JP3264459B2 - Tunnel lining construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel lining construction method suitable for application to a shield tunnel for an underground river.

[0002]

2. Description of the Related Art Conventionally, in a shield tunnel, a plurality of segments made of concrete or the like are connected along a tunnel circumferential direction and a tunnel axial direction in such a manner that earth pressure applied from an outer peripheral side thereof can be supported as an external pressure. There is a way to build a lining body depending on the situation. Recently, as a countermeasure against floods in urban areas, tunnels have been constructed in relatively deep underground by the shield method, and during heavy rainfall, rainwater that exceeds the drainage capacity of waterways such as rivers and drains will be collected. A concept has been proposed to prevent rainwater from overflowing onto the ground by treating wastewater using underground rivers. In such tunnels for underground rivers, when rainwater is circulated in the tunnel cross section, a large internal pressure is expected to be generated in the tunnel cross section due to a head difference or a water pressure due to an impact at the time of rainwater inflow. It is very strictly required that the lining body maintain the strength as a structural body and the water stopping property at all times for a long period of time.

[0003]

However, such a lining is formed by an external water pressure in such a manner that pore water in the ground supported by the lining acts as pressure external water on the outer peripheral side of the lining. Large stresses are concentrated on a portion of the lining, which can result in segment joint failures or cracks in the segments themselves, which can cause the lining to fail as previously described. There is a risk that such a structure may not be able to maintain such strength and water-stopping properties. Therefore, a backing material having a water stopping property is injected into the outer peripheral side of the lining body, or a waterproof sheet is drawn out along the outer circumference of the lining body with the propulsion of the shield device, and the like, so that the outer peripheral side of the lining body is A method has been considered in which a water-blocking layer is formed so as to cover the lining, thereby protecting the lining from external pressure water. But,
In the method of injecting the backing material, the reliability of whether the injected backing material covers the entire circumference of the lining body is poor,
In the method of extending the waterproof sheet, the waterproof sheet must be extended in such a manner as to pass between the tail seal of the shield device and the lining body, so that the structure of the shield device becomes very complicated and construction becomes difficult. There is a disadvantage. In addition, since the waterproof sheet is weak in tearing as a characteristic of the sheet member, even if a slight scratch is generated on the waterproof sheet, the waterproof sheet may be torn and broken due to the scratch. It is extremely difficult to locate and repair a rupture repair location at which position on the outer periphery of the waterproof sheet the rupture of the waterproof sheet has broken. Accordingly, the present invention has been made in view of the above circumstances, and has been made capable of forming a water-stopping layer in such a manner as to cover the entire periphery of the lining body simply and reliably without complicating the structure of the shield device. Another object of the present invention is to provide a method for constructing a tunnel lining in which the lining body can always maintain the strength and water-stopping properties of the structure for a long period of time.

[0004]

That is, according to the present invention, a waterproof coating layer (32) formed by applying a waterproof resin is provided on the outer periphery (31b) side, and along the edge on the outer periphery (31b) side. When a tunnel lining (3) is constructed by having a segment (31) provided with a sealing member mounting area (33) and connecting a plurality of the segments (31) along a tunnel circumferential direction and a tunnel axial direction. A sealing member (3) formed between the adjacent segments (31) and (31) so as to expand and contract in the segment adjacent direction.
5) is disposed along the joint direction of the adjacent segments (31) and (31) in such a manner as to be adhered to the seal member mounting area (33) of each segment (31) via an adhered surface. By doing so, the sealing member (35) and the waterproof coating layer (32) adjacent to the sealing member (35)
And the sealing member is connected to the adjacent segment.
A defective area is formed between the adherend surfaces adhered to the
The waterproof sealing layer (32) is formed on the outer periphery of the tunnel lining (3) by the connected sealing member (35) and the waterproof coating layer (32). The sealing member is formed in a continuous shape,
When it acts on, the defective area is spread,
So that the surface is pressed against both segment sides,
When an aperture is formed between the segments,
The seal member is attached to the segment side in an adhered state.
It is configured to expand and contract between surfaces to maintain a sealed state . 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. The same applies to the following operation columns.

[0005]

According to the above construction, the adjacent segment (3
1), (31) The seal member (35) arranged so as to be able to expand and contract in the direction adjacent to the segment between each other and the waterproof coating layer (32) provided on the outer periphery (31b) side of each segment (31) , Adjacent segments (31), (31)
The sealing member (35) and the waterproof coating layer (32) are connected via the connecting operation of (3), and the connected sealing member (3) is connected.
The tunnel lining (3) is formed in such a manner that the waterproof coating layer (5) and the waterproof coating layer (32) become a cylindrical waterproof layer (3P) continuous in the tunnel construction direction at the outer peripheral portion of the tunnel lining (3). It acts so as to stop water on the ground (2) arranged outside.

