JP4558462B2 - Seal device used for propelling hollow body and waterstop body thereof - Google Patents

Description

  The present invention is a seal equipped to prevent underground water from entering a pit when propelling a hollow body such as a pipe or culvert having various cross-sectional shapes from a tunnel, a shaft, a horizontal shaft, a tilt shaft, or the like. The present invention relates to an apparatus and a waterstop used for the sealing apparatus.

  Although it depends on the groundwater level, when a hollow body such as a pipe is propelled from the starting pit to the reaching pit, it is inevitable that groundwater will enter the mine at the time of starting. It is common to install a water stop structure.

  Conventionally, this type of water-stopping structure has naturally been questioned mainly for its water-stopping function. In one of the conventional water-stopping structures, a part of the pipe is wrapped with a sponge sheet, this sheet is tightened with a fastener from the periphery, and a mold is placed around this fastener to fill concrete or mortar. However, there is a solidified product that fixes a sheet around a pipe. In this water-stopping structure, the solidified material of concrete or mortar adheres to the earth retaining wall, and prevents groundwater from entering between the pipe or sheet and the earth retaining wall, so that it has an excellent water stopping function. However, in this water stop structure, since the movement of the pipe in the radial direction is suppressed by the solidified material, the pipe can move only in a minute range of the compression range of the sheet. Thus, when the tube moves, the tube may compress and break the sheet strongly and lose its sealing function.

  The situation that causes the loss of the sealing function is caused by the movement of the pipe during propulsion. The movement of the pipe refers to the case where a pipe line is formed in the ground while adding pipes, the pipe roof is formed by connecting a plurality of pipes with joints and sequentially propelling them in parallel, etc. Because the geology of the pipe is not constant, the propulsion resistance received by each part of the pipe varies, and the propulsive force on the pipe is not necessarily exerted uniformly in the axial direction of the pipe, but is sometimes exerted eccentrically. Rolling, pitching, and other movements that occur for a reason, appearing in the mine as pipe movement with movement of the pipe axis or movement during angular movement about the axis. When this movement is suppressed, as described above, the sheet is strongly compressed and broken, resulting in the loss of its sealing function.

Japanese Patent Laid-Open No. 10-18756

  Accordingly, an object of the present invention is to enable a wide range of movement of a hollow body in a sealing device that prevents intrusion of groundwater into a mine when propelling a hollow body such as a pipe from a mine having a retaining wall. It is in.

  Another object of the present invention is to increase the efficiency of installation work of this kind of sealing device.

  Furthermore, another object of the present invention is to increase the durability of this type of sealing device.

  In order to achieve the object of the present invention for providing a sealing device for preventing intrusion of groundwater into a mine when propelling a hollow body from a mine having a retaining wall and a water-stopping body used for the sealing device, So that the hollow body can move along its central axis and move angularly around its central axis, so that the waterstop can move with the hollow body The basic concept is that the waterstop is composed of parts that do not depend on the site construction so that the waterstop can be joined at the outer periphery of the hollow body inside or outside the mine.

  The sealing device according to the present invention is attached to a retaining wall in a watertight manner, having a wellhead plate having an opening for receiving a hollow body, a waterstop body attached to an outer peripheral surface of the hollow body, and attached to the wellhead plate, A holding plate having an opening for receiving a hollow body, and the waterstop is held movably between the wellhead plate and the holding plate.

  The waterstop according to the present invention includes a plurality of divided members each having an inner circumferential groove on the inner circumferential surface and a circumferential groove on the inner side surface, and a first seal member disposed in the inner circumferential groove. And a second seal member disposed in the circumferential groove and means for integrally coupling the divided members. The coupling means includes a flange provided at each end of each divided member and a bolt hole provided in the flange, and the divided member is integrally coupled by a bolt and a nut passing through the bolt hole. . Instead of this, the coupling means may include a groove provided on the outer periphery of each divided member and a steel wire disposed in the groove, and the divided member may be integrally coupled with the steel wire.

  According to another aspect, the waterstop includes an annular seal member having a substantially rectangular cross-sectional shape and provided with a groove on the outer peripheral surface, and a reinforcing wire received in the groove.

