JP2008223313A - Installation structure of riser with spiral guide passage, and repair method for the riser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an installation structure of a riser with a spiral guide passage, which is equipped with a structure for preventing the lift of the riser, and which enables the operation of repairing the riser on the occurrence of troubles such as the clogging of the riser in a manhole and damage to the riser and the operation of replacing the riser in the case of a deterioration in the riser to be performed without the destruction of the manhole. <P>SOLUTION: In this installation structure of the riser 2, a space section 3, which is formed between the riser 2 and an inner wall of the manhole 1, is filled with a filler 4 which is composed of a granular material allowing the intrusion of water into the manhole 1, and weight against buoyancy acting on the bottom of the riser 2 is provided, so that the action of preventing the lift of the manhole can be provided. A blade member 5, which is formed in an outward overhanging shape, is annexed to the outer peripheral surface of the riser 2, so as to enhance the integration of the filler 4 with the manhole 1 in the space section 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an installation structure of a vertical pipe with a spiral guide path that is used for a vertical sewer pipe having a height difference and attenuates a water flow that naturally flows down, and a repair method for the vertical pipe.

  Conventionally, the upper end of the vertical pipe is connected to one end of the inflow pipe disposed on the side wall of the manhole, the lower end of the vertical pipe is installed at the bottom of the manhole, and the sewage flowing into the manhole is introduced into the vertical pipe. Technology is known. In the sewer, the basin sewer main line is planned at a relatively deep position in the ground, and it is a high head junction at the connection point with the related public sewer.

  For this reason, when a high head process is performed in one manhole, the vertical pipe provided in the manhole becomes long, so the drop impact of sewage flowing out from the lower end of the vertical pipe is large, and the bottom of the manhole may be damaged. was there.

  Therefore, in order to prevent the inside of the manhole from being damaged by the sewage flowing down naturally in the manhole, for example, as described in Patent Document 1, from the upper end to the lower end along the inner surface of the straight tubular vertical pipe, A technique of installing a vertical tube (drop shaft) in which a spiral guide plate formed in a spiral shape is installed in a manhole has been implemented.

  This type of vertical pipe is provided with a spiral guide path that causes sewage to spirally flow down with respect to a vertically arranged vertical pipe main body. This attenuates the flow energy of the sewage that has flowed into the manhole, so that the bottom of the vertical pipe is not subject to strong impact or load by the sewage that has flowed down, and the wear of the bottom can be suppressed by ensuring the strength. Is formed. In addition, a hollow center tube (air vent core tube) is provided at the shaft core portion of the spiral guide path to exclude upward the air contained in the sewage guided by the spiral guide path.

In such a longitudinal pipe with a spiral guideway, the flow rate of sewage flowing into the upper end of the longitudinal pipe is attenuated while flowing down along the spiral guideway. The sewage in the attenuated state flows out from the discharge port provided at the bottom of the vertical pipe. Therefore, there is no possibility that a load of flowing water or a strong impact will act on the bottom of the manhole, and the damage and wear of the bottom are suppressed.
JP-A-8-41915

  In such a conventional vertical tube in a manhole, if a foreign material that should not be included is mixed into the sewage, and this foreign material flows into the vertical tube, the spiral guide path of the vertical tube is It may be clogged, impeding the flow of sewage, or causing deterioration of the environment in the vertical pipe and manhole. In this case, it is difficult to remove the foreign matter clogged in the vertical pipe, and it is necessary to cope with the problem by replacing the vertical pipe clogged with foreign matters partially or by replacing the whole vertical pipe with a new one.

  However, the vertical pipe in the manhole is generally formed such that the outer peripheral surface is integrated with the manhole by mortar. For this reason, it is usually not easy to replace the vertical pipe, and measures are taken by providing a mechanism for preventing foreign matter from flowing into the vertical pipe at the inflow portion of the vertical pipe. In addition to such measures, if the case where foreign matter is clogged in the vertical guide of the vertical pipe should be taken into consideration, the workability when the vertical pipe needs to be replaced due to aging is taken into consideration. For example, it is more desirable that the vertical tube installed in the manhole is structured so that it can be easily replaced in advance.

