JP5333073B2 - Track height adjustment system and track height adjustment method using the system - Google Patents

Description

  The present invention relates to a track height adjusting system for adjusting the height of a track such as a track on which a vehicle travels, and a track height adjusting method using the system.

  When a tunnel is constructed in the ground under the track such as a track, the track may be displaced up and down due to the ground subsidence or uplift accompanying the excavation of the tunnel. In order to prevent such vertical displacement of the track, conventionally, a support girder is laid under the sleeper in parallel with the track to support the sleeper, and a cushioning material is interposed between the sleeper and the support girder. A method for adjusting the height of the track by changing the height of the cushioning material is known.

  For example, in Patent Document 1, as a cushioning material, a pair of wedge materials are opposed to each other and arranged so as to be in contact with each other so that the inclined surfaces are in contact with each other, and the wedge materials are close to or separated from each other. A method of adjusting the height of the track by changing the height of the cushioning material by moving is disclosed.

JP 2004-68545 A

However, the method for adjusting the height of the cushioning material described in Patent Document 1 has the following problems.
(1) Since a pair of wedge materials are manually moved close to or separated from each other by hand, the vehicle is dangerous and cannot be operated during the time zone.
(2) If the height of the cushioning material has to be urgently adjusted during the time period during which the vehicle travels, the travel of the vehicle must be temporarily stopped.

  Therefore, the present invention has been made in view of the above points, and a track height adjustment system capable of adjusting the track height in a state where the vehicle can travel, and a track height using the system. The purpose is to provide an adjustment method.

In order to achieve the above object, the track height adjusting system according to the present invention includes:
A track for the vehicle to travel,
A cross beam installed under the track to support the track and intersecting the track;
A pair of main girders that are respectively installed under both ends of the cross beam to support the cross beam;
A telescopic device that can be telescopically operated and installed under the main beam to displace the main beam up and down.

  According to the present invention, since the telescopic device is provided below the track, the height of the track can be adjusted by expanding and contracting the telescopic device. In addition, since the telescopic device can be expanded and contracted by remote control, the height of the track can be adjusted while the vehicle can travel.

  Moreover, in this invention, the said expansion-contraction apparatus is good also as being installed on the ground improvement body formed by the ground improvement. If it does in this way, the reaction force which arises in the downward direction of an expansion-contraction apparatus can be supported by supporting a main girder with an expansion-contraction apparatus.

  Further, in the present invention, if the main girder and the ground improvement body are further provided with an anchor placed in the ground, the main girder can be prevented from being lifted.

  Further, in the present invention, a lateral movement prevention material for preventing movement to the side of the sleeper is further provided so as to be sandwiched between the sleepers installed under the track and the main girder. It is good.

  In the present invention, if the main girder is H-type steel or I-type steel, the main girder has high rigidity, so that the bending is very small. Accordingly, even when the vehicle travels on the track, the main girder positioned below the track has very little deflection at a portion other than the support position by the telescopic device, so that the track can be maintained substantially linear.

  Further, in the present invention, if a reinforcing rib is attached to a portion surrounded by the H-shaped steel or the I-shaped steel web and the upper and lower flanges, local buckling of the main girder is prevented. be able to. Therefore, since the main girder is less likely to buckle than when no reinforcing rib is attached, the linearity of the track can be maintained more reliably.

The present invention also provides a track for a vehicle to travel, a cross beam installed under the track to support the track so as to intersect the track, and both ends of the cross beam. A pair of main girders that are respectively installed underneath to support the horizontal girders, and telescopically extendable and telescopic devices installed under the main girders to displace the main girders up and down; In the track height adjustment method using the track height adjustment system comprising:
When the height of the track is measured and the track is lower than a predetermined height, the telescopic device is extended by remote operation to raise the track, and the track is higher than the predetermined height. The telescopic device is contracted by remote operation to lower the trajectory, so that the height of the trajectory is set to the predetermined height.

  According to the present invention, the telescopic device that can be expanded and contracted by remote control is provided below the track, so that the telescopic device can be expanded and contracted by remote control at a location away from the track to adjust the height of the track. it can.

  ADVANTAGE OF THE INVENTION According to this invention, the track height adjustment system which can adjust the height of a track | truck in the state which can drive | work a vehicle, and the track height adjustment method using the system can be provided.

