JP6823329B1 - Slope stabilization method using rock bolt displacement detector and its displacement detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a displacement detector of a rock bolt which catches a sign of a mountain slope collapse due to an earthquake or rainfall, and a slope stabilization method using the displacement detector, and to improve a wire binding method. It is now possible to visually observe deformations such as collapses caused by earthquakes and rainfall on the slopes. SOLUTION: In a rock bolt displacement detector and a slope stabilization method using the same, four lock bolts 1 "1a to 1d" are driven into a quadrangle on a slope G, and a wire 2 is wound around the lock bolt. The quadrangular frame R "R1 to R4" is formed by hanging, and the vicinity of both terminals 21 and 21 of the wire 2 located on the lower side R4 of the quadrangular frame is arranged in two rows and mounted in the concave groove 4 to attach the holding tool 3. The wire terminal 21 protruding from the holding tool is fixed by the caulking member 6, and the displacement detecting member 7 is attached between the holding tool 3 and the caulking member 6 to form the quadrangular frame unit A. , This is connected in a staggered arrangement and laid. [Selection diagram] Fig. 1

Description

The present invention relates to a rock bolt displacement detector that catches a sign of a mountain slope collapse due to an earthquake or rainfall, and a slope stabilization method using the displacement detector, and is referred to as a wire rope (hereinafter referred to as "wire"). ) Has been improved so that deformations such as collapses that occur on slopes can be visually observed.

Generally, in the slope stabilization method, a lock bolt is inserted and fixed to the slope as in Patent Document 1, and a bearing plate attached to the head of the lock bolt and a wire stretched on the slope surface are connected to stabilize the slope. In the chemical structure, Patent Document 1 states that a wire is inserted into a rope insertion hole formed in a bearing plate, a flange member is attached and fixed to the wire in the vicinity of the wire insertion hole, and the flange member interferes with the bearing plate. Restricts the relative movement of the bearing plate and the wire along the rope axis.

Further, in Patent Document 2, a lock bolt is driven into a mountain slope, and a net is stretched on the lock bolt to stabilize the slope. The net is formed by combining a plurality of ring-shaped ring units without fixing them. At the combination of the two ring units, the net is stretched so that the lock bolt is inserted between the two ring units.

Japanese Unexamined Patent Publication No. 2016-14249 (Patent No. 6202754) Japanese Unexamined Patent Publication No. 2002-242191 (Patent No. 3566219)

However, in Patent Document 1, the connection between the lock bolt and the wire and the wire which is the slope work depends on the fixing with the cross clip or the U-shaped clip, which is insufficient. Therefore, when the lock bolt is mutated. The wire and the wire, which are slopes, cannot sufficiently suppress the displacement of the lock bolt. The cross clip and the U-shaped clip are used only for positioning, and when a force is applied to the wire, the fixed portion of the cross clip or the U-shaped clip comes off at an initial stage. Therefore, since the lock bolt is displaced, deformed, or the like due to the movement of earth and sand, there is a high possibility that the peripheral frictional resistance is cut and the lock bolt collapses.

Further, in Patent Document 2, it is practically difficult to drive a lock bolt to be inserted into a through hole for a lock bolt into two ring units formed by overlapping corner portions before stretching the ring unit on a mountain slope. is there. The reason is that with a ring unit that is shape-retaining and the dimensions of each side are set, it is difficult to flexibly respond to changes in mountain undulations and slope angles, and because of its type, the lock bolt is driven in first. Is difficult. In addition, it is difficult to accurately pierce the undulating slope at the intervals of the corners of the ring, and it is the actual situation that the lock bolt is inserted and solidified after injecting cement milk or mortar into the undulating slope.

The first aspect of the present invention is to drive four lock bolts on a slope into a quadrangle that allows a long rectangle in the vertical direction in a lock bolt displacement detector, and to connect a wire to the lock bolt into a quadrangle that allows a rectangle. In addition to wrapping it so that it becomes, the vicinity of both ends of the wire located on the lower side of the rectangle is arranged in two rows and attached to the concave groove, and it is sandwiched through the clamp with bolts, and it protrudes from the clamp. The wire terminal is fixed with a tubular caulking member, and a displacement detection material is attached between the holding tool and the caulking member to form a quadrangular frame unit. The caulking member referred to here means a member that crimps and fixes a tubular body attached to a wire with a tool.

