JP2010265683A - Underground structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underground structure which can easily and swiftly recover a water stopping structure at a joint between structure frames even when the water stopping function of a flexible water stop joint is damaged caused by unexpected soil deformation or disasters. <P>SOLUTION: The underground structure 1 is provided with a plurality of structure frames 10 buried in a ground G and the flexible water stop joint 22 placed across the joint between structure frames 10 adjacent to each other. The flexible water stop joint 22 is placed inside a groove-like space 21 provided on a tunnel N side of a boundary section of both structure frames 10. An installing space 24 for emergency water stop joint which is installed afterwards in a way that it envelopes the flexible water stop joint 22 is secured inside the groove-like space 21. An installing section 13 to be used when installing the emergency water stop joint is formed on an end of each structure frame 10 facing the groove-like space 21. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an underground structure having a water stop structure.

  An underground structure constructed by connecting a plurality of skeletons (for example, box culverts, segment rings, propulsion pipes, etc.) and having a flexible waterproof joint at the joint between the skeletons. It is known (see, for example, Patent Document 1).

  This type of flexible waterproof joint has sufficient flexibility (follow-up performance), but if unexpected ground deformation occurs in the surrounding ground of an underground structure due to an earthquake or ground subsidence, There are cases in which the amount of opening or deviation is larger than expected and the water stop function is impaired. When repairing a flexible water-stopping joint to restore the water-stopping function, it is necessary to remove the flexible water-stopping joint provided between the housings. Since there is concern about the inflow of groundwater and earth and sand into the object, it is necessary to improve the ground from the ground or from inside the shaft with respect to the ground around the flexible waterproof joint.

JP 2004-353225 A

  However, for example, if the underground structure is built at a deep depth or if the work site cannot be secured on the ground, it will be difficult to improve the ground from the ground, leading to prolonged repair work and the cost of repair. It will increase. In addition, there is a case where the ground improvement cannot be performed on a portion that is hidden behind the underground structure (for example, the ground below the underground structure).

  In addition, the above-mentioned problem applies similarly when the water stop function of a flexible water stop joint is impaired by an unexpected fire or the like.

  From such a point of view, the present invention is an underground structure in which a plurality of frames are continuously connected via a flexible waterproof joint, and the flexible waterproof joint is caused by unexpected ground deformation or disaster. It is an object of the present invention to provide an underground structure capable of easily and quickly recovering the water stop at the joint between the frames even when the water stop function is impaired.

The present invention that solves such a problem is an underground structure comprising a plurality of housings embedded in the ground, and a flexible water-stopping joint disposed so as to straddle the joints between the adjacent housings. The flexible waterproof joint is disposed in a groove-like space provided on the inner space side of the boundary portion between the two casings, and covers the flexible waterproof joint in the boundary portion. The installation space of the emergency water stop joint to be retrofitted so as to be hidden is secured.
Moreover, the attachment part used when attaching the said emergency stop joint may be formed in the edge part of each said housing which faces the said groove-shaped space.

  According to the present invention, the emergency water-stopping joint is arranged in the installation space secured in the boundary portion, and the inside of the flexible water-stopping joint (the housing is simply attached to the mounting portion formed at the end of each housing. As a new water stop structure can be formed on the inner air side of the joint, even if the water stop function of the flexible water stop joint is impaired due to unexpected ground deformation or disaster, Can be recovered easily and quickly.

  In addition, if a groove-like work space is formed on the side surface of the mounting portion, the underground structure can be used even if the underground section of the underground structure is narrow due to wiring, piping, etc. in the underground structure. It is possible to secure a work space for performing a water stop treatment in an emergency.

Although there is no restriction | limiting in the structure of an attaching part, It is good to provide the screw component fixed to the said housing. If screw parts (for example, insert nuts, anchor bolts, etc.) are provided in the mounting part, the emergency water-stop joint can be fixed to the mounting part by tightening the screws. It becomes possible to carry out more simply and quickly.
Also, if the outer frame plate installed in the groove-shaped space is equipped with screw parts, it can be fixed to the concrete of the frame by screw fastening, so the groove-shaped outer frame plate peels off due to deformation of the water stop joint Can be prevented.

  A plurality of installation spaces may be secured in the groove-shaped space, and the attachment portions may be formed in a plurality of stages at the ends of the housings facing the groove-shaped space. In this case, after the emergency water-stopping joint is installed, unexpected ground deformation or the like exceeding its deformation performance occurs, and the water-stopping function of the emergency water-stopping joint is impaired. However, a new water-stop structure can be formed simply by attaching a new water-stop joint inside the emergency water-stop joint (inside of the housing). It becomes possible to quickly and easily recover the water stop of the part.

  In each of the wide part and the narrow part formed in the groove-like space, the installation space is secured, and the end part of each casing facing the wide part and the end part of each casing facing the narrow part, respectively. The attachment portion may be formed. In this case, the wide portion is formed in the opening portion of the groove-like space, and the narrow portion is formed at a position deeper than the wide portion. If it does in this way, since a space wider than a narrow part will be secured in a position shallower than a narrow part, installation work to a narrow part of an emergency water stop joint will become easy.

  Moreover, you may make the opening width of the said groove-shaped space larger than the width | variety of the bottom part of the said groove-shaped space. This also facilitates the installation work of the emergency water stop joint.

