JPH10227003A - Construction of base course - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability by penetrating the slurry-type solidifying material from a surface of a banking so as to solidify the whole of the banking. SOLUTION: A banking layer 2 is formed at the same height with a base course 1 to be constructed without performing the soil compaction of the material such as the soil, which is generate in a construction field, or the low-cost material, in which concrete glass is mixed. Continuously, the slurry-type solidifying material 3 having excellent flowing ability such as mortar and concrete is spread over a surface of the banking layer 2 so as to be naturally penetrate through multiple spaces, which exist between soil grains. After the solidifying material 3 is hardened so as to form a base course 1, asphalt and concrete is placed on the base course 1. As a solidifying material 3, the soil generated in a construction field, slurry, or bentonite, which is generated at other construction field, clay, sludge of river, and the mixture of wasted member such as discharged mud from a factory and the consolidifying material such as cement is used at need. With this structure, construction period can be shortened, and while cost is lowered, and while generation of dust can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a temporary or permanent roadbed such as a road or a railway.

[0002]

2. Description of the Related Art Roadbeds such as roads and railways are constructed by the following steps. Laying earth and sand mixed with the required amount of aggregate grains at the site. As shown in FIG.
After laying cm layered, vibrating roller pressure rolling by tightening solid machine a like building a rolling pressure layer b _1, by applying further laying-rolling the sediment on the upper surface of the rolling pressure layer b ₁ rolling pressure layer b ₂ .. Bn are sequentially laminated. The uppermost compaction layer b thus compacted
A road surface made of asphalt or concrete is being constructed on n.

[0003]

The above-described conventional roadbed construction method has the following problems. Since the steps of laying and compacting earth and sand are repeated for each of the compacted layers b ₁ , b _2, ... Bn, the construction period is long. A compacting machine for compacting earth and sand is required, and construction costs are high. In order to improve the compaction property of the laid earth and sand, a plurality of types of expensive aggregates such as crushed stones with adjusted grain sizes are used, which also contributes to an increase in construction cost.
Aggregates such as crushed stones are limited in their production area, which increases the transportation cost from the production area to the site. Sand and dust soar during compaction work and the working environment is poor. Since aggregates such as crushed stones with good water permeability are used, the aggregates serve as water storage tanks and may damage the roadbed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to make it possible to construct a roadbed in a short time with a good working environment by a simple process. To provide a roadbed construction method.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a method of constructing a roadbed, characterized in that a solidified material in the form of slurry is permeated from the surface of the embankment to solidify the entire embankment. . The present invention provides a method of constructing a roadbed, in which a solidifying material is added to mountain sand and earth and sand generated on site, and a slurry-like treated soil that has been kneaded with water is infiltrated from the embankment surface to solidify the entire embankment body. It is a construction method of a roadbed characterized by the following. Further, the present invention is a roadbed construction method, characterized in that the embankment is formed at one time up to the height of the roadbed to be constructed in the above-described roadbed construction method.
Furthermore, the present invention provides a roadbed construction method according to any one of the above-described roadbed construction methods, wherein the embankment is constructed using soil generated at a site mixed with waste soil.

[0006]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<A> Construction of the embankment As shown in FIG. 1, earth and sand are piled up at the site where the roadbed 1 is to be constructed, and the embankment layer 2 is constructed. This embankment layer 2 is, for example, as shown in FIG.
As shown in (1), if the roadbed has the required strength and durability, low-cost materials such as soil 21 generated at the site and concrete garbage 22 can be used. The embankment layer 2 is formed at substantially the same height as the roadbed 1 to be constructed without any compaction work. In addition, the formation of the embankment layer 2 requires
It is conceivable to construct by carrying other aggregates such as crushed stones in addition to 1.

<B> Spraying of Slurry-like Solidified Material A slurry-like solidified material 3 having excellent fluidity such as mortar or concrete is sprayed on the surface of the embankment 2 and allowed to stand. Since the embankment 2 does not perform any compaction work, there are many voids 23 between the soil particles constituting the embankment 2 as shown in FIG. Therefore, the solidified material 3 in a slurry state naturally penetrates through the voids 23 and fills the voids 23. In order to improve the permeability of the solidified material 3 in a slurry state, for example, it is conceivable to mix and use a fluidizing material, a thickening material and the like. The hard roadbed 1 is completed by the hardening of the slurry-like solidified material 3. Asphalt, concrete, or the like is cast on the upper surface of the completed roadbed 1 according to the application.

[0009]

[Embodiment 2] The slurry-like treated soil 31 is a solidified material different from the slurry-like solidified material 3 described in Embodiment 1 of the present invention for solidifying the embankment 2 described above.
As shown in FIG. 3, the slurry-like treated soil 31 is transferred to a waste member 311 such as excavated soil or muddy water generated at the site by a solidifying material 312 such as cement and optionally water 313.
Is a solidified material made by mixing and mixing.

[0010]

Embodiment 3 of the Invention Embodiment 2 of each of the above-mentioned inventions
Occurred at another site as a disposal member 311 in
Bentonite, clay, sludge collected from rivers, factory sludge, and the like may be used. Further, in order to improve the fluidity of the slurry-like treated soil 31 to be sprayed on the embankment,
It is also conceivable to mix a fluidizer, a thickener, and the like.

[0011]

As described above, the present invention has the following effects. <A> Unlike the conventional roadbed construction method, it is not necessary to repeat the laying and compacting steps of the earth and sand over multiple layers, so that the construction period can be shortened. <B> There is no need to compact earth and sand, crushed stones, etc., and no compacting machine is required, which reduces construction costs. <C> Since there is no need to compact earth and sand or crushed stone,
Since a plurality of types of expensive earth and sand, crushed stones, and the like with adjusted particle sizes are not used, the construction cost is reduced. <D> Since no compaction work is performed, there is no generation of dust and the like, and the working environment is maintained well. <E> We actively reuse on-site soil, mud, etc. that become waste. <F> Since compaction is not required as described above, there is no need to unnecessarily dig high-quality and expensive rocks used as aggregates constituting the roadbed, which contributes to environmental preservation.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of embankment when constructing a roadbed according to the present invention.

FIG. 2 is an explanatory diagram of the state of infiltration of a slurry-like solidified material into an embankment

FIG. 3 is an explanatory view of a configuration of a slurry-like treated soil.

FIG. 4 is an explanatory diagram of work by a conventional roadbed construction method.

Continuation of the front page (71) Applicant 597028298 1-3-5 Kashiwa-cho, Nagaoka-shi, Niigata, Japan 71) Applicant 591168312 Nakamura Construction Co., Ltd. 71-23, Nakazawa-cho, Hamamatsu-shi, Shizuoka (72) Inventor Kihei Takeda 1-2-13 Negishi, Taito-ku, Tokyo Katsumura Construction Co., Ltd.

Claims (4)

[Claims] 1. A method of constructing a roadbed according to claim 1, wherein a solidified material in a slurry state is permeated from an embankment surface to solidify the entire embankment. 2. A method for constructing a roadbed, comprising: adding a solidifying material to mountain sand or earth and sand generated at a site, adding water, and kneading the treated soil in the form of a slurry from the surface of the embankment to solidify the embankment as a whole; A roadbed construction method characterized by the following. 3. The roadbed construction method according to claim 1, wherein the embankment is formed at a time up to the height of the roadbed to be constructed. 4. The method for constructing a roadbed according to claim 1, wherein the embankment is constructed using soil generated at the site mixed with waste soil.