JP2009180019A - Water permeable segment and tunnel using the water permeable segment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water permeable segment for use in constructing a tunnel, in which a water leading means for leading groundwater is arranged, and a water leading pipe for introducing the groundwater, and a drain pipe for draining the introduced groundwater via the water leading means to the outside, are arranged in the water leading means, the segment being simple in structure and excellent in maintenance ease, and facilitating construction of the tunnel, and to provide the tunnel constructed of the water permeable segments. <P>SOLUTION: The segment is for use in constructing the tunnel in the ground where groundwater is present, and a segment body has the water leading means arranged therein, as a groundwater leading channel. The segment body has formed therein guide pipes in a thickness direction of the segment body in a manner being orthogonal to the water leading means and communicating with the same. The segment body further has cleaning pipes arranged therein. Each cleaning pipe has one end thereof communicating with the water leading means in the segment body, and the other end thereof adjoining an internal surface of the segment body, and a cleaning water stop valve for maintenance is detachably arranged therein. Then the water permeable segments thus formed are assembled to construct the tunnel. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a segment constructed in the ground as an underground structure, and more particularly, to a water permeable segment provided with a water passage designed to prevent flow inhibition of ground water and a tunnel using the water permeable segment.

  Various underground structures are constructed for effective use of the underground. A typical structure is a tunnel constructed by incorporating a segment while excavating a horizontal shaft for roads or railways underground using a shield method. Depending on the location, there are underground water veins inside the ground. If a tunnel is constructed in this part, all or part of the groundwater vein, or a substantial part of it will be blocked or narrowed, so the groundwater in the downstream area of the groundwater vein will decrease and the wells and springs will be depleted. The irrigation pond may dry up and have a great adverse effect on agriculture, tourism resources and the living environment of the local residents.

  FIG. 12 shows a conventional general road tunnel constructed in the ground. In the ground, there may be ground A with low water permeability, ground B with high water permeability, ground C with low water permeability, and the like.

  The ground B having a large water permeability has a groundwater vein, and as shown by arrows in the figure, for example, when groundwater flows from the right side to the left side, if there is a road tunnel 100 in the ground B, the groundwater Is blocked by the tunnel 100. In the figure, G is the ground surface, 101 is the road bed provided in the tunnel, 102 is the pavement provided on the tunnel, 103 indicated by the broken line is the building limit, 104 is the sign installation space, and 105 is the guard passage. is there.

In such a case, Patent No. 3846972 (hereinafter simply referred to as a prior patent) is a prior example that prevents the flow of groundwater from being blocked or narrowed.
Japanese Patent No. 3846972

This prior patent is a method for constructing a structure for preventing the flow inhibition of groundwater that occurs in a tunnel constructed based on underground excavation in a non-open-cut state,
Using a segment piece that has a grout hole and a unit water pipe that extends from the vicinity of the circumferential connection surface on one side to the vicinity of the circumferential connection on the other side through the grout hole, And assembling the segment ring so that the grout hole is located on the downstream side,
After injecting the grout material back through each grout hole, drilling from the grout hole on the upstream side of the groundwater flow to the depth according to the length of the water collection pipe, and fitting the water collection pipe into the hole formed by this, And drilling from the grout hole on the downstream side of the groundwater flow to the depth according to the length of the discharge pipe, fitting the discharge pipe into the hole formed thereby, and capping each grout hole,
Following this step or in equilibrium, the ends of adjacent unit water pipes are connected to each other via a connecting pipe, and are connected between the water collecting pipe and the water discharge at least under the tunnel inside the peripheral wall of the segment ring. A process of building an integrated water flow,
Is building a tunnel.

  In the above-mentioned prior patent, since the end portions of the adjacent unit water pipes are connected using a connecting pipe, the connecting pipe member is required, and thus the construction work is complicated. Yes. In addition, if clogging occurs in the groundwater channel, the flow of the groundwater may be hindered or the function of the groundwater may be reduced. There is no consideration of eliminating the problem and maintaining the performance.

  The present invention has been proposed in view of the above, and the object of the invention is to provide a water passage means for allowing ground water to flow inside the segment constituting the tunnel, and to remove clogging of the water passage means. An object of the present invention is to provide a water permeable segment that can maintain performance over a long period of time and has a simple configuration and excellent maintainability, and a tunnel using the water permeable segment.

