JP3026303U - Packing metal fittings - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To eliminate the need for interposing a plate between a packing arranged at a starting port or a reaching port and a holding metal fitting. SOLUTION: An object (14) that can be received at a starting port (16) or a reaching port provided on a retaining wall for constructing a tunnel.
A perimeter edge (28) located at or within the opening of the starting or reaching opening to provide a seal between the earth retaining wall and the retaining wall and opposite the perimeter (18,48) of the opening of the starting or reaching opening. And object
A retainer (10) for an elastically deformable packing (12) having a hole (26) capable of receiving (14). The holding metal fitting is a single plate member facing the peripheral portion (28) of the packing and continuously extending along the opening of the starting port or the reaching port.
(32) or a plurality of split pieces (36) thereof and a plurality of swing members (34) swingably connected to the plate member or each split piece.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to an excavator that can be received at a starting or reaching opening provided in a retaining wall for constructing a tunnel, a lining that follows the excavator, and an object such as a propulsion pipe and the retaining wall. The present invention relates to a holding metal fitting for packing provided at the starting port or the reaching port in order to prevent the outflow of sediment and groundwater.

[0002]

[Prior art]

 Shield type tunnel excavators or tunnels made by digging underground with a tunnel excavator and lining them with a segment assembly, or tunnels made of concrete pipes or steel pipes that are pressed into the ground. In order to construct the excavator or the thrust pipe, the starting port for starting the excavator or the thrust pipe, and the arrival port at the arrival position of the excavator or the propulsion pipe for receiving the It will be installed on the retaining wall which is the wall of the vertical shaft.

The starting port or the reaching port is provided between the excavator that is received therein, the lining or the propulsion pipe that follows the excavator, and the earth retaining wall that defines the starting port or the reaching port. Packing for preventing the outflow of earth and sand or groundwater is arranged, and the packing is fixed to the earth retaining wall via a holding metal fitting.

The packing is made of an elastic material such as rubber, and has holes similar to the cross-sectional shapes of the starting opening and the reaching opening, and thus the excavator, the lining, or the propulsion pipe. And a peripheral portion facing the peripheral portion of the opening surface of the starting or reaching opening. When the excavator, tunnel lining or propulsion pipe is received in the packing hole, the packing hole is expanded by elastic deformation, and the portion around the packing hole is bent forward in the traveling direction. As a result, the portion of the packing around the hole is in close contact with the surface of the excavator, the tunnel lining or the propulsion pipe, thereby providing a seal between them and the retaining wall.

The pressing metal fittings of the packing are arranged behind (in the case of the starting port) and in the front (in the case of the reaching port) of the packing with respect to the traveling direction of the excavator or the propulsion pipe. A conventional pressing metal fitting for packing has a plate member and a plate-shaped swinging member having one end portion swingably connected to the plate member. It is located opposite the periphery and is secured to the earth retaining wall in the plate member using fasteners such as bolts.

The swinging member of each pressing member is swung by the propulsive force when the other end of the starting port comes into contact with the excavator or the propulsion pipe and is pressed against the packing. Prevent the packing from folding back to the opposite side and the consequent outflow of sediment and groundwater. Further, at the arrival port, the packing is bent by receiving the propulsive force of the excavator or the propulsion pipe, and is swung along with the bending of the packing. The rocking members of the plurality of holding metal fittings are connected to each other by wires in order to limit the rocking and prevent the swelling of the packing due to the soil water pressure and the accompanying spout of earth and sand or groundwater.

[0007]

[Problems to be solved by the device]

 By the way, in the prior art, the peripheral portions of the packing and the peripheral portions of the packing are set so that the peripheral portion of the packing is pressed against the peripheral portion of the starting or reaching port at all positions in the circumferential direction. A plate was placed between and. However, the placement and installation of the plates is laborious and time consuming. Also, it requires a great deal of labor and time to individually attach the plurality of pressing fittings and to remove the individual pressing fittings after the tunnel construction is completed.

An object of the present invention is to eliminate the need for interposing a plate body extending along the peripheral edge of the packing between the packing and the pressing metal fitting. Another object of the present invention is to reduce the labor and time required for attaching or detaching the pressing metal fitting of the packing.

