JP4609712B2 - Filling means for filling cavities and filling method - Google Patents

Description

  The present invention relates to a filling means and a filling method for filling a cavity formed between a backside of a tunnel lining concrete and a natural ground, and more specifically, filling a filling material into a cavity at a top end portion in a limited manner. The present invention relates to a filling means and a filling method for filling a cavity with a filler.

  A tunnel constructed before the introduction of the NATM (New Australian Tunneling Method) method, that is, a tunnel 11 constructed by a sheet pile method as shown in FIG. 12, includes a steel support or a wooden sheet pile (not shown). ) Often hinders the formation of a cavity 13 between the back surface of the lining concrete 12 and the natural ground 10. In particular, this tendency is strong in the top end portion 13a on the back surface of the lining concrete 12.

  Here, FIG. 12 is a cross-sectional view showing the cavity 13 formed on the lining back surface of the conventional tunnel 11, and is a vertical cross-sectional view with respect to the longitudinal direction (depth direction) of the tunnel 11.

  When the hollow 13 is present, if the geological condition of the natural ground 10 is poor, the natural ground 10 near the top end portion 13a and the side portion 13b expands or the loose natural ground 10 becomes the lining concrete 12. The back surface and the inner surface of the lining concrete 12 may be destroyed by collapsing the top end portion 13a.

  In addition, when the cavity 13 exists, the contact state between the natural ground 10 and the lining concrete 12 becomes irregular, so that the earth pressure is always applied to the lining concrete 12 or the arching action of the lining concrete 12 is sufficiently performed. The result cannot be expected.

  Therefore, since the cavity 13 has a negative effect on the stability of the tunnel 11, as shown in FIG. 13, the cavity 13 is filled with a predetermined filler 14 via the injection pipe 15 by pumping. Then, it is necessary to fill the cavity 13 by hardening and to integrate the natural ground 10 and the lining concrete 12 at an early stage. Here, FIG. 13 is a cross-sectional view showing a state in which the cavity 13 is filled with the filler 14.

  Such a filler 14 is required to have a property of filling and hardening the cavity 13 without contracting in the cavity 13 after filling. Conventionally, as such a filler 14, for example, air mortar, air milk, foamed polyurethane, or the like has been used.

  In addition, as a related prior art, a bag body is loaded into a gap between a steel support built in an underground cavity such as a tunnel, a natural ground, and an auxiliary construction method steel material, and the filler is pressurized into the bag body. There has been proposed a technique of filling the gap and injecting it to preload between the steel support, the natural ground, and the auxiliary construction steel (for example, see Patent Document 1).

  As another related prior art, a method of adhering between a support work installed along the excavation surface of a hollow portion of the tunnel or the like and the excavation surface at the time of excavation work of the tunnel or the like has been proposed. (For example, see Patent Document 2).

  That is, this prior art interposes a bag body provided with a check valve for backflow prevention between a support work installed along the excavation surface of a hollow portion such as a tunnel and the excavation surface, A curable filler such as mortar to which a hardening accelerator is added is injected into the bag without adding a preload to both the support and the excavation surface.

JP-A-7-293195 JP 2000240395 A

  As described above, the method of filling the cavity existing on the back surface of the tunnel support (construction member) has been put into practical use, but in any case, even if limited filling is not possible with the conventional technology, Since the filling is limited to the inside of the bag, the application is limited to the local area, and if the application site is to be expanded, it is necessary to increase the cost due to the necessity of the bag. However, the cavity generated on the back of the tunnel lining may be a cavity with a certain level of spread. Means for filling the cavity more economically by limiting the filling location. Has not been provided yet.

  That is, when the filler 14 such as air mortar having high fluidity is used in the prior art, the filler 14 is applied to the side portion 13b of the target cavity 13 other than the top end portion 13a, cracks existing in the natural ground 10, and the like. In many cases, the filler 14 leaks out, or the filler 14 leaks from cracks or the like of the lining concrete 12.

