JP2007177433A - Portal precast concrete drain structure, drain system using the portal precast concrete drain structure and portal member used for precast concrete drain structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portal precast concrete drain structure, a drain system using the portal precast concrete drain structure and a portal member used for the portal precast concrete drain structure, superior in construction workability, and capable of efficiently recovering and draining sediment. <P>SOLUTION: Arm parts 16c and 16c having a pair of steps parts 16d and 16d on the upper surface side, respectively, are and integrally projected outward from respective outside surfaces of both right-left leg members 16 and 16 of the portal member 13, respectively. A position in the height direction of the upper surface of these steps 16d is positioned downward by the thickness of a paving precast concrete plate material 15 from the upper surface 14 of the portal member 13. FRP plate materials 20, etc. as a resin reinforced plate material are stuck to inside surfaces 16e and 16e of both right and left legs 16 and 16 on the lower side of the steps 16d by facing a water communication passage space 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is mainly a gate-type precast concrete drainage structure which is provided on a ground surface to which a large unbalanced load is applied, such as an airport parking lot, and obtains a desired drainage efficiency, and a drainage using this gate-type precast concrete drainage structure. The present invention relates to a system and a portal member.

  Conventionally, the precast concrete drainage structure as shown in FIG. 16 and the drainage system using this precast concrete drainage structure are known (for example, refer patent document 1 etc.).

  First, from the configuration, in this conventional precast concrete drainage structure, a plurality of U-shaped side groove members 1... Precast are laid on a foundation 2 preliminarily constructed while providing a drainage gradient. .

  The U-shaped side groove member 1 is provided with standing left and right side walls 1a and 1a integrally extending substantially vertically upward from the left and right edges of the bottom surface 1b.

  On the outer side surfaces of the left and right side wall portions 1a and 1a, steps 3 and 3 constituting a stepped portion are provided with a fixed dimension so as to be integrally provided.

  In addition, on the upper surface of each of these steps 3 and 3, adjustment concrete is placed to form the steps 4 and 4.

  Then, by placing the left and right leg portions 5a, 5a of the cover member 5 covering the side groove internal space 8, the level in the height direction of the upper surface portion 5b of the cover member 5 is adjusted. It is configured.

  Next, the operation of this conventional precast concrete drainage structure will be described.

  In the conventional precast concrete drainage structure configured as described above, when rainwater flows into the upper surface portion 5b of the cover member 5 from the upper surface of the pavement surface 6 of the adjacent road, it is formed on a part of the upper surface portion 5b. The rainwater flows down from the grating opening 7 thus made into the side groove inner space 8.

The rainwater that has flowed into the groove inner space 8 extends the drainage grooves formed by the U-shaped side groove members 1 due to the drainage gradient provided on the bottom surface portions 1b of the U-shaped side groove members 1. It is drained by flowing in a certain direction along the direction.
JP 2001-123519 A (paragraphs 0005 to 0012, FIG. 2)

  In the U-shaped side gutter member 1 made of the conventional precast concrete configured as described above, when used in an airport parking lot, as shown in FIG. 17, on the upper surfaces of the steps 3 and 3 on both side walls 1a and 1a, In some cases, the end portions 9a and 9a of the pavement precast concrete plates 9 and 9 made of proof strength precast concrete are locked and supported.

  In such a case, for example, when the aircraft wheel T is positioned on the upper surface of either the left or right pavement precast concrete plate material 9, a large unbalanced load F is applied to one side wall portion 1a of the U-shaped side groove member 1. Join.

  For this reason, if the thickness W of the side wall portion 1a is not set to a predetermined thickness or more so as not to be crushed or buckled even if this large offset load F is applied, the large offset load cannot be supported. There has been a problem that the amount of precast concrete used increases and the manufacturing cost may increase, and the weight also increases.

  In a parking lot at an airport or the like, a predetermined level is required on the upper surface of the pavement precast concrete plate material 9.

  For this reason, in the U-shaped side groove member 1 laid on the foundation 2 provided with the drainage gradient, the adjustment concrete is placed on the upper surface of each of the steps 3 and 3, and the height differs in the longitudinal direction. By forming the inclined steps 4 and 4, the level of the pavement precast concrete plate material 9 must be maintained.

  Further, in the conventional U-shaped side groove member 1, the height direction dimension h from the upper surface of the step 3 to the lower surface 1c of the bottom surface portion 1b is determined by a certain standard.

