JP2005240535A - Shield widening tunneling method and widening linable shield machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield widening tunneling method and a shield machine being capable of widening and constructing a tunnel at a low cost and in a free sectional shape by using the general shield machine, being capable of being formed in a structure having a high safety and also having an excellent workability. <P>SOLUTION: A side-section cutter 5 is extended and projected from the inside of the shield machine to the outer-peripheral side of the drum section 3 of the shield machine. A natural ground is slit-cut by the side-section cutter while excavating and advancing the shield machine, and a lining by a solidifying material such as concrete and a lining material is constructed to slits by the cutting. Thus, a continuous wall for a widening projected from a shield tunnel to the outer-peripheral side of the shield tunnel by the shield machine is built. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a technique for constructing a shield tunnel in which the cross-sectional shape is partially changed by widening the lining, and in particular, while constructing a shield tunnel with a shield machine, a widening lining can be simultaneously constructed on the outer periphery thereof. The present invention relates to a shield widening method and a shield machine capable of widening lining.

  In some places where the cross-sectional shape of the tunnel changes partially, such as in a junction part of a road tunnel or a station part of a subway tunnel, an open-cut method is generally used. However, in the case of a large depth or when there is a large buried object or an overground structure in the upper part, it is necessary to perform the construction by the non-cutting method.

  As a non-open cutting method, for example, when connecting two shield tunnels in parallel with a widening lining, the joint location of the two shield tunnels 101 and 102 is ground improvement 103 from the ground as shown in FIG. As shown in FIG. 2, the ground improvement 104 is carried out from the inside of the tunnel by a chemical injection method, a freezing method, or the like, or as a prior construction from the inside of the tunnel, as shown in FIG. As shown in the figure, a curved boring method using a pipe 106 or the like was applied to stabilize the natural ground, and then the tunnel was widened to construct a widening lining.

  However, in such a conventional construction method, especially when the widened section is long, the range of ground improvement and prior construction increases, and the cost increases. In addition, since the ground improvement process and the first receiving process are performed after the shield excavation, there is a problem that the entire construction period becomes longer.

On the other hand, Patent Document 1 (Japanese Patent Application Laid-Open No. 2001-329781) discloses the following construction method in which the widened portion of the shield tunnel can be performed simultaneously with the shield excavation.
A telescopic cutter is provided at the front end of the shield excavator separately from the main cutter, and an overhanging portion for expanding the cross-sectional shape is provided at a part of the outer periphery of the skin plate so as to be able to enter and exit. In order to construct the widening range, the telescopic cutter is protruded and the ground is loosened by cutting the widening range in advance with the excavation of the shield excavator, or the ground holding material is discharged from the skin plate and replaced. A part of the shield excavator is expanded by projecting the projecting part to the side, and a widening range is excavated in this expanded state, and an enlarged segment is assembled and sequentially connected in the projecting part. After constructing the widening range, retract the retractable cutter and overhang to reduce the diameter, and continue the tunnel excavation of the normal diameter with a shield excavator.

However, this has the following problems.
(1) Since a special shield excavator provided with an overhanging portion in a part of the outer periphery of the skin plate is provided, the structure of the shield excavator becomes complicated and expensive.
(2) The widening lining by the segment according to the shield shape cannot be made into a wide widening lining shape, and since the segment has a heavy structure, the structural stability is poor.
(3) Since a wide range including the widening range by the overhanging portion has to be cut in advance with an extendable cutter, it is difficult to control the attitude of the shield excavator and the workability is poor.
JP 2001-329781 A

  An object of the present invention is to provide a shield widening method and a shield tunneling machine that can be widened to a free and inexpensive cross-sectional shape using a general shield tunneling machine, can have a highly stable structure, and have good workability. There is to do.

  In the shield widening method of the present invention, a side cutting machine is extended from the inside of the shield machine to the outer peripheral side of the trunk part, and the ground machine is slit-cut with this side machine while the shield machine is advanced. By constructing a lining in the slit made by the cutting, a continuous wall for widening projecting from the shield tunnel by the shield machine to the outer peripheral side is constructed.

  The lining of the slit may be performed by filling the slit with a solidifying material such as concrete or by inserting a lining member into the slit.

