JP2000328577A - Soil retaining cage frame and method of building steep grade banking using the cage frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably fix a cage frame forming a slope of steep grade banking on a ground and also easily performing the fixing. SOLUTION: A sheet-shaped reinforcing material is locked to the bottom surface of an L-shaped front net body A formed of a bottom part and a front surface part using the mesh spaces of the reinforcement material and the hook- shaped engagement part of the front net body A, and laid down at the rearward from the rear end part of the cage frame where the rear end part of the reinforcement material is formed of the net bodies A and B extensively to a position at least 0.5 times the depth of the cage frame. In addition, a small hole-shaped engagement part for the L-shaped rear part net body B formed of the bottom part and a rear surface part is erectedly engaged, on the reinforcement material, with the hook-shaped engagement part of the front part net body A, and an end part net plate is installed at both ends of the side surfaces. Soil and sand are filled in the soil retaining cage frame to form a slope, and soil and sand are built up to that height to build a first stage of banking with buried reinforcement material. This operation is repeated in order so as to build a multiple stage banking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth retaining cage frame for stably embedding a steep embankment in multiple stages and stably fixing the formed steep slope. More specifically, an earth retaining cage frame which forms a slope and a reinforcing member for stably installing the earth retaining cage frame on the ground, and which can easily perform the anchoring cage frame, and Construction method of steep embankment using.

[0002]

2. Description of the Related Art In order to construct roads and residential land, and to construct valleys, seawalls and dams, the slopes of the hillsides are cut open.
Construction work (wall work) to build a vertical or steep slope is being performed. The wall works must be stable to withstand natural disasters such as floods and landslides after construction and have no risk of collapse. Various construction methods have been proposed as a method for constructing a steep embankment, such as a winding type using geotextile, a gabion type in which a cage is filled with earth and sand, a panel type, and a PC concrete block type.

[0003] Among the above-mentioned types, the gabion type arranges a rectangular cage frame at a position to be a slope on the prepared ground, fills it with earth and sand, and compacts it. Arrange the car frame group, then pile up earth and sand on the rear part of the car frame to the same height as the car frame, complete the first embankment construction,
This work is repeated in order toward the top to build a steep embankment. In this gabion type with a car frame, the car frame must be firmly fixed to the ground so that the car frame itself does not collapse. As a method for this purpose, the bottom of the car frame and a reinforcing material such as a geogrid or geotextile embedded in the ground are joined to prevent the car frame from collapsing due to a frictional force between the reinforcing material and the ground.

[Problems to be solved by the invention]

[0004] However, since the mounting of the car frame and the reinforcing material is performed at the site of embankment construction, it must be a simple method, and a strong force is applied to the car frame and the reinforcing material when filling the stone or the earth and sand. As such, this should not cause the stiffener to fall out of the car frame or be laid out of position. Up to now, it has been extremely difficult to easily attach a reinforcing material to a construction site while maintaining a certain strength. For example, the method of tying the bottom of a cage frame filled with earth and sand and a reinforcing material laid on the ground with a rope, a wire, or the like requires a complicated work on site.

[0005] The inventors of the present invention have studied a method for solving the above-mentioned problems, and as a result, have used a pair of meshes connected to each other to form a car frame. By simultaneously forming and attaching the reinforcement with the same engaging portion, the car frame and the reinforcement can be attached in a simple manner on site, and a stable slope without collapse is built. We found a structure of a retaining cage frame that can be used and a method of constructing a steep embankment using it.

[Means for Solving the Problems]

That is, according to the present invention, a sheet-like reinforcing material is provided on a bottom surface of a front net A having an L-shaped cross section, which comprises a bottom net and a front vertical net, and has a hook-shaped engaging portion at the bottom. A small hole-shaped engaging portion provided in the mesh space of the reinforcing member or the reinforcing member and the front net body A.
And the rear end of the reinforcing material is at least 0.5 times the depth of the car frame behind the rear end of the car frame formed by the nets A and B. laid and extended to Do that position, further on to the reinforcing material consists of a bottom grid plate and rear vertical portions network board, the rear network element B of the L-shaped section having a small hole-like engaging portion on the bottom This is an earth retaining cage frame which is engaged with the hook-shaped engagement portion of the front net body A and has end net plates attached to both side ends.

