JP4568766B2 - Rock fall prevention fence - Google Patents

Description

  The present invention relates to a rockfall prevention fence.

  Falling rocks from high altitudes can cause serious injury and destruction of facilities. Conventionally, as shown in FIG. 1, as shown in FIG. 1, a rockfall prevention fence in which a cable B is stretched between the columns A and A in a multi-stage shape or a wire mesh C is stretched is used. The fence was generally a foundation using concrete D.

However, such a concrete foundation method is difficult to install when trying to install on a slope, regardless of whether the installation site is flat, a point that induces destruction of the earth and sand environment in the installation area, a point of falling rocks There was a problem in that it was necessary to include from the road to the road in the design strength.
That is, in the conventional method, a concrete foundation with a large volume must be constructed, so if you try to construct it on the middle of a steep slope, above the slope (back), you have to transport and cast a large amount of concrete, This is very difficult to work, and even if it is installed on the slope, the slope is damaged during construction. There was concern.

  In addition, the construction of concrete foundations on the slopes requires large-scale excavation of the natural ground and excavation of vegetation, which causes sediment runoff and natural destruction. Furthermore, since the concrete foundation installed in the middle of the slope cannot expect the earth pressure on the front, the foundation size increases. As a result, there has been a problem that causes sediment collapse (arc slip).

  For the above reasons, it has been difficult to install a rockfall protection fence in the vicinity of rockfalls where the rockfall energy is small or near it, for example, near the top of the slope, in the middle, etc. As a result, the mileage from the rockfall point is increased, Since it will lead to an increase in rockfall energy, the structure of the fence along the way will need to be strengthened, and the economy will be impaired.

  The present invention has been made in order to solve the above-mentioned problems, and the object of the present invention is that it can be relatively easily constructed on a slope or a steep slope near a rockfall occurrence place. It is intended to provide a rockfall prevention fence that does not cause damage to the ground, requires minimal logging of standing trees, and reduces the outflow of sediment after construction.

In order to achieve the above object, the present invention relates to a fence in which a rockfall prevention member is mounted on a plurality of columns, and a pile body made of a pipe material is embedded in a vertical hole drilled at a predetermined interval in the slope ground. perforation with embedded simultaneously, the pipe member than to insert the inner挿材consisting pipe member is based on the top end smaller cross-sectional area coupled to a pile body composed of the pipe material, the pipe member inner surface and the inner A pile made of pipe material is inserted between the outer surface of the insertion material and the space of the insertion material to join the insertion material, and a column with a base at the lower end is placed on the insertion material. The basic feature is that the base of the support is overlapped with the base of the insertion material.

The foundation of the rockfall prevention fence is made of a pile made of pipe material, and the pile is constructed by burying the pipe material vertically on the slope, etc. There is no concern about the subsequent loss of sediment. Therefore, it is possible to easily perform construction where the rockfall energy close to the place where rockfalls occur, such as the slopes and steep slopes, can be easily done, and coupled with the ability to minimize the felling of standing trees, the landscape is also good Can be a thing.
In addition, since the pile body is a pipe material, there is no directionality in strength, and the pillars are connected and built using the hollow structure of the pipe material. Since it has a base at the end and is connected to the base at the lower end of the column by superposition fixing, it is possible to easily establish a stable column and obtain excellent effects such as obtaining a reinforcing effect .

