JP2016211280A - Connection structure of manhole rehabilitation member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure for a manhole rehabilitation member used for rehabilitating an existing manhole that may be connected readily and maintains water cut-off performance even when a joint between the manhole rehabilitation members opened at a time of earthquake.SOLUTION: A connection structure is for manhole rehabilitation members 1, 2 used for rehabilitating an existing manhole. Rubber packings 45, 46 are fixed respectively on an outer peripheral surface of an upper edge part 1a of the lower manhole rehabilitation member 1 and a lower edge part 2a of the upper manhole rehabilitation member 2. The lower edge part 2a is inserted into a socket formed by fitting a part of a collar member 3 into the top edge part 1a, the collar member having an inner peripheral surface with which the rubber packings 45, 46 come in contact, while being fitted externally on the lower and upper manhole rehabilitation members 1, 2. The rubber packings 45, 46 have two ring-form lip parts 45a, 45b,... that protrude outward in an axial direction leaving an interval. A gap C1 is formed between the ring-form lip parts 45a, 45b,..., while the collar member 3 is fitted externally on the top edge part 1a and the lower edge part 2a.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a connection structure for a human hole rehabilitation member for rehabilitating an existing human hole that has been aged by being installed in an existing human hole.

  Conventionally, when a manhole in sewers or agricultural water has become obsolete, it is widely practiced to rehabilitate existing manholes by connecting a plurality of manhole rehabilitation members vertically and installing them in existing manholes. ing. In such a human-hole rehabilitation member, one of the problems is to maintain the water-stopping property at the connecting portion (seam) between the human-hole rehabilitation members.

  FIG. 10 is an end view for schematically explaining an example of a conventional method for connecting the human hole rehabilitation members 101, 102. In this connection method, as shown in FIG. 10A, first, a joint material 105 such as an epoxy resin is first installed on the upper end surface of the cylindrical lower human hole rehabilitation member 101. Next, a cylindrical collar member 103 having an inner diameter larger than the outer diameter of the human-hole rehabilitation members 101 and 102 and provided with a stopper rib 107 protruding inward in the radial direction from the inner peripheral surface at the axial central portion is provided. As shown by the white arrow in FIG. 10A, the upper end portion of the lower human hole rehabilitation member 101 is put on. In this state, as shown in FIG. 10B, the joint material 105 is further installed on the upper surface of the stopper rib 107. Next, as shown in FIG. 10 (c), the cylindrical upper human hole rehabilitation member 102 is fitted into the collar member 103 from above. At this time, the joint material 105 sticking out between the upper end surface of the lower human hole rehabilitation member 101 and the lower end surface of the upper human hole rehabilitation member 102 is wiped off from the inner side of the human hole rehabilitation members 101 and 102. Thereafter, the joint material 105 is cured, so that the lower human hole rehabilitation member 101 and the upper human hole rehabilitation member 102 are firmly bonded and joined, and the connection portion between the human hole rehabilitation members 101 and 102 is stopped. Will be.

  However, since the joint portion formed by such a connection method has a rigid structure as the joint material 105 is solidified, the joint between the lower human hole rehabilitation member 101 and the upper human hole rehabilitation member 102 at the time of an earthquake or the like. If the opening is opened, there is a problem that the joint material 105 is broken and it becomes difficult to maintain the water-stopping property.

  Here, although not related to the human hole rehabilitation member, for example, in Patent Document 1, in the construction method of the assembly manhole (human hole), the two are fitted to each other at the connection end portions of the paired human hole members. It is disclosed that a concave groove and a ridge are provided, and an open cell sponge impregnated with a soft viscous adhesive is interposed in the gap between the groove and the ridge. According to this Patent Document 1, the open-cell sponge impregnated with the soft viscous adhesive is deformed without harming the sealing performance and water-stopping property, so that it absorbs earthquake vibrations and lateral loads and breaks into the concrete. It is said that it is possible to suppress the occurrence of

JP 2001-336167 A

  However, although the construction method of the above-mentioned patent document 1 can be applied to a human hole member having a relatively thick wall thickness, it can be applied to a human hole rehabilitation member having a relatively thin wall thickness installed inside the human hole. Have difficulty. Temporarily, if the thing of the above-mentioned patent document 1 is applied to a human hole rehabilitation member having a relatively thin wall thickness, for example, it is conceivable to thicken only a part constituting the connection part in the human hole rehabilitation member, In this case, there is a problem that the structure becomes complicated, and the connection work between the rehabilitation members in the limited space in the existing human hole becomes complicated.

  The present invention has been made in view of such a point, and the object of the present invention is to connect human hole rehabilitation members during an earthquake while being easily connected in the connection structure of a human hole rehabilitation member for rehabilitating an existing manhole. It is an object of the present invention to provide a technique for maintaining water stoppage even when an opening occurs at the seam.

  In order to achieve the above object, in the present invention, the human hole rehabilitation member having an elastic member fixed to the outer peripheral surface is a collar member that is externally fitted to the connecting end portion of the human hole rehabilitation member. Relative movement is possible while contacting the inner peripheral surface of the member.

  Specifically, the present invention is directed to a connection structure for a human hole rehabilitation member that renews the existing human hole by being connected to the upper and lower sides and installed in the existing human hole.

