JP5869388B2 - How to construct a retaining wall - Google Patents

Description

  The present invention relates to a method for constructing a retaining wall of a shaft when constructing an underground structure or the like.

Conventionally, the construction of a retaining wall (earth retaining wall) in the case of constructing a shaft for constructing a building or an underground structure of civil engineering is performed as follows.
Holes are continuously drilled in the ground using an earth auger machine, and the soil, cement, and bentonite liquid are agitated to form soil cement pillars in the soil. The H-shaped steel is inserted, and the soil cement is solidified to construct the soil cement column. Then, after the soil cement column is constructed, a ground retaining wall is constructed by rooting the ground and exposing the surface of one flange of the H-shaped steel in the soil cement column.
In other words, it is not preferable that the soil cement (foreign matter) covering the surface of one flange of the H-section steel in the soil cement column array remains when the wall of the underground structure is constructed on the surface of the retaining wall. Also, one flange of the H-section steel in the soil-cement column row is made because it is possible to weld other steel materials to the surface of one flange of the H-section steel in the soil-cement column row. The surface is exposed.
In order to expose the surface of one flange of the H-section steel in this soil cement column, the work of removing the soil cement covering the surface of the one flange is performed using a heavy machine or manually. However, the suspension work was difficult. In other words, the lifting work using heavy machinery is difficult to operate heavy machinery and requires a skilled operator. In addition, the lifting work by human power is laborious and difficult.
Therefore, a special H-shaped steel with an insulating film that can be stretched on the H-shaped steel is formed, and the special H-shaped steel is inserted into an unhardened soil cement column with the insulating film facing the root cutting side. An insulating film is stretched and connected to the cement pillar to form a cut edge, and the hanging work can be carried out with the cut edge as a boundary. A construction method is known (see Patent Document 1).

Japanese Patent Laid-Open No. 06-73727

However, in the method of Patent Document 1, the insulating film is pulled up after penetrating the special H-section steel into the unhardened soil cement pillar, and therefore, when the pull-up is performed, there is a soil cement between the surface of the H-section steel and the film. Since it penetrates and hardens, the hardened soil cement sticks to the surface of the H-shaped steel, and even if the film is peeled off, the surface of the H-shaped steel is not exposed cleanly. Accordingly, in order to expose the surface of the H-shaped steel as the core material, it is necessary to work to remove the soil cement stuck to the surface of the H-shaped steel, and the work to expose the surface of the H-shaped steel is difficult. There was a problem.
The present invention provides a method for constructing a retaining wall capable of exposing the surface of a core material with a simple operation.

The method for constructing a retaining wall according to the present invention forms a column of soil cement pillars in the ground, builds H-shaped steel in each soil cement pillar of the pillar row, and after the soil cement of the pillar row is hardened, while Excavation the ground surrounded by tubular elements, a method of constructing the one surface earth retaining walls exposing the flanges of the H-shaped steel to remove soil cement roots cutting side of the tubular elements, the H-shaped is built up one with plywood plywood is bonded to the surface of the flange covering the surface H-beams of steel uncured soil cement in columns, after the soil cement in soil cement pillar has hardened, soil cement The ground surrounded by the column of pillars is rooted , and a flat plate with one edge is sharply inserted between the sharp edge and the upper surface of the plywood plate and the surface of one flange of the H-section steel. As you go A method of Ru to expose the surface of one of the flanges of the H-shaped steel by going peeled Niya plate away from the surface of one flange of the H-shaped steel from one end, as the plywood, the Soil Cement When peeled from the surface of one flange of H-section steel after hardening, the strength to peel the soil cement attached to the surface opposite to the surface facing one flange of H-section steel from the soil cement column Since it has what was used , the plywood can be easily peeled off continuously with less force by the lever principle, and the work of exposing the surface of one flange of the H-section steel can be performed more easily.

The perspective view which showed the state which peels a coating | covering material. The perspective view which shows the H-section steel with a plate material used for the mountain retaining wall construction method. The cross-sectional view which shows the column row | line | column of the soil cement pillar which built in the H-section steel with a board | plate material. The longitudinal cross-sectional view which shows the soil cement pillar which incorporated the H-section steel with a board | plate material (AA cross-section equivalent figure of FIG. 3). Sectional drawing which shows the vertical shaft surrounded by the mountain retaining wall. The perspective view which shows the H-section steel with a plate material used for the mountain retaining wall construction method.

Embodiment 1
In the mountain retaining wall construction method according to the first embodiment, as shown in FIG. 2, an H-section steel 1 as a core material and a surface 4 of one flange 2 of the H-section steel 1 (one not connected to a web 3 described later). A plate-shaped H-section steel 6 provided with a plate material 5 as a covering material attached to the surface) so as to cover the surface 4 is used.
The H-shaped steel 1 has a long side called a pair of flanges 2; 2 at long edges located at both ends of a long substrate called a web 3 so as to face each other in parallel to the substrate surface of the long substrate. A scale plate is provided, and the cross section is formed in an H shape.
As the plate material 5, for example, a veneer plate having a plate thickness of about several mm (for example, 3 mm) was used.

