JP2003003473A - Construction for reinforcing slope face - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the fall of a sliding earth mass by increasing a resisting force against pull-out. SOLUTION: A construction 1 for reinforcing the face of slope is constituted by a plurality of members resisting against pull-out each comprising two steel bars 2a and 2b respectively inserted in such a manner that the tip of each steel bar can be anchored to an immobile earth mass 6 spreading behind a sliding surface of the ground; their horizontally projected angle of layout becomes diagonal to the face of slope; head of each steel bar is jointed respectively to a head connecting member 3 thereby connecting steel bars together through the head connecting member; and, in this state, the rear surface of the head connecting member 3 comes into contact with the face of slope 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope reinforcement structure used for enhancing stability and strength of a cut or embankment slope.

[0002]

2. Description of the Related Art Soil structures with slopes such as embankments and cut soil are
When it is difficult to secure long-term stability by the force of the soil itself, a reinforcing material may be inserted into the soil to perform reinforcement work to enhance the stability and strength of the entire soil structure.

The reinforcing method by inserting a reinforcing material is to insert a reinforcing material such as a reinforcing bar into the ground and compensate the weak points of the ground with the tensile force and the shearing force of the reinforcing material to obtain each characteristic of the ground and the reinforcing material. It is a construction method that mutually effectively utilizes the ground to strengthen the ground, and resists a certain amount of earth pressure and sliding force.

The reinforcing material used in such a case is arranged so as to penetrate the slip surface, but conventionally,
It was common to drive into the vertical plane orthogonal to the slope.

[0005]

However, if the pull-out resistance of the reinforcing material is small, the reinforcing material may be pulled out together with the sliding clod and the slope may collapse, and in order to stabilize the slope, Reinforcement requires some pull-out resistance. Especially in the ground where the pullout resistance is small, in order to increase the friction resistance between the reinforcing material and the immovable soil mass, the reinforcing material is lengthened or the diameter of the hole for inserting the reinforcing material is increased to increase the grout material. Had to be injected or the like.

Even when a sufficient pull-out resistance is applied to the reinforcing material, the slipping mass of sliding slip of the residual reinforcing material may slip, so-called slip-out of the sliding mass may occur. In order to prevent slipping of such slips, it was necessary to protect the slope by stabilizing it. For that purpose, for example, a slope or spraying I had to choose a costly construction method such as using a net.

When the sprayer is used, it causes problems in landscape and environmental conservation, and when the slope of the slope is gentle, the angle of intersection between the reinforcing material and the slope of the slope and slope of the slope of the slope As a result, the head becomes difficult to fix, and there is a problem that the head of the reinforcing material may be relatively displaced due to aging.

Further, when the head plate for fixing the reinforcing member to the slope is used, it is necessary to install the head plate as perpendicular as possible to the inserting direction of the reinforcing member, and therefore the slope having a gentle slope. When it is used for, there is a problem that the installation part must be dug considerably.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a slope reinforcement structure capable of increasing the pull-out resistance of a reinforcing material and preventing the slipping of a slipping earth mass. And

Another object of the present invention is to provide a slope reinforcement structure capable of preventing collapse due to slip-out of slip soil mass.

[0011]

In order to achieve the above object, in the slope reinforcing structure according to the present invention, as described in claim 1, a plurality of pull-out resistance members are provided on the slope of the ground so that their tips are the above-mentioned. Inserted so that they are fixed to the immovable soil mass that spreads behind the slip surface of the ground and their horizontal projection arrangement angle is oblique to the slope, and the head of each pull-out resistance member is The head connecting members are connected to each other by being joined to each other, and the back surface of the head connecting member is brought into contact with the slope in such a state. When the spreading slip mass causes a displacement along the slip surface, the pull-out resistance member is moved by the peripheral frictional force acting on the pull-out resistance member from the immovable mass and the ground reaction force acting diagonally to the material axis. The head Of the pull-out resistance force acting on the connecting member, by canceling out the in-plane component forces acting on the back surface of the head connecting member, the head connecting member is prevented from rotational movement and translational movement. The pullout resistance member is arranged.

Further, in the slope reinforcing structure according to the present invention, a part of the slope frame constructed on the slope of the ground is used as the head connecting member.

Further, in the slope reinforcement structure according to the present invention, the plurality of pull-out resistance members are composed of two pull-out resistance members, and the two pull-out resistance members are formed in a C shape or in a reverse projection in a horizontal projection state. It is arranged so as to form a V shape and symmetrically with respect to the head connecting member.

Further, in the slope reinforcement structure according to the present invention, the head connecting member is formed of a rectangular flat plate, and the pull-out resistance members are respectively joined to the four corners of the flat plate. is there.

Further, in the slope reinforcement structure according to the present invention, as described in claim 5, a predetermined pull-out resistance member is fixed to the slope of the ground on an immovable mass whose tip extends behind the slip surface of the ground. Inserted so that, in the sliding clod that spreads in front of the sliding surface, a predetermined vertical reinforcement is erected so that at least a part is embedded in the sliding clod, and the top of the vertical reinforcement and the The pull-out resistance member and the head are connected to each other.

Further, in the slope reinforcement structure according to the present invention, as described in claim 6, a predetermined pull-out resistance member is fixed to the slope of the ground on an immovable mass whose tip extends behind the slip surface of the ground. Inserted as described above, a predetermined vertical reinforcement is erected so that the lower end penetrates the slip surface and is fixed to the immovable mass in the slip mass that extends in front of the slip surface. The top of the material and the head of the pull-out resistance member are connected to each other.

Further, in the slope reinforcement structure according to the present invention, as described in claim 7, a plurality of pull-out resistance members are formed on the slope of the ground to form an immovable mass whose tip extends behind the slip surface of the ground. By inserting them so that they are fixed and their horizontal projection arrangement angles are oblique to the slope, and by joining the heads of the pull-out resistance members to predetermined head connecting members, respectively. Connected to each other via a head connecting member, abutting the back surface of the head connecting member to the sloped surface in such a state, and at least a part of the slip clay mass spreading in front of the slip surface to the slip clay mass. A predetermined vertical reinforcing member is erected so as to be embedded, and the top portion of the vertical reinforcing member and the head connecting member are connected to each other.

Further, in the slope reinforcement structure according to the present invention, when the slip soil mass is displaced along the slip surface,
Of the pull-out resistance force acting on the head connecting member from the pull-out resistance member by the peripheral frictional force acting on the pull-out resistance member from the immovable earth mass and the ground reaction force acting diagonally to the material axis, By canceling out the in-plane component forces acting on the back surface of the head connecting member, the rotational movement and the translational movement of the head connecting member do not occur,
The pullout resistance member is arranged.

In the slope reinforcement structure according to the present invention, as described in claim 9, a plurality of pull-out resistance members are provided on the slope of the ground to form an immovable mass whose tip extends behind the slip surface of the ground. Insert so that they are fixed and their horizontal projection arrangement angle is oblique to the slope, and at least a part is embedded in the slip mass that extends in front of the slip surface. A predetermined vertical reinforcement is erected on the top of the vertical reinforcement, and the top of the vertical reinforcement and the heads of the pull-out resistance members are connected to each other.

Further, in the slope reinforcement structure according to the present invention, when the slip soil mass is displaced along the slip surface,
Of the pull-out resistance force acting on the vertical reinforcement from the pull-out resistance member by the peripheral frictional force acting on the pull-out resistance member from the immovable earth mass and the ground reaction force acting diagonally to the material axis, the method The pull-out resistance members are arranged so that horizontal force parallel to the slope does not act on the vertical reinforcing member by canceling out horizontal component forces parallel to the surface.

In the slope reinforcement structure according to the first aspect of the present invention, a plurality of pull-out resistance members are provided on the slope of the ground so that their tips are fixed to the immovable earth mass extending behind the slip surface of the ground. Is inserted so that the horizontal projection arrangement angle thereof is oblique with respect to the slope, and the heads of the pull-out resistance members are respectively joined to predetermined head connecting members so that they are mutually connected via the head connecting members. The back surface of the head connecting member is in contact with the slope in this state.

In this manner, after the above-mentioned slope reinforcement structure is constructed, when the slip soil mass is displaced along the slip surface over time, the head contacted with the slope due to the displacement The connecting member moves together with the sliding slip mass that is in contact with the slope, but the head connecting member is joined with the pull-out resistance member whose tip is fixed to the immovable mass, so that the head The connecting member presses the slope with the pulling resistance force from the pulling resistance member as a reaction force.

In particular, in the present invention, since the pull-out resistance member is arranged obliquely with respect to the slope, the pull-out resistance force is not only the frictional force from the immovable earth mass but also the pull-out resistance member. Ground reaction force acting diagonally to the material axis is applied. That is, when the head connecting member moves along with the displacement of the slip mass, the pull-out resistance member receives not only the conventional tensile force but also the force due to bending rigidity due to the ground reaction force from the immovable mass as described above. The generated force is applied and the slope is pressed down by the head connecting member.

Therefore, the pulling-out resistance force of the pulling-out resistance member is significantly increased as compared with the conventional one, and along with this, the force of pressing the slope by the head connecting member is increased to prevent slipping out of the slip of soil. .

In the present invention, since the pull-out resistance member is arranged so as to cancel the in-plane component forces acting on the back surface of the head connecting member, the head connecting member rotates with respect to the slope. There is no fear of moving or translating.
That is, since the head connecting member does not move with respect to the slope, the pull-out resistance member joined to the head connecting member is the head that is in contact with the slope with the displacement of the slip mass. There is no possibility of moving with the part connecting member and being pulled out along the material axis direction. Therefore, the ground reaction force acting diagonally to the material axis is used as a part of the pull-out resistance force.
The pull-out resistance member can be surely made to act from the immovable earth mass.

The head connecting member may be constructed in any manner as long as the heads of the pull-out resistance members can be joined to each other. Since a force or a compressive force is applied, it is desirable to appropriately configure so as to resist the force.

[0027] The slope does not necessarily mean only the exposed surface of the ground, but the slope of the ground when the exposed surface of the ground is provided with a slope or shotcrete. The surface shall be included.