  And the connection structure of this human-hole renovation member is that each said human-hole renovation member is formed in the cylindrical shape, and in the said human-hole renovation member mutually connected, it is cyclic | annular in the outer peripheral surface of a mutual connection edge part. The elastic members are fixed to each other, and a part of the cylindrical collar member having an inner diameter such that the elastic member comes into contact with the inner peripheral surface in a state where the elastic member is fitted to the human hole rehabilitation member is phase-connected. The connection end portion of the upper human hole rehabilitation member is inserted into the receiving port formed by fitting to the connection end portion of the lower human hole renovation member in the human rehabilitation member, and each elastic member is And a plurality of annular lip portions that are attached to each of the connection end portions and project outward in the radial direction with an interval in the axial direction. Adjacent to each other in the state of being fitted around each connection end It is characterized in that the gap between the-up portion is formed to produce.

  According to this configuration, the upper human hole having an outer diameter smaller than the inner diameter of the collar member at the receiving port formed by fitting a part of the collar member to the connection end portion of the lower human hole renovating member. Since the connection end portion of the rehabilitation member is inserted, for example, by inserting the lower end portion of the upper human hole rehabilitation member suspended from above, the both human rehabilitation members can be easily connected.

  In addition, the collar member is not fixed to the human hole rehabilitation member, and the connecting end portion is in contact with the elastic member fixed to the outer peripheral surface of the connection end portion of the human hole rehabilitation member. Therefore, the human hole rehabilitation member can be moved relative to the collar member. As a result, even if an opening occurs at the seam between the human hole rehabilitation members during an earthquake, the human hole rehabilitation member moves relative to the collar member while the elastic member contacts the inner peripheral surface of the collar member. Further, it is possible to suppress the breakage of the human hole rehabilitation member while maintaining the water-stopping property.

  However, when the connection of the human hole rehabilitation member is completed, usually, a back material such as mortar is injected between the human hole rehabilitation member and the existing human hole. If the material penetrates into the gap and solidifies, the solidified backing material may act as a vertical stopper for the elastic member. In this way, when the elastic member is restrained from moving, if an opening occurs at the seam between the human hole rehabilitation members during an earthquake, the elastic member peels off from the human hole rehabilitation member (the elastic member and the human hole rehabilitation member). In some cases, it may be difficult to maintain the water-stopping property.

  In this regard, in the present invention, when the seam opens at the time of an earthquake, for example, even if the outermost annular lip part (referred to as the first lip part) peels from the manhole rehabilitation member, Since there is a gap between the adjacent lip part (referred to as the second lip part) and the manhole rehabilitation member moves relative to the collar member up to this gap, an earthquake occurs. The displacement of time can be absorbed. And in this case, while the second lip portion is in contact with the inner peripheral surface of the collar member, the human hole rehabilitation member moves relative to the collar member, so that the waterstop can be maintained, It is possible to suppress earth and sand from flowing into the inside of the manhole rehabilitation member from the outside.

  Further, the present invention is a connection structure of a human hole rehabilitation member for renewing the existing human hole by being connected in a plurality of up and down and installed in the existing human hole, wherein each of the human hole rehabilitation members is a cylinder An annular elastic member is fixed to the outer peripheral surface of each connecting end portion of the human hole rehabilitation member that is formed in a shape and connected to each other, and is externally fitted to the human hole rehabilitation member And fitting a part of the cylindrical collar member having an inner diameter such that the elastic member comes into contact with the inner peripheral surface into the connecting end portion of the lower human hole rehabilitation member of the human hole rehabilitation member connected to each other. The connection end portion of the upper human hole rehabilitation member is inserted into the receptacle formed by the above, and a plurality of the elastic members are attached to the connection end portions with an interval in the axial direction, and the collar In a state where the member is fitted on each connection end, the plurality of elasticity And it is characterized in that it is arranged so that a gap is formed between the wood.

  According to this configuration, when an opening occurs at the seam during an earthquake, for example, even if the edge between the outermost elastic member (referred to as the first elastic member) and the human hole rehabilitation member is cut, the first elastic member and this Since there is a gap between the elastic members adjacent to each other (referred to as the second elastic member), the manhole rehabilitation member moves relative to the collar member up to this gap, and at the time of an earthquake Can be absorbed. Thus, in this case, while the second elastic member is in contact with the inner peripheral surface of the collar member, the human hole rehabilitation member moves relative to the collar member, so that the water stoppage can be maintained. It is possible to suppress earth and sand from flowing into the inside of the manhole rehabilitation member from the outside.

  Furthermore, in the connection structure for the human hole rehabilitation member, stopper ribs protruding inward in the radial direction from the inner peripheral surface are provided at the axial central portion of the collar member, and both end portions of the collar member in the axial direction are provided. Is preferably chamfered in a tapered shape so that the inner diameter increases toward the outer side in the axial direction.

  According to this configuration, the collar member only needs to be fitted to the connection end of the human hole renovation member until the stopper rib contacts the connection end of the human hole renovation member. It is possible to suppress being too deep or too shallow. Thereby, when an opening arises in the joint of human-hole renovation members at the time of an earthquake, it can suppress that a human-hole renovation member slips out from a collar member.

  In addition, since both end portions in the axial direction of the collar member are chamfered in a tapered shape so that the inner diameter becomes larger toward the outer side in the axial direction, in other words, the inner diameter is formed so as to widen toward the end. The connecting end can be easily inserted into the collar member.

