KR100834076B1 - None open cut tunnelling method and tunnel - Google Patents

Abstract

Non-adhesive tunnel excavation method and a tunnel structure installed by the method according to the present invention at a predetermined interval in the width direction of the tunnel at the height of the tunnel to be excavated from two to five large diameter steel pipe is fixed to the transverse connecting steel plate on the top The step of the earth excavation in the longitudinal direction of the tunnel and spaced apart, and the small-diameter steel pipe is fixed in the longitudinal direction of the tunnel is fixed to the horizontal connection steel plate spaced up and down with a predetermined width between the large diameter steel pipes Connecting the large diameter steel pipe to the transverse direction by excavation and removing the earth and sand existing between the small diameter pipe and the transverse connecting steel plate, and making the base between the horizontal connecting steel plate from which the soil is removed. While installing the slab while pressing the upper slab of the tunnel, and collecting the small diameter steel pipe, both sides of the lower side of the large diameter steel pipe Press-installing the steel pipe for earth retaining; forming a small work tunnel under the large-diameter steel pipe and forming a foundation; and opening the upper portion of the work tunnel to join the base of the slab and the work tunnel. Forming a step, and excavating the tunnel surrounded by the concrete support wall and the slab, and placing the slab in the lower portion of the excavated tunnel to combine with the base to complete the tunnel, large diameter steel pipe and small diameter The construction of the upper surface of the tunnel, which is a difficult construction, is made very easily by using the lateral connecting steel plate of the steel pipe, which greatly reduces the air, reduces the manpower, and solves the problems of the existing construction method, in which the foundation is continuously submerged until the end of construction. The small diameter steel pipe used in the process and the transverse connecting steel plate at the bottom can be recovered and reused. Support pillars and walls of the tunnel is also constructed so yitorok for prefabricated construction method was to build the structural stability after the temporary ground reinforcement construction will never be able to top the roadbed does not sink under construction can safely use the upper transport.

Description

Non-open tunnel tunneling method and tunnel structure installed by the method {None open cut tunneling method and tunnel}

1 is a longitudinal cross-sectional view of a tunnel structure excavated by a non-adhesive tunnel excavation method according to the present invention;

Figure 2 is a process diagram of the non-adhesive tunnel excavation method according to the invention

Figure 3a is a schematic cross-sectional view showing the arrangement of the large diameter steel pipe as a first step of the non-adhesive tunnel excavation method according to the present invention

Figure 3b is a schematic cross-sectional view showing a connection arrangement between the small diameter steel pipe and the large diameter steel pipe of the second step of the present invention

Figure 3c is a schematic cross-sectional view showing a state of removing the soil between the lateral connecting steel sheet in the present invention

Figure 3d is a schematic cross-sectional view showing a state of installing the upper slab in the present invention

Figure 3e is a schematic cross-sectional view showing the installation state of the steel pipe for use in the present invention

Figure 3f is a schematic cross-sectional view showing a state in which the working tunnel is formed and the base portion formed in the present invention

Figure 3g is a schematic cross-sectional view showing the step of forming a concrete support wall in the present invention

Fig. 3h is a schematic tunnel sectional view showing the step of digging a tunnel;

Figure 4 is a longitudinal sectional view showing the insertion of a small diameter steel pipe while gradually opening a portion of the large diameter steel pipe;

5 is a schematic cross-sectional view showing a cross section of the upper slab in the installation of the upper slab;

FIG. 6A is a partial detailed view of I of FIG. 5, and FIG. 6B is a partial detailed view of II of FIG.

Figures 7a, 7b is a schematic cross-sectional view showing different embodiments of the retaining steel pipe

8A and 8B are schematic cross-sectional views showing different embodiments of the insertion end and the gripping end of the transverse connecting steel sheet.

9A and 9B are schematic detailed cross-sectional views showing the installation of the concrete support walls at the side and center portions;

10 is a schematic longitudinal cross-sectional view showing a construction method according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1. Large diameter steel pipe 2. Small diameter steel pipe 3. Upper slab

4. Steel pipe for soil barrier 5. Work tunnel 6. Foundation

7. Concrete support wall

The present invention relates to a non-adhesive tunnel excavation method and a tunnel structure installed by the method. More specifically, the present invention relates to a tunnel excavation method that crosses highway crossings, rail road crossings, and other ground and underground obstacles that cannot be attached. While minimizing damage to the surrounding environment, the construction period is shortened and there is no fear of ground subsidence during construction, which ensures the safety of traffic, and the excavation can be carried out in a simple manner without limiting the vertical and planar curves. The present invention relates to a non-entry tunnel excavation method and a tunnel structure installed by the method, which are excellent in recyclability and have no ground subsidence after initial ground reinforcement, and have excellent stability.