[0006]

1 is a cutaway perspective view showing an example of a tunnel being constructed using the present invention, FIG. 2 is a cross-sectional view of the tunnel shown in FIG. 1, and FIG. 3 is a lining portion of the tunnel shown in FIG. FIG. 4 is a view showing a joining method of the segments in the tunnel construction method according to the present invention, FIG. 5 is a view showing a state where the segments shown in FIG. 4 are joined, and FIG. It is a figure showing the state where opening occurred.

[0007] As shown in FIG. 1 or FIG. 2, the tunnels 1 under construction are arrows A, B which are digging directions in the ground 2.
The lining 3 has a lining 3 formed in a rollover cylindrical shape so as to extend in the direction, and the lining 3 is a digging tunnel formed into a tumbling cylindrical shape in the ground 2 by a shield device which is a digging means of the tunnel 1. In 2s, it is formed and constructed along the outer periphery of the excavation tunnel 2s, that is, in the form of a roll-over cylindrical shape connected to the downhole wall 2a shown in FIG. On an outer peripheral portion of the lining 3, an outer surface 31 of each of the concrete plates 31a of the plurality of segments 31 constituting the lining 3 is provided.
A waterproof layer 3P covering the entire area on the b side is
As shown in FIG. 2, the shield device is formed in a cylindrical shape continuously in the directions of arrows A and B, which are the tunnel construction directions, and on the arrow F direction side, which is the outer side of the water blocking layer 3P in the cross-sectional direction of the tunnel. A backing layer 3Q formed by injecting a backing material into the tail void portion is provided so as to fill and connect the lining 3 and the pit wall 2a of the ground 2 over the entire area.

Also, inside the lining 3 is a tunnel space 3s.
Is formed in a roll-over cylindrical shape corresponding to the shape of the inner peripheral surface 3a of the lining 3, and a shield device whose whole portion is not shown is provided at the left end of FIG. The ground excavation blade in the shield device is disposed so as to face the face of the ground 2, and the shield device uses the front end face of the segment ring 30 constituting the leading portion of the lining 3 as a propulsion reaction force. It is digging in the direction of arrow A. As shown in FIG. 1, the shield device has an erector 5 for embedding a segment 31 constituting the lining 3 at a predetermined position in a manner to follow the shield device. The erector 5 is provided so as to be connected to and supported by the girder portion of the shield device, and the segment gripping portion 5a of the erector 5 is rotatable around the tunnel axis CT0 as a rotation center along the arrow C and D directions which are circumferential directions of the tunnel. It is provided so as to be movable in the excavation direction, ie, the direction of arrows A and B, which is the axial direction of the tunnel, so as to protrude and retreat in the directions of arrows E and F which are the cross-sectional directions of the tunnel.

On the other hand, as shown in FIG. 1 or FIG. 2, the lining 3 has a plurality of annularly connected shapes arranged along the arrows C and D, which are circumferential directions of the tunnel. The segment ring 30 composed of the segments 31 is constructed following the shield device in such a manner that the ring width of one ring forms the width L1 and is successively connected in the arrows A and B directions in FIG. And each segment 31
Are formed in a block shape in which an arc is drawn along the lining shape of the tunnel 1. That is, the segment 31 corresponds to FIG.
As shown in the figure, a precast concrete plate 31a
The outer surface 31 b of the concrete slab 31 a on the arrow F side constitutes the outer peripheral surface of the segment 31. A waterproof resin is applied to the outer surface 31b of the concrete slab 31a which is the outer peripheral surface of the segment 31.
The coating layer 32 which is a waterproof coating layer obtained by factory-applying a predetermined thickness to b is applied to substantially the entire area on the outer peripheral side of the segment 31 (that is, the remaining area other than the formation of the below-mentioned waterproofing zone mounting portion 33). In all cases), the outer surface 31b is provided integrally with the concrete slab 31a so as to cover the outer surface 31b. At the same time, in the segment 31, a water stop zone mounting portion 33 which is a seal member mounting region is provided on the outer surface 31b side of the concrete slab 31a with one of the edges in the arrow A or B direction and the edge in the arrow C or D direction. Either one of the edges, that is, a portion along the edge on the outer surface 31b side of the concrete slab 31a, which is the outer peripheral side of the segment 31, conforms to the shape of the water blocking zone 35 which is a sealing member to be mounted here. The cutout is provided in the form of a cutout, and the cutoff zone mounting portion 33 is provided with a cutoff zone 35 in the form of a strip in the directions of arrows C and D or the directions of arrows A and B. In a form positioned between the segments 31 adjacent in the D direction, that is, along the joint direction of the segments 31, 31 and bonded to the watertight mounting part 33 via the adhesive 36, It is arranged in.

