JP2007254957A - Outdoor drainage facility for countermeasure against differential settlement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor drainage facility capable of preventing differential settlement between a building and an outdoor buried drainage system and between outdoor buried drainage systems and constructible at low cost. <P>SOLUTION: The outdoor drainage facility 10 for a countermeasure against differential settlement comprises brackets 13 fixed to the building 11; catch basins 14 made of synthetic resin and receiving drainage from the building, and drain pipes 15 made of synthetic resin and connecting the catch basins to each other, wherein the catch basins 14 and the drain pipes 15 are supported by the brackets 13. A cage 16 formed of wire mesh is arranged to surround the drain pipes 15 with a clearance to the drain pipes, and the inside of the cage 16 is backfilled more coarsely than the outside ground. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an outdoor drainage facility for preventing uneven settlement. More specifically, the present invention relates to an outdoor drainage facility that is provided on the exterior of a building and ultimately allows drainage from a plurality of locations of the building to flow to a public gathering.

  As shown in FIG. 5 and FIG. 6, the drainage basin 101 and the drainage pipe 102 that flow the drainage from the building 100 are connected to the public sewer main, so that a predetermined gradient can be taken toward the public basin 103. Install in a trench excavated around the building. Such a drainage basin 101 is often made of concrete regardless of sewage, rainwater or miscellaneous drainage. And in order to fully support the weight of the water accumulated inside, as shown in FIG. 6, the bottom 104 of the excavation groove is hardened by rolling or the like, and the split chestnut 105 is laid thereon, and then the drainage trough 101 is installed. Moreover, also about the drain pipe 102 which connects between the drains 101, the sleeper 106 is laid in the bottom part of a digging ditch, and it installs on it.

  By the way, when the surface ground is weak, the building is driven into a strong underground ground with a pile designed for strength, and the foundation of the building is provided on the pile, or the footing 107 provided at the lower end of the underground beam is supported by the underground ground. However, since outdoor buried drainage systems such as the drainage basin 101 and drainage pipe 102 are only installed on the surface ground, there is a difference in the amount of settlement, resulting in uneven settlement. Therefore, conventionally, the pipe 108 extending from the building 100 to the drainage basin 101 is connected to the drainage basin 101 via a flexible joint 109 that allows vertical displacement. Reference numeral 110 denotes a pit for maintenance of the flexible joint 109.

  On the other hand, as a countermeasure against earthquakes, the main body of the drainage basin and the riser pipe rising from the main body of the drainage basin are connected in a vertically movable manner and in a watertight manner. There has been proposed a drainage basin in which the lid at the upper end of the pipe does not protrude from the ground surface or sink (see Patent Document 1). In addition, a buried pipe having a telescopic structure that allows the rising pipe to move in the axial direction has also been proposed (see Patent Document 2 and Patent Document 3).

JP-A-7-3874 Japanese Utility Model Publication No. 1-83988 JP-A-6-229002

  The method of interposing a flexible joint between the pipe coming out of the building and the external pipe absorbs the difference in settlement between the building and the outdoor buried drainage system, but the pipe slope changes due to unequal settlement between the drainage basins. Or the drainage pipe connecting the drainage basins may be damaged. In addition, since the slope of the drainage pipe is set by split chestnut or embankment on the surface ground, the amount of slope is used and the slope of the final pipe to the public dredging is often close to zero. In addition, after the completion of the construction, if the slope reverses due to uneven settlement or damage to the drainage pipe, it will be necessary to excavate again for repair work. Further, the flexible joint itself is expensive, and further requires a maintenance space such as the pit 110 in the immediate vicinity of the building, which further increases the cost.

  The present invention provides an outdoor drainage system that can prevent uneven settlement between a building and an outdoor buried drainage system and can also prevent uneven settlement between an outdoor buried drainage system and can be constructed at a low cost. It is a technical issue to do.

  An outdoor drainage facility for unequal settlement according to the present invention (Claim 1) includes a support member fixed to a building, a drainage basin that receives drainage, and a drainage pipe that connects the drainage basins, The drain pipe is supported by the support member.

  Such an outdoor drainage facility has a sheet disposed with a gap between the drain pipe and the drain pipe so as to surround the drain pipe, and the gap between the sheet and the drain pipe is the ground outside the sheet. What is more coarsely backfilled is preferred (claim 2). It is preferable that the sheet is composed of a net or a bag. Moreover, it is preferable that the drainage pipe and the drainage basin are made of a synthetic resin.

