KR20200140680A - Shield TBM Tunnel Backfill Method Using stretchy Segment and stretchy Segment - Google Patents

Abstract

To achieve the purpose, the present invention provides a stretchable segment used when a shield tunnel boring machine (TBM) tunnel construction is performed, wherein the stretchable segment (100) includes: a fixation unit (110) forming a main body to be used in constructing a wall of a TBM tunnel; and a stretchable unit (120) embedded in the fixation unit (110) and expanded to come in close contact with an excavated surface (R). In addition, the present invention provides a shield TBM tunnel backfill method using a stretchable segment comprising the steps of: installing the stretchable segments (100) at regular intervals to form backfill sections (D1, D2, ..., Dn) divided between the stretchable segments (100); and sequentially expanding the stretchable segments (100) to fill the backfill sections (D1, D2, ..., Dn) with backfill materials in a state of stopping the flow of underground water in the backfill sections (D1, D2, ..., Dn) while general segments (20) are installed between the stretchable segments (100).

Description

Shield TBM Tunnel Backfill Method Using Stretchy Segment and Stretchy Segment}

The present invention relates to a method for backfilling a shield TBM tunnel using a stretch segment and a stretch segment, and more particularly, a stretch segment and a stretch segment capable of improving the backfill effect by backfilling in a state in which groundwater flow is blocked using the stretch segment. It relates to a shield TBM tunnel backfilling method using.

In general, the construction method for tunnel excavation is divided into a conventional construction method by blasting excavation and a modern mechanical construction method by excavation of a tunnel boring machine (TBM).

However, the construction of the tunnel by the conventional construction method continuously reveals problems and limitations in practical application due to excessive land compensation costs, difficulty in securing labor force, traffic weight in the construction process, and civil complaints caused by noise and vibration.

Therefore, in recent years, in Korea including advanced countries, the tunnel construction performance by the modernized mechanical construction method is increasing day by day.

This trend is due to changes in the environment that require environmentally friendly construction work to minimize environmental damage caused by noise and vibration to improve the quality of life as economic advancement continues.

In particular, among the mechanical tunnel construction methods, the shield tunnel construction method is from the rear of the curtain by connecting shield equipment to protect the excavation surface (R) on the front and rear of the TBM while constructing the tunnel by excavation and propulsion of TBM. This is a method of constructing a tunnel by assembling a cylindrical segment in the shape of a tunnel wall.Depending on the tunnel diameter and the installation method of the excavation surface protection facility, the shield TBM tunnel construction method and micro shield or semi-shield (semi shield) Classified as TBM tunnel construction method.

As shown in Fig. 1, the shielding method is an excavation method used to create a tunnel on a soft or aquatic ground. A cylindrical shield made of iron is inserted into a vertical sphere to excavate the tunnel while rotating the cutter head, and the shield It is a method of creating a tunnel by repeatedly installing segments from the back.

Therefore, in the area through which the shield passes, a void is inevitably generated between the excavation surface R and the segment 20, and the void is filled by injecting a liquid backfill material for stabilization.

In addition, the injection method of backfill is divided into simultaneous injection from the rear of the TBM equipment, immediate injection from the rear of the equipment 10m, and rear injection from the rear of the equipment 70m depending on the injection location.

In addition, as for the backfilling material, Liquid A (cement + water) and Liquid B (hardener + water) are pumped to the injection port through separate pressure feeding pipes, and the two chemicals are mixed at the injection port, filling the voids, and then curing.

At this time, when the amount of groundwater flow in the void is large, the mixing ratio of the backfill material may be disturbed or lost due to groundwater.

That is, as it is washed by groundwater and lost through the TBM chamber, the loss of the injection agent may be large, or the mixing ratio may be disturbed due to dilution in the groundwater, and the uncured liquid may remain.

In addition, it is hardened in a concentrated state around the inlet, but it is diluted at a point away from the inlet and cannot be hardened, so that the continuous stone in the backfill state may fall. I can.

Therefore, when backfilling is poor, the ground subsides, and the tunnel structure is damaged, cracks are generated, and groundwater leaks out, which adversely affects the structural safety of the tunnel, thereby greatly reducing the stability and construction efficiency of the tunnel.

