JP4467477B2 - Entrance entrance for propulsion pipe, structure of entrance for arrival, and water stop method for entrance entrance - Google Patents

Description

  The present invention is a propulsion pipe used in a propulsion method in which a propulsion unit is propelled first, and a plurality of propulsion pipes are sequentially connected from the rear of the propulsion unit and propulsion is performed to an arrival well of the propulsion pipe to construct an underground conduit. It is related with the entrance for arrival, the structure of the entrance for arrival, and the water stop construction method of the entrance.

  As a tunnel construction method, a propulsion machine is propelled in the ground using a jack for propulsion installed in the shaft on the start side of the propulsion pipe, and then propulsion equipment is propelled while sequentially connecting multiple propulsion pipes. A propulsion method for constructing a middle conduit is known.

  In this method, in addition to the construction of relatively short sections such as tracks and road crossing roads such as underground sidewalks and waterworks and sewers, multiple propulsion pipes are installed as intermediate anchors between the start side and the arrival side shafts. It is also applied to a so-called pipe roof construction method that spans and excavates the inside to widen the middle part (see, for example, Patent Documents 1, 2, and 3).

  In this construction method, the propulsion device propelled to the shaft on the arrival side cuts the earth retaining wall of the arrival side shaft to form the arrival shaft, enters the arrival shaft from the arrival shaft, and then the propulsion pipe reaches the arrival shaft The propulsion method is completed by entering the shaft from the bottom.

  By the way, the arrival entrance formed in the retaining wall is generally provided with an arrival entrance so that earth and sand and groundwater do not blow into the shaft due to high pressure from between the arrival well and the propulsion unit and the propulsion pipe. The entrance is collected together with the propulsion unit after the propulsion unit is accommodated in the entrance for arrival.

  Conventionally, this kind of arrival entrance can accommodate the tip of the propulsion unit 22 and the propulsion pipe 23 inside the arrival shaft 21 formed in the retaining wall 20 of the arrival side shaft as shown in FIG. An entrance pipe 24 having a caliber is attached, and a rubber plate packing 25 formed in a donut shape having a smaller diameter than the outer diameter of the propulsion unit 22 and the propulsion pipe 23 is attached to a mouth portion of the entrance pipe 24. 25 was deformed and brought into close contact with the outer peripheral surfaces of the propulsion unit 22 and the propulsion pipe 23, so that the water stop of the arrival wellhead 21 was secured.

Patent No. 3011902 JP 2004-353377 A Japanese Examined Patent Publication No. 6-102955 Japanese Patent Publication No. 7-76507 Japanese Patent Laid-Open No. 7-81486

  However, since the rubber plate packing 25 may be easily deformed by a high water pressure, it has been necessary to perform various auxiliary methods for preventing this.

  Further, when a rigid pipe having a very small curvature diameter is used as the propulsion pipe 23, it is necessary to provide a large clearance between the entrance pipe 24 and the propulsion pipe 23, and the clearance extends in the circumferential direction of the entrance pipe 24. Since it is not constant, there may be a reaching error of the propulsion unit 22 and the propulsion pipe 23, and there are cases where it is not possible to cope with it sufficiently.

  The present invention has been made to solve the above-described problems, and it is possible to reliably perform the water stop treatment at the reaching pit of the propulsion pipe, and the propulsion capable of recovering the arrival entrance and the propulsion device extremely safely. It is an object of the present invention to provide a pipe entrance entrance, a structure for the entrance entrance, and a water stop method for the entrance entrance.

  The entrance for reaching a propulsion pipe according to claim 1 is an entrance for reaching used in a propulsion method for constructing an underground conduit by propelling a plurality of propulsion pipes sequentially after the propulsion unit. And an entrance pipe formed in a diameter capable of accommodating the propulsion pipe, a filling member attached to the mouth of the entrance pipe, and an injection pipe embedded in the diameter direction of the entrance pipe in the filling member, The filling member and the injection tube are formed of a material that can be cut by the propulsion device.

  In particular, the present invention makes it possible to simplify the installation and save labor in the field construction by making the entrance for reaching the propulsion pipe into parts. A ready-made steel pipe can be used for the entrance pipe in this case, and fiber-reinforced concrete or the like can be used for the filling member. Further, a hard resin tube such as a vinyl chloride tube can be used as the injection tube. In addition, several injection pipes may be installed in the diameter direction of the entrance pipe. Further, if at least one end of the injection pipe is drawn out of the entrance pipe, the other end extends to the inside of the entrance pipe to some extent. Just be there.

