JPH0641994A - Surface formation method for steep embankment - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The surface of steep embankment is made concrete to prevent surface deterioration. [Constitution] When anchor material 3 such as a geogrid is laid in layers to form a steep embankment, a vertical beam 1 is applied to the embankment surface.
After the vertical beam is tightly connected to the anchor material, a formwork is attached to the vertical beam and concrete or mortar is placed in the space between the embankment surface and the formwork to form the embankment surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a steep slope surface.

[0002]

2. Description of the Related Art Recently, in order to form a steep slope as steep as possible and to stabilize it, recently, a sheet-like anchor material having a large tensile strength is embedded in a plurality of layers in the embankment and the space between the embankment and the anchor material is increased. A method is used in which the anchor material is fixed in the embankment by the frictional force that acts on the slope, and the tensile force of the anchor material counters the sliding failure force on the slope to prevent the sliding failure on the slope. One of the major problems with such steep embankments is how to protect their surface.

In many cases, a net-like material made of synthetic fiber or synthetic resin is used as an anchor material, and a method of using such a material as an anchor material and winding the extended portion thereof on the surface of the embankment is adopted. This kind of material is flammable, and from the viewpoint of deterioration by ultraviolet rays, it is dangerous to use the anchor material as it is exposed, especially when the steep slope embankment is a permanent structure.

[0004]

In order to solve such a problem, a concrete wall is erected on the front surface of the embankment, and the tensile strength is set so as to maintain a constant space between the wall and the embankment surface. A method of forming a bank surface by placing concrete or mortar in this space is also developed. However, since concrete pressure is applied to the wall body, it must be firmly connected to the embankment surface. However, the embankment surface does not have sufficient strength, and it is very difficult to finish the wall body into a flat surface.

[0005]

The present invention has been made to solve the above problems, and a plurality of vertical beams are erected at predetermined intervals on the surface of the embankment, and the vertical beams are used as anchor materials. The mold is attached so as to provide a space of a predetermined width between the vertical beams directly or indirectly between the vertical beams, and then concrete or mortar is placed in the space.

[0006]

Since the present invention is constructed as described above, since the vertical beam is tightly bound to the anchor material, it is sufficiently tightly tied to the embankment. A clean surface can be formed by mounting a mold on the basis of the vertical beams, adjusting the surface of the mold so that the surface is flat, and then pouring concrete.

[0007]

Embodiment 1 An embodiment of the present invention will be described in detail below with reference to the drawings. The vertical beam 1 is shown in FIG. 3m thick
The cross section made of galvanized steel sheet of m is a hat-shaped semi-cylindrical long material consisting of bottom surface 11, side surface 12 and locking edge 13, and the bottom surface 11 is located at a place corresponding to the height of the anchor material of the embankment. A binding hole 14 is provided. The locking edge 13 is provided with screw holes 15 at intervals of 30 cm. An opening 16 is provided on one surface.

FIG. 3 shows a connector 2 for tightly connecting the anchor material and the vertical beam. It is made of a galvanized steel sheet having a thickness of 3 mm and has an angle of 1 m, and one side edge is bent at a right angle to form an angle portion 21. A connection hole 22 is attached to the vertical surface. A large number of downwardly bent locking projections 23 are attached to the side edge on the opposite side, and are formed so as to be inserted into the mesh of the planar anchor material.

As shown in FIG. 1, in the case of construction, a planar anchor material 3 generally called a geogrid is embedded in layers to form a vertical embankment 4. The planar anchor material 3 is bent upward at the tip of the embankment, and the sandbag 31 placed at the tip of the embankment is rolled up and folded back into the embankment 4 to form the embankment surface 41. The connecting tool 2 is installed so that the planar anchor material 3 embedded in each layer of the embankment 4 is pressed near the surface of the embankment, and the locking projection 23 is provided on the planar anchor material 3.
Insert it into the mesh and connect. The tightening bolt 51 passing through the connecting hole 22 of the angle portion 21 is projected from the embankment surface 41. The vertical beam 1 is erected at a location apart from the embankment surface 41 by the concrete thickness. A nut 52 is screwed into the tightening bolt 51 projecting on the embankment surface 41, and the tightening hole 14 of the bottom surface 11 of the vertical beam is passed through the bolt 52, and the position of the vertical beam 1 is determined by adjusting the nut 52. The vertical beam 1 is fixed at a predetermined position in the opening 16 by using a restraining nut 53.

As shown in FIG. 4, a rope mesh 54 is installed so as to be parallel to the embankment surface 41. The steel mesh 54 may be fixed to the embankment surface 41 with anchor pins 55 in places. Next, the control panel 56 for the primary placement is installed inside the locking edge 13 of the vertical beam 1. From the screw hole 15 provided in the locking edge 13 to the screw 57
Stop. After the control panel is fixed, concrete 6 is placed in the space between the embankment surface 41 and the control panel 56. After the first-placement concrete is hardened, a joint material is laid and the same operation as described above is repeated to form the surface layer of the concrete 6 on the entire embankment surface 41. After the entire concrete 6 is hardened, the screws 57 fixing the holding nut 53 and the control panel in the opening 16 of the vertical beam 1 are removed, and the vertical beam 1 and the control panel 56 are disassembled. The groove formed at the place where the vertical beam 1 was arranged is demolded and then repaired with mortar to finish it smooth.

