Design and Construction of Sewage Structures Under High-Level Underground Water Conditions Using theTop-Down Method: A Case Study of Sewage Pumping Station PS2 in Dorood City

Mirzaei, Bahador; Pirayandeh, Abbas; Emami, Hojjat

doi:10.22093/wwj.2024.416237.3370

Design and Construction of Sewage Structures Under High-Level Underground Water Conditions Using theTop-Down Method: A Case Study of Sewage Pumping Station PS2 in Dorood City

Document Type : Case study

Authors

Bahador Mirzaei ¹

Abbas Pirayandeh ²

Hojjat Emami ³

¹ Senior Structural Engineer and Project/Design Manager, Water and Wastewater Consulting Engineers, Isfahan, Iran

² Chief Executive Officer, Water and Wastewater Consulting Engineers, Isfahan, Iran

³ Head of Civil Engineering Design/Drafting Dept., Water and Wastewater Consulting Engineers, Isfahan, Iran

10.22093/wwj.2024.416237.3370

Abstract

In this paper, various issues related to the design and construction of a pump station under high-level underground water conditions in Dorood City using different approaches are investigated. These methods include deep wells, sheet pile walls, and secant walls. By evaluating the deficiencies of these methods in dealing with high-level underground water conditions, a new approach called the Top-Down method is studied and introduced; it was previously presented for the construction of caissons and buildings. In comparison to other methods, the advantages and disadvantages of the Top-Down method are evaluated, leading to its selection; Subsequently, the problems, including the waterstop placement system and construction details were addressed and modified. Architectural and structural details for the construction of such structures applying the Top-Down method were then presented in the research. Finally, the efficiency and robustness of the proposed approach in the design and construction of concrete sewage structures exposed to high-level underground water, are demonstrated from the technical and economic perspectives, construction time, costs and safety level.

Keywords

Pumping Station

Sewage

Top-Down Method

High Groundwater Level

Subjects

Water and Wastewater Installations

American Concrete Institute, 2006. ACI 350-06, Code Requirements for Environmental Engineering Concrete Structures. USA.

American Concrete Institute, 2019. ACI 318-19, Building Code Requirements for Structural Concrete. USA.

American Society of Civil Engineers, 2016. ASCE/SEI 7-16, Minimum Design Loads and Associated Criteria for Buildings and Other Structures. USA. https://doi.org/10.1061/9780784414248.

British Standards Institution, 1994. BS 8002, Code of Practice for Earth Retaining Structures (AMD 8851) (AMD 12062).

Bowles, J. E. and Gou, Y., 1996. Foundation Analysis and Design, (Vol.5, P.127), McGraw-Hill, New York, USA.

Computers & Structures, Inc., 2017. CSI Analysis Reference Manual for SAP2000, Berkeley, California, USA.

Das, B. M., 2014. Principles of Foundation Engineering, 8^th Edition, Cengage Learning, Boston. MA, USA.

Kara Azmoon Sazeh Azma Consulting Engineering Co., 2020. Geotechnical Report for Pump Station No. 2 in Dorood City. (In Persian)

Li, M. G., Chen, J. J., Xu, A. J., Xia, X. H. and Wang, J. H., 2014. Case study of innovative top-down construction method with channel-type excavation. Journal of Construction Engineering and Management, ASCE, 140(5), 05014003. https://doi.org/10.1061/(ASCE)CO.1943-7862.0000828.

Management and Planning Organization (MPO), Ministry of Energy, Bureau of Technical, Engineering, Social and Environmental Standards of Water and Wastewater, 2016. Design and Analysis of Ground Concrete Water Reservoirs (Code No. 123). (First Revision). (In Persian)

Management and Planning Organization (MPO), Ministry of Energy, Bureau of Technical, Engineering, 2005. Guideline for Design of Retaining Walls. No. 308. (Second Revision). (In Persian)

Nemati, K. M. Tokyo Institute of Technology, Department of Civil Engineering, ATCE-II, Advanced Topics in Civil Engineering, 2005, Construction Dewatering and Ground Freezing, Tokyo, Japan.

Plan and Budget Organization (PBO), Road, Housing & Urban Development Research Center (BHRC), 2021. Iranian Concrete Code No. 120. 3 Volumes (Second Revision). (In Persian)

Road, Housing & Urban Development Research Center (BHRC), 2014. Iranian Code of Practice for Seismic Resistant Design of Building, Standard 2800, 4^th Edition. (In Persian)

Road, Housing & Urban Development Research Center (BHRC), 2020a. Iranian National Building Regulations No. 6. (In Persian)

Road, Housing & Urban Development Research Center (BHRC), 2020b. Iranian National Building Regulations No. 9. (In Persian)

Road, Housing & Urban Development Research Center (BHRC), 2020c. Iranian National Building Regulations No. 10. (In Persian)

Road, Housing & Urban Development Research Center (BHRC), 2020d. Iranian National Building Regulations No. 7. (In Persian)