JR East Research Articles

Carbon Neutral Initiatives on Railroads Case Study at JR East Oga Line

1．はじめに

A Study on Earthquake Loading to Secure Safety During Railway Bridge Construction

Railway bridges are widely built based on the national railway network and maintenance plans. As in the case of an earthquake in Pohang, the seismic safety of constructions in Korea is very important in the prevention of disasters. Therefore, the cases of damage caused by earthquakes and additional horizontal forces during bridge superstructure constructions were investigated among domestic and foreign earthquakes, and the details of overseas related design standards were confirmed. The horizontal forces based on the domestic seismic design standard (KDS 24 17 10: 2016) on the PSC beam, PSC box, steel box, and wind load were compared with the design codes based on the Eurocode 8 (Part 2), Japan Railway Technical Research Institute (RTRI), Japan Society of Civil Engineers (JSCE), and East Japan Railway Company (JR East).

Railway vehicle design in JR East

Railway vehicle design in JR East

Inspection and Maintenance Management for Concrete Bridges at JR East

Inspection and Maintenance Management for Concrete Bridges at JR East

Temporary restoration project of BRT instead of restoring railways on Tsunami-hit regions by the Great East Japan Earthquake

Abstract BRT(Bus Rapid Transit) has been provided as a temporary transport restoration project in the wake of the damage by tsunami accompanying the Great East Japan Earthquake, as much time would be required to restore lines to their original state. Issues included safe transport and integration with post-tsunami community planning. Existing bus service could not provide the same level of transportation services as railway in these regions and the assumption was that if this situation lasted long, it would have bad effects on reconstruction. This paper discusses the approach that JR East, with the purpose of contributing to the reconstruction by providing safe and convenient regional transportation services at early stages in those regions, has introduced BRT as a temporary restoration; operating on dedicated busways which had been rail lines before the tsunami. Furthermore, this paper discusses an enhanced level of convenience over previous railway operation, as well as JR East’s efforts to contribute to revitalization and reconstruction in those regions making good use of BRT. Also, based on JR East’s experience with BRT, this paper discusses what will be required of local public transportation in the future under the existing conditions.

Data Utilization and Technology Innovation in JR East

Data Utilization and Technology Innovation in JR East

JR 東日本（株）の運転士養成における安全教育，体験教育

JR 東日本（株）の運転士養成における安全教育，体験教育

Agile Development of JR East App Designed to Enhance Customer Service Quality

Agile Development of JR East App Designed to Enhance Customer Service Quality

Toshiba autonomous hydrogen energy for Kyushu hotel, JR East

Toshiba autonomous hydrogen energy for Kyushu hotel, JR East

Engineer’s Trainninngu Program of JR East Tokyo Electric Construction & System Integration Office

Engineer’s Trainninngu Program of JR East Tokyo Electric Construction & System Integration Office

Ticketing Machines of JR East

Ticketing Machines of JR East

1C22 Introduction with new methods for train operation control in strong winds at JR East(Safety-Infrastructure)

1C22 Introduction with new methods for train operation control in strong winds at JR East(Safety-Infrastructure)

Innovative Changes for Maintenance of Railway by Using ICT–To Achieve “Smart Maintenance”

Because of the information revolution of the late 20th century, railway operators have made a chance to realize innovative change in railway maintenance. The Research and Development Centre of JR East Group has proposed “the Smart Maintenance Initiative” as 21st century innovation in maintenance of railway equipment. And Technical Center, which is a part of this center, treats the subjects of almost field relating railway maintenance (for example, rolling stock, track, civil engineering structures, electric & signal facilities).This paper describes the overview of “the Smart Maintenance Initiative” and our latest R&D activities such as high-frequency monitoring equipment, and analysis methods to observe degradations of facilities by gained data.

JR東日本における混和材使用の現状と課題

JR東日本における混和材使用の現状と課題

1207 新幹線車両の車内騒音低減に向けたJR東日本の取組み(OS1-2 鉄道の騒音・空力・軌道と航空管制,OS1 交通・物流システムの高速化,利便性,快適性の向上,オーガナイズド・セッション(OS))

Silence in the interior of a vehicle is indispensable for a passenger taking a Shinkansen vehicle to have a comfortable time. However, in JR East, since we are working for the further speed up of Shinkansen, the silence in the interior of a vehicle is declining with further speed up and interior noise tends to be increasing. Therefore, many measures have been taken to reduce the interior noise for keeping the silence in the interior of a vehicle. In this study, representative measures, after classified to each cause of the interior noise, are introduced, which are selected by usefulness of the developments produced by JR East to reduce the interior noise in Shinkansen vehicles.

アルカリ骨材反応のJR東日本版抑制策の制定について

アルカリ骨材反応（アルカリシリカ反応：以下ASRという）の抑制対策がJIS規格による規制として始まってから相当の期間が経過している。これまでコンクリート用骨材についてJIS規格によるASR抑制策により，その効果が発揮されているものと考えられる。しかし，現場で用いられたコンクリートの中にJIS規格によって「無害」と判定された骨材を用いたコンクリート構造物でASRによる劣化損傷が生じており問題となることがある。JR東日本では，現行のJIS規格で用いている骨材試験方法を変更することなく骨材の判定方法を2区分から3区分に設定し，抑制対策として抑制効果の高い混合セメントを主体とした方法で実施することとしたものである。

Social efficiency benchmarking of Japanese domestic transport services: A comparison of rail and air

The environmental impact of CO 2 emissions has attracted increasing attention in recent years, which has redefined the modal choice between air and rail transport. Transport service provision via railway involves less marginal environmental damage than air transport, yet it entails a higher emissions burden in its infrastructure construction stage. This paper empirically investigates the environmental burden of these two transport modes by taking into account the CO 2 emissions from both transport service provision and infrastructure construction. Using a panel data set from 1999 to 2007 for three Japanese railway companies and the Japanese air transport industry, which are treated as decision-making units (DMUs), this paper estimates the social efficiency of these DMUs via a nonparametric productivity measurement method that incorporates economic bads as undesirable outputs. The aviation industry is shown to be efficient, whereas results for the railway industry are mixed: JR East is efficient, JR West is inefficient throughout the observation period, and JR Tokai substantially improved its efficiency during the period to become an efficient company in 2007.

2108 蓄電池駆動電車システムの開発(OS6 環境負荷低減,オーガナイズド・セッション(OS))

JR East developed a diesel and storage battery hybrid train to decrease negative environmental impact and the operation has been done since 2007. JR East is developing "Catenary and battery powered hybrid train system" as a new system. This document introduces the battery charging facilities, and result of rapid charging test.

A STUDY ON THE INSTALLATION INTERVAL OF RAIN GAUGE FOR RAILROAD

Train operation is stopped to ensure safety when the precipitation observed by a rain gauge exceeds a predetermined value. This paper proposes a method to determine the installation interval of rain gauges for railroads suitable for hourly precipitation which is often used as the index of rainfall intensity. The installation interval of rain gauges is evaluated from viewpoint of both safety and reliability of train operation, based on the spatial distribution of precipitation observed by rain gauges. The results is that when the installation interval of rain gauges is reduced from 10 km, the current standard in JR East’s, to 5km, the rate of increase in safety exceeds the rate of decrease in reliability. The conclusion is, therefore, the installation interval of rain gauges should be set at 5 km.

Anti-Earthquake Measures of JR East

Anti-Earthquake Measures of JR East