  For this reason, even if a plurality of U-shaped side groove members 1 and 1 having different height direction dimensions h are prepared, it is difficult to give a desired gradient in a laying place having a long linear distance such as an airport or a wharf. There was also a problem.

  Therefore, the present invention is lightweight, has good workability, and can efficiently drain the gate-type precast concrete drainage structure, the drainage system using the gate-type precast concrete drainage structure, and the gate used for the gate-type precast concrete drainage structure. It is an object to provide a mold member.

  In order to achieve the above object, the invention described in claim 1 is provided with an upper surface portion having a bridge-like portion for connecting upper edges of the left and right leg portions so as to be integrated, A precast concrete drainage structure in which a drainage channel is formed below the surface of the ground by connecting a plurality of precast concrete gate-shaped members that form a water passage space between the right and left leg portions. A pair of stepped portions projecting integrally from the side portions toward the outside, and the paved precast concrete plate material that is substantially flush with the upper surface portion of the portal member is locked on the upper surface of the stepped portion. It features precast concrete drainage structure.

  Further, according to a second aspect of the present invention, the portal member faces a water passage space formed between the left and right leg members, and a resin reinforcing plate is provided on the inner surface of the leg member. The precast concrete drainage structure according to claim 1, wherein the precast concrete drainage structure is attached.

  Further, according to a third aspect of the present invention, the gate-shaped member is formed so that a grating opening portion for mounting a grating member is formed on the upper surface portion so as to communicate the water passage space and the external space. The precast concrete drainage structure according to claim 1 or 2, wherein

  According to a fourth aspect of the present invention, the gate-shaped member is a pavement precast concrete plate having a certain thickness in advance from the upper surface portion having the bridge-shaped portion to the upper surface of the stepped portion. The precast concrete drainage structure according to any one of claims 1 to 3, which is set together.

  And, according to the fifth aspect of the present invention, a stepped foundation formed in a stepped shape is provided on the bottom surface of the recessed groove portion formed to be recessed from the ground surface, with different dimensions in the height direction. In accordance with the height dimension of the upper surface of each stepped portion of the stepped foundation, the left side formed with different height dimensions so that the upper surface of each portal member is flush , By installing a plurality of the gate-shaped members having both right leg portions on the upper surface of each stepped portion, the height direction position of the upper surface portion of the gate-shaped member is matched with the height direction position of the ground surface. A drainage using the precast concrete drainage structure according to any one of claims 1 to 4, wherein an upper surface portion of the pavement precast concrete plate material locked to the step portion is provided substantially horizontally on the ground surface together with the upper surface portion of the gate-shaped member. Features the system.

  Further, according to a sixth aspect of the present invention, the base upper surface portion located between the left and right leg members has a predetermined slope and allows water to flow down in one direction of the water passage. A drainage system using the precast concrete drainage structure according to claim 1, which forms a running water inclined surface.

  Further, according to a seventh aspect of the present invention, there is provided a drainage system using the precast concrete drainage structure according to the sixth aspect, wherein the flowing water inclined surface is formed by placing invert adjusting concrete on the upper surface of the foundation. It is characterized by.

  And what was described in Claim 8 is a precast concrete formation beforehand, and is arrange | positioned adjacent to the upper surface part of a foundation, The drainage channel which connected each said water flow path space below the ground surface is provided. The gate-type member used for the precast concrete drainage structure of Claim 1 thru | or 4 to form is characterized.

  According to the first aspect of the present invention configured as described above, the left and right leg members, which are connected so that the upper edges are integrated with each other by a bridge-shaped portion, project integrally from the side portions toward the outside. The pavement precast concrete board material is latched by each of a pair of formed step parts, and is supported from the lower part.

  For this reason, even if a large offset load is input to the one step portion from the pavement precast concrete plate material, the load is distributed to the leg member where the opposite step portion is formed via the bridge-shaped portion. The load is supported by the left and right legs.

  Therefore, since the thickness direction dimension of the left and right leg portions can be set small, the amount of precast concrete used can be reduced, and an increase in manufacturing cost can be suppressed.

  Moreover, since the increase in weight can also be suppressed, workability can be improved.

  And the upper surface of the said pavement precast concrete board | plate material becomes substantially flush with the upper surface part of the said gate-shaped member.