  According to the present invention, the water stop body can be moved between the wellhead plate and the holding plate together with the hollow body while maintaining the water stop state. The movement of the waterstop body together with the hollow body includes not only angular movement around the hollow body axis but also movement of moving the axis. This movement can be performed extensively because the outer periphery of the waterstop is not obstructed by its movement.

  In addition, according to the present invention, it is not necessary to wait for concrete placement at the start port in the mine or solidification in order to complete the water stop structure, and the water stop body can be assembled to the hollow body in the vicinity of the start port in the mine, It can also be assembled inside and outside the mine and work efficiency can be significantly improved.

  Furthermore, according to the present invention, the sealing member constituting the waterstop body can be manufactured with various synthetic materials having excellent water tightness and wear resistance, and there is no adhesion of concrete or the like due to on-site construction. Durability is high and can be repeatedly used for tube propulsion.

  As shown in FIGS. 1 and 2, the sealing device 10 prevents groundwater from entering the mine when propelling the hollow body 18 from the mine 16 having the retaining wall 14 that prevents the collapse of the natural ground 12. It is installed in relation to the earth retaining wall 14 and the hollow body 18. The sealing device 10 includes a wellhead plate 20, a water blocking body 22, and a holding plate 24 as a whole.

  The wellhead plate 20 has an opening 26 for receiving the hollow body 18, and is watertightly attached to the earth retaining wall 14 via the attachment frame 15. The waterstop 22 is attached to the outer peripheral surface of the hollow body 18. Furthermore, the holding plate 24 has an opening 28 for receiving the hollow body 18, and is detachably attached to the wellhead plate 20 by a nut 32 that is screwed into a bolt 30 extending therefrom. The water blocking body 22 is movably held between the well plate 20 and the holding plate 24 while ensuring a water blocking function.

  In the illustrated example, the hollow body 18 is a circular tube, but may be a circular tube with a joint, a rectangular tube, a rectangular tube with a joint, a circular or rectangular multiple tube with a joint, or the like. The pipe with a joint here has a male joint on one side on both sides of the pipe and a female joint on the other side, a female joint on both sides (FIGS. 14 and 17), and a male joint on both sides. Things are included.

  In the illustrated example, the retaining wall 14 is made of a steel sheet pile, and the wellhead plate 20 is made of a steel plate welded to the retaining wall via the attachment frame 15. The mounting frame 15 is a quadrangular, parallel pair of H-shaped steel 15a and a pair of parallel steel plates 15b welded thereto, and is welded to the retaining wall 14 as a whole. Although it is necessary to ensure water-stopping between the mountain retaining wall 14 and the wellhead plate 20, the wellhead plate 20 is not attached to the steel mountain retaining wall 14 via a mounting frame, instead of the example of FIGS. It may be welded directly. The mountain retaining wall can also be formed of a solidified material such as concrete or a muddy water solidified material. In this case, the attachment frame 15 or the wellhead plate 20 is fixed to the mountain retaining wall 14 with an anchor bolt (not shown).

  As shown in FIGS. 3 and 4, bolts 30 (12 in the illustrated example) extending from the well plate 20 are arranged around the well plate in parallel to the axis of the opening 26, and their heads are welded to the well plate. Has been. As shown in FIG. 5, the holding plate 24 has bolt holes 34 for receiving the bolts at positions corresponding to the bolts 30 provided on the wellhead plate 20.

(Example 1 of water stop body)
Referring to FIGS. 6 and 7, the waterstop 22 holds the endless or annular first and second seal members 36, 38 in an annular shape when the seal members 22 are joined together. A plurality (three in the illustrated example) of the dividing members 40 and means for integrally connecting the dividing members are included. As shown in FIG. 9, each divided member 40 has an inner peripheral groove 42 that receives the first seal member 36 on the inner peripheral surface thereof, and a peripheral groove 44 that receives the second seal member 38 on the inner side surface. . Moreover, each division member 40 has the flange 48 which has the bolt hole 46 at each of the both ends as a coupling means. All the dividing members 40 are integrally and separably connected by bolts and nuts 50 (FIG. 6). Another example of means for connecting the divided members 40 integrally and in a separable manner is to place a steel wire in a groove provided on the outer periphery of each divided member, and to fasten and connect the groove. (Neither of them is shown) is similar to the relationship between a groove provided on the outer periphery of a waterstop body 54 to be described later and a fastening wire 56 disposed in the groove (FIG. 12).