  You may arrange | position the water stop member which stops the joint of the said housings on the ground side rather than the said flexible water stop joint. If it does in this way, since a double water stop structure will be formed by a water stop member and a flexible water stop joint, while a water stop member is functioning normally, it will leak water into a housing. Without it, it becomes possible to repair or replace the flexible waterproof joint.

  If the water stop member is made of a tube material that can be expanded and contracted, the water stop function can be maintained by inflating the water stop member even when the casings are separated from each other.

  Alternatively, a drain pipe that is embedded in the housing and communicates between the inside of the housing and the water-stopping member and the flexible water-stopping joint between the housings may be provided. As a result, when the water-stopping member, the flexible water-stopping joint, or the like is damaged, the water flowing in from the joint portion between the casings is pulled out from the drain pipe by the damage of the water-stopping member and the flexible water-stopping joint. This makes it possible to repair the flexible water-stopping joint, install an emergency water-stopping joint, and the like, and restore the water-stopping structure.

  According to the present invention, even when the water stop structure constructed at the joint portion between the frames is damaged due to unexpected ground deformation or disaster, the water stop at the joint portion can be easily and quickly performed. It becomes possible to recover.

It is a perspective view which shows the underground structure based on suitable embodiment of this invention. It is sectional drawing which shows the water stop structure which concerns on 1st Embodiment. It is an expanded sectional view which shows a part of water stop structure of FIG. (A) And (b) is sectional drawing which shows the repair condition of the water stop structure of FIG. It is sectional drawing which shows the water stop structure which concerns on 2nd Embodiment. FIG. 6 is an enlarged cross-sectional view showing a part of the water stop structure of FIG. 5. It is sectional drawing which shows the water stop structure which concerns on 3rd Embodiment. (A) thru | or (d) is a figure which shows the repair condition of the water stop structure of FIG. It is sectional drawing which shows the water stop structure which concerns on 4th Embodiment. (A) is sectional drawing which shows the water stop structure which concerns on 5th Embodiment, (b) is sectional drawing which shows the repair condition of the water stop structure of (a). (A) is sectional drawing which shows the water stop structure which concerns on 6th Embodiment, (b) And (c) is sectional drawing which shows the repair condition of the water stop structure of (a). (A) is sectional drawing which shows the modification of the water stop structure of FIG. 11, (b) is sectional drawing which shows the repair condition of the water stop structure of (a). It is sectional drawing which shows the water stop structure which concerns on other suitable embodiment. (A) And (b) is sectional drawing which shows the repair condition of the water stop structure of FIG. (A) And (b) is sectional drawing which shows the modification of a water stop member.

DESCRIPTION OF EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.
In the present embodiment, as shown in FIG. 1, an underground structure 1 formed by connecting a plurality of box culverts (frames 2) in the ground G will be described.

  The underground structure 1 according to the first embodiment includes a plurality of housings 10 that are continuously provided in the ground, and a water stop structure 20 that stops water between adjacent housings 10. Yes.

  The casing 10 is a concrete box culvert having a rectangular cross section. In addition, the shape dimension etc. of the housing 10 are not limited.

  As shown in FIG. 2, a notch portion 11 for forming a groove-like space 21 of the water blocking structure 20 is formed on the axial end surface of the housing 10. Reference numeral 30 denotes a joint material made of an elastic filler or the like.

  As shown in FIG. 3, the notch 11 is combined with the notch 11 of another adjacent housing 10 to form a groove-like space 21 having a rectangular cross section at the joint between the housings.

  The surface of the notch 11 is covered with an outer frame plate 12 formed in an L-shaped cross section. The material of the outer frame plate 12 is not limited, but in the present embodiment, it is made of a steel plate or the like. The outer frame plate 12 is fixed to the housing 10 via a mounting portion 13 and an anchor bolt 14 which will be described later. The outer frame plate 12 may be installed as necessary and may be omitted.

  On the side surface of the cutout portion 11 (the surface facing the other housing 10), an attachment portion 13 used when attaching an emergency water-stop joint 25 described later is formed.

The attachment portion 13 includes an anchor nut 13a embedded so as to open to the grooved space 21 side, and a bolt (screw part) 13b screwed (fixed) to the anchor nut 13a from the grooved space 21 side. Has been. The configuration of the attachment portion 13 is not limited and can be set as appropriate.
In the present embodiment, the mounting portion 13 is formed in two stages with respect to the notch portion 11, but the number (number of steps) of the mounting portion 13 is not limited. Moreover, the structure of the attachment part 13 will not be limited if installation of the emergency water stop joint 25 is possible.

  An anchor bolt 14 for fixing a flexible waterproof joint 22 described later is installed on the bottom surface (the surface facing the inner space N) of the notch portion 11.

  In the present embodiment, the water blocking material 15 is installed on the back surface of the outer frame plate 12 (the surface opposite to the groove-shaped space 21), thereby preventing the penetration of groundwater from the back surface of the outer frame plate 12.

  The water stop structure 20 is formed at a joint portion between the casings 10 and prevents intrusion of groundwater or earth and sand from the joint.

As shown in FIG. 2, the water stop structure 20 is arranged so as to straddle the groove-shaped space 21 formed in the joint portion between the casings 10 and the joint between the casings 10 inside the groove-shaped space 21. A flexible water-stopping joint 22 and a water-stopping plate (water-stopping member) 23 that is disposed outside (groove mountain side) of the groove-like space 21 and is embedded so as to straddle the joint between the housings 10. ing.

