For urban underground development involving tieback anchor excavation support walls, authorities having jurisdiction usually require tiebacks to be de-tensioned before project completion. De-tensioning typically involves the construction of block outs in the permanent concrete basement walls, which are labor intensive to install and backfill, and tend to interrupt the continuity of the basement's waterproofing system.This paper presents a tieback de-tensioning approach that is integrated into the design of the excavation support system: one that maintains the integrity of the waterproofing system and eliminates the need to sequence de-tensioning activities with basement build-out.
展开▼