[0009]

[Means for Solving the Problems]

 The present invention is arranged on the opening surface of the starting opening or in the inside thereof to seal between an object received in the starting opening provided in the retaining wall for building a tunnel and the retaining wall. A pressing metal fitting for elastically deformable packing having a peripheral edge portion facing the peripheral portion of the opening of the starting opening and a hole capable of receiving the object, the pressing metal fitting being opposed to the peripheral edge portion of the packing and A single plate member or a plurality of divided pieces thereof that continuously extend along the opening of the starting port, and the plate member or each divided piece swingably connected to the object in one direction by contact with the object. A plurality of rocking members that are rocked and pressed against the packing.

The pressing fitting is a member for restricting the swing of each swing member in the other direction, and is a swing limiting member provided on each swing member and capable of contacting with the plate member. Alternatively, it may include swing limiting means provided on the plate member, with which the swing members can contact. Further, the plate member has an L-shaped cross-sectional shape, one side portion of the L-shape extends relative to a peripheral portion of the starting opening, and the other side portion extends in an axial direction of the starting opening. can do.

The present invention also provides an opening surface of the reaching port for sealing between an object received in the reaching port provided in the retaining wall for constructing a tunnel and the retaining wall. A pressing metal fitting for elastically deformable packing, which is disposed inside thereof and has a peripheral edge portion facing the peripheral portion of the opening of the reaching port and a hole capable of receiving the object, the peripheral edge portion of the packing. And a single plate member or a plurality of divided pieces thereof that continuously extend along the opening of the reaching port and elastically contact with the plate member or each divided piece by swinging contact with the object. A plurality of swing members swingable in one direction via the deformable packing. The pressing fitting may further include a wire connecting the plurality of swing members to each other.

[0012]

According to the present invention, according to the present invention, with respect to the plate member of the holding metal fitting for exerting a pressing force toward the periphery of the starting opening or the peripheral portion of the arrival opening, the periphery of the packing is provided. Since the plate member is a single plate member or a plurality of divided pieces thereof that extend in the direction of the closed portion and define a closed space, the plate member causes the peripheral edge portion of the packing to be generated at all positions in the circumferential direction. It can be pressed against the entrance or the peripheral portion of the reaching opening. Therefore, it is possible to eliminate the plate body, which was indispensable to intervene between the conventional pressing metal plate and the packing when using the conventional pressing metal plate, and to install or remove the plate member. It can save labor and time required for.

Further, since a plurality of swinging members are connected to the single plate member or the divided pieces thereof of the press fitting, the single plate member or the divided pieces thereof can be attached or detached at one time. Or it can be done several times. Therefore, the labor and time required for attaching or detaching the holding metal fittings can be reduced as compared with the case of individually attaching or removing the plurality of holding metal fittings. This is particularly remarkable when the starting opening or the reaching opening has a large diameter.

The starting opening or the reaching opening may be a preformed hole made of concrete or steel, or may be an excavation hole formed in the earth retaining wall by an excavator. In the case of the starting port or the reaching port, the packing and the press fitting are attached to the predetermined opening surfaces of the starting port or the reaching port, respectively.

The rocking limiting member provided on each rocking member is brought into contact with the plate member by the member, and the rocking limiting member provided on the plate member is arranged on the member. The contact of the rocking member restricts the rocking member from rocking in the opposite direction from the rocking start position, which rocked due to contact with the excavator, lining, or propulsion pipe. This swing limitation is particularly due to eccentricity of the lining at the starting opening of the shield tunnel excavator due to abrupt displacement from the planned course, so that some swing members are prevented from contacting the lining. It is necessary to support the packing mentioned above.

When the plate member has an L-shaped cross-sectional shape, one side portion thereof faces the peripheral edge portion of the packing, and the other side portion serves as a mounting portion of the swinging member. You can

By connecting the plurality of swinging members of the holding metal fitting arranged at the arrival port with the wires, swinging of the swinging member can be limited, whereby the swelling of the packing can be prevented. Can be suppressed.

[0018]

[Embodiment of device]

 With reference to FIGS. 1 and 2, an example of a holding metal fitting according to the present invention is indicated by a reference numeral 10 and is applied to a starting port 16 described later.