The second aspect of the present invention is the displacement detector of the lock bolt according to the first invention to the second invention of the present application, in which the vicinity of the end of the wire protruding outward from the holding tool is folded back in an arc shape to form an annular shape. The terminal is fixed together with two wires near the terminal with a tubular caulking member.

The third aspect of the present invention is for transmitting the stress of the lock bolt to another lock bolt in the slope stabilization method using the lock bolt displacement detector according to any one of the first invention to the second invention. In the method, four lock bolts are driven into a quadrangle that allows a vertically long rectangle on the slope, and a wire is wound around the lock bolt so that the quadrangle is possible, and at the bottom of the quadrangle. The vicinity of both terminals of the located wire is arranged in two rows, mounted in a concave groove, sandwiched via a holding tool with a bolt, and both terminals of the wire protruding from the holding tool are inserted into a tubular caulking member. A displacement detection material is attached to the wire between the holding tool and the caulking member to form a first quadrangular frame unit, and a second quadrangular frame unit having the same size and shape as the first quadrangular frame unit is formed. In order to superimpose a part on the first quadrangular frame unit, one of the four lock bolts constituting the second quadrangular frame unit is placed in the substantially center of the first quadrangular frame unit. One of the four lock bolts constituting the first quadrangular frame unit is formed into a pair of quadrangular frame units so as to be located substantially in the center of the second quadrangular frame unit, and the wires of the pair of quadrangular frame units are formed. To transfer the stress of the lock bolt to other lock bolts by tying the points where they intersect with each other with a quadrangle clip and a fastener consisting of a quadrangular member that crimps and fixes the wire close to the outer surface of the quadrangle clip. It was done.

The fourth aspect of the present invention is the first quadrangle frame unit and the second quadrangle in the third slope stabilization method using the lock bolt displacement detector according to any one of the first to second inventions of the present application. The frame units were laid in a staggered arrangement, and the intersections of the wires of the first square frame unit and the second square frame unit that overlap each other were fastened with a fastener consisting of a clip and a wire caulking member adjacent to the outside of the clip. It is a thing.

Fifth of the present invention is a slope stabilization method using a lock bolt displacement detector according to any one of the first to fourth inventions of the present application, for fixing floating stones on a slope and preventing the slope from rising during an earthquake. When considering, in a quadrilateral frame unit that allows a pair of rectangles, three wires are sandwiched between the lock bolt in the center of the first quadrilateral frame unit and the lock bolt in the center of the second quadrilateral frame unit. Are laid at equal intervals, and one wire is laid in each of the vertical directions with the lock bolt and the lock bolt of the second quadrangular frame unit sandwiched between them to form a wire net body of 1 square 50 cm square. ..

Since the present invention has the above configuration, it has the following effects.
First, if a displacement detection material is provided at the portion of the wire that is wound around the lock bolt to form a quadrangular frame that allows a rectangle to hold both ends, the wire will move due to the displacement of the lock bolt. The displacement can be easily visually observed by deforming or breaking the displacement detecting material. This is because the lock bolt had no concept of maintenance until now, but it is possible to easily and accurately know that the displacement of the lock bolt has occurred in the future.

The displacement detection material functions regardless of the combination of the conventional quadrangular ring units, and also functions as a single unit for each quadrangular frame unit. Since it is provided in all the quadrangular frame units, the entire slope or a part thereof You can catch the signs of collapse.

Secondly, in the present invention, instead of stopping the wire at the bearing plate portion as in the conventional method, the wire is installed so as to wind four lock bolts installed in a square shape, and the vicinity of both terminals is sandwiched between the two terminals. A pair of pinching and fixing the end of the wire by caulking with a caulking member, transmitting the displacement of the lower two lock bolts to the upper two lock bolts, and fixing these four upper, lower, left and right lock bolts with a wire. The continuum of square frame units can transmit stress in the vertical direction and stabilize the entire slope.

