JPH0734445A - Stabilizing processing construction method for piled soil material - Google Patents

Abstract

PURPOSE:To shorten the construction time and reduce the kind of execution machinery by spraying a stabilizer into the piled soil in the bowl of a scraper during the transport of the piled soil by the scraper, and carrying out stirring and mixing. CONSTITUTION:At the center in the upper part of the bowl 6 of a scraper 5, the stirring rod 8 of a sitrring device 7 is laid in a rotatable manner over the front and rear parts, and conneced to the hydraulic motor of the scraper 5 through a base edge part, and two main stirring blades 9 which cross at right angle the rod 8 are installed on the rod 8. Then, in the state where the device 7 is erected, the apron of the scraper 5 is raised, and soil, sand, etc., are excavated by a cutting edge, and piled into the bowl 6. During the transport of the piled soil material, the rod 8 is turned down horizontally, and the stabilizer is supplied from a stabilizer feeding device 1 by revolving the rod 8, and sprayed into the piled soil, and stabilization treatment is carried out. The discharged soil is transported to a soil spraying place, and discharged and sprayed by an ejector. Accordingly, the execution time can be shortened by carrying out the stabilization treatment during the transport of the piled soil material, and the kind of the execution machinery can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a road body material or a roadbed material,
The present invention relates to a method for stabilizing embankment materials such as roadbed materials, and more particularly, to a method for stabilizing embankment materials of a road mixing type in which the embankment material is transported by a scraper.

[0002]

2. Description of the Related Art Usually, in order to improve the soil quality of cohesive soil with a high water content and soil with insufficient strength, which is judged not to be good as an embankment material, a stabilizing treatment using a stabilizer such as cement or lime is performed. ing. There are road mixing method, central plant mixing method, ground mixing method, etc. as the stabilization treatment method for the embankment material, but in the case of cohesive soil with a high water content, the road mixing method is often used. Conventionally, the construction flow of cutting and embankment construction by the stable treatment method of embankment material of the road mixing method is as shown below. Excavation → Transportation → Shaping → Stabilizer spreading → Mixing → Leveling → Roll compaction →
Curing In general, a carrier scraper (carrying distance of 60 to 400 m) or a motor scraper (carrying distance of 200 to 1200 m) is often used for carrying the embankment material depending on the carrying distance.

[0003]

However, in the conventional road mixing type embankment stabilization treatment method using a scraper, transportation, stabilizer spreading, mixing, laying, rolling and curing are separate steps. As a result, the number of man-hours is increased and it takes a long time, the number of types of construction machines is increased, and the workability is inferior. Therefore, an object of the present invention is to provide a method for stabilizing the embankment material that can reduce the construction time and the type of construction machine.

[0004]

In order to solve the above-mentioned problems, a method of stabilizing embankment material according to the present invention is to spread the stabilizer on the embankment material in the scraper bowl while the embankment material is being conveyed by the scraper. , Stirring, and mixing.

[0005]

In the above means, the stabilization treatment is carried out in parallel in the scraper bowl during the transportation of the embankment material. The stabilizer is preferably in powder form, and its dispersion is
Preference is given to using compressed air.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an apparatus used for implementing a part of the embankment material stabilization treatment method of the present invention. In the figure, reference numeral 1 denotes a self-propelled stabilizer supplying device. The stabilizer supplying device 1 includes a tank 2 for stocking powder stabilizers such as cement and lime.
And a compressor 4 for producing compressed air for transporting the stabilizer by a transport hose 3 to a scraper stirring device described later. 5
Is a scraper towed by a tractor (not shown),
The embankment material is excavated and loaded, transported, discharged and spread, and leveled. The scraper 5 stirs the embankment material loaded in the bowl 6 together with the stabilizer and mixes them with each other. 7 is installed. That is, as shown in FIGS. 2 and 3, at the center of the upper portion of the bowl 6 of the scraper 5, a hollow cylindrical stirring rod 8 forming a part of the stirring device 7 is rotatably provided across the front and rear. While being installed, it is connected to a hydraulic motor (not shown) mounted on the rear portion (right side in FIG. 2) of the scraper 5 via a base end portion. The stirring rod 8 is erected by a hydraulic cylinder (not shown) whose base end is connected to a piston rod through a swivel joint, and a cylinder body is pivotally attached to the rear of the scraper 5. (See FIG. 4), the base end of the transport hose 3 is connected to the transport hose 3 via a swivel joint (not shown). The stirring bar 8 has
Two main stirring blades 9 orthogonal to the stirring rod 8 are appropriately separated from each other and are attached with a 90 ° phase shift, and in order to enhance mixing efficiency, each main stirring blade 9 has its own structure. A plurality of sub stirring blades 10 orthogonal to the main stirring blade 9
Suitably spaced from each other and mounted in parallel. In addition, a stabilizer jet 11 for jetting a stabilizer is formed in the stirring rod 8 so as to be located between the two main stirring blades 9.

In order to carry out the method for stabilizing the embankment material using the apparatus having the above construction, the agitator 7 is raised as shown in FIG. 4, and the apron is raised while the scraper 5 is pulled by the tractor. The earth and sand are excavated by the cutting edge and loaded into the bowl 6, and when the embankment material is filled in the bowl 6, the apron is lowered to convey the embankment material to the scatter place. During transportation of the embankment material, as shown in FIG. 2, the stirring rod 8 of the stirring device 7 is laid down horizontally, the stirring rod 8 is rotated by a hydraulic motor, and the stabilizer feeding device 1 that accompanies the scraper 5 is driven. Stabilizer is supplied from above and sprayed on the embankment. Therefore, the embankment material is stably treated during its transportation. When the embankment material is transported to the soiling site, as shown in FIG. 4, the agitator 7 stands up, the apron is raised, and after the soil is discharged and soiled by the ejector, shaping, leveling and rolling are performed. After that, he is cured.

In the above embodiment, the scraper 5 is of the towed type and the stabilizer supplying device 1 is of the self-propelled type. However, the present invention is not limited to this, and the scraper 5 may be self-propelled. The stabilizer supply device 1 may be a traveling type and a towed type. The scraper 5 is not limited to a single scraper, but may be a twin scraper.

[0009]

As described above, according to the embankment material stabilization treatment method of the present invention, since the stabilization treatment is carried out in parallel in the scraper bowl during the embankment material conveyance, the embankment material conveyance, The stabilizers can be sprayed and mixed in one step, the construction time can be shortened, the types of construction machines can be reduced, and the construction efficiency can be remarkably improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus used for carrying out a part of a method for stabilizing embankment material according to the present invention.

FIG. 2 is a perspective view of a scraper of the device shown in FIG.

FIG. 3 is a plan view of a main part of the scraper shown in FIG.

FIG. 4 is an operation explanatory view of the scraper shown in FIG.

[Explanation of symbols]

 1 Stabilizer Supply Device 3 Transport Hose 5 Scraper 6 Bowl 7 Stirrer

Claims (1)

[Claims] 1. A method for stabilizing embankment material, characterized in that while the embankment material is being conveyed by a scraper, the stabilizer is sprayed on the embankment material in the bowl of the scraper and is stirred and mixed.