In general, a variety of methods are used as a non-removable tunnel excavation method, but the front jacking method is widely used as the most widely used method. This forward towing method places the precast box at the forward base and installs a hydraulic jack on the cable penetrated across the road or the railroad tow the box and advances it by a certain distance while excavating the roadbed or the roadbed in the forward box. This method cannot be used in the rock area but only in the soil area.There is a geological limitation, and the upper roadbed sinks excessively due to the disturbance during the towing of the sandbag filled in the upper and lower slabs of the upper slab. Continuous roadbed management to prevent derailment of trains and steel pipes on top and side installed prior to towing boxes are buried as a result of increasing construction costs, and excessive construction costs due to unusable tip shoe production and towing costs. If the tunnel becomes long In the case of asymmetrical structure, not only is it impossible to pull by hydraulic jack, but also it is impossible to pull on the vertical and planar curves. Due to the space, there was a problem that the construction cost is excessive.

An object of the present invention is to solve this problem, the formation of the upper surface of the tunnel is difficult construction by using the transverse connecting steel plate of the large diameter steel pipe and small diameter steel pipe is very easy construction is greatly shortened air and the labor force It solved the problem of the existing construction method that the ground continuously sinks until the end of the construction.The small diameter steel pipe and the horizontal connecting steel plate used in the construction can be recovered and reused, and the support column and the wall of the tunnel are also constructed by the assembly method. As this facilitates the structural safety, and after temporary ground reinforcement during construction, the upper roadbed never sinks, so the non-adhesive tunnel excavation method and tunnel structure installed by the method can be used safely. To provide.

This object of the present invention is to be excavated in the longitudinal direction of the tunnel to be spaced apart at regular intervals in the width direction of the tunnel from the height of the tunnel to be excavated two to five large diameter steel pipe fixed to the lateral connecting steel plate on the top Press-fitting and connecting small-diameter steel pipes fixed with lateral connecting steel plates spaced at a predetermined width between the large-diameter steel pipes in a longitudinal direction by tunneling in the longitudinal direction of the tunnel and press-fitted to connect the large-diameter steel pipes in a transverse direction; And removing the earth and sand existing between the small diameter tube and the transverse connecting steel plate, and installing the slab while pressing the upper slab of the tunnel manufactured between the transverse connecting steel plate from which the soil is removed. In addition, the step of recovering the small-diameter steel pipe, the step of installing and pressing the steel pipe for earth retaining on both sides of the lower diameter of the large-diameter steel pipe, and the large-diameter steel Forming a small work tunnel below the base and forming a foundation, forming a concrete support wall to open the upper portion of the work tunnel and joining the slab and the base of the work tunnel; and to the concrete support wall and the slab. In the non-attached tunnel excavation method and tunnel structure installed by the method comprising the step of excavating the enclosed tunnel, and placing the slab in the lower portion of the excavated tunnel to combine with the base to complete the tunnel Is achieved.

Non-removable tunnel excavation method and a tunnel structure installed by the method according to the present invention will be more clearly understood by the embodiments described in detail below with reference to the accompanying drawings.

The present invention is characterized by arranging a small diameter steel pipe between a large diameter steel pipe and a large diameter steel pipe, and forming a transverse connecting steel plate on the large diameter steel pipe and the small diameter steel pipe, and forming a large diameter steel pipe and a small diameter steel pipe. By connecting and researching and introducing a new construction method that can easily perform the upper construction of the tunnel, which is a difficult construction during the tunnel construction, it can safely pass underground roadblocks such as railway roadbeds, roads, large-scale buildings and bridges or underground roadways. It can be widely used for underground roads, urban railroads, underground walkways, and cross-sections of urban tunnels without any limitations on longitudinal curves and planar curves.