Korean Registered Patent Publication No. 10-0877580 Korean Registered Patent Publication No. 10-1550159 Korean Registered Patent Publication No. 10-1482883 Korean Patent Application Publication No. 10-2019-0049121 Korean Patent Application Publication No. 10-2011-0078408

The present invention is to solve the above-described problem, by installing a plurality of extension segments at regular intervals to divide the backfill section between the extension segments in stages, and by sequentially expanding the extension segments, groundwater flow in the backfill section between the extension segments The purpose of this is to provide a new segment that minimizes the contact between the backfill material and groundwater by filling the backfill material in the state of blocking the shield TBM tunnel backfilling method using the new segment.

However, the object of the present invention is not limited to the above-mentioned object, and another object that is not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention relates to a telescopic segment used when constructing a shield TBM (Tunnel Boring Machine) tunnel, wherein the telescopic segment 100 forms a main body for use in building a wall surface of the TBM tunnel. An elastic segment is provided, characterized in that it includes a fixed portion 110 and an elastic portion 120 that is built in the fixed portion 110 and is expanded to be in close contact with the excavation surface R.

In addition, the elastic segment 100 is installed in a state in which the elastic part 120 is contracted inside the fixing part 110, and then the elastic part 120 is expanded to come into close contact with the excavation surface R. To do.

On the other hand, the fixing part 110, the upper and lower portions are open and penetrated, the frame part 111 constituting the main body, the frame part 111 is coupled to a predetermined position inside the frame part 111 It comprises a closing plate 112 covering the open lower surface.

In addition, the expansion and contraction portion 120 is placed on the top of the closing plate 112 so as to be provided on the inside of the frame part 111, the upper and lower portions are opened to pass through the expansion tube 121, the The tube protection plate 122 is provided on the upper side of the elastic tube 121 to cover the open upper surface of the elastic tube 121, and is fitted inside the upper end of the elastic tube 121 to be integrated with the tube protection plate 122 It comprises a pressing frame 123 that is coupled to, and a binding frame 124 that is bonded to the closing plate 112 while being adhered to the lower end of the expansion butt 121.

In addition, the telescopic tube 121 includes a tube body 121a having a plurality of corrugated layers (T) that can be folded and folded in multiple stages along the upper and lower side directions, and a lower end of the tube body 121a. A binding frame bonding portion 121b protruding and having its outer wall adhered to the inner surface of the binding frame 124, and a protective plate bonding portion 121c in contact with the tube protection plate 122 at an upper end of the tube body 121a, and the The pressing frame 123 is provided at the lower side of the protective plate bonding part 121c, and a pressing frame cover part connecting the protective plate bonding part 121c and the tube body 121a while surrounding the outer wall of the pressing frame 123 ( 121d).

In addition, the closing plate 112, a binding bracket (112a) protruding to the upper side of the closing plate (112) and in contact with the inner wall of the binding frame bonding portion (121b) of the expansion and contraction tube (121), and the closing plate (112) Including a plurality of reinforcing ribs (112c) formed at a predetermined position of the expansion and contraction tube (121) into which an expanding agent is injected into, and a plurality of reinforcing ribs (112c) coupled to the lower side of the closing plate (112). Done.

In addition, the expansion and contraction tube 121 is characterized in that it is provided in the inner space (G) formed on the inside of the frame portion 111 by folding the corrugated layer (T) of the tube body (121a) is folded.

In addition, when the corrugated layer (T) of the expansion and contraction tube 121 is folded and folded to be provided in the inner space (G) of the frame part 111, the tube protection plate 122 is the open of the frame part 111 It is characterized in that it has a structure covering the upper surface.

In addition, the expansion and contraction tube 121 is expanded as the corrugated layer (T) of the tube body 121a, which was folded and folded by the expansion agent injected through the expansion agent injection hole 112a of the closing plate 112, is unfolded and expanded. It is characterized in that the tube protection plate 122 is in close contact with the excavation surface (R).

On the other hand, the pressing frame 123 and the binding frame 124 are made of MDF plywood, the corrugated layer (T) of the tube body (121a) is formed in three stages, the finishing plate (112) is the frame part It is preferable to be welded to a point 2/3H from the lower side of (111).