  As described above, according to the connection structure of the rehabilitation member according to the present invention, it is easy to connect, but even when an opening occurs at the seam between rehabilitation members at the time of an earthquake, the waterstop performance is maintained. Can do.

It is a figure which shows typically the state which installed the manhole renovation member which concerns on Embodiment 1 of this invention in the existing manhole. It is a figure which shows a manhole rehabilitation member typically, The figure (a) is a cross-sectional view of a lower manhole rehabilitation member, The figure (b) is a longitudinal cross-sectional view of a lower manhole rehabilitation member (C) is a cross-sectional view of the upper human hole rehabilitation member, and (d) is a vertical cross-sectional view of the upper human hole rehabilitation member. It is a figure which shows a color member typically, The figure (a) is a cross-sectional view, The figure (b) is a longitudinal cross-sectional view, The figure (c) is the upper end part of a lower side human hole renovation member It is a figure which shows the state attached to. It is sectional drawing which shows typically the connection part of a lower side and an upper side human hole renovation member, The figure (a) is a figure which shows the state which has not attached the color member, The figure (b) has attached the color member. FIG. It is sectional drawing which shows typically the connection part of a lower side and an upper side human-hole renovation member, The figure (a) is a figure which shows a normal state, The figure (b) produced the seam opening at the time of an earthquake It is a figure which shows a state. It is a figure which illustrates typically the construction procedure of a manhole rehabilitation member. It is a figure which shows the lifting method and connection method of a human-hole rehabilitation member. It is sectional drawing which shows typically the connection part of the lower side and upper side human hole renovation member which concern on Embodiment 2. FIG. It is sectional drawing which shows typically the connection part of a lower side and an upper side human-hole renovation member, The figure (a) is a figure which shows a normal state, The figure (b) produced the seam opening at the time of an earthquake It is a figure which shows a state. It is an end view which illustrates typically an example of the connection method of the conventional human hole renovation member.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Embodiment 1)
-Composition of rehabilitation material-
FIG. 1 is a diagram schematically illustrating a state in which the human hole renovation members 1 and 2 according to the present embodiment are installed in an existing human hole 10. FIG. 2 is a diagram schematically showing the human hole rehabilitation members 1 and 2, in which FIG. 2 (a) is a cross-sectional view of the lower human hole rehabilitation member 1, and FIG. 2 (b) is the lower human hole. It is the longitudinal cross-sectional view of the rehabilitation member 1, the figure (c) is a cross-sectional view of the upper side human hole renovation member 2, and the figure (d) is the longitudinal cross-sectional view of the upper side human hole rehabilitation member 2. 3A and 3B are diagrams schematically showing the collar member 3, in which FIG. 3A is a transverse sectional view, FIG. 3B is a longitudinal sectional view, and FIG. 3C is a lower human hole. It is a figure which shows the state attached to the upper end part 1a of the rehabilitation member. FIG. 4 is a cross-sectional view schematically showing a connection portion between the lower and upper human hole rehabilitation members 1 and 2 according to this embodiment, and FIG. 4A shows a state in which the collar member 3 is not attached. FIG. 5B is a diagram showing a state in which the collar member 3 is attached. In FIG. 1, FIG. 2 (b), FIG. 2 (d), FIG. 3 (b) and FIG. 2 and only the left half of the collar member 3 are shown in a sectional view. Further, in FIG. 4, the thickness of the lower and upper manhole renewal members 1, 2, the length and thickness of the collar member 3, and the size of the rubber packings 45, 46 are exaggerated to make the drawing easier to see. Show. Furthermore, below, description and illustration of the raising / lowering step provided in the lower and upper human hole renovation members 1 and 2 are omitted.

  As shown in FIG. 1, the lower and upper side human hole rehabilitation members 1 and 2, after excavating the ground around the existing human hole 10 and removing the human hole cover 12 and the inclined wall portion 11, a crane (not shown) The old manhole 10 is rehabilitated by being suspended in the existing manhole 10 and installed. More specifically, after the lower and upper human hole renovation members 1 and 2 are connected to each other in the existing man hole 10 via the collar member 3, the outer peripheral surface and the inner peripheral surface of the existing human hole 10 are connected. By being filled with the backing material 4 in between, it is integrated with the existing man hole 10 to form a new inner wall portion in the existing man hole 10.

  The lower human hole rehabilitation member (first human hole rehabilitation member) 1 is, for example, a resin concrete pipe (Eslon RCP manufactured by Sekisui Chemical Co., Ltd.) made of reinforced fiber plastic mortar (FRPM). As shown in FIGS. 2A and 2B, it is formed in a cylindrical shape. On the outer peripheral surface of the upper end portion (connection end portion) 1a of the lower side human hole rehabilitation member 1, as shown in FIG. 4A, one annular rubber packing (elastic member) 45 is, for example, an epoxy resin type. The entire periphery is bonded and fixed by an adhesive. In addition, the rubber packing 45 is arrange | positioned so that the upper end and the upper end of the lower side human hole renovation member 1 may become flush.

