JP2017193885A - Reconstruction method of lining part in existing 2-traffic lane road tunnel - Google Patents

Abstract

[PROBLEMS] The construction cost is low, the construction period is short, the tunnel cross section after repair is not reduced, and the durability of the tunnel is ensured while exhibiting the advantages of ensuring the passage of vehicles in the tunnel even during repair. To provide a method for rebuilding the lining part of a tunnel that can construct a new inner wall surface.
A method for reconstructing a lining portion of an existing two-lane road tunnel, wherein the cutting operation includes a cutting process using a cutting machine 4 provided with a drum cutter 41 provided with a number of bits on the peripheral surface. The inner wall construction work is performed in the work space 3 formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2, and the repair and waterproof sheet construction process is performed on the protector 2 in the work space 3. And a lining concrete placing process using the lining mold 5 movably arranged.
[Selection] Figure 1

Description

  The present invention relates to a method for rebuilding a lining portion of a tunnel, and more particularly to a method for rebuilding a lining portion of an existing two-lane road tunnel.

  Conventionally, in mountain tunnels, the inner wall surface of the tunnel is constructed with lining concrete, but this lining concrete is subject to cracking, peeling, floating, etc. Because damage occurs, repair is necessary.

  As this repair method, for example, methods such as demolishing and remodeling the inner wall surface, bolstering a lock bolt, reinforcing inner winding concrete or inner winding support, or adding invert concrete are known. Yes.

However, conventional repair methods have problems such as high construction costs, long construction periods, and reduced tunnel cross sections after repairs.
In particular, the conventional repair method has a restriction that during the repair, the tunnel must be completely closed, or the construction must be performed with a one-side regulation with danger.

  By the way, in order to solve the problems of the conventional repair method, the wall work space and the vehicle traffic space are blocked by providing a shelter that can move along the length of the existing tunnel. While forming and suspending the inner wall surface of the existing tunnel with a predetermined thickness in the wall surface working space, the high-strength mortar with a predetermined thickness is applied to the surface of the suspension, and the shelter is attached in the length direction of the tunnel. A tunnel repairing method has been proposed in which the construction is continuously carried out by moving to (see Patent Document 1).

Japanese Patent Laid-Open No. 11-173088

The tunnel repair method described in Patent Document 1 solves the problems of the conventional repair method, and can ensure the passage of vehicles in the tunnel even during the repair, that is, the tunnel lining part under the live line. It had the advantage that it can be renovated.
However, in this tunnel repair method, the inner wall surface of the existing tunnel is suspended with a predetermined thickness, so that a defect such as a crack is newly generated in the remaining portion of the inner wall of the existing tunnel due to the impact during suspension. However, since a new inner wall surface is constructed by applying high-strength mortar, there is a problem in terms of durability.

  In view of the problems of the tunnel repair method described in Patent Document 1, the present invention has a low construction cost, a short construction period, no reduction in the cross-section of the tunnel after the repair, and the inside of the tunnel even during the repair. It is an object of the present invention to provide a method for remodeling a tunnel lining portion that can construct a new inner wall surface that is excellent in durability while exhibiting the advantage of ensuring the passage of a vehicle.

  In order to achieve the above object, the method of remodeling the lining part of the existing two-lane road tunnel according to the first aspect of the present invention is a protector that secures a one-lane passage that allows vehicles to pass through the existing two-lane road tunnel. Is installed in the work space formed between the inner wall surface of the tunnel and the outer wall surface of the protector while intermittently moving the protector along the tunnel length direction. This is a method of remodeling the lining part of an existing two-lane road tunnel, in which the inner wall surface made of concrete lining is removed at a predetermined thickness and the inner wall surface is constructed to construct a new inner wall surface. The cutting operation consists of a cutting process using a cutting machine equipped with a drum cutter having a number of bits on the peripheral surface, and the inner wall construction operation is performed between the inner wall surface of the tunnel and the outer wall surface of the protector. Repair work, waterproof sheet construction process to be carried out in the work space formed in, and lining concrete placing process using a lining formwork arranged so as to be movable with respect to the protector in the work space It is characterized by.

  In addition, in order to achieve the same purpose, the lining method of the existing two-lane road tunnel according to the second aspect of the invention secures a one-lane passage that allows vehicles to pass through the existing two-lane road tunnel. A protector that can be moved along the length of the tunnel is provided, and the protector is moved intermittently in the length direction of the tunnel, while the work space is formed between the inner wall surface of the tunnel and the outer wall surface of the protector. Method for reconstructing the lining part of an existing two-lane road tunnel that performs the cutting work to remove the inner wall surface made of existing lining concrete at a predetermined thickness and the inner wall surface construction work to construct a new inner wall surface The cutting operation includes a cutting process using a cutting machine provided with a drum cutter having a number of bits provided on a peripheral surface, and the inner wall surface construction operation includes an inner wall surface of a tunnel and an outer wall of a protector. It carried out in the work space formed between the repair and tarpaulin construction process, characterized by comprising a precast concrete panel installation process using a precast concrete panel installation apparatus provided behind the protector.

