JP2019094741A - Repair method of circular water channel and repaired circular water channel - Google Patents

Abstract

To provide a repair method of a circular water channel and the circular water channel repaired by its repair method for repairing in a state of still installing an existing circular water channel without replacing the whole of the circular water channel in repair of the circular water channel of causing a chipped part.SOLUTION: In a repair method of a circular water channel, a concrete layer 10 is provided in a cavity part of becoming an upper part of a synthetic resin pipe 5, by installing and fixing the synthetic resin pipe over between catchment basins provided with every prescribed interval in the longer direction, by inserting the cross-sectional circular long size synthetic resin pipe 5 of a size along a curved surface of a water channel part onto a bottom part of the water channel part from the cavity part, by providing the cavity part by removing an upper part of an existing circular water channel 1 of causing a chipped part over in the longer direction by having a width of at least the water channel part and the depth up to a substantial central position of the water channel part.SELECTED DRAWING: Figure 3

Description

  The present invention is a repair method of a circular water channel for the purpose of repair in a state where an existing circular water channel is installed without replacing the whole circular water channel in the repair of a circular water channel in which a defect occurs. It is related to the circular water channel repaired by the construction method.

  A circular water channel has been installed for the purpose of collecting and draining rainwater from highways etc. since 1955, but many of those that have been 30 years or more after construction are also marked as being deteriorated.

  Mainly due to repeated running load by vehicles and deterioration of concrete etc., defects such as cracks and depressions occur especially around the water outlet which is a weak part that is opened as a drainage channel on the surface side of the circular water channel ing. In addition, various defects such as settlement of ground have occurred.

  As a countermeasure, replace the circular channel with a new circular channel, remove the circular channel part where the defect has occurred, replace only the part with the new circular channel, or reinforce and repair only the surface side where the defect has occurred without replacing it. Is going.

  As described above, in order to replace the circular water channel, it is necessary to destroy and remove the existing circular water channel, and to install a new circular water channel made of precast at the location.

  In addition, in the case of repair of reinforcement only on the surface side without replacing the circular water channel, the main construction is to attach a steel lid made of thick iron plate provided with a drainage port as a water outlet on the surface side where the defect occurs. Met. The attachment of the steel lid is by driving the steel lid by means of an anchor into the concrete layer of the circular channel.

  On the other hand, it is known to attach a steel board to the surface side using the water mouth of a circular channel and the channel under the same as fixing means like patent documents mentioned below.

  In the case of replacing the entire circular water channel, it is necessary to destroy the circular water channel and lift and remove it with a crane, and after laying the ground, require many processes such as installing a new circular water channel. It has to be carried out, and construction at night time with a small amount of traffic is forced, and it was a construction method under severe conditions.

  In addition, repair using reinforcements such as steel lids was temporary such as driving an anchor into an existing circular water channel and attaching it, but it was not a permanent measure. Furthermore, in the case where the whole circular water channel is sinking unevenly, etc., the smooth inclination of the water channel can not be secured, and no drastic repair measures have been taken.

JP 2012-241509 A

  The present invention aims at repairing various defects in a circular channel by repairing an existing circular channel without replacing the entire circular channel.

  The present invention provides a cavity by removing the upper part of the existing circular water channel in which a defect has occurred at least in the width of the water channel and the depth to the approximate center of the water channel in the longitudinal direction to provide a cavity A long synthetic resin pipe of circular cross section having a size along the curved surface of the water channel section is inserted on the bottom of the water channel section, and the synthetic resin pipes are provided at predetermined intervals in the longitudinal direction It is characterized in that the circular water channel is repaired by installing and fixing it, and providing a concrete layer in a hollow portion which is an upper portion of the synthetic resin pipe.

  In addition, the hollow portion has a width in which the upper portion of the existing circular water channel is shifted to the outer surface side of the left and right side walls so as to be larger than the maximum dimension width of the water channel. It features a repair method of a circular water channel, which is approximately the center position and is a portion from which the portion has been removed.

  Furthermore, it is characterized by the repair method of the circular water channel formed by stuffing sand or mortar between the water channel part and the synthetic resin pipe, and fixing both.