Moreover, because the pile body has a so-called multiple pipe structure or multiple structure because the cross-sectional area is smaller than the pipe material and the base is coupled to the top end, the strength becomes very high, A stable and strong rockfall prevention fence can be obtained. Moreover, there is an advantage that it can be easily performed in the field. When the pipe material is filled with hydraulic plastic material, the pipe material becomes a formwork, and it becomes a solid pile body with no gap inside, so the strength is improved and the pipe material and the insertion material are integrated. Can form a solid foundation.
The insertion material includes both a pipe material and a shaped steel material. According to this, the strength is extremely high, and a stable and strong rockfall prevention fence can be obtained.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIGS. 2 to 7 show a first embodiment of a rockfall prevention fence according to the present invention, where N is a slope on which the rockfall prevention fence is installed, and 1 is vertically embedded in the slope N at a predetermined interval. A pipe material as a pile and a steel pipe is preferable, but an FRP pipe, a concrete pipe, or the like can also be used.
Reference numeral 2 is a terminal column built in connection with the pipe material 1, and 2 ′ is an intermediate column built in connection with the pipe material 1, each composed of a shape steel material such as H-shaped steel or a pipe material Has been.

Embedding method of the pipe 1 is to pierce the ground for example gravel layer of slope N in drilling unit is performed by placing the pipe in the hole. The perforation and the pipe material may be installed by driving the pipe material after the perforation, but it is also convenient that the perforation and the embedding are performed at the same time. This can be done by, for example, using a bit machine, fitting the pipe material 1 to the rod of the machine, proceeding with the pipe embedding at the same time as drilling, and removing the machine when the drilling reaches a predetermined depth. It is a method of burying.
The connection form of the support pillars 2 and 2 'to the pipe material 1 will be described. In this embodiment, the support pillars 2 and 2' have a base at the bottom as shown in FIGS. That is, a bracket is welded to the lower end side surface of the support columns 2 and 2 ', and the bracket is joined to the base 2a by welding or the like.
On the other hand, an insertion material 2b having a smaller cross-sectional area than the pipe material 1 is prepared as a reinforcing member, and a base 2a 'is joined to the top end of the insertion material 2b by welding or the like. The insertion material 2b is a pipe material in this example, but may be a reinforcing bar, a deformed steel bar, another steel material processed product, or the like.

The insertion material 2b is inserted into the pipe material 1 that is already embedded in the ground, and in this state or before, a hydraulic plastic material 2c such as mortar or concrete is poured and filled into the pipe material. The outer surface of the material 2b and the inner surface of the pipe material are joined. When the insertion material 2b is a pipe material, the mortars 2 are also filled in the space of the insertion material 2b, and are integrated thereby to improve the strength.
The bases 2a and 2a 'are superposed and firmly fixed with bolts and nuts 2d using holes provided in them.

Reference numeral 3 denotes a multi-stage fence constituent member in which a terminal is connected between the terminal struts and an intermediate portion is supported by the intermediate strut 2 ', and may be a bar, an L-shaped steel, a strip, or the like. In this example, a cable is used. The end strut 2 is connected to a cable end fitting 20 having a rod rigidly connected thereto, and the intermediate strut 2 'is supported by a U-bolt or the like.
4 is an interval holding material arranged in the direction perpendicular to the cable extension between the support columns in order to keep the intervals between the fence members 3 constant and to cooperate with each other. A slit that matches the interval is provided, and the contact surface is covered with rubber or the like so as not to shear and break the fence member.

  5 is a wire mesh stretched around the fence member 3 to collect relatively small loose matter. The extension portion 5a is inverted at the lower part of the column so that it extends along the slope N on the mountain side and is fixed by the anchor 50. Yes.

  Reference numeral 6 denotes a support body for the terminal support column 2, which is made of a steel strip or the like, and is configured as an oblique material having an upper end portion coupled to a side surface of the terminal support column 2 with a bolt, and a lower end portion connected to the pipe material 1 embedded in the slope. ing. The connection is optional, but in this example, the connection method is the same as the connection method of the support column and the pipe material 1, that is, the lower part of the support body 3 is integrated with the base 3a, and the base 2a 'at the upper end of the insertion member 2b is integrated. And polymerization integrated. The middle of the support body 6 and the support are connected by an auxiliary support 6 '.

