JP6576138B2 - Slope stabilization structure, restraint member used for it, and slope stabilization method - Google Patents

Description

  The present invention relates to a slope stabilization structure including a net laid along a slope in order to stabilize the slope, a restraint member used therefor, and a slope stabilization method.

  Conventionally, on slopes that have been landslides in the past, or slopes that have been prone to landslides such as road wrinkles, if it rains, the landslide on the surface of the slope tends to slip and landslides are likely to occur. Before it occurs, it is necessary to stabilize the slope by fixing sediment on the slope in advance.

  Conventionally, as described in Patent Document 1, as a slope stabilization structure that suppresses such landslides, a slope stabilization structure including a net, a bearing plate that presses the net, and a lock bolt. It has been known. In this structure, the lock bolt is driven into the slope, the slope where landslides are likely to occur is covered with the net, the support plate is mounted on the lock bolt, placed on the net, and the nut screwed into the male thread of the lock bolt The bearing plate presses the net against the slope by tightening the bearing plate downward by. In the slope stabilization structure having the above structure, when the earth and sand on the slope rises when it rains, the net receives the pressure from the earth and sand, and further the force acting on the net is supported by the bearing plate. Is transmitted to the lock bolt, and finally the lock bolt receives a force acting on the net, thereby preventing the landslide.

JP 2001-11863 A

  However, in the above-mentioned slope stabilization structure, the bearing plate only presses a part of the net, and there is a problem that it is difficult for force to be transmitted from the net spreading over a wide area to the rock bolt through the bearing plate. is there. In particular, since the force is difficult to be transmitted from the net to the lock bolt through the support plate at a location far from the support plate, the net may swell and the effect of preventing the earth and sand from descending may be reduced.

  The present invention has been made to solve the above-described problem, and provides a slope stabilization structure capable of reliably transmitting the force from the net to the lock bolt when the force acts on the net from the slope. Is to provide.

In order to achieve the above object, the slope stabilization structure of the present invention is a slope stabilization structure that is installed on a slope and stabilizes the slope, and is provided at a plurality of positions spaced apart from each other on the slope. A plurality of lock bolts having an embedded portion embedded in the ground of the slope and a male screw portion protruding from the embedded portion on the slope, and a region where the plurality of lock bolts are embedded in the slope. A covering net, a plurality of cables routed between the plurality of lock bolts on the net, and a through-hole through which the male screw portion can pass, and the male screw portion has penetrated the through-hole. in is arranged on the upper side of the said cable, the cable and the restraining member, by being fastened to said restraining member that restrains the cable while being fixed to the locking bolt A cable coupling member that couples the cable to the restraining member, and a nut that is screwed into the male screw portion and presses the restraining member toward the cable, and the restraining member has the through hole formed therein. A main body part and a projecting part projecting downward from the lower surface of the main body part, the main body part and the projecting part are integrally formed , and the restraining member is screwed into a male screw part of a lock bolt. The cable coupling member is fastened to the lower surface side of the main body portion of the restraining member in a state of being pressed and fixed to the cable by a nut, so that the cable is separated from the inclined surface on the net. in floating and conditions, especially the said in a state of being pressed downward by the projecting portion while being pressed upward by a cable coupling member is held on the lower surface of the main body portion, it It is set to.

  In the present invention, the force acting on the net is transmitted to the restraining member via the cable. The cable is pressed downward by the protruding portion of the restraining member and upward by the cable coupling member on the lower surface of the restraining member. Therefore, the restraining member can restrain the cable while being fixed to the lock bolt. As a result, it is possible to reliably transmit the force acting on the net to the lock bolt via the restraining member.

That is, according to the above configuration, a plurality of cables are routed between the lock bolts on the net . In a state where the captive member is fixed by being pressed against the cable by a nut screwed to the male screw portion of the lock bolt, by the cable coupling member is fastened to the lower surface of the main body portion of the restraining member, cable is In the state where it floats from the slope on the net, it is pressed upward by the cable coupling member and is held down on the lower surface of the main body portion while being pressed downward by the protruding portion protruding downward from the lower surface of the main body portion. The As described above, the cable is restrained by the lower surface of the restraining member by receiving both the upper and lower pressing forces received from the cable coupling member and the protruding portion in a state of floating from the slope on the net . Movement is restricted. Therefore, when a force acts on the net from the slope due to landslides, the force is reliably transmitted from the net to the restraining member via the cable routed on the net, and further reliably from the restraining member to the lock bolt. Since this is transmitted, it is possible to finally receive the force with a lock bolt. As a result, the force acting on the net at a location far from the restraint member can be reliably transmitted to the restraint member via the cable and finally received by the lock bolt, thereby reducing the risk of the net bulging and restraining the sediment from falling. The effect is improved.