[0011]

[Embodiment 2] As the vertical beam 1, one having substantially the same shape and size as the previous embodiment is used. The connector 2 is also the same as that of the previous embodiment. However, the angle portion 21 and the locking projection 23 are attached to the same side. As shown in Fig. 5, when constructing, a small-scale concrete foundation 60 is added to the slope of the embankment plan.
And the vertical beam 1 is erected vertically on it. Embankment base 4
The planar anchor material 3 is laid at 0. The planar anchor 3 is cut at the tip of the embankment, and the engaging projection 23 is inserted into the mesh at the tip to attach the connector 2. The tightening bolt 51 that has passed through the connection hole 22 of the angle portion 21 of the connection tool 2 is attached to the bottom surface 1 of the vertical beam 1.
The vertical beam 1 and the anchor material 3 are tightly connected to each other through the tightening hole 14 of the vertical beam 1 in the opening 16 of the vertical beam 1 by using the restraining nut 53.

On both side surfaces 12 of the vertical beam 1, engaging edges 13 and 2 are provided.
An angle-shaped auxiliary edge 17 formed by plastic extrusion is attached with a parallel spacing of cm, and an insertion groove 18 is formed. A dam plate 32 made of expanded metal is inserted between the adjacent insertion grooves 18 of the adjacent vertical beams 1 to the planned height of the first embankment. After the fine sealing sheet 33 is attached to the inside of the barrier plate 32, the first embankment 4 is performed. Work carefully using a brace so that the vertical beam 1 does not tilt outward. Similar operations are repeated, such as laying a sheet-like anchor material 3 on the primary embankment 4, tying it to the vertical beam 1 with a connecting tool 2, and embankment 4. If the vertical beam 1 is inclined outward due to the earth pressure of the embankment 4, the holding nut 53 is tightened more strongly so that the vertical beam is maintained. For this reason, the tightening bolts 51 are long ones with some margin left in advance. By repeating such work, the vertical embankment 4 is formed.

The vertical embankment formed in this way is not suitable for permanent structures because both the vertical beams and the dam plate rust with iron products, so the surface is covered with a thin mortar layer with a thickness of about 3 cm. Is. As shown in FIG. 6, a discarding mold 7 made of a thin plate of extruded cement is used. The plate has a thickness of 15 mm, a width of 30 cm, and a length of 120 cm, and the edges are provided with laterally stacked intermeshing portions 71, and the back surface is provided with several ribs 72 having a wall thickness of 15 mm in the longitudinal direction also for reinforcement. The rib 72 is capable of biting the mortar and is bent upward so as to improve the flow of the mortar. To attach the discard mold 7 to the vertical beam 1, as shown in the figure, both ends of the discard mold 7, the vertical beam 1
At the place where it is attached to the upper part of the rib 72, the small piece of wood 73 that also serves as a spacer is projected on the rear surface of the rib 72 so that the screw 19
Stop. After the discarding molds 7 are stacked and installed, the small pieces 73 are fixed to the locking edge 13 of the vertical beam 1 with the screws 19. When stacking the discarding forms, a cushioning plate 74 made of foamed resin is sandwiched between the two. The same applies to the vertical joints. After the mold is fixed, the mortar 8 is poured into the space between the barrier plate 32 and the discard mold 7.

The anchor material used in the present invention is not limited to the planar material described in the embodiments, but may be a band-shaped anchor material or a linear anchor material. Further, the slope of the embankment may not be vertical and may be a slope of 3 minutes or 5 minutes.

[0015]

The present invention can obtain the following effects. (1) Since the vertical beam is firmly connected to the anchor material,
The surface material can be held securely. (2) By adjusting the binding material of the vertical beam, the slope can be adjusted while performing the embankment work, so that a predetermined slope can be secured. (3) Since the formwork, which is indispensable for placing concrete or mortar, can be attached to the vertically-arranged vertical beam with high accuracy, it is easy to install and it is easy to secure a flat surface. (4) The anchor material on the surface of the embankment, steel dam plate, vertical beam, etc. are extremely excellent in terms of cost and strength, but they are not suitable for permanent structures due to UV deterioration, combustion, rust, etc. There is a face. According to the present invention, such drawbacks are eliminated because it is protected by mortar and concrete.

[Brief description of drawings]

FIG. 1 is an explanatory view of a formation state of a surface of an embankment viewed from a side surface.

FIG. 2 is a perspective view of a vertical beam.

FIG. 3 is a perspective view of a connector.

FIG. 4 is an explanatory view of the formation state of the embankment surface as seen from above.

FIG. 5 is an explanatory view of another formation state of the embankment surface as seen from the side surface.

FIG. 6 is an explanatory view of another state of forming the embankment surface as seen from the side surface.

Claims (3)

[Claims] 1. In the construction of a steep slope embankment formed by embedding an anchor material having a high tensile strength substantially horizontally in the embankment,
A plurality of vertical beams are erected vertically at predetermined intervals along the slope, and the vertical beams and the anchor members are tightly connected to each other, directly or indirectly between the vertical beams and the vertical beams, and with the embankment. A method for forming a surface of a steep slope embankment, characterized in that a formwork is attached so as to provide a space of a predetermined thickness, and then mortar or concrete is placed in the space. 2. In the construction of a steep slope embankment formed by embedding an anchor material having a large tensile strength substantially horizontally in the embankment,
A plurality of vertical beams are erected at a predetermined interval so as to project above the existing embankment surface in the vertical direction, and after the vertical beams are tightly connected to the anchor material, a weir plate is attached to the projecting portions of the vertical beams. Install and perform embankment work on the existing embankment, then install the formwork so as to provide a space of a predetermined thickness between the vertical beams and directly or indirectly between the vertical beams, and then A method for forming a steep slope embankment surface, which comprises placing mortar or concrete in the space. 3. The vertical beam is a semi-cylindrical object having a substantially U-shaped cross-section whose bottom surface faces the embankment surface,
The method for forming a surface of a steep slope embankment according to claim 1 or 2.