  Further, if the ground where such a vertical pipe is installed may be liquefied due to an earthquake or the like, buoyancy may occur because the apparent specific gravity of the vertical pipe is smaller than that of the liquefied ground. When this buoyancy acts on the vertical pipe, not only the vertical pipe rises, but there is a risk of damaging the pipe connected to the vertical pipe or crushing the road pavement layer above the manhole. A manhole equipped with a vertical pipe must also have a vertical pipe floating prevention structure.

  Therefore, the present invention has been made in view of the above circumstances, and troubles such as replacement work of the vertical pipe when the vertical pipe in the manhole becomes obsolete, clogging or damage to the vertical pipe, etc. The installation structure of the vertical pipe with the spiral guide path which can be relatively easily performed without destroying the manhole and can prevent the vertical pipe from rising in the manhole, and the vertical structure. It provides pipe renovation methods.

  In order to achieve the above-described object, the installation structure of a vertical pipe with a spiral guide path according to the present invention is provided with a spiral guide path in the vertical pipe that causes the fluid that has flowed in the manhole to flow down spirally. A space formed between the pipe and the manhole inner wall is filled with a filler made of a particulate material that allows intrusion water in the manhole, and has a weight that resists buoyancy acting on the vertical pipe. It is characterized by having a vertical tube floating prevention function.

  By such an invention, even if the ground where the vertical pipe is installed may be liquefied due to an earthquake or the like, it becomes possible to prevent the vertical pipe from rising, damage to the pipe connected to the vertical pipe, It is also possible to avoid crushing the road pavement layer above the manhole. In addition, since the space is filled with filler, it is possible to easily remove the filler in parts that require refurbishment in the future, without breaking the manholes and vertical pipes. Can be repaired.

  Specifically, the filler preferably contains sand, silica sand, or a water-absorbing polymer. By using these materials, it is easy to fill and remove the filler, and it is possible to fill the space densely by following the shape of the space, and it is also possible to cope with intrusion water in the manhole. .

  In the present invention, the tube wall of the vertical pipe is provided with an intermediate hole portion that can be closed facing the equal height position of the vertical pipe.

  The intermediate hole portion may be configured such that a hole forming member having a grout hole is attached to a hole portion provided in a pipe wall of a vertical pipe, and a lid is press-fitted into the hole forming member. Good.

  By providing such an intermediate hole in the vertical pipe, when the filler filled in the space is later removed, it is possible to work efficiently and facilitate maintenance. .

  In the present invention, the outer peripheral surface of the vertical pipe is provided with a blade member that projects outward.

  The blade member may be provided in a plurality of stages in the height direction of the vertical pipe. The blade member may be formed by arranging a plurality of blade members equally in the circumferential direction of the vertical pipe.

  By providing such a blade member, the filler in the space can be integrated with the manhole and the vertical tube, and the vertical tube can be prevented from rising. Moreover, the positioning effect by a blade | wing member can be acquired at the time of installation of a vertical pipe, and it becomes possible to construct efficiently.

  Further, in order to achieve the above-described object, the method for repairing a vertical pipe with a spiral guideway according to the present invention can allow intrusion water in the manhole in a space formed between the vertical pipe and the inner wall of the manhole. Filler removal step of sucking the filler filled in the space and discharging and removing it from the manhole with respect to the vertical pipe configured to be filled with a filler made of a particulate material and have a floating prevention function And a vertical pipe replacement step of taking out at least a part of the existing vertical pipe exposed in the manhole by this process from the manhole and replacing the part with a new vertical pipe.

  With such an invention, the vertical pipe can be prevented from rising and repaired when troubles such as clogging or damage occur in the vertical pipe in the manhole, and the vertical pipe when the vertical pipe becomes obsolete. The replacement work can be flexibly handled, and these can be performed relatively easily without destroying the manhole.

