JP2016003551A - Packing for excavation machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing for an excavation machine which uses a rubber belt material for a bag body structure particularly, pressure-fills air, water, a filler or the like into the bag body structure to form a doughnut shape in an installation site, improves adhesion to cement or a propulsion pipe, and increases rigidity.SOLUTION: A packing for an excavation machine is three-dimensionally fixed to the inside of an entrance which is formed at a tunnel wall. The packing is made to tightly adhere to a shield machine, or cement, or an external periphery of a propulsion pipe which is continuously arranged at the shield machine, and constituted so as to hold a cut-off function. A joining part abutment material is joined to an abutment part of two pieces of rubber sheet materials, a bag-shaped tube packing is attached to a valve, a pressure-sending pipe is connected to the valve, and the tube packing is expanded by pressure-sending air, water, or a filler from the pressure-sending pipe. A tube-packing outside constituting part and a tube-packing inside constituting part are formed of rubber sheet materials which are different in physical properties.

Description

  The present invention relates to a large-diameter packing for a shield tunnel, and in particular, a rubber belt material is formed into a bag structure, and air or water is sealed in the inside thereof to form a donut shape to improve adhesion to a shield or a segment and increase strength. The present invention relates to a packing for excavating machines that can be adapted for large diameter and high water pressure.

  The digging machine packing described above has a wellhead packing structure for safely constructing the shield starting and reaching work under conditions of a large depth and high water pressure.

  In recent years, shielding work under deep and high water pressure conditions due to the congestion of underground structures has increased, but in excavation by excavating machines, various types of entrances that prevent outflow of excavated mud and groundwater from openings The idea is being developed.

  In addition, in order to start excavation machines from shafts and shield tunnels, it is necessary to completely prevent mud and groundwater from flowing out of the wellhead. Generally, an entrance is installed at the wellhead forming part to form a water stop mechanism. In addition, a ground improvement portion is formed by injecting a chemical solution in the surrounding ground surrounding the wellhead forming portion.

  JP 2001-248385 A   JP 2002-89173 A   Japanese Patent Application Laid-Open No. 10-15482

  Japanese Patent Application Laid-Open No. 2001-248385 described above discloses an entrance packing having a structure in which a ring-shaped elastic member disposed on a peripheral portion of an opening is sandwiched between a receiving plate having an opening corresponding to a propulsion machine and a presser plate. Yes.

  Moreover, in the above-mentioned JP-A-2002-89173, it has a water stop device composed of a hollow tube made of rubber entrance packing and a rubber tube, and can be expanded by injecting fluid such as compressed air or water. As described above, there is disclosed a water stop method capable of being pressed against the outer peripheral surface of a shield machine.

  Further, in the above-mentioned Japanese Patent Laid-Open No. 10-159482, when a shield machine having a stepped portion on the outer peripheral surface provided with a first entrance and a second entrance capable of bulging / retreating inside the packing case However, a tunnel entrance structure that can prevent the outflow of underground water to a shaft and a shield method using the same are disclosed.

  However, in these cited patents, the outer peripheral edge of the excavation machine is sequentially propelled against the curved surface of the shaft inner wall, and as a result, the sealing tube that is pressed against the outer periphery of the excavation machine under a deep and high water pressure condition is adhered. The property and strength were insufficient.

  Moreover, since the temporary entrance side wall of the wellhead is removed after the excavation work is completed, water stoppage between the shaft side wall and the segment or the fume pipe is incomplete, which causes water leakage and the shaft side wall weakening.

  In the present invention, the adhesion and strength of the sealing tube pressed against the outer periphery of the shield machine under a deep depth and high water pressure condition are improved, and the problems are solved by the following means.

Inside the entrance formed in the pit wall, it is fixed in three dimensions, closely attached to the outer periphery of the segment connected to the shield machine or shield machine, and is configured to maintain the water stop function, Attaching the joining part pad to the contact part of the two rubber sheet materials, attaching the valve to the tube packing formed in the bag shape, connecting a pressure feeding pipe to the valve, air from the pressure feeding pipe, The tube packing is expanded by pumping water or a filler, and the tube packing outer component and the tube packing inner component are composed of rubber sheet materials having different physical properties. It is characterized in that the flexibility of the inner part of the packing is greater than the flexibility of the outer part of the tube packing. The tube packing expanded and fixed in a three-dimensional shape on the side is formed into one donut shape or a double donut shape, and a hinged flap is provided along the tube packing. The rubber sheet is constructed so that it can be reinforced, and both edges of the rubber sheet are fixed to the inside of the entrance formed in the pit wall, and air, water or filling is carried out inside the rubber sheet by a pressure feed pipe. According to the structure of the entrance formed in the well wall, the outer periphery of the segment connected to the shield machine or shield machine is characterized in that the rubber sheet is expanded by forcibly pumping the agent to form a tube packing. The tube packing to be crimped to is fixed in combination with 3D or 2D so that the water stop function is maintained. A large-diameter gasket for shielding tunnel, characterized in that made the as I do today.

  The present invention relates to a large-diameter packing for a shield tunnel, and in particular, a rubber sheet material is made into a bag structure, and air, water, or a filler is sealed in the inside thereof to form a donut shape to improve adhesion to a shield machine or a segment. This is a large-diameter packing for shield tunnels that can be applied to large-diameters with increased strength and high water pressure.

  The large-diameter packing for a shield tunnel described above provides a well-hole packing structure for safely constructing a shield starting and reaching work under conditions of a large depth and high water pressure.

