JP5761668B2 - Waterway lining structure - Google Patents

Description

  The present invention relates to a lining structure for protecting a water channel such as a sand discharge channel of a water intake dam.

  If the waterbed in the mountainous area such as the sand drainage channel of the intake dam is made of concrete, the surface of the roadbed will be worn away by the debris that flows, so frequent repairs will be necessary and maintenance costs will increase. It can be very expensive. On the other hand, a technique for protecting a water channel is known as a lining structure in which a metal lining material is laid on a portion of a water channel floor that is easily worn by dirt or the like.

  For example, in the lining structure proposed in Patent Document 1, a grid-like gantry is fixed in a recess provided in a subgrade of a water channel, and legs are provided on the back of a plate-like main body on the gantry. The lining material is placed in a state where the lining material legs are suspended from the gantry, and concrete is placed between the lining material body and the bottom surface of the recess, so that the lining material legs Is fixed with concrete, and with a simple structure, a strong lining can be applied to the subgrade floor.

JP 2003-278135 A

  However, in the lining structure of Patent Document 1 described above, the flow direction and width of the water channel when placing the lining material on the pedestal, even if the pedestal is accurately fixed to the recess of the roadbed based on surveying during construction. Regardless of the direction, there is no choice but to perform alignment of the lining material by relying on the operator's visual observation, and there is room for improvement in that it takes time to position the lining material.

  In particular, when the water channel is inclined along the flow direction, the lining material may be displaced by gravity only by placing the lining material on the mount. Work such as welding and fixing the materials one by one to the gantry was necessary, and the construction was very laborious.

  Then, this invention makes it a subject to reduce the load of the positioning operation | work of the lining material at the time of construction in the lining structure of a water channel.

  In order to solve the above-mentioned problems, the present invention fixes a grid-like gantry in a recess provided on the floor of a water channel, and a leg is provided on the back of the plate-like main body on the gantry. Place the lining material, suspend the legs of the lining material in the gantry, place concrete between the main body of the lining material and the bottom surface of the recess, In the lining structure of the water channel in which the legs are fixed with concrete, a configuration is adopted in which positioning members that contact the legs of the lining material are provided on the gantry. According to this configuration, at the time of construction, the lining material can be positioned more easily than before by placing the lining material on the gantry so that the leg portions thereof are in contact with the positioning member of the gantry.

  Here, when the water channel is inclined along the flow direction, the positioning member of the gantry may be in contact with the leg portion of the lining material from the lower side of the inclination of the water channel. In this way, the position of the lining material can be prevented from being displaced due to gravity when the lining material is placed on the gantry, so that the labor required for construction can be greatly reduced.

  Further, the leg portion of the lining material may be composed of a rod-shaped portion that comes into contact with the positioning member of the gantry and a protruding portion that protrudes from the lower portion thereof. If it does in this way, it can prevent that a lining material slips out in the axial direction of the leg part, and can make lining stronger.

  As described above, the lining structure of the water channel according to the present invention is such that the positioning member that contacts the leg portion on the back side of the lining material is provided on the grid-like gantry on which the lining material is placed. Is placed on the pedestal so that the leg part comes into contact with the positioning member of the pedestal, it is possible to reduce the load of the positioning work of the lining material as compared with the prior art.

Longitudinal front view of waterway with lining structure of embodiment The perspective view of the principal part of the lining structure of FIG. Front view of FIG. Plan view of FIG. a is an arrow view from the direction of the arrow Va in FIG. 4, b is a cross-sectional view along the line Vb-Vb in FIG. a to d are a plan view, a front view, a perspective view, and a perspective view from the back side of the lining material of FIG. a and b are a front view and a side view of another lining material. a and b are front views of further different lining materials, respectively. a and b are a plan view and a side view of another lining material. a and b are a plan view and a front view of still another lining material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the lining structure of the water channel includes an inclined portion A that is inclined along the flow direction in the sand discharge channel (water channel) of the intake dam, and an inclined portion from the flat portion on the upstream side and the downstream side thereof. A recess 1 having a certain depth is excavated on the roadbeds of transition portions B and C to A, and a leg portion is provided on the back surface of the plate-like main body 3a on a grid-like gantry 2 fixed in the recess 1 A large number of lining materials 3 provided with 3b are placed, and the legs 3b of the lining material 3 are suspended in the gantry 2, and the concrete is placed between the main body 3a of the lining material 3 and the bottom surface of the recess 1. 4, and the leg 3 b of the lining material 3 is fixed with concrete 4. Although not shown in the figure, the concrete body with the anchor bolts is placed on the bottom surface of the recess 1, and the gantry 2 is fixed in the recess 1 by being welded to the anchor bolts through the reinforcing bars. Has been. The gantry 2 has a structure in which several types of unit gantry are connected in the flow direction and the width direction of the water channel.

