JP5439342B2 - Tubular member embedding method and underground track system used in the method - Google Patents

Description

  The present invention relates to a track through which a vehicle for transporting materials and the like for lining the inner wall of an excavation mine excavated by a shield excavator passes, and particularly covers a small-diameter excavation mine for embedding a tubular member. Concerning construction.

  The shield method is used to form a small-diameter excavation pit necessary for laying sewerage facilities. In the shield method, for example, laying of sewerage facilities is performed by two processes of primary lining and secondary lining. The primary lining is a work of assembling steel or reinforced concrete segments to form a pit inner wall while proceeding with shield excavation. In the secondary lining, a strong plastic pipe or the like (for example, an FRPM pipe, a steel pipe, or a cast iron pipe) is inserted into the excavation pit after the primary lining, and mortar (or This is the work of laying sewer pipes by injecting foamed mortar. Such a two-stage construction has a problem that the construction period is long because each construction requires a construction period, and a problem that the track apparatus must be laid and removed in each construction.

  In Patent Document 1, a subsequent carriage arrangement section A used for primary lining, a rail relocation completion section C used for secondary lining, a subsequent carriage arrangement section A, and a rail relocation completion section C are connected. A track section having a slope section B having an inclination for the purpose has been proposed. In this construction method, the primary lining track and the secondary lining track can be obtained by replacing the track relocation completion section C across the ramp section B according to the passage of the subsequent carriage following the shield machine. Can be laid at the same time, so that work efficiency and construction period can be shortened.

  However, the ramp section B has a problem that it uses a specially shaped ramp sleeper with only the top flange tilted so that the rails are inclined and laid, and a long section is required so that the underground transport vehicle can travel smoothly. (Patent Document 1, paragraph 0019).

  On the other hand, Patent Document 2 proposes a sleeper having a main plate that is in surface contact with the inner surface of a segment and a rail that is placed on the main plate in secondary lining. According to this sleeper, the effective diameter of the space in which work is performed can be increased, and the worker can easily walk.

  However, since the method of Patent Document 2 cannot reduce the height of the track, the effective diameter for installing a strong plastic pipe or the like does not increase effectively, and the track is removed in the secondary lining. Was still necessary.

JP 11-336500 A JP 2006-342574 A

  However, all of the above-mentioned prior arts only devise the structure of track sleepers, and the viewpoint of improving the entire track device (track and sleepers) suitable for the shield method for forming a small-diameter excavation mine. Has not been studied.

  The present invention was created to solve the above-described conventional problems, and an object thereof is to provide a technique for improving the shield method.

  Hereinafter, effective means for solving the above-described problems will be described while showing effects and the like as necessary.

Means 1. In order to embed a tubular member in the ground, an underground track system used for movement of a follower carriage of a shield excavator and transportation of goods in a mine for burying the tubular member,
Of the excavation section in which the inner wall is formed by the excavator, it is provided in the face section of a predetermined length from the head, and is used for the movement of the first material transport track used for transporting the material and the subsequent carriage. A first track on which the first material transport track and the follower track are fixed side by side through the first sleepers,
A second material transport track that is provided in all sections of the excavation section and is used to transport the material; and a second sleeper that fixes the second material transport track to the inner wall of the mine, and in the face section A second track arranged at a position closer to the bottom of the inner wall than the first sleeper;
A connecting track device that is movable on the second material transport track, and that absorbs and connects a difference in height between the first material transport track and the second material transport track and a lateral shift;
With
The connection track device includes a first connection track connected to the first material transport track, a second connection track connected to the second material transport track, the first connection track and the second connection. An intermediate connection track that connects the track, a first connection hinge that rotatably connects the first connection track and the intermediate connection track in a horizontal plane, and the second connection track and the intermediate connection track in a horizontal plane. And a second connecting hinge that is rotatably connected to the underground track system.

  In the first track of the means 1, the track for the subsequent carriage used for the movement of the subsequent carriage of the shield excavator in the primary lining, and the first material conveyance track used for transporting the material such as excavation residue and materials, Are arranged side by side, a relatively long first sleeper is required. On the other hand, in the 2nd material conveyance track | truck used also for secondary lining, since only the 2nd material conveyance track | truck used for material conveyance is required, a comparatively short 2nd sleeper is enough. . As a result, the second material transport track can transport a tubular member having a diameter larger than the excavation diameter after the completion of the primary lining, and the work space for the secondary lining in the excavation hole and A wide laying space can also be secured.

  On the other hand, the 1st material conveyance track and the 2nd material conveyance track are connected by the connection track device which moves on the 2nd material conveyance track. If a movable connecting track device is used, the connection of the track can be easily maintained by advancing the connecting track device while removing the first material transport track in the passing section following the advance of the shield excavator. it can. The connecting track device includes a first connecting member, a second connecting member, an intermediate connecting member, a first hinge that rotatably connects the first connecting member and the intermediate connecting member, and a second connecting portion and an intermediate connection. Since it has the 2nd hinge which connects a part so that rotation is possible, even if the excavation hole is curving, the connection of a track can also be maintained simply and smoothly. As a result, only the second material transporting track suitable for the secondary lining can be left at the same time as the completion of the primary lining, so that the time required for removal of the track and the laying time can be reduced.