The present invention also relates to a method of constructing a steep embankment using the retaining cage frame, the method comprising a bottom net plate and a front vertical net plate, a hook-shaped engaging portion and a small hole. Using a pair of L-shaped nets A and B, which can be engaged with each other by a pair of engagement portions to form the bottom of the car frame and the front and rear vertical portions, from the bottom net and the front vertical net. A sheet-like reinforcing material is provided on the bottom surface of a front net A having an L-shaped cross section having a hook-shaped engaging portion, and a rear end of the reinforcing material is formed by a net A, B of a cage frame. Behind the rear edge, at least 0.5 of the car frame depth
It is laid so as to extend to the position where it is doubled, and both are locked by the mesh space of the reinforcing material or the small hole provided in the reinforcing material and the hook-shaped engaging portion of the front net A, and then the small hole-shaped engaging A rear net B having an L-shaped cross section is erected on a reinforcing material, is locked to the front net A by a hook-shaped engaging portion of the front net A, and then end nets are provided at both ends. Attach the board, form a cage with the reinforcement fixedly laid at the bottom and its rear extension, fill the cage with earth and sand to form the slope, and then fill the cage with the earth at the rear. It consists of building up the first-stage embankment by stacking up to the height of the car frame, and repeating this operation sequentially to build up the multi-stage embankment.

BEST MODE FOR CARRYING OUT THE INVENTION

One example of the earth retaining cage frame with reinforcing material of the present invention will be described with reference to the drawings. FIG. 1 shows a front net A and a rear net B forming a car frame. The front net is composed of a bottom net 2 and a front vertical net 3, and has an L-shaped cross section by both nets. Has become. A hook-shaped engaging portion 4 is provided on the bottom portion 2.
On the other hand, the rear net B is also a net having an L-shaped cross section composed of a bottom net 5 and a rear vertical net 6, and the bottom 5 has a small hole which engages with the hook-shaped engaging portion of the front net. An engagement portion 7 is provided.
The front net A and the rear net B form a pair, and the two are locked by engaging portions, so that the bottoms 2, 5,
The car frame 1 having the front vertical portion 3, the rear vertical portion 6, and the side end net plate 9 is formed. As a material of the netting, a welding wire mesh or an iron wire wire mesh (futon cage) is used.

In the present invention, as shown in FIG. 2, a sheet-like reinforcing material C is attached to the bottom of the car frame.
In FIG. 2, the reinforcing material of the portion laid so as to overlap with the bottom of the car frame is omitted, but as shown in the cross-sectional view of FIG. 3, on the bottom surface of the front net A having the hook-shaped engaging portions, A sheet-like reinforcing material C is fixedly laid by engagement with the hook-shaped engaging portion of the front netting A, and a rear netting B having a small hole engaging portion at the bottom is erected thereon. Furthermore obtained by mounting the edge network plate 9 on the side surface at both ends, the reinforcing member rear end 11 is further from the rear end portion 12 of the car frame bottom, a structure having a portion C ₂ that extends to the rear of the car frame Has become.

The sheet-like reinforcing material is not particularly limited as long as it is embedded in the ground and generates a fixing force with the ground by friction. A plastic net called geogrid or a metal net, for example, Nonwoven fabrics, woven fabrics, such as steel nets and geotextiles
Any of a nonwoven fabric and a plastic sheet, a laminate of a nonwoven fabric and a plastic net, and the like can be used. However, in the case of a net, the mesh space 8 can be used as it is as an engagement portion with the net A, A geogrid is more preferred because it is not necessary to drill small holes for engagement, and a plastic mesh is particularly preferred.

