JPH07189264A - Stirred, mixed and reinforced body and method of reinforcing construction of slope - Google Patents

Abstract

PURPOSE:To save the labor of the execution of works, and to shorten the term of work by arranging a hollow core material having a drainage function at the axial center of a reinforced columnar body constructed by stirring and mixing a consolidation material while discharging the consolidation material into the ground and draining water through the core material. CONSTITUTION:A hollow core material 20 is inserted into the axial center of a central auger, and a consolidation material is discharged from the front end of the auger and the auger is propelled. A water collecting hole 21 is formed at the front end section of the core material 20 at that time. A reinforced columnar body 30 is built up to specified depth, and the auger is rotated reversely and extracted while the core material 20 is left and the consolidation material is discharged, thus forming a stirred, mixed and reinforced body 40. A face of a slope 50 is covered with a water- barrier sheet 51 as required, and a bearing block 52 is fixed at the projecting end of the core material 20 projected from the face of the slope 50. A bedrock is strengthened and reinforced by the stirring, mixing and reinforced body 40, and the core material 20 works to the increase in the shearing resistance of the reinforced body 40. Excess water is discharged onto a ground surface through the water collecting hole 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirrer reinforcement method and a stirrer reinforcement method for strengthening and reinforcing embankment slopes and steep cut slopes.

[0002]

2. Description of the Related Art FIG. 4 shows a slope reinforcing method premised on the present invention. In this construction method, an improved columnar body b having a columnar shape was constructed from the cut slope a toward the ground while discharging the solidifying material into the ground by an excavation stirrer (not shown) and set in advance in the excavator stirrer. The core material c such as a steel rod is left in the improved columnar body b, and only the excavation and agitation device is recovered, and a plurality of stirring / mixing reinforcing bodies d in which the core material c is passed through the shaft center of the improved columnar body b are constructed, This is a method for strengthening and reinforcing the ground by the peripheral frictional resistance and shear resistance of the stirring and mixing reinforcement d. After the construction of the stirring and mixing reinforcement d, the plurality of drainage pipes e are installed through the retaining wall e at positions avoiding the stirring and mixing reinforcement d to perform drainage work.

[0003]

[Problems to be Solved by the Invention] In the above-mentioned technique for reinforcing the slope a, it is necessary to install the drainage pipe e in a separate step from the construction of the stirrer / mixing reinforcement d, and many installations of the drainage pipe e It takes effort and time.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a slope reinforcement technique capable of saving labor and shortening the construction period.

[0005]

[Means for Solving the Problems] That is, according to the present invention, a columnar reinforcing columnar body constructed by stirring and mixing while discharging a solidifying material into the ground, and penetrating the reinforcing columnar body and integrally fixing them. It is a stirring and mixing reinforcement body composed of a hollow core material having a drainage function.

Further, according to the present invention, a solid reinforcing material is discharged into the ground while stirring and mixing to construct a columnar reinforcing columnar body, and the reinforcing columnar body is made to project from the tip of the reinforcing columnar body and has a drainage function. This is a slope reinforcement method in which the material is located.

[0007]

According to the present invention, the core material arranged in the reinforcing column body functions as a reinforcing member to strengthen and reinforce the ground, and the core material has drainage property, so that the stirring and mixing reinforcement body is constructed. The drainage work will be completed at the same time. Therefore, it is not necessary to carry out the drainage work in a separate process, which can save labor and shorten the construction period. In addition, the drainage by the core material is improved by loading the core material with the drain, and the construction can be performed regardless of the installation direction of the stirring and mixing reinforcement.

[0008]

First Embodiment A first embodiment will be described below with reference to the drawings.

<B> Ground improvement work As shown in FIG. 2, the hollow core 2 is attached to the shaft of the hollow auger 10.
0 is inserted and the solid material is discharged from the tip of the auger 10 to proceed with the excavation. The auger 10 is provided with an excavation blade 11, a co-rotation preventing blade 12, and a stirring blade 13, and only the co-rotation preventing blade 12 is attached to the auger rod 14 in a state permitting rotation. Further, a discharge port (not shown) is formed at the tip of the auger 10, and a solidifying material such as cement milk is discharged from the discharge port through the shaft path of the auger rod 14 and mixed with the ground soil by the stirring blade 13 to obtain 50 cm. The structure is such that the improved cylindrical body 30 having a cylindrical shape can be extended. The hollow core member 20 is a member that has both the reinforcing member function of the reinforcing column body 30 and the function as a drainage member, and its total length is set longer than that of the reinforcing column body 30 to be constructed. As shown in FIG. 3, a water collecting hole 21 is provided. Water collection hole 2
The formation position of 1 may be at the front of the tip of the reinforcing column 30 as described later. Further, as the material of the hollow core member 20, for example, steel, fiber reinforced plastic, resin, or a combination thereof can be used as a laminate. In FIG. 3, reference numeral 22 is the auger rod 1 shown in FIG.
It is a collar material that is locked to No. 4 and follows the auger 10 to advance.

