阅读说明：本技术 一种地下室回填土层结构楼板施工方法 (Basement backfill soil layer structure floor slab construction method ) 是由 王亚刚 于 2021-06-25 设计创作，主要内容包括：一种地下室回填土层结构楼板施工方法,按照原设计图纸施工完后,结构混凝土板上顶面与结构梁上顶面平齐,即混凝土结构板是在结构梁中,混凝土结构板受力作用于下部回填上,其特征在于包括以下步骤：a、按照新设计施工,使原设计的结构梁下移,b、所述结构梁下移高度为结构板厚度,确保结构板面标高不变,满足净高要求,c、结构板与梁连接部位、与墙连接部位分别植筋,d、结构板面控制点间距按照1200mm间隔设定,e、回填土上及结构梁部位安装平面钢筋网片,f、浇筑结构板面混凝土。本发明的地下室回填土层结构楼板施工方法,通过对结构梁板结构的施工工艺改进,解决板面裂缝的问题,而且大大提高回填土和施工楼板的工期效率。(The utility model provides a basement backfill soil layer structure floor construction method, constructs according to former design drawing after, and the top surface is the parallel and level on structural concrete slab and the structure roof beam, and concrete structural slab is in the structure roof beam promptly, and concrete structural slab atress acts on the lower part to backfill, its characterized in that includes following step: a. and (c) respectively planting ribs at the connecting part of the structural slab and the beam and the connecting part of the structural slab and the wall, setting the spacing between d and structural slab surface control points at intervals of 1200mm, mounting a plane reinforcing steel bar net piece on the backfill soil and the structural beam part, and f, pouring structural slab surface concrete. The construction method of the basement backfill soil layer structure floor slab solves the problem of slab surface cracks through the improvement of the construction process of the structural beam slab structure, and greatly improves the construction period efficiency of backfill soil and the construction floor slab.)

1. The utility model provides a basement backfill soil layer structure floor construction method, constructs according to former design drawing after, and the top surface is the parallel and level on structural concrete slab and the structure roof beam, and concrete structural slab is in the structure roof beam promptly, and concrete structural slab atress acts on the lower part to backfill, its characterized in that includes following step:

a. constructing according to the new design, and moving the originally designed structural beam downwards;

b. the downward moving height of the structural beam is the thickness of the structural plate, so that the height of the structural plate is ensured to be unchanged, the clear height requirement is met, and the structural plate is applied to the structural beam during construction;

c. respectively planting ribs at the connecting part of the structural slab and the beam and the connecting part of the structural slab and the wall;

planting bars at the connecting part of the structural beam and the shear wall on the structural slab, wherein the length of the exposed bars of the planted bars is not less than 4/5 of the thickness of the floor slab;

d. the space between the structural plate surface control points is set according to 1200mm intervals, the height of the structural plate surface is controlled according to the elevation of the concrete structural plate surface, the elevation control points are made of concrete, and the strength is not lower than C20;

e. installing a plane reinforcing mesh on the backfill soil and the structural beam part;

f. and pouring structural slab concrete.

2. The construction method of the basement backfill soil structure floor slab as claimed in claim 1, wherein the specification model of the steel bars of the embedded steel bars is HRB400E phi 18, and the steel bar spacing is 200 mm.

3. The construction method of the basement backfill soil structure floor slab as claimed in claim 1, wherein the structural beam moves downwards according to the plate surface elevation on the basis of the original design, the height of the original frame beam moves downwards is the thickness of the structural plate at the position, and the subsequent structural plate is enabled to be stressed on the structural beam, and the height of the structural beam moving downwards cannot be too large.

Technical Field

The invention relates to a floor slab construction method, in particular to a floor slab construction method of a basement backfill soil layer structure.