  For this reason, the said pavement precast concrete board | plate can be horizontally arrange | positioned easily only by mounting the said gate-shaped member on the upper surface of a horizontal foundation.

  Therefore, the workability is further good.

  Further, according to the second aspect of the present invention, the surface on the side of the water passage space that comes into contact with water is smoothed by the resin-made reinforcing plate material attached to the inner side surface portions of the left and right leg portions of the gate-shaped member. Covered with a new resin material, the resistance to water flow is reduced.

  For example, it is known that the roughness coefficient of concrete is 0.013 to 0.014, whereas the roughness coefficient of FRP resin material as a resin reinforcing plate is about 0.01. .

  For this reason, it is possible to reduce the width-direction dimension between the left and right leg members required to obtain a desired amount of water flow, and a material such as invert adjusting concrete placed between the left and right leg members. Therefore, the increase in construction cost can be suppressed.

  Moreover, the said resin reinforcement board | plate material can exhibit favorable abrasion resistance by using for the part which faces the water passage space where water passage is performed over a long period of time with a low deterioration rate.

  For example, when the concrete material is exposed on the surface on the side of the water passage space in contact with water, unevenness is generated on the surface due to wear, and the water resistance increases due to the rough surface. There is no fear.

  For this reason, the surface on the water passage space side is covered with the smooth resin material of the resin reinforced plate material, so that a smooth state can be maintained over a long period of time, and the desired flow rate can be maintained without changing the water passage resistance. Can be maintained.

  Therefore, since the maintenance interval can be lengthened, it is suitable for use as a drainage structure for facilities that require weather resistance and continuity such as airports and harbor facilities.

  Further, according to a third aspect of the present invention, the rainwater is formed in the upper surface portion of the gate-shaped member through the grating opening that communicates the water passage space with the external space. To be flowed down.

  With the grating opening, the amount of precast concrete used can be reduced on the upper surface portion to suppress an increase in manufacturing cost.

  Moreover, since weight reduction can be achieved, workability is further favorable.

  According to a fourth aspect of the present invention, the dimension from the upper surface portion having the bridge-shaped portion of the gate-shaped member to the upper surface of the stepped portion is matched with a pavement precast concrete plate material having a certain thickness in advance. Is set.

  For this reason, the upper surface of the paved precast concrete plate and the upper surface of the gate-shaped member are obtained by locking the end of the paved precast concrete plate to the upper surface of the stepped portion and supporting it from below. It can be substantially flush.

  Therefore, conventional adjustment concrete becomes unnecessary.

  According to the fifth aspect of the present invention, the upper surface portion of the paved precast concrete plate material is grounded together with the upper surface portion of the gate-shaped member by engaging the upper surface portion of the paved precast concrete plate material with the stepped portion. Provided substantially horizontally on the surface.

  For this reason, the upper surface of the pavement precast concrete plate and the upper surface portion of the portal member can be arranged horizontally.

  Therefore, conventional adjustment concrete and leveling are unnecessary, and the workability is further improved.

  Further, in the present invention, the running water inclined surface formed on the upper surface of the foundation located between the left and right leg members has a predetermined gradient.

  For this reason, water can be flowed down toward one direction of a water passage.

  Since the flowing water inclined surface can be easily formed on the upper surface of the foundation without affecting the level of the precast concrete plate material, the workability is further improved.

  According to a seventh aspect of the present invention, the running water inclined surface is formed by placing invert adjusting concrete on the foundation upper surface portion.

  For this reason, construction is easier.

  And what was described in Claim 8 makes the said each water channel space communicate below a ground surface by the gate-shaped member in which the precast concrete was previously formed being arrange | positioned adjacent to the upper surface part of a foundation. A drainage channel is formed.

  This portal-type member is lightweight, has good construction workability, can drain efficiently, and can lengthen maintenance intervals, so facilities that require weather resistance and continuity such as airports and harbor facilities are required. It is suitable for use as a drainage structure and drainage system.

  Next, based on the drawings, the gate-type precast concrete drainage structure, the drainage system using the gate-type precast concrete drainage structure, and the gate-type precast concrete drainage structure of the best mode for carrying out the present invention are used. The portal member will be described.

  1 to 9 show a gate-type precast concrete drainage structure, a drainage system using the gate-type precast concrete drainage structure, and a gate-type member used for the gate-type precast concrete drainage structure according to the best embodiment of the present invention. Is.