As shown in FIG. 4, the water blocking zone 35 is formed in a band shape extending in a direction crossing the plane of FIG. 4 is provided on the left and right sides of the water stop zone 35 in FIG.
5a and 35a are formed so as to extend in a band shape with the defective region 35s interposed therebetween. That is, the water stop zone 35 is made of the adhesive 3
6, between the adjacent segments 31, 31, the adhered surfaces 35 a, 35 a are integrated with each concrete plate 31 a of the portion constituting the watertight zone mounting portion 33 in the adjacent segments 31, 31. By being arranged here in the form of a strip extending along the direction of the segment joint in a form bonded to the concrete slab, it can be expanded and contracted in the segment adjacent direction without peeling off from the concrete slab 31a. Is what is being done. Before the water stop zone 35 is disposed between the adjacent segments 31 in the lining 3, the width L2 of the water stop zone mounting portion 33 of the segment 31, as shown in FIG. It is formed in a wider width L3, and the water stop zone 35 is formed.
Is, by the connection of the adjacent segments 31, 31,
It is configured such that the width L3 is reduced to a shape corresponding to the width L2 of the water stoppage mounting portion 33 in a shape that is crushed in the horizontal direction in FIG. Therefore, the waterproof layer 3P formed on the outer periphery of the lining 3
Is a plurality of segments 31 constituting the lining 3,
By connecting a plurality of pieces in the tunnel circumferential direction (directions of arrows C and D) and the tunnel axis direction (directions of arrows A and B), the water stop zone 35 disposed between the adjacent segments 31 and 31 and the water stop zone Coating layers 32, 3 adjacent to band 35
2 is continuously connected in the tunnel circumferential direction and the tunnel axial direction, and is formed in a cylindrical shape in the embodiment.

Further, as shown in FIG. 3 or 5, the lining 3 is provided with a waterproofing reinforcement by being arranged between the segments 31, 31 adjacent in the directions of arrows A and B and the directions of arrows C and D. The area 37 is formed by a concave groove 31c formed in the concrete slab 31a at the joint surface 31d of each segment 31 constituting the lining 3 by two segments 31, 31.
The seal 31 made of a water-swelling rubber or the like is provided in the water-stopping reinforcement area 37 with the segments 31, 31 via fastening bolts (not shown). By being fastened, the seal 6
5 is a concrete slab 31a, 31a of the concave groove 31c, 31c portion of which the side surface portion constitutes the waterproofing reinforcement region 37.
, And are provided in such a manner that they are sandwiched here. In the water stoppage reinforcing area 37, a small gap is left above and below the seal 6 sandwiched and arranged in FIG. 5, and further, a gap is formed between the seal 6 and the gap above and below in FIG. The fluid waterproof material 7 can be injected from the tunnel space 3s side inside the lining 3. Therefore,
The lining 3 is connected to the ground 2 from a connection point between the plurality of segments 31 constituting the lining 3 via the waterproof layer 3P formed so as to form an outer peripheral portion of the lining 3. The earth pressure, that is, the external pressure by the ground 2 can be supported through the backing layer Q without allowing the inside pore water to enter the tunnel space 3s in the lining 3 or the inner space of the shield device, that is, The plurality of segments 31 are integrally connected to each other in a form in which the lining 3 is water-stopped with respect to the ground 2, and a seal 6 is provided in each of the water-stopping reinforcement areas 37 to make the lining 3 watertight. It is arranged in a further raised form, and the flowable water-stopping material 7 can be injected into the water-stopping reinforcement area 37 so that it can be repaired in case of water leakage.