  When filling with a solidifying material, the solidifying material is pumped from the shield machine to the slit by the solidifying material pumping mechanism. Even if the solidified material feeding mechanism is moved integrally with the side cutting machine and the solidified material is pumped to the slit behind the side cutting machine, the pressure feeding mechanism separates the solidified material feeding mechanism from the side cutting machine. The solidified material may be pumped to the slit independently of the side cutting machine.

  When inserting a lining member into a slit, it is good to assemble many lining members by inserting into a slit from the inside of a shield machine or a shield tunnel. In that case, a reaction force is applied to the assembled lining member to propel the side cutting machine. Moreover, before inserting a lining member into a slit, it is good to fill the slit with a filler for temporarily holding a natural ground.

  Even if the side cutting machine can be expanded and contracted inward and outward from a cutting machine storage part provided in the shield machine, it can extend from the projecting part of the shield machine and project.

  The cutting earth and sand by the side cutting machine is taken into the shield machine by the earth and sand taking-in mechanism at the rear side of the side cutting machine.

  The earth and sand taking-in mechanism can be provided on the rear side of the side cutting machine and moved together with the side cutting machine.

  After constructing the upper and lower widening continuous walls with the construction of the preceding shield tunnel, construct the subsequent shield tunnel along the upper and lower widening continuous walls, or for the upper and lower widening with the construction of the subsequent shield tunnel Construct a continuous wall along the preceding shield tunnel, and connect the preceding shield tunnel and the trailing shield tunnel between the upper and lower widening continuous walls, or connect the upper and lower widening continuous walls in parallel with two shield tunnels If two shield tunnels are constructed between one or both of the above and the upper and lower widening continuous walls are joined together, two parallel shield tunnels in which the parallel preceding shield tunnel and the subsequent shield tunnel are joined at the widened portion Can be constructed.

  If the continuous wall for widening is continuously constructed on the side of the shield tunnel so as to form a tunnel structure itself, the widened portion of the shield tunnel can be constructed inside the continuous wall for widening that forms the tunnel structure.

  A shield machine according to a first aspect of the present invention is the above-described method, wherein the lining of the slit is performed by filling the slit with a solidifying material such as concrete, and the body of the shield machine A side cutting machine that projects from the outer periphery to the outer periphery and slits the ground ground on the side as the shield machine is excavated, and a sand and sand taking-in mechanism that takes the sand and sand from the cut into the shield machine and a slit It comprises a solidifying material pumping mechanism for pumping a solidifying material such as concrete from the inside of the shield machine to the slit by cutting.

  The shield machine according to the second aspect of the present invention is the above method, wherein the lining of the slit is performed by inserting a lining member into the slit, and the shield machine is removed from the trunk of the shield machine. A side cutting machine that extends to the outer peripheral side and protrudes and slits the ground on the side as the shield machine is excavated; And a lining member insertion mechanism for inserting a lining member from within the shield machine.

The present invention has the following effects.
(1) Widening construction can be performed at low cost from a shield tunnel by using a shield shield machine that incorporates an inexpensive side cutting machine, a sediment take-in mechanism, and a solidified material feed mechanism into a general shield machine.
(2) Since the continuous wall for widening can be made into a free cross-sectional shape, a widened portion having a free cross-sectional shape can be constructed not only on the side part of the shield tunnel but also on the lower part and the upper part.
(3) The widened portion can have a stable and rational structure.
(4) In order to construct a continuous wall for widening at the same time by slitting the tunnel side part with a side cutting machine and pumping the solidified material into the slit or inserting a lining material as the shield machine advances. Workability is good and does not loosen natural ground.
(5) Since the pre-construction can be constructed in advance of the widened portion of the side tunnel, it is possible to prevent the influence on the environment such as subsidence that occurs when cutting and expanding.
(6) When a high-strength material such as a steel material is used as the lining material for the slit, it can be used as the lining material for the tunnel body, which is economical.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  5, 6 and 7 show the outline of the shield machine used in the present invention. This shield machine 1 has a well-known basic structure as a shield machine capable of constructing a single-circular shield tunnel 2, in addition to a cutting machine storage part 4 to a trunk part 3 provided in a trunk part (skin plate) 3. The side cutting machine 5 that can be extended and protruded to the outer peripheral side of is attached to be extendable and retractable. The side cutting machine 5 can also add a plurality of units in the length direction as shown in FIG. The cutting machine storage part 4 is formed by a partition wall 4 a in the shield machine 1.

