Experimental Investigation on Flexural Behaviors in Framed Structure of PST Method
Existing underground pipe jacking methods use a
reinforcing rod in a steel tube to obtain structural stiffness. However,
some problems such as inconvenience of works and expensive
materials resulted from limited working space and reinforcing works
are existed. To resolve these problems, a new pipe jacking method,
namely PST (Prestressed Segment Tunnel) method, was developed
which used joint to connect the steel segment and form erection
structure. For evaluating the flexural capacity of the PST method
structure, a experimental test was conducted. The parameters
considered in the test were span-to-depth ratio of segment, diameter of
steel tube at the corner, prestressing force, and welding of joint. The
flexural behaviours with the effect of load capacity in serviceability
state according to different parameters were examined.. The frame
with long segments could increase flexural stiffness and the specimen
with large diameter of concave corner showed excellent resistance
ability to the negative moment. In addition, welding of joints increased
the flexural capacity.
[1] T. Nanno, "A method for driving curved pipe-jacked tunnels," Trenchless
Technol. Res., vol. 11, pp. 3-25, Dec. 1999.
[2] D. C. Mathy, R. A. Kahl, "TBM vs. MTBM: Geotechnical
considerations," in Proc. 2003 Int. Conf. Pipeline Engineering and
Construction, pp. 1261-1270.
[3] C. S. Yoo, "Deformation behavior of tunnel face reinforced with
longitudinal pipe-laboratory and numerical investigation," Tunneling and
Underground Space Technology, vol. 18, pp. 303-319, Nov. 2002.
[4] K. K. Kim, "A study on the structural safety of the complex underground
structure using steel tubular roof," Master Thesis in Yonsei University,
2007.
[5] KSCE, "Bridge Design Specification," Korea Society of Civil Engineer,
2005.
[1] T. Nanno, "A method for driving curved pipe-jacked tunnels," Trenchless
Technol. Res., vol. 11, pp. 3-25, Dec. 1999.
[2] D. C. Mathy, R. A. Kahl, "TBM vs. MTBM: Geotechnical
considerations," in Proc. 2003 Int. Conf. Pipeline Engineering and
Construction, pp. 1261-1270.
[3] C. S. Yoo, "Deformation behavior of tunnel face reinforced with
longitudinal pipe-laboratory and numerical investigation," Tunneling and
Underground Space Technology, vol. 18, pp. 303-319, Nov. 2002.
[4] K. K. Kim, "A study on the structural safety of the complex underground
structure using steel tubular roof," Master Thesis in Yonsei University,
2007.
[5] KSCE, "Bridge Design Specification," Korea Society of Civil Engineer,
2005.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:52330", author = "S. Hong and H. Kim and D. Cho and S. Park", title = "Experimental Investigation on Flexural Behaviors in Framed Structure of PST Method", abstract = "Existing underground pipe jacking methods use a
reinforcing rod in a steel tube to obtain structural stiffness. However,
some problems such as inconvenience of works and expensive
materials resulted from limited working space and reinforcing works
are existed. To resolve these problems, a new pipe jacking method,
namely PST (Prestressed Segment Tunnel) method, was developed
which used joint to connect the steel segment and form erection
structure. For evaluating the flexural capacity of the PST method
structure, a experimental test was conducted. The parameters
considered in the test were span-to-depth ratio of segment, diameter of
steel tube at the corner, prestressing force, and welding of joint. The
flexural behaviours with the effect of load capacity in serviceability
state according to different parameters were examined.. The frame
with long segments could increase flexural stiffness and the specimen
with large diameter of concave corner showed excellent resistance
ability to the negative moment. In addition, welding of joints increased
the flexural capacity.", keywords = "PST method, Pipe jacking method, Flexural behavior,Prestressed concrete.", volume = "5", number = "3", pages = "575-6", }