TW201433675A - Slope stabilization method - Google Patents

Abstract

A slope stabilization method which involves installing a plurality of rock bolts on a natural slope at prescribed intervals and attaching support plates which are substantially triangular in a plan view to the head portions of the rock bolts to fasten the rock bolts and stabilize the slope, and which, with respect to the abovementioned slope stabilization, allows a rock bolt that should be installed at a specific location where a tree is located to be installed in the vicinity of that specific location and away from the tree, said slope stabilization method being characterized in that the installation location of that rock bolt is the location where that rock bolt would be installed when one edge of the substantially triangular part of the support plate to be mounted on the head portion of that rock bolt is disposed in proximity to the tree at an orientation directly facing the tree, and in that the support plate is attached to the head portion of the rock bolt such that the one edge of the substantially triangular part thereof is in an orientation directly facing the tree.

Description

Slope stabilization chemical law

The present invention relates to a slope stabilization chemical method in which a plurality of locking bolts are arranged at a specific interval on a natural slope, and a substantially triangular support plate is attached to the head of the above-mentioned locking bolt and fastened to stabilize the slope. In particular, in the case where there is a tree at a specific position where the locking bolt is to be provided, the locking bolt can be avoided by the slope stabilization chemical method in which the tree is placed as close as possible to a specific position.

As a slope stabilization chemical method that prevents slope collapse without the need to harvest trees that naturally grow on the slope, it is known to provide a plurality of locking bolts at specific intervals and to install a fastening support plate on the head thereof.

For example, in the slope stabilization chemical method of Patent Document 1, by installing a plurality of locking bolts on the slope, a support plate is attached to the head of each of the locking bolts, and the nut screwed with the threaded portion of the upper end of the locking bolt is fastened, and the lock is locked. The tension bolt imparts tension, and the tension of the lock bolt is transmitted to the slope via the support member, thereby obtaining a foundation supporting force (supporting force). This method is provided with locking bolts at intervals, so that it is not necessary to harvest wild trees on the slope to prevent the collapse of the slope.

As the shape of the support plate used in the slope stabilization chemical method, there are a substantially triangular support plate (Patent Documents 1, 2, 3), a square-shaped support plate (Patent Documents 1, 4), and a circular support plate ( Patent Document 5) and the like.

In Patent Document 1, a support plate having a quadrangular shape is disclosed as a support plate (Fig. 2 and Fig. 7 of Patent Document 1), and a support plate having a shape in which a bottom plate is cut into a substantially triangular corner portion is disclosed (Patent Document 1) Figure 5). The shape of the support plate of Patent Document 1 (the outline shape of the bottom plate) is substantially the same as the shape of the support plate 3 of Fig. 3(a) which is an embodiment of the present invention.

A substantially triangular support plate similar to that of Patent Document 1 is also used in the slope stabilization chemical method of Patent Document 2 (Fig. 1 and Fig. 3 of Patent Document 2). Further, the anchor piles are arranged at intervals of a triangle arrangement in which the anchor piles are located at the apex of the triangle. Patent Document 2 is also used as a slope stabilization chemical method for preventing rockfall, and is formed inside a mother triangle formed by a steel cable connecting between anchor piles, for example, 1 side 2 m, and formed by another steel cord, for example, a side 50 cm smaller. The mesh of the triangle of the child is prevented from being used by the net, and the mesh size of the above-mentioned one side 50 cm can be prevented from falling rock and just avoiding the tree to form a sub-triangle mesh.

As described above, in Patent Document 2, even if the tree for the natural slope is considered for the rockfall prevention net, the anchor pile and the support plate are not particularly considered, and the directions of the support plates are all in the same direction.

Patent Document 3 is also an invention of a hole cutting machine used in the above-described slope stabilization chemical method, and the description of the case of application to the slope stabilization chemical method discloses a substantially triangular support plate similar to the above-mentioned support plate. Further, as an embodiment applied to the slope stabilization chemical method, the lock bolts are arranged at intervals in a triangular arrangement at the apex of the triangle, or the substantially triangular support plates are all arranged in the same direction (Fig. 4 of Patent Document 3) .

