JP4823040B2 - Segment transport system - Google Patents

Description

  The present invention relates to a segment transport system, and in particular, guides a transport track on a sleeper installed at the bottom of a tunnel pit having a circular cross section formed in shield construction, and transports a segment to a segment installation location by a transport carriage. The present invention relates to a segment transportation system.

  The shield method starts excavating ground with a cutter while pressing the cut end surface of the shield excavator with mud, muddy water, pressurized air, etc., and assembling a tunnel lining body with segments behind the shield excavator. It is a method of forming a tunnel in the ground from the vertical shaft to the final shaft, and is widely used as a main tunnel construction method in urban and plain areas.

  In shield construction in such a shield construction method, in addition to piping the excavated earth and sand pipes, etc. in the tunnel tunnel, the driving carriage, plant carriage, battery carriage, sending carriage following the shield excavator It is necessary to provide a trajectory for running and moving a follower truck such as a power distribution equipment truck, a transport truck for transporting the segment from the start shaft to the segment installation location, and the like.

  Here, the trajectory for traveling and moving the subsequent carriage, the carriage, etc. is by laying a pair of rails on the sleepers installed at the position corresponding to the strings at the bottom of the tunnel tunnel of the shield tunnel having a circular cross section. In particular, in the case of a small-diameter shield tunnel having an outer diameter of about 2000 mm and an inner diameter of about 1800 mm, for example, an operator stands on a scaffolding plate installed between a pair of rails. It is desirable to make the sleeper as small as possible so that the sleeper can be moved as it is, and to set the sleeper as low as possible at the bottom of the tunnel mine.

  When the sleepers are installed at the lowest possible position in the bottom of the tunnel mine, the segments transported from the start pit to the segment installation location via the transport track while being placed on the transport carriage are shields that move on the same track After being sent to the position of the follower truck of the excavator, it is necessary to pass these follower trucks to the location where the segment is installed, and various technologies have been proposed to enable smooth movement of such segments. (For example, refer to Patent Document 1).

In the method described in Patent Document 1 and the like in which the segment is transported to the position of the succeeding carriage of the shield excavator and then the segment is moved to the installation location by overtaking the succeeding carriage, the configuration and work process of the succeeding carriage and the carriage are complicated. At the same time, especially in the case of a shield tunnel with a small diameter, the gap between the periphery of the following carriage passing through the segment and the inner peripheral surface of the tunnel is narrowed, so that the size and shape of the segment are easily restricted. . In addition, special equipment such as a roller conveyor for transporting the segment to the succeeding carriage and a lift for dropping from the succeeding carriage are required. Furthermore, it becomes difficult for an operator to move beside the following carriage.
JP 2006-188907 A

  On the other hand, in general, a trail for a follower truck that travels a follower truck of a shield excavator and a transport track that runs a segment transport carriage are installed on sleepers and transported along the transport track. It is considered to move the carriage as it is so that the segment can be smoothly transported to the installation location by passing the side of the subsequent carriage.

  However, if the track for the follower carriage for running the follower carriage and the carriage track for running the segment carriage are provided on the sleepers, it is necessary to increase the length of the sleepers, and the sleepers at the bottom of the tunnel mine The installation height becomes high, and in the case of a shield tunnel with a small diameter, it is impossible to secure a space where an operator can move while standing above the sleepers. Therefore, it becomes difficult for an operator to move over a long distance ranging from several hundred meters to several kilometers, for example, from the start pit to the excavation site by the shield excavator, and the work efficiency also decreases.

  The present invention has been made paying attention to such a conventional problem, and allows the segment conveyed from the tunnel entrance side to pass smoothly through the side of the subsequent carriage to the installation location thereof. It is an object of the present invention to provide a segment transport system capable of ensuring a considerable space above sleepers and enabling a worker to move smoothly in a tunnel mine behind a succeeding carriage. .