<B> Set of core material Once the reinforcing column 30 is constructed to a predetermined depth, the hollow core material 20
While leaving the above, the auger 19 is reversed and extracted while discharging the solidifying material to obtain the stirring / mixing reinforcing body 40 in which the hollow core material 20 is located at the shaft center of the reinforcing columnar body 30 as shown in FIG.
If necessary, the slope 50 is covered with a water-blocking sheet 51, and a block-shaped bearing plate 52 is fixed to the protruding end of the hollow core member 20 protruding from the slope 50. The pressure support plate 52 is a member that receives the reaction force from the stirring and mixing reinforcement 40 and supports the surface of the slope 50, and is not limited by its material, but if it is formed of lightweight reinforced plastic (FRP), it is transported and handled. It is convenient for After the stirring and mixing reinforcement 40 is constructed, the entire surface of the slope 50 is considered in consideration of the construction purpose (stabilization of cut slope, purpose of temporary earth retaining for earth anchor, purpose of strengthening slope for earthquake rainfall measures, etc.). Various auxiliary works such as covering with a concrete retaining wall or attaching a fixing tool such as a nut to the base end of the hollow core material 20 by horizontally extending the abdomen material may be appropriately performed. Furthermore, if a pipe member bent with its open end facing downward is attached to the base end of the hollow core member 20 protruding from the auxiliary work, rainwater and the like can be prevented from entering the hollow core member 20.

<C> Function of Core Material The stirring and mixing reinforcement 40 thus constructed can strengthen and reinforce the ground. Further, in particular, the hollow core material 20 has a function of increasing the shear resistance of the stirring and mixing reinforcement 40, and also has a function of draining surplus water to the surface of the ground through the water collecting holes 21 as shown by an arrow in FIG. There is no need to install a drain pipe in.

[0012]

[Embodiment 2] In the above embodiment, the hollow core material 10 is set in the auger 10 in advance, but the hollow core material 20 may be inserted after the reinforcing column 30 is constructed.
In this case, the water collecting hole formed at the tip of the hollow core material 20 is penetrated to the position where it projects from the tip of the reinforcing column 30 toward the ground side.

[0013]

[Embodiment 3] If the position of the discharge port at the base end of the stirring and mixing reinforcement 40 is higher than the water collecting position in the ground, it is expected that the drainage performance will be deteriorated. In such a case, each reinforcing column hollow core material 20
By arranging various well-known drain materials having water absorption continuously inside, the water can be drained regardless of the head difference due to the capillarity of the drain material.

[0014]

As described above, the present invention has the following effects.

<A> The hollow core material constituting the stirring and mixing reinforcement body not only functions as a reinforcement member of the reinforcement column body, but also
It also functions as a drainage member. Therefore, when the construction of the stirring and mixing reinforcement is completed, the wastewater treatment work will be completed at the same time. There is no need to perform the work of installing the drainage pipe in a separate process from the agitation and mixing reinforcement body, which can save labor and shorten the construction period.

<B> If the drain material is installed in the hollow core material, the water can be drained regardless of the installation direction of the stirring and mixing reinforcement.

[Brief description of drawings]

FIG. 1 is an explanatory view of a stirring and mixing reinforcement body.

[Figure 2] Explanatory drawing when constructing the reinforcement column

FIG. 3 is an explanatory diagram of the tip of the hollow core material.

FIG. 4 is an explanatory diagram of a technology on which the present invention is based.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihiko Tamura 2-22-15-106 Katsuradai, Midori-ku, Yokohama-shi, Kanagawa (72) Inventor Kosei Fukuda 2-4-1 Akasaka, Minato-ku, Tokyo Tenox Co., Ltd. (72) Inventor Shigeru Yoshida 2-4-1, Akasaka, Minato-ku, Tokyo Inside Tenox Co., Ltd. (72) Inventor Kamifumi Kamae 2-4-1-1, Akasaka, Minato-ku, Tokyo Inside Tenox Co., Ltd.

Claims (10)

[Claims] 1. A columnar reinforcing column body constructed by stirring and mixing while discharging a solidifying material into the ground, and a hollow core material having a drainage function which is integrally fixed to penetrate the reinforcing column body. A stirrer / mixer reinforcement composed of. 2. A columnar agitation and mixing reinforcement body constructed by agitating and mixing a solidifying material into the ground while discharging, and a hollow core material having a drainage function which is disposed so as to penetrate the agitation and mixing reinforcement body. An agitating / mixing reinforcement body composed of a support plate connected to an end of a core material protruding from an end of the agitating / mixing reinforcement body on the ground side. 3. The stirrer / mixer reinforcement according to claim 1 or 2, wherein a water collecting hole is provided on the peripheral surface of the tip of the core material. 4. The agitation and mixing reinforcement body according to claim 1, wherein the drain material is contained in a hollow core material. 5. The agitation and mixing reinforcement body according to any one of claims 1 to 4, wherein the core material is formed by coating a steel pipe with a resin coating. 6. The stirring and mixing reinforcement according to any one of claims 1 to 4, wherein the core material is made of FRP. 7. A solid reinforcing material is discharged into the ground while stirring and mixing to construct a columnar reinforcing columnar body, and a core material having a drainage function is positioned on the reinforcing columnar body by projecting from the tip of the reinforcing columnar body. The slope reinforcement method. 8. A columnar reinforcing column body is constructed by stirring and mixing the solidifying material into the ground while the hollow core material is inserted into the hollow auger, and collecting the auger to obtain the reinforcing column body. A slope reinforcement method in which the tip of the core material left on the shaft core protrudes from the tip of the reinforcing column. 9. A stiffening material is discharged into the ground while stirring and mixing to construct a columnar reinforcing columnar body, and a hollow core material is penetrated into the axis of the reinforcing columnar body to reinforce the tip of the core material. A slope reinforcement method that projects from the tip of the pillar. 10. The slope reinforcing method according to claim 7, wherein a support plate is provided at the base end of the hollow core material.