JP2576962B2 - Lining formwork device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining form device for placing lining concrete in a tunnel.

[0002]

2. Description of the Related Art Conventionally, in a formwork device (centre) for placing lining concrete in a tunnel, a slab plate arranged to shield a lining space in which lining concrete is placed from the outside. A gap is inevitably formed along the inner circumference of the tunnel between the tip of the tunnel and the ground wall of the ground. Therefore, in order to prevent concrete poured into the formwork from leaking through such a gap, a gap material such as a rag or newsprint is loaded into the gap, or an air tube is used. By filling the tube with air along the gap, such a gap is closed.

[0003]

However, such a filling material or an air tube must be installed along the end plate every one span of concrete casting, which takes time and labor at the time of installation. In addition, at the time of demolding, it is necessary to peel and remove this from concrete, which is complicated. Therefore,
In some cases, a method in which a plurality of plate-like members are protruded from the inside of the formwork apparatus toward the face so that the lining space is cast into the face in a continuous form up to the face, and a method of shielding the face is sometimes tried. However, in this case, the next time the excavation of the face is started, a so-called hit occurs in a form in which the concrete continuous to the face interferes with the excavation section, which hinders work such as drilling. It is necessary to work to remove the adhered concrete by cutting it with a hydraulic breaker or the like. Therefore, there is an inconvenience that the workability is not improved by using any of these methods. The present invention has been made in view of the above circumstances, and provides a cover frame device that can reliably and easily shield the wife side without forming a gap between the pit wall and the workability and is excellent in workability.

[0004]

That is, the present invention has a formwork (12) having a shape corresponding to the inner periphery of a tunnel lining (32), and the face (3a) of the formwork (12). In the lining form device (11) provided with the stop means (16) at the side end on the side,
The stop means (16) has a plurality of seals (20) arranged along the outer periphery (13) of the form body (12) at the outer peripheral end thereof, and the seal (20) is The seals (20) are provided so as to protrude and retreat outside the outer periphery (13) of the mold body (12), and the seal bodies (20) project outside the mold body (12). Accordingly, the mold is provided so as to continuously overlap with the lining space (15) formed by the mold body (12) in the inner circumferential direction of the tunnel in a protruding state so as to shield the outside. Projection retraction drive means (25, 26, 27) for driving the seal member (20) to project and retreat to the frame (12).
Are provided and configured. The present invention also provides the seal body (20) with a large number of columnar members (201), at least an outer peripheral surface (2) of the seal body (20) such as a seal surface (20c).
0c) cut in the direction intersecting with the outer peripheral surface from the side (21)
Is formed in the form of a box. The numbers and the like in parentheses are for convenience showing the corresponding elements in the drawings, and therefore, the description is not limited to the description on the drawings. below

The same applies to the column of [Action].

[0005]

With the above arrangement, the present invention provides a method for driving a plurality of sealing bodies (2) by driving the projecting and retreating driving means (25, 26, 27) to bring the plurality of sealing bodies (20) into a protruding state.
0) acts so as to abut on a pit wall located outside the lining space (15) in a state of continuously overlapping in the inner circumferential direction of the tunnel. Further, when the seal body (20) comes into contact with the downhole wall, each of the columnar members (201) acts so as to be elastically deformed.

[0006]

FIG. 1 is a side view showing an example of a lining concrete placing device, FIG. 2 is a view taken in the direction of the arrow II in FIG. 1, and FIG. FIG. 4 is an enlarged view, FIG. 4 is a top view of the wife stop device shown in FIG. 3, and FIG.
FIG. 6 is a top view showing an example of a supporting mode of the wife stopper in the wife stopper shown in FIG. 3, and FIG. 7 is a perspective view showing an example of a seal body used in the wife stopper shown in FIG. 8, FIG. 8 is a partially omitted side view showing an example of a lining form device portion at the time of concrete placing work by the lining concrete placing device shown in FIG. 1, and FIG. FIG. 10 is a perspective view showing another example of a stop for a wife.