  Thus, conventionally, since the filler 14 including the periphery of the target cavity 13 other than the top end portion 13a is filled, the amount of necessary materials and the construction time are increased, and the construction cost is high and the construction period is long. Was a factor. Such a problem is more serious when expensive foamed polyurethane or the like is used as the filler 14.

  The present invention has been made in view of the above, and it is possible to fill the filler in a limited manner, particularly in the top end portion of the cavity formed between the backside of the tunnel lining concrete and the natural ground. It is an object of the present invention to provide a means for filling a cavity of a filler that can be formed.

  Further, the present invention provides a filling material using a filling means capable of filling a filler to the top end portion of the cavity formed between the backside of the tunnel lining concrete and the natural ground in a limited manner. It aims at providing the filling method to a cavity.

In order to solve the above-mentioned problems and achieve the object, the filler filling means according to claim 1 of the present invention is a cavity formed between a tunnel construction member and its surrounding ground. A filling means for filling only a desired filling portion with a filling material, wherein the filling means is formed in a bag shape and expands by introducing a fluid therein, while the fluid is discharged. A bag-like weir that is formed so as to contract, and is disposed in the cavity in a contracted state, and then the fluid is introduced into the interior and expands to partition the desired filling point and other parts. A hole for a bag-like weir provided in the tunnel construction member so as to communicate with the cavity, and for introducing the bag-like weir into a predetermined position in the cavity in a contracted state; The tunnel structure Provided member, the filling hole for filling the filling material into the filling desired location, which was provided with the bag-like weir is formed by a resilient sheet with a reinforcing material, is expanded using After that, the fluid is discharged and taken out from the bag-like weir hole in a contracted state so as to be reusable .

According to a second aspect of the present invention, there is provided a method for filling a cavity with a filler, which is for filling a filler only in a desired portion of a cavity formed between a tunnel construction member and a surrounding ground. It is a filling method, which is formed by an elastic sheet provided with a reinforcing material, and expands when a fluid is introduced into the inside, while the fluid is discharged after being inflated and used from the bag-like weir hole in a contracted state. A bag-like weir hole drilling step for opening a bag-like weir hole in the tunnel construction member for introducing a bag-like weir formed to be reusable by being taken out into a predetermined position in the cavity, and the filling A filling hole drilling step for opening a filling hole for filling the filler in a desired location in the tunnel construction member, and introducing the bag-like weir hole into the cavity in a contracted state. A bag-like weir placed at a predetermined position An arrangement step, a bag-like weir expansion step for partitioning the desired filling portion and other portions by introducing the fluid into the bag-like weir arranged in the cavity and expanding the bag-like weir, and the filling A filling material filling step of filling a material into the filling desired portion from the filling hole, a bag-like weir shrinking step of discharging the fluid and shrinking the bag-like weir, and the shrinking bag-like weir in the bag And a bag-like dam collecting step of taking out and collecting from the hole for the dam-like dam.

According to the filling means for filling a cavity with a filler according to the present invention, the filler can be filled only in a desired filling portion, and in particular, the top end of the cavity can be filled in a limited and reliable manner. . Therefore, since the usage-amount of a filler can be reduced, a construction cost can be reduced and a construction period can be shortened.

Further , according to the filling means for filling the cavity of the filler according to the present invention, the bag-like weir can be used repeatedly, which is economical and can further reduce the construction cost.

Moreover, according to the filling means for filling the cavity of the filler according to the present invention, it can contribute to environmental conservation.

Moreover, according to the filling means for filling the cavities of the filler according to the present invention, the peelability from the filler after the predetermined curing is further improved, so that the bag-like weir can be easily collected.

Further , according to the filling method of the filling material into the cavity according to the present invention, the filling material can be filled only in the desired filling place, and in particular, the filling is limited and surely filled in the top end portion of the cavity. Can do. Therefore, since the usage-amount of a filler can be reduced, a construction cost can be reduced and a construction period can be shortened.

