JP2002339363A - Banking reinforcing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a banking reinforcing structure in which there is no oxidation corrosion in the case of use for a prolonged term and deterioration by ultraviolet rays, the fear of burning by an open burning or the like is not required and a retaining wall for a banking can be maintained under a stable state for the prolonged term. SOLUTION: The banking is reinforced by a concrete panel 2 constituting the retaining wall 1, covering the slope face of the banking and a tail body 4 connected to the rear of the concrete panel 2 and laid in an oblong posture in the banking. The tail body 4 is formed of a beltlike net made of plastics. One end of the tail body 4 is engaged and connected to a connecting groove 8 formed to the rear of the concrete panel 2 through a connector 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embankment reinforcing structure used in a reinforcing embankment method.

[0002]

2. Description of the Related Art As a conventional reinforcing embankment method, there are known a tail army method, a tas method, a three-R method (all of which are called method names). The tail armer method consists of a concrete panel and a plurality of tail bodies connected to the connection metal fittings on the back with bolts as embankment reinforcement elements.The tail body is laid in the embankment, and the slope is made of concrete panels. By covering, the embankment is held stably. The tail body there is made of a long strip of steel, and ribs for increasing frictional resistance are provided on the surface thereof at regular intervals.

The tas method is basically the same as the tail arm method, except that a tail body formed of a plurality of steel rods is connected to a concrete panel so as to be slidable up and down via slide fittings. The point that the tail body can move down following the land subsidence is different from the tail army method. If necessary, an anchor plate may be fixed to the tip of the tail body to enhance the resistance of the tail body to escape from the embankment. By the way, in the tail army method, the tail body is bent and deformed to absorb the land subsidence of the embankment.

[0004] The three-R method is described in, for example, Japanese Patent Application Laid-Open No. 7-1974.
No. 70 can be seen. In this case, a tail body is formed by a plastic net, and a slope covering material made of a sandbag or expanded metal is used as a retaining wall material instead of a concrete panel. In this method, after the tail body is laid, the sandbag is wrapped with the tail body on the slope, the end wrapped around the back of the sandbag is laid on the embankment, and the tail body and the sandbag are fixed with the embankment.

[0005]

As described above, the conventional reinforcing embankment method has several forms depending on the difference of the embankment reinforcing elements, and each has its own features but also has disadvantages. In the tail armer method and the tas method, the tail body laid in the embankment is formed of a steel strip or a steel rod, so that oxidative corrosion of the metal material in the embankment cannot be avoided, and a long term of 50 to 100 years There is a problem in durability during use. In this respect, the three-R method in which the tail body is formed by a plastic net has no room for oxidation or corrosion of the tail body laid in the embankment, and is excellent in long-term durability. Furthermore, since the tail body can be carried into a construction site in a rolled state and cut to a required length at the site, there is an advantage that transportation and material management are facilitated.

However, in the Three-R method, since the tail covering the sandbag is exposed on the slope of the retaining wall, the exposed portion of the tail may be deteriorated by receiving ultraviolet rays. Moreover, when weeds growing on the slopes are removed by open burning, there have been reported some accidents in which the tail bodies are burnt out, the sandbags are exposed, and the strength of the retaining wall is significantly impaired.

An object of the present invention is to maintain the retaining wall of the embankment in a stable state for a long period of time without causing oxidative corrosion during long-term use or deterioration due to ultraviolet rays and without having to worry about burning due to open burning or the like. It is an object of the present invention to provide an embankment reinforcement structure that can be used. SUMMARY OF THE INVENTION An object of the present invention is to provide an embankment reinforcing structure in which the connection of the tail body at the construction site can be performed easily and quickly, and thus the embankment reinforcing work can be performed efficiently, and the construction cost can be reduced as much as the construction period can be reduced. It is in. An object of the present invention is to improve the load capacity per unit length of a tail body compared to a conventional tail body formed only of a net portion, and to reduce the amount of the tail body required for reinforcing the embankment by that much. To provide an embankment reinforcement structure that can save material costs. An object of the present invention is to provide an embankment reinforcing structure that can improve the shape reliability of a connecting groove provided in a concrete panel and that can smoothly and easily perform a connecting operation of inserting a connecting body into a connecting groove.
It is an object of the present invention to adjust and change the vertical position of the tail body so that the tail body can be properly laid on the embankment surface even when the height of the laid embankment surface varies, and accordingly, the tail laid on the embankment surface An object of the present invention is to provide an embankment reinforcing structure capable of always adjusting the variation in the body length.