  In this case, the inner wall surface made of the existing lining concrete is removed with a predetermined thickness, and a cutting process using a cutting machine equipped with a drum cutter provided with a number of bits on the peripheral surface is combined with the inner wall surface of the tunnel. A support member formed in an arch shape along the circumferential direction of the inner wall surface of the tunnel disposed so as to be movable with respect to the protector within a work space formed between the outer wall surface of the protector and the support member A cutting machine having two or more drum cutters arranged on a movable support table, and at least two of the drum cutters move the mounting position of the rotation support shaft of the drum cutter to the movable support table. Cutting is performed in a wider range than the installation angle of the support member formed in an arch shape by using cutting machines that are offset in the opposite directions with respect to the moving direction of the support base. It can be.

Further, an unloading device for unloading cutting waste generated by a cutting operation for removing the inner wall surface made of the existing lining concrete with a predetermined thickness is formed between the inner wall surface of the tunnel and the outer wall surface of the protector. It can arrange | position so that driving | running | working in the working space is possible.

  According to the renovation method of the lining part of the existing two-lane road tunnel according to the first and second inventions, the construction cost is low, the construction period is short, the tunnel cross section after repair is not reduced, and even during repair The remaining part of the inner wall of the existing tunnel can be obtained by performing a cutting operation using a cutting machine equipped with a drum cutter with a number of bits on the peripheral surface while demonstrating the advantage of ensuring the passage of vehicles in the tunnel. In order to prevent new defects such as cracks from occurring, a new inner wall surface made of cast lining concrete or precast concrete panel constructed using a lining formwork is built. be able to.

  Further, a cutting process using a cutting machine provided with a drum cutter provided with a number of bits on the peripheral surface, which removes the existing inner wall surface made of lining concrete with a predetermined thickness, includes the inner wall surface of the tunnel and the protector. A support member formed in an arch shape along the circumferential direction of the inner wall surface of the tunnel disposed so as to be movable with respect to the protector in a working space formed between the outer wall surface and movable along the support member A cutting machine having two or more drum cutters arranged on a movable support table, and at least two of the drum cutters move the mounting position of the rotation support shaft of the drum cutter to the movable support table. By using a cutting machine that is biased in the opposite directions with respect to the moving direction, it is possible to perform cutting in a wider range than the installation angle of the support member formed in an arch shape. The cutting operation for removing the inner wall surface consisting of lining concrete in a predetermined thickness, for example, can be to the position of the bottom board of the tunnel containing 踏前 portion of the tunnel is carried out in a single step.

  Further, an unloading device for unloading cutting waste generated by a cutting operation for removing the inner wall surface made of the existing lining concrete with a predetermined thickness is formed between the inner wall surface of the tunnel and the outer wall surface of the protector. By arranging it so that it can run in the work space, safety can be improved by completely separating the place where the cutting waste is carried out and the passage through which the vehicle passes.

It is sectional drawing of the tunnel which shows 1st Example of the reconstruction method of the lining part of the existing 2 lane road tunnel of this invention, (a) is a plane sectional view, (b) is a longitudinal cross-sectional view. It is a cross-sectional view of each part (AE) of FIG. It is sectional drawing of the tunnel which shows 2nd Example of the reconstruction method of the lining part of the existing 2 lane road tunnel of this invention, (a) is a plane sectional view, (b) is a longitudinal cross-sectional view. It is a cross-sectional view of each part (AD) of FIG.

  Hereinafter, an embodiment of a method for remodeling a lining part of an existing two-lane road tunnel according to the present invention will be described with reference to the drawings.

1 to 2 show a first embodiment of a method for remodeling a lining portion of an existing two-lane road tunnel according to the present invention.
The rehabilitation method of the lining part of this existing two-lane road tunnel is that a protector 2 that secures a one-lane passage that allows vehicles to pass along the length of the tunnel 1 in the existing two-lane road tunnel 1 An existing lining in the work space 3 formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2 while the protector 2 is moved intermittently in the length direction of the tunnel 1. A method of remodeling the lining part of an existing two-lane road tunnel that performs a cutting operation for removing the inner wall surface 10A made of concrete with a predetermined thickness and an inner wall surface building operation for constructing a new inner wall surface 10B. The cutting work consists of a cutting process using a cutting machine 4 provided with a drum cutter 41 having a number of bits on the peripheral surface, and the inner wall construction work consists of the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2. Between Repair and waterproof sheet construction process to be performed in the formed work space 3, and lining concrete placing process using the lining formwork 5 arranged to be movable with respect to the protector 2 in the work space 3; It is characterized by consisting of.