The present invention guides a transport track on a sleeper installed at the bottom of a tunnel tunnel with a circular cross section formed in shield construction, and transports the segment from the wellhead side to the segment installation location near the shield excavator by the transport carriage. The segment transportation system of the main track part where the transportation track is laid alone in the center part of the bottom of the tunnel mine from the wellhead side toward the shield excavator side in the laying area of the transportation track, A trailer for a subsequent carriage for guiding a follower truck that is subsequently placed on a shield excavator and the transfer track are provided side by side, and the transfer track is arranged at a bottom one side portion in the tunnel mine, the main line portion, and the There is a route change including a portion that is interposed between the side portion and the conveyance track extends obliquely from the center portion of the bottom portion to the one side portion of the bottom portion in the tunnel mine. The main line part is installed at a position lower than the sleeper of the side part, and the length of the sleeper of the main part is shorter than the sleeper of the side part, and the sleeper of the main line part is installed at a position lower than the sleeper of the side part. A movement space for a worker having a predetermined height is secured above the plate member for movement laid on the sleeper of the sleeper. The step of the transport track caused by the difference in height is eliminated, and the transport track of the main line moves from the transport track of the main line portion to the transport track of the side portion. Is installed at the same height as the transport track of the side part, and the main line part carriage that is movable on the transport path of the main line part and the same height as the transport path of the side part Placed at the top of the main line truck A carriage having a two-stage structure, which is movable on a track for the transporting carriage, and includes the transporting carriage on which segments are placed, and at the boundary portion between the main line section and the route changing section, the transporting carriage is Provided is a segment transport system that eliminates a step of a transport track caused by a height difference between a sleeper of the main line unit and a sleeper of the side part by passing from the track for the transport carriage to the transport track of the route changing unit. This achieves the above object.

In addition, the present invention guides a transport track on a sleeper installed at the bottom of a tunnel pit with a circular section formed in shield construction, and transports the segment from the wellhead side to the segment installation location near the shield excavator by the transport carriage. A segment transportation system for carrying out the laying area of the transportation track from the wellhead side toward the shield excavator side, and the transportation track alone is laid at the center of the bottom of the tunnel mine, A side track for guiding a follower truck that is subsequently placed on the shield excavator and the transport track, and the transport track is disposed on one side of the bottom of the tunnel pit, and the main line portion And a portion where the conveyance track extends obliquely from the center portion of the bottom portion in the tunnel pit toward the one portion on the bottom portion. By dividing into a line change part, the length of the sleeper of the main line part is shorter than the sleeper of the side part, and the sleeper of the main line part is installed at a position lower than the sleeper of the side part, A moving space for workers having a predetermined height is secured above the plate member for movement installed on the sleepers in the main line section, and the transport carriage is connected to the sleepers in the main line section and the annex by means of a step eliminating means. The step of the transport track caused by the height difference from the sleeper is eliminated, and the transport track of the main line moves from the transport track of the main line to the transport track of the side part. The transport track is installed at the same height as the transport track of the side section, and the transport track of the main line section in a portion adjacent to the route change section is moved from the height position of the transport path of the main section to the side of the side section. Tilt toward the height of the transport track A sleeper of the main line part by passing the transport carriage from the gradient track to the transport path of the route change part at a boundary portion between the main line part and the route change part. The above object is achieved by providing a segment transport system that eliminates the level difference of the transport track caused by the difference in height between the sleeper and the sleeper of the side part .

  According to the segment transport system of the present invention, the segment transported from the tunnel entrance side can be smoothly moved to the installation location thereof by passing the side of the subsequent carriage, and most of the total length of the tunnel In the tunnel mine behind the succeeding carriage, a considerable space can be secured above the sleepers to enable the worker to move smoothly.

  A segment transport system according to a preferred embodiment of the present invention is a shield excavator using a transport carriage 12 for transporting a segment 11 transported from a wellhead side of a tunnel 10 in shield construction by a shield method as shown in FIG. A sleeper 16 that supports the transport track 15 that travels the transport carriage 12 is moved to the installation location of the segment 11 immediately after 13 and in the main line portion A of the tunnel mine 14 that will be described later, behind the shield excavator 13. A considerable space above is secured so that smooth movement of the worker can be ensured.

