| 摘要 |
The present invention provides a non-open cut tunnel construction method using a multistage small diameter steel pipe. The non-open cut tunnel construction method using a multistage small diameter steel pipe comprises a pile and working hole constructing step for constructing two working holes (B) at both ends of the ground in which a tunnel is to be constructed (1); an upper top steel pipe installing step for drilling the ground in a horizontal direction to indent an improved pipe (100`) into the drilled hole (2); a lower top steel pipe installing step for drilling the ground in a horizontal direction to indent a steel pipe (100) into the drilled hole (3); a top excavating and supporting step for installing a plurality supporting steel plates (200) and supports (300) (4); an upper concrete forming step for arranging re-bars between the improved pipe (100`) and the steel pipe (100) and injecting concrete (C) to form an upper plate concrete slab (US) (5); a sidewall steel pipe installing step for drilling the ground to indent the steel pipe (100) into the drilled hole (6); a concrete sidewall forming step for forming two concrete sidewalls (CW) in a vertical manner (7); an upper bottom steel pipe installing step for drilling the ground in a horizontal direction to indent the steel pipe (100) into the drilled hole (8); a lower bottom steel pipe installing step for indenting a plurality of steel pipes (100) into the lower bottom of the tunnel (9); a bottom excavating step for excavating a space between the steel pipes (100) installed at the lower top and bottom of the tunnel (10); a lower concrete forming step for arranging re-bars between the steel pipes (100) installed at the lower top and bottom of the tunnel to inject concrete (C) (11); and a tunnel inside excavating step for excavating soil (12). [Reference numerals] (1) Pile and working hole constructing step; (10) Lower drilling step; (11) Lower concrete forming step; (12) Tunnel inside excavating step; (13) Inside steel pipe recovery step; (2) Upper top steel pipe installing step; (3) Upper bottom steel pipe installing step; (4) Top excavating and supporting step; (5) Upper concrete forming step; (6) Sidewall steel pipe installing step; (7) Concrete sidewall forming step; (8) Lower top steel pipe installing step; (9) Lower bottom steel pipe installing step; (BB) Internet |