Mean 2. The second sleeper is
A curved portion that is curved in a direction along the circumferential direction of the inner surface of the mine inner wall;
A pair of projecting portions provided to be spaced apart from each other by the same distance from each of both end portions of the bending portion toward the center position of the bending portion;
Have
The second material transport track includes a cross section composed of a first plate portion and a second plate portion bent at right angles to each other, and the second material transport track surface is formed on an upper surface. The underground track system according to claim 1, wherein the first plate portion is placed on the curved portion, and the second plate portion is in contact with the protruding portion.

  The means 2 is durable because the second track device including a cross section composed of a first plate portion and a second plate portion bent at right angles to each other provides a track surface for supporting the wheel. It is possible to realize a downhole track apparatus without using an expensive track rail that is highly reusable. On the other hand, the two second track members are in contact with the two engaging members welded to the surface of the curved portion on the curvature center side, and the curved portions are welded to the respective back surfaces of the track surface. A structure that allows a load to flow through the inner surface of the hole can be realized in a compact manner. Thereby, an effective laying space for laying the tubular member can be enlarged without using the rail for the track.

  The present inventor, contrary to the conventional technical common sense that a highly durable and expensive rail must be used for the raceway surface that supports the wheel, a raceway member (other than the raceway rail) (instead of the raceway rail) For example, inexpensive L-shaped steel) is used. The use of such a race member is a problem of wear and deformation according to conventional common sense. However, according to the experiments of the present inventors, such a track member has a sufficient durability if it is used for the purpose of transporting excavated soil and materials, and performing a tunnel construction of several kilometers only once. It was confirmed to have. The present invention is configured based on a very original idea that is contrary to the common sense of the prior art that the track member is changed from the rail for track to L-shaped steel in the middle of the track.

  According to the present invention, it is possible to embed without removing the track device in the secondary lining by two features of “possibility of using inexpensive steel materials” and “realization of effective laying space”. it can. As a result, it is possible to shorten the construction period by eliminating the removal work of the track device, and realize a construction method that is also favorable to the environment by eliminating the generation of waste material due to the removal work of the track device for secondary lining. can do. Furthermore, since the height of the raceway surface with respect to the inner surface of the excavation hole can be reduced, it is possible to realize a configuration in which the slipping steel wheel is not easily toppled even if derailed.

Means 3. The connecting track device slides on the second material transport track surface, slides on the second material transport track surface, and slides on the second material transport track surface. An intermediate support part for supporting the second material transporting track surface, and a second support part for supporting the second connection track,
The first support portion includes a first parallelism regulating portion that maintains parallelism of the first connection track with respect to the first material transport track by being sandwiched between the first material transport tracks.
The second support portion has a second parallelism regulating portion that maintains parallelism of the second connection track with respect to the second material transport track by sandwiching the second material transport track from the outside.
The second connection track extends from the second parallelism restricting portion toward the center of the second material transport track and forms a common surface with the inner surface of the second material transport track. Orbit system.

  In the means 3, the connection track device is configured to slide and move on the second material transport track surface, so that the connection position can be easily moved (advanced). The first support portion has a first parallelism restricting portion that maintains parallelism with respect to the first material transporting trajectory, and reliably maintains parallelism with the first material transporting trajectory even when the connecting track device is moved forward. Therefore, smooth traveling of the underground transport vehicle train 80 can be realized. Since the first parallelism restricting portion can maintain the parallelism by being sandwiched between the first material transport tracks, the first material transport track is disposed at a position shifted from the center of the excavation pit to the side. Even if it is, it can prevent reliably interference with a pit inner wall.

  The second support portion has a second parallelism restricting portion that maintains parallelism with respect to the second material transporting track, and reliably maintains parallelism with the first material transporting track even when the connecting track device is moved forward. This is common with the first support portion. However, the 2nd parallelism control part is constituted so that the parallelism to the 2nd material conveyance track may be maintained by pinching the 2nd material conveyance track from the outside. Such a structure can implement | achieve formation of the surface which is extended from the 2nd parallelism control part to the center side of a 2nd material conveyance track | truck, and is common with the inner surface of a pair of 2nd material conveyance track | orbit. Thereby, a continuous surface can be formed by the second material transport track and the second connecting portion in the vicinity of the surface in contact with the wheel.

Means 4. The second sleeper is provided with a predetermined interval in the curved portion, and has a pair of upright portions that rise upward.
The track structure according to means 2 or 3, wherein the first plate portion is placed on an upper end portion of the upright portion.

  In the means 4, the support portions are straight portions extending toward the center of curvature parallel to the center line that connects the center position in the circumferential direction of the bending portion and the center of curvature of the bending portion. It can be manufactured only by bending and composition processing of bending. Further, since the straight portion is connected via the curved portion and the bent portion, the vertical load from the L-shaped track portion is efficiently transmitted as a linear compressive load from the bent portion to the inner surface of the excavation hole. be able to.