It is a side view which shows the state which installed the track height adjustment system which concerns on this embodiment in the track. It is a top view which shows the state which installed the track height adjustment system which concerns on this embodiment in the track | line. It is the A section enlarged view of FIG. It is BB sectional drawing of FIG. It is a sectional side view which shows the state which installed the cross beam under the track. It is the D section enlarged view of FIG. FIG. 7 is a side view of FIG. 6. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG. It is the G section enlarged view of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, a case where the present invention is applied to a train track will be described. However, the present invention is not limited to this, and the present invention can also be applied to a track for traveling a vehicle other than a train. Moreover, in this embodiment, the case where the lower part of a track is dug with a shield machine along the said track in the construction which makes a ground track underground is demonstrated.

1 and 2 are a side view and a plan view showing a state in which the track height adjusting system 1 according to the present embodiment is installed on the track 2, respectively.
As shown in FIGS. 1 and 2, the track height adjustment system 1 is laid between a rail 2 and a ground 3, and the ground 3 is excavated by a shield machine 4 below the rail 2. This is a system for adjusting the height of the track 2 to prevent the track 2 from being displaced up and down and allowing the train 5 to travel safely on the track 2 even if the vehicle sinks or rises.

  The track height adjustment system 1 supports a plurality of cross beams 6 for supporting the track 2, a pair of main beams 7 for supporting both ends of the cross beam 6, and the main beams 7. A plurality of expansion / contraction devices 8 for displacing up and down, a drive source 9 for driving the expansion / contraction device 8, a display device 10 for displaying the expansion / contraction status of the expansion / contraction device 8, and the main girder 7 from being lifted And an anchor 11 for carrying out the operation.

3 is an enlarged view of a portion A in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. FIG. 5 is a side sectional view showing a state in which the cross beam 6 is installed under the track 2.
As shown in FIGS. 3 to 5, a plurality of cross beams 6 are installed between adjacent sleepers 12 so as to be orthogonal to the track 2. In the present embodiment, for example, H-shaped steel is used as the cross beam 6. However, the present invention is not limited to this, and any other material that can support the line 2 may be used.

  The cross beam 6 is installed in a space formed by removing a part of the ballast 13 laid between adjacent sleepers 12. At this time, the ballast 13 is removed so that the height of the space is the same as the height of the cross beam 6.

  FIG. 6 is an enlarged view of a portion D in FIG. As shown in FIG. 6, the pair of main girders 7 is arranged in parallel to the line 2 and is connected to both ends of the cross beam 6 so as to sandwich the cross beam 6 from both sides. In addition, when connecting the main beam 7 to the horizontal beam 6, a part of the ballast 13 in the vicinity of both ends of the horizontal beam 6 is removed in advance, and the ground is improved at the embankment 25 portion below the removed part. The body 14 is formed, and the expansion / contraction device 8 is installed thereon.

  For example, H-shaped steel is used as the main beam 7. Then, the lower flange 7 a of the main beam 7 and the lower flange 6 a of the horizontal beam 6 are connected by bolts and nuts 15. The H-shaped steel which is the main girder 7 has high rigidity and very little deflection.

Reinforcing ribs 16 are provided in the longitudinal direction of the main girder 7 in the portion surrounded by the web 7b of the main girder 7 and the portions of the upper and lower flanges 7c, 7a opposite to the horizontal girder 6. By attaching at intervals, local buckling of the main girder 7 can be prevented.
Even if some of the expansion / contraction devices 8 supporting the main girder 7 are lowered due to ground subsidence or the like and a gap is generated between these expansion / contraction devices 8 and the main girder 7, As described above, since the main girder 7 has high rigidity, the downward bending is very small. Moreover, even if some of the expansion / contraction devices 8 that support the main girder 7 rise due to the ground uplift and the expansion devices 8 try to push the main girder 7 upward, the main girder Since 7 has high rigidity, the expansion and contraction of the expansion / contraction device 8 is suppressed, and the upward deflection is negligible.

  The expansion / contraction device 8 is made of, for example, a hydraulic jack, and has a predetermined length in the longitudinal direction of the track 2 so as to support the main beam 7 between the steel plate 17 and the main beam 7 installed on the upper surface of the ground improvement body 14. Multiple units are installed at intervals. The expansion device 8 is fixed to the steel plate 17 with a bolt 18 that penetrates the steel plate 17. Thus, by providing the steel plate 17 on the ground improvement body 14, the reaction force generated when the expansion device 8 is extended to support the main girder 7 is dispersed throughout the steel plate 17. Prevent local loads from acting. In addition, when the ground 3 is firm, ground improvement may be omitted.

