JP2010013913A - Water cutoff and protection device of tunnel penetrating through active fault or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water cutoff and protection device of a tunnel penetrating through an active fault or the like, for decreasing damages caused by a change in the fault when an earthquake, occurs in an active fault, an active fault zone, a geological change zone, an entrance, a widened sectional zone of a tunnel, a curved tunnel concrete laid section, a tunnel branching section, a tunnel crossing section, etc. <P>SOLUTION: In a mortar spraying method spraying mortar to the inner side 31 of an excavated tunnel or in a lagging method a liquid elastic seal material 51 is injected into portions penetrating through an active fault or the like, one or a plurality of non-woven fabric tubes 5 filled with an elastic sealing material are placed in contact with the site, or one or a plurality of tabular base isolating material sheets are placed in contact with the site. Then, a sheet material 7 is fixed, and further concrete 32 is placed. Further, a liquid elastic seal material 61 is additionally injected into a rubber chip plate shaped section between the natural ground and the non-woven fabric tubes after a secondary covering is placed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is for reducing damage to a tunnel structure at the time of an earthquake occurrence in an active fault, a geological change part, a wellhead part, a tunnel cross-section widened part, a curved tunnel concrete placing part, a tunnel branch part, a tunnel crossing part, etc. The present invention relates to a water stop and protection device for a tunnel penetrating an active fault and the like, and a water stop and protection method for a tunnel.

  Conventionally, a tunnel structure or the like following a fault displacement has been proposed. For example, JP-A-4-327673, JP-A-2006-233626, Japanese Patent No. 3330341, etc., all of which are tunnels passing through a fault. Concerning structure.

  JP-A-4-3276733   JP 2006-233626 A   Japanese Patent No. 3330341

  Japanese Patent Application Laid-Open No. 4-327893 of Patent Document 1 discloses a tunnel structure that follows a fault displacement. This is a double tube tunnel that crosses a fault, and is substantially between an outer cylindrical body and an inner cylindrical body. Since it is a shape formed by interposing a large number of A-type supports, construction at the work site is difficult.

  Japanese Patent Application Laid-Open No. 2006-233626 of Patent Document 2 is provided with legs between the concrete sprayed on the tunnel widening part and the inner ring having the expansion joint. It is difficult.

  Patent No. 3330341 of Patent Document 3 is a rubber tube made of a flexible member arranged on the inside of a steel segment, the cross section is a perfect circle, and cannot be applied to a large tunnel, The structure is suitable for pressure sewerage.

  The present invention avoids the problems of Patent Documents 1 to 3 described above, and an earthquake occurs in an active fault, a geologic change part, a wellhead part, a tunnel cross section widened part, a curved tunnel concrete placing part, a tunnel branch part, a tunnel crossing part, etc. The present invention relates to a water stop and protection device for a tunnel penetrating an active fault or the like for reducing damage to the tunnel structure at the time.

  The water stop and protection device for a tunnel that penetrates an active fault or the like according to the present invention includes, in Example 1, an active fault, a geologic change part, a wellhead part, a tunnel cross-section widened part, a curved tunnel concrete placing part, a tunnel branch part, a tunnel In a water stop and protection device for a tunnel that penetrates an active fault, etc., to reduce damage caused by fault change at the time of an earthquake at an intersection, etc., spray mortar on the inside of the excavated tunnel, and pass through the active fault, etc. The curable liquid elastic sealing material was mixed with 100 parts by weight of an isocyanate group-terminated urethane prepolymer, 50 to 200 parts by weight of an asphalt emulsion, and 20 to 40 parts by weight of cement. It is made of a body and cured to become an elastic sealing material.

  In Example 2, in order to reduce the damage to the tunnel structure at the time of earthquake occurrence in the active fault, geological change part, wellhead part, tunnel cross section widened part, curved tunnel concrete placing part, tunnel branch part, tunnel intersection part, etc. In a water stop and protection device for a tunnel that penetrates an active fault, etc., a mortar is sprayed on the inside of the excavated tunnel, and one non-woven tube in which a curable liquid elastic sealing material is injected at a location that penetrates the active fault, etc. The curable liquid elastic sealing material injected into a non-woven tube is composed of 100 parts by weight of an isocyanate group-terminated urethane prepolymer, 50 asphalt emulsion 50 A nonwoven fabric comprising a mixture of up to 200 parts by weight and 20 to 40 parts by weight of cement and injected with a cured elastic sealing material Characterized in that the MenShinzai consisting cube.