Means 5. A method of excavating the ground with a shield excavator using the underground track system according to any one of means 1 to 4, and embedding a tubular member in the excavated excavation hole,
In the front of the shield excavator, a track laying step of laying the first material transport track, the second material transport track, and the subsequent carriage track,
An excavator advance step of advancing the shield excavator while excavating by the shield excavator;
In a state in which the second material transport track remains, a track removal step of removing the first material transport track and the subsequent carriage track in the section after passing through the shield excavator,
A connecting track step of advancing the connecting track device using the second material transport track to connect the second material transport track and the first material transport track;
A tubular member carrying step of carrying the tubular member into the excavation hole using the second material carrying track;
An embedding step of embedding the tubular member and the second material transporting track in the excavation hole;
A tubular member embedding method comprising:

The longitudinal cross-sectional view which shows the structure of the sewer construction system of embodiment. AA sectional view showing composition of a sewer construction system of an embodiment. The longitudinal cross-sectional view which shows the state which the shield excavation system 70 advanced. BB sectional drawing which shows the structure of the sewer construction system of embodiment. The perspective view which shows the structure of the lower stage track apparatus 50 of embodiment. The front view which looked at the lower track apparatus 50 of embodiment in the excavation direction. Sectional drawing which shows the state which the secondary lining of embodiment completed. The perspective view which shows the structure of the connection track apparatus 30 of embodiment. The perspective view which shows the connection state of the lower stage connection unit 31 and the lower stage track apparatus 50. FIG. The perspective view which shows the installation state to the lower track members 55 and 56 of the upper stage connection unit 33. FIG. The perspective view which shows the upper stage connection adapter 36 of this embodiment. The perspective view which shows the intermediate | middle connection adapter 38 of this embodiment. The flowchart which shows each process of sewer construction of embodiment. The flowchart which shows each process of the primary lining of embodiment. The flowchart which shows each process of the secondary lining of embodiment.

  Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

(Configuration of shield excavation system of embodiment)
Drawing 1 is a longitudinal section showing the composition of the sewer construction system of an embodiment. The sewer construction system includes a shield excavation system 70, an underground transport vehicle train 80, and a track structure 60. The shield excavation system 70 is a system that forms a pit wall 95 by excavating the underground and assembling a plurality of segments S in the excavated pit. The underground transport vehicle train 80 includes a battery locomotive 81 that is tow-driven by a battery, a material cart 82 that supplies the segment S to the shield excavation system 70, and a transport vehicle 83 that transports the excavated soil. The track structure 60 includes an upper track member 11 for moving the underground transport vehicle train 80 in the shaft, and a track for a subsequent carriage (described later) for moving the subsequent carriage of the shield excavation system 70.

  Subsequent carriages of the shield excavation system 70 include a mud pressure shield 71 for excavating the ground with a cutting blade, an operation carriage 73, a power supply carriage 74, a control board carriage 75 for controlling the shield excavation system 70, and a shield excavation system. A hydraulic power source carriage 76, a transformer carriage 77, and a cable reel carriage 78 on which a hydraulic power source as a power source 70 is mounted are included. The mud pressure shield 71 is also called a shield excavator or an excavator.

  An operator gets on the trolley 73 to operate the shield excavation system 70. The control panel carriage 75 controls the shield excavation system 70 in accordance with the operation of the operator. The cable reel carriage 78 stores a power cable and a communication cable that connect the power carriage 74 and the ground. The transformer cart 77 converts the voltage and supplies power to the power supply cart 74. The power truck 74 supplies power to the shield excavation system 70. The mud pressure shield 71 includes a belt conveyor 72 that transports the excavated residual soil to the transport vehicle 83.

  Drawing 2 is an AA sectional view showing composition of a sewer construction system of an embodiment. The trailing carriage track 20 is fixed to the upper sleeper 17. The trailer track 20 provides a track for the trailer of the shield excavation system 70 to advance in the mine. To the following carriages 73, 74, 75, 76, 77, 78, traction ropes (not shown) are fastened between the carriages. Accordingly, the mud pressure shield 71 can pull the subsequent carriages 73, 74, 75, 76, 77, 78 on the track provided by the subsequent carriage track 20. The upper sleeper 17 is also called a first sleeper.

  The control panel carriage 75 has wheels 75d that roll on a single-rail trailing carriage track 20. The control panel carriage 75 has a movable sled 75c having a columnar shape having an axis extending in a direction parallel to the subsequent carriage track 20, and an arm portion 75b that supports the movable sled 75c. The movable sled 75c supports the control panel carriage 75 on the track 20 for the following carriage, which is a single rail, from the side of the inner wall 95. On the other hand, a tilt stop 95 s is disposed on the pit inner wall 95 with a slight gap from the control trolley 75 so that the control trolley 75 does not fall toward the center of the pit inner wall 95. The other subsequent carriages 73, 74, 76, 77, 78 have the same configuration as the control panel carriage 75.

  The follower carriage track 20 is extended forward in order by being added to the front of the driving carriage 73 as the mud pressure shield 71 is advanced by excavation. On the other hand, at the rear of the cable reel carriage 78, the following carriage track 20 does not need to exist and can be dismantled and removed. The dismantled follower truck track 20 can be used to extend the track in front of the driving carriage 73. This is because the shield excavation system 70 generally does not reverse. In this way, the trailing carriage track 20 itself is used to advance the shield excavation system 70 by moving substantially forward (shifting in order).