Thirdly, the first quadrangular frame unit in the staggered arrangement is overlapped with a corner of about a quarter of the second quadrangular frame unit in the staggered arrangement, and the intersection where the wires intersect vertically and horizontally is connected with a binder. Fix it. As a result, the entire slope of the mountain is covered with an integrated slope work, and is securely connected to the lock bolt.

Fourth, the crossing portion formed by connecting the second quadrangular frame units partially overlapped with the first quadrangular frame unit according to the present invention is bound by a clipper, and further covered and stacked horizontally on the unit. Multiple squares are formed by binding the intersections of the wires installed in the direction and the vertical direction and the intersections of the vertical and horizontal wires with the wires of the quadrangular frame unit with clips, and the slopes are higher than the squares by the conventional method. It is easy to get used to and the workability can be greatly improved.

Fifth, it is recognized that a large load was applied to the lock bolt at the end of the net in the collapse cases that occurred on the slope of the mountain so far, and in the conventional product, the lock bolt and the wire and the wire are connected. Although it was not certain, in the present invention, the lock bolt and the wire can be surely connected and fixed by the binding tool.

It is a top view which provided the displacement detector of the lock bolt which concerns on this invention on the lower side of the quadrangular frame unit which makes a rectangle possible. It is a top view which laid the 2nd quadrangular frame unit which has substantially the same shape as the 1st quadrangular frame unit of FIG. 1 by overlapping a part (a quarter) of the 1st quadrangular frame unit. It is a top view in which a part of the displacement detector of the lock bolt provided near the wire terminal on the lower side of the quadrangular frame unit is broken. It is a top view of the state in which the wire moves with the displacement of the lock bolt from the state of FIG. 3 and the displacement detection material is deformed. It is a top view which shows the other embodiment of the wire terminal of FIG. FIG. 5 is a plan view of a state in which the wire moves with the displacement of the lock bolt from the state of FIG. 5 and the displacement detection material is deformed. It is sectional drawing which follows the 7-7 line of FIG. It is a perspective view of the displacement detection material. It is a perspective view which shows the other embodiment of the displacement detection material of FIG. It is a plane schematic view which shows the state which laid the 1st quadrangular frame unit in a staggered arrangement among a pair of quadrangular frame units. It is a plane schematic view which shows the state which laid the 2nd quadrangular frame unit in a staggered arrangement among a pair of quadrangular frame units. FIG. 5 is a schematic plan view in which a pair of quadrangular frame units is formed by superimposing a part of the second quadrangular frame unit on the first quadrangular frame unit of FIG. 12 is a schematic plan view showing an outer intersection of the quadrilateral frame unit other than the vertical and horizontal intersections of the wires of the first quadrilateral frame unit and the second quadrilateral frame unit in FIG. It is an enlarged view which shows a part of FIG. FIG. 5 is a schematic plan view in which a plurality of wires are laid vertically and horizontally at set intervals in a group of quadrangular frame units that allow a pair of rectangles in FIG. FIG. 5 is a schematic plan view of a wire net body in which grid-like squares are formed by a pair of rectangular frame units shown in FIGS. 12, 14 and 15. It is a schematic plan view which shows the binding tool which consists of a cross clip and a caulking member which binds the place where the wire intersects vertically and horizontally in a pair of quadrangular frame units. It is a top view which shows an example of the binder of FIG. It is a side view of FIG.

In FIG. 1, the basic shape is a quadrangle in which the four lock bolts 1 (1a to 1d) are rectangular, and the width W in the horizontal direction is 2 m and the length L in the vertical direction is 4 m. The wire 2 is placed on the slope G so as to be so as to be, and the wire 2 wound around each lock bolt 1a to 1d is placed in the vicinity of both terminals 2 ₁ and 2 ₁ of the wire on the lower side R ₄ of the rectangular frame R (R _{1 to} R ₄ ). It is sandwiched by a sandwiching tool 3 having a concave groove 4 in parallel.

