JP2004156311A - Natural-stone fixed stair unit and stair construction method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a natural-stone fixed stair unit, by which the workability of stair works on a face of a slope for a revetment is improved while durability after the execution of works is enhanced and which is preferable even from an environmental preservation and a landscape side, and a stair construction method using the unit. <P>SOLUTION: The stair unit and the stair construction method in which a frame 1 made of steel is formed by welding crossing sections by combining frame members 2 and supporting members 3 having specified widths in a plane shape, the natural-stone fixed stair unit 9 is manufactured by supporting and fixing a large number of natural stones 4 and 4 worked in an approximately triangular sectional triangular prismatic body on the frame 1 made of steel and the stair unit 9 is used as a mat installed on the face of the slope for the revetment are provided as basic means. The natural-stone fixed stair unit is manufactured by constituting the frame so that the plan view of the frame members is formed in a partially cured surface shape and supporting and fixing the natural stones worked in an approximately triangular sectional curved columnar shape by combining straight lines and curves on the frame made of steel. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a natural stone-fixed staircase unit and a staircase construction method using such a staircase unit to which natural stone is fixed, and that stairs such as revetment slopes are naturally performed using a stair unit.
[0002]
[Prior art]
A typical method of performing conventional revetment, revetment, and consolidation works is to use a stone masonry method in which natural stones are manually piled up one by one and stuffed stones are placed between the stones. ing. However, this method requires a long construction time and has a problem that natural stone becomes unstable when the seawall is more than 2 meters high.
[0003]
In response to the above, when constructing revetment, revetment, and embankment work, a method of surrounding both banks with a concrete dike or solidifying concrete to the riverbed is also being implemented. In addition, in order to make use of the natural scenery function, instead of the above-mentioned empty stone masonry method, there is also carried out a boulder masonry method in which concrete is discarded on the ground and natural stones are fixedly laid.
[0004]
Furthermore, as a construction method for stairs for revetment, a natural stone such as granite processed into a staircase is perforated, and a specially shaped projection anchor fitting attached to a predetermined position of a wire mesh is inserted into the perforated portion of the natural stone. There is also a construction method in which a stair unit combined with a special coagulant is prepared in advance at a factory, and the stair unit is laid adjacent to a seawall slope.
[0005]
Conventionally, a plurality of natural stone holding units are laid in a state of being adjacent to each other via a frame using an angle material having a substantially L-shaped cross section, and a plate-like holding body is provided on one side bent portion of the angle material. While the peripheral portion is supported, the other-side bent portion of the angle material is erected on the natural stone side from the peripheral portion of the holding member, and the other-side bent portion of the facing frame body between the adjacent natural stone holding units. There is provided a natural stone holding unit assembly and a natural stone holding unit which are connected on a seawall slope via a refuge (see Patent Document 1).
[0006]
[Patent Document 1]
Japanese Patent No. 3048518
[Problems to be solved by the invention]
As mentioned above, revetment / protection / consolidation works using the concrete dike surrounding both banks and hardening with concrete to the riverbed or the laying stone masonry method where concrete is discarded on the ground and natural stone is fixed and laid is used. In each case, the construction is special and the craftsman lays it over time, which poses problems in work efficiency and cost. In addition, the above-mentioned method has a problem that the natural ecosystem of the river is destroyed and the self-purifying action is poor, and there is a problem that it is not preferable from the viewpoint of environmental conservation.
[0008]
Furthermore, a method of laying a stair unit adjacent to the seawall slope with a stair unit inserted into a perforated part of natural stone processed into a staircase with a specially shaped projection anchor fitting attached to a predetermined position of the wire mesh, at the time of suspension construction Since the wire mesh is twisted or distorted, the stability of the stair unit itself is poor, and it is necessary to perform repair work after the construction, so that the construction requires a long period of time and the durability of the wire mesh is short.
[0009]
Further, according to Patent Literature 1 using an angle material having a substantially L-shaped cross section, the ability to follow the ground is limited due to the presence of the angle material, and lacks flexibility. In addition, since natural stones are connected to each other via the angle material, adjacent stair units need to be in close contact with each other, and there is a disadvantage that the construction and connection work for the steps are complicated. Further, since natural stones are arranged on a mesh or mesh forming a plurality of eyes, the position where natural stones are bonded is not specified, and there is a problem that the whole is lacking in unity and aesthetic appearance. .
