JP2010222838A - Master/slave shield machine and construction method for tunnel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield machine and a construction method for tunnel for excavating one tunnel when constructing a tunnel for branching and joining and constructing a plurality of tunnels in a branching-joining part from/with a main tunnel to simplify joining construction work, shorten a construction term, and reduce construction cost. <P>SOLUTION: In this master/slave shield machine having a master shield machine 12 for excavating and forming a tunnel having the predetermined cross section and a plurality of slave shield machines 14 capable of starting from the master shield machine, the master shield machine has a plurality of slave shield machine storage parts 32 and a plurality of master shield machine cutters 18 being rotated by a driving source arranged outside of the slave shield machine storage parts, and each slave shield machine can be stored in the slave shield machine storage part in the master shield machine and has a slave shield machine cutter 106 being rotated by a driving source arranged in the slave shield machine. By driving the master shield machine cutter and the slave shield machine cutter while each slave shield machine is stored, the master/slave shield machine 10 can excavate tunnel, and the slave shield machine can start from the slave shield machine storage part in the master shield machine after stopping excavation by the master/slave shield machine. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a parent-child 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 parent-child shield machine and a tunnel construction method capable of reducing the construction cost.

To achieve the above object, a parent-child shield machine according to the present invention includes a parent machine shield machine that excavates and forms a tunnel having a predetermined cross section, and a plurality of child machine shield machines that can start from the parent machine shield machine. A parent-child shield machine with
The parent machine shield machine has a plurality of child machine storage units and a plurality of parent machine cutters that are rotatable by a drive source arranged in addition to the child machine storage unit. A slave unit cutter that is capable of being stored in the slave unit storage unit of the master unit shield machine, and that can be rotated by a driving source disposed in the slave unit shield machine,
The parent-child shield machine can be digged by driving the parent machine cutter and the child machine cutter in a state where each child machine shield machine is housed in the child machine storage portion of the parent machine shield machine, The child machine shield machine can be started from the child machine storage portion of the parent machine shield machine after the machine machine is stopped.

  According to the present invention, a parent machine cutter and a child machine cutter are driven by a parent and child shield machine that stores a child machine shield machine in a plurality of child machine storage units provided in the parent machine shield machine. Build a tunnel, stop the parent-child shield machine at an appropriate position, and start the child machine shield machine from the parent machine shield machine in that state to drive the child machine cutter of the child machine shield machine to dig Thus, a tunnel with a variable cross section different from the tunnel constructed by the parent-child shield machine can be constructed by the child machine shield machine.

  Therefore, for example, by constructing a branch tunnel part with a parent-child shield machine, stop the parent-child shield machine with the branch tunnel approaching the main tunnel, and start a plurality of child machine shield machines from there, It is possible to construct a branching / merging section by connecting the tunnels of each slave shield machine to the main tunnel while joining them.

  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.

  In the present invention, each slave unit shield machine has a movable skin plate part that can be pushed forward, and when the slave unit shield starts, the movable skin plate part is pushed forward, and the slave unit shield machine An independent chamber can be made possible to form.

  By setting it as such a structure, the independent chamber of a subunit | mobile_unit shield machine can be easily ensured by advancing a movable skin plate part at the time of start of a subunit | mobile_unit shield machine.

  In the present invention, a seal material for sealing between the outer surface of the skin plate of each slave unit shield machine may be disposed in advance on the inner surface side of the slave unit storage part of the master unit shield machine. it can.

  By adopting such a configuration, a sealing material is provided on the inner side surface of the slave unit storage unit of the main unit shield machine, and this seal material ensures a gap between the skin plate of the sub unit shield machine and the sub unit storage unit. Can be sealed.

  In the present invention, when the parent-child shield machine is excavated, the parent machine cutter is arranged in front of or behind the child machine cutter so that the cutter can be rotated so as not to interfere with each other.

  By adopting such a configuration, it is possible to prevent the interference between both the parent and child machine cutters and to dig without affecting the storage and starting of the child machine shield machine.

  In this case, the parent machine cutter is formed in a spoke shape, and the spokes can be stopped at positions avoiding the positions of the respective child machine storage units when the parent-child shield machine is stopped.

  By adopting such a configuration, it is possible to further prevent the interference between the both parent and child machine cutters and to dig without affecting the storage and start of the child machine shield machine.