In this case, the protector 2 is, for example, a rectangle having a width of 4000 mm and a height of 4500 mm (including a shape in which the upper corner is chamfered) so as to ensure a one-lane passage that allows the vehicle to pass. It is formed in a box shape having an internal space.
The protector 2 travels on a rail 21 laid along the length direction of the tunnel 1 and can be moved intermittently in the length direction of the tunnel 1 by a moving device 22 such as a hydraulic jack. I have to.

Moreover, the cutting process using the cutting machine 4 provided with the drum cutter 41 which provided many bits in the surrounding surface which removes the inner wall surface 10A which consists of existing lining concrete by predetermined thickness, is 300-600 mm normally. Of existing lining concrete with a thickness of 2 mm, parts that require repair due to damage such as cracking, peeling, and floating of the concrete, which are relatively frequently generated on the surface of the tunnel in the sky, such as existing It is removed at a thickness of about 1/3 to 1/2 (100 to 300 mm) of the thickness of the lining concrete.
In addition, when repair is required over the whole existing lining concrete, the whole can also be removed and this is not excluded.

This cutting step is performed in the circumferential direction of the inner wall surface 10A of the tunnel disposed so as to be movable with respect to the protector 2 in the work space 3 formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2. There are provided two or more (three in the present embodiment) drum cutters 41 arranged on a support member 42 formed in an arch shape along with and a movable support base 43 movable along the support member 42. The cutting machine 4 and at least two of these drum cutters 41 (two in the present embodiment) move the mounting position of the rotating spindle of the drum cutter 41 relative to the movable support 43 to the movable support. The cutting machine 4 is provided so as to be biased in the opposite directions with respect to the moving direction of 43. In the present embodiment, one of the three drum cutters 41 located at the center has the attachment position of the rotation support shaft of the drum cutter 41 with respect to the movement support base 43 with respect to the movement direction of the movement support base 43. The cutting machine 4 provided without being biased is used.
Thereby, cutting can be performed in a substantially wider range than the installation angle of the support member 42 formed in an arch shape (movement angle of the movable support base 43), and the inner surface is made of existing lining concrete. The cutting operation for removing the wall surface with a predetermined thickness can be performed in a single process, for example, up to the position of the bottom surface of the tunnel 1 including the front part of the tunnel 1.
In order to stably install the support member 42 formed in an arch shape, an outrigger device 44 that contacts the inner wall surface of the tunnel 1 is attached to the support member 42.
Moreover, as a drive mechanism of the cutting machine 4, an electric motor or a hydraulic motor can be selectively used according to the peripheral equipment and the work environment.
In the present embodiment, the main body of the cutting machine 4 is disposed on the protector 2 and the entire cutting machine 4 is arranged so as to be movable with respect to the protector 2. Therefore, the main body of the cutting machine 4 can be arranged in the side space of the protector 2.

Further, as a carry-out device 7 for carrying out cutting waste generated by a cutting operation for removing the inner wall surface 10A made of existing lining concrete with a predetermined thickness, for example, a shafluder 71 or a cutting waste carrier 72 is used as the inner wall surface of the tunnel 1. And the outer wall surface of the protector 2 can be arranged so as to be able to travel in the work space 3 formed between them.
Thereby, the place where the cutting waste is carried out and the passage through which the vehicle passes can be completely separated, thereby improving the safety.
Further, if necessary, a dust collecting device 73 that sucks dust generated by the cutting operation may be disposed in the work space 3 formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2. it can.

  Of the inner wall surface construction work, the repair and waterproof sheet construction steps are formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2 by disposing the work carriage 82 so as to be movable around the outer periphery of the protector 2. A worker can freely install a waterproof sheet and a reinforcing bar in the work space 3.