  Each expansion device 8 is connected to a pressure gauge 19 for measuring pressure and a sensor 20 for measuring the expansion / contraction length of the jack. All the pressure gauges 19 and the sensors 20 are connected to the display device 10, and the pressure value and the expansion / contraction length of each expansion / contraction device 8 can be visually confirmed.

  The drive source 9 is comprised from the generator 21 and the hydraulic pump 22 connected to the generator 21, and these are installed in the place away from the track | line 2 (refer FIG. 2).

  The display device 10 is installed in the vicinity of the drive source 9 (see FIG. 2), and the drive source 9 is operated while confirming the pressure value and the extension length of each extension device 8 with the display device 10. Can do.

7 is a side view of FIG. 6, and FIG. 8 is a cross-sectional view taken along line EE of FIG.
As shown in FIGS. 7 and 8, the anchor 11 is driven into the ground 3 through the lower flange 7 a of the main girder 7 and the ground improvement body 14. A nut 23 is attached to the upper end of the anchor 11. When the main girder 7 is lifted, the nut 23 prevents the further lifting of the main girder 7 by the lower flange 7a of the main girder 7 coming into contact with the nut 23, and has a function as a stopper.

9 is a view taken along the line FF in FIG. 1, and FIG. 10 is an enlarged view of a portion G in FIG.
As shown in FIGS. 9 and 10, the track height adjusting system 1 further includes a lateral movement preventing member 24 for preventing the sleepers 12 from moving sideways.

  The lateral movement prevention member 24 is installed between the sleepers 12 and the main beam 7. For example, a pipe support is used as the lateral movement preventing member 24. With this lateral movement prevention member 24, it is possible to prevent the sleepers 12 from moving laterally due to the traveling of the train 5, the ground 3 being subsidized or raised, and the like.

  Below, the track height adjustment method using the track height adjustment system 1 having the above-described configuration will be described. First, the track height adjusting method based on the height of the track 2 will be described, and then the track height adjusting method based on the pressure value of the expansion and contraction device 8 will be described.

<About the track height adjustment method based on the height of the track 2>

  First, the height of the track 2 is measured with a laser measuring instrument or the like from a place away from the track 2 so as not to obstruct the traveling of the train 5, and the height of the track 2 based on the measurement result and the design are set in advance. The difference with the predetermined height of the track 2 is calculated.

  Next, when the track 2 is lower than a predetermined height due to ground subsidence or the like, the telescopic device 8 is extended and the track 2 is raised via the main beam 7 and the horizontal beam 6. At this time, while confirming the extension length of the expansion / contraction device 8 on the display device 10, the expansion / contraction device 8 is extended by the above-mentioned difference and maintained as it is so that the line 2 has a predetermined height. Thereafter, the height of the line 2 is measured again to confirm that the line 2 is at a predetermined height.

  On the other hand, when the track 2 is higher than a predetermined height due to the influence of the ground uplift or the like, the telescopic device 8 is contracted and the track 2 is lowered via the main beam 7 and the horizontal beam 6. At this time, while confirming the contraction length of the expansion / contraction device 8 with the display device 10, the expansion / contraction device 8 is contracted by the above-mentioned difference and maintained as it is so that the line 2 has a predetermined height. Thereafter, the height of the line 2 is measured again to confirm that the line 2 is at a predetermined height.

<About the method of adjusting the height of the track based on the pressure value of the expansion device 8>

First, the pressure value of each expansion / contraction device 8 displayed on the display device 10 is visually checked to confirm the presence / absence of the expansion / contraction device 8 showing a value larger or smaller than a predetermined value set in advance.
When there is no expansion / contraction device 8 showing a value larger or smaller than the predetermined value, it indicates that the main girder 7 is supported almost uniformly by all the expansion / contraction devices 8, and is in a normal state. The monitoring of the pressure value of each telescopic device 8 is continued as it is.