  First, from the configuration, in the drainage system using the portal precast concrete drainage structure of this embodiment, it is provided in the parking lot 11 of the airport 10 as shown in FIG. A gate-shaped member 13 made of a portal-type precast concrete provided in the recessed groove portion 12 formed in a recessed manner, a top surface portion 14 of the gate-shaped member 13, and a plurality of pavement precast concrete plates 15 having a substantially flush upper surface. Are mainly configured.

  As shown in FIG. 4, the portal member 13 is arranged substantially horizontally on the upper surface portion 14 so that the upper edges 16a, 16a of the pair of left and right leg portions 16, 16 are integrated. The bridges 14a and 14a are connected to each other.

  A water passage space 18 is formed between the left and right leg portions 16 and 16, and a plurality of the gate members 13 made of precast concrete are continuously provided as shown in FIG. A drainage channel 19 is formed under G.

  A grating opening 14b for mounting the metal grating member 17 is formed between the bridge-like portions 14a and 14a of the upper surface portion 14 so as to communicate the water passage space 18 and the upper external space. Yes.

  And the upper surface part of the said metal grating member 17 is made to latch the peripheral part of the said metal grating member 17 on the grating latching step parts 14c and 14c formed in the inner periphery of this grating opening part 14b. The bridge-like portions 14a and 14a are configured to be substantially flush with the upper surface portion.

  Further, the pavement precast concrete plate 15 is configured to have a substantially rectangular shape in a top view, and as shown in FIG. 1, connecting portions 15 a, 15 a. A plurality of the pavement precast concrete plate members 15 arranged adjacent to each other are connected to the connecting portions 15a, 15a,.

  1 to 9 show a gate-type precast concrete drainage structure of Example 1 of this embodiment, a drainage system using the gate-type precast concrete drainage structure, and a gate-type member used for the gate-type precast drainage concrete structure. Is.

  First, in terms of configuration, in the first embodiment, as shown in FIG. 6, the arm portions 16 c and 16 c are directed outward from the outer surface portions of the left and right leg portions 16 and 16 of the portal member 13. , Each projecting integrally. A pair of stepped portions 16d and 16d are formed on the upper surface portions of the arm portions 16c and 16c, respectively.

  The height direction position of the upper surface of the step portion 16d is set so as to be positioned below the upper surface portion 14 by the thickness of the pavement precast concrete plate material 15.

  That is, as shown in FIG. 1 or FIG. 6, the gate-shaped member 13 has a predetermined thickness from the upper surface portion 14 having the bridge portions 14a and 14a to the upper surfaces of the step portions 16d and 16d. The pavement precast concrete plate material 15 precast so as to have a thickness is set in accordance with the plate thickness.

  For this reason, if the edge parts 15b and 15b of the pavement precast concrete board | plate materials 15 and 15 are each latched by the upper surface of this step part 16d, the upper surface part and the upper surface part of this portal type member 13 will become substantially flush | planar. So that it is set.

  Further, in the first embodiment, the left and right leg portions 16 and 16 positioned above and below the step portion 16d are configured to have substantially the same thickness direction dimension.

  Among these, the inner side surface portions 16e and 16e of the left and right leg portions 16 and 16 positioned below the step portion 16d face the water passage space 18 formed between the left and right leg portions 16 and 16, respectively. Then, a plurality of FRP plate materials 20 as a resin-made reinforcing plate material are pasted.

  As shown in FIG. 7, the FRP plate material 20 of Example 1 has a substantially rectangular plate shape that is vertically long when viewed from the front.

  In addition, as shown in FIGS. 8 and 9, each FRP plate material 20 of the first embodiment has a plurality of anchor protrusions 21 and 21 integrally formed on the back surface side, and the portal member 13 is precast. By being embedded at the time of molding, the FRP plate material 20 is formed so as not to easily peel off.

  Further, on both left and right side edge portions of each FRP plate material 20 of the first embodiment, connection flange portions 22 and 22 are formed substantially vertically from the back surface side in a substantially L-shaped cross section, and are arranged adjacent to each other. The bolt member 23 and the nut member 24 are used and fastened with the connecting flange portion 22 of the other FRP plate member 20 so as to face and be fixed in a state of being arranged in parallel in the water passage space 18. Has been.

