JP4111285B2 - Laying a temporary track for tunnel construction - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a temporary track for tunnel construction that is installed at the bottom of a primary lining segment in order to run a trolley car, a follower truck, a scrap steel car, a segment carrier car, a locomotive, etc. about the laying how.
[0002]
[Prior art]
For example, in the construction of shield tunnels, etc., after the construction of the primary lining segment in order to run the following carriages, shear steel cars, segment transport vehicles, locomotives, etc. The sleepers are immediately passed in the tunnel width direction, and the rails for the subsequent carriage and the underground transport vehicle are laid on the sleepers along the longitudinal direction of the tunnel.
[0003]
In the case of a small cross-section tunnel, as shown in FIG. 3, a pair of left and right rails 1 and 1 for traveling the underground transport vehicle 7 and shield power and incidental equipment taken along with the shield machine, A total of three rails 1 and 2 with the rail 2 of the trailing carriage 6 for slipping-out facilities and the like are laid, and the walkway scaffolding plate 8 extends along the tunnel longitudinal direction inside the rails 1 and 1 for the underground transport vehicle Laid. Since the rail 2 of the succeeding carriage 6 is a monorail, it is supported by a guide rail on the bracket 20 attached to the side surface of the primary lining segment 10.
[0004]
[Problems to be solved by the invention]
As described above, in order to install the three rails in the narrow tunnel and allow the underground transport vehicle 7 and the subsequent carriage 6 to travel in parallel, the height of the sleepers 3 is set to a certain level. As a result, when the worker walks on the stairway scaffold 8, he / she is forced to walk in the middle / waist state, and there is a problem that long-distance walking is very painful.
[0005]
When the tunnel is a water tunnel or the like, after completion of the primary lining, a water pipe having a diameter smaller than that of the primary lining segment 10 must be carried in. Since the water pipe could not be carried in at a height, there was a problem that after the primary lining was completed, the secondary lining track had to be laid again at a low height position over the entire line.
[0006]
On the other hand, in view of the above-mentioned problem of posture burden during walking, in Japanese Utility Model Publication No. 7-8639, as shown in FIG. 12, rail 55, In addition to providing rail mounting portions 51 and 51 for laying 56, a scaffold mounting portion 52 on which a walking scaffold board is mounted is provided at a position lower than the rail mounting portions 51 and 51, and an auxiliary rail is provided on the scaffold mounting portion 52. A tunnel sleeper has been proposed in which a stand 53 for placing 54 is movable. According to this temporary sleeper, the step that is one step lower than the rail laying surface is used as the walking surface, so that the worker is not forced to walk with the middle waist and the burden during walking is greatly reduced. It becomes like this. However, when the water pipe is carried in, problems such as a new secondary lining track have to be re-installed, and a specially produced sleeper is produced. Problems such as bulkiness and increased material cost, and after replacing the track to the auxiliary rail, the track center will be eccentric from the center of the tunnel, so a separate clasp is required to prevent segment rolling There was a problem such as having to be installed.
[0007]
Therefore, the main problems of the present invention are to firstly increase the height of the sky from the walking surface so that workers can walk easily, to eliminate the posture burden during walking, and secondly immediately after the primary lining. Tunnel construction that can solve large-scale sewage pipes in order to improve work efficiency and shorten the construction period, and thirdly to prevent rolling due to rail eccentricity. It is to provide a method for laying a temporary track.
[0008]
[Means for Solving the Problems]
A method for laying a temporary track for tunnel construction according to the present invention for solving the above-described problem is provided in parallel with tunnel excavation by a shield machine, in the primary lining segment where installation is completed, at least on the rear side of the shield machine. A sleeper for primary lining is installed at a height position where a follower cart and a transport vehicle traveling in the tunnel mine can travel in parallel, and a rail for traveling the follower cart and the transport vehicle is installed. In the tunnel excavation, in order from the point where the succeeding carriage moving forward with the shield machine on the rear side of the tunnel has passed, the sleepers for primary lining and the rails on which the succeeding carriage and the carriage travel are removed, with installing sleepers for the time of a secondary lining into a primary lining at a relatively lower height than the sleepers position, the re-laying only rail of the truck is traveling, shea It is characterized in that the field-side of the primary lining during sleepers the installed carrier vehicle in joins with a rail traveling.
[0009]
In this case, the segment rolling can be prevented at the same time if the rail center of the rail on which the transport vehicle installed on the sleeper for secondary lining travels coincides with the tunnel center.
[0010]
In the above-described method of the present invention, when tunneling with a shield machine, a temporary track is laid at a predetermined height position according to a normal method. To do. Therefore, in most tunnel sections other than the section where the following carriage is placed, the height of the inner space can be set high, so that workers can walk without going back and forth when going up and down, for example, between a shaft and a face. become able to.