  When the main cutter 6 on the front surface of the shield machine 1 is rotated to excavate (drill) the natural ground in a circular shape, the side cutting machine 5 brought into the protruding state is driven, and the side cutting machine 5 3 is simultaneously slit-cut (cut into a slit shape) behind the main cutter 6. The earth and sand resulting from the cutting is once taken into the cutting machine storage part 4 by a later-described earth and sand taking-in mechanism attached to the side cutting machine 5 and then conveyed to the outside of the shield machine 1 together with the earth and sand by the main cutter 6.

  When a solidified material such as concrete is pumped into the slit formed by the cutting of the side cutting machine 5 from within the shield machine 1 as will be described later, the side portion of the shield tunnel 2 as shown in FIG. A continuous wall 7 for widening extending from is constructed. The continuous wall 7 for widening is integrated with the segment of the shield tunnel 2 by a reinforcing bar 8 as shown in FIG. 5A, or the segment is provided with a notch as shown in FIG. In addition to the integration of the backfill material 11, the backfill material 11, which is stronger than the backfill material 10 on the outer periphery of the shield tunnel 2, is firmly integrated with the shield tunnel 2.

  Since the cross-sectional shape of the widening continuous wall 7 depends on the shape of the side cutting machine 5 in the length direction, the cross-sectional shape of the widening continuous wall 7 if the side cutting machine 5 is arcuate as shown in FIG. Is also arcuate as shown in FIG.

  10, 11, 12, and 13 show different specific examples of the side cutting machine 5 together with the earth and sand taking-in mechanism and the solidifying material pumping mechanism.

  In the example of FIG. 10, the side cutting machine 5 is a chain cutter system, and a chain cutter 12 protruding from the inside of the cutting machine storage part 4 to the outside of the body part (skin plate) 3 is circulated to form a natural ground. Cut the slit in the face direction. On the rear side of the chain cutter 12, there is provided a jacket 13 that expands and contracts in the inner and outer directions of the cutting machine storage portion 4 integrally therewith, and from the mud feed pipe 14 extending to the tip of the jacket 13, the tip of the chain cutter 12 is provided. The mud soil entering the cutting machine storage unit 4 is discharged by the mud discharge pipe 15 while the mud is fed toward the front of the portion (outer end portion), thereby taking in the cut soil. At the same time, the shield excavator 1 is advanced by feeding a solidified material such as concrete backward from the solidified material feed pipe 16 extending to the middle portion of the jacket 13 and filling the slit with a solidified material by cutting. Accordingly, the widening continuous wall 7 is constructed.

  The example of FIG. 11 is a roller cutter system in which the side cutting machine 5 is rotated in the horizontal direction, and a plurality of in-line roller cutters 17 are simultaneously rotated in the horizontal direction by the chain 18 to slit the ground. The construction of the continuous wall 7 for widening by taking in the cut earth and sand by mud feeding / draining mud and by solidifying material pumping is the same as in the case of FIG.

  The example of FIG. 12 is a roller cutter system in which the side cutting machine 5 is rotated in the vertical direction, and a plurality of in-line roller cutters 19 are simultaneously rotated in the vertical direction on the same axis 20 to slit cut natural ground. The construction of the continuous wall 7 for widening by taking in the cut earth and sand by mud feeding / draining mud and by solidifying material pumping is the same as in the case of FIG.

  In the example of FIG. 12, the side cutting machine 5 is an auger type, and a plurality of augers 21 arranged in parallel are simultaneously rotated by a simultaneous rotation unit 22 to slit a ground. The construction of the continuous wall 7 for widening by taking in the cut earth and sand by mud feeding / draining mud and by solidifying material pumping is the same as in the case of FIG.