The groove-like space 21 is a space in which the width of the butted portion between the casings 10 is widened by causing the notches 11 of the adjacent casings 10 to face each other.
The groove-like space 21 has a width that allows an operator to put a hand or a tool into the work.

An installation space 24 for an emergency water-stop joint 25 (see FIG. 4) to be retrofitted so as to cover the flexible water-stop joint 22 is secured in the groove-shaped space 21.
In the present embodiment, the installation space 24 of the emergency water stop joint 25 is formed in two steps in the depth direction of the grooved space 21. In the notch 11 at the end of each housing 10, two mounting portions 13 are arranged corresponding to the positions of the installation spaces 24. Note that the number of stages of the installation space 24 is not limited and can be set as appropriate. Further, the interval between the installation spaces 24 is not limited.

The flexible waterproof joint 22 is fixed to the bottom of the groove-like space 21 via the anchor bolts 14 and 14.
As shown in FIG. 3, the flexible waterproof joint 22 is fixed at one end by an anchor bolt 14 installed in one housing 10, and the other end is fixed by an anchor bolt 14 installed in the other housing 10. Therefore, it arrange | positions so that the joint of the housings 10 may be plugged up.

  The flexible waterproof joint 22 is made of a plate material such as synthetic rubber, and is disposed in a bent state at the center (joint between the casings). Thereby, even if the flexible water-stopping joint 22 is a case where a predetermined amount of deviation or mesh opening (displacement) occurs between the casings 10 due to expansion and contraction, the water-stopping joint 22 can be maintained. .

  The water stop plate 23 is a resin plate, and as shown in FIG. 2, one end is embedded in one casing 10 and the other end is embedded in the other casing 10, so that the straddle 10 is straddled. Arranged to close the joint.

  The water stop plate 23 includes a tubular portion 23a and embedded portions 23b and 23b extending forward and backward from the tubular portion 23a.

  The tubular portion 23a is disposed between the box culverts 10. The tubular portion 23a is configured to follow a predetermined amount by extending and deforming when a gap or an opening occurs in the joint between the box culverts 10 and 10. Further, the tubular portion 23a is torn when a deviation or opening of a predetermined amount or more occurs.

In the water stop plate 23, one embedded portion 23b is embedded in one casing, and the other embedded portion 23b is embedded in the other casing, thereby closing the joint.
In addition, the structure, fixing method, etc. of the water stop plate 23 are not limited.

  The installation space 24 is a place where the emergency water stop joint 25 is installed when the water stop function of the flexible water stop joint 22 or the water stop plate 23 is impaired due to unexpected ground deformation or disaster (see FIG. 4).

  The emergency water-stop joint 25 is a member installed so as to cover the flexible water-stop joint 22 in order to restore the water-stop performance of the water-stop structure 20, and in this embodiment, a flexible water-stop material. 25a and a spacer 25b.

The flexible water blocking material 25a is made of the same material as that of the flexible water blocking member 22, and is arranged so as to cover the inner water side of the flexible water blocking member 22 together with the spacer 25b.
The flexible water-stopping material 25a is configured to be bent so that the water-stopping performance is maintained by extending even when the housings 10 are further displaced.

The spacer 25b is a member made of steel or the like formed on a U-shaped cross section. The width of the flexible water-stopping material 25a is reduced to reduce the material cost. The spacer 25b may be used as necessary.
Further, the shape of the spacer 25b is not limited, and may be, for example, a rectangle or an L shape. Moreover, the attachment method of the spacer 25b is not limited, For example, what is necessary is just to perform suitably, such as performing by the method of screwing through a volt | bolt, welding.

  According to the underground structure 1, since the flexible water-stopping joint 22 and the water-stopping plate 23 are respectively disposed across the joints between the casings 10, groundwater, earth and sand, etc. are connected between the casings 10 together. From entering the underground structure 1.

  Moreover, since the water-stopping material is doubly arranged by the flexible water-stopping joint 22 and the water-stopping plate 23, a shift occurs between the casings 10 due to the action of stress such as an earthquake. Even if it is damaged, the water stoppage of the waterstop structure 20 can be maintained.

  Moreover, since the flexible waterproof joint 22 is installed in the bottom part of the groove-shaped space 21, the exchange work of the flexible waterproof joint 22 can be performed easily. At this time, since the water stop plate 23 is disposed on the ground mountain side of the flexible water stop joint 22, the replacement work can be performed while maintaining the water stop.

In addition, since the installation space 24 of the emergency water stop joint 25 is secured in the water stop structure 20, as shown in FIG. Even if the water plate 23 (see FIG. 2) is damaged, the flexible water-stopping joint 22 and the emergency water-stopping joint are installed by installing the emergency water-stopping joint 25 using the installation space 24. The double water stop structure by 25 can be restored.
Therefore, even if the flexible waterproof joint 22 is damaged due to further stress acting on the underground structure 1, the waterproofness by the emergency waterproof joint 25 is ensured.

  In addition, the flexible waterproof joint 22 is not guaranteed to have a flexible performance, but when a state where water leakage (flooding) can be prevented occurs, as shown in FIG. The double water stop structure can be restored again by installing an emergency water stop joint 25 in the installation space 24 provided on the inner air N side.

  In addition, when the flexible waterproof joint 22 is damaged, the drainage pipe 31 (see FIG. 2) is used to drain water and water pressure from the end face of the concrete, and as shown in FIG. The double water stop structure can be restored again by installing the emergency water stop joint 25 in the installation space 24 provided on the inner air N side of the emergency water stop joint 25. After restoration of the water stop structure, a valve (not shown) is closed and the drainage by the drain pipe 31 is stopped.