  Further, in the present invention, an intermediate hole portion that can be closed is provided in the pipe wall of the vertical pipe, and the filler removing step opens the intermediate hole portion and uses the suction means to the space portion. The filled material may be drawn from the intermediate hole portion into the vertical tube and discharged through the vertical tube to the outside of the vertical tube.

  Further, the filler removing step may be performed by sucking the filler from above the space portion using a suction means.

  In any filling material removal process, it is possible to easily remove the necessary part of the filler to replace the vertical pipe installed in the manhole, and the necessary place without destroying the manhole or vertical pipe. It is also possible to proceed with refurbishment only.

  According to the installation structure of the vertical pipe with a spiral guideway and the repair method of the vertical pipe of the present invention configured as described above, the vertical pipe in the manhole is clogged while having a structure for preventing the vertical pipe from rising. It becomes possible to relatively easily repair and replace the vertical pipe without causing damage to the manhole when troubles such as damage occur or the vertical pipe becomes old.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out a vertical pipe installation structure with a spiral guide path and a method for repairing the vertical pipe according to the present invention will be described below with reference to the drawings.

  1 to 4 show an example of an installation structure of a vertical pipe with a spiral guide path according to the present invention, FIG. 1 is an explanatory view of the installation structure of the vertical pipe, FIG. 2 is a perspective view of a hole forming member provided in the vertical pipe, FIG. 3 is an explanatory view showing a state where a manhole is filled with a filler, and FIG. 4 is a cross-sectional view showing a state where a blade member is attached to a vertical pipe.

  As shown in FIG. 1, in a concrete manhole 1, one straight tubular vertical pipe 2 is installed as a sewer pipe. The vertical pipe 2 is connected to the inflow pipe 11 and is configured by further sequentially connecting an upper spiral guide path 21, an intermediate guide path 22 and a lower spiral guide path 23 downward.

  As a result, in the manhole 1, the fluid that has flowed into the vertical tube 2 can flow down spirally. The fluid flowing down the vertical pipe 2 is discharged out of the manhole 1 from the lower outflow pipe 12.

  The vertical pipe 2 is formed by connecting a plurality of short pipes into a straight tube by a receiving method, or connecting the short pipes to each other using a suitable joint member. It may be configured as follows.

  An intermediate hole portion 24 that can be closed is provided on the tube wall of the vertical tube 2 formed in this way. As shown in FIG. 1, in the illustrated embodiment, two intermediate hole portions 24 are formed in the side tube wall of the intermediate guide path 22.

  These intermediate hole portions 24 can be formed using the hole forming member 25 having the grout hole 251. The hole forming member 25 may be of the form illustrated in FIG. The hole forming member 25 is, for example, a molded product of FRP, and is a front circular bowl-shaped main body portion 252 formed in a shape along the outer peripheral surface of the vertical tube 2 on which the grout hole 251 is provided, and a rear side central portion of the main body portion. And a cylindrical boss portion 253 integrally formed therewith. A grout hole 251 is provided in the center of the hole forming member 25. The hole forming member 25 is fixed to the tube wall using a method of using an adhesive in the hole formed in the tube wall of the vertical tube 2 or an appropriate fixing method such as a hand layup method using FRP or the like.

  The hole forming member 25 has a structure that can be closed by press-fitting a lid 254. The lid body 254 is made of, for example, a resin molded product of modified PPE, and includes a solid cylindrical insertion portion so as to be fitted into the grout hole 251. A female screw may be formed on the inner surface of the grout hole 251, and a male screw that meshes with the female screw may be formed on the outer peripheral surface of the lid 254. As shown in FIG. 3, the lid body 254 is fitted into the hole forming member 25 to close the intermediate hole portion 24 when the vertical pipe 2 is installed.