  In the outdoor drainage facility of the present invention (claim 1), the drainage basin and the drainage pipe are supported by the building via the support member. The tube does not sink with the building. On the contrary, even if the building sinks, the amount of sinking of the building is the same as the amount of sinking of the entire outdoor drainage pipe system, so that uneven settlement can be prevented. Furthermore, the amount of subsidence of the drainage basins and the amount of subsidence of the drainage pipes become the same through the building and the support member. Therefore, uneven settlement between them is prevented, and the drain pipe is not damaged or the gradient is not changed.

  An outdoor drainage facility having a sheet disposed with a gap between the drain pipe and the drain pipe so as to surround the drain pipe, and the gap between the sheet and the drain pipe is backfilled more coarsely than the ground outside the sheet (Claim 2) does not receive strong resistance from the surrounding ground when the drain pipe descends due to the settlement of the building. Therefore, unequal settlement can be further prevented.

  In the case where the sheet is constituted by a net or ridge (Claim 3), the water permeability of the sheet is high, and even if the sheet is deformed by the surrounding earth pressure, the drain pipe is hardly affected. When the drainage pipe and drainage basin are made of synthetic resin, they are lightweight, so the burden on the support member is small.

  Next, an embodiment of an outdoor drainage facility for unequal settlement according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the outdoor drainage equipment of the present invention, FIG. 2 is a side view of the outdoor drainage equipment, FIG. 3 is a process diagram showing the installation procedure of the outdoor drainage equipment, and FIG. It is a front view which shows embodiment of the hanging structure of the drainage pipe concerned.

  An outdoor drainage system 10 shown in FIG. 1 includes a bracket 13 that is fixed to a foundation portion of a building 11 or an underground beam 12, a drainage basin 14 that receives drainage from the building 11, and a drainage pipe that connects the drainage basins. 15, a drainage basin 14 a that is disposed at a bent portion of the drainage pipe 15 and functions as a collective trough, and a trough 16 that is disposed so as to surround the drainage pipe 15. In this embodiment, the drain pipe 15 is suspended and supported by the bracket 13, and the drainage basins 14 and 14 a connected to the drain pipe 15 are supported by the building 11 via the drain pipe 15 and the bracket 13.

  The bracket 13 is formed of structural steel or the like. In this embodiment, as shown in FIG. 3, the bottom plate 17, the rising plate 18 rising from the rear end of the bottom plate, and the tips of the two are connected. It is comprised from the inclination board 19 to connect, for example, is integrated by welding etc. Each plate is preferably provided with reinforcing ribs, and may be made of a steel plate such as L-shaped steel (angle) or I-shaped steel. The rising plate 18 is fixed to the underground beam 12 by anchor bolts 20 and nuts 21 embedded or driven into the concrete underground beam 12 which is the foundation of the building 11.

  The bracket 13 is made of stainless steel, carbon steel coated with coal tar, coated with a petrolatum paste on the surface of the carbon steel, and then wrapped with a petrolatum-based anticorrosion tape so as to have high durability in the ground. It can also be manufactured with things. The number of brackets 13 is not particularly limited, but normally, about one or two places on one drain pipe 15 are supported by brackets 13. The bracket 13 may be turned upside down and the drain pipe 15 may be installed on the bracket, or another shape of bracket may be employed.

  As shown in FIG. 2, the drainage basin 14, 14 a includes a container-like casket main body 22, a cylindrical inspection cylinder 23 extending upward, and a lid body 24 that closes an upper end opening thereof. Yes. Further, a ring-shaped frame 25 and a lid member 26 that closes the central opening of the frame member are provided on the ground surface above the lid 24. The reason why the inspection cylinder 23 and the frame body 25 are separated is to leave the lid member 26 on the ground surface even if the drainage basin 14 sinks unevenly. The bag main body 22, the inspection cylinder 23 and the lid 24 are preferably made of a synthetic resin such as polyvinyl chloride. Thereby, the whole outdoor drainage system becomes lightweight, and the burden on the drainage pipe 15 and the bracket 13 is reduced. In addition, since the inner surface is smooth, it is possible to smoothly flow even wastewater.

