JP3182674B2 - Construction method of agitated mixing reinforcement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a stirring and mixing reinforcing body containing a core material for reinforcing a cut surface or a general slope .

[0002]

2. Description of the Related Art Diagonal reinforcement for cutting or general slopes
Alternatively, various construction methods for constructing the reinforcement substantially horizontally have been developed.

[0003]

Problems to be Solved by the Invention The above-mentioned conventional cut
The following problems are encountered in the case where the technique of reinforcing a surface or a general slope is used, for example, when a cut surface or a slope is constructed in the immediate vicinity of a railway in use.

<A> It is difficult to carry out reinforcement work without affecting the surrounding ground.

<B> Particularly in the case of a method for improving the earth and sand with a large diameter, the surrounding earth and sand is likely to collapse, which is dangerous.

<C> In the case of an apparatus for improving earth and sand with a small diameter, the danger is reduced, but the number of constructions becomes enormous, and the construction takes time and effort.

[0007]

[Object of the present invention] The present invention has been made in view of the above points, and its purpose is to affect the surrounding ground.
Less likely to cause the collapse of the surrounding soil and construction efficiency
It is an object of the present invention to provide a method for constructing a stirring and mixing reinforcing body, which can be improved .

[0008]

That is, the present invention is directed to a cutting surface or a general slope that is inclined or substantially inclined while discharging a consolidated material with a drilling and stirring hollow rod having a stirring blade at the tip of a rotating shaft.
Drill horizontally, stir and mix the soil and compaction material with stirring blades to build a stirring and mixing reinforcement body, leave the excavation stirring stirring rod with the rotation axis positioned in the stirring and mixing reinforcement body, stirring This is the construction method of the mixed reinforcement.

[0009]

Therefore, the present invention has the following effects. (A) Since the excavated soil and the compacted material are stirred and mixed in the ground while excavating the cut surface or the general slope , the surrounding ground is affected.
The pictorial, can be construction stirred mixture reinforcement of large diameter while avoiding collapse of the surrounding soil. <B> The excavation-stirring hollow rod used for excavation-stirring is left in the ground without being collected and used as a core material. Therefore, the core material can be positioned at the center of the stirring-mixing reinforcing body.
<C> Since the stirring hollow rod is not collected, discharge of the stirring mixed soil at the hole can be avoided.

[0010]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings.

[0011] <b> as shown in the drilling stirred ejection Figure 1, the drilling for the slope stirring hollow rod 1
A construction example of the stirring and mixing reinforcing body 2 using the method will be described. The hollow rod 1 for excavation and agitation is a member having both the function of excavation and agitation of earth and sand and the function as a core material. The excavation wing 12 and the agitation wing 13 are protruded in order from the tip side on the peripheral surface of the hollow rotary shaft 11. I do. The excavating blade 12 and the stirring blade 13 are fixed to the rotating shaft 11 and rotate with the rotation of the rotating shaft 11. Further, if necessary, a co-rotation prevention blade 14 having a diameter larger than the diameter of the two blades 12 and 13 may be provided, or the stirring blade 13 may be provided according to the soil.
May be omitted. When the anti-corotating wing 14 is provided, the anti-corotating wing 14 is disposed at a position between the two wings 12 and 13 so as to allow free rotation. The excavation-stirred hollow rod 1 forms a discharge port at the tip of the rotating shaft 11,
A cement material such as cement milk supplied through the axis of the rotating shaft 11 can be discharged from the vicinity of the stirring blade 13. The discharge port may be formed at a part of the stirring blade 13 in addition to the opening at the tip of the rotating shaft 11 or a side surface of the tip.

A base end of a rotary shaft 11 constituting the excavating and stirring hollow rod 1 is set on a known boring machine 3 and a swivel 4 is provided so that a cementing material such as cement milk can be supplied to the axis of the rotary shaft 11. Attach.

Then, the excavation and stirring hollow rod 1 is rotated to start excavation of the cut surface or the slope surface , and at the same time, the rotating shaft 11 is rotated.
Supply of cementing material such as cement milk is started through the shaft path. Thereby, the drilling step by the rotation of the excavating wing 12, the discharging step of the consolidated material, and the stirring and mixing step of the shaving and the consolidated material by the stirring blade 13 progress in parallel. A large-diameter agitated mixing reinforcing body 2 (soil mortar) in which the excavated soil and the consolidating material are agitated and mixed is built toward the ground. The anti-corotating blade 14 disposed on the rotation shaft in a state that allows free rotation prevents the earth and sand from co-rotating with the stirring blade 13. In the process of constructing the stirring and mixing reinforcing body 2, since the center of rotation of the excavating and stirring hollow rod 1 coincides with the center (axis) of the stirring and mixing reinforcing body 2,
Is always located at the center of the agitation / mixing reinforcement 2.

