JP2005299198A - Open channel renovating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an open channel renovating method preventing a trough from floating in construction without a fear of a water leakage because of providing no through hole in a renovation trough. <P>SOLUTION: An outer side face of the renovation trough provided on the inner peripheral surface of the open channel is provided with hanging implements with claws along the length direction of the renovation trough, and the inner peripheral surface of the open channel is provided with receiving implements for receiving the claws of the hanging implements. The renovation trough is axially moved along the open channel, and the claws of the hanging implements are fastened to the receiving implements to latch the renovation trough to the inner peripheral surface of the open channel. Unhardened liquid mortar is placed between the renovation trough and the open channel and hardened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an open channel rehabilitation method for preventing the rehabilitation trough from floating when repairing the inner peripheral surface of an existing open channel such as agricultural water and sewerage.

  Conventionally, as a method of repairing the inner surface of existing waterways such as agricultural water and sewers, the so-called concrete replacement method is generally used, in which a defective portion of the existing concrete on the inner surface is removed and concrete is re-launched on the removed portion. is there. This construction method requires work such as shaving off a defective portion of existing concrete, carrying it out, and driving in new concrete, resulting in a longer construction period.

  For this reason, for example, a fixing member is fixed to an inner peripheral surface of an existing water channel with an anchor bolt, and an FRP (fiber reinforced synthetic resin) plate is pasted on the entire inner peripheral surface of the water channel via the fixing member to form a rehabilitation trough. Thereafter, a construction method is known in which cement milk or the like is placed between the regeneration trough and the water channel inner peripheral surface, and an FRP plate is lined on the water channel inner peripheral surface (see, for example, Patent Document 1).

The rehabilitation trough is subjected to buoyancy that is applied when cement milk or the like is placed. However, the rehabilitation trough is fixed to the inner peripheral surface of the water channel by anchor bolts, so that the rehabilitation trough does not rise. However, the buoyancy received by a large trough increases, and it becomes necessary to increase the number of places where fixing members are provided or to increase the thickness of the trough.
Japanese Patent Publication No. 6-19132 gazette

  However, in the construction method of Patent Document 1, the rehabilitation trough penetrates the side surface or bottom surface of the rehabilitation trough and is fixed to the fixing member fixed to the inner peripheral surface of the existing water channel with a bolt or the like. Has a problem that a through hole through which a bolt is inserted is opened, water leakage may occur, and an extra work such as water stoppage may increase. This is a phenomenon that appears more prominently as the rehabilitation trough becomes larger.

  The present invention has been made for the purpose of providing an open channel rehabilitation method in which a rehabilitation trough is not provided with a through-hole, and therefore there is no risk of water leakage and the trough is prevented from floating during construction.

  The open channel rehabilitation method according to claim 1 (invention 1) is provided with a hook with a hook along the length direction of the rehabilitation trough on the outer surface of the rehabilitation trough provided on the inner peripheral surface of the open channel, A catch is provided on the peripheral surface to receive the claw of the hanging tool, the rehabilitation trough is moved in the axial direction along the open channel, and the rehabilitation trough is hung on the inner periphery of the open channel by hanging on the catch of the hanging tool. It is characterized by placing an uncured liquid mortar between the rehabilitation trough and the inner peripheral surface of the open channel and curing it.

  The open channel to which the present invention is applied is an open channel composed of concrete and other materials and having an aged water flow surface. The material of the rehabilitation trough is not particularly limited as long as it is generally used for the lining configuration. For example, rehabilitation troughs that combine plates such as synthetic resin plates, fiber reinforced synthetic resin (FRP) plates, resin concrete (FRPM) plates, precast concrete plates, stainless steel plates, anticorrosion iron plates, anticorrosion aluminum plates, wood plates, bamboo, etc. It is done.

  A hook with a claw is fixed to the outer surface of the rehabilitation trough (the side facing the inner peripheral surface of the aged open channel). The hanging tool is made of a metal rod such as iron, stainless steel, or aluminum, or an elongated plate. One end of the nail lock hanging tool is fixed to the outer surface of the rehabilitation trough, and the other end is a free end away from the outer surface in the length direction of the rehabilitation trough.

