JPH0367166B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for constructing underground beams that simplifies reinforcement work on site.

[Problem that the invention seeks to solve]

In the construction of underground beams, reinforcing bars such as crossbars and main bars are generally assembled on site, but this reinforcement work requires a large number of steps, which reduces the efficiency of on-site work. In contrast, a method has been proposed in which reinforcing bars, etc. are assembled in a mesh shape in a factory and then joined on site, but this method requires only reinforcement work to be carried out before pouring concrete, resulting in a large number of joints. , also requires a means to hold the meshwork muscles.

This invention was made for the purpose of easily constructing underground beams while reliably fixing reinforcing bars.By pouring concrete at each joint of mesh bars, reinforcing bars can be assembled reliably and easily. This is what we are trying to do.

[Means for solving problems]

In the present invention, the construction procedure is divided into three stages according to the parts where the beam reinforcing bars are assembled, and in each stage, the reinforcing bars are assembled and concrete is placed to form the underground beam including the foundation slab.

The ribs and core bars of the beam reinforcing bars are assembled in advance in the form of a mesh, and after they are installed at predetermined positions and concrete is poured, they are vertically connected to each other.

In the first step, assemble the lower muscles, trumpet muscles, and costal muscles,
At the same time, the foundation slab will be reinforced and concrete will be poured to form the foundation slab.

In the second stage, the core reinforcement and rib reinforcement that were fixed in the concrete in the first stage are followed by further core reinforcement and rib reinforcement, and concrete is poured, and in the third stage, the upper reinforcement,
Covering reinforcements and slab reinforcements are placed and concrete is placed to form the floor slab.

〔Example〕

The present invention will be described below with reference to drawings showing one embodiment.

In the present invention, the underground beam A is constructed in three stages, and in each stage, reinforcing bars are installed and assembled, and then concrete is poured to construct the underground beam A.

First, the first invention will be explained based on FIGS. 1 and 2.

This invention is a method of constructing an underground underground beam A on the outer periphery,
In one step, lower reinforcement 1, cost reinforcement mesh _2-1 , and core reinforcement mesh _3-1 are laid out and placed to form concrete 4.
- ₁ , and in the second step further rib mesh _2-2 ,
Concrete 4 by erecting core mesh _3-2
− ₂ , and in three stages the upper reinforcement 5 and the cover reinforcement 6,
The process consists of arranging slab reinforcement and pouring concrete _4-3 .

The construction procedure will be explained step by step in detail with reference to FIG. 1 below.

In the first step (), first, reinforcing bar spacers 8 are placed on both sides of the head of the pile 7, and the rib mesh _2-1 , which has been assembled in a mesh shape in advance on the reinforcing bar spacers 8 and bent into an L shape, is attached to the pile 7. It is placed in the direction of the beam on both sides of the pile reinforcements 9 that extend upward. Next, the lower end reinforcement 1-1 of the lower reinforcement ₁ is placed and pressed onto the horizontal part of the rib mesh _2-1 , creating an L-shaped core reinforcement that is arranged in a mesh shape like the rib mesh _2-1 . The mesh _3-1 is placed inside and parallel to the rib mesh _2-1 . Next, place the cross reinforcement _10-1 on the lower end reinforcement _1-1 ,
Arrange reinforcement perpendicularly to this, and place upper end reinforcement 1 of lower reinforcement 1 on top of it.
- After reinforcing and pressing ₂ , place reinforcement for foundation slab B, and pour concrete _4-1 onto foundation slab B. At this time, the upper portions of the rib mesh _2-1 and the core mesh _3-1 protrude from the base slab B.

In the second stage (), the lower part of the rib mesh _2-1 is buried in the foundation slab B for the first time, and the rib mesh 2-1, which has a height up to the upper part of the underground beam A by attaching joints to the core mesh _3-1 , is constructed. ₂ , Core muscle mesh _3-2
Build. At this time, the rib muscle mesh _2-2 and the core muscle mesh _3-2 are held by the mesh muscle retainer 11. Next, the beam formwork 12 and the floor formwork 13 are assembled, and concrete _4-2 is poured up to the tips of the rib meshes _2-2 and core meshes _3-2 .

In the third stage (), first the upper muscle uke 14 and the cross muscle 10
₋₃ to costal muscle mesh _2-2 , core muscle mesh _3-2
Weld two steps vertically to the beam on the horizontal bar at the tip.
The lower end reinforcement 5-1 and the upper end reinforcement _5-2 of the upper reinforcement 5 are arranged and pressed onto each of the upper reinforcement supports ₁₄ and the cross reinforcement _10-3 , respectively. Next, the covering reinforcing bars 6 are mounted on the top reinforcing bars _5-2 of the upper reinforcing bars 5 in a direction perpendicular to the beam, and after the reinforcement of the floor slab is arranged, concrete is poured.

Figure 2 shows the arrangement of various reinforcing bars.

The construction work of underground beam A is completed through the above steps.

Next, the second invention will be explained based on FIGS. 3 and 4.

This invention is a method of constructing an internal underground beam A,
The construction procedure consists of three steps similar to the first invention.

The construction procedure will be explained with reference to FIG.

