JP4814276B2 - Shield machine and tunnel construction method - Google Patents

Description

  The present invention relates to a shield machine capable of efficiently deforming a cross section of a tunnel and a tunnel construction method.

As a construction method of an underground structure, for example, a plurality of tunnels are excavated and formed in the ground with a shield machine having a substantially square cross section, and a plurality of the tunnels are arranged in parallel in an axial direction to connect and stop the water arbitrarily. It is known to construct an underground space by constructing a continuous structure having a shape and then excavating the inside of the continuous structure (see Patent Document 1).
Japanese Patent No. 2633026

  In such a construction method of an underground structure, a continuous structure having an arbitrary shape can be constructed. Therefore, for example, when used for construction of a branching / merging portion of a branching tunnel with respect to a main tunnel, an advantage can be utilized. On the other hand, since the branching tunnel has to be constructed in advance by connecting a plurality of tunnels, the longer the distance of the branching tunnel, the more disadvantageous in terms of construction period and construction cost.

  The purpose of the present invention is to construct a branch tunnel by excavating one tunnel, and by connecting and joining a plurality of tunnels at the junction / junction to the main tunnel, simplifying the joint construction, shortening the construction period, The object is to provide a shield machine and a tunnel construction method capable of reducing the construction cost.

(1) In order to achieve the above object, a shield machine according to the present invention includes a master machine shield machine that excavates and forms a tunnel having a predetermined cross section, and a plurality of slave machine shield machines that can start from the master machine shield machine. A shield machine having a machine,
The parent machine shield machine has a starting part of the plurality of child machine shield machines having a substantially trapezoidal shape in which the outer edge side is widened laterally on the outer peripheral part of the face plate for the parent machine to which a cutter bit is attached,
The slave unit shield machine enables the master unit shield machine to dig in a state in which each slave unit face plate is attached to a start part of the slave unit shield machine of the master unit face plate, and the master unit shield After the digging machine stops digging, the slave unit shield machine having a substantially trapezoidal shape corresponding to the starting part is assembled integrally with the corresponding slave unit face plate, and the slave unit shield machine of the master unit face plate is assembled. It is characterized by being able to start from the starting part.

  According to the present invention, a single tunnel is constructed by a parent machine shield machine in which a plurality of child machine face plates are attached to a parent machine face plate, and the parent machine shield machine is stopped at an appropriate position. The slave unit is assembled by attaching the slave unit body to the slave unit face plate in the master unit shield machine, and the slave unit is started from the start part of the slave unit shield machine of the master unit face plate. With the shield machine, it is possible to construct a tunnel having a different cross section from the tunnel constructed by the parent machine shield machine.

  Therefore, for example, the branch tunnel part is constructed by the main machine shield machine, the main machine shield machine is stopped with the branch tunnel approaching the main tunnel, and a plurality of child machine shield machines are started from there. Thus, it is possible to construct a branching / merging section by joining the tunnels of each slave unit shield machine and bringing them closer to the main tunnel.

In this case, even if the distance of the branching tunnel is long, the branching tunnel is formed by the construction of the tunnel with the main unit shield machine, so the connection between the tunnels with the sub unit shield machine is short and efficient. And rational construction can be performed.
Further, by forming the main body of the child machine shield machine into a substantially trapezoidal shape, the width of the connecting portion between the tunnels of the child machine shield machine can be shortened, and a more efficient tunnel can be constructed.
(2) In the present invention, the shield machine for each slave unit can perform a digging along the shape of the slave unit shield machine main body having a substantially trapezoidal shape after stopping the master shield machine. Moreover, a pair of cutter face plates can be positioned on both sides of the child machine face plate, and can be assembled integrally with the child machine shield machine main body.

