Deep Shaft Excavation: Design, Construction, and Their Challenges

Abstract

Temporary shafts are constructed to facilitate the jacking and receiving of microtunnel boring machines (mTBM) used in pipe jacking works, hence the terminology ‘jacking’ or ‘launching’ shafts and ‘receiving’ or ‘retrieval’ shafts. Shafts vary in diameters and depths due to the varying lengths and diameters of the jacking pipes used to create the sewer network. The design of shafts is very much aligned to the design of a typical deep excavation.