  The FRP plate member 20 facing the water passage space 18 formed between the left and right leg portions 16 and 16 is compared with a case where the concrete inner side surface portions 16e and 16e are exposed in the water passage space 18. The surface is configured to be smoothly covered with a resin having low resistance to water so that the water flow resistance can be reduced.

  Next, the operation effect of the portal type precast concrete drainage structure of this Example 1, the drainage system using the portal type precast concrete drainage structure, and the portal type member used for the portal type precast concrete drainage structure is explained.

  First, a description will be given in accordance with the construction sequence of the drainage system using the portal precast concrete drainage structure. In the first embodiment, as shown in FIG. 1 or FIG. While forming, the foundation 100 is constructed in a staircase shape with different dimensions in the height direction on the bottom surface of the concave groove portion 12.

  The step-like foundation 100 of the first embodiment is mainly constituted by a lower foundation 101 constituted by gravel and a concrete foundation 102 in which a plurality of reinforcing bars 103 are embedded.

  And in the drainage system using the portal type precast concrete drainage structure of Example 1, as shown in FIG. 3, the concrete foundation 102 has a plurality of horizontal steps on which a plurality of portal members 13 are placed. , Are provided continuously.

  In FIG. 3, for the sake of easy understanding, the number of the gate-shaped members 13 placed on one horizontal step portion is reduced and the gradient of the drainage channel 19 is increased. Is set to be 0.1 to 3%, preferably 0.5 to 1%.

  Next, the portal-type member 13 that has been precast-molded with the FRP plate material 20 pasted on the inner side surface portions 16e and 16e of the left and right leg portions 16 and 16 is shown in FIG. As shown by the chain line, several types of left and right leg portions 16 and 16 are prepared with different lengthwise dimensions.

  Then, in correspondence with the height dimension of the upper surface portion of each horizontal step portion of the concrete foundation 102 having the stepped shape, the upper surface portion 14 of each of the gate-shaped members 13 is flush with each other. The gate-shaped members 13 are installed on the upper surface of each horizontal step portion.

  In this way, by installing a plurality of gate-shaped members 13 having left and right leg portions 16 and 16 formed with different height direction dimensions on each horizontal step portion, as shown in FIG. The height direction position of the upper surface portion 14 of the gate-shaped member 13 can be matched with the height direction position of the ground surface G.

  Next, as shown in FIG. 1, a pair of upper surfaces of the arm portions 16 c and 16 c are integrally projected from the outer surface portions 16 b and 16 b of the left and right leg portions 16 and 16 of the gate-shaped member 13. The end portions 15b and 15b of the precast concrete plate material 15 that has been precast and molded in advance are respectively engaged with the step portions 16d and 16d.

  By this locking, the upper surface portion of the pavement precast concrete plate 15 is provided substantially horizontally with the upper surface portion 14 of the gate-shaped member 13 on the ground surface G leaving a slight gradient such as a drainage gradient. The upper surface of the pavement precast concrete plate 15 is substantially flush with the upper surface 14 of the portal member 13.

  Therefore, when the placement of each horizontal step portion of the concrete foundation 102 is completed, the portal member 13... And the pavement precast concrete plate material 15. There is no need for adjusting concrete or leveling, and the pavement precast concrete plate 15 can be easily placed horizontally.

  In the gate-shaped member 13, the upper side edges are directed outward from the outer side surface portions 16b, 16b of the left and right leg portions 16, 16 connected so as to be united by the bridge-like portions 14a, 14a. The end portions 15b of the pavement precast concrete plate 15 are locked to and supported from below by the step portions 16d and 16d of the pair of arm portions 16c and 16c that are integrally projected.

  For this reason, even if a large unbalanced load is input from the pavement precast concrete plate material 15 to the step portion 16d protruding from one leg member 16 of the left and right leg portions 16, 16 of the portal member 13. The load is also distributed to the leg 16 where the opposite step 16d is formed via the bridge-like parts 14a, 14a, and the left and right legs 16, 16 are in good balance. This load is supported.

  Therefore, compared with the case where the load is concentrated on one side wall portion, the thickness direction dimensions of these left and right leg portions 16 and 16 can be set smaller, so that the amount of precast concrete used can be reduced. , Increase in manufacturing cost can be suppressed.

  Moreover, since the increase in weight can also be suppressed, workability can be improved.