  Then, the plate-shaped H-shaped steel 6 is built in the uncured soil cement column 8 where the soil cement 7 is not hardened, with the surface 4 of one flange 2 facing the root cutting side 10 of the ground 9 (see FIG. 3; see FIG. After the soil cement 7 in the column 11 of the soil cement column 8 has hardened, the ground 9 surrounded by the column 11 is rooted and the plate material 5 is peeled off as shown in FIG. The surface 4 of one flange 2 is exposed.

  As shown in FIG. 1, when the sheet cement 7 is hardened and peeled off from the surface 4 of one flange 2 of the H-section steel 1, a surface 13 opposite to the surface 12 facing the surface 4 ( The board | plate material which had the intensity | strength which peels the soil cement 71 adhering to the back surface of the surface 12 from the soil cement pillar 8 was used.

A mountain retaining wall construction method according to the first embodiment will be described.
First, as shown in FIGS. 3 and 4, a hole row in which the holes 20 are continuously drilled in the ground 9 is formed. Next, the drilled soil, cement, and bentonite liquid are stirred in the hole 20 to form the column array 11 of the soil cement columns 8 on the ground 9.
In addition, as shown in FIG. 2, the H-shaped steel with a plate material in which a plate material 5 as a covering material covering the surface 4 of the one flange 2 is attached to the surface 4 of one flange 2 of the H-shaped steel 1 with an adhesive or the like. 6 is prepared at the factory or in the field.
As shown in FIGS. 3 and 4, the H-shaped steel 6 with a plate material is built in each uncured soil cement column 8 where the soil cement 7 is not hardened. The plate 5 is attached to the surface 4 to the extent that it does not peel from the surface 4 of one flange 2 of the H-section steel 1 when the H-section steel 6 with the plate is built in the soil cement column 8. Good.
The soil cement 7 in the soil cement pillar 8 waits for hardening, and after the soil cement 7 in the soil cement pillar 8 is hardened, the ground 9 surrounded by the pillar row 11 of the soil cement pillar 8 is rooted, and FIG. As shown in FIG. 3, the plate material 5 is peeled off to expose the surface 4 of one flange 2 of the H-section steel 1.
When the plate member 5 is peeled off from the surface 4 of one flange 2 of the H-section steel 1, a flat plate having one edge that is sharply formed, such as an unillustrated flat plate, is attached to one end (upper end) ) And the surface 4 of one of the flanges 2 of the H-section steel 1 and the surface 5 facing the surface 4 by separating the plate 5 away from the surface 4 from one end side. The soil cement 71 adhering to the opposite surface 13 is peeled off from the soil cement column 8 (see FIG. 1).
Soil cement 72 (see FIG. 1) remaining between the surface 4 and the surface 4 of one flange 2; 2 of the H-section steel 1; 1 adjacent to each other is removed, and the H-section steel 1 adjacent to each other is removed. A retaining wall 100 (see FIG. 5) is constructed such that the surface between the surface 4 and the surface 4 of the one flange 2; 1 is positioned on substantially the same plane as the surface 4;
The mountain retaining wall 101 is assembled with a mountain retaining support material 101 like a belly on the surface, and the shaft 102 is dug down, and an underground structure is set up on the shaft 102 (see FIG. 5).

That is, according to the first embodiment, as shown in FIG. 3, after the soil cement 7 in the soil cement column 8 in which the plate-shaped H-section steel 6 is built is hardened, one flange 2 of the H-section steel 1 is provided. When removing the unnecessary soil cement 70 located on the root cutting side 10 with respect to the surface 4 of the steel, the plate material 5 is peeled off from the surface 4 of one flange 2 of the H-shaped steel 1 as shown in FIG. The surface 4 of the one flange 2 is exposed and the H-section steel 1 adjacent to each other; the soil cement 72 remaining between the surface 4 and the surface 4 of the one flange 2; Remove.
Therefore, according to the embodiment, the surface 4 of one flange 2 of the H-section steel 1 can be exposed cleanly by a simple operation of peeling the plate material 5.
Further, as a covering material, when the soil cement 7 is hardened and peeled off from the surface 4 of one flange 2 of the H-section steel 1, the soil cement 71 attached to the surface 13 has a strength to peel off from the soil cement column 8. Since the plate member 5 is used, the plate member 5 can be easily peeled off continuously with a smaller force with the upper end of the plate member 5 and the surface 4 of the H-section steel 1 can be exposed. It becomes easy to do.