When the slope is constructed as a slope, a part of the slope constructed on the slope of the ground may be used as the head connecting member.

When the concrete frame is also used as the head connecting member, it is desirable to use it when the compressive force mainly acts on the head connecting member.

If the pull-out resistance member has a predetermined bending strength and tensile strength with respect to the pull-out force, it may be constructed in any manner. . Needless to say, if the pull-out resistance member has a predetermined shear strength, it may be possible to suppress the displacement of the slip mass in the vertical plane as in the conventional case.

The number and arrangement of the pull-out resistance members are such that the in-plane component forces acting on the back surface of the head connecting member cancel each other out so that the head connecting member is prevented from rotational movement and translational movement with respect to the slope. The arrangement is arbitrary as long as they are arranged. For example, a plurality of pull-out resistance members are configured by two pull-out resistance members and the two pull-out resistance members are horizontally projected in a horizontal projection state. And the head connecting member are arranged symmetrically with respect to the head connecting member, or the head connecting member is formed of a rectangular flat plate, and the four positions of the flat plate are arranged. It is conceivable that the pull-out resistance members are respectively joined to the projected corners of the above.

When inserting the pull-out resistance member on the slope, it is desirable to install it so that it can resist the pull-out force of the slipping soil mass, but if it does not interfere with the pouring of the grout material, it must be inserted horizontally. do not have to.

Further, in the slope reinforcement structure according to the fifth aspect, a predetermined pull-out resistance member is inserted on the slope of the ground so that the tip of the pull-out resistance member is fixed to the immovable earth mass spreading behind the slip surface of the ground. , A predetermined vertical reinforcing member is erected so that at least a part is embedded in the slip mass expanding in front of the slip surface, and the top of the vertical reinforcing member and the head of the pull-out resistance member are connected to each other. I am doing it.

In this way, when the displacement distribution of the slip mass becomes larger, for example, in the vicinity of the slope than in the slip surface, that is, in the case of an inverted triangular distribution, the vertical reinforcement has slips at the top rather than at the bottom. Although it moves largely along with the clod and tries to rotate, the vertical reinforcement is pulled from the pull-out resistance member by the pull-out resistance force acting on the top of the vertical reinforcement, so The above-mentioned rotational movement is blocked by the passive earth pressure of the slip mass that is received as a reaction force, and the slip of the slip mass is prevented.

In such a case, the vertical reinforcing material is bent and deformed by the pulling-out resistance force at the top and the passive earth pressure at the lower end.

If the pull-out resistance member has a predetermined tensile strength with respect to the pull-out force, it may be constructed in any manner. For example, it may be considered that the pull-out resistance member is formed of a reinforcing bar. Needless to say, if the pull-out resistance member has a predetermined shear strength, it may be possible to suppress the displacement of the slip mass in the vertical plane as in the conventional case.

When the pull-out resistance member is inserted, it may be inserted in the vertical plane orthogonal to the slope as in the conventional case. Further, the pull-out resistance member is preferably inserted in a predetermined direction so as to resist the pull-out force of the slipping soil mass, but it is not always required to be inserted horizontally if there is a hindrance to the injection of the grout material.

The vertical reinforcing member may have any structure as long as it has a predetermined bending strength with respect to the pull-out resistance force from the pull-out resistance member and the passive earth pressure of the slip soil mass. For example, a steel sheet pile is used. , H steel, steel pipe, rebar, and the like.

When the vertical reinforcing member is erected, the pulling resistance force from the pulling resistance member connected to the head portion and the passive earth pressure received from the slipping soil mass at the lower end are used as reaction forces to bend and resist. It may be installed as appropriate, and its lower end does not need to penetrate the slip surface, and its top part does not have to project from the slope.

In the slope reinforcement structure according to the sixth aspect, a predetermined pull-out resistance member is inserted into the slope of the ground so that the tip of the pull-out resistance member is fixed to the immovable earth mass spreading behind the slip surface of the ground. , A predetermined vertical reinforcing member is erected so that the lower end penetrates the sliding surface and is fixed to the immovable soil mass in the sliding soil mass extending in front of the sliding surface, and the top of the vertical reinforcing material and the head of the pull-out resistance member. And are connected to each other.

In this case, since the lower end of the vertical reinforcing material is fixed by the immovable mass, the pulling resistance force exerted on the top of the vertical reinforcing material from the pulling resistance member prevents the vertical reinforcing material from moving, resulting in slippage. Slipping of clods is prevented.

If the pull-out resistance member has a predetermined tensile strength against the pull-out force, as in the fifth aspect,
How to construct is arbitrary, and for example, it is conceivable to construct with a reinforcing bar. If the pull-out resistance member has a predetermined shear strength, as in the conventional case,
It goes without saying that the displacement of the slip mass in the vertical plane can be suppressed in some cases.

When the pull-out resistance member is inserted, it may be inserted in the vertical plane perpendicular to the slope as in the conventional case, as in the fifth aspect. Further, the pull-out resistance member is preferably inserted in a predetermined direction so as to resist the pull-out force of the slipping mass of soil, but it is not always required to be inserted horizontally if it hinders the injection of the grout material.

The vertical reinforcing material may be constructed in any manner as long as it has a predetermined bending strength against the pull-out resistance force from the pull-out resistance member. For example, a steel sheet pile or H
It may be composed of steel, steel pipe, rebar, and the like.

Further, when the vertical reinforcing member is erected, it is necessary to properly install the vertical reinforcing member so that the pulling resistance force acting on the pulling resistance member connected to the top of the vertical reinforcing member is fixed to the immovable earth mass. It suffices, and its top may be projected from the slope.

Further, in the slope reinforcement structure according to claim 7, a plurality of pull-out resistance members are provided on the slope of the ground such that their tips are fixed to the immovable earth mass extending behind the slip surface of the ground. Is inserted so that the horizontal projection arrangement angle thereof is oblique with respect to the slope, and the heads of the pull-out resistance members are respectively joined to predetermined head connecting members so that they are mutually connected via the head connecting members. In this state, the back surface of the head connecting member is brought into contact with the slope, and a predetermined vertical reinforcement is provided so that at least a part of the sliding clod spreading in front of the sliding surface is embedded in the sliding clod. It stands upright, and the top of the vertical reinforcing member and the head connecting member are connected to each other.

With this arrangement, as in claim 1, when the slip soil mass is displaced along the slip surface over time after the slope reinforcement structure described above is constructed, the slip surface is contacted with the slip surface along with the displacement. The head connecting member that was in contact will move together with the sliding mass that is in contact with the slope, but the pulling resistance member whose tip is fixed to the immovable mass is joined to the head connecting member. Therefore, the head connecting member presses the slope with the pull-out resistance force from the pull-out resistance member as a reaction force.

Particularly in the present invention, since the pull-out resistance member is arranged obliquely with respect to the slope, the above-mentioned pull-out resistance force has the peripheral frictional force from the immovable earth mass and the pull-out resistance member. Ground reaction force acting diagonally to the material axis is applied. That is, when the head connecting member moves along with the displacement of the slip mass, the pull-out resistance member receives not only the conventional tensile force but also the force due to bending rigidity due to the ground reaction force from the immovable mass as described above. The generated force is applied and the slope is pressed down by the head connecting member.

Therefore, the pull-out resistance force of the pull-out resistance member is significantly increased as compared with the conventional one, and along with this, the force of pressing the slope by the head connecting member is increased to prevent slipping of the slipping mass. .

Further, the head connecting member is connected to the top portion of the vertical reinforcing member at least a part of which is buried in the slip mass, and the top portion of the vertical reinforcing member is pulled out through the head connecting member. When pulling resistance force from the resistance member acts and the displacement distribution of the slip mass is, for example, an inverted triangle distribution, that is, when the displacement near the slope is larger than near the slip surface, the slip mass at the lower end of the vertical reinforcement is When the passive earth pressure is applied or the lower end penetrates the slip surface, it is fixed on the immovable soil mass, so the movement of the vertical reinforcement is prevented and the slip of the slip soil mass is prevented.

Further, since the vertical reinforcing member is connected to the head connecting member, even if the slope has a gentle slope, there is no fear that the head connecting member will slip up to the slipping mass, and the slope of the slope will not change. It is possible to apply regardless of the gradient.

The head connecting member may be constructed in any manner as long as the heads of the pull-out resistance members can be joined to each other and the tops of the vertical reinforcing members can be connected. Since the tensile force or the compressive force acts on the head connecting member depending on the arrangement of the members, it is desirable to appropriately configure the member so as to resist the force.

As with the first aspect, the pull-out resistance member may be constructed in any manner as long as it has predetermined bending strength and tensile strength with respect to the pull-out force. It is possible to configure. If the pullout resistance member has a predetermined shear strength,
Needless to say, the displacement of the slip soil mass within the vertical plane can be suppressed as in the conventional case.

The number and arrangement of the pull-out resistance members are such that their tips are fixed to the immovable earth mass spreading behind the slip surface of the ground and their horizontal projection arrangement angle is oblique to the slope. If it is inserted, the configuration is arbitrary. Of the pull-out resistance force from the pull-out resistance member, the sum of in-plane component forces acting on the back surface of the head connecting member acts as a horizontal force on the top of the vertical reinforcement member, so the vertical reinforcement member has a predetermined bending rigidity. In the case where the pull-out resistance member is provided, it is not necessary to dispose the pull-out resistance member so as to cancel the in-plane component forces acting on the back surface of the head connecting member. For example, the plurality of pull-out resistance members may be configured by two pull-out resistance members, and the two pull-out resistance members may be formed in a C shape or an inverted C shape in a horizontal projection state.
It is conceivable that the head connecting member is arranged asymmetrically.

When the pull-out resistance member is inserted into the slope, it is desirable to install the pull-out resistance member so as to resist the pull-out force of the slipping soil mass, as in the case of claim 1, but if there is a hindrance to the injection of grout material. , It is not always necessary to insert it horizontally.

The vertical reinforcing member has a predetermined bending strength with respect to the pull-out resistance force from the pull-out resistance member, that is, the horizontal component force parallel to the slope and the component force along the direction perpendicular to the slope. If so, how to configure it is arbitrary, and for example, it can be considered to be configured by a steel sheet pile, H steel, a steel pipe, a reinforcing bar, or the like.