  In Example 3, active faults, geological changes, near the pit, tunnel cross section widening, curved tunnel concrete placement, tunnel bifurcation, tunnel intersection, etc. In a water stop and protection device for tunnels that penetrate faults, etc., a mortar is sprayed inside the excavated tunnel, and a rubber elastic plate material with rubber chips gathered and fixed at a location that penetrates active faults, etc., or commercially available One or a plurality of equivalent elastic sealing materials are in contact with each other, then the sheet material is fixed, and further concrete is cast, and the binder of the plate-like elastic sealing material is an isocyanate group-terminated urethane. It consists of a mixture of 100 parts by weight of prepolymer, 50 to 200 parts by weight of asphalt emulsion and 20 to 40 parts by weight of cement. Providing waterproofing and protective device for a tunnel that penetrates the active faults like, characterized in that the member 52.

  In Example 4, as shown in FIG. 6, a curable liquid elastic sealing material is injected between the hanging sheet pile and the sheet material in a state where the hanging sheet pile is juxtaposed to the supporting work, and the secondary lining is provided inside the sheet material. The present invention provides a water stop and protection device for a tunnel penetrating an active fault or the like, characterized by placing concrete.

  According to the water stop and protection device for a tunnel penetrating an active fault or the like of the present invention, in any case of Example 1 to Example 3, it is possible to appropriately construct the fault contact part at the work site. Yes, after construction, the damage to the tunnel wall due to the displacement of fault ground motion at the time of earthquake occurrence can be reduced.

Hereinafter, the water stop and protection device for a tunnel penetrating the active fault of the present invention will be specifically described with reference to the drawings.
In the drawings, FIG. 1 is a sectional view in which a tunnel is formed in a natural ground having different geological features. FIG. 2 is a partially enlarged view of FIG. FIG. 3 is a partially enlarged cross-sectional view of the upper portion of the well wall taken along line AA in FIG. FIG. 4 is a partially enlarged cross-sectional view showing another embodiment of the upper portion of the well wall taken along line AA in FIG. FIG. 5 is a partially enlarged cross-sectional view showing another embodiment of the upper portion of the well wall taken along line AA in FIG. FIG. 6 is a partially enlarged cross-sectional view showing another embodiment of the upper portion of the well wall taken along line AA in FIG.

  As shown in claims 1 and 2, in the first embodiment, in the water stop and protection device of the tunnel 3 penetrating the active fault 2 and the like, as shown in FIG. The solidified mortar 6 is attached, and a lock bolt 4 is driven in if necessary, and a curable liquid elastic sealing material 51 is injected into a portion penetrating the active fault 2 and the like. Is made of a mixture of 100 parts by weight of an isocyanate group-terminated urethane prepolymer, 50 to 200 parts by weight of an asphalt emulsion and 20 to 40 parts by weight of cement, and becomes a seismic isolation material 52.

  As shown in claims 3 to 4, in the second embodiment, in the water stop and protection device for the tunnel 3 penetrating the active fault 2 and the like, as shown in FIG. One or a plurality of non-woven tubes 5 filled with a curable liquid elastic sealing material 51 are brought into contact with the solidified mortar 6 through the active fault 2 and the like, then the sheet material 7 is fixed, and concrete 32 is placed. The curable liquid elastic sealing material injected into the non-woven tube 5 is a mixture of 100 parts by weight of an isocyanate group-terminated urethane prepolymer, 50 to 200 parts by weight of an asphalt emulsion, and 20 to 40 parts by weight of cement. It becomes the seismic isolator hardened | cured in the nonwoven fabric tube 5, It is characterized by the above-mentioned.

  As shown in claims 5 to 6, in the third embodiment, in the water stop and protection device for the tunnel 3 penetrating the active fault 2 and the like, as shown in FIG. One or more plate-shaped seismic isolation materials 52 each having a rubber chip assembled and fixed with a binder are brought into contact with the solidified mortar 6 and through the active fault 2 and the like, then the sheet material 7 is fixed, and the concrete 32 is further fixed. The binder for forming the plate-like elastic sealing material is composed of a mixture of 100 parts by weight of an isocyanate group-terminated urethane prepolymer, 50 to 200 parts by weight of an asphalt emulsion, and 20 to 40 parts by weight of cement. The present invention provides a water stop and protection device for a tunnel penetrating an active fault characterized by being hardened to become a seismic isolation material 52.

  Moreover, in Example 1 shown in Claims 1 to 2 and Example 4 shown in Claim 7, when the curable elastic sealing material 51 is injected, the asphalt emulsion is added to 100 parts by weight of the isocyanate group-terminated urethane prepolymer. By adjusting 50 to 200 parts by weight and 20 to 40 parts by weight of cement as appropriate, adjustment of the viscosity, pot life, and elastic hardening at the time of pouring can be adjusted in advance according to the situation at the work site. Is good.

  Further, as shown in claim 7, in the fourth embodiment, the curable liquid elastic sealing material 51 is injected between the ground pile 1 and the hanging sheet pile 9 in a state where the hanging sheet pile 9 is arranged in parallel with the support work 8. The present invention provides a waterproof and protective device for a tunnel that penetrates a characteristic active fault or the like.