<B> Setting of core material After the stirring and mixing reinforcing body 2 is built to a predetermined depth, the rotation of the excavating and stirring hollow rod 1 and the supply of the consolidated material are stopped. In the present invention, in order to utilize the excavating and stirring hollow rod 1 used for construction as a core material, the excavating and stirring hollow rod 1 is separated from the boring machine 3 and left in the stirring and mixing reinforcing body 2.
Since the center of rotation of the excavating and stirring hollow rod 1 coincides with the center (axis) of the stirring and mixing reinforcing body 2, the rotating shaft 11 is always located at the center of the stirring and mixing reinforcing body 2 in the process of building the stirring and mixing reinforcing body 2. Will be. Therefore, the rotating shaft 11 constituting the core of the excavating / stirring hollow rod 1 exactly coincides with the center of the stirring / mixing reinforcing body 2, and there is no need to confirm this from outside.

<C> Fixing of the core material (FIG. 2) As shown in FIG.
Cut of the rotating shaft 11 of the stirring and mixing reinforcing body 2 protruding to the ground surface side
The part protruding from the surface to the side of the slope
Established in etc. After placing the concrete wall 5 etc.,
The excavating blade 12 and the agitating blade 13 of the excavating and stirring hollow rod 1 function as a load-bearing body that prevents the excavating and stirring hollow rod 1 from slipping out.

[0016]

The present invention, having the above-described structure, has the following effects as a reinforcing member for a slope.

<A> Excavation while excavating the cut surface or slope
The soil and consolidated material are stirred and mixed in the ground, so
Without affecting, avoiding the collapse of the surrounding ground, large
A stir-mix reinforcement of diameter can be built. That is , the book
The invention will be left on the ground without recovering drilling stirring hollow rod used in the construction of the stirring and mixing reinforcement. Therefore, there is no need to worry about the agitated mixed soil before hardening coming out of the hole together with the excavated agitated hollow rod, and the agitated mixed soil on the cut surface or the slope surface is reinforced.
Safe construction is possible by avoiding loosening and subsidence of the ground around the construction of the body . Moreover, since the stirred mixed soil at the hole is not discharged, the repair work is not required. In addition, as described above, construction can be performed without affecting the surrounding ground and avoiding the collapse of the surrounding ground, so that the construction can be performed without affecting the railway or road slope that is being used. it can.

[0018] <b> from and construction stirred mixture reinforcement of large cross section Cut surface or slopes made large frictional resistance to the surrounding soil, the construction number of reinforcement required for the reinforcement of Cut surface to slope
The amount is small, and the total length of the stirring and mixing reinforcing body is short. For this reason, the construction efficiency is increased, and the cut surface or the slope where the drilling length is restricted or the height is limited, such as a railway, a road, or a site close to a building, is used. Can be easily constructed.

< C > The withdrawal resistance of the excavating / stirring hollow rod after the construction is determined not only by the adhesive force between the peripheral surface of the rotating shaft and the stirring / mixing reinforcing body, but also as a load-bearing body that restricts the excavating blade and the stirring blade from coming out. Since it functions, an extremely large pull-out resistance can be exerted when a tensile force acts on the core material.

< D > Since the excavation-stirring hollow rod whose rotation axis is always located at the center of the stir-mixing reinforcing body during construction is used as the core material of the stir-mixing reinforcing body, the core material is accurately positioned at the center of the stir-mixing reinforcing body. Can be installed in various locations. When the core is disposed at the center of the agitated mixing reinforcing body, it is extremely advantageous in transmitting the drawing force generated in the core to the surrounding ground via the agitated mixing body.

< E > Since the work of extracting the excavation-stirring hollow rod is unnecessary, the construction efficiency is improved and the construction period can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a drilling / stirring hollow rod during construction.

FIG. 2 is an explanatory view of a completed construction state in which the excavation-stirred hollow rod is used as a core material and is fixed to a concrete wall.

[Description of Signs] 1 Excavation / Stirring Hollow Rod 2 Stirring / Reinforcement Body 3 Boring Machine 4 Swivel 5 Concrete Wall 11 Rotating Shaft 12 Excavation Wing 13 Stirring Wing 14 Co- rotation Prevention Wing

Continuing on the front page (72) Inventor Yukihiko Tamura 2-22-15- 106, Katsuradai, Midori-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Kosei Fukuda 2-4-1 Akasaka, Minato-ku, Tokyo Tenox Corporation (72 ) Inventor Shigeru Yoshida 2-4-1, Akasaka, Minato-ku, Tokyo, Japan Inside Tenox Co., Ltd. (72) Inventor Shuji Umi 2-4-1, Akasaka, Minato-ku, Tokyo Inside Tenox Corporation (56) References JP-A-3-110292 (JP, A) JP-A-49-13907 (JP, A) JP-A-53-145306 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 3/12 E02D 5/74-5/80

Claims (1)

(57) [Claims] 1. A cutting surface or a general method while discharging a consolidated material by a drilling and stirring hollow rod having a stirring blade at a tip of a rotating shaft.
Cut the surface obliquely or almost horizontally, stir and mix the shavings with the cement with the stirring blades to build a stirring and mixing reinforcement body, and excavate and stir hollow rod with the rotating shaft positioned in the stirring and mixing reinforcement body The method of constructing the stirring and mixing reinforcement body.