  In the examples of FIGS. 10, 11, 12, and 13, the solidification material feed pipe 16 is installed in the jacket 13 and moved inward and outward of the side portion of the shield machine 1 together with the side cutting machine 5. However, as shown in FIG. 14, the solidification material feed pipe 16 may be separated from the side cutting machine 5 so that it can be independently moved in and out of the side of the shield machine 1. .

  15, 16, and 17 show different examples of the stretching operation of the side cutting machine 5 and the construction procedure of the widening continuous wall 7, and in each of the drawings, in order of (A), (B), and (C) Indicates that the process changes.

  In the example of FIG. 15, while the shield machine 1 is stopped, the side cutting machine 5 is projected to the outside of the side of the shield machine 1 while excavating the ground, and the shield machine 1 is left in the projected state. As described above, the side cutting machine 5 continuously feeds the solidified material such as concrete while slit cutting in the face direction with the side cutting machine 5 and continuously constructs the widening wall 7 to the end, and then the side cutting machine. 5 is stored in the cutting machine storage section 4.

  In the example of FIG. 16, while the shield machine 1 is stopped, the side cutting machine 5 is projected to the outside of the side of the shield machine 1 while excavating the ground, and the shield machine 1 is kept in the projected state. As described above, solidified material such as concrete is pumped while slit cutting in the face direction with the side cutting machine 5 as described above, and the continuous wall 7 for widening is constructed continuously in the required section. Thereafter, the side cutting machine 5 is temporarily stored in the cutting machine storage section 4, and the remaining continuous wall 7a is constructed by repeating the excavation of the shield machine 1 and the cutting by the expansion and contraction of the side cutting machine 5 and the solidification material pumping. .

  In the example of FIG. 17, the side cutting machine 5 is projected to the outside of the side of the shield machine 1 while excavating the ground while the shield machine 1 is stopped, and then moved forward of the side machine 5. A solidified material such as concrete is pumped toward the building, and a continuous wall for widening is partially constructed. After that, the widening continuous wall 7 is constructed by repeatedly storing the side cutting machine 5, digging the shield machine 1, cutting with the side cutting machine 5, and pumping solidified material such as concrete.

Next, a construction example of the widening work to which the present invention is applied will be described.
18 to 20 show a case where the space between the preceding shield tunnel and the succeeding shield tunnel is widened. As shown in FIG. 18, the shield machine 1 is dug to construct the preceding shield tunnel 2A. Vertically symmetrical continuous walls 7A and 7B which are vertically symmetrical by a side-cutting machine (not shown in the figure) mounted on the top and bottom of the excavator 1 and a soil taking-in mechanism and a solidifying material pumping mechanism attached thereto. Build at the same time.

  Then, as shown in FIG. 19, after constructing the trailing shield tunnel 2B by excavating the shield machine 1 between the upper and lower widening continuous walls 7A and 7B along these, as shown in FIG. The segment of the cut and widened portion of both shield tunnels 2A and 2B is removed, and the upper and lower linings 23A and 23B and the intermediate wall 24 are constructed between the upper and lower widening continuous walls 7A and 7B. The shield tunnels 2A and 2B are coupled.

  In the construction example of FIG. 21, when the separation between the two shield tunnels 2A and 2B in parallel is large, the upper and lower widening continuous walls 7A and 7B are constructed for each of the shield tunnels 2A and 2B, and the widening from both is performed. The upper and lower linings 23A and 23B, intermediate wall 24, etc. are constructed between the upper and lower widening continuous walls, and the two shield tunnels 2A and 2B are joined. It is.

  In the construction example of FIG. 22, the widening continuous wall 7 is continuously constructed on the side of the widening continuous wall 7 so as to form a tunnel structure. This is a case where the widening lining portion 25 is constructed. FIG. 23 shows a case where it is provided below the shield tunnel 2.

  In the above embodiment, the widening continuous wall is constructed by filling the slit cut by the side cutting machine with a solidifying material such as concrete. Next, an embodiment in which the lining material is inserted and constructed will be described.