  The drain pipe 31 is a pipe material embedded in the casing 10, and as shown in FIG. 2, at one end of the drain pipe 31 is inside the water stop plate 23 and outside the flexible water stop joint 22. The other end of the box culvert 10 is piped so as to open into the inner space N or the groove-like space 21. In addition, the installation location, the number of installation, etc. of the drain pipe 31 are not limited.

  Thus, according to the underground structure 1 of the present embodiment, even when the water stop function of the flexible water stop joint is impaired due to unexpected ground deformation, disaster, or the like, the stop at the joint between the frames 10 is prevented. The water structure 20 can be simply and quickly restored.

  As shown in FIG. 5, the underground structure 2 according to the second embodiment has a groove-like space 26 formed in the connecting portion between the casings 10, and a wide portion 26 a formed in the opening portion, It differs from the underground structure 1 which concerns on 1st Embodiment by the point which has the narrow part 26b formed in the position deeper than the wide part 26a.

  The casing 10 according to the second embodiment is provided with a notch 16 for forming the groove-like space 26 of the water stop structure 20 on the axial end surface.

As shown in FIG. 6, the notch portion 16 is formed in a step shape, and forms a groove-like space 26 having a convex cross section when combined with the notch portion 16 of another adjacent housing 10.
In the present embodiment, the cutout portion 16 is formed in two steps, but the number of steps of the cutout portion 16 is not limited and may be set as appropriate.

  The surface of the notch 16 is covered with a stepped outer frame plate 17 formed according to the cross-sectional shape of the notch 16. Although the material of the outer frame board 17 is not limited, In this embodiment, it comprises a steel plate. The outer frame plate 17 may be installed as necessary and may be omitted.

The cutout portion 16 is formed with an attachment portion 13 used when attaching the emergency water stop joint 25 to the side surface of each step (the surface facing the other housing 10). That is, the attachment portion 13 is formed at each of the end of each housing 10 facing the wide portion 26a of the notch 16 and the end of each housing 10 facing the narrow portion 26b.
Since the structure of the attachment part 13 is the same as the content shown in 1st Embodiment, detailed description is abbreviate | omitted.

  Since the structure of the other casing 10 is the same as that shown in the first embodiment, detailed description thereof is omitted.

  As shown in FIG. 5, the water stop structure 20 is disposed so as to straddle the groove-like space 26 formed in the joint portion between the casings 10 and the joint between the casings 10 inside the groove-like space 26. A flexible water-stopping joint 22 and a water-stopping plate (water-stopping member) 23 that is disposed outside the groove-like space 26 (on the ground G side) and is embedded so as to straddle the joints between the frames 10. I have.

The groove-like space 26 is a space in which the width of the abutting portion between the casings 10 is widened by the notches 16 of the adjacent casings 10 being abutted with each other. Are formed in a convex shape in cross section.
The groove-like space 26 is configured so that an operator's hand or tool can be easily put in and the work can be easily performed due to the large width of the inner space N side.

  In the groove-like space 26, an installation space 24 of an emergency water-stop joint 25 that is retrofitted so as to cover the flexible water-stop joint 22 is secured in each of the wide portion 26a and the narrow portion 26b.

  Since the content of the water stop structure 20 of the underground structure 2 according to the other second embodiment is the same as the content shown in the first embodiment, detailed description thereof is omitted.

  According to the underground structure 2 according to the second embodiment, since the groove-like space 26 has the wide portion 26a on the inner air N side, when the flexible waterproof joint 22 is replaced, When installing the emergency water stop joint 25, it is easy to work in the grooved space 26.

In the second embodiment, the notch 16 is stepped, the wide portion 26a is formed on the inner space N side of the groove-like space 26, and the narrow portion 26b is formed on the natural ground G side. However, as long as the opening width of the groove-like space 26 is larger than the width of the bottom portion of the groove-like space 26, the cross-sectional shape is not limited.
Further, the number of installation spaces arranged in the wide part 26a and the narrow part 26b is not limited to one each, and a plurality of installation spaces may be installed.

  Since the operational effects of the underground structure 2 according to the other second embodiment are the same as those of the underground structure 1 of the first embodiment, detailed description thereof is omitted.

  As shown in FIG. 7, the underground structure 3 according to the third embodiment is the same as that of the first embodiment in that a groove-shaped work space is formed on the back surface of the attachment portion 13 ′. It differs from the underground structure 1 which concerns.

  The casings 10 and 10 'are concrete box culverts having a rectangular cross section. The shape dimensions and the like of the casings 10 and 10 'are not limited.

  Notches 11 and 11 ′ for forming the groove-like spaces 21 of the water blocking structure 20 are formed on the axial end surfaces of the casings 10 and 10 ′.

The cutout portion 11 ′ of one housing 10 ′ is formed longer in the axial direction than the cutout portion 11 of the other adjacent housing 10.
A mounting portion 13 ′ is formed at the end of one housing 10 ′, and a groove-like space 21 is formed by combining with the cutout portion 11 formed at the end of the other housing 10.

  The attachment portion 13 ′ includes an attachment plate 13 c that is erected so as to be orthogonal to the axial direction, and a rib 13 d that is erected on the back surface of the attachment plate.