Background

With the continuous development of the building market, the height of a house is gradually increased, the building height is increased, and the foundation stability is particularly critical, particularly, the anti-floating measures must be in place for the building structure with rich underground water level. In order to meet the anti-floating requirement of many high-rise buildings, anti-pulling piles, additional counter weights, anti-floating anchor rods and the like are designed. In the aspect of increasing the balance weight, due to the limitation of conditions, the basement ground is mostly filled with materials with larger volume weight, the basement top plate is covered with soil, the thickness of the basement top plate is increased, and the like. Some buildings do not relate to basements, but raft plates are designed below +/-0, and backfill soil is adopted between the raft plates and the plate surface of one floor to increase the balance weight so as to meet the anti-floating requirement.

Backfilling soil between the basement raft and a slab surface, compacting after backfilling, and then constructing a layer of structural concrete slab on the compacted soil surface. Due to the fact that the depth of the backfill soil is too deep and the settling time is too long, the situation of unstable settling is easy to occur, and the problem of cracks on the surface of the structural plate is caused. Because the surface of the concrete structure of one layer is positioned at the bottom layer and is in direct contact with the backfill soil, if quality problems such as cracks occur, the leakage of the bottom plate is easy to generate.

The known basement backfill soil structure floor thus suffers from the inconveniences and problems described above.

Disclosure of Invention

The invention aims to provide a safe and reliable construction method of a basement backfill soil layer structure floor slab.

In order to achieve the purpose, the technical solution of the invention is as follows:

the utility model provides a basement backfill soil layer structure floor construction method, constructs according to former design drawing after, and the top surface is the parallel and level on structural concrete slab and the structure roof beam, and concrete structural slab is in the structure roof beam promptly, and concrete structural slab atress acts on the lower part to backfill, its characterized in that includes following step:

a. constructing according to the new design, and moving the originally designed structural beam downwards;

b. the downward moving height of the structural beam is the thickness of the structural plate, so that the height of the structural plate is ensured to be unchanged, the clear height requirement is met, and the structural plate is applied to the structural beam during construction;

c. respectively planting ribs at the connecting part of the structural slab and the beam and the connecting part of the structural slab and the wall;

planting bars at the connecting part of the structural beam and the shear wall on the structural slab, wherein the length of the exposed bars of the planted bars is not less than 4/5 of the thickness of the floor slab;

d. the space between the structural plate surface control points is set according to 1200mm intervals, the height of the structural plate surface is controlled according to the elevation of the concrete structural plate surface, the elevation control points are made of concrete, and the strength is not lower than C20;

e. installing a plane reinforcing mesh on the backfill soil and the structural beam part;

f. and pouring structural slab concrete.

The construction method of the basement backfill soil layer structure floor slab can be further realized by adopting the following technical measures.

In the method, the specification and model of the steel bars of the embedded steel bars are HRB400E phi 18, and the steel bar spacing is 200 mm.

In the method, the step of downwards moving the structural beam is that on the basis of the original design, the original frame beam is downwards moved according to the elevation of the plate surface, and the downwards moving height is the thickness of the structural plate at the position, so that the subsequent structural plate is stressed to act on the structural beam, and the downwards moving height of the structural beam cannot be too large.

After the technical scheme is adopted, the construction method of the basement backfill soil layer structure floor slab has the following advantages:

1. the problem of cracks on the surface of the building floor caused by unbalanced settlement of subsequent backfilling is solved;

2. the efficiency of the time limit for a project of backfill and construction of the floor slab is greatly improved, and the quality, quantity and progress are guaranteed.

Drawings

FIG. 1 is a schematic view of a concrete structural slab and lower backfill structure according to an embodiment of the present invention;

FIG. 2 is a perspective view of a layer of structural panel construction according to an embodiment of the present invention;

FIG. 3 is a schematic view of a structural panel and structure at the same height according to an embodiment of the present invention;

fig. 4 is a schematic view of the connection portion between the structural slab and the beam and the wall of the embodiment of the invention.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

Example 1

The invention discloses a construction method of a basement backfill soil layer structure floor slab, which comprises the following process flows: 1) shifting the elevation of the original designed structural beam down to the thickness height of the structural plate; 2) backfilling and compacting the upper surface and the lower surface of the raft plate; 3) planting bars on the poured structural beam and the shear wall; 4) constructing floor surface elevation control points on the backfill soil; 5) installing a plane reinforcing mesh on the backfill soil and the structural beam part; 6) and pouring structural slab concrete.