Further , according to the filling method of the filling material into the cavity according to the present invention, the bag-like dam can be easily recovered by shrinking the bag-like dam after the filling material filling step, and can be reused after the collection. Therefore, it is economical and the construction cost can be further reduced.

  Embodiments of a filling means and a filling method for filling a cavity of a filler according to the present invention will be described below in detail with reference to the drawings. In addition, although the example which applies this invention to the cavity of the lining back surface top end part in an existing tunnel is demonstrated, this invention is not limited by this Example. In the following description, the same or equivalent members as those already described are denoted by the same reference numerals, and redundant description is omitted or simplified.

  FIG. 1 is a cross-sectional view showing a tunnel 11 in which a cavity 13 in a top end portion 13a is filled with a filler 14 using a bag-like weir 20 according to an embodiment of the present invention, and FIG. FIG. 6 is a cross-sectional view showing the tunnel 11 provided with the filling holes 23, and is also a cross-sectional view showing a state in which the lining concrete (tunnel construction member) 12 shown in FIG. 4 described later is cut along the BB cross section.

  3 is a cross-sectional view showing a state in which the tunnel 11 shown in FIG. 2 is cut along AA. FIG. 4 shows the bag-like weir hole 22 and the filling hole 23 from the cavity 13 of the top end portion 13a. FIG. 5 is a sectional view showing the tunnel 11 in which the shrunk bag-like weir 20 is introduced into the cavity 13 from the bag-like weir hole 22, and FIG. 6 is a plan view of the lining concrete 12 shown in FIG. It is the top view seen from the cavity 13 of the edge part 13a.

  7 is a cross-sectional view showing the cavity 13 defined by the expanded bag-like dam 20, FIG. 8 is a plan view of the cavity 13 shown in FIG. 7, and FIG. 9 is a plan view of the cavity 13 shown in FIG. It is a top view and is a top view which shows a mode that the filler 14 is filled into the top end part 13a toward the upstream from the downstream of the tunnel 11. FIG.

  Here, upstream and downstream are defined as follows. That is, for example, in the case of a general road tunnel, the road surface in the tunnel extension direction always has a vertical gradient, and in that case, the tunnel cross section is almost the same, so the tunnel top end also has a vertical gradient. In this case, the high part at the top end is the upstream, and the low part is the downstream.

  FIG. 10 is a cross-sectional view showing the tunnel 11 in which the bag-like weir 20 is contracted after the filling material 14 is filled, and FIG. 11 is a plan view showing the filling material 14 limitedly filled in the cavity 13 of the top end portion 13a. 2 shows a state in which a part of the shrunk bag-like weir 20 is removed from the cavity 13.

  As shown in FIG. 1, the present embodiment fills a cavity 13 formed between the back surface of the lining concrete 12 of the existing tunnel 11 and the natural ground 10, particularly the top end portion (desired filling point) 13 a. The present invention relates to a filling means and a filling method for filling the material 14 in a limited manner.

  The filling means communicates with the cavity 13 in order to introduce the bag-like weir 20 described later and the bag-like weir 20 into a predetermined position (see FIGS. 4 to 6) in the cavity 30 in a contracted state. A bag-like weir hole 22 opened in the lining concrete 12 and a filling hole 23 opened in the lining concrete 12 so as to communicate with the cavity 13 in order to fill the top end portion 13a with the filler 14 I have.

  First, the bag-like weir 20 will be described. The bag-like weir 20 is formed in a bag-like shape, and is expanded so as to expand when a fluid is introduced into the bag-like weir 20 and is contracted when the fluid is discharged.

  That is, after the bag-like dam 20 is disposed in the cavity 13 in a contracted state, the fluid is introduced into the bag-like dam 20 and expands, whereby the top end portion 13a and the side portion (filling desired) This is a member for partitioning a portion other than the portion) 13b.

  The bag-like weir 20 is formed by an elastic sheet provided with a reinforcing material as a core material, and is reusable by being discharged from the bag-like weir hole 22 in a contracted state after the fluid is discharged after being inflated and used. Has been.

