KR100601399B1 - Messer shield excavator apparatus with separated messer plate and excavation method using the same - Google Patents

Abstract

According to the present invention, when constructing a underground tunnel having a predetermined cross-sectional size using a method shielded excavation device, a new method shield device cannot be installed by carrying a new method shield device into the underground tunnel when the bending direction is changed in the bent portion. In order to secure the space where the device can be installed, the width of the cross section of the underground tunnel should be widened in advance, and the message plate constituting the method shield excavation device is divided in the longitudinal direction, avoiding the conventional method of installing a new method shield device at the bend. By constructing step-by-step construction so that it can be combined with each other, the underground tunnel can be easily constructed by using the method shield device without widening the underground tunnel cross section, and the connection method of the present invention is connected to the method plate of the existing standard in the straight tunnel section. By adjusting the support gap, the air shortening The present invention relates to a method shielding excavation apparatus and a underground tunnel method using the same, which is possible and economical underground tunnel construction.

Method shield, underground tunnel, method plate

Description

Messer shield excavator apparatus with separated messer plate and excavation method using the same}

1A and 1B illustrate a construction conceptual diagram and a method shield drilling apparatus using a conventional method shield drilling apparatus,

Figure 1c is a construction conceptual diagram including a widening portion of the conventional bent portion (two places) and underground tunnel,

1D is a cross-sectional view of an underground tunnel including a conventional widening portion.

Figure 2a is a cross-sectional view of the installation of the method plate made of a conventional integrally installed jibo,

Figure 2b is a perspective view of the tip method plate of the present invention,

Figure 2c is a perspective view of the connecting method plate of the present invention,

Figure 2d is a cross-sectional view of the installation of the front end method plate and the connection method plate of the present invention,

Figures 2e and 2f is a plan view and a cutaway view of the connection of the connection of the front end method plate and the connection method plate of the present invention.

Figure 2g shows a cross-sectional view of the horizontal shaft excavated without widening by the method of the method shield excavation device of the present invention.

Figures 3a, 3b, 3c, 3d and 3e is a construction sequence diagram of the underground tunnel including the bent portion using the method of the method shield excavation device of the present invention.

<Description of Major Symbols in Drawing>

10: Zibo 20: The traditional method plate

30: propulsion means 40: curtain

50, 60b: Earth plate 60a: Wedge wood

70: 1 primary rehabilitation

80: Secondary Concrete Structure

100: conventional method shield excavator

200: method of the method shielding excavation device of the present invention

210: tip method plate 220: connection method plate

230: connection between the front end method plate and the connection method plate

The present invention relates to a method shielding excavation apparatus using a split method plate and an underground tunnel excavation method using the same. More specifically, when constructing underground tunnels with a predetermined cross-sectional size using a method shielded excavation device, when the direction of flexion is changed at the bend, new method shield devices cannot be brought in and installed inside the underground tunnel. In order to secure a space for the method shielding device, the width of the cross section of the underground tunnel should be widened in advance, and the mesh plate constituting the method shielding drilling device in the longitudinal direction can be removed from the conventional method of installing a new method shielding device in the bend. The present invention relates to a method for shielding a method and a method for underground tunneling using the same method for constructing underground tunnels using a method shielding device without widening the cross section of the middle tunnel.

Underground tunnel method (Messer shield method) using the conventional method of shielding excavation device excavates the ground while pressing the outer periphery of the excavation surface of the underground tunnel using the method plate, and after the ground hole is installed, the primary restoration is performed to stabilize the ground. And underground tunnel construction that installs necessary secondary structures (power ports, tunnels, etc.).

That is, in the excavation of the horizontal shaft (C) to form at least two places (A, B) of the vertical shaft and connect the vertical shafts as shown in Figure 1a, the excavation after initial drilling of the inlet of the oscillation work of the horizontal shaft (A) After installing the steel support ball 10 according to the shape of the cross-section, and a plurality of messer plates (20) are installed in parallel on the outer circumference of the support ball 10, the method plate 20 in the direction to be excavated It proceeds underground excavation while propelling and repeats the excavation process to install a new support ball at a certain interval (60cm ~ 80cm) and finally forms horizontal shaft (C) to the reach of the horizontal shaft (B). .