According to this embodiment, the pipe material 1 is embedded in the ground surface of the slope N, the insertion material 2b is inserted into the pipe material 1, the hydraulic plastic material 2c such as mortar is poured, and the base 2a at the top of the insertion material. Since the base and skeleton structure of the fence are completed by superimposing and connecting the base 2a at the lower end of the column to ', the construction is simple and the foundation is a double structure of the pipe material 1 and the insertion material 2b. Strength is improved.
Although not shown, a base is joined to the top end portion of the pipe material 1 by welding or the like, and this base, the base 2a 'at the top end of the insertion material, and the base 2a at the bottom end of the support are overlapped and connected. Also good. According to this, it is possible to form a foundation having higher stability and higher strength.

FIG. 8 shows another example of the above-described embodiment . A single base 2a is used as a common member, the lower ends of the columns 2 and 2 are joined to each other by welding or the like, and the top of the insertion material 2b is joined to the lower part. The ends are joined by welding.
According to this structure, as shown in FIG. 8B , the column is built by inserting the insertion member 2b into the pipe member 1, so that the bolting operation can be omitted.
In addition, although bolting is required, in order to improve strength and stability, a base may be joined to the top end portion of the pipe material 1 by welding or the like, and the base 2a as a common member may be fixed thereto by polymerization. .

FIG. 9 shows another example of the pipe material 1 according to the present invention. In this example, the pipe material 1 has a plurality of ribs 10 on the outer surface. The rib 10 is made of a plate or the like and is welded to the outer surface of the pipe material.
According to this structure, the strength of the pipe material is increased and the apparent diameter of the pipe material is increased, so that there is an advantage that the yield strength as a pile can be increased.
Of course, this pipe material structure is not limited to the connection method with the pillars shown in the first embodiment, but is also applied to the connection method with various pillars described later. The pipe material may have a rib on the inner surface.

As reinforcement form, in addition to performing the reinforced pipe 1 as shown in FIG. 9, or alternatively, as shown in FIG. 10, the vicinity i.e. fence extending perpendicularly of the pipe 1 with respect to support 2 (2 ') (transverse The pipe material 1 is embedded in the direction) as described above, and the base 1b with the connecting bracket is directly attached to the top end of the pipe material 1, or the base 1a of the pipe material top end or the base of the insertion material top end. The base 1b with the connecting bracket is fixed by being overlapped with 2a ', and connected to the base 2a obtained by connecting the lower ends of the support columns 2 (2') with the connecting member 9.
Incidentally, struts and connecting form of the pipe in this case may be any of such FIG.

A hydraulic plastic material (for example, reinforced concrete or averaged concrete) may be placed between the columns or between the pipe-type foundations so as to connect the pipe material heads.
However, for convenience, as shown in FIG. 4, the extended portion 5 a of the wire mesh 5 may be inverted at the lower portion of the support, along the slope N, and fixed with the anchor 50.
Alternatively, as shown in FIGS. 11 (a) and 11 (b), columnar members 7 such as thinned wood may be embedded vertically with an appropriate interval, and a columnar member 7 ′ may be laid horizontally behind them.
By adopting such a mode, it is possible to avoid pebbles from falling under the fence, accumulation of rainwater, outflow of earth and sand, and overturning of the foundation due to scouring, and because the exposure of the concrete surface can be suppressed, the scenery is improved. Can be increased. In addition, effective use of thinned wood is also possible.

1 2 to 1 4 show a second embodiment of the present invention.
This example shows a composite type in which a pipe material 1 and a shaped steel material 1 'are used in combination as a pile body.
In the embodiment of FIG. 16, an H-section steel comprising a pipe material 1 embedded in the ground, an insertion material 2 b and a support column 2 (2 ′), and the insertion material 2 b has a sectional dimension equal to or smaller than the inner diameter of the pipe material 1. And a base 2a 'is connected to the top end by welding or the like. The column 2 (2 ') has a lower end portion coupled to the base 2a via a bracket by welding or the like.
Said挿材2b is inserted in FIG. 1 3 and the pipe member 1 which is previously embedded as in Fig. 1 4, preferably bonded three parties by hydraulic plasticizer 2c filled in the pipe . And the base 2a 'of a support | pillar is mounted in the base 2a' of the top end of the insertion material 2b, and it connects with a volt | bolt nut etc. Also in this embodiment, the pile body has a multi-layer structure, so that the strength is increased.