  The upper track member 11 provides a track for transporting materials (for example, segments and auxiliary materials) of the underground transport vehicle train 80 and excavation residual soil. The material is mounted on the transport vehicle 83 that has arrived at the bottom of the vertical hole T2 from the ground using the crane device 91. The transport vehicle 83 can be transported to the vicinity of the mud pressure shield 71 by being driven (pressed) by the battery locomotive 81 and moving on the track of the upper track member 11.

  On the other hand, the material cart 82 is pulled by the battery locomotive 81 to move on the track of the upper track member 11 and to move below the excavated soil discharge port 72a (see FIG. 1) of the belt conveyor 72. Can do. The material cart 82 carries the excavated residual soil discharged from the excavated soil discharge port 72a, and conveys it on the track of the upper track member 11 to the vertical hole T2. As a result, the excavated residual soil can be pulled up by the crane device 91. The crane apparatus 91 may be configured to lift the material cart 82 itself and turn the material cart 82 on the ground to lower the excavated soil on the ground.

  The trailing carriage track 20 and the upper track member 11 are fixed side by side on an upper sleeper 17 formed of a single straight H-shaped steel. The upper track member 11 includes a pair of rails, that is, a left rail 11a disposed on the left side in the excavation direction, and a right rail 11b disposed on the right side in the excavation direction. The upper track member 11 is also called a first material transport track.

  A lower track device 50 having a common track width with the upper track member 11 is provided below the upper sleeper 17. After the shield excavation system 70 passes, the lower track device 50 is exposed upward and can be used by removing the upper track member 11, the follower cart track 20, and the upper sleeper 17. The upper track member 11, the lower track device 50, and the following carriage track 20 extend in parallel to each other.

  Drawing 3 is a longitudinal section showing the state where shield excavation system 70 advanced in the sewer construction system of an embodiment. Drawing 4 is a BB sectional view showing the composition of the sewer construction system of an embodiment. This figure shows a state in which the lower track apparatus 50 is exposed and usable behind the shield excavation system 70 by the advancement of the shield excavation system 70. The lower track device 50 is also called a second material transport track.

  In the excavation pit T1, a segment S is assembled to form a pit wall 95. Such construction is called primary lining. The excavation pit T1 is divided into a primary lining completion section Z1, a secondary lining possible section Z2, and a transition section Z3 according to the configuration of the track structure 60. The primary lining completion section Z1 is a section in which the lower track device 50, the upper track member 11, and the subsequent carriage track 20 are provided. In the secondary lining-capable section Z2, the upper track member 11, the following carriage track 20, and the upper sleeper 17 are removed, and the lower track device 50 is exposed, so that a wide work space (moving space or laying space) is secured. This is a section where secondary lining is possible. The transition section Z3 is an inclined section in which the upper track member 11, the following carriage track 20, and the upper sleeper 17 are removed, and the connecting track device 30 that connects the upper track member 11 and the lower track device 50 is installed. . The primary lining completion section Z1 is also called a face section.

  FIG. 5 is a perspective view illustrating a configuration of the lower track apparatus 50 according to the embodiment. FIG. 6 is a front view of the lower track device 50 according to the embodiment as seen in the excavation direction. The lower track device 50 includes a lower sleeper 51 and a pair of lower track members 55 and 56. The lower sleeper 51 includes a curved portion 54a that is curved in a direction along the circumferential direction of the inner surface of the inner wall 95, a pair of bent portions 54b and 54c, a pair of standing portions 54d and 54e, and positioning members 53a and 53b. It has. The lower sleepers 5 are also called second sleepers. The positioning members 53a and 53b are also called a pair of protrusions.

  The lower sleepers 51 are formed by bending a metal flat plate by bending to form a curved portion 54a, and by bending the pair of bent portions 54b and 54c to form a pair of standing portions 54d and 54e, positioning members 53a and 53b. It is manufactured by welding. The positioning members 53a and 53b are provided so as to be separated from each of the pair of bent portions 54b and 54c forming both ends of the curved portion 54a by the same distance toward the center position of the curved portion 54a.

  The lower track member 55 is manufactured by cutting, in the longitudinal direction, an L-shaped steel including a cross section composed of a first plate portion 55a and a second plate portion 55b that are bent at right angles to each other. It is welded to the sleepers 51. The first plate portion 55a is welded to the upper end portion of the standing portion 54d. The second plate portion 55b is welded to the positioning member 53a. On the other hand, the lower track member 56 is manufactured by cutting, in the longitudinal direction, an L-shaped steel including a cross section composed of a first plate portion 56a and a second plate portion 56b that are bent at right angles to each other. The lower sleepers 51 are welded. The first plate portion 56a is welded to the end portion of the standing portion 54e. The second plate portion 56b is welded to the positioning member 53b. The upper surfaces of the first plate portion 55a and the first plate portion 56a are also referred to as second material transport track surfaces.