At this time, when the new membrane surface is formed by excavation while the method plate 20 is propelled by the propulsion means 30 such as a hydraulic jack as shown in FIG. 1B, the membrane membrane 40 is installed to support the membrane and additional support holes 10. The excavation process is repeated by installing) and the excavation and supporting work for underground tunnels is carried out to the final target point. At this time, the jibo and jibo are connected to each other using tie rods to stabilize the jibo ball and insert the earth plate (50, 60b) to fill the excavation surface between the jibo ball and the jibo ball, and the earth plate is closely adhered to the excavation surface at the top of the jibo ball. Install the wedge (60a) as possible to support the ground (bearing pressure, etc.) transferred from the ground in contact with the upper support, the ground support properly, and through the upper ground reinforcement grouting and primary recovery hole to stabilize the membrane, water treatment And ground subsidence. Thus, by forming a secondary concrete structure (electric bulb, culvert, etc.) of the cross section required for the excavation surface, the underground tunnel suitable for the purpose is finally completed. (The primary restoration hole 70 and the secondary concrete structure 80 are formed. See Fig. 1D, which is a cross-sectional view of the underground tunnel.

In underground excavation using such a method of shielding method, when the excavation direction of the horizontal shaft C is mixed with the straight portion C1 and the bent portion C2 as shown in Fig. 1C, it is different from the method shield excavation apparatus used in the straight portion. Separately, a new method of shielding is carried out to the new oscillating tool through the straight horizontal shaft which excavated the new method, and after installation of the method of shielding which is carried in the changed direction, additional underground excavation is performed.

However, there may be a case where it is impossible to install the method shielding excavation device in a new excavating direction due to the narrow working space formed in the bent part C2. In view of this, the method of the method is as follows. By expanding the excavation section excavated by the construction to secure the work space of the required bent portion (C2). However, such explosive excavation (C3) had a problem that eventually leads to unnecessary underground excavation.

In other words, the expansion of the meserplate in the explosive excavation (C3) part occurs, water leakage and ground subsidence occurs during the operation of the mesoplate excavation, not only the workability is greatly reduced, but also the support materials, earth plate, etc. required by the explosive excavation Due to the additional use, air and construction cost increase factors have to be increased, and above all, the safety of the membrane is not secured until the installation of a separate support hole for the explosive drilling part, and excavation is not formed without a constant cross-sectional shape. As the process progresses, the shape of the excavated cross section must be deformed, so that additional cross section reinforcement should be considered to cope with structural instability due to the stress imbalance on the cross section. Had a problem.

It is an object of the present invention to change the direction of excavation in underground tunnel excavation including the bent portion by the method of the shield method. Underground excavation is possible using the shield excavation device.

Another object of the present invention is that it is possible to underground excavation including the bent portion without expanding the additional excavation section, there is no need for the use of additional support material according to the widening excavation, to prevent leakage and ground subsidence due to the spreading of the method plate, modified excavation There is no problem of structural instability due to stress imbalance on the cross section, which enables efficient and economical underground tunnel excavation.                         

Another object of the present invention is to adjust the interval of the support hole when applied to the existing method plate is to shorten the air and to enable economic underground tunnel excavation.

The present invention is to solve the problems of the prior art as described above, by dividing the messer plate (messer plate) constituting the mesh shield excavation device in at least two or more longitudinal directions, not only in the straight part but also in the working oscillation opening of the bent part. Make it easy to install the plate.

In order to achieve the technical problem, a method of digging a method shield excavation apparatus using a split method plate and an underground tunnel excavation method using the same can be easily carried out by those skilled in the art. Preferred embodiments will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used for like elements.

Figure 2a is a cross-sectional view showing a case in which the conventionally manufactured method plater 100 is supported by the support hole 10, Figures 2b and 2c is a front end method plate constituting the method plate of the present invention 210 And a connecting method plate 220 in a perspective view, Figure 2d is a cross-sectional view of the method plate 200 of the present invention in a state where the front end method plate 210 and the connection method plate 220 are coupled to each other 2e and 2f illustrate a plan view and a cross-sectional view of the connecting portion 230 between the tip method plate and the connection method plate, and FIG. 2g without widening by means of the method of the method of the present invention. Excavation cross section of excavated horizontal shaft.