  In addition, the concrete layer is characterized by a repair method of a circular channel made of cast-in-place concrete reinforced with reinforcing bars, mesh bars or reinforcing bars.

  Furthermore, the concrete layer is characterized by a retrocast method of a circular channel made of a precast plate of a size that can be inserted into the cavity.

  In addition, it is characterized by a repair method of a circular water channel formed by installing a temporary cover with a precast flange with a temporary cover with a precast flange or a temporary cover with a striped steel plate across the upper end of the left and right side walls on the upper surface of the concrete layer.

  Furthermore, a groove is provided in the upper surface portion of the concrete layer, and a repair method of a circular water channel which becomes a drainage channel of rain water from the road is featured.

  In addition, it is characterized by a repair method of a circular water channel formed by providing a drainage port in the vertical direction communicating with the synthetic resin pipe in the drainage channel.

  Furthermore, a long synthetic resin pipe having a cross-sectional shape of a size along the curved surface of the water channel is provided between the water collection basins on the bottom of the water channel where the upper portion of the existing circular water channel is removed. A circular water channel is formed by covering the upper part of the synthetic resin pipe with a drainage channel of rainwater from the road and a concrete layer provided with a drainage port communicating with notches of the synthetic resin pipe provided at predetermined intervals in the drainage channel. It features.

  In the repair of the circular channel where the defect has occurred, without replacing the circular channel, only the upper part of the existing circular channel where the defect has occurred is cut and removed, and the component and the channel part are repaired by repair As a result, the construction period can be shortened and the vehicle traffic can be opened early.

  By cutting the concrete in the vertical direction from the upper side with the cutter only in the upper part of the section of the circular water channel where the defect occurred, the defective part can be removed, and after the removal, the work of the relevant part can be performed from the upper side As it was possible, repair work became easy.

  In addition, since only the upper part of the section in which the defect occurs is removed while leaving the existing circular water channel, it is possible to carry out an environment-friendly construction with less waste.

(A) Sectional drawing of the circular water channel which shows the cutting position of the existing part which defect generate | occur | produced, (b) It is sectional drawing which cut-removed one part of the existing part and fixed the synthetic resin pipe to the water channel part by inserting. (A) The perspective view of the water collection collar part used as the connection part of a synthetic resin pipe | tube, (b) The front view of the connection part. (A) A perspective view showing a concrete layer of a hollow portion, (b) a perspective view of a reinforcing member of the concrete layer, (c) a perspective view of a concrete layer made of a precast member. Sectional drawing which shows the construction method in case the existing circular channel is sinking. (A) The perspective view which shows the drainage port position provided in the concrete layer, (b) Sectional drawing of the circular water channel of the same position. Sectional drawing which shows the several aspect of (a), (b), (c) drainage. (A) A cross-sectional view of another embodiment showing the cutting position of the existing part of the circular channel, (b) cutting and removing a part of the existing part, and removing the synthetic resin pipe and concrete layer in the removed cavity and channel Sectional view provided. (A) Sectional drawing of another Example which provided the temporary lid in the upper part of the concrete layer of the renovated circular channel, (b) The perspective view of a temporary lid. Sectional drawing which mounted the precast new drainage channel version in the upper part of the concrete layer.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

  The circular water channel 1 installed as a means for collecting and draining rainwater on the road becomes a weak portion of the circular water channel 1 particularly due to the defect portion A due to repeated running load by vehicles for many years or deterioration of concrete. It is concentrated on the surface side, such as around the water outlet 2 where it is produced.

  The water outlet 2 is located above the water channel portion 3 and forms an opening for draining rainwater to the water channel portion 3 and the upper portion of the water channel portion 3 is cantilevered from the left and right side walls. It has a shape that protrudes as a beam, and since the inside is hollow, it is a location that is easily broken.

  Conventionally, in the repair of the relevant part, as described above, the repair or reinforcement of only the relevant part has been dealt with, but the repair method is not permanent but only provisional, and a short period of time There was a possibility that the defect at the relevant site would recur.

