Hanshin Expressway Company Ltd


Hanshin Expressway Company Ltd

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Taniguchi Y.,Hanshin Expressway Company Ltd | Agemi N.,Hanshin Expressway Engineering Company Ltd
High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium | Year: 2017

Yamatogawa route of Hanshin expressway is an urban tunnel route consisted of cut and cover tunnels. After the recovery of the underground water, many water leakages have been seen at many structural joint of the tunnel. Thermal expansion of the structural joint, resulted by the seasonal thermal fluctuations and direct solar radiation, is considered as the cause of the water leakages. Water leakages will be resulted in bad influences on the durability of the tunnel and also safe driving of cars running through this tunnel. Therefore, installation of adequate structural joint to accommodate thermal expansion at the joint is necessary to prevent water leakage. In order to study the amount of thermal expansion at the structural joint, field measurement of temperature, structural expansion of the joint, and dependency on the over burden depth and the interval of structural joints were investigated. As the result of the investigation, the average 6 mm seasonal expansion was observed at the structural joint with standard interval length of structural joint. Under the from 1 m to 4 m overburden depth, average 5 mm seasonal expansion was also observed. It was based on the special quality of the used material of waterproofing system and the structure by keeping these in mind, and the leaking cause was presumed. The outline which considered new waterproof structure will be reported without changing the present specification substantially. © Springer International Publishing AG 2018.

Ogura N.,Tokyo Institute of Technology | Yatsumoto H.,Hanshin Expressway Company Ltd | Chang K.C.,Kyoto University | Shiotani T.,Kyoto University
Springer Proceedings in Physics | Year: 2017

The steel plate bonding method has been conventionally used on reinforced concrete (RC) slabs of road bridges in Japan as a protection from fatigue damage. As more than 30 years have passed since the first application of this method, some of the RC slabs previously repaired by steel plate bonding started to show debonding of the steel plates (detected by dully sounds) or internal damage of concrete of the slabs. A steel plate-bonded RC slab forms a composite structure of steel and concrete. Its flexural rigidity and other capacities will decrease if the adhesive agent or other material combining the steel and concrete is deteriorated. If the concrete slab itself is damaged significantly, the resistance performance of the composite structure will be affected, irrespective of the bonding condition. However, although the presence or extent of debonding of adhesive agent can be roughly estimated from the change in sound observed during inspection by the hammer impact test, there are no decisive methods for detecting or evaluating the internal damage of the concrete. This study proposes a method for evaluating damage in concrete of RC slabs bonded with steel plates on road bridges in service, using the anchor bolts, which had been installed for holding the steel plates temporarily until complete setting of adhesive agent, as ultrasonic probes. © Springer International Publishing Switzerland 2017.

Onishi K.,Hanshin Expressway Company Ltd | Sato A.,Hanshin Expressway Company Ltd
High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium | Year: 2017

Expressway reinforced concrete slabs designed according to the old design standards are fatigue critical members because of insufficient slab depth and reinforcements. Hanshin expressway, an urban expressway company in Osaka, Japan, has been retrofitting those reinforced concrete slabs by steel plate adhesion method to improve fatigue life since 1980's. According to the most recent studies, internal horizontal cracks are still developing in the retrofitted reinforced concrete slabs; therefore, the remained fatigue life of retrofitted reinforced concrete slabs under current traffic loading is an urgent issue for maintaining expressway slabs in good condition. Under these circumstances, Hanshin expressway conducted the fatigue life study of retrofitted reinforced concrete slabs subjected to wheel loading test using extracted slab specimens from the expressway viaducts under service. According to the results of the wheel loading test with incremental wheel loading condition, the remained fatigue life of the retrofitted reinforced concrete slab with internal horizontal cracks is pretty short compared to the specimen without internal horizontal cracks. The paper will describe the detail results of the wheel loading tests. © Springer International Publishing AG 2018.

Egawa N.,Hanshin Expressway Company Ltd
IABSE Congress Stockholm, 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment | Year: 2016

Hanshin expressway has played an important role of transportation infrastructure supporting the everyday life and economy of the Hanshin Metropolitan Area. The Hanshin Expressway celebrated its 50th anniversary in June 2014, and has faced to so-called aging of structure resulted in serious damage which can't be avoided. Sometimes, such aging structures should be better to replace rather than repeatedly implementing repair activities. This paper summarizes the details of the Hanshin Expressway replacement projects.

Kono Y.,Hanshin Expressway Company Ltd
IABSE Congress Stockholm, 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment | Year: 2016

The Hanshin Expressway was first opened more than 50 years ago in 1962. It has subsequently grown into a network that boasts an operating distance of 259 km and daily traffic of approximately 700,000 units. However, damage has manifested in the expressway because of aging of core structures. To avoid future catastrophic failures due to these damages and road closures associated with them, overall structural replacements (large-scale replacements) are planned. These replacements are planned for 6 segments of the expressway that are not expected to be improved in the future through repair and maintenance.

