KR101216391B1 - Segment structure of shield tunnel making use of a prestressed steel wire and segment lining method fixing the segment therewith - Google Patents

Abstract

The present invention provides a fastening structure and further increases the rigidity while fixing the wire in a line instead of a point fixation so that the joint of the segment ring assembly of the shield tunnel does not open during the integral operation of the shield tunnel. Its purpose is to make it simple and easy to assemble and to make efficient rehabilitation, and to make the material less economical.
The longitudinal joint (JL) of the segment ring assembly is fixed and tightly fixed by prestressed steel wire and the circular arc (JC) of the segment by a turnbuckle to increase rigidity, and is reinforced in the rigid reinforcement groove and the turnbuckle groove. It is a constitution in which the rigidity is further added and connected to each other.
Since the longitudinal junction JL of the segment ring assembly 20 is fixed in a long line by the prestressed steel wire, the behavior of the shield tunnel is integrated without opening the longitudinal junction JL of the segment ring assembly. It is an invention having a useful effect that not only is maintained but also the behavior of the shield tunnel further strengthened by stiffening by connecting and reinforcing the turnbuckle and the main reinforcing bar.

Description

Segment structure of shield tunnel making use of a prestressed steel wire and segment lining method fixing the segment therewith}

The present invention relates to a shield tunnel segment structure using prestressed steel wire and a shield tunnel segment lining method using the same.

More specifically, it is a joining structure in which rigidity is further increased while being fixed by a line rather than point fixation so that the joint of the segment ring assembly of the shield tunnel does not open during the integral operation of the shield tunnel.

Since the longitudinal junction (JL) of the segment ring assembly is fixed and tightly secured by prestressed steel wire and the arc (JC) in the arc direction of the segment by a turnbuckle, the rigidity is firmly fixed and tight by the fastening bolt. Compared to the technology, the fixed structure is simpler, so it is easy to assemble, efficient in perforation work, and material is saved.

In addition, since the mortar injected by the protective cover die is prevented from falling in the direction of gravity, the structure of the injected mortar becomes dense, thereby making the structure of the segment ring assembly stable and beautiful in appearance. The structure is stable and economical, so it is expected to be widely applied in the silt tunnel field.

The shield method is an excavation method that uses a shield having a cross section slightly larger than the tunnel outline section to excavate while preventing the collapse of the tip ground and establish a vent hole that supports the excavated section at the rear portion of the shield. Perforations are assembled by segments.

The shield tunnel is a continuum structure that is perforated by a segment ring.

The shield propeller is advanced by the reaction wall of the continuum of the segment ring pre-installed by the propulsion jack therein, and by using the segment selector in the shield propeller, the segment ring is placed at the front end of the continuum. Assemble while connecting.

The shield method is the most efficient and stable method for constructing tunnel structures on soft ground rather than rock.

Segment rings generally consist of five to eight segments (pieces).

Since the segment ring is a structure that receives earth pressure and water pressure from the outer periphery, high strength and high exponential performance are required.

The joint between the segments, which is an assembly of the segment rings, is firmly fastened by fastening bolts.

The joint between the segment ring assembly and the segment ring assembly is also firmly fastened by fastening bolts.

Segment fastening bolts use high tensile bolts, and the bolt box should be embedded in expensive steel formwork or bolt holes formed in the steel formwork.The number of bolted fastenings is 3-4 in the longitudinal direction of the tunnel and 2-3 in the transverse direction of the tunnel. The dog is installed.

In general, at least 25, 30, 35 and 40 pieces of fastening bolts are used for 5, 6, 7 and 8 pieces per ring. This number accounts for 10-30% of the segment manufacturing cost, which is an uneconomical problem.

Where the fastening bolt is fastened is the joint of the segment and the joint of the segment ring assembly.

The joining portion is formed with a metal fastening portion for fastening the fastening bolts.

The joint is the most vulnerable to leakage because most of the shield tunnel segment leaks occur at the joint even if a water expansion index or gasket is installed at the joint of the segment and the joint of the segment ring assembly.

