Underground Train Station Construction and Design Guide – Technical Specifications

Spatial Requirements

Platform Dimensions

Element	Minimum (m)	Optimal (m)	Notes
Platform Length	120-150	160-180	Train dependent
Platform Width	3.0-4.0	4.0-5.0	Peak capacity
Clear Height	3.0	3.5-4.0	Services zone
Emergency Path	1.2	1.5	Both sides
Platform Edge	0.8	1.0	Yellow line

Excavation Methods

Primary Methods

Method	Application	Depth Range (m)	Production Rate
Cut and Cover	Shallow stations	5-20	300-500m³/day
Mining/NATM	Deep stations	20-60	150-250m³/day
TBM Station Box	Platform tunnels	15-45	400-600m³/day
Shaft Sinking	Access/Ventilation	10-100	50-100m³/day

Volume Calculations

Typical Station Box

Component	Volume (m³)	Excavation Factor	Total Volume
Platform Level	25,000-35,000	1.3	32,500-45,500
Concourse Level	15,000-20,000	1.3	19,500-26,000
Entrances	5,000-8,000	1.2	6,000-9,600
Service Rooms	8,000-12,000	1.3	10,400-15,600
Total	53,000-75,000	–	68,400-96,700

Ground Support

Support Systems

Type	Application	Spacing (m)	Capacity
Rock Bolts	Rock mass	1.0-1.5	250-300kN
Shotcrete	Initial support	150-300mm	25-40MPa
Steel Sets	Poor ground	0.6-1.2	Load dependent
Diaphragm Wall	Cut & Cover	0.8-1.2m thick	Design load
Ground Anchors	Wall support	2.0-4.0	500-1000kN

Material Volumes

Construction Materials

Material	Quantity/100m³	Purpose	Specification
Concrete	110m³	Structure	C40/50
Rebar	8-12 tonnes	Reinforcement	Grade 500B
Shotcrete	35m³	Support	C30/37
Waterproofing	250m²	Tanking	2mm membrane

Equipment Requirements

Heavy Equipment

Equipment	Capacity	Number Required	Production
Excavator	30-50 tonnes	2-3	400m³/day
Dump Trucks	20m³	6-8	60 loads/day
Cranes	100-200 tonnes	2	Material handling
Shotcrete Robot	20m³/hr	1-2	Support work

Groundwater Control

Dewatering Systems

Method	Capacity	Coverage	Power Required
Deep Wells	50-100m³/hr	20m radius	15-20kW each
Wellpoints	20-30m³/hr	10m radius	5-10kW each
Sump Pumping	30-50m³/hr	Local	10-15kW each

Time and Cost Analysis

Duration Estimates

Activity	Duration (weeks)	Dependencies	Critical Path
Site Setup	4-6	None	Yes
Main Excavation	30-40	Setup	Yes
Support Installation	20-30	Excavation	Yes
Structure Construction	40-50	Support	Yes
Finishes	20-30	Structure	No

Cost Breakdown (USD/m³)

Activity	Basic	Standard	Complex
Excavation	80-100	100-150	150-200
Support	150-200	200-300	300-400
Disposal	30-50	50-70	70-100
Dewatering	20-30	30-50	50-80

Environmental Considerations

Monitoring Requirements

Parameter	Frequency	Method	Limit
Ground Movement	Daily	Inclinometer	<20mm
Noise	Continuous	Sound meter	<85dB
Vibration	Continuous	Seismograph	<5mm/s
Dust	Daily	PM10 monitor	<50μg/m³
Groundwater	Weekly	Piezometer	Design level

Spoil Management

Material Classification

Type	Volume %	Disposal Method	Cost/m³
Clean Fill	40-50%	Reuse	20-30
Contaminated	10-20%	Treatment	100-150
Rock	30-40%	Crushing/Reuse	40-60
Mixed Waste	5-10%	Landfill	80-120

Structural Elements

Tunnel Construction

Component	Specification	Standard	Material
Main Tunnel	6.0-7.0m dia.	EN 1992	Reinforced concrete
Platform Tunnel	9.0-12.0m span	EN 1992	Shotcrete/RC
Cross Passages	3.0-4.0m wide	Fire rated	Reinforced concrete
Emergency Exits	2.5m minimum	Fire escape	Fire rated
Service Tunnels	3.0m minimum	Access spec	Concrete lined

Passenger Flow

Vertical Transportation

Type	Capacity	Number Required	Backup
Escalators	6000 pph	Min 2 per level	N+1
Elevators	1500 pph	Min 2 per platform	N+1
Emergency Stairs	2500 pph	2 per platform	N/A
Moving Walkways*	7000 pph	Long connections	N+1

*Where applicable

Technical Systems

Ventilation Requirements

System	Capacity	Purpose	Redundancy
Normal Ventilation	6 ACH	Comfort	N+1
Emergency Ventilation	10 ACH	Smoke extract	2N
Platform Edge	8 ACH	Heat removal	N+1
Tunnel Ventilation	Variable	Temperature control	N+1
Station Cooling	350-450W/m²	Comfort	N+1

Power Distribution

Service	Load (kW)	Redundancy	Backup Time
Traction Power	3000-5000	2N	N/A
Station Power	1000-1500	N+1	4 hours
Emergency Systems	300-500	2N	6 hours
Lighting	100-150	N+1	3 hours
Signaling	50-75	2N	6 hours

Safety Systems

Fire Protection

System	Coverage	Response Time	Standard
Sprinklers	Full station	60 seconds	NFPA 130
Smoke Detection	All areas	30 seconds	EN 54
Fire Fighting	100m intervals	2 minutes	Local code
Emergency Lighting	All routes	Instant	EN 1838
Evacuation	Full station	4 minutes	NFPA 130

Emergency Systems

Component	Type	Coverage	Backup
PA System	Voice evacuation	100%	Battery
CCTV	HD/Thermal	Full coverage	UPS
Help Points	Emergency call	50m spacing	Battery
Signage	LED/Photolum	All routes	Self-powered
Communications	Radio/GSM	Full coverage	Battery

Finishes

Platform Materials

Location	Material	Rating	Maintenance
Platform Floor	Granite	R13 slip	Annual polish
Wall Cladding	Vitreous enamel	Fire rated	Washable
Ceiling	Metal panel	Acoustic	Access panels
Edge Strip	Tactile paving	High contrast	Annual check
Screens	Toughened glass	Impact rated	Monthly clean

Cost Estimates (USD millions)

Construction Costs

Element	Basic	Standard	Complex
Civil Works	200-300	300-400	400-500
M&E Systems	100-150	150-200	200-250
Finishes	50-75	75-100	100-150
Systems	75-100	100-150	150-200

Annual Operating Costs

Component	Cost (millions)	% of Total	Frequency
Energy	3-5	30-35%	Monthly
Maintenance	2-3	20-25%	Ongoing
Cleaning	1-2	15-20%	Daily
Security	1-1.5	10-15%	24/7
Staff	2-3	20-25%	Shifts

Environmental Control

Climate Control

Parameter	Range	Control	Monitoring
Temperature	18-26°C	Automated	Real-time
Humidity	40-60%	Passive	Periodic
Air Quality	PM2.5/PM10	Filtered	Continuous
Noise Level	<75dB(A)	Dampening	Continuous