The invention according to claim 1 is a segment used in a tunnel constructed in a ground where a groundwater flow exists, and a water passage means serving as a groundwater passage is provided inside the segment body, and the thickness of the segment body A guide pipe that is substantially perpendicular to and communicates with the water passage means is provided in the vertical direction, the guide pipe has a water stop cock that is detachable near the inner surface of the segment main body, and the segment main body includes the segment pipe A cleaning pipe having one end communicating with the water passage means in the main body is provided, the other end of the cleaning pipe is provided on the inner surface side of the segment body, and a removable water stop cock for maintenance is provided. And water stop means for preventing leakage of groundwater passing through the water passage means on the segment body joint surface.
According to a second aspect of the present invention, there is provided the water permeable segment according to the first aspect, wherein the water permeable segment is a concrete segment, a synthetic segment in which the other segment main body is fitted to one of the adjacent segment main bodies, and a ductile. It consists of a cast iron segment or a steel segment.
According to a third aspect of the present invention, in the water permeable segment according to the second aspect, the synthetic segment has an adjacent first segment main body and a substantially central portion in the second segment main body facing and connected to the first segment main body. Are provided with first and second water-passing means, respectively, and substantially cylindrical first and second protrusions project from the respective end faces of the first and second segment bodies on the connection side. Projections of the first and second water passage means are accommodated in the first and second protrusions, respectively, and the end surfaces of the first protrusion and the first water passage means and the fitting method thereof. The second projecting portion to be joined and the end surface of the first water passage means projecting portion are joined by an inclined surface, and the first and second water passage means communicate with each other.
The invention according to claim 4 is a segment used in a tunnel constructed on the ground where the groundwater flows, wherein a water passage means serving as a groundwater passage is provided inside the segment body, and the thickness of the segment body A guide pipe that is substantially perpendicular to and communicates with the water passage means is provided in the vertical direction, the guide pipe has a water stop cock that is detachable near the inner surface of the segment main body, and the segment main body includes the segment pipe A cleaning pipe having one end communicating with the water passage means in the main body is provided, the other end of the cleaning pipe is provided on the inner surface side of the segment body, and a removable water stop cock for maintenance is provided. And a tunnel constructed using a water permeable segment provided with a water stop means for preventing leakage of groundwater passing through the water flow means on the joint surface of the segment main body. Projecting from the outer surface of the segment through the guide pipe provided in the segment to the ground, a water pipe having a ground water passage and a drain pipe for draining the introduced ground water are provided, and the water pipe is provided upstream of the ground water. The drainage pipe is provided on the downstream side.
According to a fifth aspect of the present invention, in the tunnel according to the fourth aspect, a detachable filter for preventing clogging is provided in the water flow pipe and / or the drain pipe.
According to a sixth aspect of the present invention, in the tunnel according to the fourth aspect, a segment other than a segment assembled in the vicinity of the top portion of the segments constituting the tunnel is the water permeable segment.
According to a seventh aspect of the present invention, in the tunnel according to the fourth aspect, the water passing means provided in the water permeable segment is provided in the circumferential direction of the tunnel, and the water passing means is provided at intervals in the tunnel axial direction. Each water passing means is connected by a horizontal pipe provided in the tunnel axis direction.
According to an eighth aspect of the present invention, in the tunnel according to the fourth aspect of the present invention, a connecting pipe for connecting a water flow means located on the upstream side of the ground water and a water flow means on the drain side located on the downstream side of the ground water in the lower part of the tunnel. Is provided.
A ninth aspect of the present invention is the tunnel according to the eighth aspect, characterized in that a storage groove extending along the tunnel axial direction is provided at a substantially central portion of the connecting pipe.
According to a tenth aspect of the present invention, in the tunnel according to the ninth aspect, the tunnels are provided close to each other, and the pipes in the segments of the respective tunnels are connected to allow water to pass therethrough.

Since tunnels built in the groundwater vein strata cause various harmful effects, a water passage is provided so as not to block the flow of groundwater. Such tunnels are required to maintain their performance over time. However, depending on aged use and soil conditions, if fine sediment, dirt, water scale, etc. settles and adheres to the inside of the water channel and clogs the pipes, the flow of groundwater is obstructed and the function deteriorates. In this case, the flow of groundwater will have a major impact on the surrounding environment, such as well drainage and spring depletion in the area downstream of the tunnel, river water volume reduction, and forest tree dying due to groundwater level reduction.
According to the water permeable segment of the present invention and the tunnel using the water permeable segment, a cleaning pipe that communicates with the water flow means is provided in the segment body so that maintenance of the water flow path of the water permeable segment can be performed from the inside. Since the water-stopper for cleaning that is detachable is provided on the inside, the water passage can be easily cleaned from the inside, and the function can be maintained over time.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a tunnel in which a water permeable segment according to the present invention is constructed in the ground. In this example, the tunnel has a substantially circular cross section.