On the other hand, in the shield TBM tunnel backfilling method using a stretch segment, the stretch segments 100 are installed at regular intervals to form divided backfill sections (D1, D2, ..., Dn) between the stretch segments 100, In a state in which the groundwater flow in the backfill section (D1, D2,...,Dn) is blocked by sequentially expanding the elastic segment 100, the rear filler is filled, but between the elastic segments 100, a general segment 20 There is provided a shield TBM tunnel backfilling method using a new segment, characterized in that installed.

In addition, the shield TBM tunnel backfilling method using the new segment includes: a, dividing backfilling sections (D1, D2, ..., Dn) at predetermined intervals on the expected excavation surface excavated in a preset direction (S110); b, step of setting the installation position (A1, A2, ..., An ₊ ₁) of the stretch segment at the divided boundary position of the backfill section (D1, D2, ..., Dn) (S120); c, by operating the shield TBM equipment 10 to excavate to the first expansion segment installation position (A1) (S130); d, installing and expanding the first elastic segment 100a at the first elastic segment installation position A1 (S140); e, operating the shield TBM equipment 10 to excavate the second expansion segment installation position (A2) (S150); f, installing and expanding the second elastic segment 100b at the second elastic segment installation position A2 (S160); g, the step of filling a backfill material in the first backfill section between the first stretchable segment 100a and the second stretchable segment 100b (S170); and, from step e (S150) to step g (S170) A shield TBM tunnel backfilling method using a stretch segment configured to repeat) until the preset backfilling section (D1, D2, ..., Dn) is charged is provided.

In addition, the expansion and contraction segment 100 is characterized in that it is installed in a state provided in the inner space (G) of the frame portion 111 by folding the corrugated layer (T) of the tube body (121a) is folded.

In addition, the method of inflating the elastic segment 100 is expanded while the corrugated layer (T) of the elastic tube 121 is unfolded by the expanding agent injected through the expanding agent injection hole 112b of the closing plate 112 The tube protection plate 122 is characterized in that it is in close contact with the excavation surface (R).

In addition, the step g (S170) of filling the back filler includes g-1, a back filler injection pipe 300 in the grout hole of the general segment 20a installed in front of the excavation direction of the first elastic segment 100a. Step of installing (S171); g-2, installing the groundwater drainage pipe 400 in the grout hole of the general segment 20b installed in the rear opposite to the excavation direction of the second expansion segment 100b (S172); g-3, injecting a back filler into the back filler injection pipe 300 (S173); g-4, the step of draining the groundwater through the groundwater drainage pipe 400 (S®); a shield TBM tunnel backfilling method using a new segment, characterized in that it comprises.

Further, the installation position of the new segment (A1, A2, ..., An ₊ ₁) the installation position of the last expansion segment (An ₊ ₁) of which is provided immediately after the room of the shield TBM equipment (10).

In addition, since the final expansion segment (An ₊ ₁) is installed immediately after the shield TBM equipment 10, groundwater filled in the final backfill section Dn can be blocked from entering the chamber of the TBM equipment 10. It is characterized in that it is easy to check and replace the drilling bit by opening the chamber.

Features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in the present specification and claims should not be interpreted in a conventional and dictionary meaning, and the inventor may appropriately define the concept of the term in order to describe his or her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

As described above, according to the present invention, it is possible to provide a new type of expansion and contraction segment, and the backfilling effect can be improved by performing backfilling in a state in which groundwater flow is blocked by using this expansion and contraction segment.

1 is a side view schematically showing a method for backfilling a conventional shield TBM tunnel;
2 is a perspective view schematically showing a general segment according to an embodiment of the present invention,
3 is a side view schematically showing a method for backfilling a shielded TBM tunnel using an elastic segment according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view showing a section of the'A-A' portion of FIG. 3;
5 is a cross-sectional view showing a section of the'B-B' portion of FIG. 3;
6 is a perspective view schematically showing the expansion and contraction segment before (a) and after expansion (b) according to an embodiment of the present invention;
Figure 7 is an exploded perspective view showing the binding of the expansion and contraction according to an embodiment of the present invention,
8 is an exploded perspective view showing the binding of the expansion and contraction portion and the frame portion according to an embodiment of the present invention,
9 is a cross-sectional view showing a section of the'C-C' of FIG. 6;
10 is a process flow chart for a shield TBM tunnel backfilling method using a stretch segment according to the present invention,
11 is a process flow chart for a method of filling the backfill material according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

In addition, the following examples do not limit the scope of the present invention, but are merely exemplary matters of the elements presented in the claims of the present invention, and are included in the technical idea throughout the specification of the present invention and the composition of the claims. Embodiments including elements that can be substituted as equivalents in elements may be included in the scope of the present invention.