As shown in FIG. 1, a tunnel 1 under construction is placed in a ground 2 made of hard rock or the like from the direction of arrow B to the direction of arrow A in FIG. A tunnel 3 excavated by controlled blasting or the like is provided, and a lining concrete placing device 5 is temporarily supported on an invert 3b of the tunnel 3 at the left end of FIG. It is arranged in the form that is done. The lining concrete placing device 5 has a moving vehicle 6, and a vehicle body 6 b of the moving vehicle 6 is movable in the tunnel 3 via a crawler 6 a disposed below the vehicle body 6. ing. An engine unit 6c and the like are mounted on a rear portion shown on the right side of FIG. 1 on the vehicle body 6b, while an elevating unit constituted by links 7a, 7a, a hydraulic cylinder 7b and the like are provided on a front side shown on the left side of the vehicle body 6b in FIG. A device 7 is provided in such a manner that the base end side of the link 7a shown in the right end of FIG. 1 is pivotally supported on the vehicle body 6b. On the left end side in FIG. 1, which is the tip side of the links 7a, 7a,
The elevating scaffold 9 is pivotally supported by a vertically movable device via a link mechanism of the elevating device 7. At the upper part of the elevating device 9, a step 91 is provided with an arrow A, which is the direction of the tunnel, via the legs of the step 91 and the hydraulic cylinder 92, etc.
It is provided so as to be capable of protruding and retracting in the direction B, and a step 91 is provided with a form support frame 10 formed by assembling a shaped steel or the like.
It is supported on the step 91 via hydraulic cylinders 10a, 10a standing upright in FIG.

As shown in FIG. 2, an inner mold 11 having an overall shape similar to the cross-sectional shape of the tunnel 1 is mounted and supported on the mold support frame 10.
1 has a frame 12 which is formed in a semicircular shape along the inner peripheral surface of the tunnel 3. In frame 12,
As shown in FIG. 2, four joints 12b are provided in the middle of the frame 12 along the inner circumferential direction of the tunnel, and five joints 12b are provided through the four joints 12b. Frame piece 12a. In addition,
The frame 12 is connected to the joint 12 via a support jack, a hydraulic cylinder, and the like (not shown) supported on the lifting scaffold 9.
As shown by the dashed line in FIG. 2 at the boundary of b, it is configured such that it can be bent in the tunnel 3. Frame 1
3, is formed in a shape corresponding to the inner periphery of the tunnel lining by a steel plate member and an assembling joining member of the steel plate member, as shown in FIG. 3, that is, shown in the upper part of each frame piece 12a in FIG. On the ground 2 side, a mold plate 13 formed in a smooth arc shape so that the inner peripheral surface of the tunnel lining 32 to be constructed on the upper surface side of FIG. It is provided integrally in the form of an egg. Therefore, the form plate 13 forms the outer periphery of the frame 12 by forming the outer peripheral surface of each frame piece 12a. Further, a concrete supply port 121 is provided at the vertex of the inner circumferential direction of the frame 12, and the discharge port of the concrete supply port 121 is formed on the outside of the form plate 13 on the upper side of FIG. That is, the outlet is directed to the ground 2 side.
As shown in FIG. 1, a tip tube 30a of a pumping tube 30 is provided at a supply source side shown below the concrete supply port 121 in FIG. 3 through a concrete pump (not shown). Are connected in such a manner that they can be supplied under pressure.

As shown in FIG. 1 or FIG. 8, between the form plate 13 of the frame 12 and the ground 2, a lining space 15 into which lining concrete is cast later has a substantially semi-annular shape. The lining space 15 is formed on the rear side shown on the right side in FIG.
A lining 32 having a width of one turn of L1 is constructed and arranged in a long body shape in a form in which concrete is already poured into the lining space 15 for lining. Further, in the lining space 15, a support 33 shown in FIG. 8, which is made of a shaped steel or the like and has a shape along the inner peripheral surface of the tunnel 3 perpendicular to the plane of FIG. The shoring 33 is also embedded at a predetermined pitch in the lining 32 which has already been constructed. Outside the rear end (upper side in FIG. 3) of the frame 12 at the right end in FIG.
It is fitted in a shape formed in a semi-annular shape in a direction perpendicular to the paper surface, and an air tube 291 is provided inside the seal member 29 shown in the lower side of FIG. 3, and compressed air is supplied into the air tube. 3 and is formed in a semi-annular shape in a direction orthogonal to the plane of FIG. 3 along the tunnel sectional shape. An air compressor (not shown) is connected to the air tube 291. The air tube 291 wraps the sealing material 29 via the air compressor and the arrows C and D in FIG.
The outer side in the radial direction with respect to the tunnel section shown in FIG.
It is configured so that it can be pushed out toward the upper side by the height L2 shown in FIG. That is, compressed air is supplied and filled into the air tube 291 in a state where the sealing material 29 is sandwiched between the outer periphery of the rear end portion of the frame 12 and the lining 32 which has already been cast and constructed with the concrete 31. 3 is pressed in the vertical direction in FIG. 3 by the frame 12 and the lining 32 by an amount corresponding to the height L2 (the shape is pressed in the directions of arrows C and D, which are radial directions of the tunnel cross section). It is configured so that the frame 12 and the lining 32 can be closely connected. Further, as shown in FIG. 1, a face 3a of the tunnel 3 is disposed in front of the frame 12 in the direction of arrow A, and the face 3a has a cross section of the tunnel 3 with its mirror surface having some unevenness. It has a substantially semicircular shape.