  As shown in FIGS. 24 and 25, an arch-shaped side cutting machine 27 having a cutter 26 on the front surface is extended from the body of the shield machine 1 so as to protrude sideways, and the shield machine 1 is dug. While the shield lining 29 by the segment 28 is being constructed, the natural ground is slit into an arch shape by the side cutting machine 27, and the lining material 31 such as a concrete precast material, a steel pipe, a steel square pipe, or the like is inserted into the slit 30. Are sequentially inserted from the shield machine 1 and assembled, and an arch-shaped continuous wall 32 for widening by the lining material 31 is constructed. As shown in FIG. 26 (A), the side cutting machine 27 uses the propulsion jack 33 inside thereof to propel the lining material 31 that has been assembled by reaction force. At that time, as shown by a broken line in FIG. 26 (B), an insertion space for the covering material 31 sent out from the shield machine 1 is secured in the side cutting machine 27 and sent to this insertion space. The lining material 31 is pushed out in the slit 30 by the propulsion jack 33. Reference numeral 34 denotes a tail seal that seals between the side cutting machine 27 and the lining material 31.

  The example shown in FIGS. 27 and 28 is basically the same as the example shown in FIGS. 24 and 25, but temporarily holding the ground until the lining material 31 is inserted into the cut slit 30. Therefore, after filling the slit 30 with a filler 35 such as gelled muddy water in advance, the lining material 31 is inserted.

  In the example shown in FIGS. 29 and 30, the lining material 31 is not inserted from the shield machine 1, but is inserted into the slit 30 from the constructed shield lining 29.

  In the example shown in FIG. 31, the upward arched side cutting machine 27A is extended from the overhanging portion 36 provided in the preceding shield machine 1A toward the subsequent shield machine 1B, and the upper slit 37A is arched. While cutting into a shape, the downward side cutting machine 27B is extended from the trunk of the preceding shield machine 1A toward the subsequent shield machine 1B, and the lower slit 37B is cut. Then, temporary shield linings 38A and 38B are constructed by the shield machines 1A and 1B, and a lining material is inserted into the upper slit 37A so that an arch-shaped upper widening is provided above both shield linings 38A and 38B. A continuous wall 39A is constructed, and similarly, a covering material is inserted into the lower slit 37B, and a lower widening continuous wall 39B is constructed on the lower side between the shield coverings 38A and 38B. Thereafter, the temporary shield linings 38A and 38B are removed, and the large-section tunnel 40 including these regions is completed.

  In the example shown in FIG. 32, the projecting portions 36A and 36B are provided in each of the two shield machines 1A and 1B, and the upward arcuate side cutting machine 27A is passed between them. The downward side cutting machine 27B is passed between the lower parts of the machines 1A and 1B, and the shield machine 1A and 1B and the side cutting machines 27A and 27B are dug simultaneously. Then, the temporary shield linings 38A and 38B by the shield machine 1A and 1B are constructed, and at the same time, the arch-shaped upper widening continuous wall 39A and the lower widening continuous wall 39B are constructed. Thereafter, the temporary shield linings 38A and 38B are removed, and the large-section tunnel 40 including these regions is completed.

  In the example shown in FIG. 33, left and right projecting portions 41A and 41B that can be stored in the shield machine 1 are provided, and left and right side cutting machines 42A and 42B are extended downward from these projecting portions 41A and 41B to form left and right slits 43A and 41B. 43B is cut and a lining material is inserted into these slits 43A and 43B to construct the left and right widening continuous walls 44A and 44B. And after excavating between these and making the ground improvement 45 in the lower part, the shield covering 46 by the shield machine 1 is removed, and the large-section tunnel 47 including the area | region is completed.

  As mentioned above, although the Example of this invention was described, the cross-sectional shape of a shield tunnel or the continuous wall for widening is not restricted to the above forms.

