JPH0315720Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an independent tower-type water intake tower for a cylinder gate for intake of surface water provided in a reservoir.

[Conventional technology]

There are two types of water intake towers as described above: those installed along the dam, and those installed independently from the dam.

In the case of this independent tower, conventionally, as shown in Figures 6 and 7, six pillars 2 are vertically erected on the foundation 1 at positions corresponding to the apex angles of a regular hexagon, and each pillar 2 is placed at an appropriate interval. At the same time, a diagonal member 4 is fixed to the connecting part between the support column 2 and the horizontal member 3, and each of the cylinder gates 7 is connected to a guide rail 6 provided on a guide column 5 inside the support column 2. The rope 1 is moved by a hoisting machine in the operation chamber 9 at the upper end supported by each support 2 by engaging the rollers at the tip of the arm 8 provided on the sliding tube.
The cylinder gate 7 is expanded and contracted through the cylinder 0.

[Problem that the idea aims to solve]

In the case of the conventional independent tower described above, its total height is the buckling length L, so each member needs to have a large cross section with enough strength to accommodate the long buckling length. It is economically disadvantageous to construct a frame structure using materials. Also,
In terms of maintenance, tower bodies often have to be painted, but maintenance is difficult because they have a large surface area and are underwater structures. For this reason, it is conceivable to use a material such as stainless steel, but this poses problems such as being extremely expensive.

Therefore, the technical object of this invention is to provide a tower body for a cylinder gate for selective water intake which can eliminate the drawbacks of the conventional ones as described above.

[Means for solving problems]

The technical measures taken to solve the above problems are to place multiple outer columns at the apex angles of the polygon, and to place multiple inner columns at the intersections of the diagonals of the polygon. , these outer and inner columns are connected by horizontal members arranged in multiple stages, creating a structure in which a large number of trusses are combined for each horizontal plane of each step, and diagonal members are placed between the horizontal members above and below the outer supports. All of the outer struts, inner struts, horizontal members, diagonal members, and their intersections are completely covered with a concrete layer, and the necessary inner struts are equipped with guide rails to guide each sliding pipe of the cylinder gate. This is what we have set up.

[Effect]

This idea has the above-mentioned structure. Inside the tower body, which has a truss structure with a small buckling length L', the cylinder gate expands and contracts using guide rails fixed to the required inner columns as a guide, and the water intake at the upper end of the cylinder gate expands and contracts. The surface water of the reservoir is taken from the reservoir.

〔Example〕

Next, to explain an example, 11 in FIGS. 1 and 2 are six external supports provided on the foundation 1,
These outer supports 11 are connected by a large number of horizontal members 12 arranged in multiple stages, so that each stage has a hexagonal shape.

Reference numeral 13 denotes six inner columns arranged inside the hexagon formed by the outer columns 11 and the horizontal members 12, and each of the inner columns 13 also has a horizontal member 14 in the same horizontal plane as the horizontal members 12 of each stage. are connected to form a hexagon.

In addition, the inner support 13 is located between the outer support 11, and the outer support 11 and the inner support 13 are connected to the horizontal member 1.
2 and 14 are connected by a horizontal member 16 on the same plane.

In this way, each support 11, 13 is connected to the horizontal member 12, 1.
4 and 16, and the intersections of each outer support 11 and each horizontal member 12 are diagonally connected by diagonal members 17.

Reference numeral 20 denotes a cylinder gate, which, as is well known, is composed of a plurality of sliding tubes with different diameters. Three arms 21 are provided on the outside of each sliding tube, and the cylinder gate is provided with three arms 21 on the outside of each of the sliding tubes. A roller or the like at the tip of each arm 21 is engaged with a guide rail 22 fixed to the guide rail 22 .

Reference numeral 23 denotes an operation chamber at the upper end supported by each pillar 11, and the cylinder gate 20 is expanded and contracted by a hoisting machine inside the chamber via a rope 24, which is the same as a known cylinder gate.

FIG. 3 shows a cross section of the outer support 11, in which a concrete layer 26 is provided on the outside of the steel pipe 25. A large number of reinforcing members 27 of arbitrary shapes are welded to the steel pipe 25 in order to improve the connection with the concrete layer 26 and increase the strength. Further, a gusset plate 28 is welded to the steel pipe 25.

The inner support 13 has a similar structure as shown in FIG. 4, and is made by welding a reinforcing material 30 and a gusset plate 31 to a steel pipe 29, and wrapping a concrete layer 32 around it.

Fig. 5 shows the joint between the outer support 11, the horizontal member 12, and the diagonal member 17, in which the outside of the shaped steel 33, 34, which forms the frame of the horizontal member 12 and the diagonal member 17, is covered with concrete layers 35, 36. The shaped steels 33 and 34 are fixed to the gusset plate 28 by means of rivets, welding, or the like.