When the vertical reinforcing member is erected, it is bent by the pulling resistance force from the pulling resistance member connected to its head and the passive earth pressure received from the slip soil mass at the lower end or the reaction force from the immovable soil mass. It may be appropriately installed so as to resist, and it does not matter whether or not the lower end thereof penetrates the slip surface, and the top thereof may protrude from the slope.

Here, when the slip soil mass is displaced along the slip surface, the pull-out resistance member is caused by the peripheral frictional force acting on the pull-out resistance member from the immovable mass and the ground reaction force acting obliquely to the material axis. From the pull-out resistance force acting on the head connecting member from each other, by canceling out the in-plane component forces acting on the back surface of the head connecting member, so that the head connecting member does not rotate and translate, When the pullout resistance member is arranged, the horizontal force does not act on the vertical reinforcing member from the head connecting member, and the bending rigidity of the vertical reinforcing member can be reduced.

Further, similarly to the first aspect, since the pull-out resistance member is arranged so as to cancel out the in-plane component forces acting on the back surface of the head connecting member, the head connecting member is disposed with respect to the slope. There is no risk of rotational or translational movement. That is, since the head connecting member does not move with respect to the slope, the pull-out resistance member joined to the head connecting member is the head that is in contact with the slope with the displacement of the slip mass. There is no possibility of moving with the part connecting member and being pulled out along the material axis direction. Therefore, the ground reaction force acting diagonally with respect to the material axis can be surely applied to the pull-out resistance member from the immovable earth mass as a part of the pull-out resistance force.

Further, in the slope reinforcing structure according to claim 9, a plurality of pull-out resistance members are provided on the slope of the ground so that their tips are fixed to the immovable earth mass extending behind the slip surface of the ground. The horizontal projection arrangement angle of is slanted with respect to the slope, and a predetermined vertical reinforcement is erected so that at least a part of it is embedded in the slip mass that extends in front of the slip surface. The top of the vertical reinforcing member and the head of each pull-out resistance member are connected to each other.

In this way, when the slip soil mass is displaced along the slip surface over time after the slope reinforcement structure described above is constructed, the vertical reinforcement that was erected on the slip soil mass due to the displacement. The material will move together with the slip mass, but since the pull-out resistance member whose tip is fixed to the immovable mass is connected to the top of the vertical reinforcement, the pull-out resistance force from the pull-out resistance member is high. In addition, when the displacement distribution of the slip mass is, for example, an inverted triangular distribution, that is, when the displacement near the slope is larger than near the slip surface, the passive earth pressure from the slip mass acts on the lower end of the vertical reinforcement. Or, when the lower end penetrates the slip surface, it is fixed to the immovable soil mass, so the movement of the vertical reinforcement is prevented, and the slip of the slip soil mass is prevented.

In particular, in the present invention, since the pull-out resistance member is arranged obliquely with respect to the slope, the pull-out resistance force described above is in addition to the peripheral frictional force from the immovable earth mass. Ground reaction force acting diagonally to the material axis is applied. That is, with the displacement of the slip mass, the pull-out resistance member generates not only the conventional tensile force but also the bending rigidity force due to the ground reaction force from the immovable mass as described above. Slip is suppressed.

Therefore, the pull-out resistance force of the pull-out resistance member is significantly increased as compared with the conventional one, and along with this, the force for suppressing the displacement of the slip soil mass by the vertical reinforcing member is increased to prevent slipping out of the slip soil mass. To be done.

As in the case of claim 1, the pull-out resistance member may be constructed in any manner as long as it has predetermined bending strength and tensile strength with respect to the pull-out force. It is possible to configure. If the pullout resistance member has a predetermined shear strength,
Needless to say, the displacement of the slip soil mass within the vertical plane can be suppressed as in the conventional case.

The number and arrangement of the pull-out resistance members are set so that their tips are fixed to the immovable earth mass spreading behind the slip surface of the ground and their horizontal projection arrangement angle is oblique to the slope. If it is inserted, the configuration is arbitrary. Of the pulling resistance force from the pulling resistance member, the sum of horizontal component forces parallel to the slope acts as a horizontal force on the top of the vertical reinforcing member, so that the vertical reinforcing member has a predetermined bending rigidity. In this case, it is not necessary to dispose the pull-out resistance members so as to cancel the horizontal component forces parallel to the slope acting on the top of the vertical reinforcing member. For example, a plurality of pull-out resistance members are composed of two pull-out resistance members, and the two pull-out resistance members are arranged asymmetrically with respect to the head connecting member so as to form a V shape in a horizontal projection state. It is conceivable to configure it.

When the pull-out resistance member is inserted into the slope, it is desirable to install the pull-out resistance member so as to resist the pull-out force of the slipping soil mass as in the case of claim 1, but if there is a hindrance to the injection of grout material, it is preferable. , It is not always necessary to insert it horizontally.

When connecting the pull-out resistance members to the vertical reinforcing member, for example, as described above, the pull-out resistance members are arranged in a V shape, and the heads of the pull-out resistance members are directly reinforced vertically. The members may be connected to each other, or may be connected to each other via a predetermined connecting member.

It should be noted that the connecting member may be constructed in any manner as long as the heads of the pull-out resistance members can be joined together and the tops of the vertical reinforcing members can be connected. Since the tensile force or the compressive force acts on the head connecting member depending on the arrangement of the members, it is desirable to appropriately configure the member so as to resist the force.

As in the seventh aspect, the vertical reinforcing member has a predetermined resistance to the pull-out resistance force from the pull-out resistance member, that is, the horizontal component force parallel to the slope and the component force along the direction perpendicular to the slope. As long as it has the bending strength of No. 2, it may be arbitrarily configured, and for example, it may be considered to be made of steel sheet pile, H steel, steel pipe, rebar, or the like.

When the vertical reinforcing member is erected, the pulling resistance force from the pulling resistance member connected to the head portion and the passive earth pressure received from the slipping soil mass at the lower end or the immovable earth force is fixed. It may be appropriately installed so as to resist bending due to the reaction force from the clod, and it does not matter whether its lower end penetrates the slip surface, or its top may project from the slope.

Here, when the slip soil mass is displaced along the slip surface, the pull-out resistance member is caused by the peripheral frictional force acting on the pull-out resistance member from the immovable mass and the ground reaction force acting obliquely to the material axis. The pull-out resistance member is arranged so that the horizontal force parallel to the slope does not act on the vertical reinforcement by canceling out the horizontal component forces parallel to the slope among the pull-out resistance forces acting on the vertical reinforcement. In this case, the pulling resistance member does not exert a horizontal force on the vertical reinforcing material, and the bending rigidity of the vertical reinforcing material can be reduced.

Further, since the pull-out resistance member is arranged so as to cancel the horizontal component forces parallel to the slope, the connecting portion between the pull-out resistance member and the vertical reinforcing member is rotated and moved with respect to the slope. There is no fear of translational movement. That is,
Since the connecting portion between the pull-out resistance member and the vertical reinforcing member does not move with respect to the slope, the pull-out resistance member is not likely to be pulled out along the axial direction of the material along with the displacement of the slip soil mass. Therefore, the ground reaction force acting diagonally with respect to the material axis can be surely applied to the pull-out resistance member from the immovable earth mass as a part of the pull-out resistance force.

In claim 5 to claim 10, as in claim 1, the slope does not necessarily mean only the exposed surface of the ground, and the exposed surface of the ground has a legal frame or a blowing surface. The surface of the sloped work when the sloped work such as reinforced concrete is applied is also included.

[0074]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a slope reinforcing structure according to the present invention will be described below with reference to the accompanying drawings.
It should be noted that parts and the like which are substantially the same as those of the conventional technique are designated by the same reference numerals and the description thereof will be omitted.

(First Embodiment)

FIGS. 1A and 1B are views showing a slope reinforcing structure according to this embodiment. FIG. 1A is a horizontal sectional view, and FIG. 1B is a vertical sectional view taken along the line AA of FIG. As shown in FIG. 1, the slope reinforcement structure 1 according to the present embodiment has two reinforcing bars 2a and 2b as a plurality of pull-out resistance members on the slope 4 of the ground, and the tips of the reinforcing bars 2a and 2b are the slip surface 5 of the ground. The heads of the respective reinforcing bars are inserted into the head connecting member 3 so that they are fixed to the immovable earth mass 6 spreading behind and their horizontal projection arrangement angles are inclined with respect to the slope 4. The head connecting members are connected to each other by joining, and the back surface of the head connecting member 3 is in contact with the slope 4 in this state.

Here, the two reinforcing bars 2a and 2b are shown in FIG.
As can be seen in (a), the distance between the reinforcing bars is narrower on the head side, that is, in a horizontal projection state in a V shape, and with respect to the head connecting member 3. They are arranged symmetrically.

Further, as shown in FIG. 2, when the slip clod 7 spreading in front of the slip surface 5 is displaced along the slip surface 5, the peripheral frictional force acting on the reinforcing bars 2a and 2b from the immovable clod 6 is generated. And the pull-out resistance force acting on the head connecting member 3 from the reinforcing bars 2a and 2b by the ground reaction force acting diagonally to the material axis, the in-plane component forces acting on the back surface of the head connecting member 3 are mutually Reinforcing bars 2a and 2b are arranged so that the head connecting member 3 is prevented from being rotated and translated by canceling each other.

The reinforcing bars 2a and 2b, which are pull-out resistance members, are
Each has a predetermined bending strength and tensile strength with respect to the pulling force. In addition, the reinforcing bars 2a, 2b
It is desirable to install so that it can resist the pulling force of the slip soil mass 7 when inserting it into the slope 4, but in this embodiment, it is difficult to inject the grout material, as can be seen in FIG. 1 (b). So that the reinforcing bars 2a and 2b are perpendicular to the slope 4 so as not to occur.

The head connecting member 3 is composed of a rectangular flat steel plate and is in contact with the slope 4. In addition, two insertion holes for inserting the reinforcing bars 2a and 2b are formed in the head connecting member 3, and the reinforcing bars 2a and 2b are inserted into the through holes and bolt-joined, so that the reinforcing bars are connected to each other. It can be connected to each other.