  That is, in this embodiment, the shield method is a known shield method such as a muddy water pressurization method, a mud pressurization method, and the like. For example, the segment is a steel segment having an outer diameter of about 2000 mm and an inner diameter of the rib of 1800 mm. A small-diameter shield tunnel 10 having a small diameter is constructed. In such a small-diameter shield tunnel 10, the work space in the tunnel mine 14 is narrow when performing shield work, and the segment 11 is shielded by a shield excavator. Since it is difficult to efficiently transport to the installation location immediately after 13, it is possible to move to the installation location of the segment 11 by devising the arrangement position of the transport track 15 that travels the transport carriage 12 that transports the segment 11. Of a considerable length (for example, a main part of the tunnel mine 14) In main line portion A of 100m~ about several miles), in order to smooth the movement of personnel is not inhibited, it is obtained by employing the segment conveying system of the present embodiment.

  As shown in FIGS. 2 to 6, the segment transport system according to the present embodiment is also configured to transport tracks 15 on sleepers 16 and 17 installed at the bottom of a tunnel pit 14 having a circular cross section formed in shield construction (see FIG. 5, and FIG. 6), and a system for transporting the segment 11 from the wellhead side to the segment installation location in the vicinity of the shield excavator 13 by the transport carriage 12. The main track A in which the transport track 15 alone is laid at the center of the bottom of the tunnel mine 14 toward the shield excavator 13 side, and the track for the subsequent carriage that guides the subsequent carriage 18 that is disposed subsequent to the shield excavator 13. 19 and the transport track 15 are disposed between the main part A and the joint part B, where the transport track 15 is disposed on one side of the bottom of the tunnel pit 14 and the main part A and the joint part B. The transport track 15 is partitioned into a route changing portion C including a portion extending obliquely from the center portion of the bottom portion of the tunnel mine 14 toward the one side portion of the bottom portion (see FIGS. 1 and 2), and the sleepers 16 of the main portion A are By keeping the length shorter than the sleepers 17 of the side B (see FIGS. 5 and 6), the sleepers 16 of the main line A are installed at positions lower than the sleepers 17 of the side B, so that A worker's movement space of a predetermined height (a height higher than the height at which the worker can stand upright or slightly lean) can be placed above the moving plate-like member 21 installed on the sleeper 16. In addition, the conveyance carriage 12 eliminates the level difference of the conveyance track 15 caused by the height difference between the sleepers 16 of the main line A and the sleepers 17 of the side B by the level difference eliminating means, It moves to the transport track 15 of the annex B ( 3, see FIG. 4).

  Moreover, in this embodiment, as shown in FIG.3 and FIG.4, the level | step difference elimination means installs the conveyance track | orbit 15 of the route change part C in the same height as the conveyance track | orbit 15 of the side part B, and main line part A. The main line truck 12a that can move on the transport track 15 of the main line section A, and the transport carriage that is disposed at the same height as the transport track 15 of the side section B and is attached to the upper part of the main line truck 12a. It is carried out by a two-stage cart that includes a transport carriage 12 on which segments are mounted, which can move on the trajectory 20 for transportation, and at the boundary between the main line section A and the route change section C, the transport carriage 12 is moved to the transport carriage track. By transferring from 20 to the transport track 15 of the route change section C, the step of the transport track 15 caused by the height difference between the sleepers 16 of the main line section A and the sleepers of the side section B is eliminated.

  In this embodiment, the sleepers 16 and 17 are made of, for example, H-shaped steel or groove-shaped steel, and as shown in FIGS. 5 and 6, the longitudinal direction is the axis of the tunnel 10 at the bottom of the tunnel pit 14 having a circular cross section. In addition to being arranged perpendicularly to the direction, both ends are supported and fixed to the inner peripheral surface of the tunnel by the already installed segment 11 'using fixing bolts or the like, so that it is arranged at the height position of the string corresponding to its width. It is attached in a simple beam shape. That is, the sleeper 16 attached to the main line A has a length of about 1000 mm, for example, so that the attachment surface of the upper surface of the transport track 15 is about 850 mm from the center of the tunnel 10. Installed. Further, the sleeper 17 attached to the side part B has a length longer than that of the sleeper 16 having a length of about 1700 mm, for example, so that the attachment surface of the transport track 15 on the upper surface is the center of the tunnel 10. To be about 550 mm high. As a result, a height difference of, for example, about 300 mm is generated between the sleepers 18a installed in the main line A and the sleepers 18b installed in the side B, and the transport track laid on the upper surfaces of these sleepers 16, 17 15 also has a height difference of about 300 mm, for example.