  Since the lower track device 50 has a simple configuration that does not use a general rail member, the height from the bottom of the pit inner wall 95 can be lowered, so that a wide working space is secured in the excavation mine T1. Can do. Thereby, the lower stage track apparatus 50 can carry in the reinforced plastic pipe | tube 98 embed | buried in the excavation mine T1 in the excavation mine T1. In other words, since the lower track apparatus 50 can effectively use the inner diameter of the excavation mine T1, the inner diameter of the digging mine T1 is reduced with respect to the outer shape of the reinforced plastic pipe 98 to reduce the amount of excavation. be able to.

  Drawing 7 is a sectional view showing the state where the secondary lining of the embodiment was completed. In the present embodiment, the secondary lining is a construction for embedding the reinforced plastic pipe 98. The reinforced plastic tube 98 is fixed to the underground wall 95 in the excavation shaft T1 by the foamed mortar layer 97. The foamed mortar layer 97 is obtained by curing an embedded material that is foamed concrete injected between the inner wall 95 and the reinforced plastic pipe 98. As a result, the secondary lining of the sewerage work has been completed.

  As can be seen from FIG. 7, the lower track device 50 is embedded in the foamed mortar layer 97 without being discarded on the ground. Further, as described above, the trailing carriage track 20 is reused every time the shield excavation system 70 advances by moving substantially forward itself, as described above. Therefore, it is possible to remarkably reduce the material. Thereby, not only the material required for track laying can be significantly reduced, but also the environmental load resulting from the disposal of the material accompanying the laying or removal of the track can be significantly reduced.

FIG. 8 is a perspective view illustrating a configuration of the coupled track device 30 according to the embodiment. The connecting track device 30
A lower connection unit 31, an intermediate connection unit 32, an upper connection unit 33, a lower connection hinge 34, and an upper connection hinge 35 are provided. The lower connection unit 31 is equipped with a pair of lower connection track members 31 a and 31 b to be connected to the lower track device 50. The upper connection unit 33 is equipped with upper connection track members 33 a and 33 b to be connected to the upper track member 11. The intermediate connection unit 32 is equipped with intermediate connection tracks 32a and 32b for connecting the lower connection track members 31a and 31b and the upper connection track members 33a and 33b. The upper connection track members 33a and 33b are also called first connection tracks. The lower connection track members 31a and 31b are also called second connection tracks.

  The lower connection hinge 34 connects the lower connection track members 31a and 31b and the intermediate connection tracks 32a and 32b so as to be rotatable in a horizontal plane. The intermediate connection tracks 32a and 32b are connected to the pair of lower connection track members 31a and 31b with gaps 32e and 32f, respectively. The clearances 32e and 32f are clearances provided so as not to interfere with each other due to the rotational movement of the lower connection track members 31a and 31b and the intermediate connection tracks 32a and 32b.

  The upper connection hinge 35 connects the upper connection track members 33a and 33b and the intermediate connection tracks 32a and 32b so as to be rotatable in a horizontal plane. The intermediate connection tracks 32a and 32b are connected to the pair of upper connection track members 33a and 33b with gaps 32c and 32d, respectively. The clearances 32c and 32d are clearances provided so as not to interfere with each other due to the rotational movements of the upper connection track members 33a and 33b and the intermediate connection tracks 32a and 32b.

  FIG. 9 is a perspective view showing a connection state between the lower connecting unit 31 and the lower track device 50. The lower connection unit 31 includes lower connection members 31a and 31b, lower support members 31c and 31d that slide on the lower track members 55 and 56 to support the lower connection track members 31a and 31b, and lower parallelism regulation. Parts 31e and 31f. The lower parallelism restricting portions 31e and f can maintain the parallelism of the lower connecting track members 31a and 31b with respect to the lower track members 55 and 56 by sandwiching the lower track members 55 and 56 from the outside. The lower support portions 31c and 31d are also called second support portions. The lower parallelism restricting portions 31e and 31f are also called second parallelism restricting portions.

  The lower parallelism restricting portions 31e and 31f can be easily fastened to the standing portions 54d and 54e with a bullman or the like as a fastening tool. Thereby, for example, it is possible to prevent a situation in which the lower connecting track members 31a and 31b are displaced from the lower track device 50 when the wheels 75d pass. However, the position of the connecting track device 30 in the track direction is limited to the jump position (the position where the stand portions 54d and 54e are present) in the track direction of the standing portions 54d and 54e.

  The lower support portion 31c is configured to extend from the lower parallelism regulating portion 31e to the center side of the lower track member 55 and to have a surface 31i that is common to the inner surface 55f of the lower track member 55. The lower stage support part 31d has a symmetrical configuration with the lower stage support part 31c. The lower connecting track members 31a and 31b have a shape in which the height decreases (the cross-sectional thickness decreases) as the end portions 31j and 31k approach each other. The lower support portions 31c and 31d have shapes such that the height decreases as they approach the inner corner portions 31g and 31h. Thereby, the smooth connection of the track to the lower track members 55 and 56 is realized.

