NDLI: Controlling subsidence caused by de-watering in a deep foundation pit

Content Provider	Springer Nature Link
Author	Wang, Jianxiu Feng, Bo Liu, Yan Wu, Lingao Zhu, Yanfei Zhang, Xingsheng Tang, Yiqun Yang, Ping
Copyright Year	2012
Abstract	In China, more and more underground structures are being built close to buildings of architectural merit. When installing deep foundations, three ways of controlling seepage are suggested. In Mode III, an installed curtain extends partly into the confined aquifer so that the hydraulic connection between the excavated section and the water in the host material is partly isolated. The combined effects of pumping, curtain efficiency and recharge are discussed. Based on the engineering geological conditions of the deep foundation pit of the Yishan Road Station of Metro Line 9, Shanghai, China, in situ pumping and recharge tests were carried out. The combined effects are similar to the results obtained using a three-dimensional finite difference method (FDM) numerical simulation.En Chine, des structures souterraines de plus en plus nombreuses sont construites à proximité de bâtiments présentant un intérêt architectural. Trois moyens de contrôler les écoulements lors de la réalisation des fondations profondes sont suggérés. Dans le Mode III, un rideau d’injection est réalisé, pénétrant partiellement dans l’aquifère captif de sorte que la connexion hydraulique entre le volume excavé et l’eau de la formation hôte est partiellement coupée. Les effets combinés du pompage, du rideau d’injection et d’une recharge hydraulique sont discutés. Considérant les conditions géologiques et géotechniques de l’excavation profonde de la station Yishan Road de la ligne 9 à Shanghai (Chine), des essais de pompages in situ et des essais de recharge hydraulique ont été réalisés. Les effets obtenus sont semblables aux résultats issus d’une simulation numérique basée sur une méthode tridimensionnelle aux différences finies.
Starting Page	545
Ending Page	555
Page Count	11
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	71
Issue Number	3
e-ISSN	14359537
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-04-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rabattement de nappe Contrôle des tassements Effets combinés d’un pompage, d’un rideau d’injection et d’une recharge hydraulique Excavation profonde Essai de pompage Simulation numérique Nature Conservation Geoecology/Natural Processes Geoengineering, Foundations, Hydraulics Geotechnical Engineering & Applied Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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