On Telecoms (Greece)

Commutation phenomena related to the processes of changing the amount of power taken or returned by a vehicle affect the frequency spectrum contained within the traction current. The paper presents the influence of selected physical phenomena on the parameters taken for FFT analysis utilized for assessment of the disturbances generated into the traction network. The paper also describes the stands used for measuring disturbances generated into the traction network. The results of the measurements and calculations of the frequency response of simulated signals are presented, as well as signals measured in real conditions during traction vehicle tests, which are useful for assessing the influence of commutational interferences on the analysis of harmonics in the traction current. Keywords: interferences, EMC, traction, interoperability

This paper covers the planning, design and construction of the KCR Hung Hom Station Modifications, including the patronage forecast, operation planning, railway protection, coordination with East Rail Operations, erection of new midlevel concourse, and column underpinning. The key challenge is on safety, with the construction work in a busy operating railway terminus with over 200,000 passengers a day. Train services, E&M services and evacuation routes must remain un-interrupted at all times. This demands detailed phasing, careful planning of every step, close coordination with station operations, and stringent safety practices. Limited working space and access to track area, with restricted headroom, material handling, and restricted hours during track possession and night works are the constraints. Underpinning of the podium columns and load transfer are technically challenge. Safety to the public, train operation and construction are the top priority over all other concerns. The project management, wit...

This paper reports on the ground investigation carried out for each test pile for a series of nine 30MN full-scale load tests of piles founded on rock. The work was carried out to provide data for the design of over 20km of the Kowloon-Canton Railway Corporation West Rail Project Phase I by foundation contractors. The ground investigation techniques used included Goodman Jack, High Pressure Dilatometer, Self-boring Pressuremeter and Geophysics as well detailed logging of the rock cores and laboratory testing for presentation in Rock Mass Rating (RMR) format. The advantages and limitations of each of the testing techniques are discussed. The paper concludes that the use of published correlations between stiffness and rock mass rating parameters such as RMR and GSI would result in a fivefold overestimate of the stiffness. It is recommended that the stiffness of the rock may be determined using conventional RMR data with the water and joint orientation ratings set to zero. A new coefficient Modified Rock Mass Rating (RM 2 ) is proposed for deep foundations on weathered rock.

The Hong Kong Special Administrative Region (HKSAR) is one of the most densely populated areas in the world, with about 6200 people per square kilometre. Over the next decade, the population will further increase by 1.2 million to more than 8 million. Newly developed areas in the New Territories will see the fastest population growth. This rapid population build-up will require a quantum jump in the provision of public transport to meet the demand of Hong Kong's highly mobile population, who make a total of 13 million passenger trips a day. It was against this background that the plan for a mass transit railway linking Urban Kowloon and North West New Territories was conceived in 1994. After strategy development, feasibility studies, drawing up proposals, technical studies, and detailed design, the Executive Council of the HKSAR gave the final authorisation in September 1998 for the Kowloon-Canton Railway Corporation (KCR) to proceed with the construction of West Rail.

A collaborative case based study has established that Active Networks will have a very significant impact on Network operators. Active Networking appears to be the only route to adding integrated mobility, security, QoS and management services to existing networks. In the short to medium term operators will be keen to use Application Layer Active Networking since the risks are relatively low. However the benefits of moving to stronger forms as research progresses appear compelling.