  The circular tunnel 1 is constructed by assembling a plurality of arc-shaped water permeable segments. The segment main body 2a is provided with a pipe 3 in the segment that serves as a passage for the introduced groundwater and functions as a means for groundwater flow, and is provided on one side (right side in the figure) of the tunnel 1 2a is provided with a plurality of pipe-shaped water pipes 5 for introducing the groundwater 4 into the intra-segment pipe 3, and the introduced groundwater 4 is supplied to the segment body 2a on the other side (left side in the figure). A drain pipe 6 for discharging into the ground B is provided, and the water permeable segment 2 is configured. One side of the tunnel 1 faces the upstream side of the groundwater, and the other side is located on the downstream side of the groundwater. The number, length, diameter, and the like of these water pipes 5 and drain pipes 6 are designed according to the amount of groundwater flowing. Further, a road bed 101 whose upper surface is a pavement 102 is provided in the lower part of the tunnel 1, and preferably, in this part, the segment pipe 3 on one side and the segment pipe 3 on the other drain side are provided. A connecting pipe 7 for connecting the two is provided. This connecting pipe 7 is for promptly guiding the groundwater introduced into the water permeable segment 2 to the drainage side, but may not be necessary. Further, as the water permeable segment 2 constituting the tunnel 1, the water pipe 5 and the drain pipe 6 are not necessary, and there are only the pipes 3 in the segment. In addition, you may use the tunnel of this invention in combination with the normal segment (not shown) which does not have piping in a segment. In particular, a key segment incorporated at the top may not be provided with an in-segment pipe.

  The surface of the water pipe 5 is provided with a slit 8 for introducing ground water into the ground water passage, and a filter 9 for preventing the water pipe 5 from being clogged. As will be described later, the filter 9 and the like are configured to be exchangeable from the inside of the tunnel when fine earth and sand are accumulated and clogged due to aging. Similarly, the drain pipe 6 is provided with a slit 8, a filter 9 and the like for discharging groundwater. As a result, the water permeability of the groundwater can be maintained over time. The detailed configuration will be described later with reference to FIGS. Note that the filter 9 may not be provided depending on the surrounding environment such as the ground.

  FIG. 2 is a further explanatory view of the state of FIG. 1 and is a schematic partial cross-sectional view of the tunnel 1 in the radial direction.

  An in-segment pipe 3 that is provided at substantially the center of the arc-shaped water-permeable segment 2 and functions as groundwater water passing means is provided along the circumferential direction of the cylindrical structure. The in-segment pipe 3 is usually made of a steel pipe or a synthetic resin pipe. An outer seal groove 3a and an inner seal groove 3b for providing a seal for preventing water leakage are provided on the adjacent surface of this segment and the adjacent segment (shown on the right side in FIG. 2). This is because when the segments are connected, water leakage from each segment end face of the connecting portion is prevented.

  A cleaning pipe 10 for maintenance for cleaning the inside of the intra-segment pipe 3 is provided at an appropriate location of the intra-segment pipe 3. The inner end portion communicates with the segment internal pipe 3 and the other end portion is provided in the cleaning hole 11 provided on the inner surface side of the segment main body 2a, and the other end portion of the cleaning pipe 10 facing the cleaning hole 11 is provided. A cleaning cock screw portion 10a is formed on the outer periphery, and a cleaning cock 12 is detachably attached.

  Further, as shown on the left side in FIG. 2, the segment inner pipe seal groove 3 c is provided on the end face between the segment main bodies 2 a where the segment inner pipe 3 is provided, and the adjacent segment inner pipes 3 are connected together. Further, there is a water stop means for stopping the water by attaching a seal to the pipe seal groove 3c in the segment so that the taken-in groundwater does not leak at the end. Thus, in this invention, the water stop means which prevents the leakage of the groundwater which passes the inside of a water flow means in the segment main body joint surface is provided.

  In FIG. 2, reference numeral 13 denotes a through pipe extending in the thickness direction of the water permeable segment 2 from the inner surface to the outer surface of the water permeable segment 2. is doing. The number, position, pipe diameter, and the like of the through pipe 13 and the in-segment pipe 3 are appropriately designed as necessary.

  FIG. 3A is an end view seen from the direction A in FIG. 2 and shows an explanatory diagram in a state in which the water pipe 5 is provided in the through pipe 13. In the substantially central portion of the segment main body 2a of the water permeable segment 2, substantially cylindrical pipes 3 within the segment as shown in FIG. The cylindrical through pipe 13 is provided on the inner peripheral surface of the through hole 14, and the base of the water pipe 5 and the drain pipe 6 is inserted and attached inside the through pipe 13 as a guide pipe. The through pipe 13 and the in-segment pipe 3 intersect each other substantially orthogonally and communicate with each other. A filter 9 for preventing clogging is provided inside the water pipe 5 and the drain pipe 6 provided in the radial direction so as to protrude from the outer peripheral surface of the segment. Further, a detachable water stop cock 15 having a screw structure is provided on the bottom side of the through pipe 13, that is, on the inner side of the segment. The filter 9 can be replaced by removing the water stop cock 15. In addition, in FIG. 3 (a), 3a ′ and 3b ′ are the outer seal groove 3a and the outer seal and inner seal provided in the inner seal groove 3b shown in FIG. It is for preventing.