Since the pulling force acts on the head connecting member 3 due to the in-plane component force of the pulling-out resistance force (see FIG. 2), it has a pulling strength sufficient to resist such pulling force. As described above, it is desirable to appropriately configure the head connecting member 3.

In order to construct the slope reinforcement structure 1 according to this embodiment, first, the insertion holes for inserting the two reinforcing bars 2a and 2b into the slope 4 are excavated. At this time, in the vertical plane, the excavation is performed obliquely downward so as to be perpendicular to the slope 4, and the excavation is performed obliquely with respect to the slope 4 in the horizontal plane.

Next, after the grout material is injected into each insertion hole, the reinforcing bars 2a and 2b are inserted, and then the head connecting member 3 connects the two reinforcing bars 2a and 2b. When connecting the reinforcing bars, the head connecting member is brought into contact with the slope 4 so that the reinforcing bars 2a and 2b are inserted into the insertion holes formed in the head connecting member 3, and bolted in this state. The head connecting member 3 may be fixed.

In the slope reinforcement structure 1 according to the present embodiment, when the slip soil mass 7 is displaced along the slide face 5 over time after the slope reinforcement structure 1 is constructed as described above, the displacement occurs. Along with this, the head connecting member 3 that was in contact with the slope 4 moves together with the sliding slip mass 7 that is in contact with the slope 4, but the immovable soil mass 6 is included in the head connecting member. Since the rebars 2a and 2b having the tips fixed thereto are joined to each other, the head connecting member 3 presses the slope 4 with the pull-out resistance force from the rebars 2a and 2b as a reaction force.

In particular, in the present invention, since the reinforcing bars 2a and 2b are arranged obliquely with respect to the slope 4, as can be seen clearly in FIG. In addition to the surface frictional force, a ground reaction force acting diagonally on the material axes of the reinforcing bars 2a and 2b is applied. That is, when the head connecting member 3 moves along with the displacement of the slipping mass 7, the reinforcing bars 2a and 2b are not only subjected to the conventional tensile force but also to bend by the ground reaction force from the immovable mass 6 as described above. A force is generated by the rigidity, and the force causes the slope 4 to move to the head connecting member 3
Hold down with.

Therefore, the pulling-out resistance force by the reinforcing bars 2a, 2b is significantly increased as compared with the conventional one, and the force for pressing the slope 4 by the head connecting member 3 is increased accordingly, so that the slipping out of the slip lump 7 is prevented. Is also prevented.

In the present invention, the head connecting member 3
Since the reinforcing bars 2a and 2b are arranged so as to cancel the in-plane component forces acting on the back surface of the head, there is no fear that the head connecting member 3 rotationally moves or translates with respect to the slope 4. . That is, since the head connecting member 3 does not move with respect to the slope 4, the rebars 2 a and 2 b joined to the head connecting member move along the slope 4 as the slip soil mass 7 is displaced.
There is no possibility of moving together with the head connecting member 3 that is in contact with the head connecting member 3 and being pulled out along the material axis direction. Therefore, the ground reaction force acting obliquely with respect to the material axis can be surely applied to the reinforcing bars 2a and 2b from the immovable earth mass 7 as a part of the pull-out resistance force.

As described above, according to the slope reinforcement structure 1 according to the present embodiment, the two reinforcements 2a and 2b are provided on the slope 4.
Are inserted so that their horizontal projection arrangement angles are inclined with respect to the slope 4 and the heads of the respective reinforcing bars are joined to the head connecting member 3, respectively, so that the present invention is applied to the ground having a small pullout resistance. Even in the case, the immovable soil mass 6 can be obtained without lengthening the reinforcing bar or increasing the drilling diameter as in the conventional case.
It is possible to obtain a sufficient pulling-out resistance force by the ground reaction force of (3), and thus, it is possible to prevent the slipping earth mass 7 from collapsing and stabilize the slope 4.

Further, the head connecting member 3 presses the slope 4 by the pull-out resistance force generated with the displacement of the slip soil mass 7, so that the head connecting member also acts as a slope work, It is also possible to prevent collapse due to slipping out of the slip soil mass 7.

Further, there is no need to separately perform slope work such as a slope frame or shotcrete on the exposed surface of the ground, and even if such slope work is performed as necessary,
It can be lighter than the conventional one, and the construction cost can be reduced.

In this embodiment, the two reinforcing bars 2a and 2b are used.
Are arranged so that the distance between the reinforcing bars becomes narrower on the head side, that is, in a horizontal projection state so as to form an inverted V shape. In some cases, as shown in FIG. The two reinforcing bars 2a and 2b may be arranged so that the distance between the reinforcing bars becomes wider on the head side, that is, the reinforcing bars 2a and 2b have an inverted C shape in the horizontal projection state.

In this way, a compressive force acts on the head connecting member 13, so that it is desirable to appropriately configure the head connecting member 13 so that the rigidity against buckling is increased if necessary. .

The head connecting member 13 has substantially the same structure as the head connecting member 3 except that a compressive force acts, and the operational effects of this modification are the same as those of the embodiment described above. The description is omitted here.

Further, in this embodiment, the pull-out resistance member is composed of the two reinforcing bars 2a and 2b, and is arranged so as to have a V shape in the horizontal projection state and is joined to the head connecting member 3, respectively. However, the number of pull-out resistance members to be joined to the head connecting member is arbitrary, and for example, a pair of pull-out resistance members having a C-shape or an inverted C-shape in a horizontal projection state can be arranged in upper and lower portions. The pull-out resistance members may be arranged in a plurality of steps such as steps or three steps, and the pull-out resistance members may be respectively joined to the head connecting member.

Further, in the present embodiment, the head connecting member 3
Was directly contacted with the exposed surface of the ground, which is the slope 4, but when the exposed surface of the ground has slopes such as a slope frame and shotcrete, the head connecting member 3 may be brought into contact with the surface of the slope work.

FIG. 4 and FIG. 5 are views showing the slope reinforcement structure 21 when the slope 22 is constructed as a slope,
4A is a horizontal sectional view, FIG. 4B is a vertical sectional view, and FIG. 5 is a front view. As shown in these figures, in this modification,
A grid-shaped slope frame 22 has been constructed as a slope on the natural ground,
The head connecting member 3 is in contact with the surface near the intersection of the normal frame as the normal surface 23.

In this way, since the head connecting member 3 presses the slipping mass 7 and suppresses the slipping out of the slipping mass 7, the slope 22 which is a slope work may be lighter than the conventional method. It is possible to reduce the construction cost.
Further, such a modified example is a very effective means when it is desired to increase the pull-out resistance force when the existing legal framework is being constructed.

Since the other operational effects are the same as those of the above-mentioned embodiment, the description thereof will be omitted here.

Further, in this embodiment, the head connecting member 3 is brought into contact with the exposed surface of the ground. However, when the slope is constructed as a slope on the natural ground, it is constructed on the slope of the ground. A part of the created legal frame may be used as the head connecting member.

FIG. 6 is a horizontal sectional view showing such a modification. As shown in the figure, the slope reinforcement structure 31 according to the present modification includes two reinforcing bars 3 which are pull-out resistance members.
2a and 32b are inserted into the ground so as to have an inverted V shape, and the head of the reinforcing bar is a lattice-shaped slope frame 22 which is a concrete slope constructed on the slope 4. The region 33 of a part of the legal frame 22 including the part where the pair of reinforcing bars 32a and 32b are joined also serves as the head connecting member of the present invention.

The operational effect in such a case is the same as that of the above-described embodiment except that a compressive force is applied instead of a tensile force to the region 33 which is the head connecting member. The description is omitted.

Further, in this embodiment, the pull-out resistance member is composed of the two reinforcing bars 2a and 2b, and the reinforcing bars are formed in a V shape in the horizontal projection state and with respect to the head connecting member 3. However, the number and arrangement of the pullout resistance members are not limited to this, and for example, as shown in FIG.
As shown in the cross-sectional view of FIG. 8 and the rear view of FIG. 8, the reinforcing bars 42a, 42b, 4 which are pull-out resistance members are provided at four corners of the head connecting member 43 formed of a rectangular flat plate.
The slope reinforcing structure 41 may be configured by joining the 2c and 42d.

The reinforcing bars 42a are joined to the head connecting member 43 so as to be downward at a predetermined angle with respect to the vertical direction with respect to the head connecting member 43 and to be arranged in a vertical plane orthogonal to the slope. Together with the reinforcing bar 42d, the head connecting member 43
To the head connecting member 43 so as to be upward at a predetermined angle with respect to the vertical and to be arranged in the vertical plane orthogonal to the slope, and these reinforcing bars 42a, 42d are connected.
Are joined to each other so that they face inward.

On the other hand, the reinforcing bar 42b is obliquely joined to the head connecting member 43 so that the reinforcing bar 42c faces the predetermined angle side with respect to the vertical direction with respect to the head connecting member 43.
The head connecting member 43 is obliquely joined to the head connecting member 43 so as to face a predetermined angle side from the vertical, and these reinforcing bars 42b and 42c are joined to each other so as to face outward. is there.

Here, each rebar 42a, 42b, 42c,
Of the pull-out resistance force acting on the head connecting member 43 from 42d, the in-plane component force acting on the back surface of the head connecting member 43 is
As can be seen in the rear view of the head connecting member 43 shown in FIG. 9, the head connecting member 4 is offset by being offset from each other.
In order not to cause rotational movement and translational movement in 3,
The a, 42b, 42c, and 42d are arranged by adjusting the above-mentioned joining angle.

The operational effect in such a case is similar to that of the above-mentioned embodiment, and therefore the description thereof is omitted here.

(Second Embodiment)

Next, a slope reinforcement structure according to the second embodiment will be described with reference to the accompanying drawings. It should be noted that parts and the like that are substantially the same as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted.