  Preferably, the apparatus further includes a plurality of net coupling members that couple the net to the cable.

  According to such a configuration, it is possible to more reliably transmit the force acting on the net to the cable via the net coupling member.

  The cable coupling member includes an intermediate portion having a width capable of receiving the cable from below, and a pair of coupling portions extending upward from both ends of the intermediate portion and coupled to the main body portion, It is preferable that an end portion of each coupling portion is inserted upward with respect to the main body portion and engaged with the main body portion.

  According to such a configuration, with the intermediate portion of the cable coupling member receiving the cable from below, each end portion of the pair of coupling portions is inserted upward into the main body portion of the restraining member and engaged with the main body portion. Thus, it is possible to couple the cable to the restraining member. Thereby, the operation | work which fixes a cable to the lower surface of the main-body part of a restraint member can be performed easily.

  It is preferable that the cable is routed while being bent in contact with the side surface of the lock bolt.

  According to such a configuration, the cable is routed while being bent in contact with the side surface of the lock bolt, so that the cable is routed between the plurality of lock bolts, for example, in a zigzag or perpendicular direction. It is possible to route easily while changing. This makes it possible to extend the cable routing length on the net, and as a result, increase the number of net coupling members that couple the net to the cable, further strengthening the coupling state between the net and the cable. Is possible.

  Further, it is preferable that the projecting portions are respectively disposed at positions on both sides of the main body portion across the through hole, and the cable coupling members are disposed at positions near the projecting portions on both sides. .

  According to this configuration, the lower surface of the main body portion is pressed upward by the cable coupling member and pressed downward by the protruding portion on both sides of the lock bolt inserted into the through hole of the restraining member. Therefore, it is possible to hold the cable more firmly with respect to the restraining member.

  The protruding portion has a cable pressing portion that presses the cable and a net engaging portion that can be engaged with the net, and the protruding length from the lower surface of the main body portion in the net engaging portion is It is preferable that it is longer than the protruding length of the cable pressing portion.

  According to this configuration, the protruding portion of the restraining member is positioned below the cable by the net engaging portion having a longer protruding length from the lower surface of the main body than the cable pressing portion while pressing the cable downward by the cable pressing portion. It is possible to securely engage with the net to be performed. As a result, the force acting on the net can be transmitted to the restraining member via the cable and directly transmitted to the restraining member via the net engaging portion, so that the force acting on the net can be more reliably restrained. Can be communicated to.

  Moreover, it is preferable that the said net engaging part is arrange | positioned at the both sides of the said cable press part.

  According to such a configuration, the net engaging portions having a longer protruding length than the cable pressing portion are arranged on both sides of the cable pressing portion, so that the net pressing portion is pressed downward by the cable pressing portion. It is possible to prevent the cable from being shifted from the cable pressing portion to either side of the cable pressing portion and being detached from the lower position of the cable pressing portion.

The restraining member of the present invention has a through-hole through which a male thread protruding from the slope of a lock bolt embedded in the ground can pass, and abuts against the nut screwed into the male thread through the through-hole. A main body portion having a shape that can be pressed downward by the lower surface of the main body portion, and a protruding portion that protrudes downward from the lower surface of the main body portion, and the main body portion and the protruding portion are integrally formed, The main body portion has a mounting portion having a shape in which a cable coupling member for coupling a cable to the main body portion can be fastened to the lower surface of the main body portion, and the mounting portion and the protruding portion are formed by the cable coupling member. It is arranged side by side in the wiring direction of the cable coupled to the main body.

According to such a configuration, the attachment portion to which the cable coupling member in the main body portion of the restraining member is fastened and the protruding portion that protrudes downward from the lower surface of the main body portion are connected to the main body portion by the cable coupling member. Arranged side by side in the routing direction. As a result, the cable is connected to the lower surface of the main body portion of the restraining member by the cable coupling member fastened to the mounting portion of the restraining member in a state in which the lock bolt is inserted into the through hole and fixed to the lock bolt. Ru is fixed to. When the cable coupling member is fastened to the restraining member, the cable is pressed upward by the cable coupling member and is lined up in the cable routing direction with respect to the cable coupling member while floating from the slope on the net. The cable can be held on the lower surface of the main body in a state where the cable is pressed downward by the protrusion of the restraining member. Thereby, it is possible to reliably restrain the cable so that it cannot move relative to the main body portion on the lower surface of the restraining member.

  It is preferable that the attachment portion has a hole or a slit penetrating the main body portion in the vertical direction.

