Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

An excavation, rectangular in dimensions of 55 m x 95 m at the base and approximately 120 m x 160 m at the ground surface was made possible by the use of multi-staged wellpoint dewatering system. Groundwater table was lowered more than 20 meters using four stage wellpoint system to construct the main wastewater pump station for the city of Izmir. The most significant soil parameter affecting the planning and design of the dewatering work is the coefficient of field permeability, and it has been directly measured by a large scale pumping test at the site. During dewatering and construction stages, piezometers, inclinometers, extensometers and both conventional surveying and EDM methods were used. Total discharge rate was measured at different stages and it is compared with the theoretical approaches. Partial penetration factor for the well into aquifer is estimated.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Jun 1st, 12:00 AM

Dewatering of a Large Excavation Pit by Wellpoints

St. Louis, Missouri

An excavation, rectangular in dimensions of 55 m x 95 m at the base and approximately 120 m x 160 m at the ground surface was made possible by the use of multi-staged wellpoint dewatering system. Groundwater table was lowered more than 20 meters using four stage wellpoint system to construct the main wastewater pump station for the city of Izmir. The most significant soil parameter affecting the planning and design of the dewatering work is the coefficient of field permeability, and it has been directly measured by a large scale pumping test at the site. During dewatering and construction stages, piezometers, inclinometers, extensometers and both conventional surveying and EDM methods were used. Total discharge rate was measured at different stages and it is compared with the theoretical approaches. Partial penetration factor for the well into aquifer is estimated.