  Furthermore, in the first embodiment, the FRP plate material 20 attached to face the water passage space 18 formed between the left and right leg portions 16 and 16 is integrated with the left and right leg portions 16 and 16. Thus, a certain strength can be obtained. For this reason, the thickness direction dimension of these left and right leg parts 16 and 16 can further be set small.

  For example, when several types of precast-molded gate-shaped members 13 are prepared with different length-wise dimensions of the left and right leg portions 16 and 16 as shown by two-dot chain lines in FIG. It is possible to suppress an increase in weight accompanying an increase in the lengthwise dimension of both legs 16 and 16.

  Further, in the first embodiment, an invert adjusting concrete 31 is placed on the upper surface of the concrete foundation 102 located between the left and right leg members 16 and 16, and has a predetermined gradient, and a water passage. The flowing water inclined surface 30 is formed to allow water to flow down in one direction.

  In the first embodiment, the gradient amount of the flowing water inclined surface 30 is set to be a gradient amount of 0.5 to 1% over substantially the entire area.

  Further, the surface on the side of the water passage space 18 in contact with water is smooth by the FRP plate member 20 attached to the inner side surface portions 16d, 16d of the left and right leg portions 16, 16 of the gate-shaped member 13. Covered with material, water resistance is reduced.

  For example, it is known that the roughness coefficient of concrete is 0.013 to 0.014, whereas the roughness coefficient of FRP resin material is about 0.01.

  For this reason, the width direction dimension between the left and right leg members 16, 16 required to obtain a desired amount of flowing water can be reduced.

  Thus, if the width direction dimension between the left and right leg members 16, 16 is reduced, the amount of concrete material required when placing the invert adjusting concrete 31 can be reduced, and the construction cost is reduced. Can be suppressed.

  Moreover, the FRP board | plate material 20 can exhibit favorable abrasion resistance by using for the part which faces the water passage space 18 in which a deterioration rate is low and water flow is performed over a long period of time.

  For example, as the concrete material is exposed on the surface on the side of the water passage space 18 in contact with water, the surface is uneven due to wear, and the water flow resistance is increased by roughening the surface. There is no fear of it.

  Thus, the surface on the side of the water passage space 18 is covered with the smooth resin material of the FRP plate material 20... So that a smooth state can be maintained over a long period of time without changing the water passage resistance. A desired flow rate can be maintained.

  Therefore, since the maintenance interval can be lengthened, it is suitable for use as a drainage structure for facilities that require weather resistance and continuity such as airports and harbor facilities.

  Furthermore, in this Example 1, as shown in FIG.8 and FIG.9, each FRP board | plate material 20 is embed | buried when the portal type | mold member 13 is precast-molded by several anchor protrusion parts 21 and 21 on the back surface side. And integrated.

  For this reason, even if a force in the peeling direction acts on each of these FRP plate members 20 by passing water, the anchor projections 21 and 21 are embedded in the concrete so as not to be inserted and removed. The FRP plate 20 is difficult to peel off.

  Further, on both left and right side edge portions of each FRP plate material 20 of the first embodiment, connection flange portions 22 and 22 are formed substantially vertically from the back surface side in a substantially L-shaped cross section, and are arranged adjacent to each other. The bolt member 23 and the nut member 24 are used and fastened with the connecting flange portion 22 of the other FRP plate material 20.

  The fastening between the connecting flange portions 22 and 22 by the bolt member 23 and the nut member 24 is performed before the gate-shaped member 13 is precast molded, and then is embedded and integrated at the time of precast molding.

  For this reason, the gate-shaped member 13 can be configured in advance by giving a high assembling accuracy so as not to cause a step between the surfaces of the FRP plates 20 and 20 arranged in parallel facing the water passage space 18. The variation in surface accuracy due to construction at the construction site can be reduced.

  Next, an effect is demonstrated along the drainage order of the portal type precast concrete drainage structure of this Example 1. FIG.

  In the first embodiment, pavement precast concrete plate 15 of the parking lot 11 is formed on the upper surface portion 14 of each gate-shaped member 13 so that the water channel space 18 and the upper external space are separated from each other. Rainwater flows into the water passage space 18 from the communicating grating opening 14b.

  With the grating opening 14b, the upper surface portion 14 can reduce the amount of precast concrete used and suppress an increase in manufacturing cost.

  Moreover, since weight reduction can be achieved, workability is further favorable.