Also, since the shield tunnel is fixed by the fastening bolts of the segment ring assembly and the entire shield tunnel behaves as one, it is only a point fixation of the joint by the fastening bolts. Opening of the joint causes leakage.

In addition, even if the fastening bolts and fastening parts are electroplated to prevent rust, if the fastening bolts and the fastening parts are damaged or corrosion progresses over time, the segments and the segment ring assemblies may be structurally unstable while damaging the segments. There is a problem.

On the other hand, since the number of fastening bolts per ring (segment) is large, it takes a lot of work time to assemble and construct one by one, there is a problem that the rehabilitation work is inefficient and inefficient.

In order to describe this in more detail, the present invention will be described with reference to Publication No. 10-2004-0026598 as a prior art.

As shown in Fig. 2, a plurality of bolt boxes 12 provided at both ends 11a and 11a in the arc direction of the concrete segment (segment) 11, which is one of the civil engineering structures used for the restoration of the shield tunnel, and the like; And a joint 14 embedded corresponding to one or both of the plurality of bolt boxes 13 provided at both ends 11b and 11b in the axial direction (the axial direction of the tunnel to be closed).

When the joint 14 is embedded at the end portion 11a in the arc direction of the segment 11, as shown in FIG. 1, the inner surface of the segment 11 at the end portion 11a of the segment 11. The joint head 18 is positioned between the bottomed bolt box 12 having an opening on the side 11c and the joining surface 11d of the segment 11, and at the same time, each anchor column 19, 19 The bolt box 12 is positioned on both sides (up and down in FIG. 1), and the front face 15b of the bolt insertion part 15 is aligned with the joint face 11d of the segment 11. The rear end surface 15c of the bolt insertion portion 15 is exposed in the bolt box 12 and embedded in the segment 11.

When the adjacent segments 11 and 11 are joined by such a joint structure 14, adjacent segments are joined similarly to the case where the conventional segments S and S are joined as shown in FIG. The joint surfaces 11d and 11d of the 11 and 11 are brought into contact with each other, and the front end surfaces 15b and 15b of the bolt insertion portions 15 and 15 at the joints 14 and 14 are respectively bolted to each other. 15a, 15a)

In contact with the center, the bolt 22 is inserted into the bolt holes 15a and 15a through the bolt box 12 from the opening 12a of the bolt box 12, and the bolt ( The joints (14, 14) are coupled to each other by screwing and tightening the nut (23) to 22).

As described above, since the plurality of bolt boxes 12 and the plurality of axial bolt boxes 13 in the arc direction shown in FIG. 2 are fastened and fixed by the fastening bolts, a large number of fastening bolts are required. It is inefficient and inefficient.

The object of the present invention is to have a bonding structure in which the rigidity is further increased while fixing with a long wire so that the joint of the segment ring assembly of the shield tunnel does not open when the shield tunnel is integrated.

The fastening structure of the joint is simple, so the assembly and construction work is easy, and the rehabilitation work is efficient, and the material is reduced and economical.

By installing protective cover dies in the steel wire fixing grooves, the rigid reinforcing grooves, and the turnbuckle grooves, the structure of the injected mortar becomes dense and the structure of the segment ring assembly 20 is stabilized while preventing the injected mortar from falling in the direction of gravity. Another purpose is to beautify the appearance while making it beautiful.

The structure of the shield tunnel segment structure using the prestressed steel wire of the present invention is as follows.

In the segment structure of the shield tunnel

The liner fixing groove 23 and the rigid reinforcing groove 23b are formed in the longitudinal direction of the segment 22, and the turnbuckle groove 24 is formed in the arc direction of the segment 22. In the center, and the rigid reinforcing groove (23b) is installed in the open state at both ends in the longitudinal direction, the reinforcing reinforcement groove (23b) is the main reinforcing bar (26) is arranged to the outside, the steel wire anchoring groove 23 and both ends of the rigid reinforcement The steel wire hole 23a is drilled between the grooves 23b, and the turnbuckle steel bar 42 and the main reinforcing bar 26 are disposed in the open turnbuckle groove 24 in the open state, while the steel wire fixing groove 23 and The shield tunnel segment structure using the prestressed steel wire is characterized in that the fixing hole 25 for fixing the protective cover formwork 50 is formed on the rigid reinforcement groove 23b and the main surface of the turnbuckle groove 24. .