2 is a perspective view schematically showing a general segment according to an embodiment of the present invention, and FIG. 3 is a side view schematically showing a method for backfilling a shield TBM tunnel using an elastic segment according to an embodiment of the present invention. , FIG. 4 is a cross-sectional view showing a section of the'A-A' portion of FIG. 3, FIG. 5 is a cross-sectional view showing a cross-section of the'B-B' portion of FIG. 3, and FIG. 6 is a view of an elastic segment according to a preferred embodiment of the present invention. A perspective view schematically showing the expansion (a) and after expansion (b), Figure 7 is an exploded perspective view showing the binding of the expansion and contraction according to a preferred embodiment of the present invention, Figure 8 is a preferred embodiment of the present invention An exploded perspective view showing the binding of the elastic part and the frame part according to the present invention, FIG. 9 is a cross-sectional view showing a cross section of the'C-C' part of FIG. 6, and FIG. 10 is a process flow chart for a shield TBM tunnel backfilling method using the elastic segment according to the present invention. , Figure 11 is a process flow chart for a method of filling the backfill material according to the present invention.

As shown in Fig. 2 and below, a new segment 100 used when constructing a shield TBM (Tunnel Boring Machine) tunnel includes a fixing part 110 constituting a main body to be used for wall surface construction of the TBM tunnel, and the It is built in the fixed portion 110, and includes an expansion portion 120 that is expanded and in close contact with the excavation surface (R).

In addition, the expansion and contraction segment 100 may be formed to form a columnar shape to be used for building a wall surface of a TBM tunnel.

In addition, the elastic segment 100 is installed in a state in which the elastic portion 120 is contracted inside the fixing portion 110, and then the elastic portion 120 is expanded to come into close contact with the excavation surface R.

On the other hand, the fixing part 110 has a shape through which the upper and lower portions are opened, and the frame part 111 forming the main body is coupled to a predetermined position inside the frame part 111 to open the frame part 111 It comprises a finishing plate 112 covering the lower surface.

At this time, the frame part 111 includes an expansion tube 121, a tube protection plate 122, a compression frame 123, and a binding frame 124.

The telescopic tube 121 is placed on the top of the closing plate 112 so as to be provided on the inside of the frame part 111, and the upper and lower portions are opened and penetrated.

In addition, the tube protection plate 122 is provided on the upper side of the expansion and contraction tube 121 to cover the open upper surface of the expansion and contraction tube 121.

In addition, the pressing frame 123 is provided so as to be integrally coupled to the tube protection plate 122 by being fitted inside the upper end of the elastic tube 121.

In addition, the binding frame 124 is provided to be bonded to the closing plate 112 while being adhered to the lower end of the expansion and contraction butt 121.

In addition, it is preferable that the pressing frame 123 and the binding frame 124 are made of MDF plywood.

In addition, the telescopic tube 121 includes a tube body 121a, a binding frame bonding portion 121b, a protective plate bonding portion 121c, and a pressing frame cover portion 121d.

The tube body 121a is formed with a plurality of corrugated layers (T) that can be folded in multiple stages along the upper and lower directions.

In addition, the binding frame bonding portion 121b is formed to protrude from the lower end of the tube body 121a to the lower side so that the outer wall thereof adheres to the inner surface of the binding frame 124.

In addition, the protective plate bonding portion 121c is formed to contact the tube protective plate 122 at an upper end of the tube body 121a.

And the pressing frame 123 is provided at the lower side of the protective plate bonding portion 121c, and the pressing frame connecting the protective plate bonding portion 121c and the tube body 121a while surrounding the outer wall of the pressing frame 123 The cover portion 121d is formed.

