JP3903377B2 - Steel sabo dam with double wall structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is a steel sabo dam with a double wall structure, and in particular, can be easily and inexpensively constructed in a short period of time, and it is difficult for displacement and deformation to occur on the dam wall surface during and after construction. This is related to a steel sabo dam with a double wall structure that does not cause the outflow of filling material.
[0002]
[Prior art]
There is a steel sabo dam with a double wall structure as a steel sabo dam. This sabo dam is constructed by filling an intermediate filling material such as earth and sand between two steel wall surfaces formed facing each other and rolling the intermediate filling material.
[0003]
Hereinafter, an example of this conventional steel sabo dam having a double wall structure will be described with reference to the drawings.
[0004]
As shown in FIG. 7, the steel sheet pile cut to a length that can be transported by human power is the segment 22, and the adjacent segments 22 in the horizontal direction are in a positional relationship that is shifted by a half pitch in the vertical direction. When the segments 22 are connected to each other using the claws and grooves of the steel sheet pile and the lower portions of the upstream side wall surface 21A and the downstream side wall surface 21B are constructed in this way, both the wall surfaces 21A and 21B are connected to each other by the tie rods 23. Then, the earth and sand 24 is packed in between the wall surfaces 21A and 21B as an intermediate packing material and rolled. Then, the construction of the wall surface of the next stage, the connection of both wall surfaces, filling and rolling are repeated as in the case of the lower stage. In this way, a conventional steel sabo dam with a double wall structure is constructed.
[0005]
[Problems to be solved by the invention]
However, the conventional sabo dam described above has the following problems.
[0006]
(1) The construction period is long.
The segments 22 need to be cut to a predetermined length, and the segments 22 are constructed by connecting them one by one, so that it takes a long time to construct the dam.
[0007]
(2) The dam wall surfaces 21A and 21B are likely to be displaced or deformed.
Since the connecting portion between the segments 22 has a margin for facilitating the connection, when a load such as earth pressure or water pressure is applied to the dam wall surfaces 21A and 21B, tension or pressing force acts on the segments 22. To do. As a result, the dam wall surfaces 21A and 21B are likely to be displaced or deformed. In order to prevent displacement and deformation of the dam wall surfaces 21A and 21B, the construction cost increases when abdominal materials are frequently used. In addition, in this case, since the erection material is used as a horizontal member, it does not act effectively in ensuring the flatness of the dam wall surfaces 21A and 21B in the vertical direction.
[0008]
(3) The filling material may flow out from the gap between the longitudinal ends of the segment 22.
The dam wall surfaces 21 </ b> A and 21 </ b> B are constructed one by one from the bottom, but the end portions in the vertical direction of the segment 22 are merely in contact with each other, and the segment 22 is bent due to bending of the cut surface of the segment 22, dimensional error, and the like. There is a gap between the vertical ends of the two. Therefore, the filling material such as earth and sand may flow out from the gap. If the filling material flows out, the inside of the dam becomes hollow and the function of the dam body is lost.
[0009]
(4) The dam wall surfaces 21A and 21B may not be constructed.
The problem (2) occurs not only after dam construction but also during dam construction. If displacement or deformation of the dam wall surface occurs during dam construction, the segments 22 may not be connected to each other depending on the degree of displacement or deformation. Moreover, even if it can connect, since the shape of dam wall surface 21A, 21B cannot be constructed | assembled in a predetermined shape, it may have to start over. In this type of dam, the dam wall surfaces are generally inclined inward from each other and are not vertical, which promotes the above-mentioned problems.
[0010]
Accordingly, the object of the present invention is to allow easy and inexpensive construction in a short period of time, and to prevent displacement and deformation of the dam wall surface during and after construction, and also the possibility of outflow of filling material from the dam wall surface. This is to provide a steel sabo dam with a double wall structure.
[0011]
[Means for Solving the Problems]
The invention according to claim 1 is packed between the upstream side wall surface, the downstream side wall surface, the connecting means for connecting the upstream side wall surface and the downstream side wall surface, and the upstream side wall surface and the downstream side wall surface. In the steel sabo dam having a double wall structure provided with a filling material, the upstream side wall surface and the downstream side wall surface are respectively inserted between columns that are fixed at a distance from each other and adjacent columns. A corrugated steel sheet as a wall panel to be passed, and a fixing block for fixing the corrugated steel sheet to the strut, which is inserted into a gap formed between the strut and an end of the corrugated steel sheet. An end portion in a direction orthogonal to the corrugation direction is fixed to the support column.
[0012]
The invention according to claim 2 is characterized in that the support column is made of an H-shaped steel or an I-shaped steel, and the end portion of the corrugated steel sheet is inserted between flanges of the H-shaped steel or the I-shaped steel. It is what has.
