Comparison Between Rectangular Shield Jacking and Pipe Roof via Case Studies

Abstract

The paper will discuss and share the knowledge/experience in the application of rectangular shield jacking method via case study. It will highlight that the basic concept of design, construction and machine manufacture through projects which had been carried out in China and Singapore. Meanwhile, the comparison between different methods of Rectangular shield jacking and Pipe roof will also be made via two example projects which had been executed in China and Singapore. The comparison will focus on not only the cost and quality of projects but also schedule and environment protection of the projects. The Rectangular jacking projects explored in the case study are as followings: 1. Four 4.9m X 6.9m (OD) parallel rectangular jacking project in Foshan, China. The project was completed in 2012. Refer to chapter B in the paper. The pipe roof method jacking project is presented below: 2. 4m X 6m (ID) Outlet Drain at North Buona Vista Road, Singapore. The project was completed in 2005. Refer to chapter C in the paper. In conclusion, this paper deals with the consideration of the design and construction for rectangular shape underground crossings. It also highlights the key issues to be considered in the construction method selection at earlier stage of the project. The problems encountered during the construction, subsequent solutions adopted as well as monitoring of settlement will also be briefly discussed in the paper.

Techniques