岩溶发育区复合地层盾构刀具选型研究与应用

Research and Application of Shield Cutter Selection in Composite Stratum under Karst Development Area

岩溶发育区复合地层地质条件复杂,采用盾构法施工风险高,易出现刀具异常失效等问题。为此,分析该类地层造成刀具异常失效的主要地质风险因素,确定适用于岩溶发育区复合地层的主切削刀具类型。采用模糊理论进行刀具选型,运用刀具综合评判方法得到最终刀具选型方案,形成一套适用于岩溶发育区复合地层盾构刀具选型方法。应用该方法对徐州地铁2号线周庄站-七里沟站区间盾构进行刀具配置,工程应用表明该方法具备可行性。

Due to the complex geological conditions of composite strata in karst development area,the risk of shield construction is high in this kind of stratum,and it is easy to cause abnormal failure of cutters.Therefore,the main geological risk factors causing the abnormal cutter failure in this kind of stratum were analyzed,and the main cutting tool type suitable for the composite stratum in karst development area was determined.The fuzzy theory was used to select cutter type,and the cutter comprehensive evaluation method was used to obtain the final cutter selection scheme,and then a set of cutter selection method suitable for the composite stratum in karst development area was formed.This method was applied to the shield cutters configuration for the interval shield tunneling from Zhouzhuang station to Qiligou station of Xuzhou metro line 2.The engineering application shows that this method is feasible.