The holding metal fitting 10 includes a packing (entrance packing) 12, a shield type tunnel excavator (hereinafter referred to as “shield excavator”) 14, a tunnel boring machine, a propulsion pipe such as a concrete pipe or a steel pipe, together with a packing 12. A plurality of bolt-nut assemblies 20 are attached to the peripheral portion 18 of the starting port 16 provided for guiding the object to the ground.

The starting port 16 shown in the drawing is a concrete block 22 or a steel material assembly 24 (FIG. 9) which is provided in advance on an earth retaining wall made up of a shaft wall (not shown) of a vertical shaft or an earth retaining wall of the ground above ground. ), And has a circular cross-sectional shape.

In addition to the illustrated example, the starting port is formed by excavating a shaft wall of a vertical shaft or a ground retaining wall made of concrete that can be excavated by a shield machine with the shield machine. I have something to do. In this case, the entrance packing 12 and the holding metal fitting 10 are attached to the planned surface of the earth retaining wall before the formation of the starting port, that is, the perforation of the earth retaining wall by the shield machine.

The entrance packing 12 made of an elastic material such as rubber has a circular peripheral edge and a circular hole 26 that receives the shield machine 14 and allows the shield machine 14 to pass therethrough, and is arranged coaxially with the starting port 16. The peripheral portion 28 including the peripheral edge faces the peripheral portion 18 of the starting opening 16. In the illustrated example, the peripheral edge portion 28 of the entrance packing 12 is in contact with the peripheral portion (opening surface) 28 of the opening of the starting opening 12 via the spacer 29 made of a flat ring member.

The entrance packing hole 26 has a diameter smaller than any of the outer diameters of the shield machine 14 and the lining 30 formed of the segment assembly, the concrete pipe, the steel pipe and the like following the shield machine. Therefore, when the shield machine 14 or the lining passes through the hole 26, the hole 26 is expanded and the portion around the hole is bent forward in the propelling direction of the shield machine 14, and the peripheral portion is It closely contacts the shield machine 14 or the surface of the lining. As a result, the earth retaining wall defining the starting port 16 and the shield machine 14 or the lining 30 are sealed, and movement of the earth and sand excavated by the shield machine 14 and groundwater is prevented.

The hole 26 and the starting opening 16 of the entrance packing 12 have a shape substantially similar to the cross-sectional shape of the shield machine 14 or the lining subsequent to the shield machine, respectively, and have the circular shape. In addition, there are rectangles, multiple circles in which multiple circles are connected, and so on.

The shield machine 14 may be of a so-called hand digging type or mechanical digging type. The shield machine 14 is propelled by a propulsion device such as a hydraulic jack. When the lining is composed of the segment assembly, the shield machine is propelled in the ground by causing the segment assembly solid to bear a reaction force. When the lining is made of the concrete pipe, steel pipe, etc., it is propelled in the ground together with the concrete pipe, steel pipe, etc.

The holding metal fitting 10 according to the present invention has a plate member 32 and a plurality of rocking members 34 pivotally attached to the plate member. The holding metal fitting 10 is fastened to the peripheral portion 18 of the starting opening 16 by a nut screwed to a bolt of a bolt / nut assembly 20 penetrating the plate member 32, the peripheral edge portion 28 of the entrance packing, and the spacer 29. ing. In the illustrated example, the head of the bolt is embedded in the peripheral portion 18 of the starting opening 16 in advance.

The plate member 32 faces the peripheral edge portion 28 of the entrance packing 12 and continuously extends along the opening of the starting opening 16. Therefore, the plate member 32 comes into contact with the peripheral edge portion 28 of the entrance packing 12 over the entire circumference thereof, that is, at any position in the circumferential direction. For this reason, the holding metal fitting 10 is used to hold the peripheral edge portion 28 of the entrance packing 12 over the entire circumference of the starting opening 16 without the plate body which needs to be arranged between the conventional metal fitting and the peripheral edge portion of the entrance packing. It can be pressed with almost equal force to the peripheral part of the entrance or the opening surface 18, which allows the outflow of excavated soil and groundwater from between the peripheral part 28 of the entrance packing 12 and the peripheral part (opening surface) 18 of the starting port. Can be prevented. Further, since the conventional arrangement of the plate body is unnecessary, the labor and time required for the arrangement of the plate body can be saved.

