防磨损是盾构掘进,特别是在含高强度卵石、大粒径漂石地层中长距离掘进施工的重点。本文介绍了依据成都地铁2号线隧道的地层特点,从盾构改造和掘进控制两方面采取的措施,在800m长的含卵石地层掘进中只更换了1次外圈的部分耐磨滚刀,取得了良好的效果。 Wear-resistant shield tunneling, especially in the high-strength pebbles, large-size rock drift strata long-distance construction of the key points. This paper introduces some measures taken from two aspects of stratigraphic characteristics of tunnel tunnel of Chengdu Metro Line 2 and the tunnel reconstruction and tunneling control. In the 800m pebble stratum tunneling, only one part of wear-resistant hob of the outer ring is replaced, got a good result.