(3) The tunnel construction method of the present invention is a tunnel construction method using a shield machine having a parent machine shield machine and a child machine shield machine of (1) or (2),
A step of constructing a tunnel corresponding to a cross section of the master unit by digging the master unit shield machine in a state in which each slave unit face plate is attached to a start part of the slave unit shield machine of the master unit face plate; ,
A step of assembling and integrating the child machine shield machine main body with the face plate for each child machine after stopping the master machine shield machine,
The assembled child machine shield machine is started from the start part of the child machine shield machine of the parent machine face plate, and a tunnel corresponding to the cross section of the parent machine is constructed following the tunnel corresponding to the cross section of the parent machine. Process,
It is characterized by including.

  According to the present invention, if the master unit shield machine is dug in a state where each slave unit face plate is attached to the start part of the slave unit shield machine of the master unit face plate, a tunnel corresponding to the cross section of the master unit is created. It can be built and a normal tunnel can be dug.

  In addition, the excavation by the slave unit shield machine is stopped by stopping the excavation by the master unit shield machine and starting the slave unit shield machine from the start part of the slave unit shield machine in the master unit shield machine. Will be able to.

In the construction of the tunnel by this child machine shield machine, it may be constructed as a plurality of branch tunnels, or may be constructed by connecting a plurality of tunnels.
(4) In the present invention, the tunnel constructed by the parent machine shield machine is a branching tunnel, and the tunnel constructed by the child machine shield machine is constructed by a plurality of child machine shield machines. Can be formed as a branching and converging widening part that merges with the main tunnel while excavating a natural ground inside the closed section.

  By adopting such a configuration, even if the distance of the branching tunnel is long, the branching tunnel is created by the construction of the tunnel by the parent machine shield machine, so the connection between the tunnels by the child machine shield machine is a short distance. In fact, efficient and reasonable construction can be performed.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1-12 is a figure which shows the construction method of the shield machine and tunnel concerning one embodiment of this invention.

  1-5 is a figure which shows the shield machine used in this Embodiment, FIG. 1 is the front view of the shield machine, and FIG. 2 is the longitudinal cross-sectional view.

  The shield machine 10 includes a master machine shield machine 12 for excavating and forming a tunnel having a predetermined cross section, and a plurality of, for example, six slave machine shield machines 14 that can be started from the master machine shield machine 12. Have.

  The parent machine shield machine 12 has a circular parent machine face plate 20 having a cutter bit 18 attached to the front surface of the parent machine shield machine machine body 16 having a circular cross section. By rotation of the circular parent machine face plate 20, The face can be excavated along the cross-sectional shape of the main machine shield machine main body 16.

  In the main machine shield machine main body 16, a drive motor 22 for rotating the main machine face plate 20, a shield jack 24, an erector 26 for segment assembly, a copy cutter 28 for curve construction, a bent jack 30 and the like are arranged. Has been.

  The base unit face plate 20 includes a plurality of, for example, six starter units 32 of the slave unit shield machine 14 formed through the outer peripheral portion. Each start unit 32 of the base unit face plate 20 has a cutter bit. It is in the state where the faceplate 34 for subunit | mobile_units with 33 is attached.

  And in the state which attached this base plate 34 for subunit | mobile_units, the base plate 20 for main | base station shield machine 12 is rotated with the drive motor 22 with the base plate 34 for subunit | mobile_units, It enables excavation.

  After the digging of the parent machine shield machine 12 is stopped, the child machine shield machine 14 places the machine body 36 (see FIG. 5) of the child machine shield machine 14 in the main machine shield machine 12 of the parent machine shield machine 12. And is integrated with each child device face plate 34 so as to be able to start from each starting portion 32 of the parent device face plate 20.

  In the slave unit shield machine main body 36 of the slave unit shield machine 14, a drive motor 38 for rotating the slave unit face plate 34, a shield jack 40, an segment assembly erector 42, and the like are disposed.

  Further, the excavator main body 36 has a substantially trapezoidal shape as shown in FIG. 4, and the slave unit face plate 34 has a pair of cutter face plates 44 driven by drive motors 38 on both sides thereof as shown in FIG. It is possible to perform excavation along the shape of the excavator main body 36.

  As shown in FIG. 7, the starting portion 32 of the base unit face plate 20 is formed in a substantially trapezoidal shape so that the excavator main body 36 can start.