  The rainwater that has flowed into the water passage space 18 is located downstream of these drainage channels 19 (on the left side of the paper in FIG. 3) by a drainage gradient provided on a flowing water inclined surface 30 formed at the bottom of the drainage channel 19. The water is drained by flowing in a certain direction along the extending direction of the concave groove 12.

  This flowing water inclined surface 30 can be easily applied to the upper surface portion of the concrete foundation 102 formed in the staircase shape without affecting the level of the precast concrete plate material 15 by placing invert adjusting concrete at the construction site. Therefore, the workability is further improved.

  As described above, the drainage system using the gate-type precast concrete drainage structure and the gate-type precast concrete drainage structure of Example 1 is lightweight, has good workability, and can drain efficiently and can be maintained. Therefore, it is suitable for use as a drainage structure for facilities that require weather resistance and continuity such as airports and harbor facilities.

  10 to 15 show a gate-type precast concrete drainage structure of Example 2 of the embodiment of the present invention, a drainage system using the gate-type precast concrete drainage structure, and a gate type used for the gate-type precast drainage concrete water distribution structure. The member is shown.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said embodiment and Example 1. FIG.

  First, in terms of configuration, in the portal member 113 of the second embodiment, the left and right legs are provided on the inner side surface portions 16e and 16e of the left and right leg portions 16 and 16 located below the step portion 16d. A plurality of FRP plate members 120 as resin reinforced plate members are attached to face the water passage space 18 formed between the portions 16 and 16.

  As shown in FIG. 12, the FRP plate member 120 of Example 2 has a substantially rectangular plate shape that is horizontally long when viewed from the front.

  Further, as shown in FIGS. 14 and 15, each FRP plate member 120 of Example 2 has a plurality of anchor protrusions 121, 121 protruding integrally on the back surface side, and the portal member 113 is precast. By embedding at the time of molding, the FRP plate material 120 is formed so as not to be peeled off.

  Further, on both upper and lower right side edges of each FRP plate member 120 of the second embodiment, connecting flange portions 122 and 122 are formed substantially vertically from the back side in a substantially L-shaped cross section, and are arranged adjacent to each other. The bolt member 23 and the nut member 24 are used and fastened with the connecting flange portion 122 of the other FRP plate member 120 to be fixed in a state of being juxtaposed in the water passage space 18. ing.

  Next, the gate-type precast concrete drainage structure of Example 2, the drainage system using the gate-type precast concrete drainage structure, and the operational effects of the gate-shaped member will be described.

  In Example 2, in addition to the operational effects of the embodiment and Example 1, each of the FRP plate members 120... Has the left and right legs 16, 16 along the longitudinal direction in the horizontal direction. It faces the water passage space 18 formed therebetween.

  For this reason, the water flow resistance can be further improved.

  Other configurations and functions and effects are the same as or equivalent to those of the above-described embodiment and Example 1, and thus description thereof is omitted.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  That is, in the above-described embodiment, the FRP plate materials 20 and 120 have been described as the resin reinforcing plate materials. However, the present invention is not limited to this, and for example, left and right leg portions such as CFRP plate materials, GFRP plate materials, KFRP plate materials, Of course, any shape, quantity, and material may be used as long as they face the water passage space 18 formed between the sixteen and sixteen.

