Muhammad Hamza Khalid1 and Badee Alshameri This email address is being protected from spambots. You need JavaScript enabled to view it.2

1Postgraduate student, Department of Geotechnical Engineering, NUST Institute of Civil Engineering (NICE), School of Civil & Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Islamabad, Pakistan
2Assistant Professor, Head of Geotechnical Engineering Department, NUST Institute of Civil Engineering (NICE), School of Civil & Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Islamabad, Pakistan


Received: April 6, 2021
Accepted: June 18, 2021
Publication Date: September 9, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Deep excavations are essential to harbor urban needs of the present age. The excavation of pits for foundation construction in an already limited space in urban centers poses damage to the neighboring structures. In this study, two mat foundations on two different types of clay soils have been modeled in PLAXIS to determine the maximum depth of excavation and the minimum safe distance of the excavation pit from these mat foundations. The failure modes under consideration are excessive settlement, angle of distortion of the mat foundation, and pit face failure. A co-relation to determine the safe maximum depth of unsupported excavation pit and minimum horizontal distance from adjacent mat foundation is presented based on results from 195 models. The ratio of critical unsupported excavation depth and critical horizontal distance from an existing building first drops to 1:3 in all cases and then rises in a non-linear manner. The modes of failures at various stages have been highlighted based on 44 critical cases.

Keywords: PLAXIS, Mat Foundation; Cohesive Soils, Unsupported Excavation, Safe Depth, Safe Lateral Distance


  1. [1] K. Al-Kodmany, (2012) “The Logic of Vertical Density: Tall Buildings in the 21st Century City" International Journal of High-Rise Buildings 1(2): 131–148. DOI:10.21022/IJHRB.2012.1.2.131.
  2. [2] B. Toderian, (2011) “The Case for Density in Sustainable Cities" Urban Land, Green:
  3. [3] X. Zhang, J. Yang, Y. Zhang, and Y. Gao, (2018) “Cause investigation of damages in existing building adjacent to foundation pit in construction" Engineering Failure Analysis 83(September 2017): 117–124. DOI: 10.1016/j.engfailanal.2017.09.016.
  4. [4] Q. Zhang, (2020) “Deformation analysis of deep foundation pit excavation in China under time-space effect" Geotechnical Research 7(3): 146–152. DOI: 10.1680/jgere.20.00009.
  5. [5] J. B. Burland and C. P. Wroth, (1974) “Settlement of buildings and associated damage" Settlement of Structures, Proceedings of the Conference of the British Geotechnical Society (April): 611–654.
  6. [6] Z. y. Wang, D. m. Gu, and W. g. Zhang, (2020) “Influence of excavation schemes on slope stability: A DEM study" Journal of Mountain Science 17(6): 1509–1522. DOI: 10.1007/s11629-019-5605-6.
  7. [7] J. Hu and F. Ma, (2018) “Failure Investigation at a Collapsed Deep Open Cut Slope Excavation in Soft Clay" Geotechnical and Geological Engineering 36(1):665–683. DOI: 10.1007/s10706-017-0337-2.
  8. [8] K. Hussain, Z. He, N. Ahmad, M. Iqbal, and S. M. Taskheer mumtaz, (2019) “Green, lean, Six Sigma barriers at a glance: A case from the construction sector of Pakistan" Building and Environment 161(March): DOI:10.1016/j.buildenv.2019.106225.
  9. [9] A. Sivakrishna, A. Adesina, P. O. Awoyera, and K. R. Kumar, (2020) “Green concrete: A review of recent developments" Materials Today: Proceedings 27: 54–58. DOI: 10.1016/j.matpr.2019.08.202.
  10. [10] D. M. Ngoc, N. T. Nu, D. M. Tinh, B. van Loi, and N. T. T. Huong, (2020) “An analytical model for residual stress prediction in rebound deformation of the foundation pit" Journal of Applied Science and Engineering 23(4): 661–668. DOI: 10.6180/jase.202012_23(4).0010.
  11. [11] A. J. Bond, S. Bernd, G. Scarpelli, and T. L. Orr. BS EN 1997-1:2004+A1:2013 Eurocode 7: Geotechnical Design-Part 1: General Rules. 87. 18. 2013, 1–160. DOI: 10.2788/3398.
  12. [12] M. A. Soomro, N. Mangi, W. C. Cheng, and D. A. Mangnejo, (2020) “The Effects of Multipropped Deep Excavation-Induced Ground Movements on Adjacent High-Rise Building Founded on Piled Raft in Sand" Advances in Civil Engineering 2020: DOI: 10.1155/2020/8897507.
  13. [13] S.-d. Dao, (2018) “Prediction of building damage induced by deep excavations in Hanoi, Vietnam" (October): 3–8.
  14. [14] K. N. Dinakar and S. K. Prasad, (2013) “Effect of Deep Excavation on Adjacent Buildings By Diaphragm Wall Technique Using PLAXIS": 26–32.
  15. [15] R. Bakr, (2019) “The Impact of the unsupported excavation on the boundary of the active zone in medium, stiff and very stiff clay" J. Civ. Environ. Eng 9: 1–9. DOI:10.4172/2165-784X.1000327.
  16. [16] S. Likitlersuang, C. Surarak, D.Wanatowski, E. Oh, and A. Balasubramaniam, (2013) “Finite element analysis of a deep excavation: A case study from the Bangkok MRT" Soils and Foundations 53(5): 756–773. DOI: 10.1016/j.sandf.2013.08.013.
  17. [17] Y. Yang, Q.Wang, J. Ma, and F. Huang, (2019) “Parametric analysis of slope stability improved with soilcement using numerical method" Journal of Applied Science and Engineering 22(3): 449–458. DOI: 10.6180/jase.201909_22(3).0006.
  18. [18] Z. Sabzi and A. Fakher, (2015) “The performance of buildings adjacent to excavation supported by inclined struts" International Journal of Civil Engineering 13(1B): 1–13.


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