  As shown in FIG. 4A, the rubber packing 45 is formed with first and second annular lip portions 45a and 45b that protrude radially outwardly with an interval in the axial direction. As shown in FIG. 4B, the first and second annular lip portions 45a and 45b are formed in the collar member 3 in a state where the collar member 3 to be described later is externally fitted to the lower human hole rehabilitation member 1. A gap C1 is formed between the first and second annular lip portions 45a and 45b adjacent to each other while contacting the peripheral surface. In other words, even if the first and second annular lip portions 45a and 45b are compressed and deformed by externally fitting the collar member 3 to the lower side human hole rehabilitation member 1, the gap between the two is not completely closed. Is formed in such a shape and dimensions as to remain.

  On the other hand, the upper human hole rehabilitation member (second human hole rehabilitation member) 2 is a resin concrete pipe made of, for example, a reinforced fiber plastic mortar, similar to the lower human hole rehabilitation member 1, and FIGS. 2 (c) and 2 (d). As shown in FIG. The upper human hole rehabilitation member 2 is formed longer than the lower human hole rehabilitation member 1, but has the same inner diameter and the same outer diameter as the lower human hole rehabilitation member 1. On the outer peripheral surface of the lower end portion (connection end portion) 2a of the upper side human hole rehabilitation member 2, as shown in FIG. 4A, one ring-shaped rubber packing (elastic member) 46 extends over the entire circumference. Bonded and fixed. The rubber packing 46 is disposed such that its lower end is positioned slightly higher than the lower end of the upper human hole rehabilitation member 2.

  The rubber packing 46 is formed in the same shape and size as the rubber packing 45. That is, the rubber packing 46 is also formed with first and second annular lip portions 46a and 46b that protrude radially outward with an interval in the axial direction. The first and second annular lip portions 46a and 46b are also in contact with the inner peripheral surface of the collar member 3 in a state where the collar member 3 is externally fitted to the upper manhole rehabilitation member 2, and the first and second annular lip portions 46a and 46b are adjacent to each other. Further, a gap C1 is formed between the second annular lip portions 46a and 46b.

  The collar member 3 is made of, for example, a metal such as stainless steel or reinforced fiber plastic (FRP (Fiberglass Reinforced Plastic)), and is formed in a cylindrical shape as shown in FIGS. In the collar member 3, the first and second annular lip portions 45 a, 46 a, 45 b, 46 b of the rubber packings 45, 46 are arranged on the inner peripheral surface while being fitted on the lower and upper human hole renovation members 1, 2. It has an inner diameter so as to come into contact with. In other words, the collar member 3 has an inner diameter that is larger than the outer diameters of the lower and upper human hole rehabilitation members 1 and 2 and smaller than the outer diameters of the rubber packings 45 and 46. Further, as shown in FIGS. 3A and 3B, a rectangular stopper rib 7 projecting radially inward from the inner peripheral surface is provided at the central portion in the axial direction of the collar member 3 by 90 ° in the circumferential direction. Four pitches are provided. Further, both end portions of the collar member 3 in the axial direction are chamfered in a tapered shape so that the inner diameter increases (thickness decreases) toward the outer side in the axial direction.

-Connection structure for rehabilitation material-
As shown in FIG. 3C, the collar member 3 configured in this way has a part (a part below the stopper rib 7) of the upper end portion 1 a of the lower human hole rehabilitation member 1 as shown in FIG. It is carried into the construction site etc. in the state fitted in. The end of the collar member 3 is chamfered in a tapered shape so that the inner diameter increases toward the outer side in the axial direction. In other words, the end of the collar member 3 is formed so that the inner diameter becomes wider. The upper end portion 1 a of the side human hole rehabilitation member 1 can be easily inserted into the collar member 3. Further, the collar member 3 is fitted into the upper end portion 1 a of the lower human hole rehabilitation member 1 until the stopper rib 7 contacts the upper end of the lower human hole rehabilitation member 1, thereby lowering the lower human hole rehabilitation member 1 with respect to the collar member 3. The insertion depth can be suppressed from being too deep or too shallow.

  In this way, by inserting a part of the collar member 3 into the upper end 1a of the lower human hole rehabilitation member 1, the lower human hole rehabilitation member 1 is inserted with the lower end 2a of the upper human hole rehabilitation member 2. The receptacle 8 that can be used is formed. Then, the lower human hole rehabilitation member 1 is installed in the existing human hole 10 so that the receiving port 8 is on the upper side, and the upper human hole rehabilitation member 2 is suspended in the existing human hole 10 by a crane or the like. By inserting the lower end 2 a into the receiving port 8, the lower human hole rehabilitation member 1 and the upper human hole rehabilitation member 2 can be connected vertically within the existing human hole 10.

  As described above, the lower end of the rubber packing 46 is slightly higher than the lower end of the upper human hole rehabilitation member 2 (in other words, the insertion resistance at the lower end of the upper human hole rehabilitation member 2 is small); Combined with the fact that the inner diameter of the end portion of the collar member 3 is formed so as to widen toward the end, the lower end portion 2a of the upper human hole rehabilitation member 2 can be more easily inserted through the receiving port 8.