  According to this configuration, when the cable coupling member has a configuration such as a U-bolt having a coupling portion such as a male screw portion, the male screw portion is inserted into the hole or slit of the mounting portion, and the nut is screwed into the male screw portion. By doing so, it is possible to easily attach the cable coupling member to the main body portion of the restraining member.

  Moreover, it is preferable that both the attachment part and the protruding part are provided on both sides of the through hole.

  According to this configuration, on both sides of the lock bolt inserted into the through hole of the restraining member, the state is pressed upward by the cable coupling member attached to the mounting portion and pressed downward by the protruding portion. Therefore, the cable can be held on the lower surface of the main body, and the cable can be firmly held by the restraining member.

The slope stabilization method of the present invention is a slope stabilization method for stabilizing a slope using the slope stabilization structure described above, wherein the respective embedded portions of the plurality of lock bolts are spaced apart from each other. A lock bolt burying step of burying in the ground of the slope, a net laying step of laying the net in a region where the plurality of lock bolts are embedded in the slope, and the cable on the net of the plurality of lock bolts A cable routing step that is routed in between, and the restraint member is positioned on the cable so that the male screw portion of the lock bolt penetrates the through hole of the restraint member. a restraining member mounting step for mounting the male screw portion, by screwing the nut on the external thread portion, and pressed toward the restraining member to the cable The fixed to the lock bolt in condition, and, with respect to the restraining member in a state of being fixed to the locking bolt, by fastening the cable coupling member to the lower surface of the main body portion, said cable, said net in a state where the top of floating from the slope, in a state of pressing downward by the projecting portion as well as pressed upward by the cable connecting member, comprise a cable holding step of holding the cable to the restraining member, the It is characterized by.

According to the feature, and routed between lock the cable on the net bolt, by screwing a nut onto the male threaded portion, fixed to the lock bolt in a state of being pressed toward the restraining member to the cable, and, The cable coupling member is fastened to the lower surface side of the main body portion of the restraining member with respect to the restraining member fixed to the lock bolt. As a result, the cable body is pressed upward by the cable coupling member in a state where it floats from the slope on the net and is pressed downward by the projecting portion that projects downward from the lower surface of the body portion. It is possible to hold it on the lower surface. As described above, the movement of the cable with respect to the main body portion can be restricted by receiving both the upper and lower pressing forces received from the cable coupling member and the protruding portion and restraining the cable on the lower surface of the restraining member. Therefore, when a force acts on the net from the slope due to landslides, the force is reliably transmitted from the net to the restraining member via the cable routed on the net, and finally the force is applied with a lock bolt. It is possible to receive.

  As described above, according to the present invention, when a force acts on the net from the slope, the force can be reliably transmitted from the net to the lock bolt.

It is a top view which shows one Embodiment of the slope stabilization structure of this invention. It is an enlarged plan view of the slope stabilization structure of FIG. It is sectional drawing of the lock bolt of FIG. 1, and restraint member vicinity. FIG. 3 is an enlarged plan view of the vicinity of the lock bolt and the restraining member of FIG. 2. FIG. 4 is an enlarged cross-sectional view of the vicinity of the restraining member and the cable coupling member of FIG. 3. It is an arrow B figure of FIG. FIG. 7 is an enlarged cross-sectional view of the cable coupling member and the vicinity of a protrusion in FIG. 6. It is a top view of the restraint member of FIG. It is a front view of the restraint member of FIG. It is a side view of the restraint member of FIG. It is a front view of the cable coupling member and nut of FIG.

  Hereinafter, embodiments of a slope stabilization structure of the present invention, a restraint member used therefor, and a slope stabilization method using the slope stabilization structure will be described with reference to the drawings.

  The slope stabilization structure 1 is a structure that is installed on a slope and stabilizes the slope. As shown in FIGS. 1 to 4, the slope stabilization structure 1 includes a plurality of lock bolts 2 embedded in a predetermined region of the slope, and at least one (a plurality in FIG. 1) net 3 that covers the slope. A plurality of cables 4 arranged between the lock bolts 2, a plurality of net coupling members 11 for coupling the net 3 to the cables 4, and a constraint for restraining the cables 4 while being fixed to the respective lock bolts 2. A member 5, a cable coupling member 6 attached to each restraining member 5, and a nut 7 attached to each lock bolt 2 are provided.