[0013]
The invention according to claim 3 is that the fixed block has a box shape and is formed in a front shape convex shape so as to fit in the gap formed between the support column and the end portion of the corrugated steel plate. And it has the characteristic that it has a baseplate which closely_contact | adheres to the web of the said support | pillar so that the said filling material may not flow out, and is press-fitted in the said clearance gap by elastic force.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a steel sabo dam having a double wall structure according to the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a partially cutaway schematic perspective view showing a steel sabo dam having a double wall structure according to the present invention, and FIG. 2 is an exploded perspective view showing a fixing structure of corrugated steel plates in the steel sabo dam having a double wall structure according to the present invention. 3 is a partial sectional view showing a dam wall surface in a steel sabo dam having a double wall structure according to the present invention, FIG. 4 is a sectional view taken along line AA in FIG. 3, and FIG. 5 is a sectional view of the double wall structure according to the present invention. FIG. 6 is a perspective view showing a fixed block in a steel sabo dam having a double wall structure according to the present invention.
[0016]
1 to 6, reference numeral 1A denotes an upstream side wall surface and 1B denotes a downstream side wall surface, which have the same structure and are constructed so as to be inclined inward from each other. Both wall surfaces 1 </ b> A and 1 </ b> B serve as a wall panel that is extended between adjacent columns 2 and a column 2 made of H-shaped steel that is fixed in a row at intervals along each construction position. It consists of a corrugated steel plate 3 and a fixed block 4 for fixing the corrugated steel plate 3 to the support column 2 inserted into a gap (S) formed between the support column 2 and the end of the corrugated steel plate 3.
[0017]
Both the two columns are inclined inward from each other. The column 2 may be an I-shaped steel other than the H-shaped steel. The corrugated steel sheet 3 is fixed to the support column 2 through the fixed block 4 without rattling at the end in the direction orthogonal to the corrugated direction.
[0018]
The fixed block 4 is made of steel or resin and has a box shape as shown in FIGS. 2 and 6. The first side plate 4 </ b> A is in close contact with the inner surface of the inner flange 2 </ b> A of the column 2, and the valley surface of the corrugated steel plate 3. It is formed by a second side plate 4B that is in close contact with 3A, a third side plate 4C that connects the first side plate 4A and the second side plate 4B, and a bottom plate 4D.
[0019]
The front shape of the fixed block 4 is formed in a convex shape so as to fit into the gap (S) formed between the support column 2 and the end of the corrugated steel plate 3. Since the fixed block 4 has the bottom plate 4D, even if the web 2C of the support column 2 and the end surface of the corrugated steel plate 3 are not in close contact with each other, it is possible to prevent the filling material described later from flowing out.
[0020]
A part of the third side plate 4C is cut so that the fixed block 4 has a spring function, and the cut end portions are wrapped with each other. Thus, if the fixed block 4 is formed in advance, that is, the first side plate 4A, the second side plate 4B, and the parallel portion 4C1 of the third side plate 4C are formed in advance in the direction of the arrow in FIG. In this case, the corrugated steel plate 3 can be firmly pressed against the inner surface of the outer flange 2B of the column 2 by press-fitting the fixing block 4 against the elastic force in the gap (S). Moreover, since the cut end portions of the third side plate 4C are wrapped with each other, there is no possibility that the filling material flows out from the cut portion of the third side plate 4C after the fixed block 4 is press-fitted.
[0021]
Reference numeral 5 denotes a tie rod as connecting means for connecting the upstream side wall surface 1A and the downstream side wall surface 1B. As shown in FIGS. 3 and 4, the tie rod 5 is fixed to the support column 2 via a joint 6 fixed to the outer surface of the inner flange 2 </ b> A of the support column 2. That is, the joint 6 includes two fixing plates 7 welded in parallel to the outer surface of the inner flange 2A of the support column 2 and a bolt 8 inserted between the two fixing plates 7, and includes a tie rod 5 The U-shaped end is engaged with the bolt 8.
[0022]
9 is a filling material such as earth and sand packed between the upstream side wall surface 1A and the downstream side wall surface 1B.
[0023]
The construction method of the steel sabo dam having a double wall structure according to the present invention constructed as described above will be described.
[0024]
First, the pillars 2 made of H-shaped steel are fixed in one row by inclining each other at intervals along the construction positions of the upstream side wall surface 1A and the downstream side wall surface 1B. At this time, there is a case in which an erection material is used for erection of the column 2. Next, the corrugated steel sheet 3 is passed between adjacent struts 2. This is done by inserting a corrugated steel plate 3 between the flanges 2A and 2B from the top of the column 2.
[0025]
Next, the fixed block 4 is driven into the gap (S) below the support column 2 from the side and press-fitted. Accordingly, the corrugated steel plate 3 is pressed against the inner surface of the outer flange 2B of the support column 2 and fixed.