A frame stop 16 is provided at a side end of the frame 12 on the side of the face 3a, that is, at a front end shown on the left side of FIG. 1, and the frame stop 16 is, as shown in FIG. Are supported by guide frames 17 fixedly mounted on the end faces of the frame pieces 12a in the direction of arrow A. That is, as shown in FIG. 6, a large number of guide grooves 171 extend in the direction perpendicular to the plane of FIG. 6 (the vertical direction in FIG. 3) in the front of the guide frame 17 in the direction of arrow A. As shown in FIG. 3 or FIG. 6, the guide frame 17 is formed in a box shape with a predetermined length in the vertical direction in FIG. A plurality of support frames 19 are provided side by side along the inner circumferential direction of the tunnel so as to be slidably fitted in and supported by the guide grooves 171 in a direction perpendicular to the plane of FIG. 6 (vertical direction in FIG. 3). A seal body 20 formed in a block shape is provided on the outer peripheral end portion (upper side in FIG. 3) of the support frame 19 via the guide groove 171 and the support frame 19 from the state shown in FIG. 5 and 8 together with the support frame 17 so as to protrude outward in the direction of arrow C which is radially outward with respect to the tunnel cross section by a predetermined distance L6 shown in FIG. As shown by an alternate long and short dash line in FIG. A plurality (arranged in a semicircle) is provided along the outer peripheral surface in a free manner.

As shown in FIG. 7, each seal body 20 is formed by forming an independent foaming sponge as an elastic body in the form of a block. The seal body 20 has a support surface 20a side shown in the lower part of FIG. Is the upper end of the support frame 17 (the upper end in FIG. 3)
The portion is mounted and supported on the support frame 19 by an adhesive or the like. In addition, the seal body 20 is configured such that the joint surfaces 20b, 20b, which are side surfaces in the left-right direction in FIG. 7, are in close contact with and overlap with the joint surfaces 20b, 20b of the adjacent seal body 20 by the length L3. As shown in the figure, the sealing member 2 is disposed so as to continuously overlap in the inner circumferential direction of the tunnel.
Numeral 0 is a shape that continuously overlaps in the tunnel inner circumferential direction in the protruding state shown by the dashed line in FIG. Therefore, when the sealing member 20 projects together with the support frame 19 to the outside of the frame 12 (upper side in FIG. 3), the spigot 16 divides the tunnel 3 in the front-rear direction indicated by arrows A and B, thereby The lining space 15 is
It can be shielded from outside. In addition, a notch 21 is formed from the sealing surface 20a, which is the upper surface of the sealing body 20 in FIG.
In the form formed by cutting a predetermined length L4 in a direction orthogonal to 0a, a large number is provided at a predetermined pitch (in the embodiment, at a pitch of 30 mm) in the directions of the arrows P and Q and the directions of the arrows R and S, A number of rods 2 are provided at the outer end of the seal body 20.
A large number 01 is provided in such a form that the seal body 20 is divided into a columnar member by a large number of cuts 21. A large number of rods 201 are in close contact with each other without a gap therebetween, and are in a state of standing along the arrows T and U, which are the vertical directions in FIG.
As described above, the seal body 20 has an outer end shown on the upper side of FIG. 3 of the support frame 19 with the seal surface 20a on the side on which the rod body 201 is formed facing the ground 2 on the outside of the frame 12. It is mounted and supported by the unit. Each of the seals 20 is supported by one guide frame 17 for a predetermined number of seals 20 via a support frame 19.