  In addition, in FIG. 6 of Example 4, the method of hanging the sheet pile 9 is shown, and the hanging sheet pile 9 is arranged in parallel with the support work 8.

  It is sectional drawing which formed the tunnel in the natural ground which consists of different geology.   It is the elements on larger scale of FIG.   FIG. 3 is a partial enlarged cross-sectional view of an upper portion of a well wall taken along line AA in FIG. 2.   It is a partial expanded sectional view which shows the other Example of the pit wall upper part in the AA of FIG.   It is a partial expanded sectional view which shows the other Example of the pit wall upper part in the AA of FIG.   It is a partial expanded sectional view which shows the other Example of the pit wall upper part in the AA of FIG.

Explanation of symbols

1 Ground 2 Active fault 21 Active fault zone 3 Tunnel
31 Inside tunnel 32 Casting concrete 4 Anchor 5 Non-woven tube 51 Hardened liquid elastic sealing material 52 Seismic isolation material 6 Solidified mortar 61 Hardened liquid elastic sealing material 7 Sheet 8 Supporting work 9 Hanging sheet pile 10 Arrow turning 11 Return packing

Claims (8)

  Active faults to reduce damage to the tunnel structure at the time of earthquake occurrence at active faults, geological changes, wellheads, tunnel cross-section widened parts, curved tunnel concrete placing parts, tunnel branching parts, tunnel intersections, etc. In the water stopping and protection device of the tunnel that penetrates, in the state where mortar is sprayed inside the excavated tunnel or the hanging sheet pile is juxtaposed to the supporting work, a curable liquid elastic sealing material is placed at a location that penetrates the active fault etc. A water stop and protection device for a tunnel penetrating an active fault characterized by being injected.   The curable liquid elastic sealing material is obtained by curing a mixture of 100 parts by weight of an isocyanate group-terminated urethane prepolymer, 50 to 200 parts by weight of an asphalt emulsion and 20 to 40 parts by weight of cement to form a seismic isolation material. A water stop and protection device for a tunnel passing through the active fault described in 1.   Active faults to reduce damage to the tunnel structure at the time of earthquake occurrence at active faults, geological changes, wellheads, tunnel cross-section widened parts, curved tunnel concrete placing parts, tunnel branching parts, tunnel intersections, etc. In the water stop and protection device of the tunnel that penetrates, mortar is sprayed inside the excavated tunnel, one or more nonwoven fabric tubes infused with a curable liquid elastic sealing material are brought into contact with the part that penetrates the active fault, etc. A waterproof and protective device for a tunnel penetrating an active fault or the like, characterized by fixing a sheet material and further placing a secondary lining concrete.   The curable liquid elastic sealing material to be injected into the nonwoven fabric tube is composed of a mixture of 100 parts by weight of an isocyanate group-terminated urethane prepolymer, 50 to 200 parts by weight of an asphalt emulsion and 20 to 40 parts by weight of cement, and is cured and seismically isolated. The water stop and protection device for a tunnel penetrating an active fault or the like according to claim 3, wherein the device is a material.   Active faults to reduce damage to the tunnel structure at the time of earthquake occurrence at active faults, geological changes, wellheads, tunnel cross-section widened parts, curved tunnel concrete placing parts, tunnel branching parts, tunnel intersections, etc. One or more plate-shaped seismic isolation materials in which rubber chips are gathered and fixed with a binder at locations where the mortar is sprayed inside the excavated tunnel and the active faults are penetrated in the water stopping and protection device of the tunnel that penetrates A tunnel water stop and protection device that penetrates an active fault or the like, characterized in that it abuts, then a sheet material is fixed, and then secondary lining concrete is placed.   The binder for the plate-shaped seismic isolation material consists of a mixture of 100 parts by weight of an isocyanate group-terminated urethane prepolymer, 50 to 200 parts by weight of asphalt emulsion and 20 to 40 parts by weight of cement, and is cured to form a seismic isolation material. A water stop and protection device for a tunnel penetrating an active fault or the like according to claim 5.   A waterproofing and protecting device for a tunnel penetrating an active fault or the like, characterized by injecting a curable liquid elastic sealing material between the ground and the hanging sheet pile in a state where the hanging sheet pile is juxtaposed to the support work.   Active faults to reduce damage to the tunnel structure at the time of earthquake occurrence at active faults, geological changes, wellheads, tunnel cross-section widened parts, curved tunnel concrete placing parts, tunnel branching parts, tunnel intersections, etc. In the water stopping and protection device of the tunnel that penetrates, in the state where mortar is sprayed inside the excavated tunnel or the hanging sheet pile is juxtaposed to the supporting work, a curable liquid elastic sealing material is placed at a location that penetrates the active fault etc. A method for stopping and protecting a tunnel penetrating an active fault characterized by being injected.

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