Embodiment 2
As shown in FIG. 6, an H-section steel 1 as a core material, a plate 5 as a surface covering material attached to a surface 4 of one flange 2 of the H-section steel 1 so as to cover the surface 4, and H If an H-shaped steel 60 with a plate material provided with a plate material 41 as an end surface covering material attached so as to cover the end surface 40 on the long edge side of the surface 4 of one flange 2 of the shape steel 1 is used, The soil cement 7 becomes difficult to enter between the surface 4 and the surface 4 of one flange 2 of the H-section steel 1 can be exposed more cleanly by a simple operation of peeling the plate material 5.

Embodiment 3
In the first embodiment, the H-shaped steel 6 with a plate material is built in the soil cement column 8 so that the soil cement 7 does not enter between the plate material 5 and the surface 4 of one flange 2 of the H-shaped steel 1. At this time, the side edge surface 21 (see FIG. 2) of one flange 2 of the H-section steel 1 and the side edge surface 51 (see FIG. 2) of the plate material 5 are covered so that the plate material 5 is not displaced or detached. You may attach the board | plate material 5 so that the surface 4 of one flange 2 may be covered by attaching the adhesive tape outside a figure. In this case, the adhesive tape is provided so as to extend in the width direction of the plate material 5 (short direction of the plate material 5), and the adhesive tape is adhered to the plate material 5 and the side edge surface 21 of the flange 2, and both ends of the adhesive tape are attached to one side. The adhesive tape is attached so as to cover the side edge surface 21 of one flange 2 of the H-section steel 1 and the side edge surface 51 of the plate 5 by bonding to the back surface 22; 22 (see FIG. 2) of the flange 2 of Alternatively, the adhesive tape may be provided so as to extend along the side edge surface 21 of one flange 2 of the H-section steel 1 and the adhesive tape is bonded so as to straddle the plate material 5 and the flange 2. You may attach an adhesive tape so that the side edge surface 21 of the one flange 2 of the shape steel 1 and the side edge surface 51 of the board | plate material 5 may be covered.
In the second embodiment, the H-steel with plate 6 is placed in the soil cement column 8 so that the soil cement 7 does not enter between the plate 5 and the surface 4 of one flange 2 of the H-section steel 1. Attach an adhesive tape (not shown) so as to cover the outer surface 42 (see FIG. 6) of the plate material 41 and the side edge surface 51 (see FIG. 6) of the plate material 5 so that the plate material 5 does not shift or come off when building. Thus, the plate material 5 and the plate material 41 may be attached to one flange 2 so as to cover the surface 4 of the one flange 2. Also in this case, the adhesive tape is provided so as to extend in the width direction of the plate material 5, the adhesive tape is adhered to the outer surface 42 of the plate material 5 and the plate material 41, and both ends of the adhesive tape are attached to the back surface 22 of the one flange 2; 22 (see FIG. 6), an adhesive tape may be attached so as to cover the outer surface 42 of the plate material 41 and the side edge surface 51 of the plate material 5, and the adhesive tape is attached to one of the H-section steel 1. The outer surface 42 of the plate 41 is provided by extending along the side edge surface 21 of the flange 2 and bonding the adhesive tape so as to straddle the outer surface 42 of the plate 5 and the plate 41 and the rear surface 22 of the flange 2. An adhesive tape may be attached so as to cover the side edge surface 51 of the plate member 5.

The core material may be a shape steel such as an I-shaped steel or a grooved steel.
Further, when the coating material is peeled from the surface 4 of one flange 2 of the H-section steel 1 after the soil cement 7 is hardened, the coating material is attached to the surface 13 opposite to the surface 12 facing the surface 4. Any sheet-like or film-like one may be used as long as it has the strength to peel the cement 71 from the soil cement pillar 8.

1 H-section steel (core material) 4 Surface of one flange 5 Plate material (coating material),
6 H-shaped steel with plate material (core material with covering material), 7; 70; 71; 72 soil cement,
8 soil cement pillars, 9 ground, 11 pillar rows, 12; 13 faces, 100 mountain retaining wall.

Claims (1)

Form a column of soil cement columns on the ground, build H-shaped steel in each soil cement column of the column column, and after the soil cement of the column column has hardened, root the ground surrounded by the column column In addition, in the method of constructing a retaining wall in which the surface of one flange of the H-shaped steel is exposed by removing the soil cement on the root cutting side of the column row,
After the H-shaped steel with the veneer plate in which the veneer covering the surface is bonded to the surface of one flange of the H-shaped steel is built in the unhardened soil cement column, and the soil cement in the soil cement column is hardened Root the ground surrounded by the column of soil cement columns , and a flat plate with one edge sharply formed between the upper edge of the plywood plate and the surface of one flange of the H-section steel from the sharp edge it intends to insert a method of Ru to expose the surface of one of the flanges of the H-shaped steel by going peeled the veneer away from the surface of one flange of the H-shaped steel from one side,
As the veneer plate, when the soil cement is hardened and peeled off from the surface of one flange of the H-shaped steel, the soil cement adhered to the surface opposite to the surface facing the one flange of the H-shaped steel. A method for constructing a retaining wall characterized by using a material having strength to peel from a soil cement column .

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