  The attachment plate 13c is a steel plate to which the fixing jig 27 is fixed. The flexible water stop joint 22 or the emergency water stop joint 25 is fixed to the mounting plate 13c by the fixing jig 27. Bolt holes are formed in the mounting plate 13c, and the jig 27 can be fixed.

  A working space 18 is formed on the back surface of the mounting plate 13c (the surface opposite to the other housing 10).

The rib 13d is a steel plate for reinforcing the mounting plate 13c, and is disposed on the back surface of the mounting plate 13c so as to be orthogonal to the mounting plate 13c.
In addition, the structure of attachment part 13 'is not limited.

Further, an attachment plate 14 ′ for fixing the fixing jig 27 is fixed to the other housing 10.
The mounting plate 14 ′ is erected so as to be orthogonal to the axial direction, and a bolt hole for fixing the jig 27 is formed.

  In addition, an anchor bolt 13 ″ for fixing the emergency water stop joint 25 is installed in the other housing 10 in advance.

The water-stop structure 20 includes a groove-shaped space 21 formed at a joint portion of the housings 10 and 10 ′, and a flexible water-stop joint disposed so as to straddle the joint between the housings 10 inside the groove-shaped space 21. 22 and a water stop plate (water stop member) 23 that is disposed outside the ground space 21 (on the natural ground side) and is embedded so as to straddle the joints of the casings 10 and 10 ′.

The groove-like space 21 is a space in which the width of the butted portion between the casings 10 is widened by causing the notches 11 of the adjacent casings 10 to face each other.
The groove-like space 21 has a width that allows an operator to put a hand or a tool into the work.

  In the present embodiment, a work space 18 is formed adjacent to the groove-like space 21, and a space for a worker to enter is secured.

The flexible waterproof joint 22 is disposed at the bottom of the groove-like space 21 and is fixed to the mounting plates 13c and 14 ′ via jigs 27 and 27. The flexible waterproof joint 22 is disposed so as to close the joints of the casings 10 and 10 '.
Since the matter regarding the flexible waterproof joint 22 is the same as the content shown in 1st Embodiment, detailed description is abbreviate | omitted.

  The jig 27 is a member that sandwiches the end portion of the flexible waterproof joint 22 together with the mounting plate 13c (14 ').

The jig 27 includes a bolt 27a, a nut 27b, and an S-shaped pressing plate 27c.
When the end of the flexible waterproof joint 22 is pressed against the mounting plate 13c (14 ') by the pressing plate 27c and tightened by the bolt 27a and the nut 27b, the flexible waterproof joint 22 is fixed to the mounting plate 13c (14'). The

  As shown in FIGS. 8A to 8D, when the water stop function of the flexible water stop joint 22 or the water stop plate 23 is impaired due to unexpected ground deformation or disaster, an emergency water stop is performed. A joint 25 is installed.

  The emergency water-stop joint 25 is a member installed so as to cover the flexible water-stop joint 22 in order to restore the water-stop performance of the water-stop structure 20, and in this embodiment, a flexible water-stop material. 25a and a spacer 25b.

The flexible water blocking material 25 a is made of the same material as that of the flexible water blocking member 22, and is disposed so as to cover the inner air side of the flexible water blocking member 22. Further, the flexible water blocking material 25 a is fixed via jigs 27 and 27 in the same manner as the flexible water blocking member 22.
In addition, since the matters regarding the flexible water-stopping material 25a are the same as the contents shown in the first embodiment, detailed description thereof is omitted.

The spacer 25b is a steel member. Since the spacer 25b can be installed without changing the dimension (width) of the flexible water-stopping material 25a even if a displacement occurs, a mold by changing the width dimension of the flexible water-stopping material 25a. It is possible to reduce production costs and material costs. The spacer 25b may be used as necessary.
Further, the shape of the spacer 25b is not limited, and may be appropriately formed. Moreover, the attachment method of the spacer 25b is not limited, For example, what is necessary is just to perform suitably, such as performing by the method of screwing through a volt | bolt, welding.

  In the present embodiment, when the emergency water stop joint 25 is installed, the joint material 28 is disposed between the flexible water stop member 22 and the emergency water stop joint 25. A plate material 28 a is disposed on the ground material G side of the joint material 28 as necessary.

  Moreover, the filler 25c may be filled into the natural ground G side of the spacer 25b as necessary to improve the water stoppage.

  As described above, according to the underground structure 3 according to the third embodiment, since the work space 18 is formed adjacent to the water stop structure 20, work is performed in the hollow section by ducts, wiring, piping, and the like. Even if the space cannot be secured, the worker can work.

  Further, since the flexible water stop member 22 and the emergency water stop joint 25 are fixed via the jig 27, there is no need to form bolt holes in the flexible water stop member 22 and the emergency water stop joint 25. , Water stoppage is improved.

  In addition, the dimensional shape of the groove-like space 21 depends on various displacements such as shear displacement (FIGS. 8A and 8B), elongation displacement (FIG. 8C), and contraction displacement (FIG. 8D). Although it changes, it can be absorbed by changing the shape of the spacer 25b.

  Moreover, since the joint material 28 is arrange | positioned at the natural ground G side of the emergency water-stop joint 25, the further water-stop improvement can be anticipated.

  Moreover, since the filler 25c is filled in the natural ground G side of the spacer 25b, the penetration into the groundwater from the spacer 25b side is prevented.

  Since the operational effects of the underground structure 3 according to the other third embodiment are the same as those of the underground structure 1 according to the first embodiment, detailed description thereof is omitted.