Segment ring assembly 20 is made by segment 22.

The longitudinal steel wire anchoring groove 23 of the segment 22 is associated with the three segment ring assemblies 20 by the steel wire 30.

As shown in Fig. 6A, two steel wires 30 in opposite directions are fixed to P and Q points of one segment 22 longitudinal steel wire fixing groove 23.

The segment 22 to be connected to the steel wire 30 at the point P is the segment ring assembly 20-3 to be assembled in the future, and the segment 22 connected to the steel wire 30 at the Q point is the pre-assembled segment ring assembly 20-. 1).

The segment 22 where the points P and Q are located is the segment ring assembly 20-2 currently assembled.

For convenience of explanation, 20-1, 20-2, and 20-3 are added.

First, the process of fixing the steel wire 30 at Q point will be described.

The steel wire 30 settled at the point Q passes through the segment 22 steel wire hole 23a of the pre-assembled segment ring assembly 20-1 so that the steel line hole of the segment 22 of the segment ring assembly 20-2 ( It is the steel wire 30 which penetrated 23a). This steel wire 30 passes through the segment 22 steel wire hole 23a of the segment ring assembly 20-2 via the segment 22 steel wire fixing groove 23 of the segment ring assembly 20-2. It is hooked to the upper fixed end 64 of the propulsion jack 62 of the shield propeller 60. In the process of passing the steel wire 30 through the segment 22 steel wire fixing groove 23 of the segment ring assembly 20-2, the amcon 32 must be inserted into the steel wire 30.

The steel wire 30 is caught by the upper fixed end 64 of the propulsion jack 62 of the shield propeller 60 in the state in which the arm cone 32 is inserted into the steel wire 30.

In this state, when the rod 66 of the propulsion jack 62 is extended as shown in FIG. 9, a tensile force is introduced into the steel wire 30.

At this time, the male cone 34 is fixed to the steel wire 30 at the Q position of the female cone 32 of the segment 22 steel wire fixing groove 23 of the segment ring assembly 20-2, and when placed therein, the male wire 34 is introduced into the steel wire 30. The male cone 34 is firmly fixed to the female cone 32 by the tension. The reaction wall of the propulsion jack 62 becomes a pre-assembled segment ring assembly 20-1. When the rod 66 of the propulsion jack 62 is contracted, the male cone 32 is inserted into the steel wire 30 to which no tensile force is introduced, and at the same time, the male cone 34 is fixed to the end of the steel wire 30 at P point. This inserts the steel wire 30 starting at point P into the segment 22 steel wire hole 23a of the segment ring assembly 20-3 to be assembled in the future, thereby connecting the steel wire 30 to the segment ring assembly 20 in the above manner. In order to fix in the segment 22 steel wire fixing groove 23 of -2).

The point P and Q of the steel wire fixing groove 23 is a place where the prestressed steel wire 30 is fixed by the female cone 32 and the male cone 34. In particular, since the wall contacted with the flange of the amcon 32 is a place where the prestress is continuously applied, a supporting plate (not shown) capable of supporting the amcon 32 flange is buried in the wall of the point P and Q at the time of segment manufacture. It is also preferable to.

Next, the turnbuckle groove 24 and the rigid reinforcement groove 23b will be described.

As shown in Fig. 4, the turnbuckle groove is provided in an open state at both ends of the arc 22 in the arc direction.

7A and 7B show a half turnbuckle groove 24 of an adjacent segment S1 and a half turnbuckle groove 24 of a segment S2 in an open state to meet an intact turnbuckle groove 24. It is a sectional view.

The turnbuckle steel bar 42 is welded to the main steel bar 26 of the segment S1, and the turnbuckle steel bar 42 is welded to the main steel bar 26 of the segment S2. The turnbuckle 40 is formed by two turnbuckle steel bars 42.

