Case study on evaluating the groundwater seepage flow by using a 3D ground model prepared from soil borehole and GIS data

Seepage is ubiquitous during tunneling in areas with high groundwater tables. The ground settlement trough on a single tunnel is well described by Peck’s formula, but it cannot reflect the settlement caused by seepage. In this paper, assuming that the groundwater inside and outside the tunnel is a one-dimensional steady-state seepage condition, the groundwater seepage and drainage model of the tunnel was established. Based on the model and the principle of groundwater dynamics, the seepage flow calculation formula was derived, and the dewatering funnel curve equation of the groundwater level surface of a tunnel aquifer was obtained. A case study of a tunnel project in Gansu Province was carried out, and the influence of seepage on the effective stress of the stratum around the tunnel and the calculation of ground settlement caused by seepage were analyzed. The results show that seepage makes the effective stress of the upper soil layer of the tunnel increase, which leads to an increase in ground deformation; when the groundwater level of the tunnel is greatly lowered, the seepage has a significant influence on the vertical deformation of the stratum.

Download Full-text

Simulation of Seepage Flow through Embankment Dam by using a novel Extended Kalman Filter based neural network Paradigm: Case Study of Fontaine Gazelles Dam, Algeria

Measurement ◽

10.1016/j.measurement.2021.109219 ◽

2021 ◽

pp. 109219

Author(s):

Issam Rehamnia ◽

Bachir Benlaoukli ◽

Mehdi Jamei ◽

Masoud Karbasi ◽

Anurag Malik

Keyword(s):

Neural Network ◽

Kalman Filter ◽

Extended Kalman Filter ◽

Seepage Flow ◽

Embankment Dam ◽

Paradigm Case ◽

Flow Through

Download Full-text

GIS development for ground deformation data management. A case study in Cephallonia island (western Greece)

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.17299 ◽

2007 ◽

Vol 40 (4) ◽

pp. 2070 ◽

Cited By ~ 1

Author(s):

S. Vassilopoulou ◽

K. Chousianitis ◽

V. Sakkas ◽

B. Damiata ◽

E. Lagios

Keyword(s):

Spatial Analysis ◽

Data Management ◽

Data Base ◽

Crustal Deformation ◽

Ground Deformation ◽

Heterogeneous Data ◽

Data Vector ◽

Gis Data ◽

Western Greece

The present study is concerned with the management of multi-thematic geo-data of Cephallonia Island, related to crustal deformation. A large amount of heterogeneous data (vector, raster, ascii files) involving geology, tectonics, topography, geomorphology and DGPS measurements was compiled. Crustal deformation was studied using GPS network consisting of '23 stations. This was installed and measured in October 2001 and re-measured during September 2003 following the Lefkas earthquake of August 2003 (Mw=6.2), and also in July 2006. With proper spatial analysis, a large number of thematic and synthetic layers and maps were produced. Simultaneously, a GIS Data base was organized in order to make an easy extraction of conclusions in specific questions.

Download Full-text

The Importance of Teaching GIS in Engineering

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.371.744 ◽

2013 ◽

Vol 371 ◽

pp. 744-748

Author(s):

Tudor Morar ◽

Ion Costescu ◽

Bassian Hissink Muller

Keyword(s):

Network Analysis ◽

Traffic Congestion ◽

Urban Traffic ◽

Infrared Imagery ◽

Density Data ◽

Buffer Analysis ◽

Gis Data ◽

Pedestrian Infrastructure ◽

Housing Units

This paper offers researchers in transport engineering a method for reducing urban traffic congestion by planning for pedestrians. The method is designed for cities where GIS data is unavailable. Showing how this data can be obtained is one of the major contributions to the field. Other contributions are: using density data instead of infrared imagery to populate housing units with the number of inhabitants, performing network analysis instead of buffer analysis, eliminating homogeneity errors of the density dataset and offering a quantitative way of evaluating new investments in pedestrian infrastructure. The method is applied on a case study, namely the Romanian city of Timisoara. The conclusions present some applications of this technology and underline the importance of teaching it in engineering.

Download Full-text