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http://dx.doi.org/10.7843/kgs.2009.25.5.39

Analysis of Monitoring Results and Back Analysis for Rigid Diaphragm Wall Supported by Ground Anchor  

Lee, Jong-Sung (Civil Research & Engrg. Team, Daelim Industrial Co. Ltd.)
Hwang, Eui-Suk (Civil Research & Engrg. Team, Daelim Industrial Co. Ltd.)
Cho, Sung-Hwan (School of Civil & Environmental Engrg., Yonsei Univ.)
Lee, Jun-Hwan (School of Civil & Environmental Engrg., Yonsei Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.25, no.5, 2009 , pp. 39-46 More about this Journal
Abstract
In this study, behavior of a rigid continuous wall, earth pressure distribution with construction stage, and axial force of earth anchors were evaluated based on field monitoring data and numerical analysis results. For this purpose, a construction site excavated using the diaphragm wall was selected and full instrumentation system was introduced. From monitoring results, it was found that the values of horizontal displacement of the wall measured from the inclinometers, which were installed within the diaphragm wall were similar to analytical value. The earth pressure increased with excavation progress due to jacking force of the ground anchors installed in previous excavation stages. When the excavation depth reached 60% of the final depth, observed earth pressure distribution was similar to that estimated from Peck's apparent earth pressure distribution. When the excavation depth was around 90% of the final depth, values of observed earth pressure showed middle values between those of Peck's and Tschebotarioffs apparent earth pressures. It was also observed that, when excavation depth is deep, values of the earth pressures from the rigid wall were similar to those estimated from conventional earth pressure distribution shape proposed for flexible walls.
Keywords
Back analysis; Deposited soil; Pressure cell; Rigid diaphragm wall;
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