JPS5938418A - Ground agitation work by plural agitating rods - Google Patents

Abstract

PURPOSE:To sufficiently stir and mix the ground by providing agitating rods having agitating blades on their peripheries in parallel in such a way that the rotation circular arc of one agitating blade of the agitating rod is partly lapped with the rotation circular arc of the other agitating blade. CONSTITUTION:A pair of agitating rods 3 and 3' are each turned at a high speed and a low speed in opposite directions for excavating the ground, and cement milk is jetted from the lower end of the rods through grout supply tubes 8 and 8'. Soil and sand on the high-speed agitating rod 3 side take the soil and sand on the low-speed agitating rod 3 side into the rod 3 side in the overlapping portion of the rotation circular arcs R and R' of the agitating blades 5 and 5'. On the other hand, the soil and sand on the rod 3 side are pushed out toward the rod 3' side by the difference in their centrifugal forces. The soil and sand on both the rods 3 and 3' sides are thus mutually mixed to form a homogenous soil cement.

Description

[Detailed Description of the Invention] This invention relates to the construction of an underground continuous wall using soil cement,
This article relates to a ground stirring method using multiple stirring rods, which is used for soil improvement, etc.

Conventionally, as this type of ground stirring method, a plurality of stirring rods each having a large number of stirring blades protruding from the outer circumferential surface of the rods are arranged in parallel to each other and with the stirring blades overlapping each other by 1=i. A construction method is known in which a plurality of these stirring rods are rotated at a constant speed to excavate and stir the ground. However, in this conventional method, stirring is performed separately within a narrow range of each stirring rod, and sufficient +k +I mixing is achieved as a whole (11
It had some annoying flaws.

The present invention provides an improved ground stirring method using multiple stirring rods, which eliminates the drawbacks of the conventional method and is capable of stirring and mixing the entire area covered by several stirring rods. The present invention will be explained in detail with reference to the song.

First, the stirrer (M) used in the construction method of the present invention will be explained. In Figure 1.1, the rotary output shaft (2
), +2+' = protruding, stirring rods (31
, (31') are connected and hang down parallel to the loaf.The above stirring rods (31, (3)9 have the same structure, and when looking at one stirring rod (3), the hollow rod (410
) has many straight □□□-shaped stirring blades (51
- are provided protruding in the radial direction, and in this example, these stirring blades +51- are two stirring blades +51 located in the diametrical direction.
, (51 are arranged in multiple stages along the longitudinal direction of the rod (4) with appropriate gaps between them, and at the lower end of the rod (4) there is a digging blade arm +61 with approximately the same diameter as the stirring blade (5). ,+61
are provided to protrude from each other in the diametrical direction, and a digging blade (7) is provided on both arms.
) - is provided protrudingly, and the stirring rod (3) like a thread and the other force stirring rod (3j' of the same structure) are connected to each other by the one force stirring blade and the digging blade arm of the other. A part of the blade and O/excavator blade arm are partially wedged between the upper and lower parts, and (Rf is Arranged so that it partially polymerizes,
Both stirring rods f31 and +31' are driven by the drive unit (1) to move one (31) to bH and the other (3j
Change 9 to rotate at a slower speed 4). In this example, both stirring rods (3) and (3)' rotate in opposite directions. (8), (8)2 is rod envelope 1,
A chemical liquid supply pipe runs vertically into the hollow of +41', and an injection port of 11.1LLI is provided at the lower end of each rod.

The method of the present invention using the above-mentioned i device (goods) will be explained next. - As an example, clockwise when looking at the stirring rod fi+ of 10,000, approximately II-QR, P, M, external force (3)
' is rotated counterclockwise at approximately 23R, P, and M, respectively, and when you start excavating into the ground with these stirring rods (3 (, (3)), the excavation blade (71-
1 (71'-), circular pits communicating with each other are excavated and the excavated earth and sand in each pit is stirred by stirring blades +51-1+51'-, respectively.

Along with this excavation, cement milk is supplied to the chemical supply pipe (8), (
8) Inject from the lower end of the rod through 9.

Along with the above action, the stirring rod (3) is given high-speed rotational energy by the stirring blade +51-, or the earth and sand along the stirring blades (5)-, +51'- are rotated by the circular arc (g)); At the polymerized part of the ridge, the stirring rod +31' takes the sediment into the stirring rod (3), and the stirring rod (3), which rotates at high speed, takes the sediment into the stirring rod (3), which rotates at low speed. A stronger centrifugal force is applied to the earth and sand on the stirring rod (3) due to the centrifugal force difference, and the earth and sand on the stirring rod (3
Due to these actions, both stirring rods (3) and (3)' mix the earth and sand with each other, and moreover, the earth and sand move in and out of both rods frequently, and sufficient stirring and mixing is performed as a golden cup. A homogeneous fill cement is finally produced.

The rotation speed of the stirring rods (3) and (3)' is changed as appropriate depending on the properties of the ground, and the stirring blades are rotated by the rods (41
, +41'.

The stirring rod according to the present invention is not driven by one rod, but has three rods,
You can use an appropriate number of books, 5 books, etc.

According to the ground stirring method using multiple stirring rods, it is possible to completely stir and mix the earth and sand over a wide area covered by the multiple stirring rods in seven excavation processes. If it is used for stirring in the construction of the continuous underground 11, it will enable extremely efficient 1:r construction and have the advantage of being able to produce homogeneous soil cement over a wide range.

[Brief explanation of the drawing]

The drawings show a practical example of this investigation, and FIG. 1 is a partially omitted front view of the stirrer used, and the figure is an enlarged sectional view taken along the line 1--■ in FIG. 3.39... Stirring rod, <zSll'... Rod, j, 5'... Stirring blade, RSR'... Rotating arc. Takeshi M (Tamayo Zuizai Co., Ltd. agent, key engineer 1) Letter (method) +1/+Japanese 37 year l-ノ+10++ 1-Director General, Fin Kazuo Wakasugi Tono 1 Indication of middle A 11 Showa S7 I1 Patent Application No. 1≠5200 +E3
, hli +l Nasuru・+1111 Patent applicant (11・jl, U'I J' 1 ('rl'+) Yoshihiko Kawai (and 7 others) 4. Agent name interpreter (alBx) Tanaka ``Takebun'']゛15 Amendment Order'') l', l f1 July 12, 1960 (Shipping date: 30 of the same month of the same year) () Number of inventions increased from 40 sleeves by 7, ? + Subject of Ii suspension (1) Drawings (2) Power of attorney 8 Contents of amendment fl+ The power of attorney for patent applicant Kizu Kawai will be supplemented. (2) Extract the power of attorney by clearly stating the address and name of the authorized person for the patent applicant Sanwa Kizai Co., Ltd. (3) Replenish the traced drawings. ”−

Claims (1)

[Claims] Outside the rod 1. In addition, a plurality of stirring rods each having a large number of stirring blades protruding approximately in the radial direction at intervals in the longitudinal direction are arranged parallel to each other, and one of the adjacent stirring rods is The rotational arc of one stirring blade and the rotational arc of the other stirring blade are placed in a positional relationship where they partially overlap, and one of the adjacent stirring rods is rotated at a higher speed than the other to rotate all of the plurality of stirring rods. A ground stirring method using multiple stirring rods, in which a hole is drilled into the ground at t.