GB 50157-2003 地铁设计规范

2 Terms

2.0.1 Subway, underground railway or subway

It refers to fast and high-capacity urban rail transit adopting power traction. It usually set in tunnel underground, and may be set on ground or overhead at regions out of urban center.

2.0.2 Urban rail transit or mass transit

It refers to high- and medium-capacity urbane public vehicles running on rails of different types, and it is a generic term of urban rail vehicles, such as subway, light rail, monorail, automatic guide and magnetic suspension.

2.0.3 Designed lifetime

It refers to the minimum service life of normal operation under general maintenance conditions.

2.0.4 Operation concept

It is the general definition of operation mode, management method and operation scale of subway system.

2.0.5 Operation speed

It refers to the average operation speed of train from departure station to terminal station.

2.0.6 Gauge

It refers to the line which limits train operation and other structures near rails. It is an indispensable basis which shall be complied with in engineering construction and installation of pipeline and equipment, and it has three types, such as train gauge, equipment gauge and construction gauge.

2.0.7 Main line

It refers to the through line for train operation.

2.0.8 Assistant line

It refers to the operation lines that are set for non-passenger train to guarantee operation of main line.

2.0.9 Connecting line

It refers to the line connecting two independent main lines.

2.0.10 Testing line

It refers to lines used to carried out dynamic performance test to trains and its standard is the same as that of main line generally.

2.0.11 Rack structure

It refers to lines over road bed or structural plane, and is composed og steel rail, fastener, sleeper and ballast.

2.0.12 Gauge of track

It refers to the minimum distance between left and right heads of rail at spcific distance under the rail level.

2.0.13 Seamless track

It refers to steel tracks whose continuous welding or agglutination exceeds twice expansion length.

2.0.14 Monolithic track bed

It refers to track bed cast by concrete.

2.0.15 Subgrade

It refers to infrastructure that is excavated and filled to directly support tracks.

2.016 Computed length of platform

It refers to the length of the maximum train formation length plus the error generated when train parks.

2.0.17 Public zone of station

Public zone of station hall refers to the zone where is used for fare collection and where passengers can reach the train; public zone of platform refers to the zone where passengers can aboard and off the train.

2.0.18 Longitudinal horizontal force of seamless track

It refers to contractility and bending force. Contractility refers to longitudinal force generated by relative displacement of bridge and long steel rail due to temperature fluctuation; and bending force refers to longitudinal force generated by relative displacement of bridge and long steel rail due to train load.

2.0.19 Broken railforce of seamless track

It refers to longitudinal force generated by relative displacement of bridge and long steel rail due to break of long steel rail.

2.0.20 Cut and cover

It refers to the method where tunnel is constructed by digging foundation trench on ground.

2.0.21 Cover and cut-bottom

It is one of cut and cover methods. Through this method, temporary road and support are constructed on ground for maintenance of normal traffic condition, and earth is excavated down to design depth, and then structure is constructed from the bottom up to the ground.

2.0.22 Cover and cut-top down

It is one of cut and cover methods. Construction order of this method is reverse against conventional cut and cover. Through this method, earth is cut, structural top plate and vertical support structure are constructed, and then earth is excavated from above to below under the top plate and structures are constructed layer by layer.

2.0.23 Mining method

Conventional mining method refers to concealment excavation construction method, according to which tunnel is constructed through hole drilling and explosion. With development of technology, modern mining method also includes other construction methods, such as new Austrian tunneling method.

2.0.24 Shield method

It is a kind of concealment tunneling method. Shield is an equipment equipped with steel shell, in which excavation and assembly lining pipe pieces are equipped. Earth excavation, lining building and casting are carried out under protection of the steel shell. Shield can be divided into different types according to differences of excavation methods and sectional forms.

2.0.25 Immersed tube method

It is the abbreviation of immersed prefabricated tube method, which is a kind of construction method to build subaqueous tunnel.

2.0.26 Grade of water proof

It refers to grade standard of water leakage amount that is allowed by structure according to requirement of subway engineering on waterproof.

2.0.27 Deformation joint

It is a general designation of settlement joint and expansion joint.

2.0.28 Rigid-flexible joint of sealed zone

It refers to the zone where back-touch water stop and interlining waterproofer are set and welded at the water face of inner lining of construction joints or deformation joints in inner lining structure, and where sealed zone is formed.

2.0.29 Open made operation

It is one of operation mode of subway tunnel ventilation system and air-conditioning system. During open made operation, air in tunnel is exchanged with external air through fan, duct and wind booth.

2.0.30 Close mode operation

It is one of operation mode of subway tunnel ventilation system and air-conditioning system. During close made operation, subway tunnel is basically isolated from exterior air, and only fresh air that is enough passengers' need will be provided. It is realized by air-conditioning system in station, and by partial station air-conditioning cold air brought by train travel piston effect in interval tunnel.