The quadrangle that allows a rectangle with the above four lock bolts 1 (1a to 1d) is based on this, but the slope G of the mountain has undulations such as unevenness, and there are standing trees. Therefore, the rectangular frame units of FIGS. 1 or 2 cannot always be formed into an orderly rectangular frame unit group as shown in FIGS. 10 to 13, and may be trapezoidal or deformed quadrangles, but FIG. 1 is preferable. It is a rectangular frame A of.

A lock for forming a second rectangular frame unit A'which has exactly the same configuration as the quadrangular frame unit A which allows a rectangular frame by a wire 2 wound around the first lock bolt 1 (1a to 1d). Of the bolts 1'(1a' to 1d'), one lock bolt 1a'on the upper left side is 1 m in the middle of the horizontal width W2 m in the horizontal direction of the first quadrangular frame unit A and the length L4 m in the vertical and vertical directions. A part of the first quadrangular frame unit A and the second quadrangular frame unit A'formed by casting at the center position of 2 m in the middle, that is, about a quarter of the area overlaps (Fig.). 2). In this case, the lock bolts 1a to 1d of the first quadrangular frame unit A and 1a ′ to 1d ′ of the second quadrangular frame unit A ′ are placed in a staggered arrangement. The staggered arrangement referred to here means that the quadrangular frames to be laid via the lock bolts to be driven and the lock bolts are arranged in a zigzag pattern or alternately (see FIGS. 2, 10 to 15). ).

In FIG. 1, a hole is formed in the lock bolt 1 at a depth of about 3 m to 5 m depending on the condition of the slope, an injection material such as cement milk or mortar is injected into the hole, and then a steel rod is inserted. It is solidified and placed. As the wire 2, a wire having a diameter of 8 mm to 12 mm is used.

3, 4, 7, Kyojigu 3 respectively two rows grooves 4.4 of provided 3 ₁ - 3 ₂ mating surfaces members split, the upper member 3 ₁ between the grooves of the two rows bolt through a hole 3n to, are tightened through the bolt 5 at a screw hole 3m on the lower member 3 _2.
Moreover, the caulking member 6 has a swaged tubular body to the retaining fitted to both terminals 2 ₁ - 2 ₁ of the wire 2 is protruded from Kyojigu 3 outwardly.

5 and 6 show an elliptical shape that is projected outward from the holding tool 3 and the terminals 2 ₁ and 2 ₁ of the wire 2 are folded back in an arc shape and fitted into the annular caulking member 6 to prevent them from coming off. It is set to 6n.

FIG displacement detecting material 7 of 7, the plastic cylindrical body which is lacking a part 7 ₁ of its cross section, Aru which was mounted between the clamping device 3 and the caulking member 6. Instead of the above cylinder, the compression coil spring 8 of FIG. 9 can be attached to the wire 2 to be used as the displacement detection material 7.

FIG. 10 shows a state in which a plurality of first quadrangular frame units A of the pair of quadrangular frame units A and A ′ of FIG. 2 are connected and laid on the slope G of the mountain in a staggered arrangement. In FIGS. 10 to 13, for convenience of drawing, the four lock bolts 1a to 1d in the first quadrangular frame unit A are indicated by black circles “●”, and the four locks in the second quadrangular frame unit A ′. Bolts 1a'to 1d' are indicated by white circles "○".

In FIG. 10, lock bolts 1a to 1d for forming the first quadrangular frame unit A are placed on the slope G in a staggered arrangement.

Further, the first quadrangular frame A having a width W2 m and a length L4 m formed by the lock bolts 1 (1a to 1d) is arranged in a staggered manner (FIG. 10).

Then, the second quadrangular frame A'formed by the lock bolts 1'(1a' to 1d') having a width of W2 m and a length of L4 m is arranged in a staggered manner (FIG. 11).

FIG. 11 shows a state in which the first quadrangular frame unit A in FIG. 10 is omitted and the second quadrangular frame unit A'is laid in a staggered arrangement on the slope G of the mountain with a plurality of corners connected. There is.

FIG. 12 shows a staggered arrangement in which the first quadrangular frame unit A of FIG. 10 and the second quadrangular frame unit A'of FIG. 11 are overlapped with a part (about a quarter of the quadrangular frame). And laid.