  On the other hand, when there is the expansion / contraction device 8 showing a value smaller than the predetermined value, the ground improvement body 14 and the expansion / contraction device 8 are lowered due to the ground subsidence, and a gap is generated between the main girder 7 and the expansion / contraction device 8. Because the telescopic device 8 does not support the main beam 7, it is considered that the pressure value is smaller than the predetermined value. In this case, the portion of the line 2 located above the telescopic device 8 is bent downward, and the height of the line 2 is lower than the surroundings. Therefore, in such a case, while measuring the height of the track 2 and confirming the pressure value of the expansion device 8 with the display device 10, the expansion device 8 is extended to support the main girder 7, and the pressure value is Adjustment is made so that the predetermined value is obtained. Then, the height of the line 2 in the vicinity of the expanded telescopic device 8 is measured to confirm that it is a predetermined height.

  In addition, when there is the expansion / contraction device 8 showing a value larger than the predetermined value, the ground improvement body 14 and the expansion / contraction device 8 are raised by the influence of the ground uplift, and the expansion / contraction device 8 is pressed against the main girder 7. The pressure value is considered to be larger than the predetermined value. In this case, the portion of the line 2 located above the telescopic device 8 is bent upward, and the height of the line 2 is higher than the surroundings. Therefore, in such a case, while measuring the height of the line 2 and confirming the pressure value of the expansion device 8 with the display device 10, the expansion device 8 is contracted so that the pressure value becomes the predetermined value. Adjust to. Then, the height of the track 2 near the contracted expansion / contraction device 8 is measured to confirm that it is a predetermined height.

  In the above-described method for adjusting the height of the track based on the height of the track 2 and the method for adjusting the height of the track based on the pressure value of the expansion / contraction device 8, the work of measuring the height of the track 2 and the operation of expanding / contracting the expansion / contraction device 8 are Since the traveling of the train 5 is not hindered, the operation can be performed in a state where the train 5 can travel.

The track height adjustment system 1 is installed between the track 2 and the ground 3 in the vicinity of the face 28 (for example, the section L in FIG. 1) where the ground 3 is liable to sink or rise. It installs so that it may move to the advancing direction of the shield machine 4 with 4 excavation.
Specifically, as shown in FIG. 1, above the segment 26 where the time required for the backfilling material filled between the segment 26 and the inner peripheral surface of the tunnel 27 to harden has elapsed (from the section L). As shown by the dotted arrows in FIG. 1, the cross beam 6, the main beam 7, the telescopic device 8, etc., located on the wellhead side) are removed and immediately transported in the direction of travel to the vicinity of the face 28. It is sequentially installed on the traveling direction side from the already installed horizontal beam 6 and the like.

When the work of excavating the lower side of the track 2 with the shield machine 4 is finished and there is no possibility that the ground 3 will sink or rise, the track height adjustment system 1 is removed.
The removal of the track height adjusting system 1 is performed by first removing the main beam 7, the telescopic device 8, and the horizontal beam 6 in this order. When the track height adjustment system 1 is removed, the ballast 13 is laid to a predetermined height between the adjacent sleepers 12 to restore the state before the track height adjustment system 1 is installed.

  According to the track height adjustment system 1 in the present embodiment described above, the telescopic device 8 is provided below the track 2, and therefore the height of the track 2 is adjusted by expanding and contracting the telescopic device 8. Can do. Moreover, since the telescopic device 8 is remotely operated at a location away from the track 2, the height of the track 2 can be adjusted while the vehicle is traveling.

  Moreover, since the ground improvement body 14 exists under the expansion-contraction apparatus 8, it can prevent that the lower end of the expansion-contraction apparatus 8 sinks in the ground 3 by the reaction force produced when the expansion-contraction apparatus 8 supports the main girder 7. FIG. Therefore, the main girder 7 can be reliably supported by the telescopic device 8. Furthermore, even if the ground 3 around the track 2 is soft, the track height adjusting system 1 of the present invention can be applied.

  In addition, the presence of the steel plate 17 on the ground improvement body 14 enables the reaction force due to the extension of the expansion / contraction device 8 to be dispersed throughout the steel plate 17. Thereby, it can suppress that a load acts on the ground improvement body 14 located right under the expansion-contraction apparatus 8, and can prevent the ground improvement body 14 from being damaged.

  Moreover, since the anchor 11 is installed, the main girder 7 can be prevented from being lifted.

  Further, since the lateral movement preventing member 24 is provided, it is possible to prevent the sleepers 12 from moving laterally due to the traveling of the train 5, the rising or sinking of the ground 3, and the like.

  Since the main girder 7 has high rigidity, the bending is very small. Therefore, even if the train 5 travels on the track 2, the main girder 7 located under the track 2 has very little deflection, and thus the height of the track 2 can be maintained almost constant.