  FIG. 10 is a perspective view showing an installation state of the upper connection unit 33 on the lower track members 55 and 56. The upper connection unit 33 includes upper connection track members 33a and 33b and an upper support portion 33c that slides on the lower track members 55 and 56 and supports the upper connection track members 33a and 33b. The upper stage support part 33c includes a pair of sled parts 33d and 33e, upper stage parallelism restriction parts 33f1 and 33f2, and a connecting arm 33g. The pair of sled portions 33d and 33e are members for smoothly sliding the upper support portion 33c on the lower track members 55 and 56. The movement of the coupling track device 30 can be easily realized by the battery locomotive 81 being pulled to the excavation side by the coupling arm 33g. The pair of sled portions 33d and 33e are connected to respective planes for sliding on the lower track members 55 and 56 on the lower surface of the upper support portion 33c. The upper support part 33c is also called a first support part.

  The upper parallelism restricting portions 33f1 and 33f2 are members that maintain the parallelism of the upper connecting track members 33a and 33b with respect to the upper track member 11 during the movement of the upper support portion 33c. The maintenance of the parallelism is realized by the upper parallelism regulating portions 33f1 and 33f2 being sandwiched between the lower track members 55 and 56. The upper parallelism restricting portions 33f1 and 33f2 can automatically perform positioning in the left-right direction with the upper track member 11.

  As a result, the upper connecting unit 33 can be smoothly moved by being pulled by the battery locomotive 81, and the positional relationship and parallelism with the upper track member 11 are automatically adjusted. A predetermined gap may be provided between the upper parallelism restricting portions 33f1 and 33f2 and the inner sides of the lower track members 55 and 56, and another member for smooth sliding may be attached.

  FIG. 11 is a perspective view showing the upper connection adapter 36 of the present embodiment. The upper connection adapter 36 is an adapter that forms a track in the gap between the upper connection track members 33 a and 33 b and the upper track member 11 and connects them. A gap is generated between the upper connecting track members 33a and 33b and the upper track member 11 because the position of the connecting track device 30 is limited to the jumping position by the position of the lower sleeper 51, and the upper connecting track members 33a and 33b. This is because the position cannot be finely adjusted to the position of the upper track member 11.

  The upper connection adapter 36 can be manufactured by processing a mold member having a C-shaped cross section. The upper connection adapter 36 includes a pair of parallel plate portions 36a and 36c and a plate portion 36b perpendicular to the pair of plate portions 36a and 36c. A pair of parallel plate portions 36a and 36c are connected by a vertical plate portion 36b. In the present embodiment, an adapter (not shown) having a shape symmetrical to the upper connection adapter 36 is also used.

  The plate portion 36c is formed with inclined surfaces 36d and 36e formed so that the thickness decreases toward the end portion in the track direction. The plate portion 36b is formed with inclined surfaces 36f and 36g that are formed so that the thickness decreases toward the end in the track direction. The inclined surfaces 36d and 36f are inclined surfaces that are formed to smooth the connection of the track with the upper connecting track member 33b. The inclined surfaces 36e and 36g are inclined surfaces formed in order to smoothly connect the track with the right rail 11b of the upper track member 11. The inclined surface can be easily formed by, for example, cutting.

  FIG. 12 is a perspective view showing the intermediate connection adapter 38 of the present embodiment. The intermediate connection adapter 38 is an adapter that forms and connects tracks that fill the gaps in the gaps 32c, 32d, 32e, and 32f (see FIG. 8) generated at both ends of the intermediate connection tracks 32a and 32b. It can be manufactured by welding a mold material having an L-shaped cross section and two flat plates to each other and cutting a part thereof. A mold member having an L-shaped cross section has two plate portions 38b and 38c that are vertically connected to each other. The plate portion 38c is provided with inclined surfaces 38d and 38e that are formed so that the thickness decreases toward the end in the track direction in order to smoothly connect the track with the intermediate connection tracks 32a and 32b. It has been. The plate portion 38b is provided with inclined surfaces 38g and 38h formed so that the thickness thereof becomes thinner toward the end in the track direction in order to smoothly connect the track with the intermediate connection tracks 32a and 32b. It has been.

  A plate material 38a is welded to the plate portion 38b. A plate material 38f is welded between the plate material 38a and the plate portion 38c arranged in parallel. The plate member 38f is inserted into the gaps 32c, 32d, 32e, and 32f (see FIG. 8), and is restrained at the positions of the gaps 32c, 32d, 32e, and 32f on the track. In other words, the intermediate connection adapter 38 can be coupled to the track without causing any positional displacement by simply fitting into the gaps 32c, 32d, 32e, and 32f.

(Content of sewer construction in the embodiment)
Drawing 13 is a flow chart which shows each process of sewer construction of an embodiment. In step S10, primary lining (see FIG. 3) is performed. The primary lining is a process of excavating the ground with the shield excavation system 70 and assembling the segment S with the inner surface of the excavation hole to form the inner wall 95.

  In step S20, secondary lining (see FIG. 7) is performed. The secondary lining is a process of bringing the reinforced plastic pipe 98 into the mine where the pit inner wall 95 is formed and burying it with foamed mortar in a state where the reinforced plastic pipe 98 is connected to each other. Since the secondary lining is performed in a state where excavation is completed and the shield excavation system 70 is carried out of the mine, the trailer track 20 used for the movement of the shield excavation system 70 is unnecessary.