  That is, the bag-like weir 20 is formed of a structure and a material that are excellent in deformation characteristics so as to be in close contact with the lining concrete 12 and the natural ground 10 and that are not damaged by the pressure of the filler 14 or the fluid to be inserted therein.

  Further, the bag-like weir 20 may receive a predetermined pressure from the filler 14 or the natural ground 10 in an expanded state and may be in close contact with a sharp rock, and is reused a predetermined number of times under such conditions. Mechanical strength (for example, pressure resistance, abrasion resistance, tear resistance, etc.).

  Therefore, the bag-like weir 20 can be formed of a rubber sheet (elastic sheet) provided with a reinforcing material such as carbon fiber or Kevlar fiber as a core material. Thereby, a predetermined deformation characteristic and mechanical strength can be provided, and a highly reliable bag-like weir 20 can be obtained.

  When the bag-like weir 20 is reused a predetermined number of times, the bag-like weir 20 needs to have mechanical strength that can withstand reuse as described above. If not (embedded in the cavity 13), the strength of the bag-like weir 20 only needs to withstand at least until the filler 14 is cured.

  In addition, the bag-like weir 20 is provided with a predetermined check valve (not shown) at the inlet / outlet of the fluid in order to maintain the sealed state of the fluid when inflated. The inlet / outlet is provided with a socket (not shown) for detachably connecting a connecting pipe (not shown) from a pressure pump means for supplying the fluid to the bag-like weir 20.

  These check valves and sockets are configured by a known technique and may be configured separately, but the check valve may be incorporated in the socket. Further, the socket is disposed so as to be exposed to the inside of the tunnel 11 from the bag-like weir hole 22 so that it can be easily connected to the connection pipe from the pressure pump means.

  In addition, you may provide the said non-return valve in the connection piping side from the said pumping pump means instead of providing in the bag-like dam 20 side.

  The surface of the bag-like weir 20 is coated with, for example, a wax-based, polyvinyl alcohol-based or oil-based release agent. Thereby, since the peelability from the filler 14 after predetermined hardening improves further, the bag-like dam 20 can be made easy to collect | recover.

  Note that the bag-like weir 20 may be formed using a material having such a peelability as long as a predetermined mechanical strength, elastic force, or the like can be ensured.

  Moreover, air or water can be used for the fluid introduced into and discharged from the bag-like weir 20. This is because they have stable physical properties and are widely used, so that they are relatively easy to handle and can be used at low cost.

  Next, the bag-like weir hole 22 will be described. As shown in FIGS. 2 to 4, 8, and 9, the bag-like weir hole 22 is formed in the lining concrete 12 so as to surround the entire periphery of the desired filling portion (the top end portion 13 a) of the filler 14. Holes are drilled at a predetermined diameter and a predetermined pitch.

  The diameter of the bag-like weir hole 22 is set to a size that allows smooth operation when the bag-like weir 20 in a contracted state is introduced into the cavity 13 or removed from the cavity 13. The bag-like weir hole 22 is provided with a guide member (not shown) for guiding the bag-like weir 20 as necessary so that the introduction to the predetermined position and the removal work can be performed smoothly. Also good.

  As shown in FIG. 8, the pitch for providing the bag-like weir holes 22 is such that when the adjacent bag-like weirs 20 are inflated, both come into contact with each other with a constant pressure, and there is no gap in the contact portion. Set to distance.

  Further, the pitch is set in consideration of various conditions such as the range of the top end portion 13a to be filled with the filler 14, the size and strength of the bag-like weir 20, and the pressure received from the filler 14. Yes.

  Next, the filling hole 23 will be described. As shown in FIGS. 2 to 4, 8, and 9, the filling hole 23 is formed in the lining concrete 12 so as to be positioned substantially at the center of the desired filling portion (the top end portion 13 a) of the filler 14. Drilled at a predetermined pitch.