  The plurality of lock bolts 2 are respectively disposed at a plurality of positions separated from each other on the slope. For example, the plurality of lock bolts 2 are arranged in a staggered manner so that a triangle is formed by the three adjacent lock bolts 2. Specifically, the first row of lock bolts 2 are arranged so as to be aligned at a predetermined interval t along the width direction X of the slope, and the second row of lock bolts 2 are arranged on the slope valley side (lower side of FIG. 1). Side) along the width direction X for each intermediate position between the first row of lock bolts 2, and the second row of lock bolts 2 and the first row in the vicinity thereof. It arrange | positions so that the space | interval with the lock bolt 2 may also become the same space | interval t as the above. The lock bolts 2 in the third and following rows are also arranged in the same manner as the lock bolts 2 in the second row.

  As shown in FIGS. 3 to 5, each lock bolt 2 has an embedded portion 2 b embedded in the ground G of the slope and a male screw portion 2 a protruding from the embedded portion 2 b on the slope. For example, the embedded portion 2b is inserted into a vertical hole V formed in the ground G, and is fixed inside the ground G by a hardener injected into the vertical hole V. The embedded portion 2b is held so as to extend along the central axis of the vertical hole V inside the vertical hole V by a holding member 13 attached to the outer peripheral portion thereof.

  The net 3 covers a region where a plurality of lock bolts 2 are embedded on the slope. The area covered by the net 3 only needs to cover the area in which the lock bolt 2 is embedded, and cases where the area is slightly wider or narrower than that area are also included in the scope of the present invention.

  In the present embodiment, as shown in FIGS. 1 and 2, as the net 3, a plurality of belt-shaped plurality having a width slightly larger than the interval t of the lock bolt 2 in the width direction X of the slope and long in the direction Y of the slope. The net is used. These belt-like nets 3 are laid so as to extend in the mountain-valley direction Y on the slope, and are arranged so that the respective end portions overlap each other. The ends of the net 3 are coupled to each other by the coupling coil 12 shown in FIG.

  The plurality of cables 4 are routed between the plurality of lock bolts 2 on the net 3. Specifically, as shown in FIGS. 1 and 2 and 4, the cable 4 is routed while being bent in contact with the side surface 2 c of the lock bolt 2, thereby routing the cable 4. Changing direction. For example, in FIG. 1, each cable 4 is arranged in a zigzag so as to incline in the width direction X as it proceeds in the direction Y of the slope. In such zigzag routing, as shown in FIG. 4, the two cables 4 are bent while being in contact with the opposing portions of the side surface 2 c of the lock bolt 2 while sandwiching the one lock bolt 2. ing. The cable 4 may be routed by contacting the side surface 2c of the lock bolt 2 and bending it in a right angle direction.

  The plurality of net coupling members 11 are members that couple the net 3 to the cable 4. The net coupling member 11 only needs to be capable of coupling the net 3 to the cable 4. For example, a coil-shaped member such as a coupling coil may be used as the net coupling member 11.

  As shown in FIGS. 8 to 10, each restraining member 5 includes a main body portion 5 a and a protruding portion 5 b that protrudes downward from the lower surface 5 c of the main body portion 5 a. The restraining member 5 is made of cast iron, for example, and the main body portion 5a and the protruding portion 5b are integrally formed.

As shown in FIGS. 4 to 6, each restraining member 5 is arranged on the upper side of the cable 4 in a state in which the male screw portion 2 a of the lock bolt 2 penetrates a through hole 21 described later. The restraining member 5 is fixed to the lock bolt 2 while being pressed toward the cable 4 by a nut 7 screwed into the male screw portion 2a.

  The main body portion 5a is formed with a through hole 21 through which the male screw portion 2a of the lock bolt 2 can pass. The main body portion 5 a has a shape that abuts on the nut 7 that is screwed into the male screw portion 2 a that penetrates the through hole 21 and can be pressed downward by the nut 7. Specifically, the main body 5 a has a flat plate shape having an upper surface that can come into contact with the nut 7.

  The main body portion 5a has an attachment portion 22 to which the cable coupling member 6 can be attached. The attachment portions 22 are respectively provided on both sides of the through hole 21 (specifically, both sides in the mountain and valley direction Y as shown in FIGS. 4 and 8).

  The attachment part 22 should just have the shape which the cable coupling member 6 can attach to the lower surface of the main-body part 5a, for example, has a pair of slit which penetrates the main-body part 5a to an up-down direction. Each slit opens to the outer peripheral edge of the main body 5a. Around the back end of the slit, a nut 8 for fastening the cable coupling member 6 to the mounting portion 22 (specifically, a flange portion 8b extending outward from the lower end from the main body portion 8a of the nut 8 shown in FIG. 11). A counterbore 22a is formed in which the is fitted. Further, as shown in FIGS. 5 and 9 to 10, the cable 4 held by the cable coupling member 6 is stably held between the pair of slits on the lower surface 5 c of the main body portion 5 a. A friction increasing portion 25 for increasing the friction between the lower surface 5c and the cable 4 is formed so as to be held at 5c. The friction increasing portion 25 is formed by a plurality of irregularities, for example, convex portions or protrusions protruding from the lower surface 5c of the lower surface 5c of the main body portion 5a, or concave portions or grooves. Note that the attachment portion 22 may have a hole (such as a round hole) instead of the slit.