  The main body 22 of the drainage basin 14 is connected to a drainage pipe 27 coming out of the building 11. The pipe 27 is connected to the horizontal pipe 28 penetrating the underground beam 12 via a right angle elbow, and connects the vertical pipe 29 extending downward, the lower end of the vertical pipe 29, and the rod main body 22 via the right angle elbow. The second horizontal tube 30 is made up of. These pipes 27 are also preferably made of a lightweight synthetic resin such as polyvinyl chloride. Moreover, although the flexible joint 33 is used for the piping 32 to the public fence 31, the flexible joint is not used for the piping 27 that drains to the outside of the building 11.

  The drain pipe 15 is connected to the main bodies 22 of the drain pipes 14 and 14a, and is substantially horizontal and set to a predetermined gradient. At least one, preferably two, are supported by the bracket 13. As shown in FIG. 3, the drain pipe 15 is fastened to the vicinity of the tip of the bottom plate 17 of the bracket 13 by, for example, a conventionally known U-shaped bolt 34 and a nut 35. The gradient of the drain pipe 15 can be precisely set by the mounting height of the bracket 13, but when further fine adjustment is performed, a spacer or the like is interposed between the drain pipe 15 and the bottom plate 17. However, it can be configured so that it can be continuously adjusted with a screw or the like.

  The drain pipe 15 may be directly attached to the bracket 13 as shown in FIG. 3, or may be hung from the bracket 13 with a suspension band 36 and a suspension bolt 36a as shown in FIG. Thus, by suspending with the suspension band 36 etc., piping work can be performed with a precise gradient. Further, when the drain pipe 15 is installed in the ground deeper than the lower surface of the building foot 37, the suspension band 36 and the suspension bolt 36a can be used to easily integrate with the building.

  The gutter 16 surrounding the drain pipe 15 can be constituted by, for example, a metal mesh wound in a cylindrical shape. If the wire mesh used for the eaves 16 is, for example, a plain weave wire mesh, one having a mesh of 3 to 10 using a corrosion-resistant coated steel wire or stainless steel wire having a diameter of 0.3 to 1.2 mm as a strand is preferable. In the case of a turtle shell wire net, a linear 0.5 to 1.5 mm nominal stitch 6 to 20 mm is preferable. Since such a wire mesh has a large gap, it has high water permeability and flexibility, so that it is easy to construct and has a certain degree of pressure resistance against earth pressure.

  As shown in FIG. 1, the aforementioned drainage pipe 15 is disposed along the wall of the building 11, and drainage provided at a corner portion of the building 11 while joining at the drainage pipe 27 coming out from the building 11 and the drainage basin 14. A gradient is applied so as to gradually descend toward the ridge 14a. As shown in FIG. 2, the drainage basin 14a where the drainage finally collects is connected to a public basin 31 installed in the ground on the site adjacent to the public road through a thick pipe 32 and a flexible joint 33. The In this case, construction until the connection to the public fence 31 is on-site construction. In addition, the code | symbol 38 of FIG. Symbol GL indicates a ground level.

  Next, a method for installing the outdoor drainage equipment 10 will be described. First, as shown in FIG. 1, the surroundings of the underground beam 12 of the building 11 are excavated. After the underground beam 12 is formed of concrete, it may be backfilled partway. Next, the bracket 13 is fixed to the underground beam 12, and the drain pipe 15 is attached to the bracket 13 with the U bolt 34 or the like. Further, a drainage basin 14 is connected to the drainage pipe 15. Next, as shown in the first step S1 of FIG. As shown in FIG. 2, the first sand layer 39, the second sand layer 40, and the third sand layer 41 are used for backfilling, and each layer is rolled.

  Then, as shown in the second step S <b> 2 of FIG. 3, the wire mesh 42 for forming the ridge is bent into a substantially semi-cylindrical or U-shaped shape and installed below the drain pipe 15. The space between the sand layers 40 and 41 and the wire mesh 42 is backfilled with the same sand as each sand layer. Further, the sand 43 is filled inside the wire mesh 42 at a coarser density than the outside of the wire mesh 42. A soft material such as a polystyrene foam piece may be mixed in the sand 43. Then, as shown in the third step S3, the upper portion of the wire mesh 42 is closed in a semicircular shape, and the ridge 16 is formed. At a part that interferes with the bracket 13 or the drainage basin 14, a measure is taken to cut or bend the wire mesh 42. Then, as shown in FIG. 2, the upper part of the third sand layer 41 is buried, and the first good quality soil layer 45 and the second good quality soil layer 46 are refilled thereon, and the vicinity of the ground surface is backfilled with the soil 47 so that the surroundings are unnatural. So that there is no.