[0011]
Moreover, at the time of the primary lining, that is, along with the tunnel excavation, the refilling of the track is completed, so that a large-diameter water pipe can be carried into the tunnel simultaneously with the start of the secondary lining work. Conventionally, track reshuffling over the entire line was performed between the completion of the primary lining and the start of the secondary lining, which took a considerable period of time, but this period can be omitted. As a result, the construction period can be greatly shortened.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
Outline of the present invention is as follows. During tunnel excavation, that is, when excavating with a shield machine and installing a primary lining segment, as usual, along with the rail for the following carriage that is accompanied with the shield machine, segment transportation and slip-out For example, if the trailer moves forward with the shield machine, the trailer for the trailer is no longer necessary. In this case, the trajectory is changed.
[0014]
In more detail below, as shown in FIG. 1, in the tunnel T under construction, the shield machine S is positioned at the tip (face) in the mine, and moves forward with the excavation of the ground. Yes. Immediately behind this shield machine S is a material for excavation, lining, backfilling work, machinery and equipment, shield power, and auxiliary equipment over a predetermined section, in this example, over a section of about 60 m. , Followed by the following carriages 6, 6 ...
[0015]
As shown in FIG. 3, the rail structure of the subsequent carriage arrangement section A is a primary made of an H steel mold material that cannot move with respect to the bottom of the primary lining segment 10 using the circumferential segment ribs 10 a and 10 a. A pair of left and right rails 1 and 1 (hereinafter referred to as a transport vehicle rail) for traveling the underground transport vehicle 7 on the upper surface side of the sleeper 3 for primary lining, and the following A total of three rails 1, 1 and 2 with a mono rail 2 for the bogie 6 (hereinafter referred to as a trailing bogie rail) are laid along the tunnel longitudinal direction. In this example, the sleeper 3 for the primary lining is installed at a height position (RL) at which the follower carriage 6 and the underground transport vehicle 7 can travel in parallel, and inside the transport vehicle rails 1 and 1. The pedestrian scaffolding plate 8 is laid along the longitudinal direction of the tunnel. In addition, the above-mentioned rail structure is a rail structure generally adopted in a general small diameter shield.
[0016]
On the other hand, in the section on the rear side of the section where the succeeding carriages 6, 6... Are arranged (hereinafter referred to as the “rail reshuffling completion section C”), the carriage rails 1, 1 are disposed with the ramp section B in between. The track is rearranged in a state where it is lower than the track level of the subsequent carriage arrangement section A by h. Specifically, as shown in FIG. 4, the secondary lining sleepers 5 are located at a position (RL-h) lower than the installation height of the primary lining sleepers 3 of the subsequent carriage arrangement section A by h. 5 ... are installed at predetermined intervals in the longitudinal direction of the tunnel, and the carriage rails 1, 1 are laid on the secondary lining sleepers 5, 5 ... in a target arrangement with the tunnel vertical center line as a boundary. ing. In addition, the sleeper height of the rail reshuffling completion section C is determined after comprehensively taking into consideration the ease of walking of workers, the introduction of water pipes carried in at the time of secondary lining, and the like.
[0017]
In the ramp section B as a rubbing section provided between the succeeding carriage arrangement section A and the rail refilling completion section C, a special construction in which only the upper surface flange is inclined in order to lay the carrier rail 1 inclined. In the section C of the rail refilling completion, the center of the track is made coincident with the center of the tunnel, and the rails in both sections are connected while being curved in an S shape in a plane. In order to allow the underground transport vehicle 7 to travel smoothly, it is preferable to make the section length as long as possible and to make the slope gradient gentle.
[0018]
Specifically, as shown in FIG. 5, the secondary lining sleeper 5 uses a grooved steel as a sleeper body, and at both ends thereof, two cutting lines 5b are formed along the longitudinal direction of the member from the edge. , 5b and a portion 5a (hereinafter referred to as a cut-and-raised piece) sandwiched between the cut lines 5b, 5b is bent upward. The cut and raised piece 5a is cut to a length that does not interfere with the traveling of the underground transport vehicle 7 after being cut and raised.
[0019]
When installing the sleeper 5 for primary lining, as shown in FIG. 6, the slit groove P formed by the cut and raised pieces 5 a is fitted to the segment ribs 10 a of the primary lining segment 10. And it fixes so that it cannot move in the state which grounded both ends with respect to the inner surface of the primary lining segment 10.
[0020]
The cut and raised piece 5a is used for forming the slit groove P and at the same time as a side edge stopper for restricting the position of one side of the transport vehicle rails 1 and 1. As shown in FIG. 8, while the outer edge of the carriage rail 1 is cut and raised and brought into contact with the piece 5 a, the inner edge of the rail 1 is made of the sleeper 5 for secondary lining. The rail clip 12 is fastened and fixed by a bolt 13 in which only the screw portion protrudes upward from the bolt hole from the lower surface side and a nut 14 screwed into the screw portion. In this case, if the bolt head is fixed to the secondary lining sleeper 5 by welding in a state where the screw portion is inserted into the bolt hole, there is no need to insert the bolt 13 and the bolt 13 is fastened. Work efficiency can be improved.
