JPH0718971A - Construction method of conduit and entrance packing device used for it - Google Patents

Abstract

(57) [Summary] [Purpose] In the construction method of the conduit from the existing winding road,
It can be guided firmly and can be propelled in a stable state, and this guide can also correct the direction, and it can be adapted to posture control of the propulsion construction of the conduit. [Structure] The entrance packing device 70 has a ring-shaped entrance housing 75 whose swing angle can be changed, and a device for pushing out the shield excavator 1 in an existing shaft.
The tip cutter part is extruded by 100 until it comes close to the entrance packing device 70, then the lining material 30 is assembled at the rear part of the shield excavator 1 and the extruding device 100 extrudes the lining material and the shield excavator 1, After passing through the housing 75, the temporary lining portion 76 is crushed by the shield excavator 1 using this as a guide and fed out into the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a conduit from an existing winding road and an entrance packing device used therefor.

[0002]

2. Description of the Related Art To construct a shaft for connecting work as a conduit path for a toll road that is built deep underground from an existing manhole underground structure, use an excavation method or a large diameter boring machine from the road. Often constructed.

Of these, the open-cut method requires monopolizing the road surface in urban areas, and causes problems such as traffic congestion, noise, and vibration. Further, when excavating from the ground by a large-diameter boring method or the like and connecting to an existing winding road, an auxiliary method (chemical solution injection or the like) to the joint is required, and pollution problems such as groundwater contamination are likely to occur. Further, depending on the soil quality of the excavation, it is easy for the casing to bite (jamming), which may make construction difficult.

Therefore, Japanese Patent Application No. 3-72293 (Japanese Patent Laid-Open No. 4-2852).
89), there is a method of constructing a vertical shaft as shown in FIG. This is because during the construction of the primary lining for shield excavation that is performed in the deep part of the existing underground structure 110, the box excavation part is formed in advance in the shield segment top plate part, and the existing tunnel 114
In advance, the entrance seal device 164 is attached to the unboxed portion, and the vertical shaft shield excavator 120 is installed in the existing tunnel 114.

The shield excavator 120 for the vertical shaft is installed on the floor plate 154.
Installed in the vertical shaft shield excavator 120 and propelled upward by a starter device 152 composed of a plurality of propulsion jacks 156 and hold jacks 158 arranged along the inner peripheral edge of the shaft excavator 120 to crush and excavate the boxed portion. Excavate into the ground and assemble the segment 182 along the existing tunnel 114 to excavate the vertical shaft and perform upward propulsion.

In the figure, 112 is a horizontal shield excavator for constructing the existing shaft 114, 131 is a slide cutter of the shaft shield excavator 120, and 126 is a disc cutter.

[0007]

According to the method of constructing a vertical shaft shown in FIG. 6, it is not necessary to secure a work area on the ground side, and the deep underground portion is directly removed without removing the existing underground structure portion. The excellent effect of being able to dock from underground roads to underground structures is obtained.

However, the entrance seal device 164 has a seal member formed by bundling a large number of fibers made of metal, rubber or resin material into an annular shape, and this seal member is provided on the outer peripheral surface of the main body of the shaft excavator 120. This is not a guide for propulsion just by sliding. As a result, the vertical shaft shield excavator 120 and the segment 182 to be assembled behind it are liable to be bent so that the center of the entrance seal device 164 does not always coincide with the center thereof, and the sealability of the entrance seal device 164 is limited. Also causes a bias.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, to firmly guide the vehicle in the entrance housing and to propel it in a stable state, and the guide by the entrance housing can also correct the direction. It is an object of the present invention to provide a method of constructing a conduit and an entrance packing device used for the method of adapting the attitude control of the propulsion construction of the conduit.

[0010]

In order to achieve the above-mentioned object, the present invention incorporates a temporary-covered entrance packing device into the mine of the primary lining segment that constitutes the existing wrapping path in advance, and This lining material and shield excavator are extruded by an extruding device, fed out from the temporary lining portion into the ground, and thereafter, a step of adding a new lining material to the rear end of the lining material and an excavation step by the extruding device. In the method of repeatedly constructing a conduit from an existing wind tunnel, the entrance packing device is provided with a ring-shaped entrance housing having a spherical outer peripheral surface on the outer periphery of the temporary covering portion made of RC segment or resin mortar, and covering the entrance housing. Assuming that there is a ring-shaped entrance housing whose swing angle can be changed and supported by a spherical seat that is fixed to the construction material side, The shield excavator is extruded in the road by the extruding device until the tip cutter part is close to the entrance packing device, and then the lining material is assembled at the rear part of the shield excavator and the extruding device extrudes the lining material and the shield excavator, The gist is to pass through the entrance housing and use this as a guide to crush the temporary lining portion with a shield excavator and feed it into the ground.