  FIG. 5 is a cross-sectional view schematically showing a connection portion between the lower and upper manhole rehabilitation members 1 and 2, in which FIG. 5A is a diagram showing a normal state, and FIG. It is a figure which shows the state which the opening produced in the seam sometimes. As shown in FIG. 5A, in the state where the lower human hole rehabilitation member 1 and the upper human hole rehabilitation member 2 are connected vertically via the collar member 3, the first and second rubber packings 45 and 46 are provided. Since the two annular lip portions 45a, 46a, 45b, 46b are in contact with the inner peripheral surface of the collar member 3, the inner side and the outer side of the human-hole rehabilitation members 1, 2 are blocked. Accordingly, even if sewage or agricultural water leaks from between the upper end of the lower manhole rehabilitation member 1 and the lower end of the upper manhole rehabilitation member 2, the rubber packing 45, 46 and the collar member 3 stop the water. Therefore, it is possible to reliably suppress sewage and agricultural water from leaking out from the connecting portion of the human hole rehabilitation members 1 and 2. In addition, it is possible to suppress earth and sand from flowing into the inside of the human hole renovation members 1 and 2 from the outside.

  Further, the collar member 3 is not fixed with respect to the lower and upper side human hole renewal members 1 and 2, and the lower side human hole renewal member 1 is in a state where its inner peripheral surface is in contact with the rubber packings 45 and 46. The lower and upper human hole rehabilitation members 1 and 2 can be moved relative to the collar member 3 because they are only fitted on the upper end 1a and the lower end 2a of the upper human hole rehabilitation member 2.

  By the way, when the backing material 4 is injected between the human hole rehabilitation members 1 and 2 and the existing human hole 10, as shown in FIG. When entering into the gap between the rehabilitation members 1 and 2 and solidifying, the solidified backing material 4 may act as a vertical stopper with respect to the first annular lip portions 45a and 46a. In this way, with the movement of the first annular lip portions 45a, 46a being suppressed, an opening occurs at the joint between the lower and upper human rehabilitation members 1 and 2 at the time of an earthquake, for example, the upper human rehabilitation member 2 Is displaced upward, the first annular lip portion 46a may be peeled off from the upper human hole rehabilitation member 2 (the edge between the first annular lip portion 46a and the upper human hole rehabilitation member 2 may be cut).

  However, in the present embodiment, since there is a gap C1 between the first annular lip portion 46a and the second annular lip portion 46b, even when the first annular lip portion 46a is peeled off from the upper human hole rehabilitation member 2. As shown in FIG. 5 (b), with the gap C 1 as a limit, the upper human lip regeneration member 2 is in contact with the collar member 3 while the second annular lip portion 46 b is in contact with the inner peripheral surface of the collar member 3. Relative movement is possible. Thereby, even when an opening occurs at the joint between the human rehabilitation members 1 and 2 at the time of an earthquake, it is possible to prevent the lower and upper human rehabilitation members 1 and 2 from being damaged. Moreover, the upper human hole rehabilitation member 2 moves relative to the collar member 3 while the second annular lip portion 46b is in contact with the inner peripheral surface of the collar member 3, so that the water-stopping property can be maintained even during an earthquake. In addition, it is possible to prevent earth and sand from flowing into the inside of the human hole renovation members 1 and 2 from the outside.

-Construction method for human rehabilitation members-
Next, the construction method of the human hole rehabilitation members 1 and 2 will be described with reference to FIGS. 1, 6 and 7.

(1) Preliminary survey In the preliminary survey, (1-1) the surrounding environment (for example, whether the work area can be secured), (1-2) the flow condition (for example, whether the workable water level), (1-3) malignant Is the construction possible by checking the effects of gas (for example, the possibility of oxygen deficiency and ventilation), (1-4) the current state of the existing manhole 10 (whether it is corrosion enough to withstand the work), etc. Judgment is made comprehensively.

(2) Excavation and partial removal of existing manholes When it is judged that construction is possible in the preliminary survey, the ground around the existing manhole 10 is excavated as shown in FIG. The part 11 is exposed. Thereafter, the slanted wall portion 11 and the manhole cover 12 which hinder the suspension of the manhole rehabilitation members 1 and 2 are removed.

(3) Pretreatment After removing the inclined wall portion 11 and the manhole cover 12, the existing manhole 10 is subjected to high-pressure washing or the like, and the portion that has been corroded and softened by hydrogen sulfide or the like is removed. Next, a leg hardware (not shown) that hinders the suspension and installation of the human-hole rehabilitation members 1 and 2 is removed. Moreover, the part 13a shown with the oblique line of Fig.6 (a) in the existing invert concrete 13 is ground so that the ground contact surface which installs the lower side human hole renovation member 1 may become horizontal. Then, after the grinding of the existing invert concrete 13 is finished, the height of the existing manhole 10 is measured. Specifically, in the existing manhole 10, the height from the lowermost end where the lower humanhole rehabilitation member 1 is installed to the uppermost end of the straight wall portion of the existing manhole 10 (corresponding to the lower end of the inclined wall portion 11). measure.

(4) Pre-processing of human hole rehabilitation member When the lower and upper human hole rehabilitation members 1 and 2 are installed in the existing human hole 10, the upper end of the upper human hole rehabilitation member 2 is the straight wall portion of the existing human hole 10. Based on the height of the existing human hole 10 measured by the pre-processing, the height of the human hole rehabilitation members 1 and 2 is adjusted so as to be about 20 mm lower than the uppermost end. As described above, the upper end of the upper human hole rehabilitation member 2 is made lower by about 20 mm than the uppermost end of the straight wall portion of the existing human hole 10 because the lower end of the inclined wall portion 15 (see FIG. 6D) after restoration. This is to secure an installation space for the seal material 17 (see FIG. 1) installed between the upper end of the upper human hole rehabilitation member 2 and the upper end of the upper human hole rehabilitation member 2. In addition, the height adjustment of the human hole rehabilitation members 1 and 2 is mainly performed by cutting the upper end portion of the upper human hole rehabilitation member 2 using a disc grinder (not shown) or the like.