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 11-93176

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2004-124689

[Patent Document 3] Japanese Patent No. 4215241

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2001-355238

[Patent Document 5] Japanese Patent Laid-Open Publication No. 2000-282474

In the case of the construction of the above-mentioned slope stabilization chemical law on a particular slope, the construction content is determined in order to prevent the collapse of the slope from taking into consideration the necessary matters (foundation conditions). The construction In most cases, as a specific position where the locking bolts are provided, in most cases, the locking bolts are arranged at a specific pitch in the vertical direction of the slope, for example, and are arranged at a specific pitch in the lateral direction of the slope, although they are not strictly but basic. . In addition, since there are usually undulations on the natural slope and the construction area is curved as a whole, it is not a simple plane and is controlled by a curved surface including undulations, and the above basic arrangement is applied.

However, in the natural slopes of trees, for example, there are cases where trees are placed at specific positions where the locking bolts are arranged in the above basic arrangement. Fig. 8 is a view for explaining an embodiment of the present invention, showing an example of the basic arrangement of the above-described locking bolts 1, for example, in the case where the trees 4 are wild in the basic arrangement position of the locking bolts 1 or in the vicinity thereof.

In this case, in the case where the substantially triangular support plate 3 is used, in the previous arrangement method, the support plate 3 is regarded as a one-dot chain line as shown in detail in FIG. 4(b) which will be described later. a circular support plate (ie, always considering the distance from the center of the triangle to the end of the apex direction), and configured to offset the position of the lock bolt 1 to the support plate 3 mounted to the lock bolt 1 does not The position where the trees 4 interfere. However, since the original locking bolt is preferably disposed at a specific position of the basic arrangement, it is desirable to be as close as possible to a specific position of the basic arrangement even if it has to be offset from a specific position.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a slope stabilizing chemical which can be placed as close as possible to a specific position when the tree is placed at a specific position where the locking bolt is to be provided. law.

The invention of claim 1 which solves the above problems is a slope stabilization chemical method characterized in that a plurality of locking bolts are arranged at a specific interval on a natural slope, and a substantially triangular support in plan view is mounted on the head of the locking bolt. When the plate is fastened and the slope is stabilized, when there is a tree at a specific position where the lock bolt is to be provided, the lock bolt may be disposed in the vicinity of the specific position while avoiding the tree; The locking bolt is disposed at a position of the support plate attached to the head One of the substantially triangular sides is disposed at a position of the locking bolt when the direction of the tree is adjacent to the tree, and one of the substantially triangular sides is set to be the head of the locking bolt attached to the head of the tree. unit.

According to a second aspect of the invention, in the slope stabilization chemical method of the first aspect, the side of the support plate which is formed in a substantially triangular shape is a concave curved side which is recessed on the center side of the triangle.

The invention is the slope stabilization chemical method according to claim 1 or 2, wherein the above-mentioned heads of the plurality of locking bolts are connected by steel wires.

[Technical Solution 4] The slope stabilization chemical method according to any one of the first to third aspects, wherein the slope stabilization chemical method applied to the plurality of locking bolts is a triangle having a apex of a triangle which is inclined at an inclination of one side Arranging at intervals to the natural slope, and mounting the support plate on each of the above-mentioned locking bolts, and fastening it to give a supporting force to the foundation, and then at least completing the connection between the locking bolts in the up and down direction of the slope The method is to connect the above-mentioned locking bolts with steel cables.

According to the present invention, since the tree is disposed at a specific position where the locking bolt is to be provided, the direction of the support plate attached to the head of the locking bolt is set to be one of its substantially triangular sides facing the direction of the tree. Thereby, the support plate is disposed adjacent to the tree in the range in which the side of the support plate does not interfere with the tree, so that the lock bolt can be disposed as close to the tree as possible. Thus, since the locking bolts desirably disposed at specific positions of the basic arrangement can be placed as close as possible to the specific position of the basic arrangement, good construction is achieved in terms of slope stabilization.

When the shape of the support plate is circular, the position of the circumference of the support plate does not change. When the shape of the support plate is a quadrangular shape, the side is opposed to the tree, and the diagonal direction and the tree are made. Although the opposite direction can be compared with the distance between the center of the support plate and the tree, in the case of a triangle, the accessible ratio can be further approached. Therefore, in the present invention, the shape of the support plate is substantially triangular, which is more suitable for one side. The original support function of the supporting force of the foundation is to make the locking bolt as close as possible to the purpose of the invention of the tree.