  Further, as shown in FIG. 9, the pitch at which the filling holes 23 are provided is filled from the injection pipe 15 (see FIG. 1) provided in the filling holes 23 from the downstream side to the upstream side of the tunnel 11. When the material 14 is injected, the distance is set such that the filling material 14 is efficiently and evenly filled in the desired filling position.

  Further, the pitch is determined by the range of the top end portion 13a to be filled with the filler 14, the viscosity and curing speed of the filler 14, the pumping speed of a pumping pump means (not shown) for pumping the filler 14, etc. It is set in consideration of various conditions.

  The injection pipe 15 is provided with a predetermined check valve (not shown) for preventing the backflow of the filler 14 and connecting piping from a pressure pump means for supplying the filler 14 to the top end portion 13a. A socket (not shown) is provided for detachably attaching (not shown). These check valves and sockets are configured by known techniques.

  The bag-like weir hole 22 and the filling hole 23 are efficiently drilled simultaneously by a drilling drill (not shown).

  Next, the filler 14 will be described. The filler 14 is not particularly limited as long as it has a property of filling and hardening the cavity 13 without contracting in the cavity 13 after filling, and a known material can be used. For example, air mortar, air milk, foamed polyurethane, or the like can be used.

  Further, for example, a known filler 14 using a predetermined water-absorbing polymer can be used so as to be surely filled even when there is spring water in the cavity 13. This filler 14 has high fluidity during pumping with a pump, but has the property of being self-supporting as it is after pumping, and also has the property that the material is difficult to separate even when touched by water. .

  For this reason, during pumping, it fills quickly to every corner of the top end part 13a, and when the pumping is stopped, the shape as it is can be maintained. Therefore, the filler 14 does not leak into the cracks in the natural ground 10 or the lining concrete 12 and can reliably fill only the top end portion 13a of the desired filling location. Moreover, since the material is difficult to separate even if it touches the spring water, the top end portion 13a can be reliably filled with a predetermined strength.

  Next, an operation procedure related to the above filling method will be described. First, in the bag-like weir hole drilling step and the filling hole drilling step, as shown in FIGS. 2 to 4, the bag-like weir hole 22 and the filling hole 23 are formed at predetermined locations of the lining concrete 12. Drilling simultaneously with a drilling drill (not shown).

  Then, in the next bag-like weir introduction and placement step, as shown in FIGS. 5 and 6, the bag-like weir 20 is introduced into the cavity 13 from the bag-like weir hole 22 in a contracted state and arranged at a predetermined position. Set up. As shown in FIG. 8, the disposition work at the predetermined position is performed so that the entire periphery of the top end portion 13a can be surrounded in a well-balanced manner when the bag-like weir 20 is inflated. In this arrangement work, the above-described guide member may be used as necessary.

  Next, in the bag-like weir expansion step, as shown in FIGS. 7 and 8, the bag-like weir 20 is covered by introducing the fluid into the bag-like weir 20 disposed in the cavity 13 and expanding it. The top and bottom ends 13a and 13b are partitioned by being brought into close contact with the engineered concrete 12 and the natural ground 10.

  In the filler filling step, as shown in FIGS. 1 and 9, the filler 14 is provided in the filling hole 23 in the top end portion 13a partitioned from the side portion 13b (FIG. 1). A predetermined amount of filler 14 is filled and filled and cured.

  At this time, as shown in FIG. 3, the tunnel 11 has an upward slope from the downstream side toward the upstream side, so the flow direction of the filler 14 after filling (flows downstream due to gravity) is taken into consideration. Then, as shown by the white arrow in FIG. 9, the filling material 14 is filled from the first filling hole (shown by a broken line) 23 from the downstream side of the tunnel 11 toward the upstream side, While watching, it is preferable to sequentially fill the filler 14 from the next filling hole 23 (shown by a solid line).