  Further, the plurality of child machine shield machines 14 may independently construct six small-diameter tunnels after starting from the master machine shield machine 12, or alternatively, Several tunnels may be concatenated to construct a plurality of tunnels that are slightly larger than this. Furthermore, a main tunnel shield machine 12 may be used to construct a branch tunnel toward the main tunnel. It is also possible to construct a branching / merging portion for connecting six tunnels by the child machine shield machine 14 to one tunnel to connect the branching tunnel to the main tunnel.

  In particular, when the distance of the branching tunnel is long, the branching tunnel can be constructed in the same process as that in the case of constructing the tunnel by the ordinary circular shield machine with the master machine shield machine 12, so It is possible to reduce the time and cost required to connect each tunnel by the machine and to perform efficient and rational construction.

  Moreover, since the subunit | mobile_unit shield machine 14 is carrying out trapezoid shape, the connection width of a some tunnel can be made small and it can connect efficiently.

  Next, a tunnel construction method for constructing a branching tunnel and a branching / merging portion to the main tunnel using the shield machine as described above will be described with reference to FIGS.

  FIG. 6 is a plan view showing a state in which the main tunnel is connected from the branch tunnel through the branch / merging portion.

  In this tunnel construction method, first, the main tunnel 46 is excavated and formed by a shield tunneling machine (not shown) for the main tunnel.

  Next, a branching tunnel 48 is excavated and formed along the main tunnel 46 at a position spaced from the main tunnel 46 by a predetermined distance.

  In the excavation formation of the branching tunnel 48, as shown in FIG. 7, the master unit shield machine is provided with a plurality of slave unit face plates 34 attached to the master unit face plate 20 of the master unit shield machine 12. The digging is performed by rotating the face plate 20 for the main unit and the face plate 34 for the handset integrally with the drive motor 22 in the main body 16.

  In this case, when the number of digging times of the main machine shield machine 12 is 1, the assembly of the segments is performed, and the digging state is not different from that of a normal circular shield machine.

  While performing excavation in such an excavation state, the branching tunnel 48 is brought as close to the main tunnel 46 as possible.

  By constructing a branching tunnel in this way by the main unit shield machine 12, even when the distance of the branching tunnel 48 is long, a plurality of tunnels can be connected and a natural mountain surrounded by a plurality of tunnels can be excavated. However, it can be carried out by the same excavation work as a normal circular shield excavator, and the branch tunnel 48 can be constructed efficiently in a short time.

  Next, with the branching tunnel 48 approaching the main tunnel 46, the excavation of the main unit shield machine 12 is stopped, and a plurality of sub unit shield machines 14 are started from the main unit shield machine 12 to branch. A merging / widening section 50 is constructed from the main tunnel 48 toward the main tunnel 46.

  In this case, when the child machine shield machine 14 is started from the main machine shield machine 12, first, as shown in FIG. The chemical solution injection 52 is performed in a predetermined range from the inside of the excavator main body to the surrounding natural ground to take measures against water stop and earth pressure.

  Next, the devices in the main excavator body 16 are disassembled.

  After disassembling the equipment in the excavator body 16, as shown in FIG. 10, the slave unit starter 54 is assembled in the master unit shield machine main body 16, and the slave unit shield machine 19 is assembled. The child machine shield machine main body 36 is installed on the child machine starting frame 54.

  Next, the child machine face plate 34 is removed from the parent machine face plate 20, the child machine face plate 34 is connected to the child machine shield machine main body 36, and the child machine shield machine 14 is started by the parent machine shield machine 12. It is possible to start from the part 32.

  Then, as shown in FIG. 12, the child machine shield machine 14 is started by using the child machine reaction force receiver 56 and the partition wall 58 in the main machine shield machine.

  In this way, the plurality of child machine shield machines 14 are started from the respective start parts 32.

  As shown in FIG. 8, the plurality of slave shield machines 14 started from the respective start parts 32 are connected to the main tunnels 46 at predetermined intervals and joined between the tunnels 60 to form the outer shell body part 62. After the construction, the branching / merging portion 50 is completed by excavating and carrying out the inner soil surrounded by the outer shell housing portion 62.