[0026]
Next, an intermediate filling material 9 such as earth and sand is packed between the upstream side wall surface 1A and the downstream side wall surface 1B, and is pressed. The filling of the filling material 9 is performed up to the lower part of the attachment position of the tie rod 5. Thereafter, the struts 2 facing each other are connected by a tie rod 5. The corrugated steel plate 3 is pressed against the inner surface of the outer flange 2B of the support column 2 by the earth pressure of the rolled filling material 9 in addition to fixing by the fixing block 4 and is fixed.
[0027]
When the construction of the lower stage is completed in this way, the next stage filling material 9 is put on the lower stage filling material 9 to the lower part of the mounting position of the next stage tie rod 5 and rolled. Next, the lower portions of the opposing struts 2 are connected by a tie rod 5 at the next stage.
[0028]
If this work is repeated to the top, a double wall steel sabo dam is constructed. The corrugated steel plates 3 are connected by bolts or the like.
[0029]
According to the steel sabo dam of the double wall structure of the present invention, the support column 2 and the corrugated steel plate 3 do not need to be fixed by welding or the like, and since the support column 2 is used as a parent column, the number of members is small. Furthermore, since the corrugated steel plate 3 is used as the wall surface panel, the weight can be reduced. Therefore, it can be constructed easily and inexpensively in a short period of time.
[0030]
Moreover, since the corrugated steel sheet 3 is firmly fixed to the support column 2 without rattling by pressing the fixing block 4 into the gap (S) between the support column 2 and the corrugated steel sheet 3, the upstream side wall surface 1A and the downstream side Displacement and deformation hardly occur on the wall surface 1B.
[0031]
Furthermore, since the fixed block 4 has a box shape having a bottom plate 4D, even if there is a gap for inserting the corrugated steel plate 3 between the web 2C of the support column 2 and the corrugated steel plate 3, the upstream side There is no possibility that the filling material flows out from the wall surface 1A and the downstream side wall surface 1B.
[0032]
【The invention's effect】
As described above, according to the present invention, the dam wall surface can be easily and inexpensively constructed in a short period of time, and the dam wall surface is less likely to be displaced or deformed during and after the construction. Useful effects such as no fear of spillage.
[Brief description of the drawings]
FIG. 1 is a partially cutaway schematic perspective view showing a steel sabo dam having a double wall structure according to the present invention.
FIG. 2 is an exploded perspective view showing a corrugated steel plate fixing structure in a steel sabo dam having a double wall structure according to the present invention.
FIG. 3 is a partial sectional view showing a dam wall surface in a steel sabo dam having a double wall structure according to the present invention.
4 is a cross-sectional view taken along line AA in FIG.
FIG. 5 is a partial plan view showing a dam wall surface in a steel sabo dam having a double wall structure according to the present invention.
FIG. 6 is a perspective view showing a fixed block in a steel sabo dam having a double wall structure according to the present invention.
FIG. 7 is a schematic perspective view showing a conventional steel sabo dam having a double wall structure.
[Explanation of symbols]
1A: Upstream side wall surface 1B: Downstream side wall surface 2: Column 2A: Inner flange 2B: Outer flange 2C: Web 3: Corrugated steel plate 3A: Valley surface 4: Fixed block 4A: First side plate 4B: Second side plate 4C: Third Side plate 4D: bottom plate 5: tie rod 6: joint 7: fixing plate 8: bolt 9: filling material 21A: upstream side wall surface 21B: downstream side wall surface 22: segment 23: tie rod 24: earth and sand

Claims (3)

An upstream side wall surface, a downstream side wall surface, a connecting means for connecting the upstream side wall surface and the downstream side wall surface, and a filling material packed between the upstream side wall surface and the downstream side wall surface, In steel sabo dam with double wall structure,
The upstream side wall surface and the downstream side wall surface are each a column fixed at a distance from each other, a corrugated steel sheet as a wall panel passed between the adjacent struts, an end of the strut and the corrugated steel plate A fixed block for fixing the corrugated steel sheet to the support column, which is inserted into a gap formed between the corrugated steel part, and an end portion in a direction perpendicular to the corrugated direction of the corrugated steel sheet is fixed to the support column. A steel sabo dam with a double wall structure. The said support | pillar consists of H-shaped steel or I-shaped steel, The said edge part of the said corrugated steel plate is inserted between the flanges of the said H-shaped steel or the said I-shaped steel, The Claim 1 characterized by the above-mentioned. Steel sabo dam with double wall structure. The fixed block has a box shape, is formed in a front shape so as to fit into the gap formed between the support column and the end of the corrugated steel plate, and the filling material flows out. The steel sabo dam with a double wall structure according to claim 1 or 2, wherein the steel slab dam has a bottom plate that is in close contact with the web of the support column and is press-fitted into the gap by an elastic force.

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