摘要
本文主要介绍延安东路越江隧道南线2号井工程采用的新型施工方法:先完成地下连续墙,利用大刀盘盾构的切削能力自行穿越地下墙进出2号井,随后明挖顺作至圆形隧道顶2.5m左右,完成中框架,再利用高压旋喷桩围护向下逐节逆作至22.8m。
The paper describes a new construction method used in No. 2 Shaft of South Tube of Yanan Donglu Underriver Tunnel in Shanghai. The construction sequence is as follows :1) Firstly complete di-aphsagm wall; 2) Shield passes directly through No. 2 Shaft; 3) Excavate the shaft by open cut method to the level of 2. 5m higher than the roof of circular tunnel and finish middle framework; 4) Excavate downwards to the level of 22. 8m by the protection and support of chemical churning piles.