Since the tunnel 1 has the above-described configuration, the tunnel 1 is constructed by using a shield device, and in an initial stage of the construction, an appropriate temporary construction is provided at a shaft or the like which is a shield start point. The ground 2 is excavated through the ground excavation means of the shield device while seeking the reaction force from the reaction force base or the like, and is propelled into the ground 2. Then, the segment 31 is attached to the segment holding portion 5a via the erector 5 by an amount corresponding to the propulsion of the shield device.
The segment ring 30 having a width L1 is formed by being connected in a ring shape along the directions of arrows C and D which are circumferential directions of the tunnel in a form of gripping and moving the same to a predetermined erected position. The lining 3 is constructed by sequentially connecting the segment rings 30 in the directions of arrows A and B, which are the axial directions of the tunnel, and connecting and fixing the segment rings 30 to the ground 2 via the backing layer 3Q. That is, the lining 3 is built in the excavation tunnel 2 s formed by the shield device in such a manner that a plurality of the segments 31 are connected in the tunnel circumferential direction and the tunnel axial direction, so that the lining 3 is grounded by the lining 3. 2 to support the earth pressure by the segment rings 30 having the width L1. When the shield device has been propelled to some extent and the lining 3 has been constructed and extended to some extent, the shield device obtains a propulsion reaction force at the front end of the lining 3 via a plurality of propulsion jacks provided inside the lining. Then, while propelling the ground 2 by a distance L1 corresponding to the width of the segment ring 30, the segments 31 are sequentially built to construct a tunnel.

When a plurality of segments 31 are connected so as to be connected in the tunnel circumferential direction and the tunnel axial direction, as shown in FIG.
The watertight zone 35 is formed between the outer surface 31b of the concrete slab 31a so as to be able to expand and contract between the first and the 31st in the direction adjacent to the segment.
The coating layer 32 is already provided on the side of the watertight zone mounting portion 33 of the segment 31, and the segments 31 are arranged so as to adhere to the concrete slabs 31 a constituting the watertight zone mounting portion 33. . (In addition, the installation of the water stop zone 35
As shown in the figure, the operation is performed between the segments 31 adjacent to the directions of the arrows A and B and the arrows C and D. Therefore, as shown in FIG. 4, first, as shown in FIG.
An adhesive 36 is applied to a position corresponding to the water stoppage mounting portion 33 of the new segment 31 connected to 1d. On the other hand, a water stop zone 35 is bonded to the water stop zone mounting portion 33 of the newly built segment 31 via an adhesive 36. In this state, the newly erected segment 31 is gripped by the segment gripper 5a of the erector 5 and connected to the already erected segment 31 by pressing it in the direction of arrow G, for example, as shown in FIG. Let it. Then, the adjacent segments 31, 3 connected in this manner are connected.
1 between each other, as shown in FIG.
The adhesive is provided so as to extend along the joint direction of the segment shown in a direction intersecting the paper surface. At this time, before being disposed between the adjacent segments 31, 31,
As shown in FIG.
The water stop zone 35 formed in the width L3 which is wider than the width L2 of FIG. 3 is crushed in the left and right direction in FIG. 4 by the connection of the adjacent segments 31, 31, thereby, as shown in FIG. 5, the left and right side surfaces of the water stop zone 35, ie, the adhered surfaces 35a, 35a,
Each concrete slab 31 of adjacent segments 31, 31
a is integrally bonded and connected to the waterproof band mounting portion 33 that is configured. When the segment 31 is built in this manner, the seal 6 is fitted in the water-stopping reinforcing area 37, and the seal 6 is fitted in one of the concave grooves 31c of the adjacent segments 31, 31. Here, the segments 31, 31 are clamped and arranged by being crimped by the connection, and the adjacent segments 31, 31 are fastened and integrated by fastening bolts.

In this manner, while the shield device is being propelled, the segment 31 is moved by the propulsion amount, the watertight zone 35 is inserted between the adjacent segments 31, 31, and the watertight zone mounting portion 3 is mounted.
3 and are connected in the tunnel circumferential direction and the tunnel axial direction sequentially while sandwiching the seal 6 in the water-stopping reinforcing area 37, and the operation of adjoining is repeated. FIG. 5 shows a water stop zone 35 disposed between the segments 31 and 31 and a coating layer 32 provided on the outer surface 31b of the concrete slab 31a in each segment 31 and adjacent to the water stop zone 35. In this manner, the lining 3 is formed on the outer periphery of the lining 3 by the coating layer 32 and the water blocking zone 35 into a cylindrical shape continuous in the directions of the arrows A and B, which are the tunnel axis directions. In this manner, the shield device is constructed to follow the shield device by a shield propulsion distance. In addition, the seal 6 is provided in each of the waterproofing reinforcement areas 37 of the lining 3 so that the fluid waterproofing material 7 can be injected. Then, when a backing material 9 is injected into the tail void portion of the shield device, that is, between the lining 3 and the pit wall 2a of the ground 2 as shown in FIG. The lining 3 is connected to the pit wall 2 a of the ground 2 via the material 9, and the waterproofing layer 3 formed on the outer peripheral portion thereof is formed.
In a form in which waterproofness is secured to the ground 2 through P,
The construction is completed in an annular shape so as to support the earth pressure of the ground 2.