It is sectional drawing in the case of performing ground improvement from the ground by the conventional construction method by non-cutting. It is sectional drawing of the prior art example which improves ground by the chemical | medical solution injection | pouring method, the freezing method, etc. similarly from the inside of a tunnel. It is sectional drawing of the prior art example similarly constructed from the inside of a tunnel as a prior art girder. It is sectional drawing of the prior art example which constructs the pipe etc. which become a receiving work similarly by a curved boring method. It is a perspective view which shows the outline | summary of the shield machine used by this invention. FIG. It is a schematic diagram showing that the side part cutting machine expands and contracts in that direction, (A) is an accommodation state, (B) is a protrusion state. It is a schematic diagram which shows that the side part cutting machine can be added. It is sectional drawing which shows the construction example of this invention, (A) is the case where the continuous wall for widening and the segment of the shield tunnel are integrated with a reinforcing bar, etc. This is the case. It is a figure which shows a side part cutting machine as a chain cutter system with an earth and sand taking-in mechanism and a solidification material pumping mechanism, (A) is a horizontal simplified sectional view, (B) is a simplified vertical sectional view. It is the same figure made into the roller cutter system which rotates a side part cutting machine to a horizontal direction. It is the same figure made into the roller cutter system which rotates a side part cutting machine to a perpendicular direction. It is the same figure which made the side part cutting machine an auger system. It is a simplified sectional view of the horizontal direction which separated the solidification material feed pipe from the side part cutting machine. It is a figure which shows the expansion-contraction operation | movement of a side part cutting machine, and the construction procedure of the continuous wall for widening in order of the process of (A), (B), (C). It is a figure which shows the example from which it differs similarly. It is a figure which shows another example similarly. The construction example of the widening work which applied this invention is shown in steps, (A) is sectional drawing, (B) is a perspective view. It is the same figure which shows the next step. It is the same figure which shows the last step. It is a perspective view which shows the construction example which widens between two parallel shield tunnels. It is a perspective view which shows the construction example which widens the side part of a shield tunnel. It is a perspective view which shows the construction example which widens the lower part of a shield tunnel. It is a top view of the Example which inserts a covering material into the cut slit and construct | assembles the continuous wall for widening. FIG. The cross section of the side part cutting machine in the same Example is shown, (A) is the state which pushes a covering material while pushing a side cutting machine, (B) has secured the insertion space of the covering material in the side cutting machine. State. It is a top view of the Example which fills the cut slit with the filler for temporary holding of a natural ground. FIG. It is a top view of the Example which inserts a lining material into a slit from the inside of a shield lining. FIG. It is a figure which shows the construction procedure of the Example which extends a side cutting machine from the overhang | projection part provided in the preceding shield machine to the subsequent shield machine, and performs slit cutting in order of (A)-(D). It is a figure which shows the construction procedure of the Example which passes a side cutting machine between the overhang | projection parts of two shield machines, and performs the slit cutting in order of (A)-(D). It is a figure which shows the construction procedure of the Example which extends a left and right side part cutting machine downward from the right and left overhanging part which a shield machine can accommodate, and performs slit cutting in order of (A)-(D).

Explanation of symbols

1 Shield machine 2, 2A, 2B Shield tunnel 3 Body (skin plate)
4 Cutting Machine Storage 4a Bulkhead 5 Side Cutting Machine 6 Main Cutter 7, 7A, 7B Widening Continuous Wall 8 Reinforcing Bars 9 Giber etc. 10/11 Backfilling Material 12 Chain Cutter 13 Jacket 14 Feeding Mud Pipe 15 Drainage Pipe 16 Solidified material pressure feed pipe 17 Roller cutter 18 Chain 19 Roller cutter 20 Shaft 21 Auger 22 Simultaneous rotation unit 23A / 23B Upper / lower lining 24 Intermediate wall 25 Widening lining 26 Cutting cutter 27 / 27A / 27B Side cutting machine 28 Segment 29 Shield Covering 30 Slit 31 Covering material 32 Widening continuous wall 33 Propulsion jack 34 Tail seal 35 Filling material 36 Overhang portion 37A / 37B Slit 38A / 38B Shield lining 39A / 39B Widening continuous wall 40 Large section tunnel 41A / 41B Left / Right Overhanging parts 42A and 42B Left and right side cutting machines 43A and 43B Slit 44A / 44B Left and right widening continuous wall 45 Ground improvement 46 Shield lining 47 Large section tunnel

Claims (22)