  The protrusions 5b are disposed at positions on both sides of the main body 5a with the through hole 21 interposed therebetween. Specifically, the protrusions 5b are respectively disposed between the attachment portion 22 and the through hole 21 on both sides of the through hole 21 in the direction in which the pair of attachment portions 22 are arranged as shown in FIG. Yes.

  9-10, the protrusion part 5b has the cable press part 23 which presses the cable 4, and the net engagement part 24 which can be engaged with the net | network 3. As shown in FIG.

  As shown in FIG. 9, the protruding length L <b> 1 from the lower surface 5 c of the main body 5 a in the net engaging portion 24 is longer than the protruding length L <b> 2 of the cable pressing portion 23. The net engaging portions 24 are disposed on both sides of the cable pressing portion 23, respectively.

  The attachment portion 22 and the protruding portion 5b formed on the main body portion 5a are arranged side by side in the wiring direction A (see FIGS. 6 and 10) of the cable 4 coupled to the main body portion 5a by the cable coupling member 6. Yes. In addition, both the attachment portion 22 and the protruding portion 5b are provided on both sides of the through hole 21, respectively.

The cable coupling member 6 is a member that couples the cable 4 to the restraining member 5 by being fastened to the restraining member 5. Specifically, as shown in FIG. 11, the cable coupling member 6 of the present embodiment includes an intermediate portion 6a having a width capable of receiving the cable 4 from below and both ends of the intermediate portion 6a. A pair of coupling portions 6b extending upward and coupled to the main body portion 5a. A male screw portion 6c is formed at the upper end of each coupling portion 6b. When the male screw portion 6c is inserted upward with respect to the main body portion 5a of the restraining member 5 and the nut 8 is screwed together, the cable coupling member 6 is engaged with the attachment portion 22 of the main body portion 5a. The cable coupling member 6 is formed of, for example, a U bolt, but is not limited to this in the present invention, and is configured to be able to couple the cable 4 to the restraining member 5 (that is, receive the cable 4 from below). And a pair of coupling portions extending upward from both ends of the intermediate portion 6a and coupled to the main body portion 5a of the restraining member 5).

  The cable coupling member 6 is disposed at a position in the vicinity of the protruding portion 5b by being attached to the attachment portion 22 on both sides of the through hole 21 in the main body portion 5a of the restraining member 5.

  When performing the slope stabilization construction method which stabilizes a slope using the slope stabilization structure 1 comprised as mentioned above, it is performed in the following procedures.

  First, the embedded portions 2b of the plurality of lock bolts 2 are embedded in the ground of the slope at positions spaced apart from each other (lock bolt embedded step).

  Next, the net 3 is laid in a region on the slope where the plurality of lock bolts 2 are embedded (net laying step).

  Next, the cable 4 is routed between the plurality of lock bolts 2 on the net 3 (cable routing step). In this embodiment, after that, the cable 3 is connected to the net 3 by the net connecting member 11 (net connecting step).

  Next, the restraining member 5 is attached to the male screw portion 2a of the lock bolt 2 (restraining member attaching step). Specifically, the restraining member 5 is attached to the male screw portion 2a so that the restraining member 5 is positioned on the cable 4 in a state where the male screw portion 2a of the lock bolt 2 penetrates the through hole 21 of the restraining member 5.

Finally, the nut 7 is screwed into the male screw portion 2a to fix the restraint member 5 to the lock bolt 2 while being pressed toward the cable 4, and to the restraint member 5 in a state of being secured to the lock bolt 2. On the other hand, by fastening the cable coupling member 6 to the lower surface side of the main body 5a of the restraining member 5, the cable 4 is pressed upward by the cable coupling member 6 in a state where it floats on the net 3 from the inclined surface. At the same time, the cable 4 is held by the restraining member 5 in a state of being pressed downward by the protrusion 5b (cable holding step). Thereby, the restraining member 5 can restrain the cable 4 in a state of being fixed to the lock bolt 2.