  In construction, in the present invention, a tunnel 1 is constructed by assembling concrete permeable segments 2 via an erector while excavating a horizontal pit into the ground by a shield method or the like. Each water-permeable segment 2 is connected by a well-known appropriate joint means, and the internal segment piping 3 can be easily connected by joining without using a connecting pipe. The tunnel 1 is constructed by combining a water permeable segment 2 having a water pipe 5 and a drain pipe 6 and a water permeable segment 2 having no water pipe 5 and drain pipe 6 and having only a pipe 3 in the segment. There is also an example in which the permeable segment 2 is not used at the top of the tunnel. Although the sectional shape of the tunnel 1 in the illustrated example is circular, the tunnel 1 having an oval shape, an elliptical shape, a horseshoe shape, a substantially rectangular shape, or the like can be constructed by appropriately selecting and combining the sectional shapes of the segments.

  When the tunnel 1 is on the ground c and located on the ground B, the stop cock 15 shown in FIG. 3A is removed from the inside of the tunnel to a desired location of the tunnel 1, and the through pipe 13 is formed from the inside of the tunnel 1. The water pipe 5 and the drain pipe 6 are projected in a substantially radial direction toward the outside of the tunnel 1. As shown in FIG. 1, the water pipe 5 protrudes on the upstream side of the groundwater (right side in FIG. 1), and the drain pipe 6 protrudes on the downstream side.

  The optimum number and length of the water pipes 5 and drain pipes 6 are selected according to the condition of the ground B, the scale of the tunnel 1 and the like. The water pipe 5 and the drain pipe 6 are communicated with the intra-segment pipe 3. A filter 9 is provided inside the water pipe 5 and the drain pipe 6 as necessary.

  When the projecting work of the water pipe 5 and the drain pipe 6 and the insertion work of the filter 9 are completed, a water stop cock 15 is provided at the bottom of the through pipe 13.

  FIG. 4 shows the detailed configuration and operation of the water pipe 5.

  A large number of appropriately shaped slits 8 are provided on the surface of the water pipe 5, and in the state shown in the figure, the groundwater 4 flowing from the right side to the left side passes through these slits 8 to the inside of the water pipe 5. To be introduced. In this case, a hole may be used instead of the slit 8. The drain pipe 6 is similarly configured. The introduced groundwater 4 passes through a replaceable filter 9 made of fiber, porous resin, etc., and water leakage into the tunnel is prevented by a water stopcock 15, and moves to an in-segment pipe 3 that is substantially orthogonal to the water pipe 5. Then, it flows to the drain pipe 6 side and is drained into the ground. In the figure, reference numeral 16 denotes backfilling injected into the outer peripheral portion of the water permeable segment 2. Reference numeral 15a denotes a screw portion for attaching / detaching the water stopper.

  FIG. 5 is a development view of the water permeable segment 2, and is an arrangement example of the in-segment pipe 3 and the through pipe 13 provided inside. In FIG. 4, the groundwater 4 introduced from the water pipe 5 flows through the intra-segment pipe 3 via the through pipe 13 as shown in FIG. In this example, the in-segment pipes 3 provided at appropriate intervals in the tunnel axis direction are connected to each other by a horizontal pipe 17 arranged in a direction substantially orthogonal thereto, and introduced into the in-segment pipe 3 through the water flow pipe 5. The groundwater is allowed to flow quickly and efficiently to the drain pipe 6 side. The horizontal pipes 17 are arranged as shown in the upper side of the water permeable segment 2 so as to connect the separated pipes 3 in the segment, or connect the pipes 3 in the segments as shown in the lower side. However, various aspects such as opening from one end of the water-permeable segment 2 to the other end using the end horizontal pipes 18a and 18b and connecting with other members are conceivable. In this case, an end horizontal pipe sealing groove a for preventing water leakage when other water permeable segments 2 are connected is provided around the end horizontal pipes 18a and 18b opened at one end and the other end of the water permeable segment 2, respectively. In some cases, the horizontal tube 17 is not necessarily provided.

  The filter 9 in the water pipe 5 or the drain pipe 6 may be clogged depending on the use over time or the soil condition of the ground. In this case, the maintenance stop cock 15 is removed from the tunnel, the filter 9 is taken out and replaced with a new one. Or you may reuse the thing after cleaning.

  Next, the case where the inside of the segment piping 3 is cleaned will be described.