[0010]
Therefore, the present invention solves the above-mentioned problems, improves the workability of stair construction on the seawall slope, and has high durability after the construction. It is an object of the present invention to provide a preferred natural stone fixed stair unit and a stair method using the unit.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention forms a steel frame by combining a frame member having a predetermined width and a support member in a plane and welding an intersection, and forming a substantially triangular cross section on the steel frame. A natural stone characterized by using a natural stone-fixed staircase unit by supporting and fixing a large number of natural stones processed into a triangular prism, and using the natural stone-fixed staircase unit as a mat to be installed on a revetment slope. A fixed stair unit and a stair construction method using the unit are provided as basic means.
[0012]
Specifically, a frame member having a predetermined width is arranged in a rectangular or square shape, and a support member is fixed vertically and horizontally inside the frame member to form a steel frame. Further, a frame member having a predetermined width is configured to be partially curved in a plan view, and a support member is fixed vertically and horizontally inside the frame member and a cross section is welded to form a steel frame. Then, a natural stone-fixed stair unit is produced by supporting and fixing a large number of natural stones processed into a columnar body having a substantially triangular cross section by combining a straight line and a curve on the steel frame. Used as a mat to be installed on the revetment slope.
[0013]
A hole for inserting a bolt is formed at the intersection of the support member, and the frame member and the support member have appropriate flexibility so as to follow ups and downs of the ground.
[0014]
At the time of installation of the above natural stone fixed stair unit, the stair unit is hung by a wire hanging down from the boom tip using a suspension ring fixed in the cutout of natural stone and brought into close contact with the seawall slope to be constructed. And fix the adjacent suspension ring using the connecting bracket. Further, the present invention provides a stair construction method in which a natural stone-fixed stair unit is formed by maintaining the flexibility of the steel frame, and the steel frame follows the undulation of the ground by the weight of the natural stone.
[0015]
According to such a natural stone-fixed stair unit and a stair method using the unit, the slope is shaped in accordance with a design slope for revetment at the time of use, then a suction prevention agent is applied, and then allocation marking is performed, and a truck is used. Bank protection work using a stair unit by suspending the stair unit with wires hanging down from the boom end of various cranes, such as cranes, and closely attaching the stair unit on the slope, and connecting and fixing adjacent suspension rings using brackets Is completed. Since the natural stone is supported and fixed as a surface at the intersection of the support members, it is excellent in unity and aesthetic appearance after construction, and has an effect of improving the landscape.
[0016]
In order to cope with slopes with many irregularities, a natural stone-fixed staircase unit with flexibility kept on a steel frame is constructed, and this natural stone-fixed staircase unit is closely laid on the revetment slope, The revetment work following the undulation is completed by the weight of the natural stone.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of a natural stone staircase unit and a staircase construction method using the unit according to the present invention will be described below with reference to the drawings. The present invention provides a steel frame formed by combining a frame member having a predetermined width and a support member in a plane and welding an intersection, and processing the steel frame into a triangular prism having a substantially triangular cross section. A natural stone-fixed staircase unit is manufactured by supporting and fixing natural stones, and the natural stone-fixed staircase unit is used as a mat to be installed on the revetment slopes, and a staircase construction method using the unit. Means.
[0018]
FIG. 1 is a plan view showing an example of the shape of a frame 1 used in a first embodiment of the present invention. The frame 1 has four frame members 2, 2 arranged on the outer peripheral portion, and the frame members 2, 2. And supporting members 3 and 3 which are arranged vertically and horizontally inside and are welded at the intersections. A plate-like steel material having a predetermined width is used for the frame members 2 and 2 and the support members 3 and 3. Is configured. A hole 10 for inserting a bolt is formed at the intersection of the support members 3.
[0019]
FIG. 2 shows that natural stones 4 and 4 such as granite processed on the upper surface of the frame 1 are juxtaposed in a stepwise manner, and then the natural stones 4 and 4 are fixed to the frame 1 by bolts 8 using the holes 10 of the frame 1. FIG. 3 is a side view showing a state in which the stair unit 9 is installed on the seawall slope, and FIG. 3 is a plan view of the same. The natural stones 4, 4 are processed into triangular prisms having a substantially triangular cross section. As shown in FIG. 3, cutouts 4a, 4a are formed at the ends of the specific natural stones 4, 4, and the cutouts 4a, 4a are formed. The suspension rings 5 and 5 shown in FIG. 2 are fixed in 4a. The natural stones 4 may be fixed using a resin mortar bond instead of the bolt.
[0020]
As described above, the place where the natural stones 4, 4 are fixed at the intersections of the support members 3, 3 is specified, and the natural stones 4, 4 are supported and fixed on the support members 3, 3 as surfaces. Is one of the features of the present invention.