According to the second aspect of the invention, since the substantially triangular side constituting the support plate is a concave curved side which is recessed toward the center side of the triangle, the distance from the central position of the side to the locking bolt is compared with the case where the side is a straight side. Short, so the locking bolts can be closer to the side of the tree.

As shown in the third aspect of the invention, in the case of the slope stabilization chemical method in which the head of the locking bolt is connected by the steel cable, since the direction of the cable is close to the basic arrangement, the function of the locking bolt is pulled by the steel cable, and the load is dispersed. The role or the like is assumed to be close to the basic arrangement. That is, the function of the configured steel cord can be minimized.

As shown in the fourth aspect of the invention, when a plurality of locking bolts are arranged in a triangle arranged at the apex of the triangle which is inclined in the direction of the slope, when the foundation is moved, the locking bolts are inclined above and below the connecting slope. The cable has a particularly large tension, so the cable has a greater effect on the locking bolt. When the position of the locking bolt is offset from the specific position of the basic arrangement, the cable between the locking bolts which are connected above and below the inclination direction of the slope is also inclined with respect to the inclination direction of the slope. If the inclination is too large, the steel cable also pulls the locking bolt. The possibility that the role cannot be fully utilized.

Therefore, according to the present invention, which can reduce the offset between the specific position of the basic arrangement of the locking bolts and the actual set position, the inclination angle of the cable between the locking bolts above and below the inclination direction of the connecting slope to the inclination direction of the slope can be minimized. , but try not to damage the role of the steel cable to pull the locking bolt.

1‧‧‧Anchor pile (locking bolt)

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H‧‧‧ (interference with trees) locking bolts

2‧‧‧Steel cable

3‧‧‧Support plate

3a‧‧‧Edge of the generally triangular support plate (=edge of the substantially triangular bottom plate 5)

4 (4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H) ‧ ‧ trees

5‧‧‧floor

5a‧‧‧Center hole

6‧‧‧Cylinder

7‧‧‧ reinforcing ribs

7a‧‧‧Steel cable insertion hole

8‧‧‧Washers

9‧‧‧ nuts

10‧‧‧ Foundation

X‧‧‧ direction

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a top plan view of a slope of a slope stabilization chemical process in accordance with one embodiment of the present invention.

Figure 2 is a longitudinal cross-sectional view of a portion of the slope of Figure 1.

Fig. 3(a) is an enlarged view of a portion of the locking bolt of the first portion of Fig. 1, and (b) is a cross-sectional view.

Figure 4 is a view showing the manner in which the position of the locking bolt is set at a position where the support plate attached to the head does not interfere with the tree, (a) shows the situation of the present invention, and (b) shows the situation of the prior method. .

5(a) to 5(e) are diagrams showing the positional relationship between the tree, the locking bolt and the support plate in the portion where the locking bolt is arranged in the tree avoiding the tree, and the different modes are respectively displayed.

Fig. 6(a) to (c) are diagrams respectively showing the portions of the locking bolts of Fig. 1 which are arranged to avoid the trees and the six locking bolts around them, and are respectively different parts.

Fig. 7 is a view showing another example of a mode in which the lock bolt and the support plate are avoided from trees.

Figure 8 is a view for explaining an embodiment of the present invention, showing an example of a basic arrangement of the locking bolts in the construction of the construction slope stabilization chemical method, and as an embodiment, the trees are wildly located at or near the basic arrangement position of the anchor piles. The situation.

Hereinafter, the form of the slope stabilization chemical method for carrying out the present invention will be described with reference to the drawings.

[Example 1]

1 is a plan view showing a slope of a slope stabilization chemical method according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a portion of the slope of FIG. 1, and FIG. 3(a) is a locking bolt of the portion of FIG. The part is enlarged and (b) is a sectional view.