  Referring again to FIG. 1, the first seal member 36 of the waterstop 22 is in contact with the outer peripheral surface of the hollow body 18, and the second seal member 38 is in contact with the outer surface of the wellhead plate 20. It is held between the holding plate 24 and prevents the underground water from entering the pit 16 from between the mountain retaining wall 14, the mounting frame 15, the wellhead plate 20, and the hollow body 18.

  As a modified example, circumferential grooves are provided on both opposite side surfaces of each divided member 40, that is, the inner side surface and the outer side surface, the second seal member 38 is disposed in the circumferential groove on the inner side surface, and the circumferential groove on the outer side surface is provided. A contact member 52 (FIG. 20) may be disposed. The contact member 52 does not need to have a sealing property, but is preferably made of a material having the same coefficient of friction as the sealing member 38. For this reason, the same material as the sealing member 38 can be disposed.

(Example 2 of still water body)
In the example shown in FIGS. 10 and 11, end members, that is, arc-shaped seal members 361 and 381 are arranged on each of the three divided members 40. The waterstop 22 has three divided members 40, each divided member having an inner circumferential groove on the inner circumferential surface, and a first seal member 361 is disposed in the inner circumferential groove. The second seal member 381 is disposed in the circumferential groove provided on the inner side surface of each divided member 40, and the contact member 521 is disposed in the circumferential groove provided on the outer side surface. As in the embodiment described above, each split member 40 includes flanges 48 having bolt holes 46 at both ends thereof as coupling means. The split member 22 is integrally joined around the hollow body 18 by bolts and nuts 50 (FIG. 6). The coupled state is the same as in the example of FIG. 6 except that the seal members 361 and 381 and the contact member 521 are not integrated but continuous. As the coupling means of the dividing member 40, the above-described groove and a fastening steel wire disposed in the groove can be used.

(Example 3 of water stop body)
In the example shown in FIGS. 12 and 13, the waterstop 22 is composed of two parts. The waterstop 22 includes an annular seal member 54 having a substantially rectangular cross-sectional shape and a groove formed on the outer peripheral surface, and a reinforcing wire 56 received in the groove when used as shown in FIG. The seal member 54 is made of synthetic rubber.

  14 and 15, these are views corresponding to FIGS. 2 and 6 in the case of a hollow body 181 that is a circular tube having joints 60 and 62, and have the same shape as the opening 281 of the holding plate 24. Are also formed in the wellhead plate (not shown). The joints 60 and 62 are both female, but both can be male, or one can be male and the other female. The waterstop 22 is composed of three divided members 40, 401, 401 that are shaped so that the whole can be attached to the outer periphery of a pipe 181 with a joint (FIG. 15). As the means for connecting the divided members, those using the bolts and nuts and those using a steel wire can be used. The water stop body 22 used for the hollow body 181 which is a pipe with a joint can take various configurations as in the two embodiments described above.

  As shown in FIG. 16, the water stop body 22 used for the hollow body 182 which is a pipe having a rectangular cross-sectional shape is composed of four divided members each having the same shape. On the other hand, as shown in FIG. 17, the waterstop 22 used for the hollow body 183 that is a circular double pipe having the joints 60 and 62 connected by the connecting member 64 is composed of four odd-shaped divided members. In the illustrated example, the joints 60 and 62 are both female, but both may be male, or one may be male and the other female. The waterstop 22 used for the hollow body 182 can take various configurations as in the above-described three embodiments.