[0008]

SUMMARY OF THE INVENTION An embankment reinforcing structure according to the present invention includes a concrete panel 2 which covers a slope of an embankment and forms a retaining wall 1 and is connected to a back surface of the concrete panel 2 so that the embankment is in a landscape orientation. And a tail body 4 to be laid. A connection groove 8 for connecting the tail body 4 is formed on the back surface of the concrete panel 2. The tail body 4 is formed of a band-shaped plastic net, and one end of the tail body 4 is engaged and connected to the connection groove 8 via the connection body 3. In addition,
The term “slope” as used in the present invention is a concept including both a case where the embankment side surface covered by the concrete panel is an inclined surface and a case where the side surface is a vertical surface.

Specifically, the tail portion 4 is provided with a net portion 20.
And a bar-shaped portion 21 crossing the net portion 20 in the width direction are formed alternately, and the bar-shaped portion 21 also serving as the connecting body 3 is fitted and connected to the horizontally long connecting groove 8 provided in the concrete panel 2. .

The connecting groove 8 is formed by a groove shaping tool 11 inserted and fixed to the concrete panel 2, and at least one end of the groove shaping tool 11 is opened on the peripheral surface of the concrete panel 2.

In the groove shaping tool 11, the connecting groove 8 is provided with a tail leading groove 16 opening on the back of the concrete panel 2.
And a main groove 17 that is formed to be wider than the tail lead-out groove 16 and that is continuous with the tail lead-out groove 16, and is formed in a groove shape.

As shown in FIG. 6, the connecting body 3 has a tail 4
And a connecting rod 27 substantially perpendicular to the horizontal frame 26. The connecting rod 27 is fitted and connected to the vertically long connecting groove 8 provided in the concrete panel 2. Can be.

[0013]

According to the present invention, the embankment is reinforced by the concrete panel 2 forming the retaining wall 1 of the embankment and the tail body 4 laid in the embankment, so that the plastic net is weakened against ultraviolet rays and heat. The tail body 4 was prevented from being exposed on the slope of the embankment. Therefore, the tail body is not oxidized and corroded during long-term use, which is inevitable in the conventional example in which the tail body is formed of a steel strip, a steel rod, or the like. The burning of the tail body 4 due to the above can be eliminated, and the retaining wall 1 of the embankment can be maintained in a stable state for a long time. Since the tail body 4 is engaged and connected to the concrete panel 2 via the connecting body 3, the tail body 4 can be quickly connected to the concrete panel 2 with less labor at the construction site. Work can be performed efficiently and construction costs can be reduced by the amount that can be completed in a shorter construction period. The tail body 4 can be connected to the concrete panel 2 by a simple operation of merely engaging and connecting the connecting body 3 to the connecting groove 8, and once connected, the tail body 4 is not removed from the concrete panel 2 with a clear intention. As long as there is no room for the tail body 4 and the concrete panel 2 to be separated, it is advantageous in that the connection state can be maintained in an extremely stable state as compared with the conventional example.

In the tail body 4 formed by alternately arranging the net portions 20 and the rod-shaped portions 21, the embankment enters the mesh space of the net portion 20, and the rod-shaped portion 20 increases the resistance of the tail body 4 to come off. The load capacity per unit length of the tail body 4 is improved as compared with the conventional tail body formed only by the net portion, and the usage amount of the tail body 4 required for reinforcing the embankment is reduced by that much, and the embankment is reduced. Material costs required for reinforcement work can be saved. Further, according to the embankment reinforcing structure in which the bar-shaped portion 21 is used as the connecting body 3 and the bar-shaped portion 21 is fitted and connected to the horizontally long connecting groove 8 provided in the concrete panel 2, when the connecting body 3 is separately prepared. In comparison, the number of components of the embankment reinforcement structure can be minimized, and also in this respect, the material cost required for the embankment reinforcement work can be reduced, and the overall cost required for the construction can be reduced.

When the connecting groove 8 is formed by the groove shaping tool 11 fixedly inserted into the concrete panel 2, variations in the shape and dimensions of the connecting groove 8 can be eliminated, and a part of the connecting groove 8 is missing after the concrete panel 2 is formed. Or the connection groove 8 is reliably prevented by the reinforcing action of the groove shaping tool 11 and the shape reliability of the connection groove 8 is improved. Furthermore, the frictional resistance of the connecting groove 8 can be reduced as much as possible by the metal groove shaping tool 11 as compared with the case where the connecting groove 8 is directly formed in the concrete panel 2. Can be performed smoothly and easily. Since at least one end of the groove shaping tool 11 opens on the peripheral surface of the concrete panel 2, the connecting body 3 only has to be inserted along the groove from the previous opening. Can be easily inserted and connected into the connection groove 8.