  As shown in FIG. 9, the underground structure 4 according to the fourth embodiment is the first embodiment to the third embodiment in that the water stop member 23 ′ is made of a tube material. It is different from the underground structures 1 to 3.

  The water stop member 23 ′ is made of a rubber tube and bonded to the end surface of one housing 10.

  One housing 10 is provided with an injection pipe 29 connected to the water stop member 23 'from the inner air N side.

The water stop member 23 ′ is expanded by liquid or gas injected through the injection pipe 29 and shields the gap between the casings 10.
Therefore, when the flexible waterproof joint 22 is changed or the flexible waterproof joint 22 is damaged, the waterproof structure 23 is expanded by inflating the waterproof member 23 'to shield the gap. Aqueous can be maintained.
In addition, the material with which the inside of the water stop member 23 'is filled is not limited. Further, the shape and the like of the water stop member 23 'are not limited.

  Since the operational effects and the like of the underground structure 4 according to the other fourth embodiment are the same as the contents of the respective embodiments, detailed description thereof is omitted.

  As shown in FIG. 10A, the underground structure 5 according to the fifth embodiment is the third embodiment in that the cutout portion 11 of the other housing 10 is omitted or the cross-section is reduced. It is different from the underground structure 3 according to the form.

  The casings 10 and 10 'are concrete box culverts having a rectangular cross section. The shape dimensions and the like of the casings 10 and 10 'are not limited.

  As shown in FIG. 10A, a cutout portion 11 ′ for forming a groove-like space 21 of the water blocking structure 20 is formed on the axial end surface of one housing 10 ′. The cutout portion 11 ′ has a size that allows the work space 18 to be secured.

  In the present embodiment, the work such as repair of the water stop structure 20 is performed only from the side of the one housing 10 ′, and the notch 11 of the other housing 10 is large enough to fix the fixing jig 27. Is formed. The notch 11 of the other housing 10 may be omitted.

An attachment portion 13 'is formed at the end of one housing 10'.
The attachment portion 13 ′ includes an attachment plate 13c that is erected so as to be orthogonal to the axial direction, and a rib 13d that is erected on the back surface of the attachment plate 13c. A work space 18 is formed on the back surface of the mounting portion 13 ′ (the surface opposite to the other housing 10).

  The attachment plate 13c is a steel plate to which the fixing jig 27 is fixed. The flexible waterproof joint 22 is fixed to the mounting plate 13c by the fixing jig 27. Bolt holes are formed in the mounting plate 13c, and the jig 27 can be fixed.

The rib 13d is a steel plate for reinforcing the mounting plate 13c, and is disposed on the back surface of the mounting plate 13c so as to be orthogonal to the mounting plate 13c.
In addition, the structure of attachment part 13 'is not limited.

  The other casing 10 fixes a fixing jig 27 for fixing the flexible waterproof joint 22 (emergency waterproof joint 25) to the end face of the casing 10. At the end of the other housing 10, a female screw anchor (attachment portion 13, anchor bolt 14) for fixing the fixing jig 27 is installed so as to open to the one housing 10 ′ side.

The water stop structure 20 includes a groove-shaped space 21 formed between the mounting portion 13 ′ of one housing 10 ′ and an end surface of the other housing 10, and a joint between the housings 10 inside the groove-shaped space 21. A flexible water-stopping joint 22 arranged so as to straddle and a water-stopping plate (stopping) that is arranged outside the groove-like space 21 (on the ground mountain side) so as to straddle the joints of the casings 10 and 10 '. Water member) 23.

The flexible waterproof joint 22 is disposed at the bottom of the groove-like space 21 and is fixed to the mounting portion 13 and the mounting plate 13c4 ′ via fixing jigs 27 and 27. The flexible waterproof joint 22 is disposed so as to close the joints of the casings 10 and 10 '.
Since the matter regarding the flexible waterproof joint 22 is the same as the content shown in 1st Embodiment, detailed description is abbreviate | omitted. Moreover, since the matter regarding the fixing jig 27 is the same as the content shown in 3rd Embodiment, detailed description is abbreviate | omitted.

  In the underground structure 5, when the water stop function of the flexible water stop joint 22 or the water stop plate 23 is impaired due to unexpected ground deformation or disaster, as shown in FIG. A water stop joint 25 is installed.

  The emergency water-stop joint 25 is a member installed so as to cover the flexible water-stop joint 22 in order to restore the water-stop performance of the water-stop structure 20, and in this embodiment, a flexible water-stop material. 25a and a spacer 25b.

The flexible water blocking material 25 a is made of the same material as that of the flexible water blocking member 22, and is disposed so as to cover the inner air side of the flexible water blocking member 22. In addition, the flexible water blocking material 25 a is fixed via the fixing jigs 27 and 27 in the same manner as the flexible water blocking member 22.
In addition, since the matters regarding the flexible water-stopping material 25a are the same as the contents shown in the first embodiment, detailed description thereof is omitted.

  The spacer 25b is a steel member installed on one housing 10 '. The spacer 25b is fixed to the inner space side of the attachment portion 13 '. In the present embodiment, the surface of the spacer 25b and the surface of the attachment portion 13 'are arranged so as to be flush with each other.

The spacer 25b is fixed to one housing 10 'via a spacer fixing member 25d and a bolt 25e fixed to the back side thereof.
The configuration of the spacer 25b is not limited and may be set as appropriate. Further, the method for fixing the spacer 25b is not limited, and may be appropriately performed according to the shape of the spacer 25b.