FIG. 13 shows an intersection of wires outside the quadrilateral frame unit other than the vertical and horizontal intersections of the wires 2 of the first quadrilateral frame unit A and the second quadrilateral frame unit A', and a stopper 9'thereof.

FIG. 14 is a partially enlarged view of a pair of quadrangular frame units A and A'groups, and the points where the wires of the first quadrangular frame unit A and the second quadrangular frame unit A'intersect are fastened with a binding tool. Indicates the state.

FIG. 15 shows a state in which a plurality of wires 2L', 2L ", and 2W'. 12W" are laid in a group of quadrangular frame units A and A'that allow a pair of rectangles while maintaining a set interval in the vertical and horizontal directions.

In FIG. 16, a wire net N forming a grid of about 50 cm per square is laid.

17 to 19 show a binding tool including a cross clip 10 and a caulking member 11 for binding the points C where the wires 2 intersect vertically and horizontally in the pair of quadrangular frame units A and A'.

The four lock bolts 1 (1a, 1b, 1c, 1d) shown in FIG. 1 are placed on the slope G of the mountain so as to form a quadrangle that allows a rectangle having a horizontal direction W of 2 m and a vertical direction L of 4 m. To do. The wire terminals are tightly connected at the lower side of the quadrangle around which the wire 2 is wound on the outside of the four lock bolts 1 (1a, 1b, 1c, 1d) that have been driven into the quadrangle frame R (R _{1 to} R ₄ ). The lock bolt 1 is a bolt used for tightening a bearing plate or a quadrangular frame of a wire for pressing against a mountain slope G where loosening or collapse is expected.

For the above wire 2, a steel stranded wire having a diameter of about 8 mm to 12 mm is used, and the total length is secured in addition to the outer peripheral length of the quadrangle (about 12 m) and the length of at least two displacement detection materials 7. The length to be used. Then, the left and right as the basic form lateral direction W is 2m, the vertical longitudinal direction L are four of the lock bolt 1 of 4m (1a, 1b, 1c, 1d) after wound around the outside of both terminal wires 2 in lower _{R 4} 2 ₁・ 2 ₁ is sandwiched by the sandwiching tool 3 to form the first square frame unit A (FIG. 1).

Pincer 3 above, respectively two rows grooves 4.4 of provided 3 ₁ - 3 ₂ mating surfaces members split, drilled bolt insertion holes 3n on the upper member 3 ₁ between the grooves of the two rows , drilled screw holes 3m on the lower member 3 _2, are tightened by screwing bolts 5 passing through its hole 3n into the screw holes 3m.
Moreover, the caulking member 6 has a swaged tubular body to the retaining fitted to both terminals 2 ₁ - 2 ₁ of the wire 2 is protruded from Kyojigu 3 outwardly.

In this state, if the lower two lock bolts 1c and 1d move downward (arrow ↓) due to the collapse of the slope, if the upper two lock bolts 1a and 1b try to support the wire, Although the total length of 2 is extended, it stops at the holding tool 3 and suppresses the displacement of the lower two lock bolts, but the end face shown in FIG. 8 is circular and a part thereof is missing in the length direction. The displacement detection material 7 of the cylinder is made of a material such as plastic that is deformed or crushed and broken when a certain amount of pressure is applied, and is sandwiched between the caulking member 6 and the holding tool 3. It is crushed and deformed or broken into pieces. Since the state in which the displacement detection material 7 is crushed or crushed can be visually confirmed, it is time to investigate the soundness of at least the two lock bolts on the lower left and right sides of the quadrangular frame unit A and A'. You can see that.

In the case of the compression coil spring 8 as shown in FIG. 8 instead of the displacement detection material 7 of the cylinder shown in FIG. 7, the stretched coil spring is in a compressed and reduced state. If it can be visually confirmed, it can be confirmed that some displacement has occurred in the lock bolt 1.