In the lining 3 constructed in this way, the waterproof layer 3P of the lining 3 formed as described above is applied to the outer surface 31b of the concrete slab 31a in advance by a factory-coated coating layer 32. Is formed by connecting the water-stop zone 35 bonded to the water-stop zone mounting portion 33 when the segment is built, so that the outer peripheral portion of the water-stop zone 35 is extremely reliable and of good quality. The shape is surrounded by the water layer 3P in an annular shape. That is, since the coating layer 32 is formed by applying a waterproof resin to the outer surface 31b of the precast concrete plate 31a whose quality is maintained at a predetermined standard,
The coating layer 32 reliably maintains a predetermined watertightness. Therefore, at the construction site, the connection of the respective coating layers 32 in the adjacent segments 31, 31 may be performed. For this purpose, the water-stop zone 35, which has been factory-processed in a belt shape so as to have a predetermined width L3 in advance, may be used. Is simply provided along the segment joint so that the water stop 35 can be expanded and contracted in the direction adjacent to the segment. The watertight zone 35 may be disposed between the adjacent segments 31, 31 so as to be bonded to the water zone mounting portion 33. And the width L3 of the water stop zone 35 is the width L2 of the water stop zone mounting portion 33.
From the wider area, the adhesive 36
Is applied to connect the rear segments 31, 31 to each other, so that the adjacent segments 3 can be easily connected.
Since the water stop zone 35 can be disposed between the first and the first 31 and the construction is simple, this can be surely performed.

During the construction of the tunnel 1 or after the completion of the construction, a local external pressure P acts on the lining 3 as shown in FIG. At this time, in the segment 31 constituting the lining 3, as shown in FIG. 6, the adjacent segments 31, 31 are separated from each other in the directions of arrows I and J, Apertures 39 may be formed between adjacent segments 31. At this time, the water blocking zone 35 constituting the water blocking layer 3P of the lining 3 is shown in FIG.
A defective region 35s is formed in a portion shown in the lower middle portion so as to be able to express elasticity in the segment adjacent direction, and the adhered surfaces 35a, 35a shown on the left and right sides of FIG. Adhesive 3 on concrete slab 31a
As shown in FIG. 6, the water stop zone 35 does not peel off the adhered surfaces 35a, 35a from the concrete slabs 31a, 31a. The water zone 35 is freely elastically deformed so as to extend in the left-right direction in FIG. 6, follows the displacement of the lining 3, and can keep the opening 39 sufficiently sealed. That is, the water stop zone 35
FIG. 6 shows that the water stop zone 35 itself is in the segment adjacent direction.
In addition to being able to elastically deform in the form of expanding and contracting in the left and right direction,
The water stop zone 35 has a defective area 35s at the lower center in FIG.
Is formed, by the action of the external pressure P,
The water stop zone 35 is elastically deformed smoothly so that the depressed portion 35b is formed in the upper surface portion in FIG. 6 while the defective region 35s is expanded as shown in FIG. At this time, the attachment surfaces 35a, 35a, which are the left and right side surfaces in FIG.
a, 31a, so that there is no danger that the water-stop zone 35 will be separated from any of the segments 31, 31. Extremely large ductility can be developed to follow a large lining deviation. In addition, with respect to such local deviation of the lining 3, the coating layer 32 of the segment 31 forming the waterproof layer 3P of the lining 3 is formed by the concrete plate 3 forming the segment 31.
Since the outer surface 31b of 1a is formed by applying a waterproof resin to the factory, the coating layer 32 tears and breaks like a sheet-like member used by another method other than this embodiment. It is possible to maintain a certain level of water stoppage without any danger.