  As shown in FIG. 2, a cleaning pipe 10 for maintenance is connected to the intra-segment pipe 3. This cleaning pipe 10 is rubbed from the inner surface of the water permeable segment with a gentle curvature to the pipe 3 in the segment. When cleaning, the water stopcock 12 for cleaning is removed from the inner surface side of the water-permeable segment 2, that is, the inside of the tunnel, and a cleaning pipe of a cleaning device (not shown) is inserted.

  In this case, the cleaning pipe 10 is gently attached to the intra-segment pipe 3, so that the cleaning pipe of the cleaning device can be smoothly inserted into the intra-segment pipe 3 to enter the intra-segment pipe 3. Can do.

  For example, it is preferable to use a cleaning pipe made of a flexible hose or pipe and having a jet nozzle at the tip. In cleaning, cleaning water may be jetted to clean the inside of the segment piping 3.

  Excess water at the time of cleaning, sedimentary sediment inside, and the like are discharged to the outside through the cleaning hole 11 together with the excess water. In the present invention, it can be easily cleaned in this way.

  After the cleaning is completed, the cleaning device is removed, and the cleaning stop cock 12 is screwed into the opening of the cleaning pipe.

  FIG. 6 shows a second embodiment of the present invention. In the tunnel 1A of this embodiment, a cylindrical storage groove 7A extending substantially parallel to the tunnel axis direction is provided in the substantially central portion of the connecting pipe 7 shown in FIG. It is characterized in that the groundwater introduced into the connecting pipe 7 through the intra-segment pipe 3 is temporarily stored. This storage groove 7A acts as a buffer. Other configurations and operations are the same as those of the first embodiment shown in FIG.

  FIG. 7 shows that when two tunnels 1A going up and down the road in the second embodiment are constructed in the ground, the connecting pipe 7 of each adjacent tunnel 1A is connected by an intermediate water pipe 7a, and in the state shown in the right side The groundwater introduced to the first tunnel 1A side located at the side of the second tunnel 1A is also flown to the second tunnel 1A side located on the left side, and can be drained into the ground even from the drain pipe 6 on the second tunnel 1A side. Is. In this case, drainage can be performed quickly.

  The intermediate water conduit 7a may be connected by installing a pipe by a small diameter propulsion method, a curve propulsion method, or the like.

  Of course, the drain pipe 6 of the first tunnel 1A and the water pipe 5 of the second tunnel 1A may be installed so as not to collide.

  In the illustrated example, the first and second tunnels 1A are installed in the ground. However, the third tunnel 1A and the like are further installed, and the intermediate water pipe 7a is used for the second upstream of the groundwater. You may make it connect with 2 tunnel 1A.

  In the first embodiment shown in FIG. 1 and the like described above, the water permeable segment is provided with an in-segment pipe 3, a through pipe 13 and the like as water passing means, and adjacent segments are connected by a generally known connecting means. Although it is made of concrete that can be connected, FIG. 8 is an example of a synthetic segment made of concrete whose connection method is a fitting type. That is, FIG. 8A is an example of a composite segment by a fitting method suitable for use in the present invention, and shows a developed view of the peripheral surface of the segment. This development of the peripheral surface shows a portion near the joint of the two water permeable segments.

  An in-segment pipe a is provided at substantially the center of one segment main body A (left side in the figure), and an intra-segment pipe b is provided at substantially the same central part of the other segment main body B (right side in the figure). . And the junction part of these segment piping a and the segment piping b has protruded outside from the junction part side end surface a1 of the segment main body A, and the junction part side end surface of the segment main body B which opposes this.

  A cylindrical projecting portion 20a made of steel or cast iron is provided on the joint-side end surface a1 of the segment main body A, and the projecting portion of the intra-segment pipe a is located in the projecting portion 20a to be protected.

  Similarly, a projection 20b is also provided on the joint-side end surface b1 of the other segment main body B facing the one segment main body A, and the protrusion of the intra-segment pipe b is located in the projection 20b to be protected. .

  The projecting portion 20a on the segment main body A side and the end surface of the intra-segment pipe a housed therein are flush with each other. Further, the projection 20b on the side of the segment main body B and the end surface of the in-segment pipe b accommodated in the segment main body B are flush with each other, and in FIG. On the other hand, if the other segment main body A is pushed in and inserted in the direction indicated by the arrow, it is joined at the mutually inclined surfaces, and the pipes a and b in the segment communicate with each other.

  In this case, if the seal 26 is attached to the joining surface of at least one of the projecting portions 20a or 20b, leakage of groundwater passing through the joined intra-segment pipes a and b can be prevented. Thus, also in this embodiment, the water stop means for preventing leakage of groundwater passing through the water passage means at the segment body joint surface is provided. Further, since the seal 26 surface and the mating joint surface are not rubbed, they are hardly damaged.