In the non-adhesive tunnel excavation method according to an embodiment of the present invention, two to five large-diameter steel pipes having a lateral connecting steel plate fixed thereon are spaced apart at regular intervals in the width direction of the tunnel from the height of the tunnel to be excavated. And excavating the soil in the longitudinal direction of the tunnel; and excavating the small-diameter steel pipe in which the transverse connecting steel plates are fixed with a predetermined width between the large-diameter steel pipes and fixed in the longitudinal direction of the tunnel. Connecting the large diameter steel pipe to the transverse direction by press-fitting, removing the earth and sand existing between the small-diameter steel pipe and the transverse connecting steel plate, and forming a tunnel between the horizontal connecting steel plates from which the soil is removed. While installing the slab while pressing the upper slab and recovering the small-diameter steel pipe, and press-fitting the steel pipe for earth retaining on both sides of the lower side of the large-diameter steel pipe And forming a small work tunnel under the large-diameter steel pipe and forming a base, and forming a concrete support wall to open the upper portion of the work tunnel and to join the slab and the base of the work tunnel. Excavating the tunnel surrounded by the concrete support wall and the slab; and placing the slab in the lower portion of the excavated tunnel to combine with the foundation to complete the tunnel.

The step of press-installing the steel pipe for earth retaining on both sides of the lower side of the large-diameter steel pipe, and the step of forming a small work tunnel and forming the base portion of the lower side of the large-diameter steel pipe may be changed in the order, and thus the order changed It will be said that it is included in the scope of the present invention.

The transverse connecting steel plates 11 and 21 are fixed to the upper part of the large diameter steel pipe 1 by detachable bolts and nuts, and fixed to the side by welding welding the transverse connecting steel plates 11 to the small diameter steel pipes. The upper and lower parts of 2) are fixed by bolts and nuts to be detachable. In this embodiment, the large diameter steel pipe (1) of the diameter of 2400mm was used, the diameter of the small diameter steel pipe (2) of 800mm was used, but will not be limited thereto.

As illustrated in FIGS. 8A and 8B, insertion ends 111 and 211 for insertion are formed at one end and insertion ends of other transverse connection steel plates 11 and 21 at the other end of the transverse connecting steel plates 11 and 21. Holding end portions 113 and 213 for holding gripping portions 112 and 212 which are partially opened to insert 111 and 211 are formed so that insertion ends 111 and 211 of adjacent transverse connecting steel plates 11 and 21 are inserted and fixed.

As shown in FIG. 4, after the transverse connecting steel plates 11 and 21 of the large-diameter steel pipe 1 and the small-diameter steel pipe 2 are connected and installed, the transverse connecting steel plate 11 of the large-diameter steel pipe 1 is installed. Section between the incision and the incision is inserted into the small diameter steel pipe (2). The reason for further inserting the small-diameter steel pipe 2 is to support the pressure of the soil of the large-diameter steel pipe in the space through which the upper slab passes.

After the transverse connecting steel plates 11 and 21 are installed, cement ground reinforcing grouting is performed to reinforce the ground. Ground reinforcement grouting work is performed on the upper and lower parts of the transverse connecting steel sheet.

When the ground reinforcement grouting work is completed, the guide rail 31 for guiding the upper slab 3 is installed in the large diameter steel pipe 1 and the lower portion of the large diameter steel pipe 1 is cut and the cut portion is cut into the H beam 12. Reinforcing the lower portion of the large diameter steel pipe (1) is reinforced.

The step of removing the earth and sand existing between the small-diameter tube 2 and the transverse connecting steel plate 21 shown in Figure 3c can be easily removed by spraying high-pressure water to the soil.

The upper and lower transverse connecting steel plates are first fixed to the mud masonry on the side in which the upper slab is press-fitted before the upper slab 3 pressing operation performed after removing the soil in the transverse connecting steel plates 11 and 21. Take care not to move by slab indentation. Thereafter, the bolt coupling of the transverse connecting steel plate 21 installed on the upper and lower portions of the small diameter steel pipe (2) is released.

As such, when the small slab steel pipe 2 is press-fitted into the prefabricated upper slab 3 while the upper and lower transverse connecting steel plates 21 are released from each other, the small-diameter steel pipe 2 is discharged to the opposite side to be recovered. It will be possible.