  In the present embodiment, in the route changing unit C, a sleeper 17 ′ having the same length as the sleeper 17 installed in the side part B is used, and this sleeper 17 ′ is a sleeper installed in the side part B. 17 and the transport track 15 laid on the upper surface of the sleeper 17 'is also installed at the main line A by being installed at the same height as the transport track 15 of the annex B. A level difference of about 300 mm, for example, is generated between the transfer track 15 and the transport track 15.

Further, these sleepers 16, 17, and 17 'are installed at regular intervals, for example, at a pitch of about 1000 mm in the axial direction of the tunnel 10 in the main line part A, the side part B, and the route change part C. The transport track 15 is laid so as to extend in the axial direction of the tunnel 10 while being supported by 16, 17, 17 ′.

  The conveyance track 15 is composed of a pair of rail members 15a and 15a, and these rail members 15a and 15a are arranged in parallel with a center interval of about 600 mm, for example, and fixed to the sleepers 16, 17, and 17 ′. A transport track 15 for moving the transport carriage 12 is configured. Further, in the space between the pair of rail members 15a, 15a, the sleepers 16, 17, 17 'are supported by the sleepers 16, 17, 17', for example, the steel scaffolding plate 21 is used as a plate member for movement. By installing it on top, for example, it is possible to form a passage for a worker to move.

  In the present embodiment, the main line A in which the transport track 15 is laid alone at the center of the bottom of the tunnel mine 14 is the total length of the tunnel mine 14 formed from the entrance side of the start shaft to the shield excavator 13 side. In the main line A, as described above, the sleeper 16 is installed at a low position in the central portion of the bottom of the tunnel pit 14, and preferably above the sleeper 16. A moving space of a height that allows an employee to walk upright is secured (see FIG. 5).

  The side part B where the follower truck track 19 and the transport track 15 for guiding the follower truck 18 disposed subsequent to the shield excavator 13 are provided is, for example, an area of about 10 to 50 m behind the shield excavator 13. In the annex B, as described above, the long sleeper 17 is arranged at a position higher than the sleepers 16 of the main line A at the bottom of the tunnel mine 14, thereby transporting the track 19 for the subsequent carriage. Sufficient width is secured to install the track 15. Further, in the side part B, the transport track 15 is arranged so as to be shifted toward the bottom one side portion of the tunnel pit 14, and the pair on the opposite side is disposed in parallel with the transport track 15. The track 19 for subsequent carriages comprising the rail members 19a, 19a is installed.

  Note that the transport track 15 and the follower carriage track 19 in the side part B are the front part of the space between the shield excavator 13 and the follower carriage 18 as the tunnel 10 is excavated by the shield excavator 13. The sleepers 17 are attached to the rails, and the rail members 15a, 15a and 19a, 19a are sequentially laid forward while being added. Further, the follower carriage track 19 is long enough to place the follower carriage 18 that moves forward as the shield excavator 13 advances so as to be movable behind the shield excavator 13. For example, the rear carriage track 19 in the rear portion which is laid to a length of about 10 m and becomes unnecessary due to the forward movement of the subsequent carriage 18 is performed every predetermined span described later. When the route change section C is replaced, it is sequentially removed.

  The route change section C interposed between the main line section A and the side section B is, for example, an area of about 15 to 20 m. In this route change section C, as described above, the long sleeper 17 ′ Is placed at a position higher than the sleepers 16 of the main line A at the bottom of the tunnel mine 14, so that the transport track 15 of the route change unit C is installed at the same height as the transport track 15 of the side B (see FIG. 3). Moreover, in this route change part C, the conveyance track 15 is laid in a planar shape including a part extending obliquely from the bottom center part of the tunnel pit 14 toward the bottom one side part. The transport track 15 and the transport track 15 of the side part B are connected in a plane (see FIG. 3).