  In the manhole 1 in which such a vertical tube 2 is installed, a space 3 is formed between the vertical tube 2 and the inner wall of the manhole 1. This is because the vertical pipe 2 needs to be separated from the wall surface of the manhole 1 to some extent in order to connect the inflow pipe 11 and the vertical pipe 2. In the manhole 1, the vertical tube 2 may be disposed closer to the center portion, or may be disposed so as to approach the wall. The arrangement of the vertical pipes 2 is appropriately determined depending on the arrangement and number of the inflow pipes 11 connected to the manhole 1 or the sizes of the manholes 1 and the vertical pipes 2.

  As shown in FIG. 3, the space 4 between the manhole 1 and the vertical tube 2 is filled with a filler 4. The filler 4 is preferably made of a particulate material that can allow intrusion water (unknown water) in the manhole 1 and may be configured to contain, for example, sand, silica sand, or a water-absorbing polymer. Thereby, it is possible to provide the space 3 with a weight sufficient to resist the buoyancy acting on the bottom of the vertical tube 2, and the effect of preventing the vertical tube 2 from rising can be obtained.

  Here, when the manhole 1 and the vertical tube 2 are provided concentrically, that is, when the vertical tube 2 is erected at the center of the manhole 1, the blade member 5 is provided as a more preferable embodiment. It is possible to use.

  As illustrated in FIG. 4, the outer peripheral surface of the vertical tube 2 may be provided with a blade member 5 that is formed to project outward. The blade member 5 is configured such that a plurality of blade members 5 are equally arranged with respect to a support member 51 formed in an annular shape corresponding to the outer peripheral surface of the vertical tube 2. The support member 51 is fixed to the outer peripheral surface of the vertical tube 2. Further, a sliding means 52 including a roller 521 is provided between the plurality of blade members 5 that are equally arranged. The sliding means 52 is fixed to the support member 51 and is arranged so that the roller 521 can roll on the inner peripheral surface of the manhole 1. Further, the blade member 5 may be provided on the outer peripheral surface of the vertical tube 2 over a plurality of steps in the height direction.

  When the vertical member 2 is constructed in the manhole 1, the blade member 5 is installed along the inner peripheral surface of the manhole 1 together with the vertical tube 2 in the space 3 between the manhole 1 and the vertical tube 2. It is fixed at an appropriate height position. At this time, the roller 521 rolls along the inner peripheral surface of the manhole 1 and can be installed while sliding the vertical tube 2, and the arrangement position of the vertical tube 2 with respect to the manhole 1 is naturally provided in the center. Since it is positioned, it can be easily constructed.

  Such a blade member 5 is embedded in the filler 4 in the space 3 after the vertical tube 2 is installed in the manhole 1. Therefore, the filler 4 is densely filled in the upper and lower surfaces of each blade member 5 in the space portion 3, thereby preventing the blade member 5 from flowing the filler material 4, and the space portion 3 and the filler 4. Can be integrated, and the vertical tube 2 can be more effectively prevented from being pushed up and floated.

  Further, the intermediate hole portion 24 may be disposed opposite to the equal height position of the vertical pipe 2. For example, two intermediate hole portions 24 may be formed opposite to the side tube wall of the upper spiral guide path 21 (see FIG. 7). A hole forming member 25 is also fitted and fixed to these intermediate hole portions 24.

  Due to the installation structure of the vertical pipe 2 with the spiral guide path, even if the filler is liquefied due to an earthquake or the like, the buoyancy acting on the vertical pipe 2 can be resisted by the weight of the space 3. This makes it possible to avoid damage to the pipes connected to the manholes and breakage of the road pavement layer above the manholes.

  Next, the repairing method when the vertical pipe 2 with the spiral guide path employing the installation structure is clogged or the vertical pipe 2 needs to be replaced due to aging will be described with reference to the drawings.

  5 to 7 show a method for repairing a longitudinal pipe with a spiral guide path according to the present invention, FIG. 5 is an explanatory view showing an example of the filler removing step, and FIG. 6 shows another example of the filler removing step. FIG. 7 is an explanatory view showing an example of the vertical tube replacement process.