As illustrated in FIG. 5, the upper slab 3 protrudes slightly above the upper surface 3a of the upper slab 3 so as to easily perform the press-in transfer. This is because the guide rail 32 is in contact with the upper transverse connecting steel plate 21 during the transfer, so that the frictional resistance is reduced to facilitate the transfer of the upper slab (3) (detailed in Figure 6a) 6B, a guide groove 33 is installed below the upper slab 3 to enable a straight forward movement of the upper slab 3 so that the guide groove 33 is connected in the lower transverse direction. A straight movement of the upper slab 3 is ensured by cooperation of the coupling table 22 and the guide groove 33 in a state where the movement of the steel plate 21 is coupled to the coupling table 22. In this way, the upper frame of one side of the tunnel is continuously installed by pressing a plurality of upper slabs 3 continuously in the longitudinal direction of the tunnel, and in this embodiment, the upper frame of another adjacent tunnel can also be terminated. Will be.

The press-installation of the upper slab 3 is completed, and in the step of press-installing the steel pipe for earth retaining on both sides of the large diameter steel pipe 1 below, in this embodiment, as shown in Figure 7a, Although the upper and lower extension steel plates 41 ', 41 ", 41'", 41 "" are adopted to press-fit the small-diameter steel pipe 42 to which it is fixed, as shown in FIG. ) Can be press-installed and installed the earthquake prevention guards, in which case the tortilla spill prevention guards 44 are installed. As described above, after the press-fitting installation of the retaining steel pipe 4 on both sides of the large-diameter steel pipe 1 is completed, the ground reinforcing grouting of the tunnel portion below is performed.

In the step of forming a small work tunnel (5) below the large-diameter steel pipe (1) and forming the base (6), the tunnel frame 52, which is detachably installed with the top cover 51, is fixed at a constant of 1 to 2 m. Install the spaced apart at intervals and install the earth plate (not shown) in the spaced interval to drill the work tunnel (5). After passing through the work tunnel like this, the upper cover 51 of the work tunnel 5 is replaced with a wooden brace (not shown), and the earth and sand surrounded by the large-diameter steel pipe (1) and the steel pipe (4) for both sides of the soil is removed. Top up and down the tunnel frame 52 and the vertical extension steel sheets 41 ", 41" "of the side by the binding device facility 45 to fix the tunnel frame 52 so as not to be pushed. It is possible to form the base portion 6. At the central support portion where the upper slab ends of the press-fitted sides meet before the base portion 6 is formed, both upper slabs are bundled with connecting bolts. In this case, a pile construction in which a plurality of micropiles 63 are installed on the bottom may be performed in advance to support the load transmitted from the upper part. 61 is installed and extends from the sidewall of the small tunnel The guide rail 62 is to support the concrete assembly wall 71. The guide groove 711 is formed below the concrete assembly wall 71 is inserted into the wall guide rail 61.

When the work tunnel 5 and the base 6 are completed and the large diameter steel pipe 1 and the work tunnel 5 penetrate up and down are formed, the prefabricated concrete assembly wall 71 is manufactured. The guide groove 711 of the concrete assembly wall 71 moves on the wall guide rail 61 when it is disposed on the wall guide rail 61 of the base 6 and pushes the concrete assembly wall 71 forward. In order to be arranged in series in order to form a basic concrete support wall (7) to be described later.

In particular, at the portion where the upper slabs 3 of the press-fitted two sides located at the upper part of the intermediate concrete support wall 7 serving as the central pillar of the tunnel meet, both upper slabs (2) are prevented from moving. 3) is tied to the fixing means 35, such as connecting bolts and fixed.

As described above, after a series of concrete assembly walls 71 are formed below each large diameter steel pipe 1, the reinforcing bars are stacked on the bottom of the slab 3 and the top of the concrete assembly wall 71, and then concrete is poured to connect them. After the reinforcing bars on the bottom and the base 6 of the concrete assembly wall 71, the concrete is poured by connecting to form a concrete support wall (7).

In the description of the present invention, the structure supporting the upper slab at the bottom is collectively described as a concrete support wall (7), but this is for the purpose of simply describing the description for the purpose of understanding and concrete support wall which is actually located on the wall of the tunnel. Although it can be distinguished from the concrete support pillar is installed in the middle of the tunnel and both of the structure to support the upper slab at the bottom, it is collectively described as a concrete support wall (7) without distinction in the description.