Of the inner wall construction work, the lining concrete placing process is arranged to be movable with respect to the protector 2 in the work space 3 formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2. The inner wall surface 10B made of a new lining concrete having a thickness equivalent to the thickness of the existing lining concrete removed in the cutting process is constructed using the lining mold 5 thus prepared.
In this case, the concrete placement device such as the concrete pump 52 and the hardener supply device 53 for placing the lining concrete in the lining form 5 via the mixing nozzle 51 includes the inner wall surface of the tunnel 1 and the protector 2. It can arrange | position so that driving | running | working can be carried out in the work space 3 formed between the outer wall surfaces, or can be fixedly installed on the protector 2.
In this case, by using rapid hardening (early strength) concrete as the lining concrete to be placed, the tact time (time interval for moving the protector 2 intermittently in the length direction of the tunnel 1) is shortened, The construction period can be further shortened.
In addition, about concrete placement apparatuses, such as the mixing nozzle 51 in the case of using rapid hardening (early strength) concrete for the lining concrete to place, publicly known technique (for example, Unexamined-Japanese-Patent No. 8-135387, JP-A-8-135389, etc.) can be applied.

Moreover, in the work space 3 formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2, if necessary, a removal process of equipment such as a lighting device and a ventilator is performed before the cutting process. After the cutting process, as a tunnel deformation countermeasure process, for example, a lock bolt is driven using the hole drilling machine 6, or after the lining concrete placing process, restoration of equipment such as lighting equipment and ventilation equipment is performed. A process can be performed.
Among these, the removal process and the restoration process of the equipment are work formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2 by disposing work carriages 81 and 83 so as to be movable around the outer periphery of the protector 2. Workers can freely work in the space 3.
In the present embodiment, the hole drilling machine 6 is arranged on the protector 2, but it can also be arranged in the side space of the protector 2 in relation to the size of the upper space.

  As described above, according to the reconstruction method of the lining part of the existing two-lane road tunnel, the construction cost is low, the construction period is short, the tunnel cross-section R after the repair is not reduced, and the inside of the tunnel is being repaired. Can be secured (specifically, the interior space of the protector 2 can be used to allow ordinary vehicles to pass (one lane on one side), and the tunnel lining can be reconstructed under the live line. If there are two tunnels on the upper and lower lines, etc., use the other tunnels for general vehicles during the repair, stop the entire tunnel inside the tunnel being repaired, and The cutting work can be performed using the cutting machine 4 provided with the drum cutter 41 provided with a number of bits on the peripheral surface while exhibiting the advantage of using the internal space to allow the construction vehicle to pass. By Durability consisting of cast lining concrete and precast concrete panels constructed using the lining formwork 5 while preventing defects such as cracks from newly occurring in the remaining part of the inner wall of the existing tunnel It is possible to construct a new inner wall surface excellent in

3 to 4 show a second embodiment of a method for remodeling a lining portion of an existing two-lane road tunnel according to the present invention.
The rehabilitation method of the lining part of this existing two-lane road tunnel is that a protector 2 that secures a one-lane passage that allows vehicles to pass along the length of the tunnel 1 in the existing two-lane road tunnel 1 An existing lining in the work space 3 formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2 while the protector 2 is moved intermittently in the length direction of the tunnel 1. A method for renovating the lining part of an existing two-lane road tunnel, in which a cutting work for removing an inner wall surface made of concrete with a predetermined thickness and an inner wall surface construction work for constructing a new inner wall surface are performed, The work consists of a cutting process using a cutting machine 4 provided with a drum cutter 41 having a number of bits on the peripheral surface, and the inner wall construction work is performed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2. Formed in It consists of a repair and waterproof sheet construction process performed in the business space, and a precast concrete panel installation process (PCL process) using a precast concrete panel installation device (not shown) arranged behind the protector 2. .
Here, the renovation of the lining part can be performed on the inner wall surface 10A made of the existing lining concrete in the section that needs repair, and the section that does not need to be made of the existing lining concrete. The construction can be performed so that the inner wall surface 10A remains (the same applies to the method of remodeling the lining portion of the existing two-lane road tunnel of the first embodiment).

In this case, if the precast concrete panel installation device used in the precast concrete panel installation process is capable of installing the precast concrete panel 10C while allowing passage of the vehicle by securing a passage of one lane, The system is not particularly limited, and a known precast concrete panel installation device can be used as appropriate.
And, on the back side of the precast concrete panel 10C installed by the precast concrete panel installation device, using the back mortar filling machine 9, an inner wall surface 10A made of the precast concrete panel 10C and the existing lining concrete that has been cut, The mortar is filled with mortar.
And the restoration process of facilities, such as a lighting fixture and a ventilator, can be performed after that.

As described above, according to the reconstruction method of the lining part of the existing two-lane road tunnel, the construction cost is low, the construction period is short, the tunnel cross-section R after the repair is not reduced, and the inside of the tunnel is being repaired. The remaining part of the inner wall of the existing tunnel can be obtained by performing the cutting operation using the cutting machine 4 provided with the drum cutter 41 provided with a number of bits on the peripheral surface while exhibiting the advantage that the vehicle can be secured. Thus, a new inner wall surface made of the precast concrete panel 10C having excellent durability can be constructed while preventing any new defects such as cracks from occurring.
In addition, the other structure and effect | action of the renovation method of the lining part of this existing 2 lane road tunnel are the same as that of the renovation method of the lining part of the existing 2 lane road tunnel of the said 1st Example.