[0011]

According to the present invention, the shield excavator and the lining material assembled to the rear of the shield excavator are extruded into the ground while being guided by the ring-shaped entrance housing of the entrance packing device. Since this entrance housing is supported by a spherical seat that is fixed to the lining material and the swing angle can be changed, it can be followed even when the direction of propulsion is corrected.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a longitudinal side view showing an embodiment of the method for constructing a conduit according to the present invention, and FIG. 2 is a perspective view of the same as above, in which there is a primary lining segment 80, and the primary lining segment 80 is located at any winding path position. In the case where the conduit path is constructed by the main shield excavator 1 in the upward direction and the inclined direction by the propulsion method, the entrance packing device 70 is installed in advance in the mine of the primary lining segment 80.

This entrance packing device 70 is shown in FIG.
~ As shown in Fig. 5, a coupling flange to be set in the box removal part
An opening frame 72 was installed via 71, and a sealing member 73, which was a rubber plate or a synthetic resin plate laminated on the opening frame 72, was accommodated in a laterally movable manner.

Further, a spherical seat 74 having a concave spherical surface on the inside is provided above the opening frame 72, and a ring-shaped entrance housing 75 having a spherical outer peripheral surface is fitted to the spherical seat 74. Entrance housing 75 in all directions about 6 °
The swing angle can be changed at any angle.

The entrance housing 75 is RC
It is arranged so as to project downward on the outer periphery of the temporary covering portion 76 made of a segment or resin mortar.

In the figure, reference numeral 100 is an extrusion apparatus of the present invention, 1 is a main shield excavator, and 30 is a lining material that is sequentially assembled and connected to the rear of the main shield excavator to form a pipe.

The extruding device 100 includes a first refilling portion 60 in which a first clamp mechanism for tightening the outer peripheral portion of the tubular body formed by connecting the lining materials 30 is provided, and a second clamp mechanism similarly. Each of the second rearranging portions 62 provided therein is provided with a propulsion jack 6
1,63 were installed and installed one after another.

In the figure, reference numeral 64 denotes a pedestal to be installed at the bottom of the primary lining segment 80 in the mine. The propulsion jacks 61 and 63 are erected on this pedestal 64, but the lower end of the propulsion jack 61 is located on this pedestal 64. The propulsion jack 63 is fixed and the lower end of the propulsion jack 63 is pin-connected to the base 64 by the clevis method. Although not shown, the first clamping mechanism of the first reassembling unit 60 and the second clamping mechanism of the second reassembling unit 62 are circular clamp rings 65 formed by combining semicircular divided pieces. And a tightening mechanism for expanding and contracting the mutual interval of the divided pieces of the clamp ring 65.

Various types of tightening mechanism such as jack type and screw type are conceivable. In this embodiment, the wedge type is adopted, and the outer periphery of the clamp ring 65 is a tapered surface with a downward constriction. The clamp ring 65 is fitted to the receiving plate 69 having a tapered inner peripheral surface with an inclination angle corresponding to this.

Although the relationship between the first refilling section 60 and the second refilling section 62 is a vertical positional relationship in this embodiment, the receiving plate 69 of the second refilling section 62 has the first refilling section. It overlaps with the receiving board 69 of the spare part 60, and the second
The propulsion jack 63 provided in the refilling portion 62 of the second extension portion 62a has its upper end extended above the receiving plate 69 of the second refilling portion 62, and the extension portion 63a
It is also possible to contact and press the receiving plate 69 of the first refilling section 60.

Further, as a lining material fastening device 40, a rotary hydraulic motor 44 and a rotary hydraulic motor 44 are provided inside the pushing device 100.
A turntable incorporating a pinion gear 43 provided at 44 and a turntable-side gear 42 meshing with the pinion gear 43.
41 is shared with the mount 64.

The turntable 41 incorporates a turntable lifting jack 45 so that the entire turntable can be lifted and lowered.

Next, usage and operation will be described.
After the entrance packing device 70 is mounted on the primary lining segment 80, it is composed of the excavator body 2 and the excavation head 3 located in front of the excavator body 2, and the excavation head 3 further has a ring-shaped outer cutter 5 that revolves. The main shield excavator 1 including the free cutters 6 and 7 arranged inside is assembled on the turntable 41, and the elevating jack 45 is extended and raised.

The outer periphery of the main shield excavator 1 is clamped by the clamp ring 65 of the first refill section 60 and the second refill section 62, and is pushed and stopped until the tip cutter section comes close to the entrance packing device 70. To do.

To extrude the main shield excavator 1 into the ground, a lining material 30 is required. The lining material 30 can be made of various materials such as steel pipes, fume pipes, cast iron pipes and ductile, but a semi-circular lining material piece 31 is used as a turntable 41.
In order to dodge the main propulsion equipment 90 of the main shield excavator 1 such as the control cable, the power cable and the hydraulic pipe, the turntable 41 is rotated by the pinion gear 43 of the rotary hydraulic motor 44 and the turntable side gear 42. Half turn, then load another piece of lining material 32, turntable
The lining material 30 joined with the lining material piece 31 on 41 and thus integrated is lifted upward by the lifting jack 45, and is rotated and screwed to the already assembled lining material 30. ,
A pipe is formed below the excavator body 2 of the main shield excavator 1.