The present invention is directed to a natural slope, and is a slope stabilization chemical method that can stabilize a slope without cutting trees. In the slope stabilization chemical engineering method of the present embodiment, as shown in FIG. 1 and FIG. 2, a plurality of locking bolts 1 are disposed on a natural slope with a triangular shape located at an apex of a triangle which is inclined at an inclined direction X on one side, and each lock is applied to each lock. The support plate 3 is attached to the head of the tightening bolt 1 and fastened to give a supporting force to the foundation, and then a method of connecting the three locking bolts 1 arranged in a triangular shape by one wire 2 is attached. A locking bolt (hereinafter, hereinafter simply referred to as an anchor pile) 1 is inserted into a particular depth of the solid foundation 10 below the surface of the surface where the sliding occurs. In addition, the above-mentioned slope inclination direction X does not mean only the upper side of the slope. Or the lower side, also refers to the direction of the slope (gradient) of the slope.

The support plate 3 of the illustrated example is made of steel, and as shown in FIG. 3, the cylinder 6 is vertically fixed to the central portion of the substantially triangular-shaped bottom plate 5 having the center hole 5a through which the anchor pile 1 passes, and is on the bottom plate. The structure of the three-way fixed reinforcing rib 7 is fixed. The reinforcing rib 7 is provided with a cable insertion hole 7a through which the wire 2 passes. The cylinder 6 of the support plate 3 is placed over the head of the anchor pile 1, and the gasket 8 is arranged to screw and fasten the nut 9 to the threaded portion of the head of the anchor pile 1 to impart a supporting force to the foundation.

In the case of the construction of the slope stabilization chemical method, the construction contents are determined in consideration of the necessary items (foundation conditions) in order to prevent the collapse of the slope. However, in the present embodiment, the anchor pile 1 is provided at the time of construction. In a specific position, as shown in Fig. 8, each of the anchor piles 1 is arranged at a specific interval in the oblique direction of the slope, and is arranged substantially at a specific interval in the lateral direction of the slope. In addition, since there are undulations and the like on the actual natural slope, it is not only a plane but a curved surface including undulations and the like, and the above basic arrangement is applied, but here, it is schematically displayed in a simple plane without undulations or the like.

However, on the natural slope of the tree, there is a case where the tree 4 is placed at a specific position of the anchor pile 1 to be constructed in the above basic arrangement. For example, in the above-described FIG. 8, as an embodiment, 8 trees 4 which are wild at the basic arrangement position of the anchor pile or in the vicinity thereof are denoted by reference numerals 4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H.

Since the anchor pile is preferably disposed at a specific position of the basic arrangement, even if the anchor pile 1 in which the tree is nearby is also shifted from a specific position, it is also disposed in a specific position as close as possible to the basic arrangement in the present invention. . Further, in the present embodiment, the specific position of the basic arrangement corresponds to "the specific position at which the locking screw should be provided".

In the embodiment shown in FIG. 1, the trees 4A, 4B, which are located at or near the basic arrangement of the anchor piles of FIG. 8 above, are denoted by 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, respectively. Anchor pile 1 provided with 4C, 4D, 4E, 4F, 4G, 4H.

When the tree 4 is nearby, the anchor piles 1A to 1H are offset from the trees 4, and are installed on The direction of the support plate 3 of the head of the anchor pile 1 is such that the one side 3a of the substantially triangular shape is in the direction of the tree 4, and the side 3a of the support plate 3 does not interfere with the tree 4 Near the tree 4 people. For example, Fig. 4(a) is an enlarged view of a portion of the anchor pile 1D of Fig. 1, but is a case where the tree 4 is present at a position (indicated by an asterisk) of the basic arrangement of the anchor pile 1 (1D). As an idea, one side 3a of the support plate 3 is opposed to the tree 4 as indicated by a two-dot chain line, and in this state, the anchor pile 1 and the support plate 3 are moved to the side of the tree 4, and the support plate 3 is not associated with the tree 4. The adjacent position indicated by the solid line of the interference is set as the set position of the anchor pile 1. In the case of on-site construction, the following operations can be performed: one side of the support plate is placed as close to the tree as possible to the tree, and a mark is attached to the center position as an anchor pile installation position, and then the support plate is moved to the temporary installation place. The anchor pile 1 is placed at the position marked above. Further, as described above, the direction in which one side 3a of the support plate 3 opposes the tree 4 corresponds to "the direction in which one of the substantially triangular sides is facing the tree". In this state, the distance between the central portion of one side 3a of the support plate 3 and the tree 4 is smaller than the distance between the substantially triangular corner portion and the tree 4. Further, in this state, when the center of the anchor pile 1 and the center of the tree 4 are connected by a virtual straight line, the virtual straight line passes through the vicinity of the center portion of the side 3a. Further, in the present embodiment, since the substantially triangular side 3a constituting the support plate 3 is a concave curved side which is recessed toward the center side of the triangle, the center position from the side 3a is compared with the case where the side 3a is a straight side. The distance of the locking bolt 1 is short, so that the locking bolt 1 can be brought closer to the side of the tree 4. However, the shape of the support plate 3 is not limited to those shown in the drawings, and the side 3a may be linear.