Figure 1 5 is another example of the second embodiment, the base 2a as a common member, the upper bound of the lower end of the tower 2, 2 welding, etc., the inner挿材2b consisting of shape steel material at the bottom The top end is joined by welding.
According to this structure, since the struts are Tatekoma by inserting the inner挿材2b to pipe 1 as shown in FIG. 1 5 (b), it is possible to omit the bolt tightening operations.
In addition, although bolting is required, in order to improve strength and stability, a base may be joined to the top end portion of the pipe material 1 by welding or the like, and the base 2a of the common member may be fixed thereto by polymerization. .
Other configurations FIGS. 2-3, 9, 10, because it is similar to the method shown in FIG. 1 and the like 1, description is omitted.

  The present invention is not only suitable as a rock fall prevention fence on slopes and slopes, but is also effective as a rock fall prevention fence on flat ground that has been cut.

(a), (b), (c), (d) is the top view, front view, and left-right side view of the conventional rock fall prevention fence. It is a top view which shows 1st Example of the rock fall prevention fence by this invention. It is a front view of 1st Example. (a) (b) is a vertical side view of the first embodiment. FIG. 5 is a partially enlarged view of FIG. 4. It is sectional drawing which follows the XX line of FIG. It is a perspective view of the use member of the 1st example. (A) is a partial perspective view which shows another example of 1st Example, (b) is sectional drawing of a construction state. (a) is a partial perspective view which shows the other example of the pipe material in this invention, (b) is a front view which shows the usage example of the pipe material of (a). It is a side view which shows the example of reinforcement in this invention. (A) is a longitudinal front view which shows the other example of the filling structure between support | pillars, (b) is sectional drawing which follows the YY line of (a). It is a perspective view which shows the 2nd Example of this invention in an exploded state. It is sectional drawing which shows the installation state of 2nd Example. It is a cross-sectional view of FIG 3. (A) is a perspective view which shows the other aspect of 2nd Example, (b) is sectional drawing of an installation state.

DESCRIPTION OF SYMBOLS 1 Pipe material 2, 2 'Prop 2a, 2a', 1a Base 2b Insertion material 2c Hydraulic plastic material 3 Fence component

Claims (2)

In a fence in which a rockfall prevention member is mounted on a plurality of columns, a pile body made of a pipe material is embedded in a vertical hole drilled at a predetermined interval on the slope ground, or simultaneously with the drilling, and the pipe material the inner挿材consisting pipe member is based on the top end smaller cross-sectional area being bonded is inserted into the pile body composed of the pipe material than between the pipe inner surface and the inner挿材the exterior and interpolation Fill the space of the material with hydraulic plastic material, connect the pile made of pipe material and the insertion material, place the support column with the base at the lower end on the insertion material, and insert the support column base into the insertion material A rock fall prevention fence characterized by being superposed on the base of the base. In a fence in which a rockfall prevention member is mounted on a plurality of columns, a pile body made of a pipe material is embedded in a vertical hole drilled at a predetermined interval on the slope ground, or simultaneously with the drilling, and the pipe material the inner挿材is inserted into the pile body composed of the pipe member cross-sectional area consist of small form steel base is coupled to the top end than, between the pipe inner surface and the inner挿材the exterior and interpolation Fill the space of the material with hydraulic plastic material, connect the pile made of pipe material and the insertion material, place the support column with the base at the lower end on the insertion material, and insert the support column base into the insertion material A rock fall prevention fence characterized by being superposed on the base of the base.

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