  Since the drainage pipe 15 and the drainage basins 14 and 14a are integrated with the building 11 by the bracket 13 in the outdoor drainage system 10 configured as described above, even if the backfilled surrounding soil sinks, the building 11 Does not sink unevenly between. In addition, uneven settlement between the drain pipes 15, between the drain pipes 14, or between the drain pipe 15 and the drain pipe 14 is also prevented. Therefore, there is little damage to the equipment of the outdoor drainage system, and troubles in which the gradient is reversed are reduced. In addition, as shown by 3rd process S3 of FIG. 3, since the circumference | surroundings of the drainage pipe 15 are surrounded by the fence 16, and the density of the sand 43 inside is low, even if the surrounding soil sinks, the drainage pipe 15 can maintain its original height (imaginary line 15a) without much resistance. Further, since the inspection cylinder 23 of the drainage basin 14 is made of synthetic resin, it is easy to slip with respect to the surrounding soil, and is not easily affected by settlement.

  Furthermore, since the number of flexible joints that are expensive and require maintenance space such as pits on the building side is reduced, work is reduced and costs are reduced. Moreover, since the gradient of the drainage pipe between the ribs can be defined by a bracket, a suspension band, and a suspension bolt, the accuracy is good. Therefore, for example, it can be set with a gradient of about 1/100. Therefore, the height difference used in the outdoor drainage system can be reduced, and the piping gradient to the public dredger can be sufficiently secured.

  In the above embodiment, the drain pipe 15 and drain pipe 14 are made of synthetic resin, but are made of a metal having high corrosion resistance such as stainless steel or an inner lining steel pipe with an outer surface coated with a petrolatum paste and an anticorrosion tape. You can also. Moreover, although the bracket 13 is made of metal, it can be made of synthetic resin or concrete. Moreover, although the cage | basket comprised with the metal net | network is provided around the drain pipe 15, it can also comprise with a synthetic resin net | network, such as a resin turtle shell net | network, and a bamboo fence. The scissors do not necessarily have flexibility, and can be constituted by a highly rigid sheet such as a thin stainless steel punching metal.

It is a perspective view showing one embodiment of the outdoor drainage equipment of the present invention. It is a side view of the outdoor drainage equipment of FIG. It is process drawing which shows the installation procedure of the outdoor drainage facility of FIG. It is a front view which shows embodiment of the suspension structure of the drain pipe concerning this invention. It is a perspective view which shows an example of the conventional outdoor drainage facility. It is a side view of the outdoor drainage equipment of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Outdoor drainage equipment 11 Building 12 Underground beam 13 Brackets 14 and 14a Drainage pipes 15 and 15a Drainage pipes 16 and 17 Bottom plate 18 Standing plate 19 Inclined plate 20 Anchor bolt 21 Nut 22 Shaft body 23 Inspection cylinder 24 Cover body 25 Frame body 26 Lid member 27 Piping 28 coming out of the building Horizontal pipe 29 Vertical pipe 30 Second horizontal pipe 31 Public pipe 32 Thick pipe 33 Flexible joint 34 U-shaped bolt 35 Nut 36 Suspension band 36a Suspension bolt 37 Split 38 Split chest GL Ground level S1 1st process S2 2nd process S3 3rd process 39 1st sand layer 40 2nd sand layer 41 3rd sand layer 42 Wire net 43 Sand 45 1st quality soil layer 46 2nd quality soil layer 47 On-site soil layer

Claims (4)

A support member fixed to the building;
It has a drainage basin that receives drainage and a drainage pipe that connects the basins,
The drainage pipe and drainage pipe are supported by the support member,
Outdoor drainage equipment for uneven settlement. A sheet that is disposed with a gap between the drain pipe so as to surround the drain pipe,
The outdoor drainage equipment for uneven settlement according to claim 1, wherein the gap between the sheet and the drain pipe is backfilled more roughly than the ground outside the sheet.   The outdoor drainage device for preventing uneven settlement according to claim 2, wherein the sheet is a net or a gutter. The outdoor drainage device for uneven settlement according to claim 1, wherein the drain pipe and drainage basin are made of synthetic resin.

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