In the first step (), first, a reinforcing bar spacer 8 is installed on the head of the pile 7, and a rib mesh _2-1 formed in the shape of a bar is placed thereon in the direction of the beam. Next, place the lower end reinforcement 1-1 of the lower reinforcement ₁ on top of the rib mesh _2-1 .
The I-shaped core mesh _3-1 is placed inside the rib mesh _2-1 in the direction of the beam. Next, cross reinforcement _10-1 is placed perpendicular to bottom reinforcement _1-1 , and upper reinforcement _1-2 of bottom reinforcement 1 is placed on top of it.
After welding, reinforcement is placed for foundation slab B, and concrete _4-1 is poured to form foundation slab B.
At this time as well, the upper portions of the rib mesh _2-1 and the core mesh _3-1 protrude from the base slab B.

In the second stage (), first, the rib mesh _2-1 , the core muscle mesh 3-1, which are fixed on the foundation slab B, and the rib mesh _2-2 and the core muscle mesh _3-2 are held by the _mesh retainer 11. While building. Next, the beam formwork 12 and the floor formwork 13 are assembled, and concrete _4-2 is poured up to the tips of the rib meshes _2-2 and core meshes _3-2 .

In the third stage (), first the upper muscle holder 14, the cross muscle 1
_0-3 to costal muscle mesh _2-2 , takata muscle mesh 3-
On the horizontal reinforcement at the tip of ₂ , the lower end reinforcement 5-1 and the upper end reinforcement _5-2 of the upper reinforcement 5 are placed on _each upper reinforcement holder 14 and the cross reinforcement _10-3, respectively. Pressure contact. Next, the cover reinforcement 6 is installed on the upper end reinforcement _5-2 in the vertical direction of the beam, and after assembling the slab reinforcement, concrete is poured to form the floor slab, and the work is completed.

Figure 4 shows the arrangement of reinforcing bars.

〔Effect of the invention〕

As described above, in this invention, concrete is poured for each mesh joint, so reinforcing bars can be assembled reliably and easily.
As a result, underground beams can be easily formed.

[Brief explanation of drawings]

FIGS. 1 and 2 show an embodiment of the first invention, with FIG. 1 being a sectional view showing the construction procedure, and FIG. 2 being a sectional view showing the reinforcement arrangement state. FIG. 3 and FIG. 4 show an embodiment of the second invention, and FIG. 3 is a sectional view showing the construction procedure, and FIG. 4 is a sectional view showing the reinforcement state. A...Underground beam, B...Foundation slab, 1...Bottom reinforcement, _1-1 ...Bottom reinforcement, _1-2 ...Top reinforcement, _2-1 ,
_2-2 ... Rib mesh, _3-1 , _3-2 ... Core mesh, _4-1 , _4-2 ... Concrete, 5
... Upper reinforcement, _5-1 ... Lower end reinforcement, 5- ₂ ... Upper end reinforcement,
6... Cover bar, 7... Pile, 8... Rebar spacer, 9... Pile bar, _10-1 , _10-3 ... Cross bar,
11...Mesh reinforcement, 12...Beam formwork, 13
...Floor formwork, 14...Upper reinforcement support.

Claims (1)

[Scope of Claims] 1. Reinforcing bar spacers are placed on both sides of the pile head, and on the reinforcing bar spacers, cost bar meshes are placed on both sides of the pile bars extending above the pile in the direction of the beam, and on the cost bar meshes. At the same time, the lower end reinforcement of the lower end reinforcement is arranged and pressed, and the core reinforcement mesh is placed in the beam direction inside the cost reinforcement mesh, and the cross reinforcement is placed on the lower end reinforcement and perpendicular to it. After arranging and pressing the upper end reinforcement onto the cross reinforcement, we placed reinforcement for the foundation slab and poured concrete to form the foundation slab, and then the rib mesh and core reinforcement mesh were already installed. Erection is carried out in succession to the rib mesh and core mesh, the beam formwork and floor formwork are assembled, and concrete is poured to the front of the tip of each mesh.Furthermore, upper reinforcement supports and cross reinforcements are placed perpendicular to the beam on each mesh. At the same time, the lower end reinforcement and upper end reinforcement of the upper reinforcement are arranged and pressed onto the upper reinforcement and cross reinforcement, respectively, and the cover reinforcement is installed on the upper reinforcement in the vertical direction of the beam to arrange the floor slab reinforcement. , An underground beam construction method that involves pouring concrete to form an underground beam. 2 Install a reinforcing bar spacer above the pile head, place the rib mesh on this reinforcing bar spacer in the direction of the beam,
At the same time, arrange and press the lower end reinforcement of the lower end reinforcement on the rib mesh, place the core reinforcement mesh inside the costar mesh in the beam direction, and arrange the cross reinforcement on the lower end reinforcement perpendicular to it. , place the upper end reinforcement of the lower reinforcement on the cross reinforcement.
After welding, we placed reinforcement for the foundation slab and
Concrete is poured to form a foundation slab, and then the cost reinforcement mesh and core reinforcement mesh are connected to the cost reinforcement mesh and core reinforcement mesh that have already been installed for erection, and the beam formwork and floor formwork are installed. Concrete is placed in front of the tip of each mesh, and upper reinforcement supports and cross reinforcements are attached to each mesh in the vertical direction of the beam, and the lower and upper reinforcements of the upper reinforcement are placed on these upper reinforcement supports and cross reinforcements, respectively. A construction method for underground beams in which reinforcement is placed and pressure welded, and cover reinforcements are installed perpendicularly to the beam on top of the upper reinforcement to arrange floor slab reinforcement, and concrete is poured to form an underground beam.