引细入兰输水工程主洞线地质构造特征

Geologic structural feature of the main tunnel line of YinXiRuLan water delivery engineering

引细入兰输水工程主洞线穿越的岩性是太古界混合岩、混合花岗岩、下元古界辽河群浪子山组二云片岩、变粒岩及白云石大理岩,岩性较简单,但构造较复杂。穿越洞线断层总计有14条。这些较大的断层对洞线均有不同程度的切割和破坏作用。对隧洞施工影响较大的是F4和F18两条断层。发育六组节理,对工程将产生不利影响。

The main tunnel line of YinXiRuLan water delivery engineering passes through migmatite, compoud granite of Archean Erathem, two-mica schist, granulite and dolomite-marble of Langzishan formation, Liaohe group, late Proterozoic Erathem. The lithologic character is simple, but structure is complicated. There are fourteen faults that make a variable degree of cutting and damage to the tunnel, and Fault F4 and F18 have great effect on the tunnel. There are six sets of joints that bring about disadvantage effects.