  When refurbishing the vertical pipe 2, the filler 4 filled in the space 3 is sucked using an appropriate suction means, and the filler 4 is discharged and removed from the space 3 of the manhole 1 (filler removal step). ).

  At this time, when it is possible to cope with partial replacement such as when the vertical tube 2 is clogged, it is not necessary to remove all the filler 4 from the space portion 3, and the updated portion of the vertical tube 2 is exposed. It is also sufficient to remove the filler 4 to the extent that it can be removed. Further, when the vertical pipe 2 is completely replaced, all the filler 4 is removed from the space portion 3.

  In the filler removing process, the filler 4 can be sucked in order from the upper layer portion from above the space portion 3, and the filler 4 can be discharged from the upper opening of the manhole 1. The vertical tube 2 exposed in the manhole 1 by this process is taken out from the manhole 1 in order.

  As shown in FIG. 5, after discharging and removing the filler 4 in the upper layer portion, the upper spiral guide path 21 of the exposed vertical pipe 2 is removed, and the intermediate guide path 22 remaining in the manhole 1 is closed, Subsequently, the procedure proceeds by the procedure of discharging the filler 4 from the upper opening of the manhole 1.

  Such a procedure is repeated, and after the filler 4 and a part of or the entire vertical pipe 2 to be renewed are removed from the manhole 1, it can be repaired by installing a new vertical pipe in the manhole 1 (vertical). Tube replacement process).

  Moreover, the said filler removal process can also advance a filler removal process more efficiently by utilizing the intermediate | middle hole part 24 of the vertical pipe 2. FIG. In this case, as shown in FIG. 6, among the intermediate hole portions 24 provided in the tube wall of the vertical tube 2, the intermediate hole portion 24 at an appropriate height position is selected, and the lid body 254 is removed to close it. The grout hole 251 of the intermediate hole portion 24 that has been opened is opened. Then, the filler 4 in the space 3 is drawn into the vertical pipe 2 through the opened intermediate hole 24, led to the bottom of the vertical pipe 2 through the center of the lower spiral guide path 23 of the vertical pipe 2, and from the outflow pipe 12. It is preferable to discharge out of the manhole 1 by suction. Further, a similar intermediate hole 24 may be provided at the top of the outflow pipe 12 so that the filler 4 is discharged from the grout hole 251.

  For example, when the pipe diameter of the vertical pipe 2 is relatively large and an operator can enter the vertical pipe 2 due to the structure of the spiral guide path, a filler is introduced into the vertical pipe 2 using the intermediate hole portion 24. By guiding and removing 4, removal management of the filler 4 can be easily performed.

  Further, the intermediate hole portions 24, 24 arranged to face the vertical tube 2 can be used for the work of taking out the vertical tube 2. As illustrated in FIG. 7, the lid body 254 is removed from the intermediate hole portions 24, 24 provided in the vertical pipe 2 to open the grout hole 251, and the latching jig 6 such as a lever block is hooked and pulled upward. Thus, the vertical tube 2 can be lifted and taken out from the manhole 1.

  By such a repair method of the vertical pipe 2, the repair work when trouble such as clogging or damage occurs in the vertical pipe 2, or the work of replacing the vertical pipe 2 when the vertical pipe 2 becomes obsolete, the manhole 1 It can be performed relatively easily without destroying the vertical tube 2 and can meet various requirements.

  In addition, the installation structure of the vertical pipe of this invention is not limited to the said embodiment, The filler 4 is filled in the space part 3 of the manhole 1, and the weight resisting the buoyancy which acts on the bottom part of the vertical pipe 2 is used. As long as the structure has a function of preventing the manhole 1 from rising, the form may be any form, and the filler 4 is not limited to the above-described material, and particles that allow intrusion water in the manhole 1 Any material can be applied as long as it is made of a material.

