JPH10280414A - Banking construction method in which light weight air bubbling concrete is used - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form banking which has proper weight and strength precisely in a short period of time by accumulating light weight air bubbling concrete blocks manufactured to predetermined bulk density on a face of slope which is digged like stairs by filling filler and placing concrete by using curbs as mold frame. SOLUTION: A light weight air bubbling concrete block 1 having bulk density of 0.3 to 1.2 t/m<3> is manufactured at a factory. A hillside 2 is digged to form stepped parts 3a to 3d on a face of slope 3 per proper height, sand and crushed stones 4 are spread on the stepped parts 3a to 3c to make the ground uniform, and the blocks 1 are piled up at two or three steps by filling gravel, sand, and filler 5 such as pelletlike synthetic resin into a clearance between the face of slope 3 and them. Next, sand and crushed stones 4 are spread on a top face of the blocks 1 which are piled up to a height of the stepped part 3d and a step floor 6, curbs 7 are arranged at a side end thereof, and concrete is placed by using the curb 7 as mold frame to form the step floor 6. A plate member 8 such as a decorative plate is added to the block 1 on the outermost side as required.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embankment method using lightweight cellular concrete.

[0002]

2. Description of the Related Art Conventionally, when a road or the like is formed by embankment on soft ground, the weight of earth and sand usually used is 1.2 to 1.
There was a problem that the ground subsided because it was as heavy as about 8 t / m ³ .

In order to solve this problem, a technique using a styrofoam block (EPS method) has recently been provided. Styrofoam block weighs 0.016 ~
Since it is as light as about 0.029 t / m ³ , the amount of settlement can be significantly reduced as compared with ordinary earth and sand.

However, since the Styrofoam block is lightweight, there is a possibility that the Styrofoam block during construction may be blown off by strong wind. In addition, since the Styrofoam block is lightweight and impervious, when the water level rises due to rain at the construction site, there is a possibility that very large buoyancy will act and it will be lifted. Need to be kept. Furthermore, since styrofoam blocks are inferior in solvent resistance and fire resistance, special attention must be paid to welding work on styrofoam blocks.

On the other hand, in addition to the above-described EPS method, a method of casting lightweight cellular concrete on site (FCB method) has been developed. This method is a method of producing a lightweight embankment material by mixing foamed bubbles in a slurry-like mortar. According to this method, the filling material has good initial fluidity, so that it can be filled in a narrow place, and after hardening, is excellent in strength, solvent resistance, and fire resistance.

However, according to this construction method, the embankment material is not self-supporting due to its good fluidity, and cannot be cast unless a formwork is formed on the site. If the accuracy of setting the formwork is poor, the slurry leaks out, and the leaked slurry not only deteriorates the formwork surface but also impairs the appearance,
This will adversely affect the dimensional accuracy after curing. For that purpose, a formwork with high installation accuracy is required, and it is technically very difficult to build such a formwork on site.

[0007] In the FCB method, the height of the casting at one time is about 50 to 60 cm. for that reason,
When the embankment height is high, the second layer must be cast after the necessary strength of the first layer cast portion (strength that can withstand the weight of the second layer) is generated. Since the process must be repeated until a predetermined height is reached, the construction efficiency is reduced.

Further, since the slurry is kneaded, poured, cured and hardened at a construction site, if the quality control in each step is not sufficiently performed, there is a possibility that the strength may be reduced or collapsed. In addition, the quality of cement used as a material may be extremely deteriorated due to weather, temperature, and the like. Under such circumstances, it is necessary to have a high level of skill and labor to produce a lightweight aerated concrete as designed by sufficiently performing quality control in each process such as material management, kneading, casting, and curing.

[0009]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an embankment method using lightweight cellular concrete in which required weight, strength and the like can be obtained with high accuracy and the construction time can be reduced. .

[0010]

The embankment method using lightweight cellular concrete according to the present invention is characterized in that lightweight cellular concrete blocks are manufactured in a factory, and the lightweight cellular concrete blocks are piled up on site to perform embankment. And

According to the embankment method using lightweight concrete of the present invention, a lightweight aerated concrete block obtained by performing quality control in each process such as material management, kneading, casting and curing at a factory is transferred to a site. Embankment is carried out by transporting and stacking them on site.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The bulk density of a lightweight cellular concrete block is 0.3 to 0.3% in order to secure general embankment strength.
The range of 0.45 t / m ³ is sufficient, but when strength is particularly required, the range is set to 0.45 to 1.2 t / m ³ .