[0021]
FIG. 4 shows a method of fixing the natural stones 4, 4 on the frame 1. In order to prevent the natural stones 4, 4 from moving, adjacent suspension rings 5, 5 are connected by a shackle 6. . FIG. 5 shows a connecting point by the shackle 6 when a large number of natural stones 4 and 4 are installed.
[0022]
By forming each of the support members 3 and 3 in the form of a flexible plate, the flexibility is improved, and the followability with the embankment slope to be installed is improved. In particular, each of the support members 3, 3 is formed to have a thickness having an appropriate flexibility, and the shape can follow the weight of the natural stone 4, 4 according to the undulation of the installed ground. Furthermore, water permeability is maintained by forming an appropriate gap portion between the natural stones 4 and 4. In the first embodiment, the frame members 2, 2 and the natural stones 4, 4 are rectangular in plan view, but may be square in plan view.
[0023]
The surface of the steel frame formed by the frame members 2, 2 and the support members 3, 3 is galvanized, and the galvanized film is completely consumed for a period of 50 to 60 years and has a long service life. There is a feature. Further, wood can be used in place of the steel frame. The frame 1 can be used as it is without being galvanized, or can be constructed only with rust prevention. Further, the material is not limited to iron, and other various metals, wood-based materials, chemical materials, and the like can be used.
[0024]
Hereinafter, a specific construction procedure of the stair method using the natural stone fixed stair unit according to the first embodiment will be described. First, as shown in FIG. 6, the slope 11 is shaped according to a design gradient for seawall protection, and a suction inhibitor is applied on the slope 11. The wrap allowance of the suction inhibitor is set to 10 cm or more. Next, as shown in FIG. 7, layout markings 12 are formed on the slope 11 by spraying or the like.
[0025]
Next, as shown in FIG. 8, the stair unit 9 is hung using the hanging ring 5 by the wire 15 hanging from the tip of the boom 14 of the truck crane 13, and the stair unit 9 is brought into close contact with the layout marking 12 on the slope 11. Let it be installed. Next, the suspension ring 5 adjacent to the stair unit 9 installed on the layout marking 12 is connected and fixed by using the shackle 6 which is a connection fitting shown in FIG.
[0026]
Next, a second embodiment of the present invention will be described. As shown in FIG. 9, the staircase construction method to which the present invention is applied is not limited to the staircase structure 16 using the staircase unit 9 in which the natural stones 4 and 4 are rectangular or square in plan view as described in the first embodiment. There is also a staircase structure 17 using a staircase unit in which the stones 4, 4 are partially curved in plan view. In view of this, the second embodiment provides an example of a structure using a staircase unit that is partially curved in plan view, and is processed by combining straight lines and curves as shown in the plan views of FIGS. A plurality of types of natural stones 18, 19, 20, 21, 22 are arranged side by side on the upper surface of a separately prepared frame in a stepwise manner (see FIG. 2). Each of the natural stones 18, 19, 20, 21, and 22 is fixed on the frame by the bolts 8 to form the stair unit 23 shown in the plan view of FIG. 15, and the stair unit 23 is mounted on a seawall having a curved portion. And a suspension ring (not shown in FIG. 15) fixed in cutouts 19a and 22a formed at ends of natural stones 19 and 22 in the illustrated example. Curved plan view by the stair method Seawall construction is completed.
[0027]
【The invention's effect】
As described in detail above, according to the present invention, a natural stone-fixed staircase unit is hung by a wire, installed on a seawall slope, and an adjacent hanger ring is connected and fixed by using a metal fitting, so that a seawall staircase by a staircase method. Since the construction can be completed, the construction time can be shortened and the cost can be reduced as compared with the conventional method of solidifying the embankment with concrete and the stone masonry method. In addition, between the obtained revetment stairs, plants thrive as water is replenished, and these plants cover the steel frame, creating a natural landscape and destroying the natural ecosystem of the river. Therefore, a natural stone-fixed staircase unit and a staircase method can be realized, which is preferable from the viewpoint of environmental protection because self-cleaning action is obtained.
[0028]
In particular, by combining a frame member having a predetermined width and a support member in a plane and then welding the intersections to form a steel frame, it is possible to obtain a united natural stone fixed stair unit that is flat and integrated as a whole, This greatly improves the ability to achieve strength and stability that can withstand heavy loads. Also, unlike the conventional method using wire mesh or laying blocks, the stone-clad mat does not twist or warp during suspension work, so the stair unit itself has good shape retention and can be repaired after construction There is no need for construction work, and it has the advantage of being more durable than wire mesh.