Rigid reinforcing groove (23b) is an open groove provided at both ends on the longitudinal extension line of the steel wire fixing groove (23).

Rigid reinforcement similar to the half turnbuckle groove 24 of the adjacent segment S1 and the half turnbuckle groove 24 of the segment S2 open to each other to form an intact turnbuckle groove 24. The groove 23b meets the segment ring assembly 20 and the segment ring assembly 20 in an open state to form an intact rigid reinforcing groove 23b.

The rigid reinforcing groove 23b, the turnbuckle groove 24, and the steel wire fixing groove 23 are all connected to each other in the rigid reinforcing groove 23b or the turnbuckle groove 24 from both sides. . The state in which the main reinforcing bar 26 is connected is the same as that shown in FIGS. 8A and 8B.

In this way, the main reinforcing bars 26 are connected to each other and the mortar 27 is injected into it, as shown in FIG. The mortar 27 injection is also the same.

In addition, since the steel wire 30 is installed in the rigid reinforcing groove 23b, and the turnbuckle steel bar 42 is installed in the turnbuckle groove 24, the rigidity is increased accordingly.

Next, the close contact structure of the joint will be described.

Tensile force is introduced into the steel wire 30 for the close contact of the longitudinal joints JL of the segment ring assembly 20. Since the introduction of the tensile force is given by the propulsion jack 62 of the shield propeller 60, a separate means according to the tensile force introduction is not necessary. At this time, the reaction wall is a pre-assembled segment ring assembly 20.

Tighten with turnbuckle 40 for close contact of the arcuate joint JC of the segment 22.

Since the joints are fixed and tightly connected by the steel wire 30 and the turnbuckle 40, the structure is simpler than the conventional fastening bolts, and thus the assembling work is simple and easy. Do.

Next, the rigidity of the junction part is demonstrated.

Since the longitudinal junction JL of the segment ring assembly 20 is fixed in line by the prestressed steel wire 30, the longitudinal tunnel JL of the segment ring assembly 20 is not opened. The behavior of is maintained integrally. On the contrary, in the prior art, since the junction part is fixed to the point by the fastening bolt, the longitudinal junction part JL of the segment ring assembly 20 is opened so that integration behavior is difficult and structurally unstable.

In addition, the circular joint JC of the segment 22 is tightly connected by the turnbuckle 40, and the main reinforcing bar 26 is disposed in the rigid reinforcing groove 23b and the turnbuckle groove 24. Since it is hardened by injecting and curing the mortar 27, as described above, the rigidity of the shield tunnel is further increased.

The protective cover formwork 50 will now be described.

When the steel wire anchoring groove 23, the rigid reinforcing groove 23b, and the turnbuckle groove 24 are located at the top of the segment ring assembly 20, the injected mortar 27 falls in the direction of gravity.

In order to prevent the mortar 27 from falling in the direction of gravity, the protective cover formwork 50 is formed by the steel anchor fixing grooves 23, the rigid reinforcing grooves 23b, and the plastic anchors 57 and the screws 58. Secure in turnbuckle groove (24). The plastic anchors 57 and the screws 58 are inserted into the fixing holes 25 of the segments 22.

The mortar inlet 54 and the air outlet 56 are formed in the protective cover formwork 50.

The mortar injection hole 54 is connected to the steel wire fixing groove 23, the rigid reinforcing groove 23b, and the main reinforcing bar 26 inside the turnbuckle groove 24, and the protective cover formwork 50 is fixed. Inject mortar 27 through. When pressure is applied when the mortar 27 is injected, the structure of the mortar 27 in the steel wire fixing groove 23, the rigid reinforcing groove 23b, and the turnbuckle groove 24 is further densified. The silicon 52 is attached to the segment 22 which is in contact with the protective cover formwork 50. The air outlet 56 facilitates injection of the mortar 27 by discharging the air when the mortar 27 is injected.

Since the longitudinal junction JL of the segment ring assembly 20 is fixed in line by the prestressed steel wire 30, the longitudinal tunnel JL of the segment ring assembly 20 is not opened. There is an effect that the behavior of is maintained integrally.