Further, when the openings 39 are formed between the adjacent segments 31, 31 as shown in FIG. 6 and are not restored, the known seal 6, which has been conventionally used, is used in the present embodiment. Is simply each segment 3
The seal 6 is rarely drawn from the joint surfaces 31d of the adjacent segments 31, 31 because the watertight reinforcement area 37 is inserted and fitted in the concave groove 31c. 6 A space 37s is formed in the water-stopping reinforcement area 37 in a form in which the left and right sides are separated, and the sealing property is temporarily lost. At this time, since the fluid waterproofing material 7 can be injected into the waterproofing reinforcement area 37 of the lining 3, when such a situation occurs, the fluid waterproofing material 7 flows as shown in FIG. The water-blocking material 7 is injected into the water-stopping area 37, and the space 37 s formed in the water-stopping area 37 is filled and the openings 39 are closed via the flowable water-stopping material 7. In this way, the watertightness of the lining 3 can be easily restored. In the case of the lining 3, even in the event that water leakage occurs, the coating layer 32 is factory-coated on the outer peripheral side of the segment 31 and its reliability is maintained. The cause can be limited to the location where the above-mentioned openings 39 are generated. Therefore, even in the event of such a leak, the gap 37s of the water stop reinforcement area 37 is provided via the segment joint.
If the fluid waterproof material 7 is injected into the vicinity of the waterproofing zone mounting portion 33, the water leakage can be easily repaired and the lining 3 can be restored to a predetermined waterproofness.

Accordingly, the lining 3 formed in this manner has a water blocking zone 35 disposed between the adjacent segments 31 and 31 and a concrete plate 31a forming the outer circumference of each segment 31 on its outer peripheral portion. Is connected to the coating layer 32 provided on the outer surface 31b side, so that the water-stop layer 3P is formed in a cylindrical shape continuous in the tunnel construction direction.
1 to cover the entire outer periphery of each concrete slab 31a, thereby exhibiting and maintaining reliable water stoppage over the entire area.
That is, the entire lining 3 is stopped against the ground 2. The water-stopping layer 3P can maintain a reliable water-stopping property for a long period of time without a risk of being damaged and tearing and breaking. Further, the coating layer 3 forming the water blocking layer 3P
2 has high reliability because this is factory processing,
On the other hand, the water stop zone 35 is configured to expand and contract freely in the direction adjacent to the segment so that it can be freely elastically deformed with respect to the deviation of the lining 3. Is locally displaced with respect to the ground 2, the water stopping layer 3 P is elastically deformed without destruction or transmission of stress in a manner following this, and the water stopping performance is reliably maintained for a long period of time. You can keep it. That is, even when the lining 3 of the tunnel 1 is subject to local deviation, the lining 3 always has a water-stop layer 3P formed on the outer periphery thereof in a cylindrical shape continuous in the tunnel construction direction. 3, the lining 3 is formed over the entire outer peripheral portion.
In order to maintain the water stopping property for a long period of time, a water path is formed in the ground 2 supported by the lining 3, and pore water in the ground 2 is out of pressure through the water path. Even when the water acts on the outer peripheral surface of the lining, the water-stopping layer 3P can appropriately stop the water. Therefore, even if the stress caused by the water path is concentrated on the lining 3 due to the pressure outside water in the ground 2,
Without cracks being formed in each segment 31 etc.
The destruction can be suitably prevented.

Therefore, the tunnel 1 is constructed as an underground river in which rainwater can flow from a river other than the tunnel 1 or another drainage channel such as a drainage with a head difference, and the tunnel space 3s is formed. However, when rainwater that cannot be processed by other rivers other than the tunnel 1 is circulated, a large internal pressure is generated in the tunnel cross-section due to the water difference due to the water difference or the impact due to the impact at the time of rainwater inflow. At this time, the lining 3 has a high water-stopping property at the outer peripheral portion thereof through the water-stopping layer 3P, thereby preventing the lining 3 from being damaged by the external pressure and having a sufficiently cured structure. From the state where the high strength is maintained, the adjacent segments 31, due to the tensile force acting on the lining 3 along the circumferential direction of the tunnel due to the internal pressure, In the form of joint portions between 1 fastening state of the segment bolt ruptures not resist to the cited tension,
The danger that a part of the lining 3 is destroyed, resulting in water leakage, is avoided. That is, by using the tunnel 1 as such an emergency underground river and treating rainwater through the tunnel space 3s, the tunnel 1
It is possible to appropriately prevent urban flooding by preventing rainwater from overflowing to the ground from other rivers or drainage channels such as drains.