  Further, in order to connect the lower human hole rehabilitation member 1 and the existing pipe 14, the lower end portion of the lower human hole rehabilitation member 1 is cut with a disc grinder or the like in accordance with the existing flow path. An elliptical pipe connection port 1c is formed.

(5) Installation of human hole rehabilitation member When the above preparation is completed, the lower human hole rehabilitation member 1 with the collar member 3 attached to the upper end 1a is connected to the wire rope 20 as shown in FIG. 6 (b). And suspended in the existing manhole 10 by a crane. At this time, the lower human hole rehabilitation member 1 is positioned so that the position of the pipe connection port 1c is a position corresponding to the existing pipe 14.

  When the lower human hole rehabilitation member 1 is hung using the wire rope 20, the hanging jig 21 can be fixed from the inside of the lower human hole rehabilitation member 1 as shown in FIG. The insert member 25 is inserted into the through hole 1 b formed in the lower human hole rehabilitation member 1 from the outside of the lower human hole rehabilitation member 1. More specifically, the hanging jig 21 includes a mounting plate 22 in which a through hole is formed, a hanging bracket 23 fixed to the mounting plate 22, and a shackle 24 that is passed through the through hole formed in the hanging bracket 23. And. The insert member 25 is a female screw with a washer, and the female screw part is formed in the lower human hole rehabilitation member 1 with the washer part in contact with the outer peripheral surface of the lower human hole rehabilitation member 1. Inserted from the outside. The hanging jig 21 is fixed to the lower human hole rehabilitation member 1 from the inside by screwing an eyebolt 26 inserted into the through hole of the mounting plate 22 into the female screw of the insert member 25. By connecting the shackle 24 and the wire rope 20 of the suspension jig 21 fixed to the lower human hole rehabilitation member 1 from the inside, the lower human hole rehabilitation member 1 can be safely suspended. It has become.

  In this way, by adopting a configuration in which the hanging jig 21 can be fixed from the inside of the lower human hole rehabilitation member 1, the hanging jig 21 is placed inside the lower human hole rehabilitation member 1 after the work is completed. It can be easily removed from the work. As will be described later, the hanging jig 21 and the wire rope 20 are used when the upper human hole rehabilitation member 2 is pulled into the receiving port 8, so that the hanging jig 21 and the wire rope 20 are attached to the lower human hole rehabilitation member 1 even after the suspension work is finished. Leave it alone.

  When the installation of the lower manhole renovation member 1 is completed, the upper manhole renovation member 2 is suspended in the existing manhole 10 by the crane via the wire rope 30 as shown in FIG. Then, after aligning the axis of the lower human hole rehabilitation member 1 and the axis of the upper human hole rehabilitation member 2 previously installed, the lower end 2a of the upper human hole rehabilitation member 2 is inserted into the receiving port 8 Then, it is temporarily installed while being suspended by the crane via the wire rope 30.

  When suspending the upper manhole rehabilitation member 2 using the wire rope 30, as shown in FIG. 7B, an insert member capable of fixing the hanging jig 31 from the inside of the upper manhole rehabilitation member 2. 36 is inserted into the through-hole 2b formed in the upper human hole rehabilitation member 2 from the outside of the upper human hole rehabilitation member 2. More specifically, the hanging jig 31 includes a mounting plate 32 in which a through hole is formed, a pair of hanging brackets 33 that are fixed to the mounting plate 32 and that are opposed to each other in the horizontal direction, and upper and lower portions formed on the hanging bracket 33. The upper pin 34 and the lower pin 35 are respectively passed through the through holes. The insert member 36 is a female screw with a washer, and the female screw part is outside the through hole 2b formed in the upper human hole renovation member 2 with the washer part in contact with the outer peripheral surface of the upper human hole renovation member 2. Is inserted from. The hanging jig 31 is fixed to the upper side human hole rehabilitation member 2 from the inside by screwing a bolt 37 inserted into the through hole of the mounting plate 32 into the female screw of the insert member 36. By connecting the upper pin 34 of the lifting jig 31 fixed to the upper side human hole rehabilitation member 2 from the inside and the wire rope 30, the upper side human hole rehabilitation member 2 can be safely suspended. It has become.

  By the way, as described above, the rubber packing 6 is formed so that the lower end is slightly higher than the lower end of the upper human hole rehabilitation member 2 and the inner diameter of the end portion of the collar member 3 is widened toward the end. In combination with this, the lower end portion 2 a of the upper side human hole rehabilitation member 2 is easily inserted into the receiving port 8. However, if only the lower end 2a of the upper human hole rehabilitation member 2 is suspended from the receiving port 8, the lower end 2a of the upper human hole rehabilitation member 2 is prevented from inserting against the rubber packing 6 until it hits the stopper rib 7. 3 is difficult to insert.