  FIG. 14 is a flowchart showing each step of the primary lining in the embodiment. In step S11, the operator executes an excavation process. The excavation process is a process of excavating the ground with the mud pressure shield 71 and moving forward. The mud pressure shield 71 can be operated in the vertical and horizontal directions by adjusting the pressure distribution at the tip. As a result, the mud pressure shield 71 can dig into the ground below the road while avoiding the underground underground.

  In step S12, the operator executes a segment assembly process. The segment assembling step is a step of assembling the segment S in which the pit inner wall 95 is divided into a plurality of portions by pushing them forward with a hydraulic jack or the like and connecting them together. Since the segment S has a length of 0.9 m in the excavation direction in this embodiment, the mud pressure shield 71 can be advanced by 0.9 m by sequentially executing Step S11 and Step S12. On the other hand, the rail that forms the upper track member 11 has a length of 5 m as a single unit in the present embodiment. Therefore, by repeating each step of Step S11 and Step S12 5 to 6 times, mud pressure In front of the shield 71, it is possible to secure the excavation mine T1 long enough to lay the rail forming the upper track member 11 (steps S13 and S14).

  In step S15, the worker executes a track installation process. The track installation step includes (1) a step of welding and fixing the lower track device 50 to the rib 95r of the inner wall 95, and (2) a step of assembling the upper sleeper 17 to the rib 95r of the inner wall 95; (3) A step of assembling the upper track member 11 and the following carriage track 20 to the upper sleeper 17 is included. The upper track member 11, the following carriage track 20, and the upper sleeper 17 are laid by reusing the material after the shield excavation system 70 passes through.

  The upper track member 11, the following carriage track 20, and the upper sleeper 17 are assembled to the inner wall 95 so that the assembly and disassembly can be easily performed so that they can be reused. The upper sleeper 17 can be fixed by tightening the ribs 95r by, for example, a Bullman (not shown) fastened (for example, welded) to both ends of the upper sleeper 17. The upper track member 11 and the subsequent carriage track 20 can be fixed using a fastening member such as a screw.

  As described above, in this embodiment, only the material of the lower track device 50 is carried in, so that the material of the upper track member 11, the following carriage track 20, and the upper sleeper 17 is not carried in from the ground, and the mud pressure shield. All the track devices can be mounted in front of 71. On the other hand, since the lower track apparatus 50 has a very simple configuration as described above, the track can be extended forward with a minimum amount of materials.

  In step S <b> 16, the worker executes a coupled track device moving process. The connecting track device moving process uses the upper track member 11 and the lower track using the lower track device 50 exposed by removing the upper track member 11, the following carriage track 20, and the upper sleeper 17 behind the shield excavation system 70. This is a step of advancing the connecting track device 30 to connect the tracks of the device 50. The connecting track device 30 can be advanced by pulling the connecting arm 33g (see FIG. 10) of the connecting track device 30 with the battery locomotive 81 as described above.

  In step S <b> 17, the worker executes a connection track process. The coupled track process is a process of coupling the track of the lower track device 50 and the upper track member 11 using the coupled track device 30. The connecting track step includes (1) a step of connecting the lower track device 50 to the lower connecting track members 31a and 31b of the connecting track device 30 using a pair of upper connection adapters 36, and (2) the upper track member 11 as the upper step. A step of connecting to the connecting track members 33a and 33b, and (3) a step of attaching four intermediate connection adapters 38.

  In step S18, the operator confirms penetration. The penetration means reaching a vertical hole (not shown) excavated in the terminal area. The operator disassembles the shield excavation system 70 after completing the pit inner wall 95 and carries it out to the ground.

  FIG. 15 is a flowchart showing each step of the secondary lining according to the embodiment. In step S21, the worker executes a pipe laying process. The piping laying step is a step of transporting the reinforced plastic tube 98 inside the excavation pit T1 by the battery locomotive 81 and fixing it at the burying position. For fixing to the burial position, for example, a centering operation is performed using a lever block (registered trademark) or the like, and then connected to the reinforced plastic pipe 98 that has been buried, and in this state, positioning is performed between the inner wall 95 and the reinforced plastic pipe 98 This is done by attaching a jig (not shown).

  In step S22, the operator executes a partition wall installation process. The partition wall installation step is a step of installing a partition wall in the gap between the inner wall 95 and the reinforced plastic pipe 98 in order to prevent the intermediate material from flowing out when the intermediate material is injected. The partition wall is formed of cement brick or mortar, for example.

  In step S <b> 23, the operator performs an intermediate material injection process. In the step of injecting the intermediate material, the intermediate material mixed in the ground mixing plant (not shown) is sent to the excavation pit T1 by a pressure feeding pipe (not shown), and the intermediate material is inserted into the gap between the inner wall 95 and the reinforced plastic pipe 98. This is the step of injecting.