FIG. 3 is a cross-sectional view of a car frame with a reinforcing member when a geogrid is used as the reinforcing member. The attachment between the net A and the reinforcing member C is locked by the hook-shaped engaging portion 4 of the front net A and the mesh space 8 (FIG. 4) of the reinforcing member. If the reinforcing material is a non-reticulated sheet such as a non-woven fabric or a woven fabric, the net A
It is necessary to make a small hole for engaging with the hook-shaped engaging portion of.

The reinforcement is attached to the bottom of the car frame,
By the reinforcing material is embedded in the ground, strongly fixed to the ground, there is a role of preventing the collapse of the embankment, not bottom the overlapping part C ₁ only, behind the rear end of the car frame bottom ( it is necessary to have a part C ₂ that extends to the opposite side) and slopes. In the present invention, the mesh member A, the length d ₂ from the rear end portion 12 of the car frame, which is formed by B to the rear end 11 of the reinforcing member, the depth d ₁ of the car frame at least 0.5
The reinforcing material is laid so as to reach a length of at least 2.0 times, preferably at least 2.0 times.

The front end (slope side) of the reinforcing material is bent up to the full front surface (slope) of the car frame or upward at the slope portion, and partially overlaps with the vertical net plate of the net A. It is desirable to strengthen the bonding between the net A and the reinforcing material, but it is also possible to set the mesh A behind the slope.

On the reinforcing material laid on the net A, a net B having a small hole-shaped engaging portion at the bottom is erected as shown in FIG. By engaging with the mating portion and further attaching the end net plates 9 to both side ends, the earth retaining cage frame with the reinforcing material of the present invention is formed. As the small hole-shaped engaging portion of the net body B, a ring-shaped one, a thin plate having a round hole, or the like is used.

The earth retaining cage frame assembled from the net A, the net B, the reinforcing material, and the side end net plate in this manner,
The upper part is a rectangular car frame that is open only, and a steep slope can be constructed by filling the inside thereof with stones 18 such as stones and earth and sand. After the earth and stones are filled, the upper net plate 10 may be attached as needed.

By using the earth retaining cage frame with the reinforcing material, a steep embankment can be easily constructed. The construction method of the steep embankment will be described with reference to FIGS.

First, the first-stage construction ground is maintained. A foundation laying material, a drainage material, and the like are laid on the ground base 13 as necessary.

The car frame is assembled and the reinforcing material is mounted on the ground base. That is, the front net A having the hook-shaped engaging portion at the base is first arranged so that the vertical surface 3 becomes the slope 14.

In order to facilitate the manufacture, transportation, and construction of the car frame, the car frame is usually a fixed-size unit basket, which is arranged in a large number in the width direction. The units are arranged side by side so that the vertical plane is the slope.

When a large number of net units are arranged side by side in the width direction, it is necessary to connect them in order to increase the overall strength and prevent partial collapse. As a method of joining, units of adjacent nets are overlapped with a small width w, and both are directly connected by an appropriate means, for example, a connecting material, or are connected to the net B to form a car frame. Horizontal connecting members 15 for reinforcement as described later in the overlapped portion
Or the skew connecting member 16 may be passed.

The sizes of the nets A, B and the end face net plate constituting the car frame are 500 widths as the size of the car frame after assembly.
Approximately 1000 to 2000 mm, particularly 1000 to 2000 mm, depth 500 to 3000 mm, particularly 800 to 1200 mm, height 300 to 1000 mm, and particularly preferably 500 to 1000 mm. The depth of the assembled car frame is the sum of the distances between the vertical mesh plates of the nets A and B and the engaging portions, and the nets A and B are so arranged that the depth of the car frame has the above dimensions. The size of the net A may be appropriately selected. However, it is more stable and easy to perform the work if the depth of the net A placed on the lower side usually occupies all or most of the depth of the entire car frame. The width w of the overlapping portion in the width direction between the units is preferably about 100 to 500 mm.

The mesh size of the net on each side forming the car frame is 25 to 300 mm, especially 50 to 200 mm.
Is preferred. When a geogrid is used as the reinforcing material, the size of the mesh of the net is preferably 1 to 1000, particularly preferably 5 to 300 mm.