The plate member 32 is set to have a shape similar to the cross section of the starting opening. The plate member 32 shown in the figure has an annular shape as a whole, and is composed of four divided pieces 36 equally divided around the central axis thereof. However, a plurality of swing members 34 are attached to each divided piece 36. The plate member 32 may be composed of a plurality of divided pieces that are unequally divided around the central axis. The number of divisions of the plate member 32 can be other than four. Further, the plate member 32 may be a non-divided single member.

The holding metal fitting 10 having the plate member 32 including the plurality of divided pieces 36 is advantageous for transportation to the excavation site when the tunnel to be constructed has a large diameter. Further, the pressing metal fitting 10 made of a single piece can be easily installed at the starting port in the case of excavating a small-diameter tunnel.

Further, since the plurality of swinging members 34 are attached to each of the divided pieces 36 or the single plate member, the holding metal fitting 10 of the present invention includes a plurality of conventional holding metal fittings. It can be installed in a short time and with less labor as compared with the case of installing in.

Each swing member 34 is swingable around an axis in an orthogonal plane orthogonal to the axis of the starting port 16 and is capable of contacting the outer peripheral surface of the shield machine 14 or the outer peripheral surface of the lining 30. And also has a free end 38 that can contact the entrance packing 12.

The plurality of swinging members 34 shown in the drawing are each made of a rectangular plate member that extends radially toward the axis of the starting port 16 in the orthogonal plane, and the end portion on the opposite side of the free end portion 38. In 39, the shaft member 40 is passed through and fixed to each divided piece 36 of the plate member 32 via three boss members 42 and 44 arranged in series. More specifically, only the central boss member 42 is welded to the inner peripheral edge of the split piece 36, and the two boss members 44 on both sides of the boss member 42 are welded to the end 39 of the swing member 34. Therefore, each swinging member 34 can swing around the shaft member 40 together with the both boss members 44.

The free end portion 38 of the rocking member 34 has an imaginary circumferential surface having a diameter larger than the hole 26 of the entrance packing 12 and smaller than the diameters of the outer peripheral surface of the shield machine 14 and the outer peripheral surface of the lining 30. Touches. From this, when the shield machine 14 is propelled, when the lining 30 is propelled together with the shield machine 14, or when the lining 30 is assembled behind the shield machine, each rocking member 34 is The free end portion 38 comes into contact with the outer peripheral surface of the shield machine 14 or the outer surface of the lining 30, and is swung in one direction forward of the shield machine 14 in the propelling direction. The free end 38 that is swung and kept in contact with the outer peripheral surface of the machine 14 or the outer surface of the lining 30 is located at the rear side of the entrance packing 12, more specifically, the entrance packing 12 in the propelling direction. Touch the surface of.

A portion 45 between the peripheral portion 28 and the portion around the hole 26 of the entrance packing 12 that is bent forward in the propulsion direction due to the penetration of the shield machine 14 or the lining is swung. Further, it is supported by each rocking member 34, and prevents swelling backward due to the pressure of excavated soil and groundwater in the propulsion direction and accompanying bending of the hole 26 to the opposite side of the peripheral portion.

By the way, when the propulsion direction of the shield machine 14 is changed due to a sudden change in geology and this is eccentric from the planned propulsion axis, the lining is eccentric from the axis of the starting port 16 and the free end of the rocking member 34. The part 38 may not be able to contact the outer peripheral surface of the lining. In such a case, a swing limiting member 46 is provided to limit the swing of the swinging member 34 in the opposite direction (the other direction).

In the example shown in FIGS. 1 to 4, a pair of plate-shaped swing limiting members 46 extending from the free end portion 38 of the swinging member 34 toward the opposite end 39 thereof are provided. The moving member 34 is fixed to the surface on the rear side in the propulsion direction and the boss members 44 on both sides, and a part 48 of these is projected from both boss members 44 in the radial direction and is opposed to the split piece 36 of the plate member. I touch it. Therefore, the rocking member 34 does not rock from its vertically extending position (the rocking start position shown by the solid line in FIG. 2) to the opposite side (left side in FIG. 2), and when the lining is eccentric. , The part 46 of the entrance packing 12 can be supported and its expansion can be suppressed.