  FIG. 1 (a) shows a cross-sectional view of the circular water channel 1 in which the defect portion A is formed in the short direction, including the periphery of the water outlet 2 in which the defect portion is generated. As shown, the concrete cuts the concrete with a width corresponding to the diameter of the water channel 3 to a depth from the upper side in the longitudinal direction to the center position of the water channel 3.

  By the above-described cutting, as shown in FIG. 1B, the hollow portion 4 extending in the longitudinal direction of the U-shaped cross section is formed in the upper part of the circular water channel 1. At the bottom of the hollow portion 4, a reinforced synthetic resin pipe 5 such as FRP having a diameter slightly smaller than the diameter of the water passage portion 3 is disposed. For example, when the diameter of the water passage 3 is 300 mmφ, the synthetic resin tube 5 uses about 250 mmφ. The thickness is preferably about 6 to 9 mm.

  As shown in FIGS. 2A and 2B, the synthetic resin pipe 5 is a pipe extending in the longitudinal direction between the water collecting ridges 6. Since the water collecting ridge portion 6 is to be installed at predetermined intervals, the upper part of the water channel portion 3 between the water collecting ridge portions 6 including the location where the defect has occurred is removed when the circular water channel 1 is repaired. The portion is cut and removed in the longitudinal direction with a width that is the maximum diameter of the water channel portion 3, and the portion is taken as a connection portion of the synthetic resin pipe 5. If there is no defect on the front side, the point is taken as the end of the repair.

  As shown in FIG. 2 (b), the water collecting weir 6 is provided with openings at the top and bottom made of a material such as FRP so that rainwater can be collected and introduced into the synthetic resin pipe 5. I have to. The water collecting weir 6 is provided, for example, every 10 m in which the high-pressure washing can be performed in the reworking area of the circular water channel 1. The length in the longitudinal direction of the water collecting weir 6 can be appropriately set to a length, for example, 300 to 400 mm. In the water collecting collar 6, a socket pipe 7 for connecting the synthetic resin pipes 5 to each other is used, and the synthetic resin pipes 5 are fitted and connected at the relevant portions. The synthetic resin pipe 5 and the socket pipe 7, and the water collecting collar 6 and the socket pipe 7 are integrally fixed by an adhesive or the like.

  A lid 8 with a rainwater passing function such as a grating is installed at the opening that is the upper part 6 of the water collection ridge 6 so as to be flush with the top end of the circular water channel 1, and the rainwater on the road is synthesized It can be introduced into the resin pipe 5.

  On the other hand, the existing dam portion can be treated by passing the synthetic resin pipe 5 through the inside which becomes the water channel portion and burying the upper side.

  The synthetic resin pipe 5 is used to pack and fix the intercalated material 9 made of a material such as water or mortar in the space formed with the existing water channel 3.

  As shown in FIG. 3A, a concrete layer 10 is formed in the upper hollow portion 4 after the synthetic resin pipe 5 is installed in the water channel portion 3 and the intercalated material 9 is filled. When concrete is cast as the concrete layer 10, in order to maintain the strength of the hollow upper part, as shown in FIG. 3 (b), reinforcing members 11 such as reinforcing bars, mesh bars, reinforcing bars, etc. Concrete layer 10 shown in FIG. 3 (c) which can achieve the role equivalent to the beam of the construction so that the synthetic resin pipe 5 is not loaded with a pressure such as a traveling load of the vehicle from above. I assume.

  In addition, when it is formed in advance as a precast member in a factory etc. and it is used as the concrete layer 10, it is inserted into the upper part of the hollow portion 4 and adhesive strength is given to be integrated with the circular water channel 1 by mortar etc. Make it

  In order to strengthen the mutual adhesion between the hollow portion 4 of the circular water channel 1 and the concrete layer 10 to be newly formed, the adhesion layer 12 having an adhesive force is provided to improve the integration between the two. It can be made to be a thing.