  It is a large-diameter packing installation perspective view for a shield tunnel.   It is a cross-sectional view of a large-diameter packing for a shield tunnel.   It is a fragmentary perspective view of tube packing.   It is a valve attachment figure of tube packing.   It is a top view in which a shield machine reaches a cylindrical shaft wall.   It is a shaft wall attachment sectional view of tube packing.

  As shown in FIG. 1, the present invention is fixed in a three-dimensional shape inside the entrance formed in the pit wall 1 and is in close contact with the outer periphery of the shield machine 2 or the segment 3 connected to the shield machine 2. This is a large-diameter packing for a shield tunnel configured to maintain the function.

  As shown in FIG. 3, the joining portion pad 53 is adhered to the contact portion of the two rubber sheet members and joined together, and the valve 13 is attached to the tube packing 5 formed in a bag shape as shown in FIG. 4. The pipes 6 to 7 are connected to the valve 13, and air, water or filler is pumped from the pressure pipes 6 to 7 to expand the tube packing 5.

  The tube packing 5 is formed by configuring the tube packing outer side configuration part 51 and the tube packing inner side configuration part 52 with rubber sheet materials having different physical properties.

  The tube packing 5 is formed such that the flexibility of the tube packing inner component 52 is greater than the flexibility of the tube packing outer component 51.

  FIG. 5 shows a plan view in which the cylindrical shield machine 2 arrives with respect to the flat circular shaft, but the tubular packing 18 is necessarily fixed in a three-dimensional state.

As shown in FIG. 6, the tubular packing 18 in the three-dimensional state is fixed to the pit wall 15 with bolts 17 and 19 and forcedly pumped air, water or filler from the pumping pipe 16. A tubular packing 18 is formed and is in close contact with the shield machine 2.

  Moreover, as shown in FIG. 2, the tube packing 4 which is fixed and expanded in a three-dimensional manner inside the entrance formed in the pit wall 1 is formed as one donut-shaped or double donut-shaped tube packings 4 and 5. Composed.

  Air or a filler is forcedly fed from the valve 13 as shown in FIG. 4 to the tube packings 4 and 5 to be brought into close contact with the shield machine 2 to the segment 3.

  Further, hinged flaps 9 and 10 are provided along the tube packings 4 and 5 so that the tube packings 4 and 5 can be reinforced.

  As shown in FIG. 6, both edges of the tubular packing 18 are fixed to the inside of the entrance 15 of the pit wall 15 with bolts 17 and 19, and air or a filler is forced inside the tubular packing 18 by a pressure feed pipe. The tube packing 18 is formed by being pumped and expanded.

  FIG. 5 shows a state in which the excavation machine 2 arrives at the circular shaft, but when the excavation machine starts from the inside of the shaft, the horizontal both ends of the outer shape of the excavation machine are used for the start. Even in the case where the entire peripheral portion is sequentially pushed after being brought into contact with the inside of the circular recess, the sealing tubes 4 and 5 are similarly brought into close contact with the outer periphery of the excavating machine 2 or the segment 3 so that a water stop effect is produced. Configured.

  Further, depending on the structure of the entrance formed in the pit wall, the tube packing to be crimped to the outer periphery of the segment or the propulsion pipe connected to the excavation or the excavation machine is fixed in combination in a three-dimensional or two-dimensional form, It is configured to retain the water stop function.

DESCRIPTION OF SYMBOLS 1 Well wall 2 Shield machine 3 Segment 4 Tube packing 5 Tube packing 51 Tube packing outer structure part 52 Tube packing inner structure part 53 Joint part contact material 6 Pressure feed pipe 7 Pressure feed pipe 8 Pressure feed pipe 9 Flap 10 Flap 11 Steel plate 12 Bolt 13 Valve 14 entrance 15 pit wall 16 pumping pipe 17 bolt 18 tube packing 19 bolt

Claims (8)

  Inside the entrance formed in the pit wall, it is fixed in a three-dimensional shape, closely attached to the outer periphery of the shield machine or the segment connected to the shield machine, and configured to maintain a water stop function Packing for digging machines.   Attaching the joining part pad to the contact part of the two rubber sheet materials, attaching the valve to the tube packing formed in the bag shape, connecting a pressure feeding pipe to the valve, air from the pressure feeding pipe, The packing for an excavation machine according to claim 1, wherein the tube packing is expanded by pumping water or a filler.   The packing for an excavation machine according to claim 1, wherein the tube packing outer side component and the tube packing inner side component are formed of rubber sheet materials having different physical properties.   The packing for an excavation machine according to claim 1, wherein the flexibility of the tube packing inner component is greater than the flexibility of the tube packing outer component.   2. The packing for an excavation machine according to claim 1, wherein the tube packing which is fixed and expanded in a three-dimensional manner inside the entrance formed in the well wall is configured in one donut shape or two donut shapes. .   The packing for an excavation machine according to claim 1, wherein a flap with a hinge is provided along the tube packing so that the tube packing can be reinforced.   Both edges of the rubber sheet are fixed to the inside of the entrance formed on the pit wall with bolts, and the rubber sheet is expanded by forcibly feeding air, water or a filler inside the rubber sheet with a pressure feed pipe. 2. The packing for a digging machine according to claim 1, wherein tube packing is formed.   Depending on the structure of the entrance formed in the pit wall, the tube packing that is crimped to the outer periphery of the shield machine or the segment connected to the shield machine is fixed in combination in a three-dimensional or two-dimensional manner, and has a water stop function. A packing for an excavation machine, characterized by being configured to hold.

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