The arrow D on the support frame 19
As shown in FIG. 3, the seal body 20 and the support frame 19 are disposed radially inward (in the lower side in FIG. 3) with respect to the tunnel cross section indicated by arrows C and D in FIG. 3 Winding spring 2 that can be projected upward (ie, in the C direction)
5 is disposed along the inner circumferential direction of the tunnel such that the outer free end side is connected to each support frame 19, and the winding spring 16 places the frame 19 on the outer side of the tunnel cross section. 3. The inner mold 11 is supported on the frame 12 side of the inner mold 11 in such a manner as to be constantly biased upward (in the direction of arrow C). On the other hand, on the inner peripheral surface of the frame 12, as shown in FIG.
Hydraulic cylinders 26 that can be retracted are mounted on the lower side (in a form in which one hydraulic cylinder 26 is provided for each of the predetermined number of seal bodies 20 and, therefore, the frame 19). 26, a piston rod 261 is fitted and supported so as to be able to protrude and retreat in a direction indicated by arrows A and B by a predetermined stroke L5 in such a manner that its protruding direction is directed rearward (rightward in FIG. 3) of the hydraulic cylinder 26. I have. A sheave 262 is fitted to the end of the piston rod 261 in the direction of arrow B, which is the tip of the piston rod 261.
, A predetermined number of wires 27 are connected as shown in FIG. The distal end side of each wire 27 is connected to the support frame 19, and the pulling direction is changed through two guide rollers 28A and 28B shown in FIG. It is connected.
The guide rollers 28A and 28B are connected to the frame 1 of the inner mold 11.
2, each is fixedly mounted in a rotatable form,
The guide rollers 28 </ b> A and 28 </ b> B are provided along the inner peripheral surface of the frame 12 in such a manner as to be provided in a number corresponding to the number of the hydraulic cylinders 26. Accordingly, the hydraulic cylinder 26 is configured such that the seal body 20 is supported together with the support frame 19 and the sealing surface 20 c of the hydraulic cylinder 26 is aligned with the outer peripheral surface of the form plate 13 via the wire 27 in such a manner as to oppose the urging force of the winding spring 25. Thus, the frame 12 is retained on the front surface of the frame 12, that is, on the side end on the side of the cutting face 3a (in the direction of arrow A).

Further, as shown in FIG. 8, a leg seal 35 for sealing between the frame 12 and the invert 3b is provided at a lower portion of the frame 12, and the leg seal 35 is connected via a hinge 361. A folding support frame 36 is provided on the back side of FIG. 8. A large number of sealing members 37 each formed in a strip shape are provided on the support frame 36.
Each of them is engaged and supported via guide means indicated by a dotted line in FIG. 8 so as to be movable up and down, and a projection 371 is formed at the upper end of each seal member 37. A stopper rail 362 is stretched over the leg seal 35 so that each seal member 37 cannot fall off.

[0013] Since the tunnel 1 and the like under construction have the above-described structure, while the excavating work and the shearing work are being performed on the face 3a, the lining concrete placing device 5 is operated by the lifting scaffold. 9 supporting the crawler 6
a, arrow B in the tunnel 3 via the engine unit 6c, etc.
It has been evacuated while being moved in the direction. Note that, in this state, the frame 12 of the inner mold 11 is bent inward of the tunnel 3 as shown by a dashed line in FIG. Since the air is not supplied, the sealing material 29 disposed at the rear end (the direction of the arrow B) of the frame 12 is located radially inward of the tunnel cross section in the direction of the arrow D from the state shown in FIG. Therefore, the form plate 13 of the frame 12 is not connected to the constructed lining 32. At this time, the leg seal 35 has the support frame 36 folded in a direction orthogonal to the plane of FIG. 8 via the hinge 361. Then, the support frame 36
Are folded together with the support frame 36 inward in the direction orthogonal to the plane of FIG. 8 with respect to the tunnel section, whereby the frame 12 is also connected to the invert 3b. Has no state. On the other hand, in a state where the entire lining concrete placing device 5 is retracted, the piston rods 261 of all the hydraulic cylinders 26 are made to protrude in the direction of arrow B by the full stroke L5. Then, the hydraulic cylinder 2
The predetermined number of wires 27 connected to 6 are pulled in the direction of arrow B ′ in FIG. 3 through the sheave 262, and the direction of pulling of the wires 27 is changed through the guide rollers 28A and 28B. The support frame 19 is transmitted to the support frame 19 in the form of an arrow and is pulled radially inward in the direction of arrow D with respect to the tunnel cross section. Then, the arrow C on the outer side with respect to the tunnel sectional direction is formed by the winding spring 25.
The support frame 19 urged in the direction
0 is mounted and supported by the hydraulic cylinder 26 against the urging force of the winding spring 25 in the direction of arrow D. As a result, as shown in FIG.
c is aligned with the frame 13 which is the outer periphery of the frame 12, and a frame 19 is attached to the side end surface of the frame 12 on the side of the face 3 a.
And the state where the seal body 20 is stored is suspended. At this time, as shown in FIG.
The lining space 1 on the rear side of the lining space 15 shown in FIG.
5. Concrete 31 is cast on the front end 32a.
Is constructed up to the position immediately before the face 3a. Then, the tunnel 3 is excavated and formed by a distance corresponding to one span, that is, a distance corresponding to the lining winding width L1 from the face 3a (not shown) formed in the previous excavation process, and the excavation work and slipping out related thereto are performed. When the work is completed, the shoring 3 is placed on the newly dug portion where the lining has not yet been formed just before the face 3a.
3 and the moving vehicle 6 is pointed by the arrow A
In the direction shown in FIG.
Position below.