  The hook with a claw includes a root part fixed to the rehabilitation trough and a claw part hooked on a receiving tool (described later), and a step is provided between the root part and the claw part. To fix the hanging tool to the outer surface of the rehabilitation trough, the root part is fixed to the outer surface of the rehabilitation trough by the FRP hand layup method. The method of laying up and waterproofing is mentioned, and the direction of the nail | claw part is made to become the length direction of the rehabilitation trough.

  The shape of the claw may be a simple plate shape, but it may be a leaf spring shape where the receiving part is wide so that the latched portion (described later) does not loosen or come off after latching. good.

  At least one hanging tool is provided on the outer surface of the vertical wall on both sides of one rehabilitating trough, and if necessary, it is also provided on the outer surface of the bottom surface. The number to be provided may be increased depending on the size of the rehabilitation trough, but the claws of all the hooks must be provided in the same direction.

  The receptacle is fixed to the inner peripheral surface of the existing open channel at positions corresponding to all of the hanging tools. The receiving device receives the claw portion of the hanging device and latches it. Therefore, the material is not particularly limited as long as it is excellent in strength and corrosion resistance. For example, a U-shaped hanging portion is made of a metal member such as iron, stainless steel, or aluminum, and the U-shaped A method of fixing the end of both legs outward at a right angle to a flange, and fixing the flange to the inner peripheral wall of the existing open channel with anchor bolts, etc., and arranging two anchor bolts side by side on the inner peripheral surface of the existing open channel The anchor bolt is passed through the sleeve, and a metal rod or elongated plate serving as a receiving portion is passed to the upper end of the sleeve and fixed.

  In addition, since the receiving part only needs to receive the claw part of the hanging tool and can exert the latching effect, it does not necessarily need to be a metal, and is made of leather, synthetic resin material, fiber reinforced synthetic resin material, synthetic resin fiber. A woven fabric, a nonwoven fabric, etc. may be sufficient.

  The height of the receiving portion from the inner surface of the existing open channel is determined so that the gap between the outer surface of the rehabilitation trough and the inner surface of the existing open channel becomes the size of the backfill material to be placed. Therefore, each dimension of the vertical surface side and the bottom surface side may be appropriately changed according to the situation and may be different.

  The procedure to fix the rehabilitation trough to the existing open channel is to assemble the rehabilitation trough of unit length and fix the necessary hooks on the outer surface. A receiving tool is fixed at a position corresponding to the above-mentioned hanging tool on the inner peripheral surface of the existing open channel. After that, the rehabilitation trough is temporarily placed in the existing open channel, and the nail of the hanging tool is hooked on the receiving part of the receiving tool while being shifted in the length direction. When the rehabilitation trough is temporarily placed after being hooked, an uncured liquid mortar or the like is placed between the outer surface of the rehabilitation trough and the inner peripheral surface of the existing open channel.

  At this time, the buoyancy is applied and the rehabilitation trough is lifted, but the position of the rehabilitation trough is fixed by the hanger and the receiver, so that the rehabilitation trough is in a predetermined position after the buoyancy is applied by the uncured liquid mortar. Stop and don't move. The gap on the vertical surface side is the same, but if necessary, a spacer may be inserted at the upper end of the gap to finely adjust the interval.

  According to the present invention, the rehabilitating trough is temporarily placed in the existing open channel and is simply slid in the length direction so that the hanging tool and the receiving tool are hooked and the position of the rehabilitating trough is fixed. The rehabilitation trough does not move even when buoyancy is applied by liquid mortar. In addition, since neither the hanging tool nor the receiving tool is fixed, the through hole is not opened in the rehabilitation trough, so that water does not leak.

  Next, embodiments of the present invention will be described with reference to the drawings. Fig. 1 shows a state in which a hook with a claw is provided on the outer surface of a renovated trough made of FRP, a catch is provided on an existing concrete open channel, and the renovated trough is rehabilitated on the inner peripheral surface of the existing open channel. It is an example, (a) is a front view, (b) is a side view. FIG. 2 is a hanging tool fixed to the outer surface of the rehabilitation trough by the FRP hand lay-up method, (a) is a plan view, (b) is a side view, and (c) is a side view of another example of the claw portion. . FIG. 3 is an example of a receiver, (a) is a side view of a U-shaped receiver fixed to an inner peripheral surface of an existing open channel with an anchor bolt, and (b) is between two anchor bolts. The side view of what provided the metal receiving part, (c) is a side view of what the receiving part is a woven fabric of a flexible synthetic resin fiber.