The connecting groove 8 includes a tail leading groove 16 which is opened on the back surface of the concrete panel 2 and a main groove 17 which is continuous with the tail leading groove 16 and is formed wider than the groove 16. By simply inserting the connecting body 3 into the connecting groove 8 and connecting it, the tail body 4 can be engaged and held so as not to come off, so that the connection structure between the tail body 4 and the concrete panel 2 can be simplified as compared with the conventional example. Also, material costs can be reduced.

The connecting body 3 is constituted by a horizontal frame 26 for capturing and fixing the leading end of the tail body 4 and a connecting rod 27 substantially perpendicular to the horizontal frame 26, and the connecting rod 27 is provided on the concrete panel 2. According to the embankment reinforcing structure fitted and connected to the connection groove 8 of the tail body 4, even when the height of the laid embankment surface varies, the vertical position of the tail body 4 can be adjusted and changed.
Can be properly laid on the embankment surface, the variation in the length of the tail body 4 laid on the embankment surface can be eliminated, and a reinforced embankment having strength as designed can be constructed.

[0018]

1 to 5 show an embodiment in which an embankment reinforcing structure according to the present invention is applied to a roadbed whose embankment side surface is vertical. In FIG. 2, the embankment reinforcement structure covers the slope and the retaining wall 1
And a tail body 4 connected to the back surface of the concrete panel 2 via a connecting body 3 and laid in a landscape orientation inside the embankment. In FIG. 2, reference numeral 5 denotes a base portion of the retaining wall 1, and reference numeral 6 denotes a concrete edge frame which is put on the upper end of the retaining wall 1. Although the concrete panel 2 of this embodiment is basically formed in a hexagonal shape, a trapezoidal concrete panel 2a is used in combination to straighten the upper and lower edges. Although not shown, a dedicated concrete panel or the like for shaping the entrance corner or the exit corner is also prepared.

In FIG. 3, the concrete panel 2 is a hexagonal panel which is longer in the horizontal direction and whose left and right sides are set to be longer than the other sides. The protruding portion 7 is provided, and a connecting groove 8 is provided along the longitudinal direction of the bulging portion 7. An engagement protrusion 9 is formed on the lower half peripheral surface of the concrete panel 2, and an engagement groove 10 for receiving the engagement protrusion 9 is formed on the upper half peripheral surface. In addition,
The diagonal length in the left-right direction of the concrete panel 2 shown in this embodiment is 1400 mm, the length of the upper and lower sides is 1200 mm, and the front and rear thickness including the bulging portion 7 is 220 mm.

The connecting groove 8 is made of a groove forming tool 11 made of stainless steel.
Is fixedly inserted into the concrete panel 2. As shown in FIG. 1, the groove shaping tool 11 includes a pair of upper and lower flange portions 12, an embedded piece 13 that is continuously bent to the inside of the panel at upper and lower ends of the flange portions 12, and a panel adjacent to each flange portion 12. From a left-right long strip-shaped press-formed product in which a horizontal first groove wall 14 that is bent inward and a circular second groove wall 15 that connects inner inner ends of the first groove wall 14 are integrally formed. Become. The tail guide groove 16 is defined by the upper and lower first groove walls 14, and the main groove 17 is defined by the second groove wall 15. The connecting grooves 8 are formed by these two grooves 16 and 17 to form a groove. . In order to prevent the tail body 4 attached to the main groove 17 from coming off, the diameter of the main groove 17 is set to be larger than the gap between the tail leading grooves 16.
The corner portion between the first groove wall 14 and the flange portion 12 is rounded into a semicircle to allow the tail body 4 to bend vertically. Both ends of the groove shaping tool 11 inserted and fixed to the concrete panel 2 are respectively opened on the peripheral side surface of the concrete panel 2, and the tail body 4 is connected from either the left or right side of the opening 18 as shown in FIG. 5. Groove 8
Can be inserted and connected.

In FIG. 4, the tail body 4 has a net portion 20.
And a bar-shaped plastic net formed by alternately forming rod-shaped portions 21 having a circular cross-section at regular intervals. The net is supplied in a state of being wound in a roll shape, and cut into a required length for use. The net portion 20 is formed in a lattice shape by a longitudinal net frame 22 in the longitudinal direction and a horizontal net frame 23 in the width direction. In order to increase the tensile strength in the longitudinal direction, the reinforcing core material 24 is provided inside the vertical mesh frame 22. Is buried. The rod-shaped portion 21 also serves as a connecting body 3 for connecting the tail body 4 to the concrete panel 2, and crosses the net portion 20 in the width direction so as to cross the net 20.
3 and placed in parallel. The dimensions of each part of the tail body 4 are as follows. The width of the net portion 20 is 300 mm, and its thickness is 4 mm. The adjacent distance between the rod-shaped portions 21 is 100
0 mm and its diameter is 20 mm. The tail body 4 is formed of, for example, a polyethylene resin, and the reinforcing core member 24 is formed of a stranded aramid fiber.