The size of the lightweight cellular concrete block can be arbitrarily set depending on the construction mode.
If necessary, a block having an appropriate size and shape can be obtained by cutting it with a saw or the like on site.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A lightweight aerated concrete block is formed by kneading raw materials such as silica stone, quicklime and cement and water, pouring a slurry obtained by adding aluminum powder into a mold having an appropriate size, and forming a semi-cured material. It is obtained by removing the mold in the state and performing autoclave curing.

FIG. 1 shows a state where a road is constructed by stacking the lightweight cellular concrete blocks 1 thus obtained.

In this road construction, the abdomen of the mountain 2 or the like is cut off, and a plurality of steps 3a, 3b,
3c and 3d are formed.

Then, sand,
The ground is leveled by laying crushed stones 4 and the like, and the lightweight cellular concrete blocks 1 are stacked in two or three steps thereon. The gap between the lightweight cellular concrete block 1 and the slope 3 generated at this time is filled with a filler 5 such as gravel, sand, or pellet-like synthetic resin.

Next, on the upper step 3b and the uppermost surface of the lightweight cellular concrete block 1, the same sand,
The crushed stones 4 are laid, and the lightweight cellular concrete blocks 1 are stacked on the crushed stones 4 in the same manner as described above. Then, in the same manner as described above, the gap between the lightweight cellular concrete block 1 and the slope 3 is filled with a filler 5 such as gravel, sand, or a pellet-like synthetic resin.

Next, on the upper step 3c and the uppermost surface of the lightweight cellular concrete block 1, the same sand,
The crushed stones 4 are laid, and the lightweight cellular concrete blocks 1 are stacked on the crushed stones 4 in the same manner as described above. Then, in the same manner as described above, the gap between the lightweight cellular concrete block 1 and the slope 3 is filled with a filler 5 such as gravel, sand, or a pellet-like synthetic resin.

Next, the upper step 3d and the subgrade 6
Lightweight cellular concrete block 1 stacked up to the height
The same sand, crushed stones 4 and the like as described above are laid on the upper surface, and a curb 7 is arranged at the side end thereof. Concrete is cast using the curb 7 as a formwork to form a subgrade 6.

A plate member 8 such as a decorative board is attached to the outermost block of each of the stacked lightweight cellular concrete blocks 1 as necessary.

In the above embodiment, sand, broken stones 4 and the like are laid every several steps of the lightweight cellular concrete block 1 to adjust the height and level the ground for the lightweight cellular concrete block 1 to be stacked thereon. But these sands,
The broken stone 4 is not always necessary.

[0023]

As described above, according to the embankment method using the lightweight cellular concrete according to the present invention, since the lightweight cellular concrete block is used, the block is not blown by the strong wind, and the work is carried by transporting the block. Not too heavy to do. In addition, the amount of settlement can be significantly reduced, and can sufficiently fulfill the role of a lightweight embankment.

Further, since the lightweight cellular concrete block to be used is manufactured at a factory, the weight, water absorption and the like can be set to desired values, and a block of uniform quality can be obtained.

In addition, since there is no need to adjust, knead, cast, cure, etc. the concrete material at the time of construction, the construction can be shortened and the height which can be constructed at one time is not limited.

Furthermore, since cutting can be easily performed by a saw or the like, dimensional adjustment on site is also easy.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an embankment method using lightweight cellular concrete according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lightweight cellular concrete block 3 Slope 3a, 3b, 3c, 3d Step part 4 Sand, crushed stone 5 Filling material 6 Subgrade 7 Curb 8 Plate material

Claims (2)

[Claims] 1. An embankment method using lightweight cellular concrete, wherein a lightweight cellular concrete block is manufactured at a factory, and the lightweight cellular concrete blocks are piled up on site to perform embankment. 2. The embankment method using lightweight cellular concrete according to claim 1, wherein a lightweight cellular concrete block having a bulk density of 0.3 to 1.2 t / m ³ is used.