  A side cutting machine is extended from the shield machine to the outer periphery side of the trunk, and the shield machine is excavated. A shield widening method characterized by constructing a continuous wall for widening that projects from the shield tunnel by a shield machine to the outer periphery side by constructing a work.   The shield widening method according to claim 1, wherein the lining of the slit is performed by filling the slit with a solidifying material such as concrete.   3. The shield widening method according to claim 2, wherein a solidified material such as concrete is pumped from the shield machine to the slit by a solidified material pumping mechanism.   The shield widening method according to claim 3, wherein the solidifying material pumping mechanism is moved integrally with the side cutting machine, and the solidifying material is pumped to the slit on the rear side of the side cutting machine.   4. The shield widening method according to claim 3, wherein the solidifying material feeding mechanism is separated from the side cutting machine, and the solidifying material is pressure fed to the slit independently of the side cutting machine.   2. The shield widening method according to claim 1, wherein the construction of the lining to the slit is performed by inserting a lining member into the slit.   The shield widening method according to claim 6, wherein a large number of lining members are inserted into a slit from a shield machine or a shield tunnel and assembled.   The shield widening method according to claim 7, wherein a reaction force is applied to the assembled lining member to propel the side cutting machine.   9. The shield widening method according to claim 6, 7 or 8, wherein a filler for temporarily holding a natural ground is filled into the slit before the lining member is inserted into the slit.   The shield widening method according to any one of claims 1 to 9, wherein the side cutting machine is expanded and contracted inward and outward from a cutting machine storage portion provided in the shield machine.   The shield widening method according to any one of claims 1 to 9, wherein the side cutting machine extends from the projecting portion of the shield machine and protrudes.   The shield widening method according to any one of claims 1 to 11, wherein the earth cut by the side cutting machine is taken into the shield machine by a earth taking-in mechanism at the rear side of the side cutting machine.   The shield widening method according to claim 12, wherein the earth and sand intake mechanism is provided on the rear side of the side cutting machine and is moved integrally with the side cutting machine.   After constructing the upper and lower widening continuous walls with the construction of the preceding shield tunnel, construct the subsequent shield tunnel along the upper and lower widening continuous walls, or for the upper and lower widening with the construction of the subsequent shield tunnel 14. The shield widening according to claim 1, wherein the continuous wall is constructed along the preceding shield tunnel, and the leading shield tunnel and the trailing shield tunnel are connected between the upper and lower widening continuous walls. Construction method.   14. The upper and lower widening continuous walls are constructed from one or both of two parallel shield tunnels, and the two shield tunnels are coupled between the upper and lower widening continuous walls. The shield widening method according to any one of the above.   The shield widening method according to any one of claims 1 to 13, wherein the widening continuous wall is continuously constructed on the side of the shield tunnel so as to form a tunnel structure.   A side cutting machine that projects from the trunk of the shield machine to the outer periphery and slits the ground on the side as the shield machine digs, and takes the earth and sand from the cut into the shield machine. A continuous wall for widening, which includes a soil taking-in mechanism and a solidifying material pumping mechanism for pumping a solidified material such as concrete from the inside of the shield machine into the slit by the slit cutting, and projects from the shield tunnel by the shield machine to the outer peripheral side. A shield machine capable of widening lining, characterized in that it can be constructed.   18. The shield machine according to claim 17, wherein the side cutting machine is mounted so as to be extendable inward and outward from a cutting machine storage part provided in the shield machine.   The shield excavator capable of widening lining according to claim 18, wherein the solidification material pumping mechanism is provided on the rear side of the side cutting machine and is moved integrally with the side cutting machine.   21. The shield machine according to claim 19, wherein the solidified material feeding mechanism is separated from the side cutting machine, and feeds the solidified material to the slit independently of the side cutting machine.   A side cutting machine that projects from the trunk of the shield machine to the outer periphery and slits the ground on the side as the shield machine digs, and takes the earth and sand from the cut into the shield machine. A sediment-incorporating mechanism and a lining member insertion mechanism for inserting a lining member into the slit by the slit cutting from the inside of the shield machine, and a continuous wall for widening projecting from the shield tunnel by the shield machine to the outer peripheral side. A shield machine capable of widening lining, characterized in that it can be constructed.   The shield excavator capable of widening lining according to any one of claims 17 to 21, wherein the earth and sand taking-in mechanism is provided on the rear side of the side cutting machine and is moved integrally with the side cutting machine. .

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