Project overview
Deep-rock tunneling, slurry walls and station boxes monitored from 63rd Street through East Harlem.
The Second Avenue Subway expansion is a multi-phase heavy civil infrastructure project managed by MTA Construction & Development to enhance regional transit capacity and alleviate severe congestion along the Lexington Avenue subway line. The project scope encompasses extensive deep-rock tunneling, slurry wall installation, utility relocation, and the construction of modern subterranean station boxes across Upper Manhattan from 63rd Street through East Harlem.
Instrumentation & services deployed
12 types
PS
Pre- & Post-Construction Condition Photo Survey
AMTS
Automated Motorized Total Station
AOP
Airblast Overpressure Microphone
ACM
Automated Crackmeter
CG
Manual Crack Gauge (Tell-Tale)
DMP
Optical Deformation Target / Monitoring Prism
INC
Inclinometer
LLS
Liquid Level Settlement System
PZM
Piezometer
TM
Tiltmeter
UMP
Utility Monitoring Point
VM
Vibration Monitor
Instrument codes follow the legend on the Projects index. Detailed scopes, contract values, and references available on request.
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