Outer support 11, inner support 13, horizontal member 12, diagonal member 1
Concrete layer 26, 32, 35, 36 such as 7
It is appropriate to form this in a factory, but in this case, a concrete layer is not formed at the attachment part of the gusset plate 28 of the outer support 11 and at both ends of the shaped steels 33 and 34 of the horizontal member 12 and diagonal member 17. After assembling the tower on-site, it is recommended to provide a concrete layer on the outside of these joints as shown in Figure 5.

However, it goes without saying that all of the concrete layers may be formed on site.

Also, although not shown, the horizontal members 14 and 16
Similarly to the horizontal member 12, the horizontal member 12 is a shaped steel coated with concrete, and the joints thereof are also the same as shown in FIG.

The embodiments shown in Figures 1 and 2 show a case where there are 6 outer columns and 6 inner columns, but it is also possible to use an octagonal shape with 8 outer columns and 4 inner columns. be.

As described above, the plurality of outer columns 11 and inner columns 13 are placed on the same horizontal plane, and the horizontal members 12, 14, 16
are connected together to form a combination of isosceles triangular trusses in each stage, and the outer support 11, the inner support 13, the horizontal members 12, 14, 16, and the diagonal members 17.
completely covered with a concrete layer.

In the above embodiment, the hoisting load at all times is a load in the vertical direction, and is mainly borne by the outer support 11, the inner support 13, and the horizontal member 12 and diagonal member 17 connected to the outer support 11. Therefore, the length between the horizontal members 12, 14, and 16 in the vertical direction can be considered as the buckling length L'.

In addition, the horizontal force during an earthquake is calculated by (horizontal seismic intensity) x (mass), but mainly the cylinder gate 2
The mass of water inside and outside 0 shows a large ratio. This horizontal force is applied to the inner column 13 via the guide rail 22 from a roller attached to the outer arm 21 of the cylinder gate 20, and then to the outer column 11 via the horizontal member 16, and then to the outer column 11, the horizontal member 12 , and is transmitted to the outer tower panel made up of diagonal members 17 and the like.

〔effect〕

As mentioned above, the independent tower of this invention has an outer support at the apex position of the polygon, an inner support at the intersection of each diagonal, and each intersection is connected with a horizontal member, and between the outer supports A strong truss structure with a shortened buckling length has been constructed by placing diagonal members in the structure, making it possible to reduce the cross-sectional area of the steel pipes and steel shapes that form the framework of the outer and inner supports, horizontal members, diagonal members, etc. . In addition, it is possible to use lightweight aggregate for the concrete covering the outside of steel pipes and shaped steel, and since concrete using this lightweight aggregate has a considerably lighter specific gravity than steel pipes and shaped steel, it is possible to use concrete to cover the outside of steel pipes and shaped steel. However, compared to conventional independent towers of the same scale made only of steel, there is no risk of the total weight increasing, and there is an advantage in that material costs can be reduced. Furthermore, since all parts are completely covered with concrete, there is no need to use expensive special steel materials such as stainless steel or clad steel, and unlike when the construction is made only of ordinary steel, it is not necessary to rust every year. This eliminates the need for anti-corrosion paint, making maintenance and management easier.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the independent tower of this invention, Fig. 2 is an enlarged cross-sectional plan view of the same, Fig. 3,
Fig. 4 is an enlarged cross-sectional view of the outer support and inner support, Fig. 5 is an enlarged cross-section of the joint between the outer support and horizontal members, etc., Fig. 6 is a front view showing an example of a conventional independent tower, and Fig. 7 is an enlarged cross-sectional view of the outer support and the inner support. The figure is a cross-sectional plan view of the same as above. 11...Outer support, 12,14,16...Horizontal member, 13...Inner support, 17...Diagonal member, 26,3
2, 35, 36... concrete layer.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of outer supports are arranged at the apex angles of a polygon, a plurality of inner supports are arranged at the intersections of diagonals of the polygon, and each of these outer supports is arranged at the intersection of diagonals of the polygon. The struts and inner struts are connected by horizontal members arranged in multiple stages, and a large number of trusses are combined for each horizontal plane of each stage. Diagonal members are placed between the horizontal members above and below the outer struts, and the outer struts, For cylinder gates, all of the inner struts, horizontal members, diagonal members, and their intersections are completely covered with a concrete layer, and the required inner struts are equipped with guide rails to guide each sliding pipe of the cylinder gate. independent tower. (2) An independent tower for a cylinder gate as set forth in claim 1 of the utility model registration, in which the outer supports are arranged so as to spread out at the base.