  Thus, by joining the plurality of tunnels 60 to the main tunnel 46 while joining, the branching / merging portion 50 can be reliably formed along the shape of the main tunnel 46.

  The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.

  For example, in the above embodiment, the main unit shield machine and the slave unit machine are centered on a shield machine having a circular cross section. It can also be central.

It is a front view of the shield machine according to one embodiment of the present invention. It is a longitudinal cross-sectional view of the shield machine of FIG. It is a front view of a child machine shield machine. It is the rear view seen from the machine main body side of the child machine shield machine. It is a longitudinal cross-sectional view of a child machine shield machine. It is a top view which shows the state which connected the tunnel for a branch to the main line tunnel. It is a front view which shows the state which constructs | assembles the tunnel for a branch by the main | base station shield machine from the state of FIG. 6 in the main line tunnel. It is a front view which shows the state which builds a branch and merge part from the state of FIG. It is a longitudinal cross-sectional view which shows the chemical | medical solution injection | pouring for starting a main | base_unit shield machine, and the dismantling state in the main body of a sub-machine shield machine. It is a longitudinal cross-sectional view which shows the assembly state of the subunit | mobile_unit start stand and the excavator main body for subunit | mobile_units from the state of FIG. It is a longitudinal cross-sectional view which shows the connection state of an excavation machine main body and the face plate for subunit | mobile_units from the state of FIG. It is a longitudinal cross-sectional view which shows the start state of a subunit | mobile_unit shield machine from the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shield machine 12 Master machine shield machine 14 Child machine shield machine 16 Main machine machine body 18, 33 Cutter bit 20 Master machine face plate 32 Starting part 34 Child machine face plate 36 Child machine machine body 46 Main tunnel 48 Branch tunnel 50 Branch and junction

Claims (4)

A shield machine having a master machine shield machine for excavating and forming a tunnel having a predetermined cross section, and a plurality of slave machine shield machines made possible to start from the master machine shield machine,
The parent machine shield machine has a starting part of the plurality of child machine shield machines having a substantially trapezoidal shape in which the outer edge side is widened laterally on the outer peripheral part of the face plate for the parent machine to which a cutter bit is attached,
The slave unit shield machine enables the master unit shield machine to dig in a state in which each slave unit face plate is attached to a start part of the slave unit shield machine of the master unit face plate, and the master unit shield After the digging machine stops digging, the slave unit shield machine having a substantially trapezoidal shape corresponding to the starting part is assembled integrally with the corresponding slave unit face plate, and the slave unit shield machine of the master unit face plate is assembled. A shield machine that can be started from the starting part of the machine. In claim 1,
Each of the shield machine for each slave unit has a pair of cutter face plates so that after the stop of the master shield shield machine, the tunnel shield machine can be dug along the shape of the trapezoidal slave machine shield machine body. A shield machine which is located on both sides of the face plate for the slave unit and is integrated with the slave unit shield machine main body . A tunnel construction method using a shield machine having a parent machine shield machine and a child machine shield machine according to claim 1 or 2,
A step of constructing a tunnel corresponding to a cross section of the master unit by digging the master unit shield machine in a state in which each slave unit face plate is attached to a start part of the slave unit shield machine of the master unit face plate; ,
A step of assembling and integrating the child machine shield machine main body with the face plate for each child machine after stopping the master machine shield machine,
The assembled child machine shield machine is started from the start part of the child machine shield machine of the parent machine face plate, and a tunnel corresponding to the cross section of the parent machine is constructed following the tunnel corresponding to the cross section of the parent machine. Process,
A method for constructing a tunnel, comprising: In claim 3,
The tunnel constructed by the parent machine shield machine is a branching tunnel,
The tunnel constructed by the slave shield engraving machine is constructed by linking tunnels constructed by a plurality of slave shield shield machines to construct a closed cross-section tunnel, and excavating a natural mountain inside the closed cross-section. A method for constructing a tunnel, characterized in that the tunnel is formed as a branching merging widening section that merges with the merging section.

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