JP2829821B2 - Pile foundation structure and rock fall protection net for rock fall protection net support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile foundation structure and a rock fall protection net for a rock fall protection net strut which is installed on a slope to receive rock fall and the like.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional rock fall protection net is usually formed by excavating a hole (not shown) for placing a foundation in a portion of a slope a where there is a risk of falling rock or the like. A concrete pile foundation (planting an anchor bolt) c is cast in the casting hole, and a strut support d is connected to the anchor bolt on each concrete pile foundation c, and each strut support d is provided. And the upper part of each column e is supported by a hanging rope f or the like, and the upper portion of each column e is reinforced with vertical and horizontal ropes g and h. The wire mesh i is constructed by anchoring the lower portion of the wire mesh i as shown in the drawing, and is covered with the wire mesh i in a pocket manner on the slope a to receive falling rocks and the like.

[0003]

In the conventional rock fall protection net, a concrete pile foundation is cast by excavating a column built-in portion of a slope having a poor scaffold as described above. It is a troublesome dangerous work that requires time and labor, and the date and time of curing, and the surroundings of the concrete pile foundation are excavated, resulting in unstable fragile ground. There are issues such as a decrease in the durability of the protective net.

[0004] The present invention has been developed to address the above-mentioned problems. The object of the present invention is to improve the workability of a pile foundation and the support performance and reliability of a column,
An object of the present invention is to provide a pile foundation structure of a pillar for rock fall protection nets and a rock fall protection net with improved upright performance, rock fall protection performance, and durability of the pillar.

[0005]

According to the present invention, there is provided a pipe anchor driven into a slope by the driving force of a driving machine, a resistance plate protruding to both sides along an upper portion of the pipe anchor, and
The pile foundation structure of the base plate fixed to the upper end of the pipe anchor and the upper edge of the resistance plate, and the pillar for the rock fall protection net provided with the column support with the bolt for fixing the column fixed to the base plate, To improve the efficiency, accuracy and sustainability of the driving work, and to improve the support performance of the support and the sustainability thereof.

Further, the pile foundation is driven into the slope with a horizontal space therebetween, and the pillars are hinged on each pile foundation, and the upper parts of the pillars are supported by hanging ropes or the like, and are built. In addition to connecting the upper part of the wire mesh reinforced with horizontal ropes, the lower part of the wire mesh is anchored on the slope to build a rock fall protection net, and the pile foundation is used to build up the pillars, rock fall protection performance, and reliability. It has enhanced durability as well as sex.

[0007]

With the pile foundation of the present invention, the pipe anchor is easily and precisely driven into the slope by the driving force of the driving machine, and is compacted without disturbing the ground at the driven portion. To increase the frictional force between the pipe anchor and resistance plate and the ground, generate a strong reaction force corresponding to the load from the support, and effectively prevent tilting,
With the compaction of the ground, the strong column support force is maintained stably for a long period of time, and excellent column support performance and reliability are obtained.

[0008] Accordingly, not only the accuracy of erection of the pillars but also the ability to stretch the wire mesh can be effectively improved, and the excellent rock fall protection performance is maintained for a long period of time.

[0009]

1 is an overall side view showing an embodiment of the present invention, FIG. 2 is an embodiment of the pile foundation, and FIG. 3 is an embodiment of driving of the pile foundation. In the figure, 1 is a pipe anchor, 2
Is a resistance plate protruding from both upper sides of the pipe anchor 1, 3 is a base plate fixed to the upper edges of the pipe anchor 1 and the resistance plate 2, and 4 is a column support with column mounting bolts 4a fixed on the base plate 1. The stand, 4a is a nut mounting bolt (hinge connection) with a nut, 5 is a column that is hingedly connected 4a on the column support 4, 4a is a head metal fixed to the upper part of the column 5, 6 is a metal connection 6a The head bracket 5 of the strut 5
hanging rope connected to a, 7a and 7b are vertical and horizontal ropes,
7c is a connecting metal, 8 is a wire mesh, 9 is a balance rope connected to the U-bolt 9a on the upper part of the column 1, 10 is a pile foundation of the present invention, and 11 is a cylindrical driving machine.

In the illustrated embodiment, a pipe anchor 1 driven into a slope a by the driving force of a driving machine 11 and a resistance plate 2 projecting on both sides along the upper part of the pipe anchor 1 are shown.
And a base plate 3 fixed to the upper end of the pipe anchor 1 and the upper edge of the resistance plate 3, and a column for a rock fall protection net provided with a column support 4 with column fixing bolts 4 a fixed on the base plate 3. It has a pile foundation structure.