Figures 3a to 3e shows the underground excavation flow chart of the straight portion and the bent portion using the method shielding excavation apparatus using the split method plate of the present invention.

Method shielding excavation device 200 using the split method plate of the present invention

A tip meser plate 210 formed to a predetermined length so as to be installed in a new bending direction in the curved portion without widening the curved portion; It includes; and a connection mesoplate 220 coupled by a connector to the rear end of the front end method plate.

The front end method plate plate 210 of FIG. 2A is integrally manufactured as a method plate manufactured to a predetermined length according to the soil, the size of the excavation section, and the cross-sectional size of the oscillating tool of the bent portion, as shown in FIG. 2B. The length is approximately half that of

At one end of the method plater, at least two steel pipes are arranged in parallel (see FIG. 2F), and plate members connecting the steel pipes and plate members are generally stacked on top so as to secure the necessary rigidity when excavating. Since it is press-fitted into the ground to be formed in a wedge shape, the rear end is formed with a plurality of bolt holes 211 so that the connection method plate to be described later can be fastened with a connector such as a bolt, the lower part of the rear end is inserted into the connection method plate Block out portion 212 is formed to be.

As shown in FIG. 2C, the connecting meserplate 220 has a blockout portion 221 formed on an upper surface thereof so as to be fitted to a lower surface of the rear end portion of the front end meser plate 210 connected thereto. A plurality of bolt holes 211 corresponding to the bolt holes of the tip method plate are formed, and a connector such as a bolt penetrates the bolt hole and is fixed with a nut or the like so that the tip method plate and the connection method plate are coupled to each other. The rear end of the block-out portion 222 is formed at the bottom to accommodate the wedge and the upper support hole supported by the support.

In addition, when the block out part of the connection mesothore plate is manufactured, the elasticity decreases due to the heat of welding, and there is a problem when the earth plate is inserted due to deformation of the edge part due to external earth pressure or the like. Thus, a reinforcing plate 223 is formed for this purpose. Complement the thickness.

The connection part 230 in which the front end method plate and the connection method plate are coupled with a connector such as a bolt is overlapped with blockout parts 211 and 221 of the front end method plate plate 210 and the connection method plate 220 as shown in FIGS. 2D and 2E. Through the site is coupled by a connector 240, such as a plurality of bolts. Further, the side portion where the tip meserplate and the connecting mesplate are in contact with each other is welded 250 by fillet welding so as to be more securely coupled.

Underground tunnel of each straight portion (C1) of Figure 1b in the state where the front end method plate plate 210 and the connection method plate plate 220 of the present invention are coupled to each other by the connector 240 and the welding 250 as shown in FIG. Is excavated.

Referring to Figure 3 the method for excavating the underground tunnel including the bent portion using the method shielding apparatus 200 of the present invention,

First, the oscillation work tool linear part C1 of the vertical shaft 10 of FIG. 1C is excavated using the method shielding excavation apparatus of the present invention.

That is, in the vertical shaft of the oscillation tool as shown in FIG. 2g, the ground is excavated without connecting the installation of the ground hole and connecting the tip mesoplate and the connecting mesa plate as shown in FIG. 3a to proceed to the curved portion C2.

At this time, the installation interval of the jibo ball is determined in consideration of the length of the tip meserplate and the like. The method of the present invention is repeated to the bend by repeating the connecting method plate to the front end mesmer plate while bending the tip meser plate at the straight part. The shield rig is reached.

In the bending portion C2, the direction of the excavation is changed. When the direction of excavation is changed at a right angle as shown in FIG. 1B, the horizontal shaft is excavated in the new excavation direction by using a method shielding excavator reaching the bend and a separate method shielding device. Done. To this end, as shown in FIG. 3B, the flexure oscillation opening 400 is constructed, and the horizontal shaft is excavated in the new excavation direction from the flexure oscillation opening.

In the ground to be the horizontal gang inlet as shown in Figure 3c while the front end of the meser plate 210 of the present invention to the outer periphery of the new horizontal gang is installed while maintaining a constant interval. Since the tip meser plate of the present invention has a length easily formed from the oscillation work tool to the bent portion, it can be installed at the beginning of a horizontal shaft in a new drilling direction without widening the horizontal shaft.