  On the outer surface of the FRP rehabilitation trough 1, a hook 2 with a claw obtained by bending an iron plate is provided. In this example, the rehabilitation trough 1 is provided on the outer side of both vertical surfaces and on the outer side of the bottom surface.

  The hanging tool 2 includes a root portion 21 and a claw portion 22. The root portion 21 is fixed to the outer surface of the rehabilitation trough 1 by FRP 3 by a hand lay-up method, and the nail portion 22 extends along the length direction of the rehabilitation trough 1. Is provided.

  As shown in FIG. 2C, when the gap between the claw portion 22 and the outer surface of the rehabilitation trough 1 is narrowed near the tip of the claw portion 22 and the portion to be inserted into the receiving portion 52 of the receiving device 5 is widened. Since the hook 1 is not loosened or cannot be removed after the hook 1 and the hook 5 are hooked, it may be so.

  On the inner peripheral surface of the existing open channel 4, a U-shaped receiving tool 5 obtained by bending a steel bar at a position corresponding to the hanging tool 2 is fixed. A flat plate is welded and fixed to the leg portion 51 of the receiving tool 5 and is fixed to the inner peripheral surface of the existing open channel 4 by an anchor bolt, and the receiving portion 52 is provided in a direction to receive the claw portion 22 of the hanging tool 2.

  As shown in FIG. 3, the receiving portion 5 is not limited to a U-shaped receiving fixture fixed to the inner peripheral surface of the existing open channel with anchor bolts, but is a metal receiving portion between two anchor bolts. May be provided, or the receiving part may be a woven cloth of a synthetic resin fiber that is flexible.

  The claw portion 22 rehabilitation trough 1 is shifted in the length direction, and the claw portion 22 of the hanging tool 2 is hooked on the receiving portion 52 of the receiving portion 5 to be hooked, and the clearance between the rehabilitation trough 2 and the existing open channel 4 Backing material (uncured liquid mortar) is placed in The rehabilitation trough 1 floats by receiving buoyancy from the mortar that has been laid, and is fixed at a predetermined position by the hook and the hook of the hook.

  Therefore, when the mortar is cured as it is, the rehabilitation of the aging existing open channel inner peripheral surface is completed.

It is an example of a state where a hook with a claw is provided on the outer surface of the renovated trough made of FRP, a receiving device is provided on the existing open channel made of concrete, and the rehabilitated trough is hooked on the inner peripheral surface of the existing open channel and rehabilitated (A) is a side view, (b) is a side view. It is the hanging tool fixed to the outer surface of the rehabilitation trough by the FRP hand layup method, (a) is a plan view, (b) is a side view, and (c) is a side view of another example of the claw portion. It is an example of a receiving device, (a) is a side view of a U-shaped receiving device fixed to an inner peripheral surface of an existing open channel with anchor bolts, and (b) is a metal receiving device between two anchor bolts. The side view of what provided the part, (c) is a side view of what the receiving part is a woven fabric of a flexible synthetic resin fiber.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rehabilitation trough made from FRP 2 Hang 21 Root part 22 Claw part 3 Hand laid-up FRP
4 Existing open channel 5 Receptor 51 Leg 52 Receiving part 6 Backfill material (mortar)

Claims (1)

A hook with a claw is provided along the length direction of the rehabilitation trough on the outer surface of the rehabilitation trough provided on the inner peripheral surface of the open channel, and a receiver for receiving the nail of the hanger is provided on the inner peripheral surface of the open channel. Move the rehabilitation trough in the axial direction along the open channel, hook the hook of the hanger on the receiving device, hook the rehabilitation trough to the inner surface of the open channel, and between the rehabilitation trough and the inner surface of the open channel An open channel rehabilitation method characterized by placing uncured liquid mortar and curing it.

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