  Therefore, in the present embodiment, as shown in FIGS. 7A to 7C, the upper human hole rehabilitation member 2 is drawn into the collar member 3 using a lever block (registered trademark) 40. Specifically, as shown in FIG. 7 (b), the upper hook 41 of the lever block 40 is hooked on the lower pin 35 of the hanging jig 31, and as shown in FIG. The lower hook 42 is connected to the wire rope 20 that is left connected to the hanging jig 21. Then, as shown in FIG. 7 (a), while taking the reaction force from the lower human hole rehabilitation member 1, the lever member 40 is used to bring the upper human hole rehabilitation member 2 into the collar member 3 until it hits the stopper rib 7. Pull in. After completion of the pull-in operation, the lever block 40, the hanging jig 21, the wire rope 20, the hanging jig 31 and the wire rope 30 are removed from the human hole renovation members 1 and 2.

(6) Backing material injection Prior to injecting the backing material 4 such as mortar between the lower and upper side human hole renewal members 1 and 2 and the existing human hole 10, the backing material is introduced from the pipe connection port 1c. In order not to flow out, the peripheral edge portion of the pipe connection port 1c is packed using a water-stopping material 18 (for example, viscosity mortar) (see FIG. 6D).

  After the filling of the water blocking material 18 is completed, the backing material 4 is injected between the lower and upper human hole renovation members 1 and 2 and the existing human hole 10. At this time, in order to fix the lower and upper side human hole renovation members 1 and 2 to the existing human hole 10, a viscosity mortar or the like is provided between the lower and upper side human hole renovation members 1 and 2 and the existing human hole 10. It is preferable to sandwich the spacer.

(7) Invert Concrete Restoration The existing invert concrete 13 ground to install the lower human hole rehabilitation member 1 is repaired. Specifically, concrete is placed so as to embed the lower end portion of the lower manhole rehabilitation member 1, and the inclination is adjusted to restore the original shape.

(8) Upper finishing The sealing material 17 is installed in the upper end part of the upper side human hole renovation member 2 so that the upper end of the straight wall part of the existing human hole 10 and the upper end of the upper side human hole renovation member 2 may become the same height. (See FIG. 6D). In addition, as the sealing material 17, for example, eslon draintite manufactured by Sekisui Chemical Co., Ltd., which is a sewer bonding agent, can be used. Also, female threads of the insert member 25 and the insert member 36 are filled with eslon drain tights.

(9) Reconstruction of the inclined wall portion After confirming that the mortar (backing material 4) has hardened, a new inclined wall portion 15 and a manhole cover 16 are installed at the upper end of the existing manhole 10 using a crane. .

(10) Road surface restoration After the inclined wall portion 15 and the manhole cover 16 are installed, the ground around the existing manhole 10 excavated is refilled. Then, pavement etc. are performed as needed, a road surface is restored, and as shown in FIG.6 (d), construction of the manhole renovation members 1 and 2 is completed.

(Embodiment 2)
This embodiment is different from the first embodiment in the number of rubber packings 55, 56, 65, 66 that are bonded and fixed to the lower and upper human hole rehabilitation members 1, 2. Hereinafter, a description will be given focusing on differences from the first embodiment.

  FIG. 8 is a cross-sectional view schematically showing a connection portion between the lower and upper human hole rehabilitation members 1 and 2 according to the present embodiment. In FIG. 8, in order to make the drawing easier to see, the thicknesses of the lower and upper human hole renewal members 1 and 2, the length and thickness of the collar member 3, and the sizes of the rubber packings 55, 56, 65, and 66 are shown. Is exaggerated.

  As shown in FIG. 8, annular first and second rubber packings (elastic members) 55 and 65 are formed on the outer peripheral surface of the upper end portion 1 a of the lower human hole rehabilitation member 1 by, for example, an epoxy resin adhesive. Each of them is bonded and fixed over the entire circumference. The second rubber packing 65 is arranged so that the upper end thereof is flush with the upper end of the lower human hole rehabilitation member 1.

  As shown in FIG. 8, the first and second rubber packings 55 and 65 are in contact with the inner peripheral surface of the collar member 3 in a state in which the collar member 3 is externally fitted to the lower human hole rehabilitation member 1. At the same time, the first rubber packing 55 and the second rubber packing 65 are spaced apart in the axial direction so that a gap C2 is generated.

  Similarly, annular first and second rubber packings (elastic members) 56 and 66 are bonded and fixed to the outer peripheral surface of the lower end portion 2a of the upper human hole rehabilitation member 2 over the entire circumference. The second rubber packing 66 is disposed such that the lower end thereof is positioned slightly higher than the lower end of the upper human hole rehabilitation member 2. As shown in FIG. 8, these first and second rubber packings 56 and 66 are also in contact with the inner peripheral surface of the collar member 3 in a state where the collar member 3 is externally fitted to the upper human hole rehabilitation member 2. The first rubber packing 56 and the second rubber packing 66 are arranged with an interval in the axial direction so that a gap C2 is generated.