  In the present embodiment, the length of the follower carriage track 19 left behind the follower carriage 18 in accordance with the excavation work of the tunnel 10 by the shield excavator 13 corresponds to the length of the route change section C, for example. For example, when the length is about 10 m, such a length is set as one span, and the subsequent carriage track 19 and the conveyance track 15 of the portion where the subsequent carriage track 19 is left are temporarily removed, and the route change unit C Is moved forward by one span, and a setup change operation is performed to extend the main line A forward by one span.

  In the present embodiment, the two-stage cart that constitutes the step eliminating means together with the transport track 15 of the route changing unit C installed at the same height as the transport track 15 of the side part B is shown in FIGS. As shown in FIG. 4, a main line carriage 12 a having a length of, for example, about 220 cm, which is provided continuously in the axial direction of the tunnel 10 and is movable along the transport track 15 of the main line A, and the main line It consists of three transport carts 12 having a length of, for example, about 200 cm, which can move along a transport cart track 20 attached to the upper portion of the partial cart 12a. In addition, a battery locomotive 22 that is disposed behind the transport carriage 12 (toward the tunnel entrance) and pushes the transport carriage 12 forward (to the shield excavator) is installed on the track 20 for the transport carriage.

  A carriage having a two-stage structure in which the segment 11 is placed on the transport carriage 12 and each transport carriage 12 and the battery locomotive 22 are temporarily fixed on the carriage 20 of the main carriage 12a at intervals. Is moved toward the shield excavator 13 side from the tunnel entrance side of the tunnel 10 through the transport track 15 of the main line portion A laid at the bottom center portion of the tunnel tunnel 14. When the two-stage cart reaches the boundary between the main line part A and the route change part C, the temporary fixing of the transport carriage 12 and the battery locomotive 22 is released and the battery locomotive 22 is driven to provide three transport carts. 12 is pushed out to the route change part C side. As a result, the transfer carriage 12 on which the segment 11 is placed is transferred from the transfer carriage track 20 installed at the same height as the transfer track 15 of the route change section C to the route change section C. It is possible to easily eliminate the step of the transport track 15 caused by the height difference between the sleepers 16 of the main line A and the sleepers 17 of the side B through the part C.

  In addition, the transport carriage 12 on which the segment 11 delivered to the route change section C is placed travels along the transport track 15 of the side section B having the same height as the route change section C, so that the follower truck track 19 is moved. Therefore, the segment 11 can be smoothly transported to the installation location immediately after the shield excavator 13.

  That is, according to the segment transport system of the present embodiment, the sleeper 16 of the main line section A and the side section are provided by an inexpensive step eliminating means that devise the arrangement position of the transport track 15 and use only a two-stage cart. It becomes possible to eliminate the difference in height from the sleeper 17 of B, and the segment 11 transported from the tunnel entrance side of the tunnel 10 is continuously transported in the main line part A, the route change part C, and the side part B. On the other hand, the side of the succeeding carriage 18 can be passed and smoothly moved to the installation location. In addition, in the main line A that occupies most of the entire length of the tunnel mine 14 behind the trailing carriage 18, a considerable space is secured above the sleepers 16 so that workers can move smoothly. Can do. Furthermore, since the sleepers 16 of the main line A are short, less material is required, and the fulcrum intervals of the sleepers 16 are shortened, so that the sleepers 16 having low strength can be used.

  Further, in the present embodiment, the transport carriage 12 that moves to the side section B is installed on the transport carriage track 20 of the main carriage 12a as the upper stage portion of the two-stage carriage. Since the sleepers 16 and the transport track 15 are installed at low positions, the main line truck 12a and the transport track 15 are installed for laying water pipes or the like after the excavation work by the shield machine 13, for example, is completed. As a result, it becomes possible to save the labor for replacing the track. That is, for example, as shown in FIGS. 7A to 7C, when a transport carriage 24 such as a water pipe 23 is required in the construction after the excavation work, the sleepers 16 and the tracks 15 of the main line A are The height and width necessary for laying the water pipe 23 and the like are set at the time of installation, and the main line truck 12a and the main line truck 12a and The transport track 15 can be effectively used as the transport cart 24 or the like.