That is, the pressing frame cover portion 121d and the protective plate bonding portion 121c are formed continuously, and the pressing frame 123 is fitted into the pressing frame cover portion 121d and the protective plate bonding portion 121c.

Accordingly, the protection plate bonding portion 121c is provided between the pressing frame 123 and the butt protection plate 122, and a screw hole is formed in the tube protection plate 122, so that the tube protection plate 122 and the protection plate bonding portion 121c, and The pressing frame 123 is screwed and coupled.

In addition, a tube joint 122a corresponding to the protective plate joint 121b of the expansion and contraction tube 121 is formed on the lower surface of the tube protective plate 122, and a screw hole h1 is formed in the tube joint 122a. do.

In addition, the expansion and contraction tube 121 may be provided in a cylindrical or polygonal shape while the upper and lower surfaces are open.

In addition, the corrugated layer (T) of the tube body (121a) is preferably formed in three stages.

In addition, the closing plate 112 is a binding bracket (112a) protruding to the upper side of the closing plate (112) to support the binding frame adhesive portion (121b) in contact with the inner wall of the expansion tube (121), and the closing plate A plurality of reinforcing ribs (112c) formed at a predetermined position of (112) to be injected into the expansion agent to expand the expansion tube (121) (112b), and a plurality of reinforcing ribs (112c) coupled to the lower side of the closing plate (112). Including.

In addition, the closing plate 112 is welded to a point 2/3H from the lower side of the frame part 111.

In addition, a plurality of binding holes (h2) is formed at the edge of the closing plate (112).

And the binding frame 124 is provided between the frame part 111 and the binding bracket 112a, and the closing plate 112 and the binding frame 124 are screwed through the binding hole h2 And are combined.

On the other hand, the expansion and contraction tube 121 is provided in the inner space (G) formed inside the circumferential wall of the frame portion 111 by folding the corrugated layer (T) of the tube body (121a) is folded.

In addition, when the corrugated layer (T) of the expansion and contraction tube 121 is folded and folded to be provided in the inner space (G) of the frame part 111, the tube protection plate 122 is the open of the frame part 111 It is provided in a structure covering the upper surface.

That is, the tube protection plate 122 is provided as an upper cover of the frame portion 111 when the elastic tube 121 is in a contracted state.

That is, when the expansion and contraction tube 121 is in a contracted state, the expansion and contraction segment 100 is provided in the shape of a closed enclosure and maintains the shape of the enclosure until storage, transport, and installation.

In addition, the expansion and contraction tube 121 is expanded while the corrugated layer (T) of the tube body (121a), which was folded and folded by the expansion agent injected through the expansion agent injection hole (112a) of the closing plate (112), is expanded. The tube protection plate 122 is in close contact with the excavation surface R.

That is, in the expansion and contraction segment 100, an expansion agent is injected into the frame part 111 through the expansion agent injection hole 112b to expand the expansion and contraction tube 121 so that the closing plate 112 is exposed to the excavation surface (R). It is possible to block the air gap between the segment and the excavation surface by tight contact.

At this time, it is preferable to use a cement paste as the expanding agent.

Meanwhile, in the shield TBM tunnel backfilling method using the stretchable segment 100, the stretchable segments 100 are installed at regular intervals and divided backfilling sections between the stretchable segments 100 (D1, D2, ..., Dn) To form.

In addition, a general segment 20 is installed between the expansion and contraction segments 100, and the expansion and contraction segment 100 is sequentially expanded to block the flow of groundwater in the backfilling section (D1, D2, ..., Dn). It characterized in that the back filling material is filled.

That is, the shield TBM tunnel backfilling method using the new segment includes: a, partitioning backfill sections (D1, D2, ..., Dn) at predetermined intervals on an expected excavation surface excavated in a preset direction (S110), and b , Step (S120) of setting the installation position (A1, A2, ..., An ₊ ₁) of the expansion segment at the divided boundary position of the backfill section (D1, D2, ..., Dn) and, c, the shield TBM equipment Excavating (S130) to the first elastic segment installation location (A1) by operating (10), and d, installing and expanding the first elastic segment (100a) at the first elastic segment installation location (A1) (S140) and, e, a step of excavating to a second expansion and contraction segment installation position (A2) by operating the shield TBM equipment 10 (S150), and f, a second in the second expansion and contraction segment installation position (A2). Step (S160) of installing and expanding the elastic segment (100b), g, the step of filling the back filling material in the first back filling section between the first elastic segment (100a) and the second elastic segment (100b) (S170) It is made including.

