JPH0699938B2 - Reinforcement frame and underground beam construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing frame and an underground beam driving method used for forming an underground beam in a civil engineering and construction site.

[0002]

2. Description of the Related Art A conventional underground beam driving method has the following steps. Floor excavation (requires overburden) Disposal of residual soil (requires disposal of surplus soil for residual excavation) Kuriishi Geotechnical (requires Kuriishi geotechnical to be included in the dugout) Reinforced scaffolding assembly (column reinforcement) (Required for fixing) Reinforcing bar assembly Formwork assembly Concrete placing Removing reinforcing bar scaffolding Removing formwork (prone to break out of concrete) Backfilling (refilling with soil)

The conventional underground beam driving method has the following drawbacks. The process is long and complicated. Most of the remaining soil is disposed of, and the soil is required. A considerable amount of time is required for formwork and reinforcing bar work. Since the work is done below the surface of the ground, the reinforcing steel is easily soiled with soil. Since there are many human manual tasks, work efficiency is poor and labor costs are high. Poor workability when using various civil engineering work machines. The overall construction period is very long.

[0004]

The problems to be solved by the present invention include a simple process, a very short construction period, various civil engineering work machines can be used extensively, and workability is good. It is an object to provide a method of placing a rebar frame and an underground beam, which is unnecessary and requires no formwork construction, and there is no fear of quality deterioration.

[0005]

Means for Solving the Problems The gist of the present invention, which has solved the above problems, is to provide a U-shaped section along a position slightly away from the inner peripheral surface of a concrete block having a U-shaped cross section and having a predetermined length. A plurality of bent reinforcing bars are arranged at predetermined intervals in the longitudinal direction of the concrete block, and each reinforcing bar is locked to the inner peripheral surface. After performing a predetermined foundation work on the bottom surface of the groove for the underground beam, the bar arrangement frames according to claim 1 are arranged in series along the longitudinal direction of the groove for the underground beam. , Next, backfill the outside of the same reinforcement frame with earth and sand, etc., fix other reinforcements to the reinforcements in the reinforcement frame, and perform the required reinforcement work, and the internal space of the reinforcement frame It is a method of placing underground beams, which is characterized by forming concrete beams after placing concrete on them and then solidifying them.

[0006]

The reinforcing frame of the present invention is a concrete block having a U-shaped cross section and having a predetermined length, and an appropriate number of the blocks are arranged in series according to the length of the place where the underground beam is to be formed. To use. At a position slightly distant from the inner peripheral surface of the concrete block, a plurality of reinforcing bars bent in a U shape are arranged and locked at predetermined intervals,
Reinforcing work is performed by locking other reinforcing bars to the same reinforcing bar.

The internal space of the concrete block is a space for placing concrete and is a main part of the underground beam. In addition, the concrete block is used for civil works such as gas, water,
It can also be used as a pipe protection beam for plumbing works such as dirty water.

In the underground beam driving method of the present invention, the previously-arranged rebar frames are arranged in series on the bottom surface of the underground beam groove after the foundation work is placed. Next, the outside of the same reinforcement frame is backfilled with earth and sand, etc., and another reinforcement material is locked to the reinforcement material in the reinforcement frame to perform reinforcement work. The rebar frame serves as a concrete formwork, and the rebar material pre-locked on the inner surface of the rebar frame plays a role of holding other rebar materials during the rebar construction work. . After finishing the reinforcement work in the same reinforcement frame, after placing concrete in the internal space of the same reinforcement frame,
Solidify to form an underground beam.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway sectional view showing an embodiment of a reinforcing bar, FIG. 2 is a cutaway side view of the same portion, FIG. 3 is a process explanatory view showing an embodiment of an underground beam driving method, and FIG. 5 is a partially cutaway sectional view showing the same part, FIG. 5 is a partially cutaway sectional view showing the same part, and FIG. 7 is a partially cutaway vertical sectional view showing another embodiment.

In the reinforcing bar frame 1 of this embodiment, the inner peripheral surface 3 of a concrete block 2 having a U-shaped cross section and having a predetermined length.
A plurality of reinforcing bars 4 bent in a U shape along a position slightly apart from are arranged at predetermined intervals in the longitudinal direction of the concrete block 2, and each reinforcing bar 4 is locked to the inner peripheral surface 3. ing. In the underground beam driving method of the present embodiment, the stones 8 are provided on the bottom surface 7 of the trench 6 for the underground beam provided by excavating the ground surface 5.
After placing the waste concrete 9 into the
The above-mentioned bar arrangement frames 1 are arranged in series along the longitudinal direction of the.