In this state, the hydraulic cylinder 7 of the lifting device 7
b, the lifting platform 9 is raised in the direction of arrow C in FIG. 1 and the hydraulic cylinder 92 is driven to move the step 91 in the directions of arrows A and B in FIG.
1 is aligned and arranged directly below the ground portion where the lining is not yet constructed where the concrete 31 is to be cast. Next, the hydraulic cylinders 10a and 10a are driven to raise the form support frame 10, and the frame 12 is moved via a hydraulic cylinder and a support jack (not shown) in FIG.
As shown in the figure, it is expanded in an arc shape. Here, when compressed air is supplied into the air tube 291 via an air compressor or the like, the air tube 291 attempts to push out the sealing material 29 in the direction of arrow C while being restrained by the frame 12. Then, the sealing material 29 disposed at the left end of FIG. 8 which is the rear end of the frame 12 is sandwiched between the frame 12 and the inner peripheral surface of the lining 32 already constructed, and the compressed air is supplied to the air. In the form of being pushed in the direction of arrow C by the tube 291, it is pushed outward in the radial direction of the tunnel cross section. Then, the rear side of the frame 12 at the end in the direction of arrow B is sealed by the sealing material 29 so that the frame 12
Is connected to the constructed lining 32. Then, the form plate 13 which is a member constituting the outer peripheral surface of the frame 12 is connected to the front end 32a of the lining 32 which has already been formed by driving the rear end side in the direction of arrow B in the direction of arrow B. It is positioned along the inner peripheral surface of the ground part where the lining has not yet been constructed. Thus, the inner formwork 11 of the lining concrete placing device 5 is prepared in a state where the concrete 31 can be placed.