In addition, the tunnel construction is completed by repeating steps e (S150) to g (S170) until the preset backfill sections (D1, D2, ..., Dn) are charged.

In addition, the elastic segment 100 is installed in a state provided in the inner space (G) of the frame portion 111 by folding the corrugated layer (T) of the tube body (121a) is folded.

In addition, the method of inflating the elastic segment 100 is expanded while the corrugated layer (T) of the elastic tube 121 is unfolded by the expanding agent injected through the expanding agent injection hole 112b of the closing plate 112 The tube protection plate 122 is characterized in that it is in close contact with the excavation surface (R).

In addition, the step g (S170) of filling the back fill material is g-1, and the back fill material injection pipe 300 is installed in the grout hole of the general segment 20a installed in front of the excavation direction of the first elastic segment 100a. Step (S171) and g-2, step of installing the groundwater drainage pipe (400) in the grout hole of the general segment (20b) installed in the rear opposite to the excavation direction of the second expansion segment (100b) (S172) And, g-3, comprising the step of injecting the back fill material into the back fill material injection pipe 300 (S173), and g-4, the step of draining the groundwater through the groundwater drainage pipe 400 (S174). .

That is, the backfill material is injected through the backfill material injection pipe 300 and at the same time, the groundwater is drained by the amount of the backfill material filled through the groundwater drainage pipe 400, thereby preventing an increase in the injection pressure of the backfill material injection pipe 300, thereby filling effect Can increase.

In addition, the elastic segments installation position (A1, A2, ..., An ₊ ₁) of the installation location (An ₊ ₁) of the final segment of the new construction is preferably installed immediately after the chamber of the shield TBM equipment (10).

This is because the final expansion segment (An ₊ ₁) is installed immediately after the shield TBM equipment 10, so that groundwater filled in the final backfill section Dn can be blocked from entering the chamber of the TBM equipment 10. It can provide a comfortable and safe working environment when inspecting and replacing the excavation bit by opening it.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, and the present invention is not limited thereto, and those of ordinary skill in the art within the spirit of the present invention It is clear that the transformation or improvement is possible.

All simple modifications to changes of the present invention belong to the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

10: shield TBM equipment 11: cutter head
20: segment 100: stretch segment
110: fixing part 111: frame part
112: finishing plate 112a: bracket for binding
112b: expanding agent injection port 112c: reinforcing rib
120: expansion part 121: expansion tube
121a: tube body 121b: bonding frame bonding portion
121c: protective plate joint 121d: crimp frame cover
122: tube protection plate 123: pressing frame
124: binding frame 300: back filler injection pipe
400: groundwater drainage pipe R: excavation surface
T: wrinkle layer G: inner space of frame

Claims (12)