  2 to 5 show a unit frame 2 a installed on the most upstream side of the frame 2. The unit frame 2a is formed by welding four leg members 6 made of the same angle material to each of two horizontal members 5 made of an angle material having an L-shaped cross section at equal intervals. The leg members 6 arranged parallel to each other and facing each other in the flow direction of the water channel are joined by welding to the vertical member 7, and the horizontal members 5 are arranged at the same position in the water channel width direction as the leg member 6. It is mainly composed of one that is joined to the first vertical frame member 8 by welding.

  One end of second and third vertical frame members 9 and 10 extending in the flow direction of the water channel is welded to the surface opposite to the opposing surface of each horizontal member 5, and these vertical frame members 9 are welded. 10 are welded to the horizontal frame member 11, respectively. Thereby, the lattice which consists of the horizontal member 5, each vertical frame member 8, 9, 10, and the horizontal frame member 11 is formed. And the edge part of the main-body part 3a of the lining material 3 is mounted on each edge | side of each frame of the grating | lattice, and the leg part 3b of the lining material 3 is suspended in the mount frame 2a.

  The second and third vertical frame members 9 and 10 are arranged at positions shifted in the channel width direction by a half of the interval from the position where the first vertical frame member 8 is arranged. Thereby, the lining material 3 is arrange | positioned in the state shifted | deviated for every sheet along the flow direction of a water channel. The first and third vertical frame members 8 and 10 are substantially the same length, whereas the second vertical frame member 9 is approximately half the length thereof and is disposed on the most upstream side of the water channel. As the lining material (not shown), a material whose surface area is half that of the lining material 3 shown in FIG. 2 is used.

  Each horizontal frame member 11 is welded with the upper ends of the auxiliary legs 12 and 13 facing the leg member 6 in the flow direction of the water channel. The downstream side auxiliary leg 13 has substantially the same length as the leg member 6, and the upstream side auxiliary leg 12 has a shorter length. The lower end of the upstream auxiliary leg 12 is welded to the upstream end of the vertical member 7, and the central part of the downstream auxiliary leg 13 is welded to the downstream end of the vertical member 7.

  The first and third vertical frame members 8 and 10 are welded to the upper end portion of the suspension member 14 extending into the gantry 2a at a position closer to the upstream side of the central portion in the longitudinal direction. And the two positioning members 15 extended in the width direction of a water channel are welded to the lower end part of each suspension member 14 in the multiple places of the longitudinal direction, and the lining material 3 suspended in the unit stand 2a It abuts on the upstream leg 3b from the downstream side.

  Note that, among the members constituting the unit mount 2a, the prism members having the same rectangular cross section are used for members other than the transverse member 5 and the leg member 6 made of an angle member. However, one end portions of the second and third vertical frame members 9 and 10 are processed into a shape that can be firmly welded to the horizontal member 5.

  Further, the various unit mounts other than the most upstream unit mount 2a are partly changed in accordance with the inclination of the concave portion 1, the shape of the side wall, etc. In this case, the positioning member 15 is in contact with the leg portion 3b on the upstream side of the lining material 3 from the downstream side (see FIG. 1).

  On the other hand, the basic material of the lining material 3 is shown in FIGS. 2 to 4 and FIGS. 6 (a) to (d). The basic lining material 3 shown in these drawings is made of wear-resistant cast iron, and is provided with leg portions 3b in the vicinity of each corner portion on the back surface of the main body portion 3a which is a square flat plate, and the center of the back surface of the main body portion 3a. A tenth-order reinforcing rib 3c is provided in the portion.

  The leg portion 3b includes a cylindrical rod-shaped portion 3d and a flange portion (projecting portion) 3e protruding from the lower end thereof. Thus, by providing the collar part 3e in the leg part 3b, it becomes difficult for the lining material 3 to come out to the axial direction of the leg part 3b, and a firm lining can be formed.

  The lining material 3 is configured such that the upstream leg portion 3b is in contact with the positioning member 15 of the gantry 2 at a position near the upper end of the central portion in the longitudinal direction of the rod-shaped portion 3d (see FIG. 3). The contact position of the leg 3b of the lining material 3 with the positioning member 15 may be slightly shifted in the vertical direction. Therefore, the positioning member 15 does not need to be accurately installed in the vertical direction and is easy to install. In addition, the lining material 3 can be manufactured at low cost because it does not require finishing for accurately forming the length of the leg 3b.