  FIG. 9 is a cross-sectional view schematically showing a connection portion between the lower and upper side human hole rehabilitation members 1 and 2, in which FIG. 9A is a diagram showing a normal state, and FIG. It is a figure which shows the state which the opening produced in the seam sometimes. When the backing material 4 is injected between the manhole rehabilitation members 1 and 2 and the existing manhole 10, as shown in FIG. 9A, the backing material 4 becomes the collar member 3 and the manhole renovation members 1 and 2. , The solidified backing material 4 may act as a stopper in the vertical direction with respect to the first rubber packings 55 and 56. In this way, with the movement of the first rubber packings 55 and 56 being suppressed, an opening occurs at the joint between the lower and upper human rehabilitation members 1 and 2 at the time of an earthquake. When displaced upward, the first rubber packing 56 may be peeled off from the upper human hole rehabilitation member 2 (the edge between the first rubber packing 56 and the upper human hole rehabilitation member 2 may be cut).

  However, in the present embodiment, since the gap C2 exists between the first rubber packing 56 and the second rubber packing 66, even when the first rubber packing 56 is peeled from the upper side human hole rehabilitation member 2, FIG. As shown in (b), the upper human hole rehabilitation member 2 moves relative to the collar member 3 while the second rubber packing 66 is in contact with the inner peripheral surface of the collar member 3 with the gap C2 as a limit. Is possible. Therefore, it is possible to keep the waterstop while absorbing the displacement at the time of the earthquake and to suppress the inflow of earth and sand from the outside into the inside of the human hole renovation members 1 and 2.

(Other embodiments)
The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  In each of the above embodiments, the existing human hole 10 is rehabilitated by the lower and upper human hole renewal members 1 and 2, but not limited to this, three or more human hole rehabilitation members are connected to each other in the vertical direction. The human hole 10 may be rehabilitated.

  In the first embodiment, the rubber packing 45 (or the rubber packing 46) in which the two annular lip portions 45a and 45b (or the annular lip portions 46a and 46b) are formed is used. You may use the rubber packing in which the annular lip | rip part was formed.

  Furthermore, in the said Embodiment 2, two rubber packings 55 and 65 (or rubber packings 56 and 66) are carried out to the upper end part 1a (or lower end part 2a of the upper side human hole renovation member 2) of the lower side human hole renovation member 1. Although bonded and fixed, the present invention is not limited to this, and three or more rubber packings may be bonded and fixed.

  Moreover, in each said embodiment, although the case where the upper side human hole renovation member 2 was displaced upward at the time of an earthquake was demonstrated, not only this but the case where the lower side human rehabilitation member 1 is displaced below at the time of an earthquake, Exactly the same, it is possible to keep the waterstop while absorbing the displacement at the time of the earthquake, and to suppress the inflow of earth and sand etc. into the inside of the manhole rehabilitation members 1 and 2 from the outside.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  According to the present invention, it is possible to maintain water-stopping performance even when an opening occurs at the seam between human hole rehabilitation members during an earthquake while being easy to connect. It is extremely useful when applied to a connection structure.

1 Lower human hole rehabilitation member 1a Upper end (connection end)
2 Upper human hole rehabilitation member 2a Lower end (connection end)
3 Color members 45, 46 Rubber packing (elastic member)
7 Stopper rib 8 Receiving port 10 Existing human holes 45a, 46a First annular lip portions 45b, 46b Second annular lip portions 55, 56 First rubber packing (elastic member)
65, 66 Second rubber packing (elastic member)
C1, C2 clearance

Claims (3)

It is a connection structure of a human hole rehabilitation member that renews the existing human hole by being connected in the upper and lower sides and installed in the existing human hole,
Each of the human hole rehabilitation members is formed in a cylindrical shape, and in the human hole rehabilitation members to be connected to each other, annular elastic members are respectively fixed to the outer peripheral surfaces of the connection ends.
A part of the cylindrical collar member having an inner diameter such that the elastic member comes into contact with the inner peripheral surface in a state where the elastic member is externally fitted to the human hole rehabilitation member, The connection end of the upper human hole rehabilitation member is inserted into the receptacle formed by fitting the connection end of the human hole rehabilitation member,
Each of the elastic members is attached to each of the connection end portions, and has a plurality of annular lip portions projecting radially outward at intervals in the axial direction.
The annular lip portion is formed so that a gap is formed between the annular lip portions adjacent to each other in a state where the collar member is externally fitted to the connection end portions. Member connection structure. It is a connection structure of a human hole rehabilitation member that renews the existing human hole by being connected in the upper and lower sides and installed in the existing human hole,
Each of the human hole rehabilitation members is formed in a cylindrical shape, and in the human hole rehabilitation members to be connected to each other, annular elastic members are respectively fixed to the outer peripheral surfaces of the connection ends.
A part of the cylindrical collar member having an inner diameter such that the elastic member comes into contact with the inner peripheral surface in a state where the elastic member is externally fitted to the human hole rehabilitation member, The connection end of the upper human hole rehabilitation member is inserted into the receptacle formed by fitting the connection end of the human hole rehabilitation member,
A plurality of the elastic members are attached to the connection end portions with an interval in the axial direction, and the collar member is externally fitted to the connection end portions. It is arrange | positioned so that may arise, The connection structure of the human-hole renovation member characterized by the above-mentioned. In the connection structure of the human-hole rehabilitation member according to claim 1 or 2,
A stopper rib protruding radially inward from the inner peripheral surface is provided at the axial center of the collar member,
Both ends of the collar member in the axial direction are tapered and chamfered so that the inner diameter increases toward the outer side in the axial direction.

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