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Prediction of Surface Settlement Due to Deep Excavation in Indo-Gangetic Plain: A Case Study

  • M. S. AswathyEmail author
  • M. Vinoth
  • Achal Mittal
  • Siddharth Behera
Case Report
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Abstract

Excessive settlement occurred during the installation of collection chamber of sewage pumping station induced minor-to-major damages in the adjacent structures which cautioned the authorities. CSIR-Central Building Research Institute, India, investigated and identified the cause and control further damages to the adjacent structures due to excavation construction. Initial study revealed that excessive settlement occurred due to dewatering carried out after the installation of collection chamber by well sinking method. The presence of soft soil and high water table caused soil movement towards the collection chamber, leading to severe settlement issues. This necessitated a proper study before carrying out further excavation of the adjacent inlet and screen chambers. The evaluations for the remaining two chambers have been carried out using numerical analysis by finite element method and supplemented by comparing with existing analytical approaches and field values. Based on this study, a robust as well as economical shoring scheme is suggested to cater for minimal damage to the nearby buildings.

Keywords

Settlement FEM Underwater grouting Propped support system Wall deflection 

Notes

Acknowledgements

The authors are thankful to the Director, CBRI, for granting permission in publishing the research work. The authors would also like to acknowledge Ms. Aradhna Sharma for her contribution in carrying out the analytical study.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Indian Geotechnical Society 2019

Authors and Affiliations

  1. 1.CSIR-Central Building Research InstituteRoorkeeIndia

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