  Further, even if some of the expansion / contraction devices 8 supporting the main girder 7 descend due to ground subsidence or the like and a gap is generated between these expansion / contraction devices 8 and the main girder 7, Since the main girder 7 has high rigidity, the downward deflection is negligible. Furthermore, even if some of the expansion / contraction devices 8 that support the main girder 7 are lifted by ground uplift or the like, and these expansion / contraction devices 8 try to push the main girder 7 upward, the main girder Since 7 has high rigidity, the expansion / contraction portion of the expansion / contraction device 8 is suppressed, and the upward deflection is negligible. Therefore, the line 2 can be kept linear.

  Further, since the reinforcing ribs 16 are attached to the portion surrounded by the web 7b of the main beam 7 and the portions of the upper and lower flanges 7c, 7a opposite to the horizontal beam 6, the main beam 7 It is possible to prevent local buckling.

  In addition, in this embodiment, although the case where the lower part of the track | line 2 was excavated along the track | line 2 was demonstrated, it is not limited to this, It excavates so that the lower part of the track | line 2 may cross | intersect with the track | line 2 In this case, the track height adjusting system 1 is installed at the intersection and in the vicinity thereof.

  In the present embodiment, the reinforcing ribs 16 are attached only to the portion surrounded by the web 7b of the main beam 7 and the portions of the upper and lower flanges 7c, 7a opposite to the horizontal beam 6. Although the case has been described, the present invention is not limited to this, and the reinforcing rib is provided only in a portion surrounded by the web 7b of the main beam 7 and the portions of the upper and lower flanges 7c and 7a on the horizontal beam 6 side. 16 may be attached, or may be attached to both the cross beam 6 side and the opposite side.

  In the present embodiment, the case where H-shaped steel is used for the main girder 7 has been described, but I-shaped steel may be used. Moreover, it is not necessary to be a steel material, and a PC concrete girder may be used as long as it has a predetermined rigidity.

DESCRIPTION OF SYMBOLS 1 Track height adjustment system 2 Track 3 Ground 4 Shield machine 5 Train 6 Horizontal girder 6a Lower flange 7 Main girder 7a Lower flange 7b Web 7c Upper flange 8 Telescopic device 9 Drive source 10 Display device 11 Anchor 12 Sleeper 13 Ballast 14 Ground Improvement Body 15 Bolt / Nut 16 Reinforcing Rib 17 Steel Plate 18 Bolt 19 Pressure Gauge 20 Sensor 21 Generator 22 Hydraulic Pump 23 Nut 24 Lateral Movement Prevention Material 25 Embankment 26 Segment 27 Tunnel 28 Face

Claims (7)

A track for the vehicle to travel,
A cross beam installed under the track to support the track and intersecting the track;
A pair of main girders that are respectively installed under both ends of the cross beam to support the cross beam;
An orbital height adjustment system comprising: an expansion / contraction device that can be extended / contracted by remote operation and that is installed under the main girder to displace the main girder up and down.   2. The track height adjusting system according to claim 1, wherein the expansion device is installed on a ground improvement body formed by ground improvement.   The track height adjusting system according to claim 2, further comprising an anchor penetrating the main girder and the ground improvement body into the ground.   The apparatus according to claim 1, further comprising a lateral movement prevention member that is installed so as to be sandwiched between a sleeper installed under the track and the main girder and prevents movement of the sleeper to the side. The track height adjustment system according to any one of 1 to 3.   The track height adjustment system according to any one of claims 1, 3, and 4, wherein the main girder is H-shaped steel or I-shaped steel.   6. The track height adjusting system according to claim 5, wherein a reinforcing rib is attached to a portion surrounded by the H-shaped steel or the I-shaped steel web and an upper and lower flange. A track for a vehicle to travel, a cross beam installed under the track so as to intersect the track and supporting the track, and installed under both ends of the cross beam The height of the track comprising: a pair of main girders for supporting the horizontal girders, and telescopic devices that can be telescopically operated and installed under the main girders to displace the main girders up and down. In the method of adjusting the height of the track using the adjustment system,
When the height of the track is measured and the track is lower than a predetermined height, the telescopic device is extended by remote operation to raise the track, and the track is higher than the predetermined height. A method for adjusting the height of the track, wherein the telescopic device is contracted by remote operation to lower the track to bring the height of the track to the predetermined height.

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