  Note that the tunnel 11 has an upward slope from the downstream side toward the upstream side, and the pumping of the filler 14 can be stopped in a timely manner in consideration of the flow direction of the filler 14 after filling. There is little possibility of injecting the material 14. Therefore, the bag-like weir 20 arranged in the direction crossing the tunnel 11 at the upstream end portion of the tunnel 11 is not necessarily provided.

  In this way, only the top end portion 13a can be limitedly filled with the filler 14, and the ground 14 and the lining concrete 12 can be integrated by hardening the filler 14.

  Here, for convenience of explanation, the example in which the filler 14 is filled from the two filling holes 23 from the downstream side to the upstream side of the tunnel 11 has been described. However, the range to be filled has further expanded to the upstream side. If there is, the necessary number of holes for the bag-like weir 22 and the filling hole 23 are cut in the direction, and the above series of steps may be repeated sequentially.

  In the present embodiment, the bag-like weir 20 is contracted after the filling material filling step and is retracted and reused. Therefore, as shown in FIGS. 10 and 11, the fluid is discharged from the bag-like weir 20 and contracted. After carrying out the bag-like weir shrinking step, a bag-like weir collecting step is carried out in which the shrunken bag-like weir 20 is taken out from the bag-like weir hole 22 and collected.

  When the bag-like weir 20 is not reused and is left buried in the cavity 13, the bag-like weir collecting step is omitted.

  Next, a hole closing step for closing the bag-like weir hole 22 and the filling hole 23 is performed as necessary. By closing these bag-like weir holes 22 and filling holes 23, it is possible to suppress the generation of new cracks from the portions, to suppress the outflow of spring water and earth and sand, and to enhance the appearance of the inner wall of the tunnel 11. It can also be arranged.

  As described above, according to the filling means and the filling method for filling the cavity according to this embodiment, the filling material 14 can be filled in the top end portion 13a of the cavity 13 in a limited and reliable manner. Therefore, since the usage-amount of the filler 14 can be reduced, a construction cost can be reduced and a construction period can be shortened. Moreover, since the bag-like weir 20 can be used repeatedly, it is economical and the construction cost can be further reduced.

  In addition, in the said Example, although demonstrated as what reuses the bag-like dam 20, it is not limited to this, You may embed to the cavity 13 without reusing the bag-like dam 20.

  In this case, the fluid introduced into the bag-like weir 20 may be air or water, but the filler 14 may be used. By using the filler 14, the occupied volume portion of the bag-like weir 20 in the cavity 13 can be made the filling range, so that the natural ground 10 and the lining concrete 12 can be further integrated.

  Further, when the bag-like dam 20 is left buried in the cavity 13, the bag-like dam 20 is made of a biodegradable resin having the predetermined deformation characteristics, strength, and the like from the viewpoint of environmental conservation and the like. Preferably it is formed.

  In other words, the biodegradable resin as used herein means that, during use, it can be used in the same way as a normal resin, and after use, it becomes a low molecular weight compound due to the involvement of microorganisms or moisture in nature. “Resin that decomposes into carbon dioxide”.

  In addition, although the said Example demonstrated and demonstrated the tunnel 11 which is often constructed | assembled in horizontal directions, such as a railroad, a road, and a water conduit, it is not limited to this. For example, the tunnel here means a hole provided in the basement, and includes one having only one entrance such as a vertical hole, not a through hole, and the shape of the hole is not particularly questioned. Further, the filling location is not limited to the cavity at the top end portion, but can be applied to the side wall portion and the invert portion, and the same effect can be expected.

  Here, the effect by this invention is added supplementarily. For example, when there is groundwater for drinking water around the tunnel 11 to which the present invention is to be applied, groundwater contamination must be avoided. According to the present invention, since the bag-like weir 20 stops the outflow of the filler 14, the filler 14 which has not yet solidified flows out into the groundwater, and its components are eluted into the groundwater to contaminate the groundwater. There is no such thing as.

  Further, even when groundwater is flowing in the side portion of the filling portion, the groundwater and the filler 14 are edged without being directly touched by the bag-like weir 20, so that the groundwater is not contaminated. As described above, the present invention can prevent water pollution and is effective in maintaining the environment.