A tunnel construction method according to the present invention is a tunnel construction method using a parent-child shield machine having a parent machine shield machine and a child machine shield machine according to any one of the above,
In a state where each slave unit shield machine is housed in the slave unit storage part of the master unit shield machine, the master unit cutter and the slave unit cutter are driven to perform digging, corresponding to the cross section of the master unit shield machine. The process of building a tunnel,
After the digging of the parent-child shield machine is stopped, the child machine cutter of each child machine shield machine is driven to start the child machine shield machine from the child machine storage unit, and corresponds to the cross section of the parent-child shield machine Following the tunnel cross section, a step of constructing a tunnel corresponding to the cross section of the slave shield machine,
It is characterized by including.

  According to the present invention, if the parent machine shield machine is driven in the state where the child machine shield machine is stored in the child machine storage portion of the parent machine shield machine, the parent machine shield machine is driven, A tunnel corresponding to the cross section of the machine shield machine can be constructed, and a normal tunnel can be dug.

  In addition, by stopping the digging by the parent-child shield machine and driving the child machine shield machine by driving the child machine cutter from the parent machine shield machine, the digging by the child machine shield machine can be performed. .

  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.

  In the present invention, the tunnel constructed by the parent-child shield machine is a branching tunnel, and the tunnel constructed by the child machine shield machine connects tunnels constructed by a plurality of child machine shield machines. Thus, a tunnel with a closed cross section can be constructed and formed as a branching and converging widening portion that merges with the main tunnel while excavating a natural ground inside the closed cross 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.

It is a front view of the parent-child shield machine according to one embodiment of the present invention. It is a longitudinal cross-sectional view of the parent-child shield machine of FIG. It is sectional drawing which follows the III-III line of FIG. (1) is a cross-sectional view showing a state of the parent machine shield machine and the child machine shield machine when the parent machine shield machine is dug, and (2) is a parent machine shield machine and child machine when the child machine shield machine is started. It is sectional drawing which shows the state of a shield machine. (1) is a partially enlarged longitudinal sectional view of the child machine shield machine, and (2) is an enlarged sectional view of the sealed state. 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 builds the tunnel for a branch with a parent-child shield machine. It is a front view which shows the state which builds a branch and confluence | merging part from the state of FIG. It is a longitudinal cross-sectional view which shows the start preparation state of a subunit | mobile_unit shield machine. It is a longitudinal cross-sectional view which shows the start state of a subunit | mobile_unit shield machine from the state of FIG.

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

  1 to 10 are diagrams showing a parent-child shield machine and a tunnel construction method according to an embodiment of the present invention.

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

  This parent-child shield machine 10 includes a parent machine shield machine 12 that excavates and forms a tunnel having a predetermined cross section, and a plurality of, for example, five child machine shield machines 14 that can be started from the parent machine shield machine 12. Have

  The parent machine shield machine 12 has a bulkhead 20 having a parent machine cutter 18 attached to the front surface of the main machine shield machine body 16 having a circular cross section, so that the face is excavated by the rotation of the parent machine cutter 18. It has become.

  A plurality of master machine cutters 18 are arranged in the central part and the outer peripheral part of the partition wall 20, for example, one in the central part and two in the outer peripheral part.

  In the main unit shield machine main body 16, a drive motor 22 as a drive reduction for rotating the main unit cutter 18 respectively, a shield jack 24, an segment assembly erector 26, and the like are disposed.

  The main unit shield machine main body 16 includes a plurality of, for example, five sub unit storage portions 32 formed through the partition wall 20 at the front portion of the main unit shield machine main unit 16 so as to avoid the position of the main unit cutter 18. Is provided.

  The child machine shield machine 14 is attached to the child machine shield machine main body 102 that can be stored in each child machine storage portion 32 of the parent machine shield machine 12 and the front part of each child machine shield machine 14. It has a child machine cutter 106 which is disposed in front of the bulkhead 20 of the parent machine shield machine 12 and is rotatable by a drive motor 104 which is a drive reduction in the child machine shield machine body 102.

  In addition, in the child machine shield machine main body 102, a drive motor 104 for rotating the child machine cutter 106, a shield jack 110, an segment assembly erector 112, and the like are disposed.

  Then, in a state where each slave unit shield machine main body 102 is stored in the slave unit storage part 32 of the master unit shield machine 12, the master unit shield machine 10 can be engraved by driving the master unit cutter 18 and the slave unit cutter 106. After the digging of the parent-child shield machine 10 is stopped, only the child machine cutter 106 of the child machine shield machine 14 is driven, so that the inside of the child machine storage section 32 of the parent machine shield machine 12 is shown in FIG. More startable.

  In this case, each child machine shield machine 14 has the skin plate 114 of the child machine shield machine body 102 superposed on a part of the movable skin plate part 114A and the fixed skin plate part 114B as shown in FIG. As shown in FIG. 4 (1), the movable skin plate portion 114A is retracted to secure the shield chamber 28 of the parent-child shield machine 10 when the parent-child shield machine 10 is dug. When the excavator 14 starts, as shown in FIG. 4 (2), the movable skin plate portion 114A is advanced so that the shield chamber 116 of the slave shield excavator 14 can be secured.