  Next, the stop including the annular first and second seal members 36 and 38 and the contact member 52 shown in the modification of the first embodiment of the waterstop, and the split member 40 that holds these members in an annular shape. Taking the water body 22 as an example, attachment of the waterstop body to the hollow body will be described. First, as shown in FIG. 18, in addition to the holding plate 24 on the outer periphery of the end portion of the hollow body 18 in the vicinity of the wellhead plate 20 welded to the mountain retaining wall 14 via the mounting frame 15 or outside the well, both are annular. The contact member 52, the first seal member 36, and the second seal member 38 are fitted together. Further, the three divided members 40 are temporarily placed at predetermined positions on the outer periphery of the hollow body 18, for example, between the first seal member 36 and the contact member 52 (FIG. 18), from which all the divided members 40 are placed. Positioning is performed on the sealing member so as to receive the first sealing member 36 in the circumferential groove 42 (FIG. 19). Further, the second seal member is fitted into the circumferential groove 44 of the dividing member 40, and the contact member 52 is fitted into the opposite circumferential groove 44 '. In this state, the flanges 48 of the divided members 40 are abutted, and all the divided members 40 are joined by bolts and nuts 50 through the bolt holes 46. Thus, the water stop body 22 is completed on the outer periphery of the hollow body 18, and the water stop body ensures water tightness between the inner peripheral surface of the first seal member 36 and the outer peripheral surface of the hollow body 18. Thereafter, the water blocking body 22 is sandwiched between the wellhead plate 20 and the holding plate 24 in the starting state of the hollow body 18, as shown in FIG.

  The water stop body 22 (FIGS. 10 and 11) in which the non-annular, that is, the end-sealed seal member is disposed in each of the three divided members 40 without using the annular seal member of the water stop body of the second embodiment. Three divided members 40 can be connected around the hollow body by bolts and nuts 50 (FIG. 6) and attached to the hollow body.

  In addition, the water stop body 22 composed of two parts of the water stop body embodiment 3 is fitted with the annular seal member 54 in the hollow body 18 as in the modification example of the first embodiment described above, Thereafter, the reinforcing wire 56 is disposed in the outer peripheral groove of the seal member 54, and is tightened to fix the seal member 54 to the hollow body 18 (FIG. 12).

  In the state shown in FIG. 20, the hollow body 18 is maintained in a water-stopped state by the first and second seal members 36 and 38 under the state where the tip is in the ground and the rear end is in the pit. The waterstop 22 can be freely moved between the well plate 20 and the holding plate 24 together with the hollow body 18. The movement of the waterstop body 22 together with the hollow body 18 due to variations in the propulsion resistance with respect to the hollow body 18 and the application of an eccentric propulsive force to the hollow body 18 includes not only the angular movement around the hollow body axis line but also the axis line. Although there are movements to be moved, these movements can be performed widely because there is nothing to restrain the movement on the outer periphery of the water stop body 22.

The fragmentary longitudinal cross-sectional view of the starting wellhead in the mine where the sealing device concerning the Example of this invention is arrange | positioned. The front view of the sealing device shown in FIG. The front view of the wellhead plate which comprises the sealing apparatus shown in FIG. FIG. 4 is a longitudinal sectional view of a wellhead plate taken along line 4-4 of FIG. The front view of the holding plate which comprises the sealing device shown in FIG. The side view of the water stop which comprises the sealing device shown in FIG. FIG. 7 is a central cross-sectional view of a waterstop obtained along line 7-7 in FIG. 6. The disassembled front view which shows the division body which comprises the water stop body shown in FIG. FIG. 9 is a central cross-sectional view of a waterstop obtained along line 9-9 in FIG. 8. The exploded front view similar to FIG. 8 which shows the 2nd Example of a water stop body. The center sectional view similar to FIG. 9 of the waterstop shown in FIG. The longitudinal cross-sectional view similar to FIG. 1 which shows the 3rd Example of a water stop body. The front view similar to FIG. 2 about the Example shown in FIG. The front view similar to FIG. 2 which shows the hollow body which is a circular tube with a joint, and the water stop attached to this. The front view of the waterstop shown in FIG. The front view similar to FIG. 2 which shows the hollow body which is a rectangular pipe | tube, and the water stop attached to this. The front view similar to FIG. 2 which shows the hollow body which is a double circular pipe | tube with a joint, and the water stop attached to this. Sectional drawing which shows the 1st step of attachment to the hollow body of a water stop body. Sectional drawing which shows the state in which the 1st seal member was received by the internal peripheral groove | channel of a division member. The longitudinal cross-sectional view similar to FIG. 1 which shows the state with which the water stop body was couple | bonded around the hollow body, and was fixed to the hollow body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sealing device 14 Earth retaining wall 16 Tunnel 18 Hollow body 20 Wellhead plate 22 Water stop 24 Holding plate 26, 28 Opening 30, 32 Bolt and nut 36, 38 Seal member 40 Dividing member 42 Inner circumferential groove 44, 44 'Circumferential groove 50 Bolt / Nut 52 Contact member

