CN209837478U

CN209837478U - Control device for steel bar protection layer of oversized concrete beam

Info

Publication number: CN209837478U
Application number: CN201920306467.7U
Authority: CN
Inventors: 沈小兵; 马松宝; 张华骞; 于国成
Original assignee: China 22MCC Group Corp Ltd
Current assignee: China 22MCC Group Corp Ltd
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2019-12-24
Anticipated expiration: 2029-03-12

Abstract

The utility model provides an ultra-large concrete beam protective layer controlling means, including the enough steel sheet that spanes the concrete beam of one, the steel sheet is put on two above cushions, vertical fixed muscle of each rigid coupling in steel sheet both ends, install the horizontal fixed muscle of multilayer again on two vertical fixed muscle, horizontal fixed muscle diameter more than or equal to concrete beam owner muscle, every layer of horizontal fixed muscle interval is used for adorning one deck concrete owner muscle, this device provides the support for the steel bar installation, the reinforcing bar has the supporter according to the preface, bearing structure is even on the support, fine control reinforcing bar protective layer's fixed effect.

Description

Control device for steel bar protection layer of oversized concrete beam

Technical Field

The utility model relates to a super large concrete beam protective layer control method specifically is to place a stirrup of compriseing steel sheet and reinforcement welding in advance when super large concrete beam multilayer reinforcing bar is installed.

Background

At present, when a large-span beam multi-layer steel bar is installed, protective layer steel bars are firstly placed on cushion blocks, the cushion blocks are used for supporting the steel bars to be at a certain height, and after the steel bars are placed, the multi-layer steel bar is fixed by utilizing binding wires. When the super large concrete beam construction, each layer reinforcing bar can't guarantee the parallel mount, consequently, the level is just inhomogeneous, and tie up the rolling method in addition and be operated by workman's manual, the inhomogeneous phenomenon of height is very general to long-time work, operating personnel physical demands is big, and later stage reinforcing bar rigidity is more difficult more. Therefore, the space between the steel bar protection layers in the prior art cannot be guaranteed to be uniform, the steel bars which are supposed to be positioned on the upper layer often happen, and the individual positions fall down to the lower layer, so that the steel bars are not uniformly arranged, and the construction quality is influenced.

The material of cushion generally adopts marble or concrete material, because longspan beam reinforcing bar gravity is big, causes the cushion crushing easily, leads to the reinforcing bar directly to fall on the template, then can come out the not enough phenomenon of protective layer when concrete placement. The mode of reinforcing bar ligature fixed multilayer reinforcing bar is through constructor experience, site operation ability decision to the control of upper and lower interlamellar interval, and when reinforcing bar gravity was big, because physical power is limited, often can not protect the reinforcing bar and can mention accurate height, all probably produces the slip in the ligature or after the ligature.

The defects in the prior art are combined as follows: 1) the cushion blocks used in the existing places are all marble or concrete cushion blocks, and due to the fact that the gravity of the long-span beam steel bars is large, the cushion blocks are easy to crush, and the phenomenon of rib leakage or insufficient protective layers occurs. 2) The fixed position is inaccurate, and this layer and upper and lower floor's reinforcing bar can not effectual cutting apart, causes the reinforcing bar to stack easily, leads to the unable effective flow of concrete placement in-process, appears leaking and shakes. 3) The time and labor are wasted, the installation position of the steel bar is inaccurate, and the danger of workers is high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is the defect that the time interval is difficult to control during concrete beam reinforcing bar arranges among the prior art.

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

the utility model provides an oversized concrete beam reinforcing bar protective layer controlling means, includes the steel sheet that a enough spaned concrete beam, and the steel sheet is put on two above cushion, and vertical fixed muscle of each rigid coupling in steel sheet both ends installs the horizontal fixed muscle of multilayer again on two vertical fixed muscle, and horizontal fixed muscle diameter more than or equal to concrete beam owner muscle, every layer of horizontal fixed muscle interval is used for adorning a layer of concrete owner muscle.

This device provides the support for the reinforcing bar installation, and the reinforcing bar has the supporter according to the preface, and bearing structure is even on the support, the fixed effect of fine control reinforcing bar protective layer.

Drawings

FIG. 1 is a view showing a structure of a control device;

FIG. 2 is a side view of the present apparatus;

fig. 3 is a state diagram of the control device.

In the figure, a cushion block 1, a steel plate 2, a transverse fixing rib 3, a vertical fixing rib 4 and a main rib 5.