  Thus, the skin plate 114 of the child machine shield machine main body 102 has a double structure, and when the parent child shield machine 10 is dug, the movable skin plate part 114A is moved backward so that the shield when the parent machine shield machine 10 is dug. The chamber 28 can be secured and the excavation by the main unit cutter 18 can be prevented from being interrupted. In addition, in the case of excavation by the slave unit shield machine 14, the movable skin plate portion 114A is advanced. Therefore, the shield chamber 116 for digging the child machine shield machine 14 can be easily secured.

  In this case, as shown in FIGS. 5 (1) and (2), a seal material 118 is disposed between the movable skin plate portion 114A and the fixed skin plate portion 114B, with respect to the fixed skin plate portion 114B. Even if the movable skin plate portion 114A moves, the fixed skin plate portion 114B and the movable skin plate portion 114A can be reliably sealed.

  Further, as shown in FIGS. 5 (1) and (2), the outer surface of the skin plate 114 of each child machine shield machine main body 102 is previously provided on the inner surface of the child machine storage part 32 of the parent machine shield machine 12. By disposing the sealing material 120 for sealing between the two, the sealing material 120 provided on the inner surface of the slave unit storage portion 32 of the master unit shield machine 12 ensures the skin plate of the slave unit shield machine main body 102. It is possible to seal between the outer surface of 114. .

  Furthermore, in the present embodiment, when the parent-child shield machine 10 is dug, the parent machine cutter 18 is located in front of the child machine cutter 106 with the child machine shield machine 14 stored in the parent machine shield machine 12. Or it is arranged behind and the cutter can be rotated so as not to interfere with each other.

  Specifically, in the present embodiment, the master machine cutter 18 is disposed at a position retracted from the slave machine cutter 106, thereby preventing interference between the two cutters 18 and 106, and It is possible to dig without affecting the storage and start of the machine shield machine.

  Further, when the master machine cutter 18 is formed in a spoke shape that can avoid the position of each slave machine storage unit 32, when the master machine shield machine 10 is stopped and the slave machine shield machine 14 is started, The spoke is stopped at a position avoiding the child machine storage portion 32 so as not to interfere with the started child machine shield machine 14.

  Specifically, as shown in FIGS. 1 and 3, the child machine shield machine main body 102 includes a child machine shield machine main body 102A having a substantially trapezoidal cross section and two child machine shield machine machines having a circular cross section. It consists of main body 102B, and the subunit | mobile_unit accommodating part 32 of the main | base station shield machine main body 16 is made into the shape corresponding to each subunit | mobile_unit shield machine main body 102A, 102B.

  The child machine shield machine main body 102A having a substantially trapezoidal cross section is provided with one large child machine cutter 106A and two small child machine cutters 106B, and the child machine shield machine main body 102B having a circular shape has one child machine. A cutter 106A is provided.

  In addition, the plurality of child machine shield machines 14 may be configured to independently construct six small-diameter tunnels after starting from the master machine shield machine 12, or alternatively, A plurality of tunnels may be connected to construct a plurality of tunnels that are slightly larger than this, and further, a tunnel for branching to the main tunnel may be constructed by the parent-child shield machine 10 and from there It is also possible to connect five tunnels by the child machine shield machine 14 to one tunnel and to construct a branch / merging portion that connects the branch 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 the case of constructing the tunnel by the ordinary circular shield machine in the parent-child shield machine 10, so the child machine shield machine Thus, it is possible to reduce the time and cost required for the connection work of each tunnel and perform efficient and rational construction.

  Further, since the three slave shield engraving machines 14 have a trapezoidal shape, the connection width of the plurality of tunnels can be reduced to perform efficient coupling.

  Next, a tunnel construction method for constructing a branching tunnel and a branching / merging portion to the main tunnel using the parent-child shield machine 10 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 this branching tunnel 48, as shown in FIG. 7, in a state in which a plurality of slave unit shield machine main bodies 102 are stored in the slave unit storage part 32 of the master unit shield machine 12, the master unit is stored. The parent-child shield machine 10 is dug by rotating the parent machine cutter 18 and the child machine cutter 106 by the drive motor 22 in the shield machine main body 16 and the drive motor 104 in the child machine shield machine main body 102.

  In this case, as shown in FIG. 4 (1), the movable skin plate portion 114A of the child machine shield machine 14 is moved backward to form the shield chamber 28 of the parent machine shield machine 10, and excavation is performed.

