed.

[0026] One side of the mortar plaster layer 4 is a foundation pit retaining wall slope 7; the other side of the mortar plaster layer 4 has a basement retaining wall strip foundation bottom layer 6, and the steel bar layer 5 extends from the mortar plaster layer 4 to the basement retaining wall strip foundation bottom layer 6.

Claims

1. A drainage ditch at the bottom of a foundation pit, characterized in that: include: The construction is a base layer on the hard rock layer at the bottom of the foundation pit (1); Brickwork layers (2), the brickwork layers (2) are laid on the base layer (1) at intervals, and the inner side surface of the brickwork layers (2) and the top surface of the base layer (1) form a concave groove space; A backfill layer (3) on the base layer (1) outside the brickwork layer (2); It also includes a mortar plaster layer (4), which covers the inner side of the brickwork layer (2), the top surface of the base layer (1), the top of the backfill layer (3) and the top of the brickwork layer (2).

2. The foundation pit bottom drainage ditch according to claim 1, characterized in that: The mortar plaster layer (4) located on the top of the backfill layer (3) and the top of the brickwork layer (2) has a steel bar layer (5), and a bent section (51) is pre-buried and fixed in the brickwork layer (2) at the bottom of the steel bar layer (5).

3. The foundation pit bottom drainage ditch according to claim 1, characterized in that: The brickwork layer (2) is made of bricks and cement mortar; the backfill layer (3) is made of backfill soil and rocks.

4. The foundation pit bottom drainage ditch according to claim 2, characterized in that: The steel bar layer (5) is formed by bending a single steel bar or forming an integral steel bar mesh.

5. The foundation pit bottom drainage ditch according to claim 1, characterized in that: One side of the mortar plaster layer (4) is a foundation pit wall slope (7).

6. The foundation pit bottom drainage ditch according to claim 5, characterized in that: The other side of the mortar plaster layer (4) is provided with a basement retaining wall strip foundation bottom layer (6), and the steel bar layer (5) extends from the mortar plaster layer (4) into the basement retaining wall strip foundation bottom layer (6).

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