Referring to FIGS. 5 and 6, each of the divided pieces 36 of the plate member has an L-shaped cross-sectional shape, and one side 36 a of the L-shaped member is located in the peripheral portion 18 of the starting opening 16 or inside the starting opening. The peripheral portion 48, which will be described later, and thus the peripheral portion 28 of the entrance packing extends, and the other side portion 36b of the L-shape extends rearward in the propulsion direction with respect to the axial direction of the starting port 16. Two boss members 44 on both sides of the three boss members 42, 44 connected in series are fixed to the surface of the other piece portion 36b on the axis side of the starting port, and the central boss member 42 between both boss members 44 is formed. It is fixed to the end 39 of the rocking member 34.

In this example, the pair of swing limiting members 46 does not project from the central boss member 42 to which they are fixed, and has an end portion 46 a that can come into contact with the other piece portion 36 b of the split piece 36. . When the end portion 46a comes into contact with the other piece portion 36b, the swing member 34 is maintained parallel to the orthogonal plane orthogonal to the axis of the starting port 16 and swings to the opposite side (left side in FIG. 6). Movement is restricted.

Further, referring to FIGS. 7 and 8, in this example, two boss members 44 on both sides of the three boss members 42, 44 in series are divided pieces 36 having an L-shaped cross-sectional shape. The other end portion 36b is fixed to the surface on the axis side of the starting port, and the end portion 39 of the swinging member 34 is fixed to the central boss member 42. Therefore, the swinging member 34 can swing around the shaft member 40 together with the central boss member 42. Instead of the L-shaped cross-sectional shape, a channel shape, a box shape or the like can be selected.

In this example, a pair of rocking restricting members 46 are fixed to the surface of the other piece 36 b of the split piece 36 on the axis side of the starting port, and the rocking member 34 abuts on both restricting members 46. Then, it is maintained parallel to the orthogonal plane orthogonal to the axis of the starting port 16 and the swing to the opposite side (left side in FIG. 8) is restricted.

Referring to FIG. 9, a peripheral portion 18 at the opening surface of the starting opening 16 defined by the steel assembly 24 and a peripheral portion 48 inside the starting opening 16 are respectively shown in FIGS. The pressing metal fitting 10 similar to that shown in FIG. 7 and the pressing metal fitting 10 similar to that shown in FIGS. 7 to 8 are applied.

In this example, the entrance packing 12 applied to the peripheral portion 18 of the starting port is directly abutted on the peripheral portion 18, and is provided between the entire divided piece 36 of the plate member and the peripheral edge portion 28 of the entrance packing 12. A flat ring member 50 is arranged in the. The divided piece 36, the ring member 50, and the peripheral edge portion 28 of the entrance packing are formed of a plurality of bolts which are a bolt that penetrates these and the ring-shaped steel plate that defines the peripheral portion 18 of the starting port and a nut that is screwed into the bolt. It is fastened to the peripheral portion by a nut assembly 20.

The peripheral portion 48 of the starting opening 16 is made of a ring-shaped steel plate similar to the peripheral portion 18 and is located around the peripheral surface 52 of the starting opening. In this example, a steel material assembly that defines the starting opening so that one side portion 36a, which is a part of the plate member of the press fitting, faces the peripheral portion 48, and the other piece portion 36b defines a portion of the peripheral surface 52. It is incorporated in 24. Further, the peripheral edge portion 28 of the entrance packing 12 is arranged between the peripheral portion 48 and the one side portion 36a, and the bolt and the nut threaded through the peripheral portion 48, the peripheral edge portion 28, and the one side portion 36a penetrate through the peripheral portion 48 and the one side portion 36a. A plurality of bolt and nut assemblies 20 are pressed against the peripheral portion 48 of the starting port. According to this example, liquid tightness can be secured between the shield machine 14 or the lining and both the edge portion and the peripheral surface of the starting port 16.

