JPH10280422A - Slope protection block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain cost reduction by making the weight of a slope protection block lightweight and eliminating trouble resulting from the division of the block. SOLUTION: A slope protection block 1 has an additional wall part 3 and a bearing plate rest 4 projected from the front of a vertical wall 2, and a plurality of detachable leg bodies 5 on the lower part of the front. Furthermore, the slope protection block 1 is a wall body made of precast concrete, and formed integrally with due consideration of weight suitable for the transport and erection works thereof. After an anchor is made tension, the vertical wall 2 falls in such a state as pressed to the natural ground and consequently the leg bodies 5 become free from the action of a load. Thus, the leg bodies 5 can be demounted for diversion to another slope protection block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-cast concrete fixing block for anchoring a slope for stabilizing the slope, and more particularly to a fixing block for forming a flat portion for planting on the slope in a step-like manner. About.

[0002]

2. Description of the Related Art In order to prevent a slope from collapsing and stabilize the slope, an anchor is cast on the ground to be fixed for the purpose of imparting a deterrent, and the head is fixed by a structure on the slope. Conventionally, anchoring methods often used a method frame, but the method was not very suitable for planting because the method used was to leave the slope inside. However, in recent years, there has been a demand for maintaining aesthetics and landscape even in slope stabilization work, and therefore, planting for covering a concrete structure constructed on the slope has become necessary.

[0003] As a legal stopper block for forming a flat portion for planting on a slope in the form of steps, for example, Japanese Patent Publication No. 7-42708.
Japanese Patent Application Laid-Open Publication No. H10-210, proposes a method stopping block made of precast concrete having an L-shaped cross section. This conventional locking block has a horizontal bottom plate and a vertical wall forming a support plate support on the front surface, and a hole for anchor insertion is formed in the center of the support plate support.

The retaining block is a structure in which a plurality of retaining blocks are connected to each other on the left and right to construct a retaining wall. However, since the tension of the anchor introduced for stabilizing the slope is considerably large, the vertical wall supporting the retaining wall is required. Sufficient thickness is required. In addition, a height for forming the slope in a stepwise manner is also required. Further, in the conventional legal stopper block, a horizontal bottom plate is fixed to a vertical wall in order to stand on the block mounting table constructed on the slope, and the weight of one legal stopper block is considerably heavy.
Therefore, if the whole is manufactured in one piece, there is a possibility that the weight becomes excessive and the transportation and installation become difficult. Therefore, the conventional method block employs a division system in which the vertical walls are appropriately divided according to the weight and these are combined on site.

[0005]

However, such a divided block requires the fixing and fastening of the connecting members and the filling of mortar at the time of installation, and the cost increases due to the increase in the number of members and the number of steps. There were drawbacks. Further, there is also a disadvantage that the range of planting is limited because the horizontal bottom plate for installation protrudes. Further, the magnitude of the tension of the anchor is determined based on the calculation of slope stability. However, it is complicated to manufacture a legal stopper block having a different thickness each time according to the tension, and the cost is high. It was connected to.

When the ground starts to move or the anchor tension increases after the completion of the anchor, it is necessary to separately install a reinforcing anchor. In the case of the conventional legal block, the vertical wall was reinforced and a new support plate cradle was attached, and an anchor hole could not be formed in these cradle plates so that a reinforcing anchor could not be installed.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides a legal stopper block capable of reducing the number of legal stopper blocks, realizing cost reduction by eliminating inconvenience due to division, and securing a planting portion as wide as possible. It is intended to be. Also, to provide a locking block which can cope with different anchor tension without changing the shape of the vertical wall and the supporting plate receiving base each time, and which can easily install a reinforcing anchor after the anchor is completed. Is also aimed at.

[0008]

In order to solve the above-mentioned problems, a legal stopper block according to the present invention includes a detachable leg at a lower portion of a front surface of a vertical wall. The retaining block is a wall made of precast concrete, and is manufactured integrally with the weight excluding the leg portion in consideration of transportation and installation. The center of gravity is located forward of the vertical wall because the wall portion and the support plate receiving stand protrude from the front surface of the vertical wall.

Therefore, when the legal stopper block is erected on the block mounting table, a forward falling moment acts, but the legs support the leg, so that the leg can be made independent. The block mounting table is composed of leveling concrete cast on a horizontal ground surface, and leg-supporting members made of divertable members connected thereto, such as square bars, etc., but the leveling concrete is made of a precast concrete wall. Cast only at the bottom. When concrete is poured between the ground and the block excavated close to the stop block and the anchor is tensioned, the vertical wall is pressed in the ground direction, so a load acts on the legs No longer. Therefore, the leg and the leg supporting portion can be removed and diverted to another legal stopper block. Moreover, since there is no concrete member on the ground surface in front of the vertical wall, planting can be performed over a wide area.