Then, each hydraulic cylinder 26
The piston rod 261 is retracted from the state shown in FIG. 3 in the direction of arrow A by the stroke L5 as shown in FIG. Then, the sheave 26 of each hydraulic cylinder 26
1 moves in the direction of arrow A, whereby the traction force of the wire 27 connected to the hydraulic cylinder 26 is released. Then, the support frame 19 is restored to a state in which the support frame 19 is urged in the direction of arrow C which is the outer side with respect to the radial direction of the tunnel cross section of the winding spring 25, whereby the seal body 20 is mounted on the outer side (upper side in FIG. 3). The supported support frame 19 is guided through the guide groove 171 of the guide frame 17,
As shown in FIG. 9, until the sealing surface 20 c of the sealing body 20 comes into contact with the inner peripheral surface of the ground 2,
9 protrudes outward by a distance L6 in FIG. At this time, the tunnel wall of the tunnel 3 forming the inner peripheral surface of the ground 2
Although the cross-sectional circumferential length is larger than the circumferential distance of the mold body 13 which forms the outer periphery of the frame 12, the seal body 20 has joint surfaces 20b, 2b, 2c as shown in FIG.
0b is overlapped with the joint surfaces 20b, 20b of the adjacent seal body 20 by the length L3, so that even in the protruding state, the state of continuously overlapping in the inner circumferential direction of the tunnel is maintained. I have. Further, since each of the seal bodies 20 projects in the direction of arrow C in a form urged by the winding spring 25 via the support frame 19, the spigot stopper 16 is formed by the unevenness formed on the ground. The body 20 is different from the projecting state, and all the sealing surfaces 20c of the sealing bodies 20 are in close contact with the downhole wall. Further, each of the seal bodies 20 is provided with a winding spring 25.
, Ie, the sealing surface 20c is pressed against the pit wall by the urging force in the direction of arrow C, whereby the sealing body 2
0 is a shape pressed in the directions of arrows C and D which are radial directions with respect to the tunnel cross section. Then, each seal body 20 has a cut 21 formed on the seal surface 20 c side thereof, and the respective seal surfaces 2 are cut through the cut 21.
As shown in FIG. 8, 0c deforms so as to flex and shrink in the directions of arrows C and D in a form that closely follows the unevenness of the ground. That is,
As shown in FIG.
By forming the cuts 21 on the c side, a large number of rods 201 are continuously arranged in the directions of arrows P, Q, R, and S without gaps, respectively. When pressed in the directions C and D, each of the rods 201 is deformed by its elasticity so as to penetrate to the depth thereof according to the unevenness of the ground, and becomes self-expanding and contracting. At this time, since the seal body 20 is a closed-cell sponge,
Arrows P and Q with respect to the axial force in the directions of arrows C and D, ie, the pressing force
Since the lateral strain in the direction and the arrows R and S directions easily occurs, even after the deformation, the rods 201 are in close contact with each other, and almost no new gap is formed between the rods 201. , Each of which can suitably self-expand and contract. At the same time, the seal body 20 has a notch 2 therein.
The entirety of the seal body 20 can be elastically deformed in such a manner that a portion where 1 is not formed is pressed in the directions of arrows C and D. Then, all the seal bodies 20 are in close contact with the ground 2 without a gap between the seal surface 20c of the seal body 20 and the unevenness of the ground of the pit wall portion. 19 is the frame 1 of the inner mold 11
2 and the pit wall of the ground 2 can be shielded and divided in the directions of arrows A and B. Thus, the frame 12 of the inner mold 11
Is a seal member 29 arranged at the rear end portion shown in the direction of arrow A, and a plurality of support frames 1 arranged at the face 3a side.
The ground 9 is tightly connected to the ground 2 by the seal 9 and the seal body 20.
Therefore, a support frame 36 of the leg seal 35 shown in FIG. 8 which is arranged below the frame 12 in FIG. 2 (that is, in FIG. As shown in FIG. 8, the seal member 37 is expanded to the lower side in FIG. 8, and a plurality of seal members 37 engaged with and supported by the support frame 36 are moved to the lower end portions thereof according to the unevenness of the invert 3b. Is invert 3b
Is moved up and down as needed until the frame 12 and the invert 3b are sealed. Then, the front end 32a of the lining 32 already constructed and the face 3
A lining space 15 is formed in a semi-annular shape along the inner peripheral surface of the tunnel 3 between the lining space 15 and the space a. At the same time that the lining space 15 is shielded and formed, the working space in the tunnel 3 immediately before the face 3a, that is, the portion of the tunnel 3 located in the direction of the arrow B is supported by the form support frame 10. The inner formwork 11 is temporarily covered in a semi-annular form by the frame 12 of the inner formwork 11, whereby the ground 2 that has been excavated and is still uncovered and is still in an unstable state can be worked immediately before the face 3 a. The danger of falling into the space is eliminated, and the lining space 15
It is possible to safely proceed with concrete placing work inside and further new excavation work.

After the lining space 15 is thus shielded, the tip tube 30a of the pumping tube 30 is next turned on.
Is connected to the concrete supply port 121 of the frame 12 as shown in FIG.
Then, concrete 31 is pumped and supplied through a concrete pump (not shown), and concrete 31 is discharged into the lining space 15 in a form of discharging the concrete into the inside of the form plate 13.
And filling. Then, the lining space 15 is arranged outside the frame 12 via the stop 16 while the frame 12 of the inner mold 11 is connected to the lining 32 already constructed via the sealing material 29. By being closely connected to the ground 2, since the gap with the outside is shielded and formed, the concrete 31 supplied to the lining space 15 leaks out of the lining space 15. The concrete 31 is densely filled into the corners of the space 15 without performing. As described above, when the plurality of seal bodies 20 are pressed in the directions of arrows C and D at the time of projecting, the outer periphery of the seal body 20 in the radial direction, that is, the outer periphery of the seal surface 20c side becomes a large number. Although the notch 21 is slightly expanded and deformed, even if the unhardened concrete 31 which is a fluid enters the notched part 21 of the expanded and deformed portion, the arrows P, Q, R, and S directions Rods 2 at the center of the seal body 20 in a state of standing without gaps
Since 01 blocks the flow of the concrete 31, the seal body 20 can sufficiently perform its sealing function. In this way, the concrete 31 is densely filled in the lining space 15, but at this time, since the sealing body 20 is a closed-cell sponge, each of the foaming gaps inside the sealing body 20 does not communicate. Accordingly, the uncured concrete 31, which is a fluid, flows through the foaming gap, and does not leak out, and the concrete 31 only in the lining space 15 corresponds to the shape of the lining 32 of the tunnel 1. It is cast and filled in a semi-annular shape.