When constructing the reinforcing embankment, as shown in FIG. 2, the concrete panel 2 is installed on the base 5 and the ground is maintained, and then the tail body 4 is connected to the lower connecting groove 8. As shown in FIG. 4, the connecting end of the tail body 4 needs to cut the net portion 20 so that the rod-shaped portion 21 becomes the starting end, but the other end may be in the middle of the net portion 20. Good. Laying the tail body 4 along the prepared ground surface,
Spread embankment on the surface and harden. The tail body 4 is connected to the upper connection groove 8, and the embankment is similarly spread and hardened.
Thereafter, the above procedure is repeated to construct a reinforced embankment having the vertical retaining wall 1.

FIG. 6 shows another embodiment of the present invention relating to the connector 3. There, a pair of left and right bulges 7 was formed on the left and right sides of the back of the concrete panel 2, and one groove shaping tool 11 was insert-fixed to each bulge 7 to form a pair of right and left connection grooves 8. The connecting body 3 is made of a plastic molded article integrally formed with a horizontal frame 26 into which the rod-shaped portion 21 is inserted from the side end and engaged, and a vertically long connecting rod portion 27 projecting from the front left and right of the horizontal frame 26. The difference from the previous embodiment is that the tail body 4 can be connected to the concrete panel 2 by inserting the rod portion 27 into the connection groove 8 from above. According to this connecting body 3, the laying height of the tail body 4 can be adjusted in accordance with the ground surface and the height of the laid embankment, so that the laying length of the tail body 4 can always be set accurately.

The shape of the concrete panel 2 is not limited to a hexagon, but may be any shape. The tail body 4 can be formed by applying a resin coating to a grid-shaped knitted fabric formed by interweaving plastic fibers. If necessary, an anchor for increasing the pull-out resistance of the tail body 4 can be fixed to the middle part and the free end of the tail body 4. The groove shaping tool 11 can be formed of a strip-shaped plastic molded product or an aluminum strip.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a connection structure of a tail body.

FIG. 2 is a partially broken perspective view showing a schematic structure of a retaining wall.

FIG. 3 is a perspective view showing a connection state between a concrete panel and a tail body.

FIG. 4 is a perspective view of a tail body.

FIG. 5 is a perspective view showing a procedure for assembling a tail body.

FIG. 6 is a perspective view showing a modification of the connector.

[Explanation of symbols]

 2 Concrete panel 4 Tail body 8 Connecting groove 11 Groove shaping tool 16 Tail lead-out groove 17 Main groove 20 Net part 21 Rod part

Claims (5)

[Claims] 1. A concrete panel 2 which covers a slope of an embankment and constitutes a retaining wall 1, and a tail body 4 which is connected to a back surface of the concrete panel 2 and laid on the embankment in a landscape orientation.
A connection groove 8 for connecting the tail body 4 is formed on the back surface of the concrete panel 2. The tail body 4 is formed of a belt-shaped plastic net, and one end thereof is connected to the connection body 3. Embankment reinforcing structure that is engaged and connected to the connection groove 8 through the connection. 2. A tail portion 4 in which net portions 20 and bar portions 21 traversing the net portion 20 in the width direction are alternately formed, and the bar portions 21 serving also as the connecting members 3 are formed on the concrete panel 2.
The embankment reinforcing structure according to claim 1, wherein the embankment reinforcing structure is fitted and connected to the horizontally long connecting groove (8) provided in the (1). 3. The connecting groove 8 is formed by a groove shaping tool 11 fixedly inserted into the concrete panel 2. At least one end of the groove shaping tool 11 is opened on the peripheral surface of the concrete panel 2. The embankment reinforcement structure according to claim 1 or 2, wherein: 4. The connecting groove 8 includes a tail leading groove 16 opening on the back surface of the concrete panel 2 and a main groove 17 formed to be wider than the tail leading groove 16 and continuous with the tail leading groove 16. The embankment reinforcing structure according to claim 3, wherein the embankment reinforcing structure is formed. 5. The connecting body 3 includes a horizontal frame 26 for capturing and fixing the leading end of the tail body 4 and a connecting rod 27 substantially perpendicular to the horizontal frame 26. The connecting rod 27 is connected to the concrete panel 2. The embankment reinforcing structure according to claim 3 or 4, wherein the embankment reinforcing structure is fitted and connected to the vertically long connecting groove (8).