10A and 10B are views showing a slope reinforcement structure according to this embodiment. FIG. 10A is a horizontal sectional view, and FIG. 10B is a vertical sectional view taken along the line FF of FIG. 10A. As shown in the figure, in the slope reinforcement structure 51 according to the present embodiment, a rebar 52, which is a predetermined pull-out resistance member, is attached to the slope 4 of the ground, and its tip extends behind the slip surface 5 of the ground. H steel 53, which is a predetermined vertical reinforcing material, is erected so that at least a part thereof is embedded in the sliding clay mass 7 while being inserted so as to be fixed to the sliding surface 5. H steel 53
And the head of the reinforcing bar 52 are connected to each other.

The reinforcing bar 52, which is a pullout resistance member, is constructed so as to have a predetermined tensile strength with respect to the pulling force. In addition, when inserting the reinforcing bar 52, FIG.
As is clear from (a), it may be inserted into the vertical plane orthogonal to the slope 4 as in the conventional case. Further, it is desirable that the reinforcing bars 52 be inserted in a predetermined direction so as to resist the pulling force of the slip soil mass 7. However, in this embodiment, it is difficult to inject the grout material, as can be seen from FIG. 10 (b). It is inserted diagonally downward so that it does not exist.

The H steel 53, which is a vertical reinforcing member, is arranged so that its top portion projects from the slope 4, and an insertion hole for inserting the reinforcing bar 52 is formed in the top portion. The reinforcing bars 52 can be connected by inserting the reinforcing bars 52 into the holes and bolting them together.

Here, the lower end of the H steel 53 is embedded in the sliding clay mass 7 to a predetermined depth, and the pulling resistance force from the reinforcing bar 52 connected to the head and the lower end of the H steel 53 are received from the sliding clay mass 7. It is configured to have a bending strength that can resist bending by using passive earth pressure as a reaction force.

In order to construct the slope reinforcement structure 51 according to this embodiment, first, the insertion hole for inserting the reinforcing bar 52 is excavated in the slope 4. At this time, excavation is performed obliquely downward in a vertical plane orthogonal to the slope 4.

On the other hand, H steel 53 is cast on the slip lump 7. At this time, the lower end thereof is embedded in the slip mass 7 and the top thereof is installed so as to project from the slope 4.

Next, after injecting the grout material into the insertion hole,
After inserting the reinforcing bar 52 into the insertion hole of the H steel 53, the reinforcing bar 52 is inserted into the insertion hole of the slope 4, and the reinforcing bar 52 is bolted to fix the reinforcing bar 52 to the H steel 53.

In the slope reinforcement structure 51 according to the present embodiment, the displacement distribution of the slip mass 7 is larger in the vicinity of the slope 4 than in the slip surface 5, as shown in FIG. In the case of the triangular distribution, the top portion of the H steel 53 moves with the slip soil mass 7 larger than the lower end and tends to rotate, but the pulling resistance force from the reinforcing bar 52 acts on the top portion of the H steel 53. Therefore, the H steel 53 is prevented from the above-described rotational movement by using the pulling-out resistance force received from the top thereof and the passive earth pressure of the sliding soil mass 7 received from the lower end thereof as a reaction force, and the slipping of the sliding soil mass 7 is prevented.

In such a case, the H steel 53
Causes bending deformation due to pullout resistance at the top and passive earth pressure at the bottom.

As described above, according to the slope reinforcement structure 51 according to the present embodiment, the reinforcing bar 52 is inserted into the slope 4, and the head of the reinforcing bar is connected to the H steel 53 which is the vertical reinforcing member. Therefore, due to the pull-out resistance force generated with the displacement of the slip clay mass 7 and the passive earth pressure of the slip clay mass 7, the H steel 53 is prevented from moving and the slip of the slip clay mass 7 is suppressed. Since it also acts as a surface work, it is possible to prevent the slipping soil mass 7 from collapsing due to hollowness and stabilize the slope 4.

Further, the H steel 53 is a slip of the clod 7,
In addition, in order to prevent slipping out of the slip block 7, it is not necessary to separately perform slope work such as a method frame or shotcrete on the exposed surface of the ground, and when such slope work is performed as necessary. However, the construction cost can be reduced as compared with the conventional one, and the construction cost can be reduced.

In this embodiment, H steel 5 is used as the vertical reinforcing material.
However, instead of this, a steel sheet pile, a steel pipe, a reinforcing bar or the like may be used as the vertical reinforcing material.

(Third Embodiment)

Next, a slope reinforcement structure according to the third embodiment will be described with reference to the accompanying drawings. Note that parts and the like that are substantially the same as those in the first and second embodiments are given the same reference numerals, and description thereof will be omitted.

12A and 12B are views showing a slope reinforcement structure according to the present embodiment, wherein FIG. 12A is a horizontal sectional view, and FIG. 12B is a vertical sectional view taken along the line GG of FIG. As shown in the figure, in the slope reinforcement structure 61 according to the present embodiment, a rebar 62, which is a predetermined pull-out resistance member, is provided on the slope 4 of the ground, and its tip extends behind the slip surface 5 of the ground. H steel 63, which is a predetermined vertical reinforcement so that the lower end penetrates the slip surface 5 and is fixed to the immovable earth mass 6 while being inserted so as to be fixed to the slip surface 5 and spreads in front of the slip surface 5. Upright,
The top of the H steel and the head of the reinforcing bar 62 are connected to each other.

The rebar 62, which is a pull-out resistance member, is constructed so as to have a predetermined tensile strength against the pull-out force, as in the second embodiment. In addition, when inserting the reinforcing bar 62, as is well understood from FIG. 12A, the reinforcing bar 62 may be inserted in the vertical plane orthogonal to the slope 4 as in the conventional case. Further, it is desirable that the reinforcing bar 62 be inserted in a predetermined direction so as to resist the pulling force of the slip soil mass 7, but in the present embodiment, it is difficult to inject the grout material, as is well understood in FIG. 12 (b). It is inserted diagonally downward so that it does not exist.

The H steel 63, which is a vertical reinforcing member, is arranged so that its top portion projects from the slope 4, and an insertion hole for inserting the reinforcing bar 62 is formed in the top portion. By inserting the reinforcing bars 62 into the holes and joining them by bolts, the reinforcing bars can be connected.

Here, the lower end of the H steel 63 is fixed to the immovable earth mass 6, and in such a state, the pulling resistance force from the reinforcing bar 62 connected to the head of the H steel 63 is used as a reaction force to bend the strength. Are configured to have.

In order to construct the slope reinforcing structure 61 according to this embodiment, first, an insertion hole for inserting the reinforcing bar 62 is excavated in the slope 4. At this time, excavation is performed obliquely downward in a vertical plane orthogonal to the slope 4.

On the other hand, H steel 63 is cast on the slip lump 7. At this time, the lower end is set so that it penetrates the sliding surface 5 and is fixed to the immovable earth mass 6 and the top portion thereof projects from the slope 4.

Next, after injecting the grout material into the insertion hole,
After inserting the reinforcing bar 62 into the insertion hole of the H steel 63, the reinforcing bar 62 is inserted into the insertion hole of the slope 4, and the reinforcing bar 62 is bolted to fix the reinforcing bar 62 to the H steel 63.

In the slope reinforcement structure 61 according to this embodiment, as shown in FIG. 13, since the lower end of the H steel 63 is fixed by the immovable earth mass 6, the reinforcing bar 62 acting on the top of the H steel 63 The pulling resistance of the H steel 63 prevents the H steel 63 from moving and prevents the slip of the slip soil mass 7.

As described above, according to the slope reinforcing structure 61 according to the present embodiment, the reinforcing bar 62 is inserted into the slope 4 and the head of the reinforcing bar is connected to the H steel 63 which is the vertical reinforcing member. Therefore, the pulling resistance generated by the displacement of the sliding clod 7 and the reaction force of the immovable clod 6 prevent the H steel 63 from moving and suppress the slip of the sliding clod 7, so that the H steel 63 has a slope. It also acts as a work, and thus, the slip surface 7 can be prevented from collapsing due to slip-out and the slope 4 can be stabilized.

In addition, the H steel 63 is a slip of the clod 7,
In addition, in order to prevent slipping out of the slip block 7, it is not necessary to separately perform slope work such as a method frame or shotcrete on the exposed surface of the ground, and when such slope work is performed as necessary. However, the construction cost can be reduced as compared with the conventional one, and the construction cost can be reduced.

In this embodiment, H steel 6 is used as the vertical reinforcing material.
However, instead of this, a steel sheet pile, a steel pipe, a reinforcing bar or the like may be used as the vertical reinforcing material.

(Fourth Embodiment)

Next, a slope reinforcement structure according to the fourth embodiment will be described with reference to the accompanying drawings. It should be noted that parts and the like that are substantially the same as those in the first to third embodiments are designated by the same reference numerals and the description thereof will be omitted.

14A and 14B are views showing a slope reinforcement structure according to this embodiment, wherein FIG. 14A is a horizontal sectional view, and FIG. 14B is a vertical sectional view taken along the line HH of FIG. As shown in the figure, the slope reinforcement structure 71 according to the present embodiment is similar to the first embodiment.
On the slope 4 of the ground, two rebars 2a, 2b as pull-out resistance members are arranged so that their tips are fixed to the immovable earth mass 6 spreading behind the slip surface 5 of the ground and their horizontal projection arrangement angles. Are inserted so as to be inclined with respect to the slope 4, and the heads of the respective reinforcing bars are joined to the head connecting member 72 so that they are connected to each other via the head connecting member, and such a state is obtained. In the present embodiment, the back surface of the head connecting member 72 is in contact with the slope 4, but in the present embodiment,
A reinforcing bar 73, which is a predetermined vertical reinforcing member, is erected on a sliding clod 7 extending in front of the sliding surface 5 so that at least a part of the clod 7 is embedded in the sliding clod 7, and the top of the reinforcing bar 73 and a head connecting member. 72 and 72 are connected to each other.

Here, the two reinforcing bars 2a and 2b are shown in FIG.
As is clear from (a), as in the first embodiment, the distance between the reinforcing bars is narrower on the head side, that is, in a horizontal projection state, and the head is formed in a V shape. They are arranged symmetrically with respect to the part connecting member 72.