In the slope stabilization structure 1 and the slope stabilization structure 1 constructed by the construction method, the cable 4 is attached to the lower surface 5c of the main body 5a of the restraint member 5 in a state of being fixed to the lock bolt 2 by the cable coupling member 6. It is concluded . When the cable coupling member 6 is fastened to the restraining member 5, the cable 4 floats on the net 3 from the inclined surface (that is, the upper surface of the ground G in FIG. 6) as shown in FIG. 6. Then, it is held on the lower surface 5c of the main body 5a while being pressed upward by the cable coupling member 6 and pressed downward by the protrusion 5b. As a result, the cable 4 is firmly held on the lower surface of the restraining member 5 while simultaneously receiving the downward pressing force by the protruding portion 5b of the restraining member 5 and the upward pressing force by the cable coupling member 6. The force acting on the net 3 can be reliably transmitted to the restraining member 5. Finally, the force can be received by the lock bolt 2 via the restraining member 5.

(Characteristic)
(1)
According to the slope stabilizing structure 1 of the present embodiment, a plurality of cables 4 are routed between the lock bolts 2 on the net 3 . In a state where the captive member 5 is pressed towards the cable 4 secured by a nut 7 screwed to the male screw portion 2a of the lock bolt 2, with respect to the restraining member 5, the cable coupling member 6 of the restraining member 5 body By being fastened to the lower surface side of the portion 5a , the cable 4 is pressed upward by the cable coupling member 6 while floating from the slope on the net 3, as shown in FIG. It is held on the lower surface 5c of the main body portion 5a in a state of being pressed downward by a protruding portion 5b protruding downward from the lower surface 5c of 5a. In this way, the cable 4 is restrained by the lower surface of the restraining member 5 by receiving both the upper and lower pressing forces received from the cable coupling member 6 and the protruding portion 5b in a state of floating from the slope on the net 3 . The movement with respect to the main body 5a is restricted. Therefore, when a force acts on the net 3 from the slope due to landslides, the force is reliably transmitted from the net 3 to the restraining member 5 via the cable 4 routed on the net 3, and further, the restraining member 5 Therefore, the force can be finally received by the lock bolt 2. As a result, the force acting on the net 3 at a location far from the restraining member 5 can be reliably transmitted to the restraining member 5 via the cable 4 and finally received by the lock bolt 2, thereby reducing the possibility of the net 3 being swollen. , The effect of suppressing the fall of earth and sand is improved.

(2)
Since the slope stabilizing structure 1 of the present embodiment includes a plurality of net coupling members 11 that couple the net 3 to the cable 4, the force acting on the net 3 is applied to the cable 4 via the net coupling member 11. It is possible to communicate reliably.

  In the slope stabilization structure 1 of the present invention, the net coupling member 11 may not be provided. Even in this case, it is possible to transmit force from the net 3 to the cable 4 by contacting the cable 4 arranged on the net 3.

(3)
According to the slope stabilizing structure 1 of the present embodiment, the cable coupling member 6 extends upward from the intermediate portion 6a having a width capable of receiving the cable 4 from below and both ends of the intermediate portion 6a. A pair of coupling portions coupled to the main body portion 5a, and ends of the coupling portions are inserted upward with respect to the main body portion 5a and engaged with the main body portion 5a. Therefore, in a state where the intermediate portion 6a of the cable coupling member 6 receives the cable 4 from below, each end portion of the pair of coupling portions is inserted upward into the main body portion 5a of the restraining member 5 and engaged with the main body portion 5a. By doing so, it is possible to couple the cable 4 to the restraining member 5. Thereby, the operation | work which fixes the cable 4 to the lower surface 5c of the main-body part 5a of the restraint member 5 can be performed easily.

(4)
According to the slope stabilization structure 1 of the present embodiment, the cable 4 is routed in a state of being bent in contact with the side surface of the lock bolt 2, so that the cable 4 is placed between the plurality of lock bolts 2, for example. It is possible to perform routing easily while changing the routing direction such as zigzag or perpendicular direction. As a result, the cable 4 can be extended on the net 3, and as a result, the number of net coupling members 11 that couple the net 3 to the cable 4 is increased. It is possible to further strengthen the bonding state.

(5)
According to the slope stabilizing structure 1 of the present embodiment, the protruding portions 5b are arranged at positions on both sides of the through hole 21 in the main body portion 5a, and the cable coupling member 6 is in the vicinity of the protruding portion 5b on both sides. It is arranged at each position. Therefore, on both sides of the lock bolt 2 inserted into the through hole 21 of the restraining member 5, the main body portion is pressed upward by the cable coupling member 6 and pressed downward by the protruding portion 5 b. Since it is held by the lower surface 5c of 5a, it is possible to hold the cable 4 more firmly against the restraining member 5.