Further, in the above-mentioned pile foundation structure of the pillar for rock fall protection net, the pile foundation 10 is driven into the slope a with a horizontal space therebetween, and the pillar 5 is hinge-connected 4a on each pile foundation 10 and the pillar is formed. The upper part of the wire mesh 5 is erected with the hanging ropes 6 and the like, and the upper part of the wire mesh 8 reinforced with the vertical and horizontal ropes 7a and 7b is connected to each of the pillars 5, and the lower part of the wire mesh 8 is anchored to the slope a to stretch. It is connected to the rock fall protection net.

More specifically, the pipe anchor 1 preferably has a pipe structure having an inner diameter capable of accommodating a tubular driving machine 11 described later, and has a tapered lower end portion at all ends thereof. 1a is formed to enhance the driving performance and increase the frictional resistance with the surrounding ground b. The resistance plate 2 is fixed along the upper both sides of the pipe anchor 1 by welding or the like and protrudes from both sides to increase the contact area with the surrounding ground b to increase the frictional resistance and to increase the reaction force of the ground b. Accordingly, the structure is such that the lateral movement of the upper part of the pile foundation 10 is prevented. The base plate 3 is fixed to an upper end portion of the pipe anchor 1 and an upper edge portion of the resistance plate 3 by welding or the like, and has an opening of the pipe anchor 1 in a central portion thereof so that the driving machine 11 can be inserted. The structure receives a reaction force from the ground b. The column support 4 is composed of a pair of brackets which are spaced from each other on the base plate 3 by welding or the like, and column mounting bolts 4a with nuts which are inserted into both brackets. The lower end 5 is hinged to the hinge connection 4a.

The column 5 is preferably made of H-shaped steel, and has a U-bolt 9a for connecting the balance rope 9 mounted on the upper portion thereof. The vertical rope 7a is connected by connecting metal fittings 6a, 7c and the like. Further, a plurality of vertical ropes 7a, horizontal ropes 7b, and the like are incorporated in the wire netting 8, and various connecting metal fittings are applied as necessary. The lower part thereof is disposed on the slope a by anchoring the lower ends of the plurality of vertical ropes 7a and both ends of the horizontal ropes 7b by appropriate means. As shown in FIG. 1, the structure is such that it is supported by being slightly inclined to the wire mesh 8 side with respect to the slope a.

As shown in FIG. 3, the driving machine 11 has a cylindrical main body having an outer diameter and a tapered shape which can be inserted into the pipe anchor 1, and a reciprocating piston built in the main body. Is driven in the forward or reverse direction by, for example, compressed air, and the reciprocating piston applies an impact to the front end or rear end of the main body to propell or reverse in the ground b. Mechanism driving machines are known).

The illustrated pile foundation 10 comprises a pipe anchor 1 as described above, a resistance plate 2, a base plate 3, and a column support 4 with column mounting bolts 4a. As shown in FIG. The driving machine 11 is accommodated therein, and the driving of the driving machine 11 is controlled by an appropriate remote control means (not shown) (the reciprocating piston in the main body is driven and controlled by compressed air supplied from a pipe 11a), and the propulsion force causes the pipe to be driven. The anchor 1 is driven into the ground b in a predetermined arrow direction X and driven. That is, as shown in FIG. 1, at the upper part of the slope a, the pipe anchor 1 is easily and smoothly driven into the ground b at a desired angle by the propulsive force of the driving machine 11 at a desired angle. a, the driving machine 11 is pulled out upward, and the pipe anchor 1 is pulled out.
The cover 4b (filled with mortar or the like, if necessary) is installed on the top.

The lower portion of the column 5 is pivotally attached to the column support 4 on the base plate 3 by column mounting bolts 4a and hinged 4a, and the column 5 is arranged to be tiltable in the direction of inclination of the slope a. At the same time, the tip of the hanging rope 6 connected to the head metal 5a of the support 5 by a connection metal 6a (with a turnbuckle) is anchored to the slope a by appropriate means, and the U mounted on the upper part of the support 5 as necessary. Bolt 9a
Anchoring the tip of the balance rope (pair of left and right as required) 9 connected to the slope a by appropriate means, and supporting the pillar 5 in a state in which it is slightly inclined downward as shown in the figure, As described above, a plurality of the pillars 5 are arranged on the slope a at horizontal intervals.