After the units of the front net A are arranged, a sheet-like reinforcing material C is laid thereon and attached to the front net A. As shown in FIG. 4, the mounting method is such that the hook-shaped engaging portion 4 of the front net body A and the mesh space 8 of the reinforcing material or the small holes provided in the sheet-like reinforcing material are locked. If the reinforcing material is a net-like material such as a geogrid, it can be locked by the mesh space. However, if the reinforcing material is a sheet-like material such as a non-woven fabric or a woven fabric, the hook-like engaging portion of the net A is engaged. Drill small holes. Even when a net-like reinforcing material is used, a small hole for engagement can be separately provided.

The net-shaped or sheet-shaped reinforcing material has a length d ₂ of a portion C ₂ extending rearward from the rear end 12 of the cage frame, the rear end 11 of which is formed by the nets A and B. , At least 0.5 times the depth d ₁ of the car frame, preferably 2.
Lay it to reach the position where it becomes 0 times or more.

The end of the reinforcing material on the side of the slope is bent up to or at the slope of the car frame so as to partially overlap the vertical portion of the front net A. Although it is desirable to strengthen the adhesion between the front net A and the reinforcing material,
It may be placed behind the slope.

Next, the rear net B having the small hole engaging portion is erected on the reinforcing material, and is locked by the small hole engaging portion and the hook-like engaging portion of the front net A. As a result, the front net A, the reinforcing member C, and the rear net B are engaged, and the car frame 1 in which a number of units are connected left and right is formed. To reinforce the car frame, pass the horizontal connecting material 15 to the top of both front and rear vertical parts,
In addition, it is preferable that the skewed connecting members 16 are passed and fixed at appropriate intervals above and below both vertical portions.

Finally, end net plates 9 are attached to both ends. Thus, a car frame 1 having a cross section of FIG. 3 is formed in which the reinforcing material is fixedly laid so as to extend to the bottom and the rear thereof.

Since the reinforcing material C is locked by the hook-shaped engaging portions of the front net A and is sandwiched between the front net A and the rear net B, before the sand is filled into the car frame. However, it is held at a certain strength in the basket frame and sufficiently withstands the pressure due to earth and sand filling,
There is no risk of deviating or shifting. After the cage is filled with earth and sand and is compacted, the cage is strongly fixed by the frictional force with the earth and sand in the cage, and the reinforcing material functions effectively.

When filling the earth and sand, the inside of the front and side surfaces of the car frame is covered with a vegetation sheet 17 so as to prevent the earth and sand from spilling from the car frame, and then the earth and sand 18 are filled in the car frame. Filling is usually performed using a machine such as a manual or power shovel, backhoe.

The earth and sand are filled up to the upper surface of the car frame and rolled by a rammer or the like, thereby completing the construction of the slope with the car frame filled with earth and sand. An upper net plate 10 may be mounted thereon as required.

Next, earth and sand are piled up to the height of the car frame on the rear part of the car frame, and are sufficiently compacted by rollers or the like.
As a result, a flat land on which the slope is formed by the car frame is created, and the first-stage embankment 19 is constructed. Further, since the reinforcing member extending to the rear of the car frame and attached to the bottom of the car frame is buried in the ground, the slope is stabilized by the anchor effect due to the frictional force with the ground.

The operations performed in the first step are sequentially and repeatedly piled up on the flat ground thus constructed to construct a multi-stage embankment. At this time, the position of the upper normal line 20 is on the lower normal line 21 or at a position behind the lower normal line 21.

