|
|
|
| HOW TO CALCULATE RADIUS OF PLASTIC REGION BY APPLYING AND REFORMING KASTNER FORMULA THROUGH PRACTICE OF JIAZHUQING TUNNEL |
| FU Hua-xing |
| China Railway Fifth Engineering Bureau Group Company |
|
|
|
|
Abstract The paper describes the evaluation method for the radius of plastic region by numerical solving through Kastner formula instead of evaluation by discount. It is required that not only the radius of excavation circle, i. e. the shape coefficient formed according to different excavation area should be adopted properly, but also the man-made resistance of support during excavation should be taken into account specially. These two aspects are valuable experiences summarized from construction practice of Jiazhuqing Tunnel.
|
|
Received: 06 September 2002
|
|
|
|
|
|
|
|
|
2003, Vol. 20 
