Tweet Share

• Send by email

  Send by email

  

  A Case Study on the Design of Pillars at Diverging Area of Urban Underground Road

  In recent years, underground roads in the urban area in South Korea have been planned to be long road tunnels with a depth of 50m or deeper. And the turnout sections that connect to ground roads nearby have also been planned to be built as large cross-section tunnels based on good rock conditions. However, the construction records and design cases involving the ways to secure stability on these large cross-section tunnels and nearby parallel tunnels as well as the methods of excavating those tunnels have been insufficient in Korea. In this regard, this paper seeks to explore design and construction cases in overseas and it verifies the reviews on the minimum separation distance that minimizes damages to the pillars in the diverging area by using the numerical analysis method, focusing on the case of OO Tunnel, a large depth branch tunnel attempted for the first time in Korea. In addition, it intends to propose an excavation method capable of securing the stability of supports used in leading tunnels and ways to assess the stability of supports.

  Recipient :

  Name ^* :

  E-mail address ^* :

  ^* Required fields

  Send   or  Cancel

• Print