Title:
トンネル緩衝工の微気圧波低減構造
Document Type and Number:
Japanese Patent JP7004639
Kind Code:
B2
Abstract:
To provide a micro pressure wave reducing structure of a tunnel buffer construction reduced in construction cost, while improving the performance of an existing tunnel buffer construction.SOLUTION: A micro pressure wave reducing structure 5 reduces a tunnel micro pressure wave emitted from an opposite side tunnel entrance, when a train 1 rushes into a tunnel entrance 3a by a tunnel buffer construction 4 covering the tunnel entrance 3a. The micro pressure wave reducing structure 5 has buffer construction parts 6A, 6B in this order from a buffer construction opening 4a toward the tunnel entrance 3a, in such a manner that a sectional area of the tunnel buffer construction 4 increases stepwise from the tunnel entrance 3a toward the buffer construction opening 4a. The buffer construction 6B is a newly provided tunnel buffer construction covering the existing tunnel buffer construction or the tunnel entrance 3a, and the buffer construction 6A is a newly provided tunnel buffer construction extended to the existing tunnel buffer construction.SELECTED DRAWING: Figure 2
More Like This:
Inventors:
Saito Mitsutoshi
Application Number:
JP2018237746A
Publication Date:
January 21, 2022
Filing Date:
December 19, 2018
Export Citation:
Assignee:
Railway Technical Research Institute
International Classes:
E21D9/14; E21F1/00
Domestic Patent References:
| JP2008019668A | ||||
| JP8135382A | ||||
| JP55031274B2 |
Foreign References:
| WO2009057852A1 |
Attorney, Agent or Firm:
Taketo Okuma
Previous Patent: Throttle device and manufacturing method of throttle device
Next Patent: Paddy field work machine
Next Patent: Paddy field work machine