  In the present embodiment, when the emergency water stop joint 25 is installed, the joint material 28 is disposed between the flexible water stop member 22 and the emergency water stop joint 25. A plate material 28 a is disposed on the ground material G side of the joint material 28 as necessary.

  As mentioned above, according to the underground structure 5 which concerns on 5th Embodiment, since it is not necessary to give special processing to the end surface of the other housing 10, it becomes possible to reduce manufacturing cost.

  Moreover, since installation and repair of the water stop structure 20 can be performed only from the side of one housing 10 '(work space 18), in parallel with the installation or repair of the water stop structure 20, the other body 10 It is possible to perform the work.

  In addition, the displacement of the underground structure 5 can be absorbed by changing the shape of the spacer 25b.

  In addition, since the effect of the underground structure 5 which concerns on 5th Embodiment is the same as that of the underground structure 3 which concerns on 3rd Embodiment, detailed description is abbreviate | omitted.

  The underground structure 6 according to the sixth embodiment includes a plurality of housings 10 provided continuously in the ground, and a water stop structure 20 that stops water between adjacent housings 10. Yes.

  The casing 10 is a concrete box culvert having a rectangular cross section. In addition, the shape dimension etc. of the housing 10 are not limited.

  As shown in FIG. 11A, a cutout portion 11 for forming a groove-like space 21 of the water blocking structure 20 is formed on the axial end surface of the housing 10.

  The notch 11 is combined with the notch 11 of another adjacent housing 10 to form a groove-like space 21 having a rectangular cross section in the joint between the housings 10.

  The surface of the notch 11 (the end face of the housing 10) is covered with an outer frame plate 12. Although the material of the outer frame board 12 is not limited, in this embodiment, it comprises a steel plate. The outer frame plate 12 is fixed to the housing 10 via a mounting portion 13 and the like which will be described later. The outer frame plate 12 may be installed as necessary and may be omitted.

  The attachment part 13 used when attaching the anchor bolt 14 for fixing the flexible water-stopping joint 22 and the emergency water-stopping joint 25 to the side surface of the notch part 11 (the surface facing the other housing 10). Is formed. In addition, although this embodiment demonstrates the case where the attachment part 13 is formed, you may abbreviate | omit the attachment part 13 like the underground structure 6 'shown to Fig.12 (a). In this case, when the emergency water stop joint 25 is attached, it may be fixed via the second attachment portion 19 as shown in FIG.

  The mounting portion 13 includes an anchor nut 13a embedded so as to open to the grooved space 21 side, and a bolt (screw part) 13b screwed (fixed) to the anchor nut 13a from the grooved space 21 side. Has been. The configuration of the attachment portion 13 is not limited and can be set as appropriate.

  Moreover, the housing 10 of this embodiment is provided with the 2nd attachment part 19 provided with the anchor nut embed | buried so that it might open to the inner space side of the housing 10. FIG.

  The water stop structure 20 is formed at a joint portion between the casings 10 and prevents intrusion of groundwater or earth and sand from the joint.

  The water-stop structure 20 includes a groove-shaped space 21 formed at a joint portion between the housings 10, and a flexible water-stop joint 22 disposed so as to straddle the joint between the housings 10 inside the groove-shaped space 21. The water stop plate 23 (not shown) is provided outside the groove-like space 21 (on the natural ground side) and embedded so as to straddle the joints between the frames 10.

An installation space 24 for an emergency water-stop joint 25 that is retrofitted so as to cover the flexible water-stop joint 22 is secured in the groove-shaped space 21.
In the notch 11 at the end of each housing 10, a mounting portion 13 is arranged corresponding to the position of the installation space 24. Note that the number of stages of the installation space 24 is not limited and can be set as appropriate. Further, the interval between the installation spaces 24 is not limited.

The flexible waterproof joint 22 is fixed to the bottom of the groove-shaped space 21 via fixing jigs 27 and 27. Since the configuration of the fixing jig 27 is the same as that shown in the third embodiment, detailed description thereof is omitted.
The fixing jig 27 is fixed to the anchor bolt 14 installed in the housing 10 so that the flexible waterproof joint 27 is disposed so as to close the joint between the housings 10.

Since the structure of the flexible waterproof joint 22 is the same as that shown in the third embodiment, detailed description thereof is omitted.
Moreover, since the structure of the water stop plate 23 is the same as the content shown in 1st Embodiment, detailed description is abbreviate | omitted.

  The installation space 24 is a place where the emergency water stop joint 25 is installed when the water stop function of the flexible water stop joint 22 or the water stop plate 23 is impaired due to unexpected ground deformation or disaster (see FIG. 11 (b)).

  The construction of the emergency water-stop joint 25 is a member installed so as to cover the flexible water-stop joint 22 in order to restore the water-stop performance of the water-stop structure 20. A water material 25a is provided.

The flexible water-stopping material 25a is configured to be bent so that the water-stopping performance is maintained by extending even when the housings 10 are further displaced.
In addition, since the matter regarding the flexible water blocking material 25a is the same as the content shown in 1st Embodiment, detailed description is abbreviate | omitted.

Moreover, since the installation space 24 of the emergency water stop joint 25 is ensured in the water stop structure 20, as shown in FIG.11 (b), the emergency water stop joint 25 is used using the installation space 24. As shown in FIG. Can be installed.
Therefore, even if the flexible waterproof joint 22 is damaged due to the stress acting on the underground structure 1, the waterproofness by the emergency waterproof joint 25 is ensured.