Next, the outer side 10 of the reinforcing bar 1 is backfilled with earth and sand or the like, and the reinforcing bar 4 in the reinforcing bar 1 is provided with main bars 11, reinforcing bars 12,
A predetermined reinforcing work is performed by locking another reinforcing bar material such as the purse bar 13. At this time, plumbing work for the water pipe 14, the gas pipe 15 and the like can be performed. The direction of piping is perpendicular to the reinforcing frame 1. A clip may be used to bind the reinforcing bars together to simplify the work. Then, concrete 17 is poured into the internal space 16 of the reinforcing bar 1 and then solidified to form an underground beam 18.

The underground beam driving construction method using the reinforcing bar frame 1 of this embodiment has many improvements as compared with the conventional construction method. Since the trench 6 for the underground beam is of a minimum size, it is possible to perform work just near the boundary, and there is little disposal of residual soil, so no soil is required. Since there is no need for rebar scaffolding or formwork, the process is simple and the construction period can be greatly shortened. Since various civil engineering machines can be used, work efficiency is good and labor costs can be reduced. Since there are many operations above the ground surface 5, high quality can be maintained and
Highly safe. Since the curing of concrete is curing in the soil, it can be completely cured. Since no formwork is required, there is no concrete loss when removing the formwork. High quality can be obtained because the rebar does not directly contact the soil. It is also possible to place the underground beam 18 and the soil floor 19 at the same time,
It is convenient because it can be set separately.

FIG. 7 shows another embodiment. In this example, the reinforcing bar frame 1 is used as a pipe protection beam for a pipe 21 that crosses the asphalt pavement 20. It can be widely applied in the field of plumbing such as gas, water and sewage.

[0014]

EFFECTS OF THE INVENTION According to the present invention, with a simple process, the construction period is extremely short, various civil engineering work machines can be used extensively, workability is good, less waste soil is disposed of, less soil is required, and formwork is not required. It is possible to provide a method for placing a reinforcing bar and an underground beam without fear of quality deterioration.

[Brief description of drawings]

FIG. 1 is a partially cutaway cross section showing an embodiment of a reinforcing bar frame.

FIG. 2 is a partially cutaway side view showing an embodiment of a reinforcing bar frame.

FIG. 3 is a process explanatory view showing an example of an underground beam driving method.

FIG. 4 is a partially cutaway sectional view showing a construction state.

FIG. 5 is a partially cutaway sectional view showing a construction state.

FIG. 6 is a partially cutaway plan view showing a construction state.

FIG. 7 is a partially cutaway vertical sectional view showing another embodiment.

[Explanation of symbols]

 1 Reinforcing Frame 2 Concrete Block 3 Inner Surface 4 Reinforcing Bar Material 5 Ground Surface 6 Groove for Underground Beam 7 Bottom 8 Kuriishi 9 Waste Concrete 10 Outside 11 Main Bar 12 Reinforcing Bar 13 Purse Bar 14 Water Pipe 15 Gas Pipe 16 Internal Space 17 Concrete 18 Underground beam 19 Dirt 20 Asphalt pavement 21 Piping

Claims (2)

[Claims] 1. A reinforcing bar material bent in a U shape along a position slightly away from an inner peripheral surface of a concrete block having a U-shaped cross section and having a predetermined length is provided in the longitudinal direction of the concrete block. A rebar frame characterized in that a plurality of bar bars are arranged at predetermined intervals, and the same rebar members are locked to the same inner peripheral surface. 2. The reinforcing frame according to claim 1, wherein after a predetermined foundation work is performed on the bottom surface of the trench for underground beam provided by excavating the ground surface, the trench is laid along the longitudinal direction of the trench for underground beam. Are placed in series and then placed back on the outside of the same rebar frame with earth and sand, etc., and other rebar members are locked to the rebar members in the rebar frame to perform the required rebar construction work. Then, a method of placing an underground beam, which comprises placing concrete in the inner space of the reinforcing frame and then solidifying it to form an underground beam.