After the slab 3 and the foundation 6 are connected to each other by the concrete support wall 7, excavation of the earth and sand in the tunnel is carried out. The transverse connecting steel plate 21 at the lower part and the steel pipe 42 " The steel sheets 41 "', 41" "are recovered together with the earth and sand excavation. In addition, the fume pipe is press-fitted into the inner portion S3 and the non-shrink filling material is filled in the inner space S2, and then pulled with a wire or the like to hold the seizure steel pipe 42 'and the upper and lower extension steel sheets 41 ". In this way, after removing the earth and sand in the tunnel, concrete is poured into the empty space of the large-diameter steel pipe 1 remaining in the space, the outer space S4 and the work tunnel 5 remaining in the space.

In this state, the slab is placed at the bottom of the excavated tunnel and combined with the foundation to complete the tunnel.

Therefore, in the tunnel structure A according to the present invention formed according to the non-adhesive tunnel excavation method of the present invention, the ground reinforcing grouting layer is formed on the upper part of the tunnel, and the upper transverse connecting steel plates 11 and 21 are disposed. An upper slab 3 is formed below the upper transverse connecting steel plates 11 and 21 and the upper slab 3 is supported by the concrete support wall 7.

As shown in Fig. 10, in the non-adhesive tunnel excavation method according to another embodiment of the present invention, the up and down extension steel plates 41 ', 41 ", 41'", 41 "on the side instead of the small work tunnel (5). Adopted a method of press-installing small diameter steel pipe (42) is fixed. In the non-adhesive tunnel excavation method according to the embodiment of the present invention, a predetermined interval in the width direction of the tunnel from the height of the tunnel to which two to five large-diameter steel pipes in which a transverse connecting steel plate including a cover plate is fixed thereon is fixed. And the step of press-fitting soil excavation in the longitudinal direction of the tunnel, and the small-diameter steel pipe in which the transverse connecting steel plates are fixed with a predetermined width between the large-diameter steel pipes and fixed in the longitudinal direction of the tunnel. Connecting the large diameter steel pipe with the large diameter steel pipe and transversely by excavating the earth and sand; and removing the earth sand existing between the small diameter steel pipe and the transverse connecting steel plate, and between the horizontal connecting steel plate from which the soil sand has been removed. While installing the slab while pressing the upper slab of the fabricated tunnel and recovering the small diameter steel pipe, both sides of the lower side of the large diameter steel pipe Press-installing a plurality of retaining steel pipes to be connected up and down, excavating the soil between the retaining steel pipes and forming a foundation, and forming a concrete support wall to be coupled with the foundation of the slab and the work tunnel. And recovering the steel pipe for the earth retaining wall installed inside the concrete support wall while excavating the tunnel surrounded by the concrete support wall and the slab, and placing the slab in the lower part of the excavated tunnel to combine with the foundation to complete the tunnel. It comprises the step of. The retaining steel pipe located outside the concrete supporting wall is released from the bolt and nut of the upper and lower extension steel plates, and the upper and lower extension steel plates and the retaining steel pipe adjacent to the concrete supporting wall are recovered by the extrusion method of pressurizing the non-contraction filling material. The gap is filled with mortar. In the tunnel structure constructed by the non-adhesive tunnel excavation method according to the above embodiment, the ground reinforcing grouting layer is formed on the upper part of the tunnel, and the upper transverse connecting steel plates 11 and 21 are disposed, and the upper transverse connecting steel plate ( The upper slab 3 which forms the upper part of the tunnel is arrange | positioned at the lower part of 11 and 21, and the upper slab 3 is supported by the concrete support wall 7, and horizontally extended outside the concrete support wall 7 The upper and lower extension steel plates welded with the grid plate are embedded.