In addition, the arc (JC) in the arc direction of the segment 22 is tightly connected by the turnbuckle 40, and the main reinforcing bar 23b and the turnbuckle groove 24 are arranged in the state where the main reinforcing bar 26 is mortar ( 27) It is hardened by injecting and hardening, so the integration behavior of the shield tunnel is assured.

The structure of fixing and tightly joining the joint by the steel wire 30 and the turnbuckle 40, the structure is simpler than the conventional fastening bolt, the assembly operation is simple and easy, and the material is saved, as well as the close and secure Do.

Since the protective cover formwork 50 is installed in the steel wire fixing groove 23, the rigid reinforcing groove 23b, and the turnbuckle groove 24, the injected mortar 27 is not only prevented from falling in the direction of gravity. The tissue becomes dense so that the structure of the segment ring assembly 20 is stable and beautiful in appearance.

Since it is easy and simple to assemble, it is a useful invention having the effect of performing the ventilating work of the tunnel in a short time without the need for many working people.

1 is a cross-sectional view showing a segment joint structure of the prior art
FIG. 2 is a perspective view of a segment to which the segment joint structure of FIG. 1 is applied
3 is a perspective view of a shield tunnel assembled from a segment of the present invention;
4 is a perspective view of a segment of the present invention.
5 is a cross-sectional view of AA of FIG.
6A is an enlarged cross-sectional view of “A” in which the steel wire of FIG. 3 is fixed.
6B is an exploded perspective view of FIG. 6A;
6C is a cross-sectional state diagram in which mortar is injected into FIG. 6A
7A is an enlarged cross-sectional view of “B” in which the turnbuckle of FIG. 5 is installed.
FIG. 7B is an exploded perspective view of FIG. 7A
FIG. 8A is a cross-sectional view illustrating a connection state of cast iron reinforcement in the rigid reinforcement groove of FIG. 3. FIG.
FIG. 8B is an exploded perspective view of FIG. 8A
9 is a cross-sectional view of a shield propeller showing a state in which tension is applied to the steel wire by a propulsion jack;

The shield tunnel segment lining fastening method using the prestressed steel wire and the segment structure of the present invention will be described in detail with reference to the accompanying drawings.

강 forming the liner fixing groove 23 and the rigid reinforcing groove 23b in the longitudinal direction of the segment 22 and the turnbuckle groove 24 in the arc direction of the segment 22, wherein the liner fixing groove 23 is in the longitudinal direction In the center of the, and the rigid reinforcing groove (23b) is installed at both ends in the longitudinal direction between the steel wire fixing groove (23) and the rigid reinforcing groove (23b) of both ends are drilled, the turnbuckle steel bar 42 Manufacturing a segment at the factory so as to be installed at both ends of the turnbuckle groove 24;

세그먼트 forming a segment ring assembly 20-1 from the factory manufactured segments;

Insert one end of the steel wire 30 to the steel wire fixing groove 23 in the steel wire hole (23a) of each segment of the segment ring assembly 20-1 formed in the step (⒞) and then the amcon (32) in the steel wire (30) The end of each segment of the segment ring assembly 20-2 to be re-formed while the other end of the steel wire 30 is fixed by the female cones 34 and the male cones 34 by fixing their ends with the male cones 34. Steel wire hole (23a) → steel wire fixing groove (23) → the steel wire hole (23a) is inserted into the passage of the steel wire fixing groove 23 when inserting the amcon (32) to be fixed in the steel wire fixing groove (23) and then the steel wire (30) ) And the rod of the propulsion jack (62) with the segment ring assembly (20-1) as a reaction wall in the state of the upper end of the propulsion jack (62) of the shield propeller (60). Expanding 66) to introduce tensile force into steel wire 30;

The male cone 34 is fixed to the steel wire 30 at a position where the cone ring 32 is engaged with the female cone 32 of the steel wire fixing groove 23 of the segment ring assembly 20-2, and the rod 66 of the propulsion jack 62 is fixed. Unscrewing and fixing the steel wire 30 to which the tensile force is introduced into the steel wire fixing groove 23 of the segment ring assembly 20-2 by the arm cone 32 and the male cone 34;

