Investigating the effect of the presence of suspended water tables formed in the support of dams on the stability of the structure during the operation period and the stabilization Method (case study: Masjid Suleyman dam site)

Document Type : Original Article

Authors

1 Assistant Prof. of enginnering geology, Geology group, Tarbiat Modaress University

2 Department of Engineering Geology of Tarbiat Modares University

Abstract

The construction site of Masjed Soleyman Dam is of considerable importance due to the presence of impermeable clay layers and the conditions for the formation of suspended water aquifers. First, engineering geological studies of the site including office studies, field visits, discontinuities, detailed studies were performed, then using UDEC software, stability analysis and groundwater flow modeling were performed and the results obtained from numerical modeling were in good agreement with the reading. Stretching devices that confirm the accuracy and validity of numerical modeling. According to the results of numerical modeling, the hydrogeological conditions of the site have formed suspended aquifers within the conglomerate and sandstone layers, the lower boundary of which is impermeable clay layers. Because the slope of the stratification is oblique and its direction is inward, the water does not drain easily. Increase in volume), produce and increase pressure on the retaining walls and eventually cause it to crack and fall. In these cases, the use of vertical gravity drains at the top of the slope with greater depth so that it has cut all impermeable layers (clay) and the use of horizontal gravity drains at the bottom of the slope with longer length can reach at least up to the layering boundary to stabilize the structure. Be effective.

Keywords

References

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History

  • Receive Date: 13 March 2021
  • Revise Date: 05 September 2022
  • Accept Date: 05 November 2022

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