Thus, the concrete 3 is placed in the lining space 15.
1 and the whole of the lining space 15 is filled with the concrete 31, and then the concrete supply port 12 is filled.
1 is appropriately closed to complete the concrete placing and filling work. Then, the concrete 3 poured into the lining space 15
No. 1 starts to solidify quickly and reaches a demoldable hardened state after a predetermined short time. Then, next, when the piston rod 261 of the hydraulic cylinder 26 is again driven to protrude in the direction of arrow B as shown in FIG. 3, the predetermined number of wires 27 connected to the hydraulic cylinder 26 are again 3 is transmitted through the guide frames 28A and 28B to the respective support frames 19 in such a manner that the wires 27 are pulled in the direction of the arrow B 'in FIG. 19
Are stored in the direction of arrow D against the urging force of the winding spring 25. In this manner, the frame 12 of the inner mold 11 is bent into the tunnel 3 as shown by a dashed line in FIG. 3 via a hydraulic cylinder and a support jack (not shown), and the hydraulic cylinders 10a and 10a are driven to form support. The frame 10 is lowered in the direction of arrow D. Then, the lining space 15
The inner frame 11 is removed from the concrete 31 placed in the mold 11 so that the form plate 13 is separated from the concrete 31.

When the removal of the inner mold 11 is completed, the support frames 36 of the leg seals 37 are folded inwardly of the tunnel 3 via the hinges 361, and the air supplied to the air tubes 291 is provided. To release these seals. Then, next, the lifting device 7
Then, the moving vehicle 6 is moved in the direction of the arrow B of the tunnel 3, and the entire lining concrete placing device 5 is removed from the front of the face 3a. At this time, since the entire stop 16 has already been housed in the end face of the frame 12 of the inner formwork 11 on the face 3a side as shown in FIG. Will be removed. Thus, the lining space 1 in which the concrete 31 is cast as described above.
5 is a lining 32 which has already been constructed as shown in FIG.
Is extended in the direction of the arrow A from the front end 32a side to the face immediately before the face 3a, and the ground 2 is entirely exposed to the face just before the face 3a without being exposed in the tunnel 3. Therefore, when the excavation work of the face 3a is started next, the excavation work can be smoothly restarted while the ground 2 is not loosened and the stability is already secured. Moreover, since the concrete 31 is poured into the lining space 15 in a state where the face 3a side is shielded by the dam stopper 16, the concrete 31 is not attached to the face 3a at all, and When excavating the face 3a, the concrete 31 does not interfere with the excavated cross section. Therefore, the excavation work of the face 3a is started again, and the width L1 of one turn of the lining 32 is
When the excavation of the face 3a is advanced by one span corresponding to the above, the ground portion where the lining is to be constructed is formed again as described above. Therefore, by repeating the operation of positioning the inner form 11 and laying and filling the concrete 31 by using the lining concrete laying device 5 on the ground portion as described above, the concrete is always worked without any trouble. The lining 32 is continuously formed in the directions of the arrows A and B in a form in which leakage of the ground is suitably prevented, so that the robust tunnel 1 can be constructed without loosening or expanding the ground 2. .

In the stop 16 described in the above embodiment, a plurality of seals 20 continuously arranged along the inner periphery of the tunnel are supported by a support frame 19. Although the example in which the coil spring 20 is biased radially outward with respect to the cross-sectional direction of the tunnel by the winding spring 25 has been described, the seal body 20 has a telescopic multi-stage support as shown in FIG. A plurality of winding springs 25 'are supported by the frame 19'.
May be urged so as to protrude radially outward with respect to the tunnel cross-section.
The seal body 20 may be driven to protrude in the radial direction by another lifting means instead of 25 '. Furthermore, the sealing body 2
Frame 19 for supporting the support frame 0 and the support frame 19
The shape of the guide frame 17 for fitting and supporting the guide frame 17 and the manner of supporting the guide frame 17 are not limited to the above-described embodiment. Further, the shape and material of each seal body 20 are not limited to those described in the embodiments. Further, the configuration of the device used for the lining concrete placing device 5 and the method for constructing the lining 32 in the tunnel 1 and the configuration of the device and members used therefor are not limited to the above-described embodiment. In other words, the inner mold 1
The lining form device according to the present invention such as No. 1 can be used in any application mode other than the above-described embodiment.