Accordingly, as shown in FIG. 3D, the connecting method plate plate 220 of the present invention is connected to the rear end method plate plate 210 and is continuously supported in a new support hole. At this time, the connection is coupled to each other using a connector such as a bolt as shown in Figures 2d and 2e showing the connection between the front end meserplate and the connection methoder plate.

At this time, the installation interval of the support hole is formed to be a little narrow at the connection part of the method plate, and after the connection method plate is connected to form a little longer to adjust the installation interval of the support hole.

The method of driving the method shielding apparatus of the present invention, in which the installation of the method of the present invention is completed in the new drilling direction, continues as shown in FIG.

That is, as the new membrane is formed while driving the method shielding plate 200 coupled with the method plate and the connecting method plate, the membrane barrier 40 is installed while the support hole is continuously installed, and the earth plate 60b is exposed on the upper surface of the excavation. ) And the wedge (60a) and, if necessary, to prevent water and ground subsidence along the excavation surface through the grouting operation on the back of the support.

When the method shield device reaches the bend again, a new bend work tool is formed, and the new method is used to drill the method shield device in the desired direction, and finally the method shield device is pushed to the reach of the horizontal shaft. The underground tunnel will be completed.

Inside the underground tunnel, a secondary concrete structure having a required cross section may be installed, and a structure suitable for the purpose may be installed.

In addition, in the case of the straight section except for the bent portion and the bent portion, when connecting the connection meser plate of the present invention to the rear end of the existing method plate to excavate the underground tunnel, the construction space can be increased by increasing the installation space of the jibo hole more economically underground Tunnel section can be constructed.

By using the method shielded excavation apparatus of the present invention, it is possible to avoid unnecessary excavation section widening when underground tunnel work having a bent portion, and it is possible to install an unsupported and uneconomical excavation such as installation of a support hole for expansion, primary rehabilitation, rockfall, and excavation. It is possible to reduce the air, so it is possible to construct underground tunnels very economically and efficiently.In case of constructing by connecting the method plate to the existing method plate in a certain straight part, it is possible to efficiently control the installation interval of the support hole, which can reduce the air and required ground work. Economical underground tunnel construction is possible due to the reduction effect.

Claims (6)

In a method shielding excavation apparatus including a method plate The method plate includes a tip method plate and a connection method plate, The tip meser plate has a length smaller than the width of the tunnel constructed in the straight direction when the construction is bent in a new direction in the direction of straight drilling, the direction of bending in the bent portion without widening the width of the constructed tunnel A length is formed so as to be carried in and installed toward the rear surface, and a rear end portion of the front end mespoke plate is provided with a connection portion coupled to the connection mesopplate; The connection method plate is provided with a connection portion to be coupled to the connection portion of the front end method plater, The front end method plate and the connection method plate is characterized in that coupled to the connection portion, method shielding excavation apparatus using a split method plate that can be installed in the bend without expanding the excavation cross-section. delete The method of claim 1, The connecting part of the front end method plate is configured to block a part of the rear end of the leading method platelet, and the connecting part of the connecting method plate is configured to block a part of the front end part of the front end method plate, and the front end method plate and the connecting method plate Coupling with is characterized in that the block-out upper surface of the front end of the connection mesoplate is connected to overlap the block-out bottom surface of the rear end of the mesoplate to be coupled with a bolt, the construction possible for the construction of the bent section without widening the excavation section Method shielding device using method plate. 4. The method of claim 3, wherein a reinforcing plate is further formed in a distal end surface between the blocked-out bottom surface of the rear end portion of the connecting method plate and the blocked-out top surface of the tip portion. . Excavating the underground tunnel in a digging direction going straight using the method shield drilling equipment; And When the method of the mesoshield excavation device proceeds to the bent portion, the end of the meserplate is installed in the bent excavation direction while the support hole is installed in the bent excavation direction and the length is smaller than the width of the tunnel constructed in the straight excavation direction. Coupling a connection methoder plate having a connection part to a rear end of a method plate to be coupled to a connection part of the front end methoder plate by a connector; Excavating the underground tunnel by pushing the combined method of the shielding device in the bent direction without widening the width of the tunnel constructed in the digging direction before the bending; Including, the underground tunnel excavation method for excavating the underground tunnel by installing a method shield excavation device in the bend without widening the excavation section. delete

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