[0021]
The cut-and-raised piece 5a needs a function as a stopper that restricts the position of one side of the transport vehicle rail 1 as a minimum function. However, as shown in FIG. 9, the base flange of the transport vehicle rail 1 is used. A slit-shaped opening groove that is bent in an inverted L shape along the line 1a and that opens to the side is formed, and a side edge of the base flange 1a of the transport vehicle rail 1 is fitted into the opening groove and fixed. May be. In this case, the lifting of the carriage rail 1 can be prevented at the same time.
[0022]
The refilling of the track rail is performed, for example, according to the procedure shown in FIG. In this example, since the rail refilling is performed about every month, about 200 m, which is the digging distance per month, is set as one refilling section.
[0023]
When the shield machine S moves forward with excavation from the track laying state at a certain stage during excavation shown in FIG. 10 (A), the shield machine S is pulled by the shield machine S or by self-running to match the progress of the shield machine S. However, the following carts 6, 6. After the passage of about one month, if the shield machine S and the following carts 6, 6... Have advanced about 200 m as shown in FIG. The section up to the ramp section (about 200 m) is replaced with a secondary lining sleeper 5. FIG. 10C shows a state where the replacement of the sleepers is completed and the transport rail 1 is laid again.
[0024]
If the above-mentioned track re-sampling is repeated and then the primary lining is completed, the water pipe 15 is carried in using the transport vehicle rails 1 and 1 that have already been re-sold to the low level side. As shown in FIG. 11, the secondary lining work is carried by mounting a water pipe 15 on a pipe carrier 7 ′ traveling on the carriage rails 1, 1 and transporting it to a predetermined position in the tunnel. Once installed at the center position, a secondary lining is constructed by placing concrete between the water pipe 15 and the primary lining segment 10.
[0025]
【The invention's effect】
As described above in detail, according to the track laying method according to the present invention, during the tunnel excavation, the track is rearranged to a lower position in order from the point where the subsequent cart rail is no longer necessary, so the subsequent cart is arranged. In most tunnel sections other than the section, the height of the inner sky can be set high, so that workers can walk easily without being in the middle. In addition, because the secondary lining track is replaced during the primary lining, it becomes possible to carry in a large-diameter sewer pipe immediately after the primary lining, thus improving work efficiency and shortening the construction period. Can be planned. Furthermore, if the track after refilling is used as the center of the tunnel, since the refilling to the tunnel center is completed at an early stage, there is no eccentric loading by the transport vehicle, and rolling can be easily prevented.
[Brief description of the drawings]
FIG. 1 is a side view showing an outline of a temporary track in the method of the present invention.
FIG. 2 is an enlarged plan view of a main part thereof.
FIG. 3 is a view taken along the line III-III in FIG. 1;
4 is a view taken in the direction of arrows IV-IV in FIG. 1;
FIG. 5 is a main part perspective view showing an end structure of a secondary lining sleeper 5;
FIG. 6 is a front view of an installed state of a sleeper 5 for secondary lining.
FIG. 7 is a plan view thereof.
FIG. 8 is an enlarged view of a rail fixing part.
FIG. 9 is an enlarged view of a rail fixing portion according to another fixing method.
FIG. 10 is a trajectory replacement procedure diagram.
FIG. 11 is a front view showing a water pipe carrying state.
FIG. 12 is a front view of a conventional temporary track sleeper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Carriage rail, 2 ... Subsequent cart rail, 3 ... Primary sleeper sleeper, 4 ... Ramp sleeper, 5 ... Secondary sleeper sleeper, 5a ... Cut-up piece, 6 ... Subsequent cart, 7 ... Transport in underground Car, 8 ... Walkway scaffolding, 10 ... Primary lining segment, 10a ... Segment rib, 15 ... Water pipe

Claims (2)

In parallel with tunnel excavation by a shield machine, at least a succeeding carriage entrained behind the shield machine and a transport vehicle traveling in the tunnel mine can run in parallel in the primary lining segment that has been installed. A sleeper for primary lining is installed at a height position, and a rail for traveling the follower cart and the transport vehicle is laid, while the follower cart that moves forward with the shield machine on the rear side of the tunnel passes through the tunnel excavation. In order from the finished position, the sleepers for the primary lining and the rails on which the follower carriage and the transport vehicle travel are removed, and the secondary lining is used at a relatively lower height than the sleepers for the primary lining. with installing the sleepers, with re-laying only rail of the truck is traveling, to connecting a rail to shield machine side of the primary lining installed sleepers for during the transportation vehicle travels Laying method tunnel construction for temporary track, characterized in that. The method for laying a temporary track for tunnel construction according to claim 1, wherein the track center of the track on which the carriage installed on the sleeper for secondary lining travels is aligned with the center of the tunnel.

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