The previous setting method is as shown in Fig. 4(b), and the direction of the support plate 3 is not particularly considered. That is, as an idea, the support plate 3, which is represented by a two-dot chain line, is regarded as a virtual circle represented by a 1-dot chain line regardless of its direction (that is, the distance from the center of the triangle to the end of the vertex is uniformly considered). And the tree 4 is opposed, and in this state, the anchor pile 1 and the support plate 3 are moved to the side of the tree 4, and the virtual circular (virtual support plate 3) does not interfere with the tree 4 and is adjacent to the solid line. Set to the setting position of the anchor pile 1. This direction does not correspond to "the direction of one of the sides of the triangle is positive for the tree."

As is clear from Fig. 4 (a) and (b), the position of the anchor pile (center position of the support plate) and the distance m of the tree in the case of the present invention (a) is sufficiently shorter than the position of the anchor pile in the case of the prior method. The distance from the tree m'. That is, the anchor pile 1 can be brought close to the tree as much as possible.

The slope stabilization chemical system shown in FIG. 1 is not only provided with a plurality of anchor piles 1 in a triangular configuration, but also a support plate 3 is attached to the head of each anchor pile 1 and fastened, and then the cable piles 2 are connected to each anchor pile 1 The method of construction, therefore, not only avoids interference between the anchor pile 1 and the support plate 3 and the trees 4, but also does not interfere with the trees 4.

5(a) to 5(e) are diagrams for explaining the positional relationship between the tree 4 on the portion where the anchor pile 1 is disposed, the anchor pile 1 and the support plate 3, and the different modes are respectively shown.

Fig. 5(a) is an illustration of the position of the anchor pile 1D of Fig. 1 as illustrated in Fig. 4(a). In this example, the tree 4D overlaps with the basic arrangement position of the anchor pile (the position of the asterisk), shifting the anchor pile 1D to the right from its basic arrangement position, and rotating the support plate 3 to the right by about θ=30° (clockwise Direction rotation).

Fig. 5(b) shows an example of the position of the anchor pile 1E of Fig. 1. In this example, the tree 4E is located at a position slightly adjacent to the upper right oblique side of the basic arrangement position of the anchor pile, and the anchor pile 1E is slightly displaced from the basic arrangement position to the left side, and the support plate 3 is rotated leftward by about 33. ° (rotate counterclockwise).

Fig. 5(c) shows an example of the position of the anchor pile 1B of Fig. 1. In this example, the tree 4B is located at a position obliquely to the left oblique lower side of the basic arrangement position of the anchor pile, and the anchor pile 1B is offset from the basic arrangement position to the upper right side, and the support plate 3 is rotated left by about 20°. .

Fig. 5(d) shows an example of the position of the anchor pile 1C of Fig. 1. In this example, the tree 4 is located at the slightly lower right side of the basic arrangement position of the anchor pile, and the anchor pile 1C is shifted from the basic arrangement position to the upper left oblique side, and the support plate is rotated right by about 16°.

Fig. 5(e) shows an example of the position of the anchor pile 1H of Fig. 1. In this example, the tree 4H is located at the right oblique upper side of the basic arrangement position of the anchor pile, and the position of the anchor pile 1H is still the basic arrangement position, and the support plate 3 is rotated right by about 35°.