Claims (21)

  A sealing device for preventing intrusion of groundwater into a pit when propelling a hollow body from a pit provided with a retaining wall, the wellhead plate having an opening for receiving the hollow body, which is watertightly attached to the retaining wall. A waterstop attached to the outer peripheral surface of the hollow body, and a holding plate attached to the wellhead plate and having an opening for receiving the hollow body, the waterstop between the wellhead plate and the holding plate. A sealing device that is held movably.   The sealing device according to claim 1, wherein the hollow body is a circular tube or a circular tube with a joint.   The sealing device according to claim 1, wherein the hollow body is a rectangular tube or a rectangular tube with a joint.   The sealing device according to claim 1, wherein the hollow body is a circular or rectangular multi-tube with a joint.   The earth retaining wall is a steel sheet pile, the wellhead plate is a steel plate fixed to the steel sheet pile via an attachment frame, and the steel plate is attached to the periphery thereof and parallel to the axis of the opening of the wellhead plate. The sealing device according to claim 1, comprising a plurality of bolts.   Each of the waterstops has an inner circumferential groove on the inner circumferential surface, a plurality of divided members having a circumferential groove on the inner side surface, a first seal member disposed in the inner circumferential groove, and the circumferential groove The sealing device according to claim 1, further comprising: a second seal member disposed on the first member, and means for integrally joining the divided members.   The coupling means includes a flange provided at each end of each divided member and a bolt hole provided in the flange, and the divided member is integrally coupled by a bolt and a nut passing through the bolt hole. The sealing device according to claim 6.   The seal according to claim 6, wherein the coupling means includes a groove provided on an outer periphery of each divided member and a steel wire disposed in the groove, and the divided member is integrally coupled by the steel wire. apparatus.   The sealing device according to claim 6, wherein the first and second sealing members are endless members.   The sealing device according to claim 6, wherein the first and second sealing members include a plurality of end members.   The sealing device according to any one of claims 6 to 10, wherein each divided member includes a circumferential groove on an outer surface thereof and a contact member disposed in the circumferential groove.   The sealing device according to claim 1, wherein the waterstop body includes an annular seal member having a substantially rectangular cross-sectional shape and provided with a groove on an outer peripheral surface, and a reinforcing wire received in the groove.   The sealing device according to claim 12, wherein the sealing member is made of synthetic rubber.   A waterstop used for a sealing device that prevents entry of groundwater into a mine when propelling a hollow body from the mine, each having an inner peripheral groove on the inner peripheral surface and a plurality of peripheral grooves on the inner surface A waterstop body comprising: a split member, a first seal member disposed in the inner circumferential groove, a second seal member disposed in the circumferential groove, and means for integrally coupling the divided members.   The coupling means includes a flange provided at each end of each divided member and a bolt hole provided in the flange, and the divided member is integrally coupled by a bolt and a nut passing through the bolt hole. The waterstop body according to claim 14.   The said coupling | bonding means contains the groove | channel provided in the outer periphery of each division member, and the steel wire arrange | positioned in this groove | channel, The said division member is integrally couple | bonded by the said steel wire. Water body.   The waterstop body according to claim 14, wherein the first and second sealing members are endless members.   The water stop body according to claim 14, wherein the first and second sealing members are formed of a plurality of continuous linear members.   19. The waterstop according to claim 14, wherein each divided member includes a circumferential groove on an outer surface thereof and a contact member disposed in the circumferential groove.   A waterstop used for a sealing device for preventing intrusion of groundwater into a mine when propelling a hollow body from the mine, and has an approximately rectangular cross-sectional shape, and an annular seal member provided with a groove on the outer peripheral surface And a waterstop body comprising a reinforcing wire received in the groove.   The water stop body according to claim 20, wherein the seal member is made of synthetic rubber.

Images