Detailed Description

The following is a detailed description of the technical solution of the present invention:

the control device for the steel bar protection layer of the oversized concrete beam comprises a steel plate 2 which is enough to stretch across the concrete beam, the steel plate 2 is placed on a plurality of cushion blocks 1, two ends of the steel plate 2 are fixedly connected with a vertical fixing bar 4 respectively, a plurality of layers of transverse fixing bars 3 are arranged on the two vertical fixing bars 4, the diameter of each transverse fixing bar 3 is larger than or equal to that of a main bar 5 of the concrete beam, and the distance between every two layers of transverse fixing bars 3 is used for installing one layer of main bars 5.

The device is described in detail below by way of an example of fabrication:

1. vertically controlling the steel bars: cutting 2 150mm long phi 25 steel bars

2. Horizontal control reinforcing steel bars: cutting 2 long steel bars (the diameter of the steel bar is larger than or equal to the diameter of the main bar of the beam, so as to ensure that the distance between the upper and lower steel bars is larger than the diameter of the main bar and meet the standard requirement)

3. Steel plate (c): cutting 100mm 600mm (beam width minus protective layer 2) sigma 10 thick steel plate

4. And welding the first and the third plates, wherein the welding position is that the diameter of the main rib is inward from two sides of each plate.

5. First and second do not require welding. The steel bar can be fixed by the dead weight of the steel bar.

Combine above-mentioned device the utility model provides an oversized concrete beam reinforcing bar protective layer control method, the operating procedure is:

1) a bottom die is required to be paved before the steel bars are installed;

2) placing a plurality of groups of cushion blocks 1 on the bottom die in the width direction of the concrete beam;

3) placing a steel plate 2 with the length enough to span the width of the beam on each group of cushion blocks 1, wherein two ends of the steel plate 2 are fixedly connected with vertical fixing ribs 4;

4) arranging a main reinforcement 5 of a first layer of concrete on each steel plate 2 longitudinally;

5) a first transverse fixing rib 3 is transversely arranged on the vertical fixing rib 4, and the transverse fixing rib 3 is pressed on the first layer of main ribs 5;

6) a second layer of main ribs 5 are longitudinally arranged on each transverse fixing rib 3;

7) and a second transverse fixing rib 3 is arranged and pressed on the second layer of main rib 5, and by analogy, the transverse fixing ribs 3 and the main ribs 5 are staggered and accumulated layer by layer until the number of layers required by the main ribs is reached.

The utility model discloses the cushion that plays the supporting role below the steel sheet can be two, three or four, do not need too, and the cushion passes through steel sheet support upper main muscle, and weight on the steel sheet is shared by each cushion each other, and the steel sheet is separated for the face with the cushion, compares in prior art with main muscle directly take on the cushion, has solved stress concentration's problem.

When this method is applied, the following steps are followed:

1. before the reinforcing steel bars are installed, a corresponding number of fixers are made in advance according to the span of the beam.

2. After the bottom die is laid, the bottom of the fixer is intensively placed on the cushion block, and then the fixer is placed on the upper portion of the bottom die.

3. After the first layer of reinforcing steel bars are placed in a staggered mode and the vertical fixed reinforcing steel bars are placed, the transverse fixed reinforcing steel bars (the reinforcing steel bars are equal to or larger than the diameter of the main reinforcing steel bars) are placed, and then the second layer of reinforcing steel bars are installed.

4. By analogy, the third layer of steel bars can be installed.

The transverse fixing ribs and the vertical fixing ribs can be welded or not welded. Can press close to vertical fixed muscle when horizontal fixed muscle is installed and place, generally can not the shift position after the multilayer compaction.

The utility model discloses a useful effective: 1. the fixer is made of easily available materials, and is simple to manufacture and install. Through steel sheet and cushion contact, can avoid the stress concentration of reinforcing bar to cause the damage to the cushion, avoided the not enough or end iron of protective layer to leak the muscle. Utilize the vertical and horizontal reinforcing bar of fixer to effectively cut apart the end iron, the mounted position is accurate, the concrete pouring in-process, and the effectual every position that reachs in gap that the concrete accessible cut apart comes, and the effect of vibrating is closely knit.

Claims

1. The utility model provides an ultra large concrete beam steel reinforcement protective layer controlling means, characterized by: the concrete beam comprises a steel plate which is enough to stretch across a concrete beam, the steel plate is placed on more than two cushion blocks, two ends of the steel plate are fixedly connected with a vertical fixing rib respectively, a plurality of layers of transverse fixing ribs are installed on the two vertical fixing ribs, the diameter of each transverse fixing rib is larger than or equal to that of a main concrete beam rib, and the distance between every two layers of transverse fixing ribs is used for installing one layer of main concrete ribs.