JP5022836B2 - Method for compacting ballast ballast using a tamping tool - Google Patents

Description

  The present invention relates to a method for tamping a roadbed ballast using a tamping tool for multiple tie tampers.

  Ballasts are laid on the roadbed to support and buffer the sleepers on the roadbed, but due to repeated train loads, freezing and other natural phenomena, track subsidence occurs, buffering is reduced, and riding comfort is poor. Become. For this reason, track maintenance and ballast replenishment and replacement are required. At that time, a tamping tool (beater) provided in the multiple tie tamper is used to push the ballast under the sleepers and harden it (tamping operation). . A compaction device that performs this compaction operation includes a pair of front and rear tamping tools sandwiching a sleeper that are vibrated by a vibration motor, and an opening / closing means (usually a hydraulic cylinder) that opens and closes the front and rear tamping tools. The tamping tool is inserted into the ballast so that the sleeper is sandwiched from the front and back, and the tool is vibrated by a motor so that the gap between the ballast and the sleeper is eliminated by the tool tip (plate). A method is adopted in which the tool is closed so as to be sandwiched so that the tip of the tool is pushed below the sleeper and the ballast is pushed directly below the sleeper (for example, Patent Document 1).

JP 7-119105 A

  In the conventional example, the compaction operation performed after the tamping tool is inserted into the predetermined position of the ballast is usually performed only in one step (one time), and it is not possible to obtain a satisfactory number of compacted states in only one step. In some cases, 2 steps (2 times) may be performed, but since the penetration position of the tamping tool does not change (because the penetration depth of the tamping tool is the same in both 2 steps), it may vary greatly from the case of 1 step. At present, the compaction effect cannot be obtained, and therefore, the compaction operation cannot always obtain a satisfactory work result.

  The present invention pays attention to the drawbacks of the compaction operation of such a conventional example, and proposes a method for reliably obtaining the compaction effect by making the penetration depth of the tamping tool shallower in the subsequent process than in the previous process. It was created as much as possible.

  The tamping tool is composed of a plurality of front and rear tamping operations with different penetration depths of the tamping tool with respect to the ballast. After the previous tamping operation, the tamping tool is placed above the tamping tool penetration portion during the previous tamping operation. In the state where the lower end side is partly located, the subsequent tamping operation is performed sequentially, and the tamping tool penetration depth position at the final tamping operation is at the shallowest position It is.

  According to the present invention, since the stiffening operation is performed stepwise from directly below the sleeper, the vertical (vertical) width of the compacted and dense ballast layer is widened. The ballast layer that can stably support the load) can be obtained, and even if an existing tamping tool is used as it is, an efficient compacting operation can be performed.

  The drawings show one embodiment of a tamping tool used in the present invention, FIG. 1 is a schematic front view showing a use state, and FIG. 2 is a process diagram of a compaction operation.

  In the figure, reference numeral 1 denotes a tamping tool used in the present invention. The tamping tool 1 is attached to a support arm 4 of a tamping unit 3 provided in a multiple tie tamper 2 to constitute the tamping unit 3. A plurality of sets of a pair of tamping tools 1 and 1 opposed to each other are provided, and each one-to-one set of tamping tools 1 and 1 makes the ballast of the road bed below the sleeper m part to be compacted. Perform the compaction operation of b.

  The tamping tool 1 is constructed by fitting the upper end of the tamping tool 1 to the support arm 4 and providing a plate 6 for the tightening operation at the lower end.

  Then, by operating the operation (control) unit provided in the multiple tie tamper 2, the entire tamping unit 3 including the tamping tool 1 is lowered and the plate 6 of the tamping tool 1 is moved on the road bed while being vibrated by the vibration device. The tip of the support arm 4 is penetrated into the ballast b to be configured, lowered to reach a position below the sleeper m set in advance to a predetermined depth, and reached that position (see FIG. 2a). The plate 6 is moved by moving the lower plate 6 side on the distal end side of the pair of tamping tools 1 and 1 facing each other through the sleeper m in a direction approaching each other. , 6 (see Fig. B), the support arm 4, 4 is returned to the original position, and the primary compaction operation is performed. To end the.

  The ballast portion compacted by this primary compaction operation becomes dense to obtain a primary compaction ballast portion b ', and a part of the ballast pushed out between the plates 6 and 6 by this operation is part of the ballast. It moves upward from the part b ′. Then, the tamping unit 3 is lifted from the primary compaction end position and re-entered into the ballast b, so that the plate 6 of the tamping tool 1 has a lower end side at the upper position of the plate 6 during the primary compaction operation. When the plate 6 is placed (lowered) (see FIG. 2c) and then the secondary compaction operation is performed (see FIG. 2d), the plate 6 is primary compacted. Secondary and compacted in the secondary compaction operation in order to perform ballast compaction by placing it at a position that partially overlaps with the secondary compaction operation. The compacted ballast portion b ″ overlaps with the primary ballast b ′ portion to form a ballast portion having a layer thickness (e diagram in FIG. 2).

  Then, after this secondary compaction operation, a third tertiary compaction operation is performed in the same manner to obtain a new tertiary compaction ballast portion b ′ ″ that has been compacted by the operation. A dense ballast layer in which the ballast portions b ′, b ″, b ′ ″ are laminated is formed (see FIG. 2 f).

  Incidentally, the penetration position of the tamping tool 1 does not change during the first to third steps, but the penetration depth (plate 6) becomes shallower in the subsequent stage.

  In addition, the plate 6 of the tamping tool 1 shown in the figure is a slightly flat plate having a vertical width of 70 mm and a horizontal width of 132 mm, and the front (lower) end is located at a position 150 mm below the sleeper m when the plate 6 is subjected to primary compaction operation. After the second compaction operation is performed again at the 135 mm position below the sleeper (35 mm, that is, half overlap), after performing the compaction operation. The tip of the plate 6 was placed at a position 80 mm below the sleeper m, and a third compaction operation as the final process was performed, and it was confirmed that this was an effective compaction method.

  For the compaction operation, the compaction operation is generally performed 10 mm below the sleeper. At least, the compaction operation performed at the position closest to the sleeper is the final compaction operation. If the operation is performed at least one step as the final stage compaction operation to be performed on the lower side, the dense layer of ballast immediately below the sleepers becomes the layer thickness for the number of steps, so it is extremely It seems to be effective. Therefore, the two-stage compaction operation is also effective. In short, the next-stage compaction operation should be performed on the upper side partially overlapping with the previous-stage compaction operation section (multiple times). .

The schematic front view which shows a use condition. Process diagram of compaction operation.

Explanation of symbols

1 Tamping tool 2 Multiple tie tamper b Ballast

Claims (1)

This is a method of solidifying the ballast with a pair of tamping tools facing each other across the sleepers , consisting of a front and rear multi-stage compaction operation process with different penetration depths of the tamping tool with respect to the ballast. In the state where the lower end side of the tamping tool is partially located above the penetration portion of the tamping tool during the compaction operation of the front stage, the compaction operation of the rear stage is sequentially performed, and the tamping during the compaction operation of the final stage is performed. A method for compacting ballast ballast using a tamping tool, characterized in that the depth of penetration of the tool is at the shallowest position.

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