百色水利枢纽导流隧洞施工

Baise multi-purpose dam project diversion tunnel construction

百色水利枢纽施工导流隧洞Ⅱ～Ⅲ类围岩洞段占46%,Ⅳ～Ⅴ类围岩洞段占54%,开挖洞径约15m,分别采用分台阶的全断面法、中导洞法、预留核心土环法开挖,采用喷锚和模注混凝土支护,效果好。

The hole length of type ⅡⅢ surrounding rock of BMDP diversion tunnel is 46%, the hole length of type Ⅳ～Ⅴ is 54%, the diameter of tunnel excavation is about 15m, their excavation ways applied separately all section method, midguide tunnel method and reserved core soil cycle method. And used blowing anchor and modeinjection concrete for support. The effect was well.