叠交隧道盾构相向推进施工中的关键技术

A Research of Key Technology of Shield Opposite Advance Construction of Overlapped Tunnels

随着城市轨道交通线网的建设和盾构法隧道的广泛应用,隧道叠交施工作为盾构施工的重大难点受到关注。通常考虑2条叠交隧道的相互影响,均待1条隧道建成并稳定后再实施叠交施工。以叠交隧道盾构相向推进施工为背景,介绍短期内2台盾构相向推进叠交穿越的成功案例,论述盾构施工中的关键技术。

With the developing construction of urban rail transit line network and wide application of shield tunnel, the overlapped tunnels' construction is paid more attention as a significant difficulty in the field of shield construction. Thinking about interaction effects of two overlapped tunnels, the common method is to start overlapped construction after the completion & stabilization of one tunnel. Taking the opposite advance construction of overlapped tunnel for example, a successful case of two shield opposite advancing & overlapping in short-term is introduced and the relevant key technology is discussed on shield construction in this paper.