Skip to main content
Top
Published in: Hydrogeology Journal 7/2019

22-06-2019 | Paper

Experimental investigation on the blocking of groundwater seepage from a waterproof curtain during pumped dewatering in an excavation

Authors: Ye-Shuang Xu, Xue-Xin Yan, Shui-Long Shen, An-Nan Zhou

Published in: Hydrogeology Journal | Issue 7/2019

Log in

Activate our intelligent search to find suitable subject content or patents.

search-config
loading …

Abstract

The interaction between a waterproof curtain and withdrawal wells (or simply, the wall-well effect) is a key factor in controlling the environmental effects that occur during the dewatering of foundation pits. A series of laboratory investigations was conducted to study the changes in groundwater level during dewatering. The influence of the buried depth of the waterproof curtain placed in a dewatering confined aquifer (D), and the filter length of the pumping well (L), is investigated. Based on the laboratory test results, numerical simulations are used to analyse the ground settlement. The relationship between the approximate hydraulic gradients on both sides of the wall (Δi), or the ground settlement outside the excavation (S), using ratio RD (D divided by the thickness of the confined aquifer) or ratio RL (L divided by the thickness of the confined aquifer), can be simulated using a Boltzmann curve. The value of Δi increases while S decreases with an increase in RD, whereas Δi decreases while S increases with an increase in RL. The value of the contraflexure point of the Boltzmann curve is regarded as the effective value of RD or RL. Based on a comprehensive consideration, RD is suggested to be equal to or larger than the effective value, and RL is suggested to be equal to or lesser than the effective value.

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 102.000 Bücher
  • über 537 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 390 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Maschinenbau + Werkstoffe




 

Jetzt Wissensvorsprung sichern!

Literature
go back to reference ASTM (2002) ASTM D5084: standard test method for measurement of hydraulic conductivity of saturated porous materials using a flexible wall parameter. American Society for Testing and Materials, Philadelphia ASTM (2002) ASTM D5084: standard test method for measurement of hydraulic conductivity of saturated porous materials using a flexible wall parameter. American Society for Testing and Materials, Philadelphia
go back to reference ASTM (2006) ASTM D4254: standard test methods for maximum index density and unit weight of soils and calculation of relative density. American Society of Testing and Materials, West Conshohocken, PA ASTM (2006) ASTM D4254: standard test methods for maximum index density and unit weight of soils and calculation of relative density. American Society of Testing and Materials, West Conshohocken, PA
go back to reference ASTM (2007) ASTM D422–63(2007) e2, standard test method for particle-size analysis of soils (withdrawn 2016). American Society of Testing and Materials, West Conshohocken, PA ASTM (2007) ASTM D422–63(2007) e2, standard test method for particle-size analysis of soils (withdrawn 2016). American Society of Testing and Materials, West Conshohocken, PA
go back to reference ASTM (2009) ASTM D7263: standard test methods for laboratory determination of density (unit weight) of soil specimens. American Society of Testing and Materials, West Conshohocken, PA ASTM (2009) ASTM D7263: standard test methods for laboratory determination of density (unit weight) of soil specimens. American Society of Testing and Materials, West Conshohocken, PA
go back to reference ASTM (2012) ASTM D698: standard test methods for laboratory compaction characteristics of soil using standard effort. American Society of Testing and Materials, West Conshohocken, PA ASTM (2012) ASTM D698: standard test methods for laboratory compaction characteristics of soil using standard effort. American Society of Testing and Materials, West Conshohocken, PA
go back to reference Huang QX, Zhang WH, Hou ZH (2010) Study of simulation materials of aquifuge for solid-liquid coupling (in Chinese). Chin J Rock Mech Eng 5(Suppl 1):2813–2818 Huang QX, Zhang WH, Hou ZH (2010) Study of simulation materials of aquifuge for solid-liquid coupling (in Chinese). Chin J Rock Mech Eng 5(Suppl 1):2813–2818
go back to reference Tan Y, Lu Y, Wang D (2018) Deep excavation of the gate of the orient in Suzhou stiff clay: composite earth-retaining systems and dewatering plans. J Geotech Geoenviron 144(3):05017009CrossRef Tan Y, Lu Y, Wang D (2018) Deep excavation of the gate of the orient in Suzhou stiff clay: composite earth-retaining systems and dewatering plans. J Geotech Geoenviron 144(3):05017009CrossRef
go back to reference Tan Y, Wei B, Lu Y, Yang B (2019) Is basal reinforcement essential for long and narrow subway excavation bottoming out in Shanghai soft clay? J Geotech Geoenviron 145(5):05019002CrossRef Tan Y, Wei B, Lu Y, Yang B (2019) Is basal reinforcement essential for long and narrow subway excavation bottoming out in Shanghai soft clay? J Geotech Geoenviron 145(5):05019002CrossRef
Metadata
Title
Experimental investigation on the blocking of groundwater seepage from a waterproof curtain during pumped dewatering in an excavation
Authors
Ye-Shuang Xu
Xue-Xin Yan
Shui-Long Shen
An-Nan Zhou
Publication date
22-06-2019
Publisher
Springer Berlin Heidelberg
Published in
Hydrogeology Journal / Issue 7/2019
Print ISSN: 1431-2174
Electronic ISSN: 1435-0157
DOI
https://doi.org/10.1007/s10040-019-01992-3

Other articles of this Issue 7/2019

Hydrogeology Journal 7/2019 Go to the issue