In the above-described embodiment, as a means for arranging the water stop zone 35 between the adjacent segments 31, 31, the water stop zone mounting portion 33 in the already built segment 31 is used. While the adhesive 36 is applied to the concrete slab 31a of the portion that has been set, the watertight zone 35 is bonded to the watertight zone mounting portion 33 of the newly built segment 31 with the adhesive 36 interposed therebetween. Although the example in which the watertight zone 35 is bonded to the watertight zone mounting portion 33 through the operation of connecting the new segment 31 to the existing segment 31 has been described, in the present invention, a shape capable of expanding and contracting in the segment adjacent direction. A water-stop zone 35, which is a seal member formed in a strip shape in the above, is bonded to the water-stop zone mounting portion 33 between the adjacent segments 31, 31 at a connection portion of the adjacent segment 31. By disposing Te, connect the coating layer 32 is a waterproof coating layer adjacent thereto and 該止 water zone 35, 該止 water zone 35 and the coating layer 3
It is sufficient that the water stop layer 3P can be formed in a cylindrical shape continuous in the tunnel axis direction by the method 2. Therefore, the construction procedure and the details of the components are not limited to those described in the embodiment. No problem. Therefore, the form of the water-stop zone mounting portion 33 and the water-stop zone 35 is arbitrary. Further, in the embodiment, the shape and configuration of the waterproofing area 37 provided between the adjacent segments 31 of the lining 3 and the seal 6 and the fluid waterproofing material 7 provided in the waterproofing area 37 are arbitrary. It is.

[0021]

As described above, according to the present invention, a waterproof coating layer such as a coating layer 32 formed by applying a waterproof resin is provided on the outer peripheral side such as the outer surface 31b. A lining is provided by providing a segment 31 provided with a sealing member mounting area such as a water stop zone mounting portion 33 along an outer peripheral edge, and connecting a plurality of the segments 31 along a tunnel circumferential direction and a tunnel axial direction. When constructing a tunnel lining such as 3, a sealing member such as a water-stop zone 35 formed in a belt-like shape that can expand and contract in the segment-adjacent direction between adjacent segments 31, 31. the seal member mounting region, by arranging along the joint direction of the segments 31, 31 contact該隣in the form of adhesive through respective deposition surface, the adjacent to the sealing member and the sealing member Connect the aqueous coating layer, wherein the seal member
The adhering state to the adjacent segment
A defective region is formed between the adhered surfaces, and a cylindrical water-stop layer 3P is formed in the outer periphery of the tunnel lining in the tunnel construction direction by the connected sealing member and the waterproof coating layer. External pressure acts on the seal member.
When used, the deficient area expands,
To be pressed against both segment sides, and
If openings are formed between the segments,
The seal member is between the segment side and the adhered surface
The seal member is configured to extend and contract to maintain the sealed state . Therefore, a seal member is provided between the adjacent segments 31 and 31 so as to be able to expand and contract in the segment adjacent direction and provided on the outer peripheral side of each segment 31. The sealing member and the waterproof coating layer are connected to each other through the connecting operation of the adjacent segments, and the sealing member and the waterproof coating layer in the connected state are in the tunnel construction direction at the outer peripheral portion of the tunnel lining. In the form of a cylindrical waterproof layer 3P
The tunnel lining can be stopped against the ground 2 arranged outside the tunnel lining. Thus, according to the present invention,
The segments 31 are connected in the tunnel circumferential direction and the tunnel axial direction by using a segment 31 provided with a waterproof coating layer formed by applying a waterproof resin in a form capable of exhibiting a predetermined waterproof property by factory processing on the outer peripheral side in advance. By constructing the tunnel lining by performing the above, simultaneously with the segment connecting operation, the sealing member along the joint direction of the adjacent segments 31, 31 is simply attached with the sealing member between the adjacent segments 31, 31. The sealing member and the waterproof coating layer are disposed here in a form adhered to the region, and the waterproof layer 3P can be easily formed to form the waterproof layer 3P.
This can be done reliably because the construction is simple. In order to form the water blocking layer 3P on the outer peripheral portion of the lining 3 in this manner, this operation is performed simultaneously with the segment connecting operation through an operation of connecting a plurality of segments 31 in the tunnel circumferential direction and the tunnel axial direction. Since it is possible, it is not necessary to complicate the structure of the shield device such as the erector 5 for erection of the segment 31, and the waterproof layer 3P can be formed with high construction efficiency. Further, as described above, the water-stopping layer 3P thus formed by application is formed into a waterproof coating layer capable of ensuring a predetermined tear strength by being factory-processed, and a sealing member capable of expanding and contracting in the segment adjacent direction. Are connected to each other, so that the water blocking layer 3P having high reliability and high quality is formed in a cylindrical shape in a continuous shape in the tunnel construction direction. That is, the waterproof coating layer provided on the outer peripheral side of the segment 31 and the sealing member are in a state of maintaining a predetermined waterproofness in advance by being factory-processed, and the predetermined waterproofness is maintained. The connection between the waterproof coating layer and the sealing member in the state is simple and reliable as described above. Further, the seal member is formed in a band shape so that it can expand and contract in the segment adjacent direction, and is bonded to the seal member mounting area of each segment 31, and the joint direction of the adjacent segments 31, 31 is formed. The sealing member of the segment 31 is used even when an opening is formed between the adjacent segments 31 due to the local deviation of the lining 3 because it is used along the Without peeling from the mounting area, the sealing member follows the deviation in a form that expands and contracts in the segment adjacent direction, that is, without releasing the connection state with the waterproof coating layer adjacent to the sealing member. The openings can be reliably sealed.
In addition, the segments on both sides move evenly in the horizontal direction.
Even when opening with
The seal is maintained by expanding and contracting between the adhered surfaces.
Therefore, a gap is formed between the seal member and the segment.
The sealing state is maintained accurately. Therefore, the water blocking layer 3P formed by the connection between the sealing member and the waterproof coating layer is always maintained in a form capable of exhibiting high quality water blocking. Therefore, according to the present invention, it is possible to simply and reliably cover the outer peripheral portion of the tunnel lining, that is, the outer peripheral side of the lining body, without complicating the structure of the shield device. Can be formed continuously in the tunnel construction direction, and the lining body thus formed can always maintain the strength and water-stopping properties of the structure for a long period of time. It becomes possible. Therefore, if a tunnel lining is constructed according to the present invention, the waterproofness is ensured for a long period of time and the structural strength is high so that cracks are not formed even when subjected to external pressure water due to the waterproofness. It is possible to construct a tunnel lining body in a state where is maintained, so that a tunnel is constructed at a relatively deep underground in an urban area using the present invention, and drainage of waterways such as rivers and drains during heavy rain. If the rainwater in excess of the capacity is used to prevent rainwater from overflowing to the ground by drainage treatment using the tunnel as an underground river, the lining body has a strength as a structure, Since rainwater is circulated through the tunnel cross-section because the water-stopping property is constantly maintained for a long period of time, it occurs in the tunnel cross-section due to the head difference or the water pressure due to the impact at the time of rainwater inflow. Doo is endured without also destroying the large internal pressure expected,
It can be useful for avoiding floods in urban areas.
Also, when external pressure acts on the sealing member,
Pressed by both segment sides, the seal member and
The contact pressure between the segments increases, resulting in a strong seal.
You can conduct.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view showing an example of a tunnel being constructed using the present invention.