In FIG. 10, five first rectangular frame units A (see FIG. 1) are laid in the horizontal direction on the uppermost stage of the slope G, and three first rectangular frame units A are laid in the vertical direction at the left end of the figure. It is done. Further, a maximum of 5 units and a minimum of 1 unit are continuously laid in the diagonal direction. In the drawing, the lock bolts 1 (1a to 1d) forming the first quadrangle are indicated by black circles “●”.

In FIG. 11, five second rectangular frame units A'(see FIG. 2) are laid in the horizontal direction, and three first rectangular frame units A are laid in the vertical direction at the left end of the figure. Then, five pairs of rectangular frame units A and A'are laid in the horizontal direction and two in the vertical direction. Then, a maximum of 4 units and a minimum of 1 unit are laid in succession diagonally. In the drawing, the lock bolts 1 (1a to 1d) forming the second quadrangle are indicated by white circles “◯”.

FIG. 12 shows a state in which the first quadrangular frame unit A of FIG. 10 and the second quadrangular frame unit A'of FIG. 11 are overlapped and laid, and the wires-2 of both quadrangular frame units A and A'. The point C where 2 intersects is fixed by the binding tool 9.

13 and 14 show that the lock bolt 1c of the upper quadrangular frame unit A and the lock bolt 1a of the next quadrangular frame unit A are connected by the vertical auxiliary wire 2'on the outer circumference of the pair of rectangular frame units A and A'group. A U-shaped auxiliary that is connected and the middle of the auxiliary wire 2'is wound around the lock bolt 1c'of the upper second quadrangular frame A'and the lock bolt 1a'of the lower quadrangular frame A'in a U-shape. One end of the wire 2 m is bound with a known stopper 9'. The other end of the U-shaped auxiliary wire 2 m is bound to the wire on the vertical side of the next first quadrangular frame unit A with a stopper 9'.

Similarly, on the outer circumference of the pair of rectangular frame units A and A'groups shown in FIGS. 13 and 14, the lock bolts 1b and 1a of A and A of the first rectangular frame units adjacent to each other at the uppermost interval are laterally assisted wires. Connected by 2 ″, the middle of the auxiliary wire 2 ″ is wound around the lock bolts 1b ′ and 1a ′ of the second quadrangular frame units A ′ and A ′, and the upward groove (channel) shape, that is, the corners are angular. One end is bound to the U-shaped auxiliary wire 2n with a stopper 9'. Note that the other end of the U-shaped auxiliary wire 2n is unity at stop 9 'in the upper side R ₁ of the wire of the first quadrangular frame unit A to the right.

Further, on the outer circumference of the pair of rectangular frame units A and A'groups of FIGS. 13 and 14, at the left end of the uppermost stage, an inverted L-shaped auxiliary wire 2 ^O wound around the second rectangular frame unit A'.
The upper end of the square frame unit A is bound to the upper side R ₁ of the quadrangular frame unit A, and the left end of the auxiliary wire 2 ^O is bound to the vertical side R ₂ of the quadrangular frame unit A with a stopper 9'.

In FIG. 15, the lock bolts 1a'and 1b' of the second rectangular frame unit A'are sandwiched in the center of the pair of rectangular frame units A, and three wires 2W' are placed on the upper side and three wires 2W'on the lower side in the lateral direction. The lock bolts 1a ′ ・ 1c ′ are laid at equal intervals, and one wire 2L ′ ・ 2L ″ is laid on each of the left and right sides thereof at equal intervals in the vertical direction. Only two rectangular frame units A and A'are displayed on the left and right of the uppermost row, and the rest are omitted. Also, the display of the upper and lower wires 2'and the left and right wires 2'in FIGS. 11 and 12 is omitted. is there.

In FIG. 16, innumerable substantially square squares having a side of about 50 cm are formed by the wires 2 laid vertically and horizontally on the slope G shown in FIG. In the drawing, only two pairs of rectangular frame units A and A'are displayed on the left and right of the uppermost row, and the rest are omitted.