강 Cut the steel wire 30 of the portion where the tensile force is not introduced in the steel wire fixing groove 23 of step ⒟ and inserts the amcon 32 into the cutting steel wire 30 and then the male cone 34 to the cutting steel wire 30. Fixing the;

In order to assemble the segment ring assembly 20-3, the steel wire 30 from the segment ring assembly 20-2 is moved to the steel wire hole 23a → the steel wire fixing groove of each segment of the segment ring assembly 20-3. 23) is inserted into the steel wire hole (23a), but when the passage of the steel wire fixing groove 23 is inserted into the arm cone 32 to be fixed in the steel wire fixing groove 23, and then the other end of the steel wire 30 of the shield propeller 60 It hangs on the upper fixed end 64 of the propulsion jack 62, and in that state, the rod 66 of the propulsion jack 62 is extended to the steel wire 30 with the segment ring assembly 20-1 as a reaction wall. Introducing a tensile force;

Introducing a tensile force into the longitudinal steel wire 30 of the even-numbered segment ring assemblies 20-2, 20-4, and 20-6 while repeating steps iii through v;

⒣ meanwhile, tightening the turnbuckle steel bar 42 to the turnbuckle groove 24 of the segment ring assembly 20 into which the tension force is introduced to firmly fix the arc joint JC in the prestressed steel wire. It is a method of fastening the shield tunnel segment lining by using and segment structure.

In addition, after step 다음, the following steps are added.

주 protection of the mortar inlet 54 and the air outlet 56 formed by connecting the main reinforcing bars to the longitudinal steel settling groove 23 and the steel settling groove 23 and the turnbuckle groove 24 in the arc direction. Covered with the cover formwork 50, the protective cover formwork 50 and the position where the segment is in contact with the seal with silicon (52) and fixed using a plastic anchor (57) and screws (58) and mortar through the mortar inlet (54) Injecting 27;

몰 removing the protective cover formwork 50 by removing the plastic anchor (57) and the screw (58) after the mortar (27) of step 경화; shield using the prestressed steel wire and segment structure Tunnel segment lining fastening method.

The method of fastening the shield tunnel segment lining of the present invention is to increase the rigidity while fixing the longitudinal direction (axial direction) and the arc direction of the segment by prestressed steel wire and turnbuckle, and by connecting and reinforcement of the reinforcing bar. It is possible to construct structurally stable shield tunnel because of its reliable behavior.

10; Shield Tunnel
20; Segment ring assembly
22; Segment
23; Liner anchorage, 23a; Liner holes, 23b; Rigid Reinforcement Home
24; Turnbuckle home
25; Fixed hole
26; Cast iron
27; Mortar
30; Liner
32; Amcon, 34; Male corn
40; Turnbuckle
42; Turnbuckle Steel Bars
50; Protective cover formwork
52; Silicon, 54; Mortar inlet, 56; Air outlet
57; Plastic anchors
58; Screw
60; Shield Propeller
62; Propulsion jack, 64; Fixed end, 66; road
JL; Longitudinal junction
JC; Circular arc joint

Claims (3)

In the segment structure of the shield tunnel

The liner fixing groove 23 and the rigid reinforcing groove 23b are formed in the longitudinal direction of the segment 22, and the turnbuckle groove 24 is formed in the arc direction of the segment 22. In the center, and the rigid reinforcing groove (23b) is installed in the open state at both ends in the longitudinal direction, the reinforcing reinforcement groove (23b) is the main reinforcing bar (26) is arranged to the outside, the steel wire anchoring groove 23 and both ends of the rigid reinforcement The steel wire hole 23a is drilled between the grooves 23b, and the turnbuckle steel bar 42 and the main reinforcing bar 26 are disposed in the open turnbuckle groove 24, while the steel wire fixing groove 23 is disposed outside. Shield tunnel segment structure using prestressed steel wire, characterized in that the fixing hole 25 for fixing the protective cover formwork 50 is formed on the rigid reinforcement groove 23b and the main surface of the turnbuckle groove 24.
강 forming the liner fixing groove 23 and the rigid reinforcing groove 23b in the longitudinal direction of the segment 22 and the turnbuckle groove 24 in the arc direction of the segment 22, wherein the liner fixing groove 23 is in the longitudinal direction In the center of the, and the rigid reinforcing groove (23b) is installed at both ends in the longitudinal direction between the steel wire fixing groove (23) and the rigid reinforcing groove (23b) of both ends are drilled, the turnbuckle steel bar 42 Manufacturing a segment at the factory so as to be installed at both ends of the turnbuckle groove 24;