Fig. 1 is a schematic view of a structure of a layer of concrete structural slab and lower backfill soil according to an embodiment of the present invention, and fig. 2 is a schematic view of a construction perspective view of a layer of structural slab according to an embodiment of the present invention. The invention discloses a construction method of a basement backfill soil layer structure floor slab, which is characterized in that after construction is finished according to an original design drawing, the upper top surface of a structural concrete slab is flush with the upper top surface of a structural beam, namely the concrete structural slab is in the structural beam, and the concrete structural slab is stressed to act on the lower backfill, and comprises the following steps:

a. and (5) constructing according to the new design, and moving the originally designed structural beam downwards. Fig. 3 is a schematic diagram of a structural plate and a structure having the same height according to an embodiment of the present invention.

b. The structure beam moves down the height and is the structure board thickness, ensures that the structure board face standard height is unchangeable, satisfies the clear height requirement, and the structure board should act on the structure beam during construction.

c. The connecting part of the structural slab and the beam and the connecting part of the structural slab and the wall are respectively embedded with the steel bars.

And (3) embedding steel bars at the connecting part of the structural beam and the shear wall of the structural slab, wherein the specification model of the steel bars is HRB400E phi 18, the distance between the steel bars is 200mm, and the length of the exposed steel bars is not less than 4/5 of the thickness of the floor slab. Fig. 4 is a schematic view of the connection portion between the structural slab and the beam and the wall of the embodiment of the invention.

d. The space between the plate surface control points is set according to 1200mm intervals, the height is controlled according to the plate surface elevation of the concrete structure, the elevation control points are made of concrete, and the strength is not lower than C20.

e. And planar reinforcing mesh sheets are arranged on the backfill soil and the structural beam.

f. And pouring structural slab concrete.

The invention discloses a construction method of a basement backfill soil layer structure floor slab, which comprises the following steps:

1. requirement for downward movement of structural beams

The structure beam moves downwards on the basis of the original design, the original frame beam moves downwards according to the elevation of the plate surface, the downward movement height is the thickness of the structure plate at the position, and the condition that the downward movement height of the structure beam cannot be too large when the subsequent structure plate is stressed to act on the structure beam is ensured.

2. Quality requirement of bar planting

The shear wall and the structural beam are embedded with the steel bars, so that the structural plate, the shear wall and the structural beam are reliably connected to form a whole. The specification and model of the steel bars, the anchoring length and the exposed length must be strictly required. The reinforcing mesh sheets on the plate surface are bound and connected with the embedded reinforcing bars of the wall and the beam to form a whole.

3. Control of elevation of structural slab face after backfilling

The construction of the structural slab concrete is carried out after the backfilling construction and the bar planting are finished, and because pits are uneven on the soil surface after the backfilling, an elevation control point must be arranged at every 1-2 m distance to ensure the elevation of the slab concrete.

4. Quality requirement of plate surface reinforcing steel mesh

The structural slab is of a concrete structure and acts on a backfill soil surface and a structural beam, and the backfill soil is easy to settle due to overlong time, rising of underground water and the like, so that the concrete structural slab is required to be constructed according to the construction requirements of floor slabs, a reinforcing mesh is arranged in the structural slab, and the setting standard of the reinforcing steel is not lower than that of a single-layer bidirectional phi [email protected] 200.

The construction method of the basement backfill soil layer structure floor slab has substantial characteristics and obvious technical progress, solves the problem of slab surface cracks caused by unbalanced subsequent backfill settlement by improving the construction process of the structure beam slab structure, and greatly improves the construction period efficiency of backfill soil and the construction floor slab and the quality and quantity guarantee progress.

The construction method of the basement backfill soil layer structure floor slab is applied to tung catalpa homeland project engineering in tung cities, has obvious effect and is fully determined by construction units and supervision units.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.