Kawakam Y.,Hanshin Expressway Company Ltd | Kanaji H.,ATRAS Company Ltd | Oku K.,ATRAS Company Ltd
Procedia Engineering | Year: 2011

Recently, a number of fatigue cracks have been detected in orthotropic steel decks in Japan. An effective inspection method for detecting and monitoring crack is strongly needed. In this study, Field Signature method (FSM), which is one of the Non-destructive inspection methods and has been already applied to detect corrosion or a section reduction of the plumbing in a power station and various plants, was focused. FSM system was applied to a couple of real steel bridges which were under different conditions during this study. Finally, an effectiveness of the system for monitoring fatigue cracks on steel bridges has been verified.

Kim J.,Tohoku University | Kurauchi F.,Gifu University | Uno N.,Kyoto University | Hagihara T.,Hanshin Expressway Company Ltd | Daito T.,Transportation System Studies Laboratory Co.
Journal of Intelligent Transportation Systems: Technology, Planning, and Operations | Year: 2014

In this study, we explored the potential of using electronic toll collection (ETC)-derived data that are a part of intelligent transport systems (ITS). Dynamic origin-destination (OD) traffic volumes were estimated using ETC data on the Hanshin Expressway. A dynamic OD estimation model that was suggested in a previous study was used, and abundant ETC data were input to improve the estimation accuracy. The results of OD estimation were analyzed to understand traffic demand and its variation. External factors were clarified that have an influence on variances in the OD flows, and statistical analysis methods for the variations were proposed depending on the factors. Moreover, the improvements in traffic simulation accuracy and performance as a result of using ETC data as input variables in the simulation models were discussed. According to the results of this study, ETC data have potential to assist in understaningd traffic demand and its variation, and the results can be applied to network management. © 2014 Copyright © Taylor and Francis Group, LLC.

Ushiro M.,Hanshin Expressway Company Ltd | Jidou M.,Hanshin Expressway Technology Center
IABSE Conference, Geneva 2015: Structural Engineering: Providing Solutions to Global Challenges - Report | Year: 2015

In order to maintain the expressway bridge assets based on minimum LCC principle, Hanshin expressway has been developed a bridge management system (H-BMS: Hanshin expressway Bridge Management System) with an estimation system module of bridge condition state by integrated inspection data and a policy making module predicting maintenance budget, repair priority, etc. With the increase of aging structure, the H-BMS should be improved to take into account of drastic large-scale renewal policy from the long term point of view. This paper shows the methodology for calculating performance based soundness indicator as a basic analysis toward development of the new H-BMS.

Mishina Y.,Tokyo Institute of Technology | Taniguchi Y.,Hanshin Expressway Co. | Muromachi Y.,Tokyo Institute of Technology
Transportation Research Record | Year: 2011

Reducing carbon dioxide (CO 2) emissions from passenger cars is important for meeting the long-term Japanese target for reduction of greenhouse gas emissions. Further, decomposition analysis of changes in CO 2 emissions is important for policy making. However, there is a case for concern about the reliability and accuracy of the calculation results obtained by decomposition analysis methods in previous studies related to the residual term. A decomposition analysis method was developed so that the residual term was attributed to a related factor. Changes in regional CO 2 emissions from passenger cars in Japan for 1990 to 2008 were then analyzed with this method. CO 2 emission characteristics are influenced by travel distance, number and weight of passenger cars, actual road fuel efficiency, and population. The main reason for the increase in CO 2 emissions for the period 1990 to 2001 was the increase in the number and weight of passenger cars in all regions of Japan. The main reasons for the decrease in CO 2 emissions in all regions of the country for the period 2001 to 2008 were the decrease in travel distance per passenger car and improvement in actual road fuel efficiency. Population movement from nonmetropolitan regions toward Tokyo and Osaka affected total CO 2 emissions but not significantly.

Yashiro K.,Kobe University | Nishimura H.,Hanshin Expressway Co.
Zairyo/Journal of the Society of Materials Science, Japan | Year: 2014

For a new insight on solid lubricant of fullerenes and onion-like carbons (OLCs), we have performed scratch simulations on isolated fullerenes/OLCs and monolayer film of their array. Here, molecular dynamics simulation may overestimate bond-forming between the scratch surface and target carbons, so that we consider only the van der Waals interaction between the rigid diamond and fullerenes/OLCs. On this condition, both the isolated/layered fullerenes/OLCs doesn't show rotation but slip on the perfect (001) diamond surface, showing frictional coefficient lower than μ=0.05. On the other hand, the fullerenes/OLCs show rotation and higher frictional coefficients of μ=0.1-0.3, if we set surface roughness on both scratch walls. In this rotational friction, larger fullerenes/OLCs show smaller frictional coefficients, and the fullerenes shows higher frictional coefficient than OLCs of same size.©2014 The Society of Materials Science Japan.

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