Dynamic barrier used to solve a large construction dewatering problem

摘要

This paper outlines the description of a dynamic barrier installed between a railroad trench under construction and an existing toxic plume floating on the surface of ground water adjacent to an oil recycling facility. The Alameda Corridor Transportation Authority (ACTA), in April, 2002 completed construction of a 32km railroad transportation project which ranks as one of the largest freight transportation projects ever undertaken and one of national significance. The project includes 16km of surface tracks and a 16km below-surface Trench section along Alameda Street. The Trench portion will carry two railroad tracks beneath existing streets. During Trench construction, significant quantities of toxic waste were encountered in soil and ground water from adjacent facilities. This paper describes one such encounter and the solution chosen to avoid costly construction delays while providing for environmental safeguards.