  Further, when the flexible water-stopping joint 22 is damaged, the emergency water-stopping joint 25 can be installed using the second mounting portions 19 and 19 as shown in FIG. Is possible. The double water-stop structure can be restored again by installing the emergency water-stop joint 25 on the inner air N side of the emergency water-stop joint 25 using the second mounting portions 19 and 19. .

  The emergency water stop joint 25 (flexible water stop material 25a) is attached to the second attachment portion 19 via the spacer 25b. The structure of the spacer 25b is not limited and may be appropriately formed.

  As described above, according to the underground structure 6 of the sixth embodiment, even when the water stop function of the flexible water stop joint is impaired due to unexpected ground deformation, disaster, or the like, the connection between the frames 10 is performed. The water stop structure 20 in the eye can be easily and quickly restored.

  Since the operational effects of the underground structure 6 according to the other sixth embodiment are the same as the contents shown in the first embodiment, detailed description thereof is omitted.

As mentioned above, although preferred embodiment was described about this invention, this invention is not restricted to said each embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably.
For example, the number of stages of the installation space (attachment portion) is not limited and can be set as appropriate.

Further, in each of the above embodiments, the emergency water stop joint 25 is fixed through a mounting portion previously installed in the grooved space for the purpose of restoring the water stop performance. The method for fixing the water joint is not limited.
For example, as shown in FIG. 14 (a), when a displacement occurs in the underground structure 3 for the groove-like space 21 that does not include an attachment portion, such as the underground structure 7 shown in FIG. After the mounting iron plates 25c and 25c are welded to the installation space 24 in the groove-shaped space 21, the flexible water-stopping material 25a is attached across the mounting iron plates 25c and 25c. The side is covered with an emergency water stop joint 25. Thereby, restoration of the water stop performance of the water stop structure 20 is realized. When further displacement occurs, as shown in FIG. 14B, the emergency water stop joint 25 may be installed on the inner space side by the same method as described above.

  In each of the above embodiments, the water stop member is disposed outside the groove-shaped space 21 (on the ground mountain G side) and inside the outer peripheral surface of the housing 10, but FIG. And like the underground structure 8 shown to (b), you may arrange | position the water stop member 23 '' facing the natural ground G. FIG.

  Further, as shown in FIGS. 15A and 15B, a filler 25c may be filled on the natural mountain side of the spacer 25b as necessary. In addition, the material which comprises the filler 25c is not limited.

Moreover, you may install (fill) the heat insulating material in the groove-shaped space 21 (26) as needed. The heat insulating material shall be installed on the inner air N side of the flexible water-stopping joint 22 or the emergency water-stopping joint 25, and the flexible water-stopping joint 22 or the The emergency water stop joint 25 is protected. In addition, the material etc. which comprise a heat insulating material are not limited.
In addition, when installing a heat insulating material, in order to prevent the heat insulating material from falling out of the grooved space 21 or coming out, a cover material is installed on the inner space N side of the grooved space 21 (26). Also good. Although the configuration of the lid is not limited, for example, a plate-like lid such as a steel plate is disposed so as to cover the inner space N side of the groove-like space 21 (26), What is necessary is just to fix via the 2nd attaching part 19 (refer FIG. 11) etc. which were formed so that it might open to the sky side.

1, 2, 3, 4, 5, 6, 7, 8 Underground structure 10 Housing 11 Notch 13 Mounting part 13a Anchor nut 13b Bolt (screw part)
20 Water stop structure 21 Grooved space 22 Flexible water stop joint 23 Water stop plate (water stop member)
24 Installation space 25 Emergency stop joint 26 Grooved space 26a Wide part 26b Narrow part G Ground N Interior

Claims (9)

A plurality of enclosures embedded in the ground,
An underground structure comprising a flexible water-stopping joint disposed so as to straddle a joint between the adjacent housings,
The flexible waterproof joint is disposed in a groove-like space provided on the inner space side of the boundary portion between the two housings,
An underground structure in which an installation space for an emergency water-stop joint that is retrofitted so as to cover the flexible water-stop joint is secured at the boundary portion.   2. The underground structure according to claim 1, wherein an attachment portion used when attaching the emergency water stop joint is formed at an end portion of each housing facing the groove-like space. object.   The underground structure according to claim 2, wherein a groove-like work space is formed on a side surface of the attachment portion.   The underground structure according to claim 2 or 3, wherein the attachment portion includes a screw component fixed to the housing. A plurality of installation spaces are secured in the groove-like space,
5. The underground structure according to claim 1, wherein a plurality of mounting portions are formed at an end portion of each of the housings facing the groove-like space. . The groove-like space has a wide portion formed in the opening portion, and a narrow portion formed in a position deeper than the wide portion,
The installation space is secured in each of the wide part and the narrow part,
6. The underground according to claim 5, wherein the attachment portion is formed at each of an end portion of each housing facing the wide portion and an end portion of each housing facing the narrow portion. Structure.   The underground structure according to any one of claims 1 to 5, wherein an opening width of the groove-like space is larger than a width of a bottom portion of the groove-like space.   The water stop member which stops water of the joint of the said frames is arrange | positioned in the ground side rather than the said flexible water stop joint, The any one of Claims 1 thru | or 7 characterized by the above-mentioned. Underground structure. The underground structure according to claim 8, wherein the water stop member is formed of a tube material that can be expanded and contracted.

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