  The structure of the entrance for reaching the propulsion pipe according to claim 2 is the structure of the entrance for reaching used for the propulsion method of constructing the underground pipe line by propelling the propulsion unit while sequentially propagating a plurality of propulsion pipes. An entrance pipe that is formed to have a diameter capable of accommodating the propulsion unit and the propulsion pipe, and is attached to an arrival well of the propulsion pipe; a stuffing member attached to a mouth of the entrance pipe; and the entrance pipe in the stuffing member The filling member and the injection tube are made of a material that can be cut by the propulsion device.

  The water stop method for the arrival entrance of the propulsion pipe according to claim 3 is a water stop method for the arrival entrance used in the propulsion method in which a plurality of propulsion pipes are successively connected after the propulsion unit to construct an underground pipe line. It is a construction method, an entrance pipe formed in a diameter capable of accommodating the propulsion unit and the propulsion pipe, a stuffing member attached to the mouth of the entrance pipe, and embedded in the diametric direction of the entrance pipe in the stuffing member An entrance entrance consisting of an injection pipe is attached to an arrival well of the propulsion pipe, and after the propulsion unit and the propulsion pipe cut the filling member and the injection pipe and reached the entrance pipe, the injection pipe A water-stopping injection material is injected between the entrance pipe and the propulsion pipe.

  The water stop construction method for the reaching entrance of the propulsion pipe according to claim 4 is the water stop construction method for the entrance entrance of the propulsion pipe according to claim 3, wherein the clearance between the propulsion pipe and the entrance pipe is enlarged in diameter on the outer periphery of the propulsion pipe. Alternatively, a sealing member that is closed by plastic deformation is attached in a ring shape. As the seal member in this case, a water stop tube, a tube seal, or the like can be used.

  The present invention includes an entrance pipe having a diameter capable of accommodating a propulsion device and a propulsion pipe at a reaching pit of the propulsion pipe, a filling member attached to the mouth of the entrance pipe, and an injection pipe embedded in the filling member And a propulsion unit and a propelling pipe cut off the filling member and the injection pipe to reach the entrance pipe, and then stop water between the injection pipe and the entrance pipe and the propulsion pipe. Injecting material for injection can reliably stop the water at the arrival pit, so it is possible to reliably prevent the injection of groundwater and muddy water, and safely recover the entrance pipe and propulsion unit. It has the effect.

  In addition, since the propulsion unit and the propulsion pipe are accommodated in the etlan pipe by cutting any part of the filling member attached to the entrance pipe by filling or the like, it is easy to reach the propulsion unit and the propulsion pipe. Can be absorbed.

  1 (a) and 1 (b) show the structure of the propulsion pipe arrival entrance and the arrival entrance. In the figure, an arrival well 2 is formed in the retaining wall 1 of the arrival side shaft, and the start well 2 A cylindrical entrance pipe 3 is horizontally attached to the inside. A filling member 4 is attached to the mouth portion of the entrance pipe 3, and an injection tube 5 is embedded in the filling member 4.

  The entrance pipe 3 is formed to have a diameter through which the propulsion unit 6 and the propulsion pipe 7 can be inserted.

  The filling member 4 is formed of a solidified material that can be cut by the propulsion unit 6, for example, fiber reinforced concrete, and the fiber reinforced concrete is filled in the axial direction of the entrance pipe 3 with a certain depth. The filling member 4 may be formed in a predetermined shape in advance and can be inserted into the mouth portion of the entrance pipe 3 later.

  The injection tube 5 is formed of, for example, a PVC tube that can be cut by the propulsion device 6 in the same manner as the filling member 4. The injection pipe 5 is embedded in the diameter direction of the entrance pipe 3, and one end side 5 a thereof is drawn out to the side portion of the entrance pipe 3. A plurality of injection pipes 5 may be embedded in the diameter direction of the entrance pipe 3, for example, diagonally.

  In such a configuration, for example, as illustrated in FIGS. 2A and 2B, the propulsion unit 6 reaches the entrance pipe 3 while cutting the filling member 4 and the injection pipe 5 in the filling member 4, Subsequently, when the end portion of the propulsion pipe 7 reaches the entrance pipe 3, water is stopped in the gap between the propulsion pipe 6 and the entrance pipe 3 (specifically, a hole formed in the filling member 4) from one end side 5 a of the injection pipe 5. Injecting material 8 is injected. When the injection material 8 is sufficiently solidified and the water stop treatment is surely performed, the entrance pipe 3 is recovered together with the propulsion unit 6.