  FIG. 8 illustrates the main part of a segment transport system according to another embodiment of the present invention. In the embodiment of FIG. 8, the step eliminating means for eliminating the step of the transport track 15 caused by the height difference between the sleepers 16 of the main line A and the sleepers 17 of the side B is provided between the main line A and the side B. The transport track 15 is inclined and extends obliquely from the bottom center portion of the tunnel mine 14 toward the bottom one side portion (see FIG. 2). The transport track 15 of the route change unit C is connected to the transport track 15 of the main line A. Conveying cart having a single stage structure at the boundary portion between the route change unit C and the side part B, which is configured by the gradient path 25 inclined from the height position toward the height of the transport path 15 of the side part B. 12 is transferred from the gradient track 25 to the transport track 15 of the side B, so that the height difference between the sleepers 16 of the main line A and the sleepers 17 of the side B is eliminated. Here, the inclination of the gradient track 25 is preferably 3% or less, and by setting it to 3% or less, it is not necessary to provide the rack and pinion mechanism in the transport carriage 12.

  FIG. 9 illustrates the main part of a segment transport system according to still another embodiment of the present invention. In the embodiment of FIG. 9, the step eliminating means for eliminating the step of the transport track 15 caused by the difference in height between the sleeper 16 of the main line part A and the sleeper 17 of the side part B includes the transport path 15 of the route changing part C. The transport track 15a of the main line A is installed at the same height as the transport track 15 of B and the transport track 15a of the main line A in the part adjacent to the route change unit C is moved from the height position of the transport track 15 of the main line A It is constituted by a gradient track 26 that inclines toward a height position of 15, and at the boundary portion between the main line portion A and the route change portion C, the one-stage transport carriage 12 is moved from the gradient track 26 to the route change portion C. The height difference between the sleepers 16 of the main line part A and the sleepers 17 of the side part B is eliminated. Here, the inclination of the gradient track 25 is preferably 3% or less, and preferably 3% or less, as in the embodiment of FIG. 8, so that it is not necessary to provide a rack and pinion mechanism in the transport carriage 12. Become.

  The segment transportation system of FIG. 8 or FIG. 9 also provides substantially the same operational effects as the segment transportation system of the above-described embodiment, and the sleeper 16 of the main line A and the side B of the main line A can be realized with a simpler and less expensive configuration. It is possible to eliminate the level difference of the conveyance track 15 caused by the height difference from the sleepers 17.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the present invention can be applied to shield construction for constructing shield tunnels of various other diameters other than a shield tunnel having a small diameter having an outer diameter of about 2000 mm and an inner diameter of about 1800 mm. it can. Further, for example, as shown in FIG. 10, the sleeper of the side part B can be used as a sleeper 27 of a drop-down type to facilitate the movement of the worker in the side part B.

It is a principal part longitudinal cross-sectional view explaining the shield construction to which the segment conveyance system which concerns on preferable one Embodiment of this invention is applied. It is a principal part top view explaining the structure of the segment conveyance system which concerns on preferable one Embodiment of this invention. It is a principal part longitudinal cross-sectional view explaining the structure of the segment conveyance system which concerns on preferable one Embodiment of this invention. It is a principal part longitudinal cross-sectional view explaining the structure of the segment conveyance system which concerns on preferable one Embodiment of this invention. It is a principal part cross-sectional view of the main line part explaining the structure of the segment conveyance system which concerns on preferable one Embodiment of this invention. It is a principal part cross-sectional view of the side part explaining the structure of the segment conveyance system which concerns on preferable one Embodiment of this invention. Explaining the situation where the transport carriage and the transport track are effectively used as facilities for laying water pipes, (a) is a cross-sectional view during segment transport, (b) is a cross-sectional view during water pipe transport, (C) is a longitudinal cross-sectional view at the time of water pipe conveyance. It is principal part sectional drawing explaining the structure of the segment conveyance system which concerns on other preferable embodiment of this invention. It is principal part sectional drawing explaining the structure of the segment conveyance system which concerns on further another preferable embodiment of this invention. It is sectional drawing which illustrates the other form of the sleeper in a side part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Tunnel 11 Segment 12 Carriage trolley 12a Main line truck 13 Shield excavator 14 Tunnel pit 15 Transport track 15a A part adjacent to the route change part of the transfer track 16 Main line sleepers 17 Side sleepers 17 'Route change part 18 Subsequent carriages 19 Trajectory for subsequent carriage 20 Trajectory for transfer carriage 21 Steel scaffolding plate (plate member for movement)
22 Battery loco 23 Water pipe 24 Carriage cart 25, 26 Gradient track 27 Sleeping type A sleeper A Main line part B Additional part C Route change part