  Further, as shown in FIG. 4, when the whole of the circular water channel 1 is sunk, on the bottom side to be the water channel portion 3, the insert 9 is thickly laid with a thickness corresponding to the sunk dimension H The height of the water channel portion 3 can be adjusted by installing the synthetic resin pipe 5. In addition, the concrete layer 10 is a raised portion 14 having a height H on which the upper edge portions of the concrete layer 10 ride on the top ends 13 of the left and right side walls of the circular water channel 1. Therefore, the raised height H corresponds to the thickness dimension corresponding to the sinking. Thus, it is possible to form a water channel which is increased in size corresponding to the settlement. Even in the top end portion 13 having a waveform in the vertical direction due to uneven settlement, the height adjustment corresponding to the settlement dimension H of the portion can be performed. Furthermore, it is possible to reinforce the bulking portion 14 via reinforcement bars 15 such as mesh bars so as to straddle the top end 13 sides of the left and right side walls.

  The above-mentioned concrete layer 10 blocks the conventionally continuous water outlet in the longitudinal direction. Therefore, in order to discharge rainwater from the road, the water collecting ridge portion 6 shown in FIG. In addition, as shown in FIG. 5 (a), a drain port 16 serving as a water outlet is formed at predetermined intervals in the longitudinal direction of the concrete layer 10. The drainage port 16 is formed by attaching a pipe conforming to the shape of the drainage port 16 in advance to the synthetic resin pipe 5 and placing concrete, or a method of making a hole with a core cutter after hardening the concrete, etc. It can be adopted.

  As shown in FIGS. 5 (a) and 5 (b), a groove-like drainage channel 17 formed continuously in the longitudinal direction on the surface side of the concrete layer 10 is provided as a channel for guiding rainwater to the drainage port 16. Further, by connecting the drainage port 16 and the notch 18 of the synthetic resin pipe 5, rain water from the road flows from the drainage port 16 to the synthetic resin pipe 5.

  The drainage channel 17 has various cross sectional shapes such as the one having a curved cross section 17a shown in FIG. 6 (a), the one having a cross section grooved shape 17b shown in (b), the one having a small grooved cross section 17c shown in (c). Can be adopted.

  In addition, the surface side of the concrete layer 10 is suppressed lower than the height of the upper end of the left and right side wall portions of the circular water channel 1 to form a stepped portion in advance, and a drainage port 16 having a thickness corresponding to the stepped portion is formed. It is possible to adopt a method of fitting the precast concrete plate into the step portion.

  When the concrete layer 10 is formed on the synthetic resin pipe 5 placed in the hollow portion 4 as in the first embodiment, a load may be generated on the synthetic resin pipe 5 from the upper side. Then, as shown to Fig.7 (a), the cavity part 4 is formed by the dimension width W which becomes larger than the diameter of the water channel part 3. As shown in FIG. The hollow portion 4 has a cut portion (shown by a dotted line) shifted to the outer surface side of the left and right side walls, and is cut to the central position of the water channel portion 3 in the vertical direction. It can be formed as a thing of wide width size by turning inward and each becoming the water outlet 2 like this.

  For example, as shown in FIG. 7 (b), by cutting the left and right side walls as thick as about 30 mm, the thickly cut portions become the cut upper surface portions 19 on the left and right side walls to be the portions on which the concrete layer 10 is placed. it can. As a result, the pressure P such as the traveling load of the vehicle acting on the concrete layer 10 can be shared by the circular water channel 1 through the cutting upper surface portion 19.

  In the case of a construction method in which concrete is cast to form the concrete layer 10 after the synthetic resin pipe 5 is installed in the hollow portion 4 as shown in the above-mentioned first and second embodiments, until the concrete hardens. At that point, the vehicle can not travel. The construction site of the construction is required to open the traffic as soon as possible, and this embodiment is a construction method therefor.

  As shown to Fig.8 (a), the position of the upper surface part of casting of the concrete layer 10 to the hollow part 4 is pressed lower than the height of a right-and-left side wall part, and the level | step-difference part 20 is formed. A T-shaped temporary cover 21 shown in FIG. 8B is placed on the step portion 20. The convex portion 22 on the back surface side of the temporary lid 21 is fitted into the concave portion to be the step portion 20 of the concrete layer 10, and the flange portions 23 on the left and right edge portions are mounted on the upper end portions 24 of the left and right side wall portions of the circular water channel 1 Will be installed.