[0010] Further, the legal stop block according to claim 2 is characterized in that a supporting pressure dispersing plate that can be inserted according to an anchor force is provided between the supporting plate support and the steel supporting plate. I do. Even when the anchor tension is large, the supporting stress applied to the supporting plate receiving table can be reduced to a predetermined range by appropriately using the supporting pressure dispersing plate. Therefore, even if the anchor tension is different, a legal stopper block having a predetermined thickness and a weight in consideration of workability can be used without changing the shape of the vertical wall and the support plate support.

According to a third aspect of the present invention, there is provided a locking block, wherein a preliminary hole portion through which a reinforcing anchor can be inserted is formed in the vertical wall, the support plate receiving plate, the support distribution plate, and the steel support plate. It is assumed that. When it becomes necessary to place a reinforcing anchor after the completion of the anchor, it is possible to quickly cope with this without forming a new anchor hole in the wall or the like. This spare hole may be provided separately from the hole of the installation anchor, or may be a structure in which a long hole is formed and both holes are used.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a legal stopper block, FIG. 2 is a front view thereof, FIG. 3 is a plan view thereof, FIG. 4 is a side view thereof, and FIG. The legal stopper block 1 is provided with a plurality of detachable legs 5 on the front surface of a vertical wall 2 with an additional wall portion 3 and a supporting plate receiving stand 4 protruding from the front surface thereof. Also, on the side surface of the vertical wall 2, a convex portion 2 a that is fitted when a plurality of legal stopper blocks 1 are connected to form a retaining wall.
And a recess 2b. The projections 2a and the depressions 2b have a margin in their mutual size so that they can follow the shape of the slope on which the legal stopper block 1 is installed (see FIG. 3).

The leg 5 is composed of a frame 5a made by welding a steel material and a bolt 5b for fastening the frame 5a to the vertical wall 2. When the method-block 1 made of precast concrete is manufactured, it is inserted into a predetermined place. 5c is buried. As shown in FIG. 4, a slope 6 for stabilization is excavated to form a horizontal plane 7, leveling concrete 8a is cast at a portion where the vertical wall 2 is to be installed, and a leg supporting portion 8b made of a square bar or the like. Are connected to each other while adjusting the height of the block mounting table 8.

The block mounting table 8 is a member for installing the legal stopper block 1 at a predetermined height.
The height may be adjusted by laying gravel or sand instead of a. The legal stopper block 1 is lifted on the block mounting table 8 by a lifting device (not shown) and placed at a predetermined position. At this time, the leg 5 is attached at the site so that the legal stopper block 1 can stand on its own. The leg 5 determines the cross-sectional performance of each member so that the overturning moment of the locking block 1 can be supported.

The ground 9 on the rear side is excavated as close as possible so that the retaining block 1 does not fall backward due to external force or the like. 10 is cast. After that, the ground is drilled from the hole 11 formed in the support plate support 4, the anchor material 12 made of PC steel stranded wire or the like is inserted, the grout material is subsequently injected, and the compressive strength is checked. Support plate support 4
A steel support plate 13 is placed on the anchor member 12 to tension the anchor member 12, and the head is fixed to the legal stopper block 1. After that, backfill the soil 14 on the back of the block, secure the horizontal planting area and
Complete the steps.

After the anchor is tensioned, the vertical wall 2 is pressed toward the ground 9 so that no load acts on the leg 5. Therefore, at this time, the leg 5 and the leg supporting portion 8b can be removed and diverted to another legal stopper block, and a large planting portion can be secured in front of the vertical wall 2.
The hole 11 of the locking block 1 shown in FIGS.
Is a long hole in consideration of room for insertion of the reinforcing anchor.

As shown in FIG. 5, predetermined plants 15 are planted in the horizontal planting section in consideration of aesthetic appearance and landscape. As described above, the planting portion is flat, most of the horizontal surface 7 can be used as a planting portion, and a large volume of the rooted portion can be ensured. In addition, since the planting work is performed on a horizontal plane, a working machine can be introduced.
The method of stabilizing the slope while forming a flat part for planting on the slope in steps is called the green bench method, but according to this method, the retaining wall is constructed not only from the bottom but also from the top Because the slope is not cut off at once, there is less danger of landslides during construction, and the construction can be done on a horizontal part, so there is no need to work with a lifeline on the slope and safety can be secured. .

Incidentally, the tensile force of the anchor member 12 is transmitted to the concrete through the steel supporting plate 13, but the concrete immediately below the steel supporting plate 13 is locally loaded, so that the concrete is safe against the local load. Means are provided for arranging reinforcing bars and reducing local overpressure. The steel supporting plate 13 is determined to have a predetermined thickness and size according to the tensile force. However, the supporting base is not crushed by the supporting stress directly below the supporting plate, and the load dispersed on the supporting base is within an allowable range. The members must be examined so that they do not fit into the wall and do not cause shear failure of the wall. Incidentally, with respect to a slight change in the anchor driving angle, the angle can be adjusted by making the steel support plate 13 tapered.