[0033]

The earthing cage frame with the reinforcing material of the present invention can assemble a pair of L-shaped nets A and B and the reinforcing material by a simple joining method, and the pressure at the time of filling the earth and sand is improved. Therefore, the reinforcing member is sandwiched between the nets A and B constituting the car frame without being disengaged or displaced, and strongly joined together by three members, and can be used on a steep slope. In addition, in the method of constructing a steep embankment of the present invention using this, the reinforcing material attached to the car frame is embedded in the ground, and the slope formed by the car frame is formed by an anchoring effect due to frictional force with the ground. It is located stably and has no risk of collapse due to natural disasters such as floods and landslides. And joining the car frame / reinforcement,
Since the formation of the car frame by the connection of the nets A / B is simultaneously performed by one engaging portion, the construction is simple and the structure of each member is also simple. Further, since the car frame is divided, stacking is possible, and transport to the construction site is easy.

[Brief description of the drawings]

FIG. 1 shows a sketch of a front net A and a rear net B forming a retaining cage frame of the present invention.

FIG. 2 shows a sketch of a retaining cage frame of the present invention with a stiffener attached.

FIG. 3 shows a cross-sectional view of the earth retaining cage frame of the present invention with the reinforcement attached.

FIG. 4 is a diagram showing a method of assembling a front net A, a reinforcing member, and a rear net B.

FIG. 5 shows a method of constructing a steep embankment using the retaining cage frame of the present invention.

[Explanation of symbols]

 Reference Signs List A front net B rear net C reinforcing material 1 cage frame 2 bottom net plate 3 front vertical net plate 4 hook-shaped engaging portion 5 bottom net plate 6 rear vertical net plate 7 small hole engaging portion 8 mesh Space 9 Side edge net plate 10 Upper net plate 11 Reinforcement rear end 12 Car frame rear end 13 Ground base 14 Slope 15 Horizontal connection material 16 Slanting connection material 17 Vegetation sheet 18 Filling in the cage frame 19 Construction Embankment 20 Hojiri Line 21 Hojiri Line

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Atsushi Nishimura 3-10-10 Yushima, Bunkyo-ku, Tokyo Mitsui Ishi Chemicals Co., Ltd. F-term (reference) 2D044 CA04 DB41

Claims (3)

[Claims] 1. A sheet-like reinforcing material is provided on a bottom surface of a front net A having an L-shaped cross section, comprising a bottom net and a front vertical net, and having a hook-shaped engaging portion at the bottom. The meshed space of the material or the small hole-shaped engaging portion provided in the reinforcing material is locked by the hook-shaped engaging portion of the front net A, and the rear end of the reinforcing material is formed by the nets A and B. Behind the rear end of the car frame, extend it to a position at least 0.5 times the depth of the car frame, lay it, and further on the reinforcing material, a bottom net plate and a rear vertical net plate A rear net B having an L-shaped cross section having a small hole-shaped engaging portion at the bottom is engaged with the hook-shaped engaging portion of the front net A, and end net plates are attached to both side ends. An earth retaining basket frame. 2. The retaining cage frame according to claim 1, wherein the sheet-like reinforcing material is a geogrid or a geotextile. 3. A bottom mesh plate and a front vertical mesh plate which can be engaged with each other by a hook-shaped engaging portion and a small hole engaging portion to form a bottom portion of the car frame and both front and rear vertical portions. Using a pair of L-shaped nets A and B, consisting of a bottom net and a front vertical net, on the bottom surface of the L-shaped front net A having a hook-shaped engaging portion, A sheet-like reinforcing material, the rear end of the reinforcing material is a net A,
B, extending rearward from the rear end of the car frame formed by B to a position at least 0.5 times the depth of the car frame, and piercing the mesh space of the reinforcing material or a small hole provided in the reinforcing material. Both hooks are locked by the hook-shaped engaging portion of the front net A, and then a rear net B having an L-shaped cross section having a small hole-shaped engaging portion is erected on the reinforcing material, and the front net A The hooks engage with the front net A, and then end net plates are attached to both ends to form a cage frame in which the reinforcing material is fixedly laid at the bottom and its rear extension, Fill the basket frame with earth and sand to form a slope,
A method of constructing a steep embankment, comprising stacking earth and sand up to the height of the car frame on the rear portion of the car frame to construct a first-stage embankment, and sequentially repeating this operation to construct a multi-stage embankment.