[0017]

As described above, according to the present invention,
A mold frame such as a frame 12 corresponding to the inner circumference of the tunnel lining such as the lining 32 is provided, and a buckle means such as a buckle 16 is provided at a side end of the form body on the face 3a side. In the lining form device such as the inner form 11 or the like, the end stop means has a plurality of seals 20 arranged along the outer periphery of the form such as the form plate 13 at the outer end thereof. The seal body 20 is provided on the outer periphery of the form body so as to protrude and retreat, respectively,
The seal bodies 20 are formed so that the seal bodies 20 protrude outside the mold body so as to shield the lining space such as the lining space 15 formed by the mold body from the outside. In the protruding state, the sealing body 20 is provided so as to continuously overlap in the inner circumferential direction of the tunnel, and
Spring 25, hydraulic cylinder 26,
Since the protruding / retracting drive means such as the wire 27 is provided, when the protruding / retreating drive means is driven to bring the plurality of seals 20 into the protruding state, the plurality of seals 20 continuously overlap in the inner circumferential direction of the tunnel. In this state, it can abut against a pit wall located outside the lining space. Therefore,
Only by driving the projecting and retreating driving means to project the seal body, the plurality of seal bodies 20 abut on the pit wall in a state where the plurality of seal bodies 20 are continuously overlapped at the side end on the face 3a side of the formwork body, that is, the wife side. Thus, the splicing means can easily shield the space between the outer periphery of the form body and the pit wall without forming a gap between the outer end portion of each seal body 20 and the pit wall, It is possible to prevent leakage of concrete poured into the lining placement space. Also, after the work of filling the concrete into the lining space is completed, the shielded state by the damming means can be easily released simply by driving the projecting and retreating driving means. Therefore, the next work following the completion of the concrete placing work can be started promptly, and the workability is excellent. In addition, a number of columnar members such as the rod 201 are cut into the seal body 20 at least from the outer peripheral surface side of the seal body 20 such as the seal surface 20c in a direction crossing the outer peripheral surface. When formed, each of the columnar members can be elastically deformed when the seal body 20 is brought into contact with the pit wall. Then, each of the columnar members is elastically deformed so as to follow the depth of the pit wall unevenness so as to follow the pit wall, thereby securely sealing between the seal body 20 and the pit wall. Airtightness is further improved. Therefore,
Even in the case where complicated unevenness occurs on the ground pit wall, since the seal body 20 closely follows this, the splicing means is always driven into the form body regardless of various ground conditions. Concrete leakage can be prevented with high quality.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a lining concrete placing device.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3 is an enlarged view of a part of a bucking device in the lining concrete placing device shown in FIG. 1;

FIG. 4 is a top view of the wife stop device shown in FIG. 3;

FIG. 5 is a view taken in the direction of arrow V in FIG. 4;

FIG. 6 is a top view showing an example of a support mode of the wife stop in the wife stop device shown in FIG. 3;

FIG. 7 is a perspective view showing an example of a seal body used in the wife stop device shown in FIG. 3;

FIG. 8 is a partially omitted side view showing an example of a lining form device at the time of concrete placing operation by the lining concrete placing device shown in FIG. 1;

FIG. 9 is a view showing a projecting operation of the wife stop in the wife stop device shown in FIG. 3;

FIG. 10 is a perspective view showing another example of a wife stop.

[Explanation of symbols]

 3a ... face 11 ... lining form device (inner form) 12 ... form body (frame) 13 ... outer periphery of the form body (form plate) 15 ... lining setting space (lining) (Space) 16 ... wife stop means (wife stop) 20 ... seal body 20 c ... outer peripheral surface (seal surface) 201 ... columnar member (rod body) 21 ... cut 25 ... projecting retreat drive means (winding spring) 26: Projection retreat drive means (hydraulic cylinder) 27 ... Projection retreat drive means (wire) 32 ... Tunnel lining (lining)

Claims (2)

(57) [Claims] 1. A lining formwork apparatus having a formwork body corresponding to the inner periphery of a tunnel lining, and having buckling means provided at a side end of the formwork on the face side. The means has a plurality of seals disposed along the outer periphery of the mold body at the outer peripheral end thereof, and the seal bodies are provided so as to protrude and retreat outside the outer periphery of the mold body, respectively. The seal body projects in the tunnel inner circumferential direction in the protruding state so that the seal body projects outside the mold body so as to shield the lining installation space formed by the mold body and the outside. A lining formwork device which is provided so as to be continuously overlapped, and is provided with a projecting and retreating drive means for projecting and retreating the seal body on the formwork body. 2. The lining according to claim 1, wherein a number of columnar members are formed in the seal body so as to cut at least from the outer peripheral surface side of the seal body in a direction intersecting the outer peripheral surface. Formwork equipment.