  In this way, the water permeable segment is configured. Also in the water permeable segment of this embodiment, although not particularly shown, a cleaning pipe, a water pipe, and a drain pipe are provided at appropriate positions in the same manner as in the first and second embodiments. In addition, a water stop cock for maintenance is also provided.

The protrusions 20a and 20b are fixed to the web material of the H-shaped frame material of the segment by, for example, welding or bolts. That is, in FIG. 8A, 21 is a steel frame web provided on the outer periphery of each segment main body A, B. Reference numeral 22 denotes a steel frame flange provided in the joint direction of the segment main bodies A and B. Reference numeral 23 denotes a joint plate that is provided on each joint side of the segment main bodies A and B, and is a joint plate for connecting the two, and a plurality of fitting holes 25 for fitting the fitting pins 24 are formed at the tips, and the fitting pins 24 are inserted into the holes 25. By doing so, the segment bodies A and B are integrated.
In this embodiment, the example in which the interval between the joint portions of the composite segment is wide is described. However, when the interval between the joints is very close, the water stop such as a seal on the joint surface as in the first embodiment. Means can be provided to deal with it.

  FIG.8 (b) shows the MM cross section in Fig.8 (a).

  FIG. 9 shows another example of a water permeable segment made of a steel segment which is a constituent member of a tunnel such as a tunnel. The water permeable segment 30 functions as a pipe in the segment in the first embodiment on the joint plate 31 inside the steel segment main body 30a having a substantially rectangular cross section and whose surface is rust-proofed. A water flow part 35 for passing water is provided, and the inner end part of the water flow pipe 5 configured in the same manner as in the first embodiment is connected to the water flow part 35 which is the water flow means. This is a segment in which water is introduced to the drain pipe (not shown in this example) through the water pipe 5 and drained to the outside. In the illustrated state, the water permeable segment 30 is arranged such that the upper side faces the face and the lower side faces the wellhead. In other words, when the tunnel is constructed by assembling the water permeable segments, the water passing portion 35 is provided in the circumferential direction of the tunnel with an interval.

  In the figure, 33 is a segment main girder, 34 is a segment steel plate, 32 is a water passage space in the segment, 36 is a segment main girder, 37 is a water stop cock, and 37a is a screw part for attaching / detaching the water stop cock. 38 is a backfill injected outside the segment steel plate 34, and 39 is a guide pipe for attaching the water flow pipe 5, provided on the outer surface side of the water permeable segment 30, on the bottom side of the guide pipe 39, A detachable water stop cock 37 is provided in the vicinity of the inner surface side (inner side of the tunnel). The guide tube 39 corresponds to the through tube of the first embodiment. Although not particularly shown in this embodiment, a cleaning pipe or the like having a detachable maintenance stop cock is connected to the water passage 35 as in the first embodiment.

  Also in this embodiment, although not particularly shown, a water stop means is provided to prevent leakage of groundwater passing through the water passage means on the segment joint surface using grooves and seals as in the above-described embodiment. Also in this embodiment, the effect of the tunnel on the ground water when constructed in the ground B shown in FIG. 1 is substantially the same as that of the first embodiment.

  The replacement of the filter 9 in the water flow pipe 5 and the cleaning of the water flow part 35 in the aging use may be performed by removing the stop cock 37 and the like, and maintenance can be easily performed. Moreover, if the piping for cleaning is provided like the 1st Example, the water stop part can be removed and the water flow part 35 can be cleaned.

  FIG. 10 shows still another example of the water permeable segment made of the steel segment of the present invention.

  In this example, the water-permeable segment 40 is configured by filling a steel segment main body 40a with a filler 41 such as concrete.

  That is, the water-permeable segment 40 is configured by filling the filler 41 between the outer segment main girder 42 and the inner side of the segment steel plate 43 and the anti-corrosion-treated pipe 44 in the segment.

  A backing material 38 is injected to the outside of the segment steel plate 43 constituting the water permeable segment 40, and a water stopcock 45 detachable by a screw portion 45 a is provided near the inner surface side (tunnel inside) of the water permeable segment 40. . A water pipe 5 is provided on the opposite side of the stop cock 45. The water pipe 5 is provided on the outer surface side of the water permeable segment 40 via a guide pipe 46. A water stopcock 45 is provided on the bottom side of the guide tube 46 and on the inner surface side of the water permeable segment 40. When installing the water pipe 5 on the outer surface of the underground structure using the water permeable segment 40 provided in the ground B, the work can be performed by removing the stop cock 45. The same applies to the fourth embodiment described above. In this embodiment, although not particularly shown, a water stop means is provided to prevent leakage of groundwater passing through the water passage means on the segment joint surface using grooves and seals as in the above-described embodiment.

  The action and effect on the groundwater when the underground structure constructed using the water permeable segment 40 having the water pipe 5 is installed in the ground shown in FIG. 1 is substantially the same as that of the first embodiment.