  As described above, the method for remodeling the lining part of the existing two-lane road tunnel according to the present invention has been described based on a plurality of examples. However, the present invention is not limited to the configuration described in the above examples, The configuration can be appropriately changed within a range not departing from the gist, such as appropriately combining the configurations described in the examples.

  The method of rebuilding the lining part of the existing two-lane road tunnel of the present invention is low in construction cost, has a short construction period, does not reduce the cross-section of the tunnel after repair, and allows the passage of vehicles in the tunnel even during repair. Because it has the property that it can construct a new inner wall surface with excellent durability while exhibiting the advantage of being able to be secured, it is suitable for use in the reconstruction of the lining part of the existing two-lane road tunnel be able to.

DESCRIPTION OF SYMBOLS 1 Tunnel 2 Protector 3 Work space 4 Cutting machine 41 Drum cutter 42 Support member 43 Moving support stand 44 Outrigger device 5 Covering formwork 51 Mixing nozzle 52 Concrete pump 53 Hardening material supply device 6 Drilling machine 7 Unloading device 71 Shaflower 72 Cutting Waste carrier 73 Dust collector 81, 82, 83 Work cart 9 Back-filling mortar filling machine 10A Tunnel inner wall (existing)
10B Tunnel inner wall (new)
10C precast concrete panel (new)

Claims (4)

  In the existing two-lane road tunnel, a protector that secures a one-lane passage that allows vehicles to pass is provided to be movable along the length of the tunnel, and the protector is moved intermittently along the length of the tunnel. Cutting work to remove the existing inner wall surface made of lining concrete with a predetermined thickness in the work space formed between the inner wall surface of the tunnel and the outer wall surface of the protector, and construct a new inner wall surface A method of remodeling the lining part of an existing two-lane road tunnel that performs an inner wall construction work, wherein the cutting work uses a cutting machine equipped with a drum cutter having a number of bits on the peripheral surface. And a repairing and waterproof sheet construction process in which the inner wall surface construction work is performed in a work space formed between the inner wall surface of the tunnel and the outer wall surface of the protector. Renovation method of lining portion of the existing two-lane road tunnels, characterized in that comprising a lining concreting process using a movable lining mold which is disposed with respect to data.   In the existing two-lane road tunnel, a protector that secures a one-lane passage that allows vehicles to pass is provided to be movable along the length of the tunnel, and the protector is moved intermittently along the length of the tunnel. Cutting work to remove the existing inner wall surface made of lining concrete with a predetermined thickness in the work space formed between the inner wall surface of the tunnel and the outer wall surface of the protector, and construct a new inner wall surface A method of remodeling the lining part of an existing two-lane road tunnel that performs an inner wall construction work, wherein the cutting work uses a cutting machine equipped with a drum cutter having a number of bits on the peripheral surface. It consists of a cutting process, and the inner wall construction work is performed in the work space formed between the inner wall surface of the tunnel and the outer wall surface of the protector, and the repair and waterproof sheet construction process and the rear of the protector. Existing two-lane road tunnels renovation methods lining portion, characterized in that it consists of a precast concrete panel installation process using a precast concrete panel installation apparatus.   The inner wall surface of the tunnel and the outer wall surface of the protector are formed by a cutting process using a cutting machine having a drum cutter provided with a number of bits on the peripheral surface, which removes the existing inner wall surface made of lining concrete with a predetermined thickness. A support member formed in an arch shape along the circumferential direction of the inner wall surface of the tunnel disposed so as to be movable with respect to the protector in the working space formed between the two and the movement movable along the support member A cutting machine having two or more drum cutters arranged on a support table, and at least two of the drum cutters move the mounting position of the rotation support shaft of the drum cutter to the moving support table. The cutting is performed in a range wider than the installation angle of the support member formed in an arch shape by using a cutting machine provided in a direction opposite to each other. Or 2 existing two-lane road tunnels renovation methods lining portion of the described.   A work space formed between the inner wall surface of the tunnel and the outer wall surface of the protector, with a carry-out device for carrying out cutting waste generated by the cutting work of removing the inner wall surface made of the existing lining concrete with a predetermined thickness. The method for remodeling a lining portion of an existing two-lane road tunnel according to claim 1, 2 or 3, wherein the lining portion is arranged so as to be able to travel inside.

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