The state that the gate type precast concrete drainage structure of Example 1 of the best mode of the present invention, the drainage system using the gate type precast concrete drainage structure, and the gate type members used for the gate type precast concrete drainage structure are arranged. It is shown and it is a partial cross section perspective view explaining the whole structure. It is a bird's-eye view explaining the structure of the parking lot of the airport to which the portal type precast concrete drainage structure of Example 1 of an embodiment is applied. In the portal type precast concrete drainage structure of Example 1 of an embodiment, it is a longitudinal section at a position along a water passage space. It is a perspective view of the gate type member used for the gate type precast concrete drainage structure of Example 1 of an embodiment. It is a partial cross section perspective view of the gate type member used for the portal type precast concrete drainage structure of Example 1 of an embodiment. It is a side view which shows a mode that the gate-shaped member is supporting the pavement precast concrete board | plate material by both sides by the portal-type precast concrete drainage structure of Example 1 of an embodiment. In the portal type precast concrete drainage structure of Example 1 of an embodiment, it is a longitudinal section of a portal type member. FIG. 7 is a horizontal sectional view at a position along the line BB in FIG. 6 for explaining the configuration of the gate-shaped member in the portal-type precast concrete drainage structure of Example 1 of the embodiment. FIG. 9 is an enlarged cross-sectional view of a portion C in FIG. 8 illustrating the configuration of the gate-shaped member in the portal-type precast concrete drainage structure of Example 1 of the embodiment. It is a partial cross section perspective view of the gate type member used for the gate type precast concrete drainage structure of Example 2 of an embodiment. It is a side view which shows a mode that the gate type member is supporting the pavement precast concrete board | plate material by the both sides by the portal type precast concrete drainage structure of Example 2 of an embodiment. In the portal type precast concrete drainage structure of Example 2 of an embodiment, it is a longitudinal section of a portal type member. FIG. 7 is a horizontal cross-sectional view at a position corresponding to the position along the line BB in FIG. 6 for explaining the configuration of the gate-shaped member in the portal-type precast concrete drainage structure of Example 2 of the embodiment. It is a side view of the FRP board | plate material affixed on a portal type member by the portal type precast concrete drainage structure of Example 2 of embodiment. It is a reverse view of the FRP board | plate material affixed on a portal type member by the portal type precast concrete drainage structure of Example 2 of embodiment. It is a partial cross section perspective view of the principal part explaining the structure of the drainage structure of a prior art example. It is a longitudinal cross-sectional view of a U-shaped side groove member for explaining how to apply an uneven load in the drainage structure of the conventional example.

Explanation of symbols

12 concave groove parts 13 and 113 portal-type member 14 upper surface part 14a bridge-like part 14b grating opening 15 pavement precast concrete board 16 and 16 both leg parts 16a and 16a upper edge 16b and 16b outer side surface part (side surface part)
16c, 16c Arm portions 16d, 16d Step portions 16e, 16e Inner side surface portion 18 Water passage space 19 Drain passage 20, 120 FRP plate material (resin-reinforced plate material)
30 Flowing water slope 31 Invert adjusted concrete

Claims (8)

A gate-shaped member made of precast concrete having a top surface portion having a bridge-like portion for connecting upper edges of the left and right leg portions so as to be integrated, and forming a water passage space between the left and right leg portions. Is a precast concrete drainage structure that forms a drainage channel under the ground surface by connecting a plurality of
A pair of stepped portions projecting integrally from the side portions of the left and right leg members toward the outside, and the upper surface of the stepped portion is substantially flush with the upper surface portion of the portal member. A precast concrete drainage structure characterized by locking each precast concrete plate material.   The said portal member faces the water passage space formed between the left and right leg members, and a resin-made reinforcing plate is attached to the inner side surface of the leg members. The precast concrete drainage structure according to 1.   3. The gate-shaped member has an opening formed in the upper surface portion so that a grating opening for mounting the grating member is communicated with the water passage space and the external space. Precast concrete drainage structure.   The portal member is characterized in that a dimension from an upper surface portion having the bridge-shaped portion to an upper surface of the stepped portion is set in advance according to a pavement precast concrete plate material having a certain thickness. The precast concrete drainage structure according to any one of Items 1 to 3.   On the bottom surface of the concave groove formed concavely from the ground surface, a stepped foundation formed in steps with different height dimensions is provided, and the upper surface of each step of the stepped foundation A plurality of the gate-shaped members having both left and right leg portions formed with different height-wise dimensions so that the upper surface portions of the portal-shaped members are flush with each other in the height direction Is installed on the upper surface of each step portion so that the height direction position of the upper surface portion of the gate-shaped member is matched with the height direction position of the ground surface, and the pavement precast that is locked to the step portion. The drainage system using the precast concrete drainage structure according to any one of claims 1 to 4, wherein an upper surface portion of the concrete board is provided substantially horizontally on the ground surface together with the upper surface portion of the gate-shaped member.   The base upper surface portion located between the left and right leg members has a predetermined slope, and a flowing water inclined surface for flowing water in one direction of the water passage is formed. The drainage system using the precast concrete drainage structure of claim | item 1 thru | or 4.   The drainage system using the precast concrete drainage structure according to claim 6, wherein the flowing water inclined surface is formed by placing invert adjusting concrete on the upper surface portion of the foundation. 5. A pre-cast concrete is formed in advance, and is disposed adjacent to the upper surface of the foundation, thereby forming a drainage channel that connects the water channel spaces below the ground surface. Portal-type member used for the precast concrete drainage structure described.

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