  Further, the vertical pipe repairing method of the present invention is not limited to the above embodiment, and a filler removing step for sucking and removing the filler 4 filled in the space 3 from the manhole 1, Any configuration may be used as long as it includes a vertical tube replacement step in which at least a part of the existing vertical tube 2 exposed in the manhole is taken out of the manhole 1 and replaced with a new vertical tube. However, the above-described effects can be obtained.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a vertical pipe of a spiral guide path type drop shaft installed in a manhole having a high head joint that can flow down the entire amount of sewage in a sewer.

It is explanatory drawing which shows an example of the installation structure of the vertical pipe with a spiral guideway of this invention. It is a perspective view of the hole formation member with which the said vertical pipe is equipped. It is explanatory drawing which shows a mode that a manhole is filled with a filler. It is a cross-sectional view which shows a mode that the blade | wing member was attached to the said vertical pipe. It is explanatory drawing which shows an example of the filler removal process in the repair method of the vertical pipe with a spiral guide path which concerns on this invention. It is explanatory drawing which shows the other example of the filler removal process in this invention. It is explanatory drawing which shows an example of the vertical pipe replacement | exchange process in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manhole 11 Inflow pipe 12 Outflow pipe 2 Vertical pipe 21 Upper spiral guide way 22 Intermediate guide way 23 Lower spiral guide way 24 Intermediate hole part 25 Hole formation member 251 Grout hole 252 Main part 253 Boss part 254 Lid 3 Space part 4 Filling Material 5 Blade member 51 Support member 52 Sliding means 521 Roller 6 Latching jig

Claims (8)

An installation structure of a longitudinal pipe with a spiral guide path provided with a spiral guide path for spirally flowing down the fluid flowing in the manhole,
A space formed between the vertical tube and the inner wall of the manhole is filled with a filler made of a particulate material that allows intrusion water in the manhole, and has a weight that resists buoyancy acting on the vertical tube. An installation structure of a vertical pipe with a spiral guideway characterized by having a vertical pipe floating prevention function.   The installation structure of the vertical pipe with a spiral guide path according to claim 1, wherein the filler includes sand, silica sand, or a water-absorbing polymer.   The longitudinal tube with a spiral guide path according to claim 1 or 2, wherein an intermediate hole portion capable of being closed is provided in a tube wall of the longitudinal tube so as to face the same height position of the longitudinal tube. Installation structure.   The hole forming member having a grout hole is attached to the hole provided in the tube wall of the vertical pipe, and the lid is press-fitted into the hole forming member. The installation structure of the vertical pipe with a spiral guideway as described in 2.   The installation structure of the vertical pipe with a spiral guideway according to any one of claims 1 to 4, wherein a blade member that is extended outward is attached to an outer peripheral surface of the vertical pipe. . It is a repair method for a longitudinal pipe with a spiral guideway provided with a spiral guideway that causes the fluid that has flowed in the manhole to flow down spirally,
For a vertical tube configured to be filled with a filler made of a particulate material capable of allowing intrusion water in the manhole into a space formed between the vertical tube and the inner wall of the manhole, and to have a floating prevention function ,
A filler removing step of sucking and removing the filler filled in the space portion from the manhole, and at least a part of the existing vertical pipe exposed in the manhole by this step is taken out from the manhole and the portion is removed. A method of repairing a vertical pipe with a spiral guide, characterized by comprising a vertical pipe replacement process for replacing the vertical pipe with a new one.   An intermediate hole portion which can be closed is provided in the pipe wall of the vertical pipe, and the filler removing step opens the intermediate hole portion and uses the suction means to fill the space portion with the filler. 7. The method of repairing a vertical pipe with a spiral guide according to claim 6, wherein the vertical pipe is drawn from the intermediate hole into the vertical pipe and discharged through the vertical pipe to the outside of the vertical pipe.   The method of repairing a longitudinal pipe with a spiral guide path according to claim 6, wherein the filler removing step is performed by sucking the filler from above the space portion using a suction means.

Images