13 m Stress Relief Modular Wall

摘要

A 13.4 m high modular block wall was built facing a 13.4 m below grade structural building wall. An air gap is present between the walls. The below grade wall was part of a 5 story underground building expansion project at the Minneapolis, Minnesota, USA, Convention Center. The purpose of the modular wall was to prevent the soil lateral earth pressure and surcharge loads from being imposed on the below grade building wall. The modular wall was designed using the National Concrete Masonry Association, USA, design method. Slope inclinometers were installed and measured during and after construction as an aid to evaluate the modular wall facing deflection and performance. This paper describes the alternative wall choices evaluated by the general contractor, the unique project constraints, the wall design, construction and instrumentation.