  As shown in FIG. 2 (c), a water-stopping packing such as a water-stopping tube that closes the outer periphery of the propulsion pipe 7 by expanding or plastically deforming the gap between the propulsion pipe 7 and the entrance pipe 3 in the diameter direction. By attaching 9 in a ring shape, the water stop treatment can be more reliably performed.

  3 (a) and 3 (b), the shield tunnels 10 and 11 dug in parallel by the so-called pipe roof construction method are widened to construct a large-section tunnel in which the shield tunnels 10 and 11 are continuous. A construction method is shown, and a plurality of propulsion pipes 7 are laid in an arch shape between the shield tunnels 10 and 11 as a mountain retaining work, sequentially propelled from the shield tunnel 10 side to the shield tunnel 11 side.

  In this case, by using the arrival entrance of the present invention for the segment 12 at the position where the propulsion unit 6 and the propulsion pipe 7 reach the shield tunnel 11 on the arrival side, it is possible to reliably perform the water stop treatment of the arrival part. The propulsion device 6 can be recovered quickly and safely.

  The portion of the segment 12 through which the propulsion unit 6 passes is formed of a material such as fiber reinforced concrete that can be cut so that the propulsion unit 6 can cut and reach the entrance pipe 3.

  The present invention can reliably perform the water stop treatment of the arrival side entrance in the propulsion method, and can quickly and safely collect the arrival entrance of the propulsion pipe and the propulsion unit.

The structure of the entrance for arrival of a propulsion pipe and the entrance for a reach is shown, (a) is the longitudinal section, and (b) is the II line sectional view in (a). (A), (b), (c) is a longitudinal cross-sectional view which shows the water stop construction method of the entrance for the arrival of a propulsion pipe. The propulsion pipe constructed as a mountain retaining work between shield tunnels dug in parallel is shown, (a) is a longitudinal sectional view thereof, and (b) is an enlarged view of a portion B in (a). It is a longitudinal cross-sectional view which shows the prior art example of the structure of the entrance for a propulsion pipe and the entrance for arrival.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Earth retaining wall of the arrival side shaft of a propulsion pipe 2 Access port 3 Entrance pipe 4 Packing member 5 Injection pipe 6 Propulsion machine 7 Propulsion pipe 8 Injection material 9 Water stop packing 10 Shield tunnel 11 Shield tunnel 12 Segment

Claims (4)

  An entrance for use in a propulsion method in which a plurality of propulsion pipes are sequentially propelled from behind the propulsion unit to construct an underground conduit, and the entrance is formed to have a diameter that can accommodate the propulsion unit and the propulsion pipe. It is composed of a pipe, a filling member attached to the mouth of the entrance pipe, and an injection pipe embedded in the diameter direction of the entrance pipe in the filling member, and the filling member and the injection pipe can be cut by the propulsion unit The entrance for the propulsion pipe, characterized by being made of a simple material.   It is a structure of the entrance for use used in the propulsion method of constructing an underground conduit by sequentially propelling a plurality of propulsion pipes after the propulsion unit, and is formed so as to accommodate the propulsion unit and the propulsion pipe, An entrance pipe attached to the reaching port of the propulsion pipe, a filling member attached to the entrance of the entrance pipe, and an injection pipe embedded in the filling member in the diameter direction of the entrance pipe, the filling member And a structure of the entrance for reaching the propulsion pipe, wherein the injection pipe is made of a material that can be cut by the propulsion unit.   An entrance pipe that can accommodate the propulsion unit and the propulsion pipe, and is a water stop method for the entrance entrance used in the propulsion method that constructs underground pipes by propelling a plurality of propulsion pipes sequentially after the propulsion unit. And an entrance for entrance consisting of a filling member attached to the mouth of the entrance pipe and an injection pipe embedded in the diameter direction of the entrance pipe in the filling member, attached to the arrival well of the propulsion pipe, and the propulsion After the machine and the propulsion pipe cut the filling member and the injection pipe and reached the entrance pipe, the injection material for water stoppage is injected from the injection pipe between the entrance pipe and the propulsion pipe. A water stop construction method for the entrance to reach the propulsion pipe. 4. The water stop at the entrance for reaching the propulsion pipe according to claim 3, wherein a seal member that closes the propulsion pipe and the entrance pipe by expanding or plastically deforming the ring is attached to the outer periphery of the propulsion pipe in a ring shape. Construction method.

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