Further, as in the case of the first embodiment shown in FIG. 2, when the sliding clod 7 spreading in front of the sliding surface 5 is displaced along the sliding surface 5, the immovable clod 6 rebars 2
Of the pull-out resistance force acting on the head connecting member 72 from the reinforcing bars 2a, 2b by the peripheral frictional force acting on a and 2b and the ground reaction force acting diagonally on the material axis, the head connecting member 72 The reinforcing bars 2a and 2b are arranged so that the head connecting member 72 is prevented from rotating and translating by canceling out the in-plane component forces acting on the back surface.

The reinforcing bars 2a and 2b, which are pull-out resistance members, are
Similar to the first embodiment, each has a predetermined bending strength and tensile strength with respect to the pulling force.
When inserting the reinforcing bars 2a and 2b into the slope 4, it is desirable that the reinforcing bars 2a and 2b be installed so as to resist the pulling force of the sliding soil mass 7, but in the present embodiment, as can be seen from FIG. 14 (b), In order not to hinder the injection of grout material,
It is inserted diagonally downward.

The head connecting member 72 is made of a rectangular flat steel plate and is in contact with the slope 4. The head connecting member 7
Two insertion holes for inserting the reinforcing bars 2a and 2b are formed in the wire 2. By inserting the reinforcing bars 2a and 2b into the insertion holes and bolt-joining the reinforcing bars 2a and 2b, the reinforcing bars can be connected to each other. Has become.

Since the pulling force acts on the head connecting member 72 due to the in-plane component force of the pull-out resistance force described above, the head connecting member 72 has a pulling strength sufficient to resist such pulling force. It is desirable to appropriately configure the connecting member 72.

Reinforcing bar 73, which is a vertical reinforcing material, has its lower end buried in slip soil mass 7 to a predetermined depth, and its top is slope 4
It is arranged so as to project from the head, and the top is arranged to be connected to the head connecting member 72 via a predetermined joining member 75. Here, the reinforcing bar 73 has a bending strength sufficient to resist bending with the pulling resistance force from the pulling resistance members 2a, 2b connected to the top portion thereof and the passive earth pressure received from the slip soil mass 7 at the lower end thereof as a reaction force. It is configured to have.

The joining member 75 is formed as a square steel plate horizontally protruding from the lower end of the central portion of the head connecting member 72, and has an insertion hole for inserting the reinforcing bar 73. The reinforcing bars 73 can be connected by inserting the reinforcing bars 73 into the insertion holes and bolting them together.

In order to construct the slope reinforcement structure 71 according to this embodiment, first, the insertion holes for inserting the two reinforcing bars 2a and 2b into the slope 4 are excavated. At this time, the excavation is performed obliquely downward in the vertical plane, and the excavation is performed obliquely with respect to the slope 4 in the horizontal plane.

Next, after the grout material is injected into the respective insertion holes, the reinforcing bars 2a and 2b are inserted, and then the head connecting member 72 connects the two reinforcing bars 2a and 2b. When connecting the reinforcing bars, the head connecting members are brought into contact with the slope 4 so that the reinforcing bars 2a and 2b are inserted into the insertion holes formed in the head connecting member 72, and bolts are tightened in this state. The head connecting member 72 may be fixed.

Next, the reinforcing bar 73 is driven into the slip soil mass 7 and connected to the head connecting member 72. In connecting the reinforcing bars, the reinforcing bars 73 are inserted into the insertion holes formed in the joining member 75, the reinforcing bars are driven into the slope 4, and then the reinforcing bars 7 are connected.
The top of 3 may be bolted and fixed to the joining member 75. At this time, the lower end of the reinforcing bar 73 is installed so as to be embedded in the slip soil mass 7.

In the slope reinforcement structure 71 according to the present embodiment, as with the first embodiment, after the slope reinforcement structure 71 is constructed as described above, the slip soil mass 7 is aged along the slide surface 5 over time. When displaced, the head connecting member 72 that has been in contact with the slope 4 will move together with the mama slip clay mass 7 that is in contact with the slope 4 due to this displacement. Since the reinforcing bars 2a and 2b whose tips are fixed to the immovable earth mass 6 are joined to the member, the head connecting member 72 is
The pull-out resistance force from the reinforcing bars 2a and 2b is used as a reaction force to press down the slope 4.

Particularly in the present invention, since the reinforcing bars 2a and 2b are arranged obliquely with respect to the slope 4, as in the case of the first embodiment shown in FIG. In addition to the peripheral frictional force from 6, the ground reaction force acting diagonally on the material axes of the reinforcing bars 2a and 2b is added. That is, when the head connecting member 72 moves along with the displacement of the sliding clod 7, the reinforcing bars 2a and 2b are not only bent by the conventional tensile force due to the ground reaction force from the immovable clod 6 as described above, but also bent. A force is generated by the rigidity, and the slope 4 is pressed by the head connecting member 72 by the force.

Therefore, the pulling-out resistance force by the reinforcing bars 2a, 2b is significantly increased as compared with the conventional one, and the force for pressing the slope 4 by the head connecting member 72 is increased accordingly, and the slipping out of the slip lump 7 is lost. Is also prevented.

Further, in the present embodiment, the head connecting member 7
2, the top portion of the reinforcing bar 73, which is a vertical reinforcing member partially embedded in the slip clay mass 7, is connected, and similarly to the second embodiment shown in FIG. 11, the top portion of the reinforcing bar has a head portion. When pulling resistance force from the reinforcing bars 2a and 2b acts via the connecting member 72, and the displacement distribution of the slip mass 7 is, for example, an inverted triangle distribution, that is, when the displacement in the vicinity of the slope 4 is larger than that in the vicinity of the slip surface 5, Since the passive earth pressure from the slip soil mass 7 acts on the lower end of the reinforcing bar 73, the reinforcing bar 73
Is prevented from moving, and slipping of the slip soil mass 7 is prevented.

Further, the slope reinforcement structure 71 according to the present embodiment.
In the same manner as in the first embodiment, since the reinforcing bars 2a and 2b are arranged so as to cancel the in-plane component forces acting on the back surface of the head connecting member 72, the head connecting member 72 has the slope 4 There is no fear of rotational movement or translational movement with respect to. That is, since the head connecting member 72 does not move with respect to the slope 4, the reinforcing bars 2 a and 2 b joined to the head connecting member contact the slope 4 as the slip soil mass 7 is displaced. It moves together with the head connecting member 72 that is in contact,
There is no risk of being pulled out along the material axis direction. Therefore, the ground reaction force acting diagonally with respect to the material axis can be surely applied to the reinforcing bars 2a and 2b from the immovable earth mass 6 as a part of the pull-out resistance force.

As described above, according to the slope reinforcement structure 71 according to the present embodiment, the slope 4 is the same as in the first embodiment.
Since the two rebars 2a, 2b were inserted in such a way that their horizontal projection arrangement angles were oblique to the slope 4 and the heads of the rebars were respectively joined to the head connecting member 72, Even if it is applied to the ground with a small resistance force, it is possible to obtain sufficient pull-out resistance force by the ground reaction force of the immovable earth mass 6 without lengthening the reinforcing bar or increasing the drilling diameter as in the past. Thus, the slip soil 7 can be prevented from collapsing and the slope 4 can be stabilized.

Further, the head connecting member 72 presses the slope 4 by the pull-out resistance force generated along with the displacement of the slip soil mass 7, so that the head connecting member also acts as a slope. It is also possible to prevent collapse due to slipping out of the slip soil mass 7.

In addition, the reinforcing bar 73 which is a vertical reinforcing member is provided on the slope 4.
And the top of the rebar is connected to the head connecting member 72.
Since it is connected to, due to the pulling-out resistance force generated by the displacement of the slip clay mass 7 and the passive earth pressure of the slip clay mass 7, the movement of the reinforcing bar 73 is blocked, and the slip of the slip clay mass 7 is suppressed. Since it also acts as a surface work, it is possible to prevent the slipping soil mass 7 from collapsing due to hollowness and stabilize the slope 4.

In addition, the head connecting member 72 and the reinforcing bars 73 also act as slopes to prevent the slipping of the sliding clod 7 from slipping out. Therefore, slopes such as slopes and shotcrete are formed on the exposed surface of the ground. In addition to the necessity of performing the work, it is possible to reduce the construction cost even if the slope work is performed as needed, as compared with the conventional method.

Further, since the reinforcing bar 73 which is a vertical reinforcing member is connected to the head connecting member 72, even if the slope has a gentle slope, the relative displacement of the head connecting member 72 with respect to the slip clod 7 will occur. There is no fear of rising and it can be applied regardless of the slope of the slope.

Further, the slope reinforcement structure 71 according to the present embodiment.
According to this, the in-plane component forces acting on the back surface of the head connecting member 72 are canceled each other, so that the head connecting member 72 is prevented from rotational movement and translational movement.
Since b is arranged, the head connecting member 72 to the reinforcing bar 73
It is possible to reduce the bending rigidity of the reinforcing bar 73 because the horizontal force does not act on the.

In this embodiment, the two reinforcing bars 2a and 2b are used.
Are arranged so that the distance between the rebars becomes narrower on the head side, that is, in a horizontal projection state, the two rebars 2a, 2b may be arranged.
May be arranged so that the distance between the reinforcing bars becomes wider on the head side, that is, in the inverted C shape in the horizontal projection state.

Further, in the present embodiment, the head connecting member 72
The reinforcing bars 2a and 2b, which are pull-out resistance members, are arranged so as to cancel out the in-plane component forces acting on the back surface of the above. However, the reinforcing bars 2a and 2b are arranged so as to cancel out the in-plane component forces. No need. In such a case, of the pull-out resistance force from the pull-out resistance member, the sum of the in-plane component forces acting on the back surface of the head connecting member acts as a horizontal force on the top of the vertical reinforcing member, so The vertical stiffener must be constructed to have a predetermined flexural rigidity so that it can resist.

Further, in this embodiment, the reinforcing bar 73 is used as the vertical reinforcing material, but instead of this, steel sheet pile, H steel, steel pipe or the like may be used as the vertical reinforcing material.

Further, in the present embodiment, the reinforcing bar 73 which is the vertical reinforcing member is installed so that the lower end thereof is embedded in the slip soil mass 7. However, in some cases, the lower end of the vertical reinforcing member is passed through the slip surface. You may make it fixate on the immovable earth mass 6.