Since the slope stabilization chemical method shown in FIG. 1 as described above connects the head of the anchor pile 1 with the steel cable 2, not only the anchor pile 1 and the support plate 3 are prevented from interfering with the trees, but the steel cable 2 does not interfere with the trees 4. .

Fig. 6(a) shows the case of the anchor pile 1D of Fig. 1, and any position of the six anchor piles 1 around it is not offset, so that the interference between the cable 2 and the tree 4D can be avoided. Similarly, the anchor pile 1H can avoid this interference without offsetting the position of the surrounding six anchor piles 1.

However, in FIG. 1, in the anchor piles 1A, 1B, 1C, 1E, 1F, 1G, in order not to interfere with the rope 2, the basic arrangement position of one of the six anchor piles around the anchor pile is Offset.

For example, in the case of the anchor pile 1E of Fig. 1 in Fig. 6(b), in order to avoid interference of the cable 2 with the tree 4E, the position of one of the six anchor piles 1' is offset.

For example, Fig. 6(c) shows the position of the anchor pile 1G of Fig. 1 in order to avoid interference between the cable 2 and the tree 4G, and to shift the position of the two anchor piles 1' of the six surrounding.

[Embodiment 2]

In the above embodiment, the anchor pile 1 is an embodiment in which the steel cable 2 is connected to the six anchor piles 1 around it, except for the edge of the slope stabilization construction area of the slope, but according to the field of the tree The ecological sample may also omit one of the links of the cable 2.

In the wilderness of the tree 4, for example, as shown in Fig. 7, for all the four anchor piles 1 surrounding the three trees 4, it is difficult to interfere with the trees 4 with the steel cables 2 and the adjacent 6-direction anchor piles. 1 link. In this case, as shown in the figure, the connection of the cable 2 between the anchor piles 1 adjacent to each other may be omitted. In this case, it is only necessary to implement a certain reinforcing structure as needed.

Although the slope stabilization chemical method of each of the above embodiments is a method in which the steel cable 2 is coupled between the heads of the anchor piles 1, the present invention can also be applied to a method in which the steel cables 2 are not connected between the heads of the anchor piles 1. In this case, since only the positional relationship between the position of the basic arrangement of the anchor piles 1 and the trees is considered, the explanation of the specific examples is omitted in order to prevent the anchor piles and the support plates from interfering with the trees, but the change is simple.

In addition, although the present invention is directed to a slope stabilization chemical law which prevents slope collapse as far as possible without cutting the wild trees on the slope, it is not the case where the trees are to be excluded.

1‧‧‧Anchor pile (locking bolt)

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H‧‧‧ (interference with trees) locking bolts

2‧‧‧Steel cable

3‧‧‧Support plate

4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H‧‧‧ Trees

5‧‧‧floor

6‧‧‧Cylinder

X‧‧‧ direction

Claims (4)

A slope stabilization chemical method characterized in that a plurality of locking bolts are arranged at a specific interval on a natural slope, and a substantially triangular support plate in plan view is mounted on the head of the locking bolt and fastened to seek a slope When it is stable, when there is a tree at a specific position where the above-mentioned locking bolt is to be disposed, the locking bolt may be disposed in the vicinity of the specific position while avoiding the tree; and the setting position of the locking bolt is One of the substantially triangular sides of the support plate attached to the head is disposed adjacent to the locking bolt when the direction of the tree is adjacent to the tree, and the one side of the substantially triangular shape is set to the direction of the tree and the above A support plate is attached to the head of the locking bolt. The slope stabilization chemical method according to claim 1, wherein in the support plate, the side of the substantially triangular shape is a concave curved side which is recessed toward the center side of the triangle. The slope stabilization chemical method of claim 1 or 2, wherein said heads of said plurality of locking bolts are joined by steel wires. The slope stabilization chemical method according to any one of claims 1 to 3, wherein the plurality of locking bolts are disposed at a natural interval on a triangular arrangement of the plurality of locking bolts at a vertex of a triangle which is inclined at an inclination of one side, and Mounting the support plate on each of the above-mentioned locking bolts, and fastening the same to give a supporting force to the foundation, and then connecting the locking by a steel wire in a manner of at least completing the connection between the upper and lower locking bolts in the inclined direction of the slope. The slope between the bolts stabilizes the chemical law.