A case study on trench collapse of deep diaphragm wall

Jing-Wen Chen, Fu Cheng Chen

研究成果: Conference contribution

1 引文 (Scopus)

摘要

This paper presents a remedy case of a large-scaled trench collapse during the construction of a deep cylindrical diaphragm wall located in the south of Taiwan. Through a well-organized field monitoring system and suitable countermeasures, the potential disaster was mitigated in time. Thirty-two panels in total were designed to form the 70 m-diametered diaphragm with 1.2 m thickness and 90 m depth. During the trench excavation, a deep and large collapse of soils, approximately 110 m3, occurred at the depth of GL.-43 m to GL.-52 m in the trench. The overlapped reinforcing bars (rebar) of previously installed panels were serious deformed and impeded the coming rebar cage insertion. A series of monitoring activities including ultrasonic sounding and piezometer measurement was performed to figure out the causes and damaged situation. Relevant remedial measures as well as the monitoring data during the post-treatment are addressed. Three main concerns are concluded: (1) a well-organized field monitoring system during construction would be helpful for judgment in case any accident occurred, (2) an improper construction activity using percussion drill inside the coming-close cylindrical diaphragm wall built up the excess pore water pressure of the confined aquifer at the collapse depth and resulted in the serious collapse, and (3) the long stand-by duration of the excavated trench would increase the possibility of collapse.

原文English
主出版物標題FMGM 2007 - Proceedings of the 7th International Symposium on Field Measurments in Geomechanics
頁數1
版本175
DOIs
出版狀態Published - 2007 十二月 1
事件7th International Symposium on Field Measurements in Geomechanics, FMGM 2007 - Boston, MA, United States
持續時間: 2007 九月 242007 九月 27

出版系列

名字Geotechnical Special Publication
號碼175
ISSN(列印)0895-0563

Other

Other7th International Symposium on Field Measurements in Geomechanics, FMGM 2007
國家United States
城市Boston, MA
期間07-09-2407-09-27

指紋

diaphragm wall
diaphragm
Diaphragms
trench
case studies
Monitoring
monitoring
monitoring system
piezometers
disasters
accidents
Aquifers
Excavation
Disasters
aquifers
piezometer
confined aquifer
Taiwan
ultrasonics
Accidents

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

引用此文

Chen, J-W., & Chen, F. C. (2007). A case study on trench collapse of deep diaphragm wall. 於 FMGM 2007 - Proceedings of the 7th International Symposium on Field Measurments in Geomechanics (175 編輯). (Geotechnical Special Publication; 編號 175). https://doi.org/10.1061/40940(307)27
Chen, Jing-Wen ; Chen, Fu Cheng. / A case study on trench collapse of deep diaphragm wall. FMGM 2007 - Proceedings of the 7th International Symposium on Field Measurments in Geomechanics. 175. 編輯 2007. (Geotechnical Special Publication; 175).
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Chen, J-W & Chen, FC 2007, A case study on trench collapse of deep diaphragm wall. 於 FMGM 2007 - Proceedings of the 7th International Symposium on Field Measurments in Geomechanics. 175 edn, Geotechnical Special Publication, 編號 175, 7th International Symposium on Field Measurements in Geomechanics, FMGM 2007, Boston, MA, United States, 07-09-24. https://doi.org/10.1061/40940(307)27

A case study on trench collapse of deep diaphragm wall. / Chen, Jing-Wen; Chen, Fu Cheng.

FMGM 2007 - Proceedings of the 7th International Symposium on Field Measurments in Geomechanics. 175. 編輯 2007. (Geotechnical Special Publication; 編號 175).

研究成果: Conference contribution

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Chen J-W, Chen FC. A case study on trench collapse of deep diaphragm wall. 於 FMGM 2007 - Proceedings of the 7th International Symposium on Field Measurments in Geomechanics. 175 編輯 2007. (Geotechnical Special Publication; 175). https://doi.org/10.1061/40940(307)27