The operational effect in this case is the same as that of the above-described embodiment except that the lower end of the vertical reinforcing member acts not on the passive earth pressure of the sliding clod 7 but on the fixing force of the immovable clod 6. Therefore, the description thereof is omitted here.

(Fifth Embodiment)

Next, a slope reinforcement structure according to the fifth embodiment will be described with reference to the accompanying drawings. It should be noted that parts and the like that are substantially the same as those in the first to fourth embodiments are designated by the same reference numerals and the description thereof will be omitted.

FIGS. 15A and 15B are views showing a slope reinforcing structure according to the present embodiment. FIG. 15A is a horizontal sectional view, and FIG. 15B is a vertical sectional view taken along the line II of FIG. As shown in the figure, the slope reinforcement structure 81 according to the present embodiment is similar to the fourth embodiment.
On the slope 4 of the ground, two rebars 2a, 2b as pull-out resistance members are arranged so that their tips are fixed to the immovable earth mass 6 spreading behind the slip surface 5 of the ground and their horizontal projection arrangement angles. Are inserted so as to be inclined with respect to the slope 4, and the heads of the respective reinforcing bars are connected to the connecting member 82.
They are connected to each other via the connecting member by joining to each other, and have a predetermined vertical reinforcement so that at least a part is embedded in the slip clay mass 7 spreading in front of the slip surface 5. The reinforcing bar 73, which is a member, is erected, and the top of the reinforcing bar 73 and the connecting member 82 are connected to each other. However, in the present embodiment, the back surface of the connecting member 82 is in contact with the slope 4. Without contact.

Here, the two reinforcing bars 2a and 2b are shown in FIG.
As can be seen from (a), as in the fourth embodiment, the distance between the reinforcing bars is smaller on the head side, that is, in a horizontal projection state, and is connected in a V shape. Member 8
They are arranged symmetrically with respect to 2.

Further, as in the case of the first embodiment shown in FIG. 2, when the sliding clod 7 spreading in front of the sliding surface 5 is displaced along the sliding surface 5, the immovable clod 6 causes the reinforcing bar 2 to move.
Of the pull-out resistance force acting on the connecting member 82 from the reinforcing bars 2a, 2b by the peripheral frictional force acting on a and 2b and the ground reaction force acting diagonally on the material axis, the horizontal component parallel to the slope 4 The reinforcing bars 2a and 2b are arranged so that horizontal forces parallel to the slope 4 do not act on the reinforcing bar 73 which is the vertical reinforcing member by canceling the forces.

The reinforcing bars 2a and 2b, which are pull-out resistance members, are
Similar to the first embodiment, each has a predetermined bending strength and tensile strength with respect to the pulling force.
When inserting the reinforcing bars 2a and 2b into the slope 4, it is desirable that the reinforcing bars 2a and 2b be installed so as to resist the pulling force of the slip soil mass 7, but in the present embodiment, as can be seen from FIG. 15 (b), In order not to hinder the injection of grout material,
It is inserted diagonally downward.

The connecting member 82 is made of a rectangular flat steel plate. In addition, two through holes for inserting the reinforcing bars 2a and 2b are formed in the connecting member 82, and by inserting the reinforcing bars 2a and 2b into the inserting holes and bolt-joining,
The respective reinforcing bars can be connected to each other.

Since the pulling force acts on the connecting member 82 by the horizontal component force of the pull-out resistance force described above, the connecting member 82 is appropriately selected so as to have a pulling strength capable of resisting the pulling force. It is desirable to configure it.

The reinforcing bar 73, which is a vertical reinforcing member, has its lower end buried in the slip mass 7 to a predetermined depth, and its top is sloped 4
It is arranged so as to project from, and the top part is arranged to be connected to the connecting member 82 via a predetermined joining member 75. Here, the reinforcing bar 73 has a bending strength sufficient to resist bending with the pulling resistance force from the pulling resistance members 2a, 2b connected to the top portion thereof and the passive earth pressure received from the slip soil mass 7 at the lower end thereof as a reaction force. It is configured to have.

The joining member 75 is formed as a square steel plate horizontally protruding from the lower end of the central portion of the connecting member 82, and has an insertion hole for inserting the reinforcing bar 73. By inserting the reinforcing bars 73 into the insertion holes and joining them by bolts, the reinforcing bars can be connected.

In order to construct the slope reinforcement structure 81 according to this embodiment, first, the insertion holes for inserting the two reinforcing bars 2a and 2b into the slope 4 are excavated. At this time, the excavation is performed obliquely downward in the vertical plane, and the excavation is performed obliquely with respect to the slope 4 in the horizontal plane.

Next, after the grout material is injected into each insertion hole, the reinforcing bars 2a and 2b are inserted, and then the two reinforcing bars 2a and 2b are connected by the connecting member 82. When connecting the reinforcing bars, the reinforcing bars 2a and 2b are respectively inserted into the insertion holes formed in the connecting member 82, and then the two reinforcing bars 2a and 2b are fixed to the connecting member 82 by bolting from both sides, for example. Good.

Next, the reinforcing bar 73 is driven into the slip soil mass 7 and connected to the connecting member 82. In connecting the reinforcing bars, the reinforcing bars 73 are inserted through the insertion holes formed in the joining member 75, the reinforcing bars are driven into the slope 4, and then the tops of the reinforcing bars 73 are bolted and fixed to the joining members 75. Good.
At this time, the lower end of the reinforcing bar 73 is installed so as to be embedded in the slip soil mass 7.

In the slope reinforcement structure 81 according to the present embodiment, after the slope reinforcement structure 81 is constructed as described above,
When the sliding clod 7 is displaced along the sliding surface 5 over time, the reinforcing bars 73 erected on the sliding clod 7 will move together with the sliding clod 7 due to the displacement, but the second implementation In the same manner as shown in FIG. 11 of the embodiment, the reinforcing bars 2a, 2 having the tips fixed to the immovable earth mass 6 are provided on the tops of the reinforcing bars.
Since b is connected, pull-out resistance force from the reinforcing bars 2a and 2b acts, and the displacement distribution of the slip mass 7 is, for example, an inverted triangle distribution, that is, the displacement near the slope 4 is larger than that near the slip surface 5. In this case, since the passive earth pressure from the slip soil mass 7 acts on the lower end of the reinforcing bar 73, the movement of the reinforcing bar 73 is prevented and the slip of the slip soil mass 7 is prevented.

Particularly in the present invention, since the reinforcing bars 2a and 2b are arranged obliquely with respect to the slope 4, as in the case of the first embodiment shown in FIG. In addition to the peripheral frictional force from 6, the ground reaction force acting diagonally on the material axes of the reinforcing bars 2a and 2b is added. That is, with the displacement of the slip soil mass 7, the reinforcing bars 2a and 2b are
By the ground reaction force from the immovable earth mass 6 as described above, not only the conventional tensile force but also a force due to bending rigidity is generated,
The slip force of the slip clod 7 is suppressed by this force.

Therefore, the pull-out resistance force by the reinforcing bars 2a, 2b is significantly increased as compared with the conventional one, and along with that, the force for suppressing the displacement of the sliding clod 7 by the reinforcing bar 73 is increased and the slipping-out of the sliding clod 7 is prevented. Is prevented.

Further, the slope reinforcement structure 81 according to the present embodiment.
In the above, since the reinforcing bars 2a and 2b are arranged so as to cancel the horizontal component forces parallel to the slope 4, the connecting member 82 is not likely to rotate or translate with respect to the slope 4. Absent. That is, since the connecting member 82 does not move with respect to the slope 4, the reinforcing bars 2a and 2b joined to the connecting member are pulled out along the axial direction of the material along with the displacement of the sliding clod 7. There is no fear. Therefore, the ground reaction force acting diagonally with respect to the material axis can be surely applied to the reinforcing bars 2a and 2b from the immovable earth mass 6 as a part of the pull-out resistance force.

As described above, according to the slope reinforcement structure 81 according to the present embodiment, the slope 4 is the same as in the first embodiment.
Since the two reinforcing bars 2a and 2b are inserted so that their horizontal projection arrangement angles are oblique with respect to the slope 4 and the heads of the reinforcing bars are respectively joined to the connecting member 82,
Even when applied to the ground where pulling resistance is small,
It is possible to obtain sufficient pull-out resistance by the ground reaction force of the immovable soil mass 6 without lengthening the reinforcing bar or increasing the drilling diameter as in the past, thus preventing the sliding soil mass 7 from collapsing. Thus, the slope 4 can be stabilized.

In addition, the reinforcing bar 73, which is a vertical reinforcing member, is provided on the slope 4.
Since the top portion of the reinforcing bar was connected to the connecting member 82 while the insertion of the sliding bar, the pulling-out resistance force generated by the displacement of the sliding clod 7 and the passive earth pressure of the sliding clod 7 made the reinforcing bar 7
Since the movement of 3 is blocked and the slip of the slip clod 7 is suppressed, the reinforcing bar 73 also acts as a slope work,
Thus, it is possible to prevent the slip soil mass 7 from collapsing due to slip-out and stabilize the slope 4.

Further, since the reinforcing bar 73 also acts as a slope work and suppresses the slip-out of the slip lump 7, it is not necessary to apply slope work such as a slope frame or shotcrete to the exposed surface of the ground. Even when the slope work is performed as needed, it is possible to reduce the construction cost as compared with the conventional one, and it is possible to reduce the construction cost.

Further, the slope reinforcement structure 81 according to the present embodiment.
According to the above, since the horizontal component forces parallel to the slope 4 are offset from each other, the reinforcing bars 2a and 2b are arranged so that the connecting member 82 does not rotate and translate.
A horizontal force does not act on the reinforcing bar 73 from the connecting member 82, and the bending rigidity of the reinforcing bar 73 can be reduced.

In this embodiment, the two reinforcing bars 2a and 2b are used.
Are arranged so that the distance between the rebars becomes narrower on the head side, that is, in a horizontal projection state, the two rebars 2a, 2b may be arranged.
May be arranged so that the distance between the reinforcing bars becomes wider on the head side, that is, in the inverted C shape in the horizontal projection state.