Up to this point, an example in which the holding metal fitting 10 is applied to the starting port 16 has been described, but the holding metal fitting 10 can be applied to an arrival opening (not shown). The holding metal fittings applied to the access port have the same structure except that the swing restricting member 46 is not provided, and the positional relationship of the holding metal fittings, packing (exit packing), etc. at the arrival opening. Since this is exactly the same as the arrangement relationship at the starting port 16, detailed description thereof will be omitted to avoid duplication of description. However, with respect to the relationship between the holding metal fitting applied to the arrival port and the shield machine 14, the front surface or the moving direction of the shield machine is the opposite of that shown in the drawing.

The shield excavator 14 propelled in the ground from the starting port 16 to reach the reaching port or the lining of the exit packing hole (26) bent forward in the propelling direction after being penetrated by the lining. The surrounding portion abuts against the rocking member (34) of the holding metal fitting (10) or rocks these. In order to limit the swing of the plurality of swing members (34), the plurality of swing members (34) are connected to each other by wires. Each swing member (34) is provided with a ring for passing the wire. The swinging member (34) with its swinging restrained prevents the portion around the hole (26) of the exit packing and its peripheral portion (28) from bulging out. This prevents the discharge of excavated sand and groundwater from the ground.

[Brief description of drawings]

FIG. 1 is a front view of a holding metal fitting according to the present invention.

2 is a cross-sectional view taken along line 2-2 of FIG.

FIG. 3 is a partially enlarged front view of the holding metal fitting shown in FIG.

FIG. 4 is a cross-sectional view taken along line 4-4 of FIG.

5 is a partially enlarged view of another example of the holding metal fitting as in FIG. 3. FIG.

6 is a cross-sectional view taken along line 6-6 of FIG.

FIG. 7 is a partially enlarged view similar to FIG. 3, of yet another example of the holding metal fitting.

FIG. 8 is a cross-sectional view taken along line 8-8 in FIG.

FIG. 9 is a vertical cross-sectional view of a pressing fitting applied to the opening surface of the starting opening and the inside of the starting opening.

[Explanation of symbols]

 10 Holding metal fittings 12,28 Entrance packing and its peripheral portion 14 Shield type tunnel excavator 16, 18, 48 Start opening and its peripheral portion 30 Tunnel lining material 32,34 Plate member and rocking member of holding metal fitting 36 Plate member Divided pieces 36a, 36b One side and the other side of the L-shaped plate member

Claims (6)

[Scope of utility model registration request] 1. An opening surface of the starting port or an inside thereof for sealing between an object received in a starting port provided in the retaining wall for constructing a tunnel and the retaining wall, A pressing metal fitting for elastically deformable packing having a peripheral edge portion facing a peripheral portion of an opening of the starting opening and a hole capable of receiving the object, the pressing metal fitting facing the peripheral edge portion of the packing and the starting opening. A single plate member or a plurality of divided pieces thereof continuously extending along the opening of, and the plate member or each divided piece is swingably connected and is swung in one direction by contact with the object, A holding metal fitting including a plurality of swing members pressed against the packing. 2. A swing limiting member, which is a member for limiting swinging of each swinging member in the other direction, and which is provided on each swinging member and is capable of contacting the plate member, Claim 1
Presser fitting described in. 3. A swing limiting member which limits swing of the swing member in the other direction and which is provided on the plate member and is capable of contacting each swing member. The holding metal fitting described in 1. 4. The plate member has an L-shaped cross section,
The press fitting according to claim 1, wherein one side of the L-shape faces a peripheral portion of the starting opening, and the other piece of the L-shape extends in the axial direction of the starting opening. 5. An opening surface of the reaching opening or an inside thereof is provided to seal between an object received in the reaching opening provided in the retaining wall for constructing a tunnel and the retaining wall, A pressing metal fitting for elastically deformable packing having a peripheral edge portion facing the peripheral portion of the opening of the arrival opening and a hole capable of receiving the object, the pressing metal fitting being opposed to the peripheral edge portion of the packing and reaching the edge portion. Through a single plate member or a plurality of divided pieces thereof continuously extending along the opening of the mouth, and the packing that is swingably connected to the plate member or each divided piece and elastically deforms by contact with the object A holding metal fitting including a plurality of rocking members that are rocked. 6. The retainer fitting according to claim 5, further comprising a wire connecting the plurality of swing members to each other.