  Further, the replacement of the filter 9 in the water passage 5 and the cleaning of the pipe 44 in the segment that is a water passage means can be performed by removing the water stopcock 45 as in the fourth embodiment. Cleaning pipes and stop cocks (both not shown) are provided, and maintenance can be performed as in the fourth embodiment.

  FIGS. 11A to 11D show a sixth embodiment of the present invention. The sixth embodiment is substantially similar to the first embodiment shown in FIGS. 11A is a cross-sectional view in the tunnel radial direction for showing the internal structure, FIG. 11B is a developed view of the circumferential surface of the water permeable segment, FIG. 11C is a side cross-sectional view of FIG. 11B, and FIG. It is.

  (A) In the figure, 50 is a water-permeable segment made of a steel segment, 51 is a steel skin plate on the outer surface of the segment body, 52 is a longitudinal rib for reinforcement, 53 is a segment joint plate, 54 is a segment seal, Adjacent water-permeable segments 50 are connected to each other through a segment joint plate 53. Reference numeral 55 is a guide pipe provided at an appropriate location, and is provided to intersect with the water pipe 56 substantially perpendicularly to the pipe in the segment of the first embodiment, that is, the water pipe 56 that functions as a groundwater water passage means. is doing. A water stop cock 57 is provided on the bottom side of the guide tube 55 and is detachably provided near the inner surface side of the water permeable segment 50. The guide pipe 55 corresponds to the through pipe of the first embodiment, and the water pipe 5 and the drain pipe 6 are connected thereto. Reference numeral 58 denotes a vertical pipe for connecting to another water flow pipe 56.

  In FIGS. 5B and 5C, 58a is a reinforcing horizontal rib, 59 is a cleaning pipe having an inner end connected to an appropriate portion of the water flow pipe 56, and an outer end for detachable cleaning. A stop cock 59a is provided. The operation of the cleaning pipe 59 is substantially the same as that of the first embodiment.

  (D) In the figure, 60 is a water flow pipe seal groove, and a water flow pipe 56 is provided inside. The seal groove 60 is provided with a seal to constitute a water stop means. 61 is a segment seal groove.

  In addition, illustration is abbreviate | omitted about the system of a segment coupling and a ring coupling. Especially in the case of high-rigidity joints, ductiles and steel fittings are used. Therefore, by attaching a seal to the water passage piping seal groove 60 and stopping the water, it is possible to prevent the corrosion of the segment fittings. You can pass groundwater from the ground. This water permeable segment 50 can also maintain and protect the water environment around the tunnel.

  A tunnel constructed in the ground may have a straight line portion, a bent meander portion, or may be branched and branched at a certain point. Therefore, the tunnel is constructed by selecting an appropriate permeable segment accordingly and combining that segment or other common appropriate segments. Thus, the tunnel is made of the concrete permeable segment of the first embodiment shown in FIG. 1, the synthetic segment of the fitting method shown in FIG. 8, and / or the steel segment shown in FIGS. It is constructed by appropriately combining ductile cast iron segments etc. according to construction conditions. Moreover, it may be constructed by selecting any one of various types of water permeable segments.

Sectional drawing at the time of using the underground structure formed using the water-permeable segment of 1st Example of this invention as a tunnel is shown. Partial sectional explanatory drawing same as the above. (A) is AA sectional drawing in FIG. 2, (b) shows the clarification figure of piping in a segment. Explanatory drawing which shows the structure of the water flow pipe used by this invention is shown. The expansion | deployment explanatory drawing of the surrounding surface of a water-permeable segment is shown. Sectional drawing at the time of using the underground structure which concerns on 2nd Example of this invention as a tunnel is shown. Explanatory drawing of the use condition of 2nd Example of this invention is shown. (A) is explanatory drawing of the surrounding surface expansion | deployment of the synthetic segment by the fitting system of 3rd Example of this invention, (b) shows the MM cross section in (a). It is a water-permeable segment of the 4th example of the present invention. It is a water-permeable segment of the 5th example of the present invention. It is 6th Example of this invention, Comprising: (a) is sectional drawing of the longitudinal direction of the water-permeable segment arranged continuously, (b) is a circumferential surface expansion explanatory view of the water-permeable segment same as the above, (c) is side sectional drawing same as the above. The figure and (d) show a side view. A conventional example is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Tunnel 2 Permeable segment 2a Segment main body 3 Segment piping 3a Outer sealing groove 3b Inner sealing groove 3c In-segment piping sealing groove 4 Ground water 5 Water pipe 6 Drain pipe 7 Connection pipe 7A Reservation groove 7a Intermediate water pipe 8 Slit 9 Filter DESCRIPTION OF SYMBOLS 10 Cleaning piping 10a Cleaning faucet screw part 11 Cleaning hole 12 Cleaning faucet 13 Through pipe 14 Through hole 15 Stop cock 15a Screw part 16 Backing 17 Horizontal pipe 18a End horizontal pipe 18b End horizontal pipe 20a, 20b Projection part 21 Steel frame web 22 Steel frame flange 23 Joint plate 24 Fitting pin 25 Fitting hole