[Specific construction example 1] "Placing a lock bolt and forming a pair of rectangles (FIGS. 1 and 10 with wires removed)"
(1) Lock bolts 1a and 1b are placed on the uppermost stage of the slope G of the mountain in the left-right lateral direction with a width W at intervals of 2 m.
(2) Lock bolts 1c and 1d are placed at intervals of 4 m in the vertical direction below the slope G at intervals of 4 m, and width W is placed at intervals of 2 m in the left-right and horizontal directions. This makes the first rectangle staggered.
(3) In the above steps (1) and (2), lock bolts 1 (1a ・ 1b and 1c ・ 1d) are placed in the second and third stages with an interval of 4 m.
(4) Lock bolts 1a'and 1d' for manufacturing the second rectangular frame unit A'are placed at intervals of 2 m in the left-right lateral direction at the center position of the first quadrangle.
(5) The lock bolts 1c ′ ・ 1d ′ are driven in from the lock bolts 1a ′ ・ 1d ′ of the above (4) at intervals of 4 m in length L in the vertical direction. This makes the second rectangle staggered.

[Specific construction example 2] "Molding of the first rectangular frame unit A and the second rectangular frame unit A'(FIG. 2)"
(6) The wire 2 is wound around the outside of the lock bolts 1a to 1d forming the first rectangle, and the vicinity of both terminals 2 ₁ and 2 ₁ is positioned on the lower side of the lock bolts 1c and 1d.
(7) On the lower side of the lock bolts 1c and 1d, the vicinity of both terminals 2 ₁ and 2 ₁ of the wire 2 wound in a quadrangle is sandwiched between the groove 4 of the holding tool 3 and the bolt 5 is sandwiched by the lower member of the holding tool. The wire terminal 2 ₁ cannot be pulled out by caulking with the caulking member 6 leaving the length up to both terminals 2 ₁ and 2 ₁ (corresponding to the length of the displacement detection material 7). Fix it like this. The wire 2 sandwiched in the concave groove 4 has a structure that moves in the concave groove 4 when a strong tensile force acts on the wire 2.
(8) after mounting the cylindrical displacement detecting material 7 between the clamping device 3 and the two terminals 2 _1, 2 _1, fitted with two terminal 2 cylindrical retaining member 7 with the terminal fixing member 6 to ₁ The first quadrangular frame unit A is formed by caulking the tubular shape so that the displacement detection material 7 does not come off. This molding process is sequentially and continuously performed.
(9) The second rectangular frame unit A'is formed in the same steps as in (6) to (7) above. As a result, a pair of square frame units A and A'groups are formed (FIGS. 10 and 11).
(10) Here, in a pair of rectangular frame units A and A'groups as shown in FIGS. 11 and 12, a lock forming a rectangle between lock bolts other than adjacent rectangular frame units and a wire 2 at the center of the bolts. Wires 2 and 2 are bound at points where the intersection C with one of the bolts 1 (1a to 1d) intersects vertically and horizontally with a holding tool 9 (FIGS. 15 to 17) composed of a cross clip 10 and a caulking member 11.

In FIG. 14, the vertical auxiliary wire 2'is a lock bolt 1c for forming a quadrangular frame A at the upper left end (see FIG. 12 “the same applies hereinafter”) and a lock bolt 1a for forming a quadrangular frame A laid below the lock bolt 1c. It is a wire that connects. The lateral auxiliary wire 2 ″ is a wire that connects the lock bolt 1b that forms the uppermost quadrangular frame A and the lock bolt 1a that forms the quadrangular frame A that is adjacent in the lateral direction.
²ⁿ is an upward groove-shaped (or downward groove-shaped) auxiliary wire wound around the lock bolt 1b'of the second quadrangular frame A'and the lock bolt 1a'of the second quadrangular frame A'at the uppermost stage. , The tip thereof is bound to the lateral auxiliary wire 2 "and the upper side R ₁ (or lower side R ₄ ) of the first quadrangular frame second from the left with known clips.
The 2 ^m is a U-shaped (or inverted U-shaped) tip that is wound around the lock bolt 1c'of the first quadrangular frame A'at the uppermost stage and the lock bolt 1a'of the quadrangular frame A'at the lower stage. Is bound to the vertical auxiliary wire 2'and the wire on the left vertical side R ₂ (or right vertical side R ₃ ) of the lower quadrangular frame A.
^Reference numeral 2o is an inverted L-shaped (or L-shaped) auxiliary wire at the left end of the uppermost stage, which is wound around the lock bolt 1a'of the second square frame unit A'and the lock bolts 1a and 1b of the square frame A. And the tip of the auxiliary wire is tied with a stopper between the lock bolts 1a and 1c.