FIG. 2 is a cross-sectional view of the tunnel shown in FIG.

FIG. 3 is an enlarged perspective view of a lining body portion in the tunnel shown in FIG. 1;

FIG. 4 is a diagram showing a segment joining method in the tunnel construction method according to the present invention.

FIG. 5 is a diagram showing a state where the segments shown in FIG. 4 are joined.

FIG. 6 is a diagram showing a state in which a mesh is formed in the segment shown in FIG. 5;

[Explanation of symbols]

 2 ... ground 3 ... tunnel lining (lining) 3P ... water blocking layer 31 ... segment 31b ... outer periphery (outer surface) 32 ... waterproof coating (coating layer) 33 ... seal member mounting area (stop) Water belt mounting part) 35 Seal member (water-stop zone)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-U 3-86197 (JP, U) JP-B 54-42739 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 11/08 E21D 11/10 E21D 11/38

Claims (1)

(57) [Claims] 1. On the outer peripheral side,Do not apply waterproof resin
ToAlong with providing the waterproof coating layer, along the outer peripheral edge
A segment provided with a seal member mounting area, wherein the segment is arranged in a tunnel circumferential direction and a tunnel axial direction.
Build tunnel lining by connecting multiple along
When extending between adjacent segments,
A band-shaped seal member that can be contracted is attached to each segment.
In the area where the seal member is mountedThrough the adherend, it
EachAdhering along the joint direction of the adjacent segment
The seal member and the seal portion
Connecting the waterproof coating layer adjacent to the material,The seal member contacts the adjacent segment.
A defective region is formed between the adhered surfaces in the attached state.
And  By the connected seal member and the waterproof coating layer, the
Tunnel construction with a tubular water-stop layer on the outer periphery of the tunnel lining
To be formed in a continuous shape in the direction,When external pressure acts on the sealing member, the defective area
Is spread, and the adherend surface is pressed against the segment sides on both sides.
And the openings between the segments
When formed, the sealing member is
The seal is maintained by expanding and contracting between the adhesive and the adhered surface
Was configured to Tunnel lining construction method.