As described above, the non-adhesive tunnel excavation method and the tunnel structure installed by the method in the width direction of the tunnel at the height of the tunnel to be excavated two to five large diameter steel pipe is fixed to the transverse connecting steel plate on the top A step of excavating the earth and sand in the longitudinal direction of the tunnel and spaced apart at regular intervals, and a small diameter steel pipe having a horizontal connection steel plate fixed with a vertical width spaced apart from the large diameter steel pipes by a predetermined width. Connecting the large diameter steel pipe and the transverse direction by press-fitting and excavating the soil in the direction; and removing the earth and sand existing between the small-diameter steel pipe and the transverse connecting steel plate, and removing the earth connection of the horizontal connecting steel plate. While installing the slab while pressing the upper slab of the pre-fabricated tunnel in between and recovering the small diameter steel pipe, and the large diameter steel pipe Press-installing the steel pipes for both sides of the room, forming a small work tunnel under the large-diameter steel pipe and forming a base, and opening the upper portion of the work tunnel to couple with the base of the slab and the work tunnel. Forming a concrete support wall, and excavating the tunnel surrounded by the concrete support wall and the slab; and constructing a slab at the lower part of the excavated tunnel to combine the foundation with the foundation to complete the tunnel. The problem of the existing construction method is that the upper surface of the tunnel, which is difficult construction, is constructed very easily by using the lateral connecting steel plate of the steel pipe and the small-diameter steel pipe, which greatly shortens the air, reduces the manpower, and continuously subsides the ground until the end of construction. The small diameter steel pipe used in the construction and the transverse connecting steel plate at the bottom were recovered and You can use and support pillars and walls of the tunnels, so yitorok for the prefabricated construction method was built after the construction of structural anjeongseon temporarily ground reinforcement will be able top do not ballast can never sink to safely use the upper transport facilities under construction.

Claims (15)