The present invention can achieve the following effects.
(1) In the primary lining, the following effects can be achieved. That is, by loading only the material of the lower track device 50 having an extremely simple configuration, the mud pressure shield 71 can be transported without carrying the materials of the upper track member 11, the following carriage track 20, and the upper sleeper 17 from the ground. All track devices can be mounted in front. Thereby, the environmental load resulting from disposal of the material for laying the track 20 for the following carts or the lower track device 50 can be reduced.
(2) Before the start of the secondary lining after the completion of the primary lining, the construction period for removing the primary lining track and installing the secondary lining track was an expense. According to the form, the track for the secondary lining is automatically completed when the primary lining is completed. Thereby, a construction period can be shortened remarkably.
(3) In the secondary lining, the lower track device 50 can provide a wide laying space in the excavation mine, and therefore can be embedded in the foamed mortar layer 97 without being discarded on the ground. Thereby, the work period of material removal of the lower track apparatus 50 is made unnecessary, and the environmental load resulting from the disposal can be reduced.

(Other embodiments)
The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  In the above-described embodiment, the present invention has been described by taking the laying of sewers as an example. However, the present invention can be widely applied to the construction of embedding tubular members such as waterworks, optical cables, and undergrounding of electric wires.

DESCRIPTION OF SYMBOLS 11 ... Upper track member, 17 ... Upper sleeper, 20 ... Trail for following carts, 30 ... Connection track device,
DESCRIPTION OF SYMBOLS 50 ... Lower track apparatus, 60 ... Track structure, 70 ... Shield excavation system, 71 ... Mud pressure shield, 72 ... Belt conveyor, 73 ... Driving carriage, 74 ... Power supply carriage, 75 ... Control board carriage,
76 ... Hydraulic source cart, 77 ... Transformer cart, 78 ... Cable reel cart, 80 ... Underground transport vehicle train, 81 ... Battery locomotive, 82 ... Material cart, 83 ... Transport vehicle, 91 ... Crane device,
97 ... Foamed mortar layer, 98 ... Reinforced plastic tube.

Claims (5)

In order to embed a tubular member in the ground, an underground track system used for movement of a follower carriage of a shield excavator and transportation of goods in a mine for burying the tubular member,
Of the excavation section in which the inner wall is formed by the excavator, it is provided in the face section of a predetermined length from the head, and is used for the movement of the first material transport track used for transporting the material and the subsequent carriage A first track on which the first material transport track and the follower track are fixed side by side through the first sleepers,
A second material transport track that is provided in all sections of the excavation section and is used to transport the material; and a second sleeper that fixes the second material transport track to the inner wall of the mine, and in the face section A second track arranged at a position closer to the bottom of the inner wall than the first sleeper;
A connecting track device that is movable on the second material transport track, and that absorbs and connects a difference in height between the first material transport track and the second material transport track and a lateral shift;
With
The connection track device includes a first connection track connected to the first material transport track, a second connection track connected to the second material transport track, the first connection track and the second connection. An intermediate connection track that connects the track, a first connection hinge that rotatably connects the first connection track and the intermediate connection track in a horizontal plane, and the second connection track and the intermediate connection track in a horizontal plane. And a second connecting hinge that is rotatably connected to the underground track system. The second sleeper is
A curved portion that is curved in a direction along the circumferential direction of the inner surface of the mine inner wall;
A pair of projecting portions provided to be spaced apart from each other by the same distance from each of both end portions of the bending portion toward the center position of the bending portion;
Have
The second material transport track includes a cross section composed of a first plate portion and a second plate portion bent at right angles to each other, and the second material transport track surface is formed on an upper surface. The underground track system according to claim 1, wherein the first plate portion is placed on the curved portion, and the second plate portion is in contact with the protruding portion. The connecting track device slides on the second material transport track surface, slides on the second material transport track surface, and slides on the second material transport track surface. An intermediate support part for supporting the second material transporting track surface, and a second support part for supporting the second connection track,
The first support portion includes a first parallelism regulating portion that maintains parallelism of the first connection track with respect to the first material transport track by being sandwiched between the first material transport tracks.
The second support portion has a second parallelism regulating portion that maintains parallelism of the second connection track with respect to the second material transport track by sandwiching the second material transport track from the outside.
3. The second connection track according to claim 2, wherein the second connection track extends from the second parallelism restricting portion to a center side of the second material transport track to form a surface common to an inner surface of the second material transport track. Underground track system. The second sleeper is provided with a predetermined interval in the curved portion, and has a pair of upright portions that rise upward.
The underground track system according to claim 2 or 3, wherein the first plate portion is placed on an upper end portion of the upright portion. A method of excavating the ground with a shield excavator using the underground track system according to any one of claims 1 to 4, and embedding a tubular member in the excavated excavation hole,
In the front of the shield excavator, a track laying step of laying the first material transport track, the second material transport track, and the subsequent carriage track,
An excavator advance step of advancing the shield excavator while excavating by the shield excavator;
In a state in which the second material transport track remains, a track removal step of removing the first material transport track and the subsequent carriage track in the section after passing through the shield excavator,
A connecting track step of advancing the connecting track device using the second material transport track to connect the second material transport track and the first material transport track;
A tubular member carrying step of carrying the tubular member into the excavation hole using the second material carrying track;
An embedding step of embedding the tubular member and the second material transporting track in the excavation hole;
A tubular member embedding method comprising:

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