The propelling jack 63 is contracted and the second refilling portion 62 is lowered to tighten the outer peripheral portion of the pipe body of the assembled covering material 30 with the clamp ring 65. After the operation, the propulsion jack 61 is contracted, the first refilling portion 60 is lowered, and the clamp ring 65 is similarly tightened.

In this way, the first refilling section 60 and the second refilling section 62 are refilled, and the propulsion jack 61 and the propulsion jack 63 are used to make a stroke difference correction. When the main shield excavator 1 and the tubular body made of the lining material 30 are extruded by the pushing device 100, the main shield excavator 1 penetrates the seal member 73 of the entrance packing device 70, and the inner peripheral edge of the seal member 73 is the excavator. It is brought into contact with the outer periphery of the main body 2 and is sealed.

Further, the main shield excavator 1 passes through the entrance housing 75 and is further guided and guided to crush the temporary lining portion 76 and feed it into the ground.

Then, the main shield excavator 1 pushes upward toward the ground while repeating the step of adding the lining material 30 so that continuous excavation can be performed.

At the time of such extrusion, the inclination of the receiving plate 69 can be adjusted by the propulsion jack 61 and the propulsion jack 63 to control the posture. In response to this posture control, the entrance housing 75 is moved relative to the spherical seat 74. The swing angle can be changed at an angle of about 6 °. Further, the seal member 73 corresponds to such posture control by laterally moving in the opening frame 72.

In the above-mentioned embodiment, the case of constructing the conduit line in the vertical direction has been described, but it goes without saying that it can be applied to the case of excavating the tunnel in the horizontal direction.

[0032]

As described above, the method for constructing the conduit of the present invention and the entrance packing device used for the method are as follows.
It can be firmly guided in the entrance housing and can be propelled in a stable state, and the guide by this entrance housing can also correct the direction,
It is possible to deal with the posture control of the propulsion construction of the conduit.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a method for constructing a conduit according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a method for constructing a conduit according to the present invention.

FIG. 3 is a vertical sectional front view showing an embodiment of an entrance packing device of the present invention.

FIG. 4 is a vertical sectional side view showing an embodiment of an entrance packing device of the present invention.

FIG. 5 is a partially cutaway plan view showing an embodiment of an entrance packing device of the present invention.

FIG. 6 is a perspective view showing a conventional example.

[Explanation of symbols]

1 ... Main shield excavator 2 ... Excavator main body 3 ... Excavation head 5 ... Peripheral cutter 6, 7 ... Free cutter 30 ... Lining material 31,32 ... Lining material piece 40 ... Fastening device 41 ... Turntable 42 ... Gear 43 … Pinion gear 44… Motor 45… Lifting jack 60… First reassembling section 61… Propulsion jack 62… Second reassembling section 63… Propulsion jack 63a… Extension section 64… Stand 65… Clamp ring 69… Receiving board 70 … Entrance packing device 71… Coupling flange 72… Opening frame 73… Sealing member 74… Spherical seat 75… Entrance housing 76… Temporary lining part 80… Primary lining segment 90… Main propulsion equipment 100… Extrusion device 110… Underground structure 112… Horizontal shield excavator 114… Existing shaft 120… Vertical shaft shield excavator 126… Disc cutter 131… Slide cutter 152… Starter 154… Floorboard 156… Propulsion jack 158… Hold jack 182… Segment

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kyobayashi 1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Naomichi Sawada 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Issue Japan Telegraph and Telephone Corporation (72) Inventor Minoru Nagashima 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Koji Akiyama 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo No. Japan Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. An entrance packing device that has been temporarily covered in a mine of a primary lining segment that constitutes an existing road, is previously installed, and the lining material and the shield excavator are extruded by an extruding device in the existing road, In the method of constructing a conduit from an existing gravel path, the process of unwinding from the temporary lining portion into the ground and then adding the new lining material to the rear end of the lining material and the excavation process by the extrusion device is performed. The packing device has a ring-shaped entrance housing whose swing angle can be changed, and the shield excavator is pushed out by an extruding device until the tip cutter part comes close to the entrance packing device in the existing shed,
Next, the lining material is assembled to the rear part of the shield excavator, and the lining material and the shield excavator are extruded by an extruding device, passed through the entrance housing, and the temporary lining portion is crushed by the shield excavator using this as a guide. A method of constructing a conduit from an existing winding road, which is characterized by feeding into the ground. 2. A ring-shaped entrance housing having a spherical outer peripheral surface is provided on the outer circumference of a temporary lining portion made of RC segment or resin mortar, and is supported by a spherical seat for fixing the entrance housing to the lining material side. Entrance packing device used for the characteristic conduit construction method.