CN114525930A - Construction method for reinforcing external corner of cantilever plate - Google Patents

Abstract

The invention discloses a construction method for reinforcing bars of an external corner of a cantilever plate, which comprises the following steps: step 1: supporting a formwork for the cantilever plate; and 2, step: laying short-direction reinforcing steel bars of the external corner epithelia; and 3, step 3: laying long-direction reinforcing steel bars with the external corner epithelium vertical to the short-direction reinforcing steel bars; and 4, step 4: binding a bidirectional steel bar at the intersection point; and 5: determining the thickness of the concrete protective layer of the long-direction steel bar according to different environmental categories; step 6: and (5) pouring concrete. The construction method of the invention has simple and clear structure; the construction is easy, and the calculation of the steel bar quantity is simple; the concrete protective layer of the negative reinforcement cannot be enlarged due to the radiation reinforcement; when no plate is arranged in the corner chamber, the negative rib can be anchored into the side beam; the radial ribs are cancelled, the configuration range of the bidirectional distribution ribs is reduced, the configuration range of the bidirectional negative ribs is extended to the outer edge of the cantilever plate, and the length type of the negative ribs cannot be increased; the stress rib is allowed to be lapped, and when the cantilever plate is large in cantilever length, the bidirectional negative rib can be also lapped in a staggered mode.

Description

Construction Method of Reinforcing Reinforcement at the Sun Angle of the Cantilevered Slab

technical field

The invention relates to the technical field of building construction, in particular to a construction method for reinforcing bars at the positive angle of a cantilever plate.

Background technique

The existing construction method of reinforcing bars at the outer corners of cantilevered slabs requires radial bars, the structure is more complicated, and it is not easy to mark.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a construction method for reinforcing reinforcement at the outer corner of a cantilevered slab, which is based on the principle that the reinforcement amount of the two-way negative reinforcement at the outer corner of the overhanging slab will not be greater than the negative reinforcement of the pure cantilever slab in the same direction. The distribution of the two-way negative reinforcement is to extend the two-way negative reinforcement to the outer edge of the cantilever plate.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

The invention provides a preparation method for a construction method for reinforcing bars at the outside corner of a cantilevered slab, which is characterized in that the method comprises the following steps:

Step 1: Support formwork for the cantilever plate;

Step 2: Lay the short-direction steel bars of the epithelium of the outer corner;

Step 3: Lay the long-direction steel bar perpendicular to the short-direction steel bar;

Step 4: Bind the two-way steel bars at the intersection;

Step 5: Determine the thickness of the concrete protective layer of the longitudinal reinforcement according to the different environmental categories;

Step 6: Pour the concrete.

Further, when the thickness of the cantilever plate is greater than 150, add bench ribs.

The beneficial effects of the present invention are:

1. There are no radial ribs, and the structure is simple and clear;

2. It is easy to mark, because there are no radial bars, the drawing method is simple, and there is no positioning size of the two-way middle bar spacing;

3. Negative bars are equidistant and of equal length, which is easy to construct, and it is also very simple to calculate the amount of steel bars;

4. The concrete protective layer of the negative reinforcement will not be enlarged due to the radial reinforcement;

5. When there is no plate in the corner room, the negative reinforcement can be anchored into the side beam;

6. The radial bars are cancelled, the configuration range of the bidirectional distribution bars is reduced, and the arrangement range of the bidirectional negative bars is extended to the outer edge of the cantilever plate, without increasing the length type of negative bars.

7. Although the negative reinforcement of the two-way cantilever plate (that is, at the outer corner of the cantilever plate) is lapped by the anchoring agent in the tension zone of the pure cantilever plate end, the lapped reinforcement is allowed. At the same time, the two-way negative reinforcement can also be dislocated and overlapped.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

FIG. 1 is a structural diagram of reinforcing bars at the outer corner of a cantilever plate provided by the present invention.

Description of reference numerals: 1. Steel bars distributed in the x-direction of the upper skin; 2. The stress-bearing steel bars in the x-direction of the upper skin; 3. The y-direction stressed steel bars on the upper skin; , across the inner plate; 7, plate support.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figure 1, the preparation method of the construction method for the reinforcement of the cantilevered plate at the positive angle includes the following steps:

Step 1: Support formwork for the cantilever plate;

Step 2: Lay the lesser of the reinforcement bar 2 in the x-direction of the upper skin and the reinforcement bar 3 in the y-direction of the upper surface of the upper skin;

Step 3: Lay the outer corner epithelium and the short-direction steel bar perpendicular to the short-direction steel bar, whichever is greater;

Step 4: Bind the two-way steel bars at the intersection;

Step 5: If the overhanging board is thick (thickness>150), the bench reinforcement should be added;

Step 6: Determine the thickness of the concrete protective layer of the longitudinal reinforcement according to the different environmental categories; (For the thickness of the concrete protective layer, please refer to Table 8.2.1 of "Code for Design of Concrete Structures" GB50010-2010 (2015 Edition))

Step 7: Pour the concrete.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (2)

1. The construction method for reinforcing the external corner of the cantilever slab is characterized by comprising the following steps:

step 1: supporting a formwork for the cantilever plate;

step 2: laying short-direction reinforcing steel bars of the external corner epithelium;

and step 3: laying long-direction reinforcing steel bars with the external corner epithelium vertical to the short-direction reinforcing steel bars;

and 4, step 4: binding a bidirectional steel bar at the intersection point;

and 5: determining the thickness of the concrete protective layer of the long-direction steel bar according to different environmental categories;

step 6: and (5) pouring concrete.

2. The cantilever plate external corner reinforcement construction method according to claim 1, wherein when the cantilever plate thickness is larger than 150, stool ribs are added.

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