In the new segment used when constructing the shield TBM (Tunnel Boring Machine) tunnel,
The elastic segment 100,
A fixing part 110 constituting the main body to be used for wall surface construction of the TBM tunnel,
An expansion and contraction segment comprising an expansion and contraction part 120 that is built into the fixing part 110 and is expanded to be in close contact with the excavation surface R.
The method of claim 1,
The expansion and contraction segment 100 is characterized in that after the expansion and contraction portion 120 is installed in a contracted state inside the fixing part 110, the expansion and contraction portion 120 is expanded to be in close contact with the excavation surface (R). Telescopic segment.
The method of claim 2, wherein the fixing part 110,
The upper and lower portions are opened and penetrated, and the frame portion 111 constituting the main body,
An elastic segment comprising a closing plate 112 coupled to a predetermined position inside the frame part 111 to cover the open lower surface of the frame part 111.
The method of claim 3, wherein the stretchable portion 120,
An extension tube 121 having a shape that is placed on the top of the finishing plate 112 so as to be provided on the inside of the frame part 111, and has an open top and a bottom to pass through,
A tube protection plate 122 provided on the upper side of the elastic tube 121 to cover the open upper surface of the elastic tube 121,
A pressing frame 123 that is fitted inside the upper end of the elastic tube 121 and is integrally coupled to the tube protection plate 122,
An elastic segment comprising a binding frame 124 that is bonded to the closing plate 112 while being adhered to the lower end of the elastic butt 121.
The method of claim 4, wherein the expansion and contraction tube (121),
A tube body 121a having a plurality of foldable layers (T) that can be folded and folded in multiple stages along the upper and lower directions, and
A binding frame adhesive portion 121b protruding downward from the lower end of the tube body 121a so that its outer wall is adhered to the inner surface of the binding frame 124,
At the upper end of the tube body (121a), a protection plate junction (121c) in contact with the tube protection plate (122),
The pressing frame 123 is provided on the lower side of the protective plate bonding part 121c, and a pressing frame cover part connecting the protective plate bonding part 121c and the tube body 121a while surrounding the outer wall of the pressing frame 123 An elastic segment comprising (121d).
The method of claim 5, wherein the closing plate (112),
A binding bracket (112a) protruding to the upper side of the closing plate (112) and in contact with the inner wall of the binding frame bonding portion (121b) of the elastic tube (121),
An expanding agent injection port 112b formed at a predetermined position of the closing plate 112 and into which an expanding agent for expanding the expanding and contracting tube 121 is injected,
Stretching segment comprising a plurality of reinforcing ribs (112c) coupled to the lower side of the closing plate (112).
The method of claim 6, wherein the expansion and contraction tube (121),
An elastic segment, characterized in that the corrugated layer (T) of the tube body (121a) is folded and folded to be provided in the inner space (G) formed inside the frame part (111). In the shield TBM tunnel backfilling method using the stretch segment of claim 7,
The elastic segments 100 are installed at regular intervals to form a divided back filling section (D1, D2, ..., Dn) between the elastic segments 100,
In the state in which the groundwater flow in the backfill section (D1, D2,...,Dn) is blocked by sequentially expanding the elastic segment 100, the backfill material is filled,
Shield TBM tunnel backfilling method using a telescopic segment, characterized in that a general segment (20) is installed between the telescopic segments (100). The method of claim 8,
Shield TBM tunnel backfilling method using the stretch segment,
a, partitioning the backfilling sections D1, D2, ..., Dn at predetermined intervals on the expected excavation surface excavated in a preset direction (S110);
b, step of setting the installation position (A1, A2, ..., An ₊ ₁) of the stretch segment at the divided boundary position of the backfill section (D1, D2, ..., Dn) (S120);
c, by operating the shield TBM equipment 10 to excavate to the first expansion segment installation position (A1) (S130);
d, installing and expanding the first elastic segment 100a at the first elastic segment installation position A1 (S140); Step of installing and expanding the first expansion segment
e, operating the shield TBM equipment 10 to excavate the second expansion segment installation position (A2) (S150);
f, installing and expanding the second elastic segment 100b at the second elastic segment installation position A2 (S160);
g, the step (S170) of filling a backfill material in the first backfill section between the first elastic segment 100a and the second elastic segment 100b (S170); including,
Shield TBM tunnel backfilling method using a stretch segment configured to repeat the step e (S150) to step g (S170) until the preset backfill section (D1, D2, ..., Dn) is charged. The method of claim 9,
The elastic segment 100 is a shield using an elastic segment, characterized in that the corrugated layer (T) of the tube body (121a) is folded and folded to be installed in the inner space (G) of the frame unit (111) How to backfill TBM tunnels. The method of claim 9,
Among the installation positions (A1, A2, ..., An ₊ ₁) of the expansion segment, the installation position (An ₊ ₁) of the final expansion segment is an expansion segment, characterized in that it is installed immediately after the shield TBM equipment (10). Shield TBM tunnel backfill method used. The method of claim 11,
The final expansion segment (An ₊ ₁) is installed immediately after the shield TBM equipment 10, so that the groundwater in the final backfill section Dn can be blocked from entering the chamber of the TBM equipment 10. Shield TBM tunnel backfilling method using a telescopic segment, characterized in that it is open to facilitate inspection and exchange of excavation bits.

Images