[Concrete construction example 3] (Construction of slope stabilization structure)
(11) Next, in the pair of rectangular frame units A and A'as shown in FIG. 13, a total of six wires 2w', three each above and below the lock bolts 1a'and 1d at the center of each rectangular frame.・ 2w ″ laid at equal intervals in the left and right horizontal directions, and two wires 2L ′ ・ 2L ″, 2L ″ ・ 2L ⁿ in the vertical direction, one on each side of the lock bolt 1a ′ ・ 1d. Lay at regular intervals.
(12) By the construction of (6) to (11) above, a wire net body N having a width W'and a length L'with a square of about 50 cm is laid at the setting location of the slope G of the mountain (12). FIG. 15).

Although the present invention shows a rectangular frame and a rectangular frame unit by winding four lock bolt wires, it can also be implemented with a trapezoidal or other modified quadrangular frame unit.

1 ... Lock bolts 1a to 1d ... Lock bolts forming the first quadrangle 1a'to 1d' ... Lock bolts forming the second quadrangle 2 ... Wire 2 ₁ ... Wire terminal 2'... Vertical auxiliary wire 2 "... Horizontal auxiliary wire 2 ^m ... U-shaped or inverted U-shaped auxiliary wire 2 ⁿ ... Upward groove-shaped or downward groove-shaped auxiliary wire 2 ^O ... L-shaped or inverted L-shaped auxiliary wire 3 ... Provided near the end of the wire Holding tool 4 ... Recessed groove of holding tool 5 ... Bolt for tightening the upper and lower members of the holding tool 6 ... Caulking member 6n ... Wire terminal folded back in an arc shape and crimped into a ring shape 7 ... Displacement detection material 8 ... Compression coil spring 9 ... Tightening Tool (consisting of a cross clip and a caulking member)
9'... Wire stopper on the outside of the square frame unit 10 ... Cross clip 11 ... Caulking member 12 ... Bolt A ... First square frame unit A'... Second square frame unit C ... Wire intersection G ... Slope L ... Vertical length of the first quadrilateral frame unit L'... Vertical length of the wire net composed of a pair of quadrilateral frame units R ... Rectangle frame R1 ... Top side of the quadrangle frame R2 ... Right side of the quadrangle frame R3 ... Left side of quadrangle frame R4 ... Bottom side of quadrangle frame N ... Wire net body W ... Width of first quadrilateral frame unit in the left-right direction W'... Width of wire net consisting of a pair of quadrilateral frame units in the left-right direction

Claims (2)

Four lock bolts (1 "1a to 1d") are driven into a quadrangle on the slope (G), and a wire (2) is wound around the lock bolts (1 "1a to 1d") to form a rectangle having a lower side. Both the wire (2) located on the lower side (R ₄ ) of the trapezoidal or other deformed quadrilateral frame (R "R _{1 to} R ₄ ") and the quadrilateral frame (R "R _{1 to} R ₄ "). The vicinity of the terminals (2 ₁ ) and (2 ₁ ) are arranged in two rows and mounted in the concave groove (4) to be sandwiched through the holding tool (3), and the wire terminal (2 ₁ ) protruding from the holding tool. ) Is fixed by the caulking member (6), and the displacement detecting material (7) is attached between the holding tool (3) and the caulking member (6) to form a quadrangular frame unit (A). Bolt displacement detector. The vicinity of the terminal of the wire (2) protruding outward from the holding tool (3) is folded back in an arc shape to form an annular (6n), and the terminal (2 ₁ ) is an annular caulking member (2 ₁ ) together with the wire in the vicinity of the terminal. The displacement detector for the lock bolt according to claim 1, which is fixed in 6).

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