  As described above, the filling means and the filling method of the filler according to the present invention are useful for filling the cavity formed between the backside of the existing tunnel lining concrete and the ground. Especially, it is suitable for the case where the filler is limitedly filled into the cavity at the top end.

It is sectional drawing which shows the tunnel by which the filling material was filled in the cavity of the top end part using the bag-like dam concerning the Example of this invention. It is sectional drawing which shows the tunnel which provided the hole for bag-like dams, and the hole for filling. It is sectional drawing which shows the state which cut | disconnected the tunnel shown in FIG. 2 by AA. It is the top view which looked at the hole for bag-like dams, and the hole for filling from the cavity of the top end part. It is sectional drawing which shows the tunnel which introduced the shrunk bag-like dam into the cavity from the bag-like dam hole. It is the top view which looked at the lining concrete shown in FIG. 5 from the cavity of the top edge part. It is sectional drawing which shows the cavity divided by the expanded bag-like dam. FIG. 8 is a plan view of the cavity shown in FIG. 7. It is a top view of the cavity shown in FIG. It is sectional drawing which shows the tunnel which shrunk the bag-like weir after filling with a filler. It is a top view which shows the filling material limitedly filled in the cavity of the top end part. It is sectional drawing which shows the cavity formed in the lining back surface of the conventional tunnel. It is sectional drawing which shows the state which filled the cavity with the filler.

Explanation of symbols

10 Ground mountain 11 Tunnel 12 Clay concrete (tunnel construction material)
13 Cavity 13a Top end (desired filling point)
13b Side (location other than desired filling location)
14 Filling Material 15 Injection Pipe 20 Bag-like Weir 22 Bag-like Weir Hole 23 Filling Hole

Claims (2)

A filling means for filling a filler only in a desired filling portion among cavities formed between a tunnel construction member and its surrounding ground,
The filling means includes
It is formed in a bag shape and expands when a fluid is introduced into the bag, and is contracted when the fluid is discharged, and after the fluid is disposed in the contracted state, the fluid Is introduced into the inside and expands to form a bag-like dam that partitions the desired filling location and other locations;
A bag-like weir hole provided in the tunnel construction member so as to communicate with the cavity, and introduced into a predetermined position in the cavity in a contracted state of the bag-like weir;
Provided in the tunnel construction member so as to communicate with the desired filling portion, and a filling hole for filling the filling desired portion with the filler;
It is those with,
The bag-like weir is formed by an elastic sheet provided with a reinforcing material, and is formed so as to be reusable by being discharged from the bag-like weir hole in a contracted state after the fluid is discharged after being inflated and used. A filling means for filling a cavity with a filler.   A filling method for filling a filler only in a desired filling portion among cavities formed between a tunnel construction member and its surrounding ground,
  It is formed by an elastic sheet provided with a reinforcing material, and expands when a fluid is introduced into the interior, while the fluid is discharged after being inflated and used by being taken out from the bag-like weir hole in a contracted state. A bag-like weir hole drilling step for opening a bag-like weir hole in the tunnel construction member for introducing a bag-like weir formed in a predetermined position in the cavity;
  A filling hole drilling step for opening a filling hole for filling the filling desired portion in the tunnel construction member;
  A bag-like weir introduction and disposition step of introducing the bag-like weir into the cavity from the bag-like weir hole in a contracted state and disposing it at a predetermined position;
  A bag-like weir expansion step that partitions the desired filling point and other points by introducing the fluid into the bag-like weir disposed in the cavity and inflating it;
  A filling material filling step of filling the filling material into the filling desired portion from the filling hole;
  A bag-like weir shrinking step for discharging the fluid and shrinking the bag-like weir;
  A bag-like weir collecting step of taking out and collecting the shrunk bag-like weir from the bag-like weir hole;
  A method of filling a cavity with a filler characterized by comprising:

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