Further, a plurality of vertical ropes 7a and horizontal ropes 7b are assembled to the wire mesh 8, and reinforced by applying appropriate connecting metal fittings.
a, etc., and hung at an appropriate height on the slope a, and anchor the lower part of the wire mesh 8 to the lower end and both ends of the vertical rope 7a and the horizontal rope 7b on the slope a by appropriate means. a
As shown in the figure, the reinforced wire mesh 8 is held in the form of a pocket on the slope a as shown in the drawing, and the falling rock on the slope a can be effectively prevented by the elastic supporting force of the wire mesh 8 itself and the tilting of the column 5. It is built on a rock fall protection net that can be buffered and received.

As described above, the pile anchor 10 of the present invention is easily and accurately driven into the slope a with the pipe anchor 1 directed in the predetermined direction X by the driving force of the driving machine 11 as described above. The desired horizontal spacing is provided on the slope a and a plurality of driving are arranged, and the work is performed easily and efficiently in a short period of time in a safe operation, and the ground b of the driving portion is not particularly disturbed and is rather compacted, The pipe anchor 1
A strong frictional force is generated over a wide range between the resistance plate 2 and the surrounding ground b, and a strong reaction force in the direction of the arrow is generated by the frictional force corresponding to the load N from the column 5, and the base plate 3 also has an arrowhead. In response to the strong reaction force in the indicated direction, the column supporting force corresponding to the load N is sufficiently ensured, and the resistance plate 2 has a slope formed at the deflection angle α between the load N and the pipe anchor 1. Receiving the reaction force (reverse direction) in the direction indicated by the arrow corresponding to the horizontal component force in the direction a, the tilting of the pile foundation 10 is effectively reduced, and the supporting force of the strong ground b and the supporting force of the strut are long-term. It is sustained and stable over a long period of time, and excellent support performance and reliability of the strut can be obtained. Also, this resistance plate 2
It is preferable that the resistive plate 2 is buried in the ground at an inclination (120 to 70 °) with respect to the slope a as shown in FIG. It works effectively as a buoyant force as well as blocking.

Therefore, the accuracy of the installation of the pillars 5, the accuracy of the tension of the wire netting 8, and the rock fall protection performance are enhanced and maintained for a long time, and the durability of the rock fall protection net is remarkably enhanced.

In the illustrated example, the driving machine 11 is inserted into the pipe anchor 1 of the pile foundation 10 for propulsion, but the front part of the driving machine 11 is mounted on the upper part of the pipe anchor 1 if necessary. Then, it is also possible to give an impact to the pipe anchor 1 and drive the pipe anchor 1 into the ground b. Further, in the illustrated example, the wire mesh is stretched in a pocket manner on the slope, but a rock fall protection net stretched so as to cover almost the entire slope with the wire mesh can be used.

[0021]

As described above, the pile foundation of the present invention is easily and accurately driven into the slope by directing the pipe anchor in a predetermined direction by the driving force of the driving machine. Rather than being disturbed
The frictional force between the pipe anchor and the resistance plate and the ground significantly increases, and a strong reaction force corresponding to the load from the column is generated, effectively preventing tilting. The support strength of the support is stably maintained for a long time, and excellent support performance and reliability of the support can be obtained. Therefore, the pillars can be installed more accurately and the wire mesh can be stretched more accurately, and the superior rockfall protection performance can be maintained for a long time. In addition, the durability and the like of the rock fall protection net are remarkably improved.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention.

FIG. 2 is a front view (A), a side view (B), and a plan view (C) showing an embodiment of a pile foundation.

FIG. 3 is a side view mechanism diagram showing a driving state of a pile pipe anchor of a pile foundation on the ground.

FIG. 4 is a plan view showing a conventional example.

[Description of Signs] 1 Pipe anchor 2 Resistance plate 3 Base plate 4 Post support 4a Post mounting bolt 5 Post 6 Suspension rope 7a, 7b Vertical and horizontal rope 8 Wire net 9 Balance rope 10 Pile foundation 11 Driving machine a Slope

Claims (2)

(57) [Claims] 1. A pipe anchor driven into a slope by a driving force of a driving machine, a resistance plate protruding to both sides along an upper portion of the pipe anchor, an upper end of the pipe anchor and an upper edge of the resistance plate. 1. A pile foundation structure for a rock fall protection net support, comprising: a base plate fixed to a portion; and a support base with bolts for fixing the support fixed to the base plate. 2. The pile foundation structure of a pillar for rock fall protection net according to claim 1, wherein said pile foundation is driven into a slope with a horizontal space therebetween, and each pillar is hinge-connected on each pile foundation and each pillar is strung. The upper part of the building is supported by hanging ropes and built, and each pillar is connected to the upper part of the wire mesh reinforced with vertical and horizontal ropes, and the lower part of the wire mesh is anchored to the slope and stretched. Protective net.