2.0.3l Piston action ventilation

It is a kind of ventilation formed by piston effect during high speed operation of train in tunnel.

2.0.32 Combined sewer system

It refers to the discharging mode of waster water, such as fire water, rinsing waste water and rainwater, but except sanitary wastewater.

2.0.33 Centralized power supply mode

It refers to exterior power supply mode where power is supplied by special high voltage substation (or power supply switching station) to traction substation and step-down substation.

2.0.34 Distributed power supply mode

It refers to the exterior power supply mode where power is directly supplied by urban medium power supply in-let separately to traction substation and step-down substation.

2.0.35 Combined power supply mode

It refers to exterior power supply where high voltage substation (or power supply switching station) is taken as the main form and urban medium power supply in-let at appropriate place is taken as the assistant form to supply power to traction substation and step-down substation.

2.0.36 High voltage substation

It refers to special high voltage substation which provide medium power supply to subway system after high-voltage power supply led-in from urban grid is stepped down.

2.0.37 Combined substation

It refers to the transformer substation which can supply both DC traction power supply and AC low-voltage power supply for subway system.

2.0.38 Stray current

It refers to electric current that flows on unspecified circuit.

2.0.39 Synchronous digital hierarchy (SDH) transmission system

It refers to system that provides digital transmission channels for various systems.

2.0.40 Global position system (GPS)

It refers to global satellite positioning system, and timing reference signal can be pulled from this system.

2.0.41 Automatic train control (ATC)

It is a generic term for technology, with which subway signal system can realize automatic train supervisory control, safety protection and operation control.

2.0.42 Automatic train supervision (ATS)

It is a generic term of technology which can automatically set access passage, direct train travel and manage train travel according to time table of train operation.

2.0.43 Automatic train protection (ATP)

It is generic term of technology which can automatically control train tracing interval and overspeed protection during train operation.

2.0.44 Automatic train operation (ATO)

It is a generic term of technologies which can automatically control train acceleration, speed adjustment and parking, door opening and closing and prompt.

2.0.45 Centralized traffic control (CTC)

It refers to equipments which can centrally control signals and turnoffs of each stations within line and can direct train operation in the dispatching room of control center.

2.0.46 Moving pavement

It refers to a kind of equipment, also called automatic pavement, which can carry passenger successively and horizontally. Some moving pavement may have flat gradient, whose inclination is between 0-12°

2.0.47 Automatic fare collection

It refers to a kind of equipment, through which passenger can pass the subway station using magnetic card or un-touched IC card, and where no fare collection personnel may not be involved.

2.0.48 Fire alarm system (FAS)

It refers to a system which includes subway fire alarm equipment and fire control equipment that can supervise subway fire disaster and realize interlocking control and which can realize automatic management of subway fire fighting work.

2.0.49 Local alarm system

It refers to simple automatic disaster alarm system composed of alarm controller and fire alarm.

2.0.50 Remote alarm system

It refers to complicated automatic disaster alarm system composed of station disaster alarm controller, disaster detector and computer working station.

2.0.51 Building automatic system (BAS)

It refers to system that can centrally supervise, control and manage environment, air conditioning, ventilation, water supply and drainage, lighting, passenger guide, escalator, lift, shield door and flood-proof door in subway buildings.

2.0.52 System integration (SI)

It refers to that sub-systems with different functions in subway buildings are connected with each other physically and logically through system integration, so as to share integrated information, resources and integral tasks.

2.0.53 Operation control center (OCC)

It is also called control center, where dispatching personnel can supervise, control, harmonize, direct, dispatch and manage all trains, stations and interval equipments in operation through central system equipments, such as signal, power supervision, automatic fire alarm, environment and equipment control, automatic fare collection and communication equipments. In addition, the aforesaid central system equipments are installed in the control center.

2.0.54 Concentration supervisory control and management

It is a generic term for centralized supervision, centralized control, centralized adjustment, centralized direction, centralized dispatching and centralized management.

2.0.55 Depot

It refers to basic production units that are responsible for configuration, management, maintenance, examination and high-grade repair of train.

2.0.56 Stabling yard

It refers to basic production units that are responsible for configuration, management, maintenance and examination of train.

2.0.57 Examine and repair program

It refers to that grade division, which is determined according to technical state and life cycle of train, of train examination and repair. In China, applicable examine and repair program of subway train is classified into five grades, such as factory repair, un-wheeling repair, regular repair, monthly test and routine examination. Among these grades, factory repair, un-wheeling repair and regular repair are prophylactic repair, and monthly repair and routine repair are running repairs.

2.0.58 Examine and repair period

It refers to interval between two examination and repair, and it is usually calculated according to travel distance or time interval.