大连引碧供水北段隧洞工程设计采用新奥法的启示

Design of Tunnel in Water Supply Project of Transferring Water from Biliuhe to Dalian

大连引碧供水北段供水主干渠沿线地质、地形复杂多变，隧洞为主干渠上主要建筑物之一．在隧洞工程设计过程中，初步设计采用传统方法进行；为使采取的施工支护措施所形成的建筑物与永久衬砌及围岩结合为整体并共同工作，提高隧洞的工作能力，降低工程造价，在施工图阶段应用新奥法理论进行了设计．由于新奥法理论目前尚不够完善，设计中参照已建工程确定隧洞支护方案．

Tunnels are the main buildings in Water Supply Projcct of Transferring Water from Biliuhe to Dalian in that the complexity of topography and geologic. Two methods are adopted in the tunnel design: (1 )Proctor method in the pro1iminary design stage ; (2)New Austrian method in the construction design stage in order to combine the surrounding rock and permanent lining into integrity and bear the surrounding load together. Comparing with the Proctor method, the apply of New Austrian method improves the tunnel work capability and lows the engineering cost. In the paper, giving detailed design data and some empiriment discussions in the same time.