(6)
According to the slope stabilizing structure 1 of the present embodiment, the protruding portion 5b has the cable pressing portion 23 that presses the cable 4 and the net engaging portion 24 that can be engaged with the net 3. The protruding length L1 of the engaging portion 24 from the lower surface 5c of the main body 5a is longer than the protruding length L2 of the cable pressing portion 23. For this reason, the protruding portion 5b of the restraining member 5 is pressed by the net engaging portion 24 having a longer protruding length from the lower surface of the main body portion 5a than the cable pressing portion 23 while pressing the cable 4 downward by the cable pressing portion 23. It is possible to reliably engage with the net 3 located below 4. As a result, the force acting on the net 3 can be transmitted to the restraining member 5 via the cable 4 and directly transmitted to the restraining member 5 via the net engaging portion 24. Can be more reliably transmitted to the restraining member 5.

(7)
According to the slope stabilization structure 1 of the present embodiment, the net engaging portions 24 that are longer than the cable pressing portion 23 are arranged on both sides of the cable pressing portion 23. Therefore, the net engaging portion 24 prevents the cable 4 pressed downward by the cable pressing portion 23 from being displaced from the cable pressing portion 23 to either of the both sides and coming off from the lower position of the cable pressing portion 23. Is possible.

(8)
According to the restraining member 5 of the present embodiment, the attachment portion 22 to which the cable coupling member 6 in the main body portion 5a of the restraining member 5 is fastened, and the protruding portion 5b projecting downward from the lower surface 5c of the main body portion 5a, The cable 4 is arranged side by side in the wiring direction A (see FIGS. 6 and 10) of the cable 4 coupled to the main body 5a by the cable coupling member 6. As a result, the cable 4 is connected to the cable 4 by the cable coupling member 6 fastened to the mounting portion 22 of the restraint member 5 in a state where the lock bolt 2 is inserted into the through-hole 21 and fixed to the lock bolt 2. There Ru fixed to the lower surface 5c of the main body portion 5a of the restraining member 5. When the cable coupling member 6 is fastened to the restraining member 5, the cable 4 is pressed upward by the cable coupling member 6 while being lifted from the slope on the net 3, and against the cable coupling member 6. It is possible to hold the cable 4 on the lower surface 5c of the main body 5a in a state where the cable 4 is pressed downward by the protruding portion 5b of the restraining member 5 arranged in the wiring direction A of the cable 4. Thereby, it is possible to reliably restrain the cable 4 on the lower surface of the restraining member 5 so as not to move relative to the main body portion 5a.

(9)
According to the restraining member 5 of the present embodiment, the attachment portion 22 has a hole or a slit that penetrates the main body portion 5a in the vertical direction. Therefore, when the cable coupling member 6 has a configuration such as a U-bolt having a coupling portion such as a male screw portion 6c, the male screw portion 6c is inserted into the hole or slit of the attachment portion 22, and the nut 8 is inserted into the male screw portion 6c. The cable coupling member 6 can be easily attached to the main body 5a of the restraining member 5 by screwing.

(10)
According to the restraining member 5 of the present embodiment, both the attachment portion 22 and the protruding portion 5 b are provided on both sides of the through hole 21. Therefore, on both sides of the lock bolt 2 to be inserted into the through hole 21 of the restraining member 5, it is pressed upward by the cable coupling member 6 attached to the attachment portion 22 and pressed downward by the protruding portion 5 b. In this state, the cable 4 can be held on the lower surface 5c of the main body 5a, and the cable 4 can be firmly held by the restraining member 5.

(11)
According to the slope stabilization method of the present embodiment, the cable 4 is routed between the lock bolts 2 on the net 3, and the nut 7 is screwed into the male screw portion 2a, so that the restraining member 5 faces the cable 4. The cable coupling member 6 is fastened to the lower surface side of the main body portion 5a of the restraining member 5 with respect to the restraining member 5 fixed to the lock bolt 2 in a pressed state. The cable 4 is pressed upward by the cable coupling member 6 and is pressed downward by the projecting portion 5b projecting downward from the lower surface 5c of the main body 5a while floating on the net 3 from the slope. Can be held on the lower surface 5c of the main body 5a. In this way, by restraining the cable 4 on the lower surface of the restraining member 5 by receiving both the upper and lower pressing forces received from the cable coupling member 6 and the protruding portion 5b, the movement with respect to the main body portion 5a can be restricted. is there. Therefore, when a force acts on the net 3 from the slope due to landslides, the force is reliably transmitted from the net 3 to the restraining member 5 via the cable 4 and finally the force is received by the lock bolt 2. Is possible.

  In the slope stabilization method of the present invention, the net 3 may not be coupled to the cable 4 via the net coupling member 11. Even in this case, it is possible to transmit force from the net 3 to the cable 4 by contacting the cable 4 arranged on the net 3.