DESCRIPTION OF SYMBOLS 30 Water-permeable segment 30a Steel segment main body 31 Joint plate 32 Water flow space 33 Segment main girder 34 Segment steel plate 35 Water flow part 36 Segment main girder 37 Stop cock 37a Screw part 38 Backing

40 Water-permeable segment 40a Steel segment body 41 Filler 42 Segment main girder 43 Segment steel plate 44 In-segment piping 45 Stop cock 46 Guide tube

DESCRIPTION OF SYMBOLS 50 Water-permeable segment 51 Skin plate 52 Vertical rib 53 Segment joint board 54 Segment seal 55 Guide pipe 56 Water flow pipe 57 Water stopcock 58 Vertical pipe 58a Horizontal rib 59 Cleaning pipe 59a Cleaning water stop valve 60 Water supply pipe seal groove 61 Segment seal groove

Claims (10)

A segment used for tunnels built on ground where groundwater flows.
Inside the segment body is provided with a water passage means that serves as a groundwater passage, and in the thickness direction of the segment body, a guide pipe that is substantially orthogonal to and communicates with the water passage means is provided. The segment body has a water stop cock detachable near the inner surface of the segment body, and the segment body is provided with a cleaning pipe having one end communicating with the water passage means in the segment body. The end is erected on the inner surface side of the segment main body, a detachable water stop cock is provided for maintenance, and a water stop means for preventing leakage of groundwater passing through the water flow means on the segment main body joint surface is provided. Permeable segment characterized by that. In the water permeable segment according to claim 1,
The water permeable segment is composed of a concrete segment, a synthetic segment, a ductile iron segment, or a steel segment into which the other segment main body is fitted to one of the adjacent segment main bodies. The water permeable segment according to claim 2,
The synthetic segment is provided with first and second water-passing means in the first segment main body adjacent to the first segment main body and the second segment main body facing the first segment main body and connected by a fitting method, respectively. The first and second projecting portions, which are substantially cylindrical, project from the end surfaces on the connection side of the first and second segment bodies, and the first and second passages are respectively provided in the first and second projecting portions. The protrusion of the water means is housed, and the first protrusion and the end face of the first water passage means protrusion, and the second protrusion and the first water passage means protrusion joined to the end surface by a fitting method. A water permeable segment characterized in that the first and second water passage means communicate with each other at an inclined surface with the end surface of the portion. A segment used for tunnels built on ground where groundwater flows.
Inside the segment body is provided with a water passage means that serves as a groundwater passage, and in the thickness direction of the segment body, a guide pipe that is substantially orthogonal to and communicates with the water passage means is provided. The segment body has a water stop cock detachable near the inner surface of the segment body, and the segment body is provided with a cleaning pipe having one end communicating with the water passage means in the segment body. The end is erected on the inner surface side of the segment main body, a detachable water stop cock is provided for maintenance, and a water stop means for preventing leakage of groundwater passing through the water flow means on the segment main body joint surface is provided. A tunnel constructed using permeable segments,
Projecting from the outer surface of the segment through the guide pipe provided in the water permeable segment to the ground, a water pipe having a groundwater passage and a drain pipe for draining the introduced groundwater are provided.
A tunnel characterized in that the water pipe is provided on the upstream side of the groundwater and the drain pipe is provided on the downstream side.   5. The tunnel according to claim 4, wherein a detachable filter for preventing clogging is provided in the water pipe and / or the drain pipe.   The tunnel according to claim 4, wherein, among the segments constituting the tunnel, other segments excluding the segment assembled near the top are the water permeable segments. In the tunnel of claim 4,
The water passing means provided in the water permeable segment are provided in the circumferential direction of the tunnel, and the water passing means are provided at intervals in the tunnel axis direction, and each water passing means is provided in the tunnel axis direction. A tunnel characterized by being connected by a horizontal pipe. In the tunnel of claim 4,
A tunnel characterized in that a connecting pipe is provided at a lower portion of the tunnel to connect a water flow means located on the upstream side of the ground water and a water flow means on the drain side located on the downstream side of the ground water. The tunnel according to claim 8,
A tunnel characterized in that a storage groove extending along the tunnel axis direction is provided in a substantially central portion of the connecting pipe.   The tunnel according to claim 9, wherein the tunnels are adjacent to each other, and the pipes in the segments of each tunnel are connected to allow water to pass therethrough.

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