When the anchor tension is large, the bearing stress may become excessive or the thickness of the wall portion may become insufficient in the pre-formed locking block. In such a case, by appropriately using the supporting pressure dispersing plate, the supporting stress acting on the supporting plate support can be reduced to a predetermined range, and the safety of the wall can be ensured. This embodiment will be described with reference to FIGS.
FIG. 6 is a side view of a legal stopper block according to another embodiment, and FIG. 7 is a front view of a bearing dispersion plate.

The legal stopper block 101 includes a support plate support 10.
The supporting pressure dispersing plate 16 is inserted between the supporting pressure plate 4 and the steel supporting plate 113. The supporting pressure dispersing plate 16 includes a steel cylinder 16 for inserting the reinforcing bar 16b and the anchor member 12 in a steel box 16a.
c is provided and filled with high-strength concrete 16d or high-strength lightweight material. The supporting pressure dispersing plate 16 disperses the supporting stress immediately below the steel supporting plate 113 within the thickness t to form the supporting plate receiving base 104, the additional wall 103, and the vertical wall 102.
Adjust not to exceed the concrete proof stress. By arranging a plurality of types of supporting pressure dispersing plates 16 having different thicknesses t according to the anchor force, it is possible to suppress the weight to a predetermined thickness and taking into consideration the workability without changing the shape of the legal stopper block. become.

Further, the locking block 101 has a hole for inserting an anchor to be installed at the time of block installation into the vertical wall 102, the support plate receiving base 104, the support distribution plate 16 and the steel support plate 113. 111 and a spare hole 121 for inserting a reinforcement anchor (not shown) to be cast after the retaining wall is completed. The preliminary hole portion 121 is prepared in advance so that the ground can start to move after the completion of the anchor, or the reinforcing anchor can be quickly driven when the anchor tension increases. The supporting pressure dispersing plate 16 shown in FIG. 7 has two steel cylinders 16c connected in series for reinforcing anchors.

[0022]

As described above, the legal stopper block according to the present invention has a detachable leg at the lower front portion of the vertical wall. Since the legs are separated, the vertical wall can be transported and installed even if it is manufactured as one piece, and the inconvenience that occurs when the vertical wall is divided can be eliminated. In addition, since the center of gravity of the locking block is located in front of the vertical wall, the vertical wall can be made to stand on its own even if the leg is a simple and lightweight member, and the weight of the locking block can be reduced as a whole. Further, after the anchor is tensioned, the leg and the member supporting the leg can be removed and used for another legal stop block, which can contribute to cost reduction. Also, by removing the legs and the like, planting can be performed over the entire ground surface in front of the vertical wall.

In addition, since the supporting block according to the second aspect of the present invention includes the supporting plate dispersing plate between the supporting plate support and the steel supporting plate, the supporting plate support can be used even when the anchor tension is large. Can be reduced within a predetermined range.
Further, since the preparatory hole is formed in the legal stopper block according to the third aspect, it is possible to quickly cope with a case where it becomes necessary to drive a reinforcing anchor after the anchor is completed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a legal stopper block.

FIG. 2 is a front view of a legal stopper block.

FIG. 3 is a plan view of a legal stopper block.

FIG. 4 is a side view of a legal stopper block.

FIG. 5 is an explanatory diagram of a usage example of a legal stopper block.

FIG. 6 is a side view of a legal stopper block according to another embodiment.

FIG. 7 is a front view of a supporting pressure dispersing plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leg stop block 2 Vertical wall 4 Support plate receiving stand 5 Leg 8 Block mounting base 11 Hole 12 Anchor material 13 Steel support plate

Claims (3)

[Claims] 1. A steel support plate is mounted on a support plate support provided on a front surface of a vertical wall to fix an anchor head, and a horizontal ground surface is formed on a back surface of a top of a retaining wall having a plurality of vertical walls. In the pre-cast concrete method stopper block which forms and stabilizes the slope and secures the horizontal planting part, the vertical wall is attached to the block mounting table to be built on the slope, after the anchor is tensed and attached. A legal stopping block comprising a detachable leg at a lower part of a front surface which can be removed. 2. The supporting block according to claim 1, wherein the retaining block includes a supporting-pressure dispersing plate that can be inserted between the supporting plate support and the steel supporting plate in accordance with an anchor force. The legal stop block described. 3. The legal stopping block according to claim 2,
A hole for inserting an anchor to be installed at the time of block installation into a vertical wall, a supporting plate receiving plate, a supporting member dispersing plate, and a steel supporting plate, and a spare that can be inserted after a retaining wall is completed. A legal stopper block characterized by forming a hole.