DESCRIPTION OF SYMBOLS 1 Slope stabilization structure 2 Lock bolt 3 Net 4 Cable 5 Restraint member 5a Main-body part 5b Projection part 6 Cable coupling member 7 Nut 11 Net coupling member 21 Through-hole 22 Attachment part 23 Cable press part 24 Net engagement part

Claims (11)

A slope stabilization structure installed on a slope to stabilize the slope,
A plurality of lock bolts having embedded portions embedded in the ground of the slope and male screw portions projecting from the embedded portion onto the slope;
A net covering an area where the plurality of rock bolts are embedded in the slope;
A plurality of cables routed between the plurality of rock bolts on the net;
A constraining member that has a through-hole through which the male screw portion can penetrate, is arranged on the upper side of the cable in a state where the male screw portion penetrates the through-hole, and restrains the cable in a state of being fixed to the lock bolt; ,
A cable coupling member that couples the cable to the restraining member by being fastened to the restraining member;
A nut that is screwed into the male screw portion and presses the restraining member toward the cable;
The restraining member includes a main body portion in which the through hole is formed and a protruding portion protruding downward from the lower surface of the main body portion, and the main body portion and the protruding portion are integrally formed ,
The cable coupling member is fastened to the lower surface side of the main body portion of the restraining member in a state where the restraining member is pressed and fixed toward the cable by the nut screwed into the male screw portion of the lock bolt. Accordingly, the cable is in a state where the top of the net is floating from the slopes, is retained by said cable coupling member while being pressed downward by the projecting portion while being pressed upward to the underside of the body portion The
A slope stabilization structure characterized by that. A plurality of net coupling members for coupling the net to the cable;
The slope stabilization structure according to claim 1. The cable coupling member includes an intermediate portion having a width capable of receiving the cable from below, and a pair of coupling portions extending upward from both ends of the intermediate portion and coupled to the main body portion, An end portion of each coupling portion is inserted upward with respect to the main body portion and engaged with the main body portion.
The slope stabilization structure according to claim 1 or 2. The cable is routed in a bent state in contact with the side surface of the lock bolt,
The slope stabilization structure according to any one of claims 1 to 3. The protrusions are respectively arranged at positions on both sides of the main body with the through hole interposed therebetween,
The cable coupling members are respectively arranged at positions in the vicinity of the protrusions on the both sides.
The slope stabilization structure according to any one of claims 1 to 4. The protruding portion has a cable pressing portion that presses the cable, and a net engaging portion that can be engaged with the net.
The protruding length from the lower surface of the main body portion in the net engaging portion is longer than the protruding length of the cable pressing portion,
The slope stabilization structure according to any one of claims 1 to 5. The net engaging portion is disposed on both sides of the cable pressing portion,
The slope stabilization structure according to claim 6. The male screw part protruding on the slope of the lock bolt embedded in the ground has a through-hole that can be penetrated, and abuts against a nut that is screwed into the male screw part that penetrates the through-hole and is pressed downward by the nut. A main body having a shape capable of
A projecting portion projecting downward from the lower surface of the main body,
The main body and the protrusion are integrally formed,
The main body portion has a mounting portion having a shape in which a cable coupling member for coupling a cable to the main body portion can be fastened to the lower surface of the main body portion,
The attachment portion and the protruding portion are arranged side by side in a cable routing direction of the cable coupled to the main body portion by the cable coupling member.
A restraining member characterized by that. The mounting portion has a hole or a slit penetrating the main body portion in the vertical direction.
The restraint member according to claim 8. Both of the mounting portion and the protruding portion are provided on both sides of the through hole,
The restraint member according to claim 8 or 9. A slope stabilization method for stabilizing a slope using the slope stabilization structure according to claim 1,
A lock bolt embedding step of embedding each embedded portion of the plurality of lock bolts in the ground of the slope at a position spaced apart from each other;
A net laying step of laying the net in an area where the plurality of lock bolts are embedded in the slope;
A cable routing step for routing the cable between the plurality of lock bolts on the net;
A restraining member attaching step of attaching the restraining member to the male screw portion so that the restraining member is positioned on the cable in a state where the male screw portion of the lock bolt penetrates the through hole of the restraining member;
By screwing the nut into the male screw portion, the restraining member is fixed to the lock bolt while being pressed toward the cable, and the restraining member is fixed to the lock bolt. By fastening the cable coupling member to the lower surface side of the main body portion, the cable is pressed upward by the cable coupling member while being floated from the slope on the net, and by the projecting portion. a state of pressing down, and the cable holding step of holding the cable to the restraining member,
A slope stabilization method characterized by including

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