  In addition, although it is possible to install the positioning member of the pedestal so as to contact the root portion of the leg portion of the lining material, in that case, it is formed at the base portion of the leg portion when the lining material is integrally cast. The process of removing the rounded shape, the operation of separately casting and welding the main body portion and the leg portion of the lining material, and the like are necessary, which increases the manufacturing cost of the lining material. Therefore, it is desirable to set the contact position between the positioning member and the leg portion of the lining material as in the embodiment.

  About various lining materials other than the basic form mentioned above, since the dimension and shape of a basic form were changed according to the installation position etc., the example of a part is shown in FIG. 7 thru | or FIG. Briefly described.

  The lining material 3 shown in FIGS. 7A and 7B is disposed at a position in contact with the side wall of the recess 1 and has an apron 3f on the side surface of the main body 3a.

  The two types of lining materials 3 shown in FIGS. 8A and 8B are both arranged at the boundary between the flat portion of the concave portion 1 and the inclined portion on the downstream side thereof, and are downstream of the main body portion 3a. Has an inclined portion 3g inclined downward. In the example of FIG. 8B, the apron 3f is provided on the side surfaces of the main body portion 3a and the inclined portion 3g, as in the example of FIG.

  The lining material 3 shown in FIGS. 9 (a) and 9 (b) has a main body portion 3a formed in a rectangular shape that is half the basic shape in plan view, and has only two leg portions 3b provided on the back side thereof. The reinforcing rib 3c is formed in a T shape between the two leg portions 3b. Moreover, it has the apron 3f on the side surface of the main-body part 3a.

  In the lining material 3 shown in FIGS. 10A and 10B, the main body portion 3a and the inclined portion 3g provided on the downstream side thereof are each formed in a half rectangle of each example of FIG. 8 in plan view. However, like the example of FIG. 9, there are only two leg portions 3b, and the reinforcing rib 3c is formed in a T-shape. Moreover, the apron 3f is provided in the side surface of the main-body part 3a and the inclination part 3g similarly to the example of FIG.8 (b).

  Description of the other types of lining materials is omitted, but all of them have leg portions that contact the positioning member 15 of the gantry 2 on the back side of the main body portion, including the examples of FIGS. 7 to 10 described above. It is the same as the basic form.

  The lining structure of the water channel has the above-described configuration, and when the lining material 3 is placed on the gantry 2 at the time of construction, the upstream side of the legs 3b of the lining material 3 that is suspended in the gantry 2 Since the positioning of the lining material 3 can be performed in contact with the positioning member 15 of the gantry 2, the positioning of the lining material 3 is not time-consuming as compared with the prior art.

  Particularly, in the inclined portion A of the water channel, the positioning member 15 of the gantry 2 is brought into contact with the leg portion 3b of the lining material 3 from the lower side of the inclination of the water channel, so that when the lining material 3 is placed on the gantry 2 The position of the lining material 3 does not shift due to the gravity, and the work of fixing the lining material to the gantry is not required as in the prior art, and the time and labor required for the construction can be greatly reduced as compared with the prior art.

  Moreover, in this lining structure, since the edge part of the main-body part 3a of the lining material 3 is mounted on the frame | frame of the grid of the mount frame 2, the reinforcement rib 3c is provided in the center part of the back surface of the main-body part 3a of the lining material 3. There is also an advantage that a strong lining can be formed.

DESCRIPTION OF SYMBOLS 1 Recess 2 Base 2a Unit base 3 Lining material 3a Main body part 3b Leg part 3c Reinforcement rib 3d Rod-like part 3e Collar part (protrusion part)
4 Concrete 15 Positioning member A Inclined part of waterway

Claims (3)

A grid-like gantry is fixed in a recess provided on the floor of the water channel, and a lining material provided with legs on the back of the plate-like main body is placed on the gantry, and the gantry is placed in the gantry. In a lining structure of a waterway in which the legs of the lining material are suspended, concrete is placed between the main body portion of the lining material and the bottom surface of the recess, and the legs of the lining material are fixed with concrete, A lining structure for a water channel , wherein a positioning member that extends in the width direction of the water channel and abuts against a leg portion of the lining material is provided on the frame.   The said water channel inclines along a flow direction, The positioning member of the said mount is contact | abutted to the leg part of the said lining material from the downward side of the inclination of the said water channel. Waterway lining structure.   The lining structure for a water channel according to claim 1 or 2, wherein the leg portion of the lining material comprises a rod-like portion that comes into contact with a positioning member of the gantry and a protruding portion that protrudes from a lower portion thereof. .

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