  The temporary cover 21 is reinforced with reinforcing bars and the like, and is a precast concrete plate reinforced by providing reinforcing members 25 such as angle members at the left and right ends, and is supported by the upper end 24 of the side wall to make the concrete layer before hardening It is possible to obtain a strength that can cope with the opening of the vehicle without applying pressure from above to 10. Further, in the case of a precast concrete plate, since it is necessary to embed a reinforcing material such as a reinforcing bar, the member becomes thick, and therefore, it is possible to use a temporary cover 21 made of striped steel plate in which the lower surface is reinforced with an angle material or the like.

  As in the above embodiment, by providing the drainage ports 26 in advance at predetermined intervals in the longitudinal direction of the temporary cover 21, it is possible to discharge rain water from the road.

  After hardening of the concrete layer 10, the temporary cover 21 is removed, and as shown in FIG. 9, the precast new drainage channel plate 28 provided with the drainage port 27 at the relevant position has upper surfaces which are upper end portions of left and right side wall portions. Set up to be flush with 24. The newly installed drainage channel plate 28 can introduce rainwater on the road to the synthetic resin pipe 5 by adopting drainage channels and drainage ports of various shapes shown in FIG. 7.

Reference Signs List 1 circular water channel 2 water outlet 3 water channel portion 4 hollow portion 5 synthetic resin pipe 6 water collecting portion 7 socket tube 8 lid portion 9 interlaying material 10 concrete layer 11 reinforcing member 12 adhesion layer 13 top end portion 14 raised portion 15 reinforcing bar 16, 26, 27 Drainage port 17 Drainage channel 18 Notched part 19 Cut upper surface part 20 Stepped part 21 Temporary cover 22 Convex part 23 Ridge part 24 Upper end part of left and right side wall parts 25 Reinforcement member 28 New drainage path plate

Claims (9)

  The upper part of the existing circular water channel where the defect has occurred is removed along the longitudinal direction with at least the width of the water channel and the depth to the approximate center of the water channel to form a cavity, and Insert a long synthetic resin tube of circular cross-sectional size along the curved surface of the water channel into the bottom and install and fix the synthetic resin tube over the space between water collecting rods provided at predetermined intervals in the longitudinal direction A concrete channel is provided in a hollow portion which is an upper portion of the synthetic resin pipe.   The hollow portion has a width in which the upper portion of the existing circular water channel is shifted to the outer surface side of the left and right side walls so as to be larger than the maximum dimension width of the water channel portion. The method according to claim 1, wherein the portion is up to the position and the portion is removed.   3. A method of repairing a circular water channel according to claim 1, wherein sand or mortar is filled between the water channel portion and the synthetic resin pipe and both are fixed.   The repair method for a circular water channel according to any one of claims 1 to 3, wherein the concrete layer is a cast-in-place concrete reinforced by reinforcing bars, mesh bars or reinforcing bars.   The method for repairing a circular water channel according to any one of claims 1 to 3, wherein the concrete layer is a precast plate of a size that can be inserted into the hollow portion.   The circular channel according to claim 4 or 5, wherein a temporary cover with a precast brim or a temporary cover made of striped steel plate is installed across the upper end of the left and right side walls on the upper surface of the concrete layer. Renovation method.   The method according to any one of claims 1 to 6, wherein the upper surface portion of the concrete layer is provided with a groove to serve as a drainage channel of rainwater from the road.   8. A method according to claim 7, wherein the drainage channel is provided with a longitudinal drainage port communicating with the synthetic resin pipe.   A long synthetic resin pipe having a cross-sectional shape of a size along the curved surface of the water channel is provided on the bottom of the water channel from which the upper portion of the existing circular water channel is removed. The upper portion of the pipe is covered with a drainage path for rainwater from the road and a concrete layer provided with a drainage port communicating with the cutout portion of the synthetic resin pipe provided at predetermined intervals in the drainage path. Renovated circular channel.

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