Further, in the present embodiment, the reinforcing bars 2a and 2b, which are pull-out resistance members, are arranged so as to cancel the horizontal component forces parallel to the slope 4, but the reinforcing bars 2a and 2b are arranged.
b does not necessarily have to be arranged so as to cancel the horizontal component force. In this case, of the pulling resistance force from the pulling resistance member, the sum of horizontal component forces parallel to the slope 4 acts on the top of the vertical reinforcing member as a horizontal force.
It is necessary to configure the vertical reinforcing member so as to have a predetermined bending rigidity so as to resist such a force.

Further, in this embodiment, the reinforcing bar 73 is used as the vertical reinforcing material, but instead of this, steel sheet pile, H steel, steel pipe or the like may be used as the vertical reinforcing material.

Further, in the present embodiment, the reinforcing bar 73, which is the vertical reinforcing material, is installed so that the lower end thereof is embedded in the slip mass 7. However, in some cases, the lower end of the vertical reinforcing material may penetrate the slip surface. You may make it fixate on the immovable earth mass 6.

The operational effect in this case is similar to that of the above-described embodiment, except that the lower end of the vertical reinforcing member acts not on the passive earth pressure of the sliding clod 7 but on the fixing force of the immovable clod 6. Therefore, the description thereof is omitted here.

Further, in this embodiment, the reinforcing bars 2a and 2b which are pull-out resistance members and the reinforcing bar 73 which is a vertical reinforcing member are
Although the connection members 82 are connected to each other, the connection members are not necessarily used when connecting the pull-out resistance member to the vertical reinforcing member, and the connection members may be omitted in some cases. In such a case, for example, two pull-out resistance members are arranged in a V shape in a horizontal projection state, and the heads of the pull-out resistance members are directly joined to the vertical reinforcing member by welding or the like. Will be done.

[0190]

As described above, according to the slope reinforcement structure according to the present invention, even when it is applied to the ground having a small pull-out resistance, the pull-out resistance member can be lengthened as in the conventional case, It is possible to obtain sufficient pull-out resistance by the ground reaction force of the immovable soil mass without increasing the diameter of the drilled hole, thus preventing the slipping of the slip soil mass and stabilizing the slope.

Further, the head connecting member presses the slope due to the pull-out resistance force generated by the displacement of the slipping mass, so that the head connecting member also acts as a slope work, and It is also possible to prevent the collapse due to the hollow.

Further, the pull-out resistance generated by the displacement of the slip mass and the passive earth pressure of the slip mass or the fixing force of the immovable mass prevent the vertical reinforcing member from moving and suppress the slip of the slip mass. The vertical reinforcing material also acts as a slope work, and thus, it becomes possible to prevent the collapse due to the slip-out of the slip mass and to stabilize the slope surface.

[0193]

[Brief description of drawings]

FIG. 1 is a view showing a slope reinforcement structure according to a first embodiment, in which (a) is a horizontal cross-sectional view and (b) is a vertical cross-sectional view taken along the line AA of (a).

FIG. 2 is a view showing an operation of the slope reinforcement structure according to the first embodiment.

FIG. 3 is a horizontal sectional view showing a slope reinforcement structure according to a modified example of the first embodiment.

4A and 4B are diagrams showing a slope reinforcement structure according to a modified example of the first embodiment, in which FIG. 4A is a horizontal sectional view, and FIG. 4B is a vertical sectional view taken along line BB in FIG. 4A.

FIG. 5 is a front view showing a slope reinforcement structure according to a modification of the first embodiment.

FIG. 6 is a horizontal sectional view showing a slope reinforcement structure according to a modification of the first embodiment.

7A and 7B are views showing a slope reinforcement structure according to a modified example of the first embodiment, in which FIG. 7A is a horizontal sectional view, and FIG. 7B is a vertical sectional view taken along the line CC of FIG.

FIG. 8 is a view showing a slope reinforcement structure according to a modification of the first embodiment, (a) is a rear view of the head connecting member, and (b) is a view.
Sectional drawing which follows the DD line of (a), (c) is sectional drawing which follows the EE line of (a).

FIG. 9 is a view showing the operation of the slope reinforcement structure according to the modified example of the first embodiment, and is a rear view of the head connecting member.

10A and 10B are views showing a slope reinforcement structure according to the second embodiment, where FIG. 10A is a horizontal sectional view, and FIG. 10B is a vertical sectional view taken along line FF of FIG. 10A.

FIG. 11 is a view showing an operation of the slope reinforcement structure according to the second embodiment.

12A and 12B are diagrams showing a slope reinforcement structure according to a third embodiment, where FIG. 12A is a horizontal sectional view and FIG. 12B is a vertical sectional view taken along the line GG of FIG.

FIG. 13 is a view showing an operation of the slope reinforcement structure according to the third embodiment.

14A and 14B are views showing a slope reinforcement structure according to a fourth embodiment, where FIG. 14A is a horizontal sectional view, and FIG. 14B is a vertical sectional view taken along the line HH of FIG. 14A.

15A and 15B are views showing a slope reinforcement structure according to a fifth embodiment, where FIG. 15A is a horizontal sectional view, and FIG. 15B is a vertical sectional view taken along line I-I of FIG. 15A.

[Explanation of symbols]

1, 21, 31, 41, 51, 61, 71, 81 Slope reinforcement structures 2a, 2b, 32a, 32b, 42a to 42d, 52,
62 Reinforcing bar (pull-out resistance member) 3, 13, 43, 72 Head connecting member 4, 23 Slope 5 Sliding surface 6 Immovable clod 7 Sliding clod 22 Method frame 33 Region (head coupling member) 53, 63 H steel (vertical Reinforcement material) 73 Reinforcing bar (vertical reinforcement material)

Claims (10)

[Claims] 1. A plurality of pull-out resistance members are fixed to a slope of the ground so that their tips are fixed to an immovable earth mass spreading behind the slip surface of the ground and their horizontal projection arrangement angles are relative to the slope. And insert it diagonally,
The heads of the pull-out resistance members are respectively joined to a predetermined head connecting member so that they are connected to each other via the head connecting member, and in this state, the back surface of the head connecting member is set to the slope. When the sliding clod that abuts and spreads in front of the sliding surface causes a displacement along the sliding surface, the frictional force acting on the pull-out resistance member from the immovable clod and the slanting surface with respect to the material axis Of the pull-out resistance forces that act on the head connecting member from the pull-out resistance member by the ground reaction force that acts, the in-plane component forces that act on the back surface of the head connecting member cancel each other out, so that the head connecting A slope reinforcement structure in which the pull-out resistance member is arranged so that the member does not rotate or translate. 2. The slope reinforcing structure according to claim 1, wherein a part of a slope frame constructed on a slope of the ground is used as the head connecting member. 3. The plurality of pull-out resistance members are composed of two pull-out resistance members, and the two pull-out resistance members are formed in a C-shape or an inverted C-shape in a horizontal projection state, and The slope reinforcement structure according to claim 1, wherein the slope reinforcement structure is arranged symmetrically with respect to the head connecting member. 4. The slope reinforcing structure according to claim 1, wherein the head connecting member is formed of a rectangular flat plate, and the pull-out resistance members are respectively joined to four projecting corners of the flat plate. 5. A predetermined pull-out resistance member is inserted on the slope of the ground so that its tip is fixed to an immovable earth mass that spreads behind the slip surface of the ground, and a slip mass that spreads in front of the slip surface. , A predetermined vertical reinforcing member is erected so that at least a part thereof is embedded in the slip mass, and the top of the vertical reinforcing member and the head of the pull-out resistance member are connected to each other. Reinforced structure. 6. A predetermined pull-out resistance member is inserted on the slope of the ground so that the tip of the pull-out resistance member is fixed to an immovable soil mass that spreads behind the slip surface of the ground, and a slip mass that spreads in front of the slip surface. , A predetermined vertical reinforcing member is erected so that the lower end penetrates the sliding surface and is fixed to the immovable earth mass, and the top of the vertical reinforcing member and the head of the pull-out resistance member are connected to each other. Characteristic slope reinforcement structure. 7. A plurality of pull-out resistance members are fixed to a slope of the ground so that their tips are fixed to an immovable earth mass spreading behind the slip surface of the ground and their horizontal projection arrangement angles are relative to the slope. And insert it diagonally,
The heads of the pull-out resistance members are respectively joined to a predetermined head connecting member so that they are connected to each other via the head connecting member, and in this state, the back surface of the head connecting member is set to the slope. While abutting, a predetermined vertical reinforcing member is erected so that at least a part of the sliding clay mass extending in front of the sliding surface is embedded in the sliding clay mass, and the top of the vertical reinforcing material and the head connecting member. Slope reinforcement structure characterized by connecting to each other. 8. A frictional force acting on the pull-out resistance member from the immovable soil mass and a ground reaction force acting obliquely to the material axis when the slip soil mass is displaced along the slip surface. Among the pullout resistance forces that act on the head connecting member from the pullout resistance member, the in-plane component forces that act on the back surface of the head connecting member cancel each other out, so that the head connecting member rotates and translates. The slope reinforcement structure according to claim 7, wherein the pull-out resistance member is arranged so as not to move. 9. A plurality of pullout resistance members are fixed to a slope of the ground such that their tips are fixed to an immovable soil mass extending behind the slip surface of the ground and their horizontal projection arrangement angles are relative to the slope. And insert it diagonally,
A predetermined vertical reinforcing member is erected so that at least a part of the sliding soil mass that extends before the sliding surface is embedded in the sliding soil mass, and the top portion of the vertical reinforcing material and the head portion of each pull-out resistance member are provided. Slope reinforcement structure characterized by being connected to each other. 10. The frictional force acting on the pull-out resistance member from the immovable soil mass and the ground reaction force acting obliquely to the material axis when the slip soil mass is displaced along the slip surface. Of the pullout resistance forces acting on the vertical reinforcement from the pullout resistance member, by canceling out the horizontal component forces parallel to the slope, the horizontal forces parallel to the slope do not act on the vertical reinforcement. 10. The slope reinforcement structure according to claim 9, wherein the pull-out resistance member is arranged as described above.