Claims (2)

A segment transport system that guides a transport track on a sleeper installed at the bottom of a tunnel pit with a circular cross section formed in shield construction, and transports the segment from the wellhead side to the segment installation location near the shield excavator by the transport carriage Because
The laying area of the transfer track is disposed following the shield excavator, with a main line portion where the transfer track is laid alone at the center of the bottom of the tunnel mine from the wellhead side toward the shield excavator side. A follower carriage track for guiding a follower carriage and the transfer track are provided side by side, and the transfer track is disposed on the bottom one side portion of the tunnel pit, and interposed between the main line portion and the adjacent portion. The transfer track is divided into a route changing portion including a portion extending obliquely from the bottom center portion in the tunnel mine toward the bottom one side portion,
The length of the sleeper of the main line part is shorter than that of the side part of the sleeper, and the sleeper of the main line part is installed at a position lower than the sleeper of the side part of the sleeper. While securing a movement space for workers of a predetermined height above the plate member for movement,
The transport carriage moves from the transport track of the main line to the transport track of the side part by solving the level difference between the sleeper of the main line part and the sleeper of the side part by using a step eliminating means. Is supposed to
The level difference canceling means sets the transport track of the route changing unit at the same height as the transport track of the side part, and the main line unit that can move the main line unit on the transport track of the main line unit A two-stage structure comprising a carriage and the transportation carriage on which a segment is placed, which is arranged on the same height as the transportation track of the side section and is movable on a transportation carriage track attached to the upper part of the main line carriage. And by transferring the transport carriage from the transport carriage track to the transport track of the route change section at the boundary portion between the main line section and the route change section. A segment transport system that eliminates a step in a transport track caused by a difference in height from the sleepers of the side part . A segment transport system that guides a transport track on a sleeper installed at the bottom of a tunnel pit with a circular cross section formed in shield construction, and transports the segment from the wellhead side to the segment installation location near the shield excavator by the transport carriage Because
The laying area of the transfer track is disposed following the shield excavator, with a main line portion where the transfer track is laid alone at the center of the bottom of the tunnel mine from the wellhead side toward the shield excavator side. A follower carriage track for guiding a follower carriage and the transfer track are provided side by side, and the transfer track is disposed on the bottom one side portion of the tunnel pit, and interposed between the main line portion and the adjacent portion. The transfer track is divided into a route changing portion including a portion extending obliquely from the bottom center portion in the tunnel mine toward the bottom one side portion,
The length of the sleeper of the main line part is shorter than that of the side part of the sleeper, and the sleeper of the main line part is installed at a position lower than the sleeper of the side part of the sleeper. While securing a movement space for workers of a predetermined height above the plate member for movement,
The transport carriage moves from the transport track of the main line to the transport track of the side part by solving the level difference between the sleeper of the main line part and the sleeper of the side part by using a step eliminating means. Is supposed to
The step eliminating means installs the transport track of the route change section at the same height as the transport track of the side section, and transfers the transport track of the main line section in a portion adjacent to the route change section to the main track section. It is configured by a gradient track that is inclined from the height position of the transfer track toward the height position of the transfer track of the side part, and the transfer carriage at the boundary portion between the main line unit and the route change unit A segment transport system that eliminates a step in the transport track caused by a difference in height between the sleepers of the main line and the sleepers of the annex by transferring from the gradient track to the transport track of the route change unit .

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