세그먼트 forming a segment ring assembly 20-1 from the factory manufactured segments;

Insert one end of the steel wire 30 to the steel wire fixing groove 23 in the steel wire hole (23a) of each segment of the segment ring assembly 20-1 formed in the step (⒞) and then the amcon (32) in the steel wire (30) The end of each segment of the segment ring assembly 20-2 to be re-formed while the other end of the steel wire 30 is fixed by the female cones 34 and the male cones 34 by fixing their ends with the male cones 34. Steel wire hole (23a) → steel wire fixing groove (23) → the steel wire hole (23a) is inserted into the passage of the steel wire fixing groove 23 when inserting the amcon (32) to be fixed in the steel wire fixing groove (23) and then the steel wire (30) ) And the rod of the propulsion jack (62) with the segment ring assembly (20-1) as a reaction wall in the state of the upper end of the propulsion jack (62) of the shield propeller (60). Expanding 66) to introduce tensile force into steel wire 30;

The male cone 34 is fixed to the steel wire 30 at a position where the cone ring 32 is engaged with the female cone 32 of the steel wire fixing groove 23 of the segment ring assembly 20-2, and the rod 66 of the propulsion jack 62 is fixed. Unscrewing and fixing the steel wire 30 to which the tensile force is introduced into the steel wire fixing groove 23 of the segment ring assembly 20-2 by the arm cone 32 and the male cone 34;

강 Cut the steel wire 30 of the portion where the tensile force is not introduced in the steel wire fixing groove 23 of step ⒟ and inserts the amcon 32 into the cutting steel wire 30 and then the male cone 34 to the cutting steel wire 30. Fixing the;

In order to assemble the segment ring assembly 20-3, the steel wire 30 from the segment ring assembly 20-2 is moved to the steel wire hole 23a → the steel wire fixing groove of each segment of the segment ring assembly 20-3. 23) is inserted into the steel wire hole (23a), but when the passage of the steel wire fixing groove 23 is inserted into the arm cone 32 to be fixed in the steel wire fixing groove 23, and then the other end of the steel wire 30 of the shield propeller 60 It hangs on the upper fixed end 64 of the propulsion jack 62, and in that state, the rod 66 of the propulsion jack 62 is extended to the steel wire 30 with the segment ring assembly 20-1 as a reaction wall. Introducing a tensile force;

Introducing a tensile force into the longitudinal steel wire 30 of the even-numbered segment ring assemblies 20-2, 20-4, and 20-6 while repeating steps iii through v;

⒣ meanwhile, tightening the turnbuckle steel bar 42 to the turnbuckle groove 24 of the segment ring assembly 20 into which the tension force is introduced to firmly fix the arc joint JC in the prestressed steel wire. Method of fastening shield tunnel segment lining
The method according to claim 2, wherein

⒣ After step ⒣, the main steel bars are connected to the longitudinal steel wire fixing groove 23 and the steel wire fixing groove 23 and the turnbuckle groove 24 in the arc direction, and then the mortar inlet 54 and the air outlet 56 ) Is covered with a protective cover formwork 50 formed in the protective cover formwork 50 and the position where the segment is in contact with the seal with silicon (52) and fixed using a plastic anchor (57) and screws (58) and then mortar injection hole (54) Injecting mortar (27) through;

몰 removing the protective cover formwork 50 by removing the plastic anchor (57) and the screw (58) after the mortar (27) of step 경화; shield using the prestressed steel wire and segment structure Tunnel Segment Lining

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