[0029]
On a revetment slope with many irregularities, a natural stone-fixed staircase unit constructed by imparting flexibility to the support member can be closely laid on the slope to follow the undulation by the weight of the natural stone. . Furthermore, the natural stone is supported and fixed as a surface at the intersection of the support members, and the arrangement of the natural stone and the aesthetic appearance after the construction are excellent, and the scenery can be improved.
[0030]
Therefore, according to the present invention, it is possible to improve the workability of stair construction on a slope protection slope, reduce the construction cost, and enhance the durability after the construction, and perform the construction in a more natural manner, thereby protecting the environment and landscape. It is possible to provide a natural stone-fixed staircase unit that is preferable also from the viewpoint of a staircase method using the unit.
[Brief description of the drawings]
FIG. 1 is a plan view of a frame used in a first embodiment of the present invention.
FIG. 2 is a side view showing the configuration of the staircase unit of the first embodiment.
FIG. 3 is a plan view of FIG. 2;
FIG. 4 is an essential part perspective view showing a state where natural stone is fixed to a frame.
FIG. 5 is a schematic diagram showing a connection point of natural stones.
FIG. 6 is a schematic diagram showing an initial state of a staircase method using a natural stone stuck unit.
FIG. 7 is a schematic diagram showing a state in which layout marking is performed on a slope.
FIG. 8 is a schematic diagram showing a practical example of installing a stair unit on a revetment slope.
FIG. 9 is a perspective view showing an example of a staircase construction method on a seawall for a second embodiment of the present invention.
FIG. 10 is a plan view showing an example of the shape of a natural stone used in the second embodiment of the present invention.
FIG. 11 is a plan view showing another example of the shape of a natural stone used in the second embodiment of the present invention.
FIG. 12 is a plan view showing another example of the shape of a natural stone used in the second embodiment of the present invention.
FIG. 13 is a plan view showing another example of the shape of a natural stone used in the second embodiment of the present invention.
FIG. 14 is a plan view showing another example of the shape of a natural stone used in the second embodiment of the present invention.
FIG. 15 is a plan view showing a staircase unit according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Frame 2 ... Frame member 3 ... Support members 4, 18, 19, 20, 21, 22 ... Natural stone 4a ... Notch 5 ... Hanging ring 6 ... Shackle 8 ... Bolt fastening 9, 23 ... Stair unit 10 ... Hole 11 ... Slope 12 ... Layout marking 13 ... Truck crane 14 ... Boom 15 ... Wire reference number P3518

Claims (7)

A plurality of natural stones formed by forming a steel frame by combining a frame member having a predetermined width and a support member in a plane and welding the intersections, and processing the steel frame into a triangular prism having a substantially triangular cross section. The natural stone fixed stair unit is characterized in that a natural stone fixed stair unit is produced by supporting and fixing the natural stone fixed stair unit, and the natural stone fixed stair unit is used as a mat to be installed on a revetment slope. The natural stone fixed staircase unit according to claim 1, wherein a frame member having a predetermined width is arranged in a rectangular shape or a square shape, and a support member is fixed vertically and horizontally inside the frame member to form a steel frame. A frame member having a predetermined width is configured to be partially curved in a plan view, a support member is fixed vertically and horizontally inside the frame member and a cross section is welded to form a steel frame, A natural stone-fixed stair unit is produced by supporting and fixing a large number of natural stones formed into a curved columnar body having a substantially triangular cross section by combining a straight line and a curve on the steel frame. A natural stone-fixed staircase unit used as a mat to be placed on a surface. The natural stone fixing staircase unit according to claim 1, 2 or 3, wherein a hole for bolt insertion is formed in an intersection of the support member. 5. The natural stone staircase unit according to claim 1, 2, 3, or 4, wherein the frame member and the support member have appropriate flexibility to follow ups and downs of the ground. A large number of natural stones formed by forming a steel frame by combining a frame member having a predetermined width and a support member in a plane and welding the intersections, and processing the steel frame into a triangular prism having a substantially triangular cross section. A bank protection method in which a natural stone-fixed stair unit is manufactured by supporting and fixing the natural stone-fixed stair unit, and the natural stone-fixed stair unit is suspended by a wire hanging from the boom tip using a suspension ring fixed in the cutout of natural stone A staircase construction method using a natural stone-fixed staircase unit, characterized in that the suspension rings are installed in close contact with each other on a surface, and adjacent suspension rings are connected and fixed using connection fittings. The natural stone-fixed staircase unit according to claim 6, wherein the steel frame is made flexible to form a natural stone-fixed staircase unit, and the weight of the natural stone causes the steel frame to follow the undulation of the ground. Stairs construction method.

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