In the non-attached tunnel excavation method, 2 to 5 large-diameter steel pipe in which the lateral connecting steel plate is fixed on the upper portion is spaced apart at regular intervals in the width direction of the tunnel at the height of the tunnel to be excavated, and the earth-excavation is pressed in the longitudinal direction of the tunnel; Connecting the small-diameter steel pipe with the horizontally-connected steel plates spaced apart from each other in large-diameter steel pipes with a predetermined width in a predetermined width by earth excavation in the longitudinal direction of the tunnel and press-fitting them to the large-diameter steel pipe in the transverse direction; Removing the earth and sand existing between the steel pipe and the transverse connecting steel plate, and installing the slab while pressing the upper slab of the tunnel manufactured between the transverse connecting steel plate from which the soil is removed, Recovering and pressing-installing the steel pipe for earth retaining into both side surfaces of the large diameter steel pipe, and a small work place below the large diameter steel pipe. Forming a base and forming a base, opening an upper portion of the work tunnel to form a concrete support wall for joining the slab with the base of the work tunnel, and excavating a tunnel surrounded by the concrete support wall and the slab. And placing a slab on the lower part of the excavated tunnel and combining it with the base to complete the tunnel. Claim 2 was abandoned when the setup registration fee was paid. According to claim 1, wherein the lateral connecting steel plates (11, 21) is characterized in that the upper and lower parts of the large diameter steel pipe (1) and the small diameter steel pipe (2) is coupled to the removable by bolts and nuts. Open tunnel excavation method. Claim 3 was abandoned when the setup registration fee was paid. According to claim 1, After the step of connecting the large-diameter steel pipe and the small-diameter steel pipe by the transverse connecting steel plate, the guide rail 31 for guiding the upper slab (3) in the large-diameter steel pipe (1) is installed and the large-diameter steel pipe ( Reinforcing the lower part of 1) and reinforcing the cut portion with the H-beam (12) to reinforce the downward of the large diameter steel pipe (1) Non-adhesive tunnel excavation method, characterized in that further configured. Claim 4 was abandoned when the registration fee was paid. The method of claim 1, wherein the step of removing the earth and sand existing between the small-diameter steel pipe (2) and the lateral connecting steel plate 21 is characterized in that to remove the earth and sand easily by spraying high pressure water to the soil. Non-removable tunnel excavation method According to claim 1, wherein the transverse connecting steel plate 21 is inserted into the insertion end portion 211 is formed at one end and the other end is opened so that the insertion end portion 211 of the other transverse connecting steel plate 21 is inserted Non-removable tunnel excavation, characterized in that the gripping end portion 213 for gripping with the insertion groove 212 is formed so that the insertion end portion 211 of the adjacent transverse connecting steel plate 21 is inserted and fixed. Way. Claim 6 was abandoned when the registration fee was paid. The transverse connecting steel plate (21) provided in the upper and lower portions of the small-diameter steel pipe (2) according to claim 1, before the upper slab (3) press-in operation carried out after removing the soil in the connecting steel plates (11, 21). The non-attached tunnel excavation method, characterized in that to release the bolt coupling. According to claim 1, After the concrete assembly wall 71 is disposed below each large diameter steel pipe 1 in the step of forming the concrete support wall, the lower end of the slab 3 and the upper end of the concrete assembly wall 71 Non-adhesive, characterized in that the concrete support wall (7) is formed by connecting the concrete after the reinforcing bars in the concrete assembly wall 71 and the concrete after the reinforcing bars connected to the concrete after the reinforcing bars. Tunnel Excavation Method According to claim 1, In the step of forming the concrete support wall, the prefabricated prefabricated concrete assembly wall 71 is disposed on the wall guide rail 61 of the base portion 6 and the concrete assembly wall 71 When pushed forward the non-adhesive tunnel excavation method, characterized in that the concrete assembly wall 71 is moved in the wall guide rail 61 and arranged in a row in order to form a concrete support wall (7) Constructed by the method according to claim 1, the ground reinforcement grouting layer is formed on the upper part of the tunnel, and the upper transverse connecting steel plates 11 and 21 are disposed, and the upper transverse connecting steel plates 11 and 21 are formed inside the tunnel. An upper slab 3 forming an upper part is disposed, and the upper slab 3 is supported by the concrete support wall 7 formed with the concrete assembly walls 71 in a row and integrally formed with the base 6. Tunnel structure Claim 10 was abandoned upon payment of a setup registration fee. 10. Tunnel structure according to claim 9, characterized in that the upper slab (3) is formed with a guide rail (32) to protrude slightly above the upper surface (3a) of the upper slab (3). Claim 11 was abandoned upon payment of a setup registration fee. 10. The method of claim 9, wherein the wall guide rail 61 is installed on the base portion 6 and the guide groove 711 is formed below the concrete assembly wall 71 is inserted into the wall guide rail 61 Tunnel structure characterized in that. Claim 12 was abandoned upon payment of a registration fee. The transverse connecting steel plates 11 and 21 are partially inserted such that an insertion end 211 for insertion is formed at one end and an insertion end 211 of the other transverse connecting steel plate 21 is inserted at the other end thereof. A gripping end portion 213 having an open insertion groove 212 formed therein is a tunnel structure, characterized in that the insertion end portion 211 of the adjacent transverse connecting steel plate 21 is connected and fixedly inserted. Claim 13 was abandoned upon payment of a registration fee. In the non-attached tunnel excavation method,  Two to five large-diameter steel pipes having a lateral connecting steel plate including a cover plate fixed thereon are arranged at a predetermined interval in the width direction of the tunnel from the height of the tunnel to be excavated, and the earth excavation is carried out in the longitudinal direction of the tunnel. And a small-diameter steel tube having a horizontal connection steel plate spaced apart from each other by a predetermined width between the large-diameter steel pipes fixed in the longitudinal direction of the tunnel and press-fitted to connect the large-diameter steel pipe to the transverse direction. And removing the earth and sand existing between the small diameter steel pipe and the transverse connecting steel plate, and installing the slab while pressing the upper slab of the tunnel manufactured between the transverse connecting steel plate from which the soil is removed. Recovering the small-diameter steel pipe, and press-installed so as to connect a plurality of earth pipe steel pipe up and down on both sides of the large diameter steel pipe below And excavating earth and sand between the earthen steel pipe and forming a foundation, forming a concrete support wall coupled with the slab and the foundation of the working tunnel, and a tunnel surrounded by the concrete support wall and the slab. Recovering the steel pipe for the retaining wall installed inside the concrete support wall while excavating, and placing the slab on the lower part of the excavated tunnel, combining with the base to complete the tunnel, characterized in that it comprises a Excavation method Claim 14 was abandoned when the registration fee was paid. Constructed by the method according to claim 13, the ground reinforcing grouting layer is formed on the upper part of the tunnel, and the upper transverse connecting steel plates 11 and 21 are disposed, and the upper transverse connecting steel plates 11 and 21 are formed inside the tunnel. An upper slab 3 forming an upper part is disposed, and the upper slab 3 is supported by the concrete supporting wall 7 formed with the concrete assembly wall 71 in a line and integrally formed with the foundation 6 and supported by the concrete. Tunnel structure, characterized in that the outer side of the wall (7) is embedded with vertically extending steel plate welded to the horizontally extending grid plate Claim 15 was abandoned upon payment of a registration fee. 10. The fixing means according to claim 9, wherein both upper slabs (3) are secured at a portion where the indented upper slabs (3) located on the upper part of the intermediate concrete support wall (7) serving as the central pillar of the tunnel meet. Tunnel structure characterized in that the bundle is integrated with (35)

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