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Open AccessArticle

Dewatering Characteristics and Inflow Prediction of Deep Foundation Pits with Partial Penetrating Curtains in Sand and Gravel Strata

1
School of Civil Engineering, Central South University, Changsha 410075, China
2
Key Laboratory of Engineering Structure of Heavy Haul Railway, Central South University, Changsha 410075, China
*
Authors to whom correspondence should be addressed.
Water 2019, 11(10), 2182; https://doi.org/10.3390/w11102182
Received: 2 September 2019 / Revised: 15 October 2019 / Accepted: 17 October 2019 / Published: 19 October 2019
The dewatering of deep foundation pits excavated in highly permeable geology usually requires waterproofing technologies to relieve groundwater flow. However, no effective prediction formula is yet available for determining water inflow in the presence of partial penetrating curtains. In this study, a dewatering project with partial penetrating curtains is analyzed via a finite difference method to show evident three-dimensional (3D) seepage characteristics. The standard curve and distortion functions are established under the assumption of an equivalent well by quantifying the blocking effects; thus, the empirical inflow prediction formulas for steady flow are further developed. Moreover, a dewatering design method based on the prediction formulas is proposed and applied to the field dewatering project in sand and gravel strata. Measured results show that dewatering efficiency is considerably enhanced by 3D flow, forming appropriate pressure distributions for dewatering construction. The uplift pressure below the pit bottom is controlled within a 25% safety margin to verify the reliability of the design method. View Full-Text
Keywords: sand and gravel strata; groundwater flow; partial penetrating curtain; inflow prediction; dewatering scheme design sand and gravel strata; groundwater flow; partial penetrating curtain; inflow prediction; dewatering scheme design
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MDPI and ACS Style

Liu, L.; Lei, M.; Cao, C.; Shi, C. Dewatering Characteristics and Inflow Prediction of Deep Foundation Pits with Partial Penetrating Curtains in Sand and Gravel Strata. Water 2019, 11, 2182. https://doi.org/10.3390/w11102182

AMA Style

Liu L, Lei M, Cao C, Shi C. Dewatering Characteristics and Inflow Prediction of Deep Foundation Pits with Partial Penetrating Curtains in Sand and Gravel Strata. Water. 2019; 11(10):2182. https://doi.org/10.3390/w11102182

Chicago/Turabian Style

Liu, Linghui; Lei, Mingfeng; Cao, Chengyong; Shi, Chenghua. 2019. "Dewatering Characteristics and Inflow Prediction of Deep Foundation Pits with Partial Penetrating Curtains in Sand and Gravel Strata" Water 11, no. 10: 2182. https://doi.org/10.3390/w11102182

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