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

  By constructing the branch tunnel with the parent-child shield machine 10 in this way, even when the distance of the branch tunnel 48 is long, it is possible to connect a plurality of tunnels or excavate a natural ground surrounded by the plurality of tunnels. It can be carried out by the same excavation work as a normal circular shield excavator, and the branching tunnel 48 can be constructed efficiently in a short time.

  Next, with the branching tunnel 48 approaching the main tunnel 46, the digging of the parent-child shield machine 10 is stopped, and a plurality of child machine shield machines 14 are started from the parent machine shield machine 12, As shown in FIG. 8, the merging / widening portion 50 is constructed from the branch tunnel 48 toward the main tunnel 46.

  Next, as shown in FIG. 9, preparation for the start of the child machine shield machine 14 is performed.

  In this case, as shown in FIG. 4 (2), the movable skin plate portion 114A of the child machine shield machine 14 is moved forward to form the shield chamber 116 of the child machine shield machine 14 so as to be able to start.

  Then, as shown in FIG. 10, the child machine shield machine 14 is started.

  In this way, the plurality of slave machine shield machines 14 are started from the master machine shield machine 12.

  As shown in FIG. 8, the plurality of child machine shield machines 14 started from the individual child machine storage parts 32 are connected to the main tunnels 46 at predetermined intervals and joined between the tunnels 60 to form an outer shell body part. After the construction of 62, the branching / merging part 50 is completed by excavating and carrying out the earth and sand surrounded by the outer shell housing part 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.

10 parent machine shield machine 12 parent machine shield machine 14 child machine shield machine 16 parent machine shield machine body 18 parent machine cutter 20 bulkhead 28, 116 shield chamber 32 child machine storage unit 36 child machine shield machine body 46 main line tunnel 48 Branching tunnel 50 Branching / merging portion 102 Child machine shield machine main body 106 Child machine cutter 114 Skin plate 114A Movable skin plate portion 118, 120 Sealing material

Claims (7)

A parent-child shield machine having a parent machine shield machine for excavating and forming a tunnel having a predetermined cross section, and a plurality of child machine shield machines made possible to start from the parent machine shield machine,
The parent machine shield machine has a plurality of child machine storage units and a plurality of parent machine cutters that are rotatable by a drive source arranged in addition to the child machine storage unit. A slave unit cutter that is capable of being stored in the slave unit storage unit of the master unit shield machine, and that can be rotated by a driving source disposed in the slave unit shield machine,
The parent-child shield machine can be digged by driving the parent machine cutter and the child machine cutter in a state where each child machine shield machine is housed in the child machine storage portion of the parent machine shield machine, A parent-child shield machine, wherein the child machine shield machine can be started from a child machine storage portion of the parent machine shield machine after the machine has stopped excavating.     Each child machine shield machine has a movable skin plate part that can be pushed forward, and when the child machine shield starts, the movable skin plate part can be pushed forward to form an independent chamber of the child machine shield machine The parent-child shield machine according to claim 1, wherein   The sealing material which seals between the skin plate outer surfaces of each child machine shield machine is previously arranged on the inner surface side of the child machine storage part of the parent machine shield machine. The parent-child shield machine according to 2.   4. The cutter according to claim 1, wherein when the parent-child shield machine is excavated, the master machine cutter is arranged in front of or behind the slave machine cutter so that the cutter can be rotated so as not to interfere with each other. The parent-child shield machine described in Crab.   5. The parent-child shield according to claim 4, wherein the parent-machine cutter is formed in a spoke shape, and the spoke can be stopped at a position that avoids the position of each child machine storage unit when the parent-child shield machine is stopped. Digging machine. A method for constructing a tunnel using a parent-child shield machine having a parent machine shield machine and a child machine shield machine according to any one of claims 1 to 5,
In a state where each slave unit shield machine is housed in the slave unit storage part of the master unit shield machine, the master unit cutter and the slave unit cutter are driven to perform digging, corresponding to the cross section of the master unit shield machine. The process of building a tunnel,
After the digging of the parent-child shield machine is stopped, the child machine cutter of each child machine shield machine is driven to start the child machine shield machine from the child machine storage unit, and corresponds to the cross section of the parent-child shield machine Following the tunnel cross section, a step of constructing a tunnel corresponding to the cross section of the slave shield machine,
A method for constructing a tunnel, comprising:   The tunnel constructed by the parent-child shield machine is a branching tunnel, and the tunnel constructed by the child machine shield machine has a closed cross section by connecting tunnels constructed by a plurality of child machine shield machines. The tunnel construction method according to claim 6, wherein the tunnel construction method is formed as a branch merging widening portion that merges with a main tunnel while excavating a natural mountain inside a closed section.

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