The El Achour (Algiers, Algeria) landslide delimitation using the H/V ambient vibration method
- PDF / 8,752,274 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 98 Downloads / 189 Views
ARABGU2016
The El Achour (Algiers, Algeria) landslide delimitation using the H/V ambient vibration method Ghani Cheikh Lounis 1 & Omar Mimouni 1 & Djamel Machane 2 & Amina Bacha 3
Received: 31 May 2017 / Accepted: 1 September 2017 # Saudi Society for Geosciences 2017
Abstract We present in this work investigations using seismic ambient vibration to delimitate the El Achour landslide (Algiers), upon which independent geotechnical studies were carried out. Acquisition campaign of ambient vibration on the El Achour site on June 2009 and June 2015, over a surface of about 2 ha, consisted of 64 records of ambient noise with a 10 to 20 m grid size. This approach consists of simple, light, and fast H/V acquisitions, in order to determine the extension of the unstable zone, the depth of the sliding surface, and to test the effectiveness of this method. Two peaks were interpreted as one being for the sliding surface and the other for the lithological interface. As results, in the stable area, they are satisfactory. Indeed, the points in this area are not intermediate peaks which could be related to potential sliding surfaces, which led us to think that we could delineate, using this method, the unstable
This article is part of the Topical Collection on Current Advances in Geology of North Africa * Ghani Cheikh Lounis [email protected] Omar Mimouni [email protected] Djamel Machane [email protected] Amina Bacha [email protected] 1
Université des Sciences et de la Technologie Houari Boumediene (USTHB), BP 32, El Alia, 16111 Algiers, Algeria
2
Centre National de Recherche Appliquée en Génie Parasismique (CGS), Hussein Dey, Algiers, Algeria
3
Univérsité d’Oran2 Mohamed BenMohamed, BP 1015, El M’naouer, 31000 Oran, Algeria
area from the stable area. The HVSR method allows to determine the thickness of the geological formations and to highlight the lateral and vertical facies changes in broad area. Keywords Landslide . H/V method . Seismic ambient vibration . Rupture surfaces . Geotechnical . Algiers
Introduction Several active geophysical methods can be used to identify the geometry of landslides (e.g., Cummings and Clark 1988; Glade et al. 2005; Lebourg et al. 2005). The implementation difficulty and the complexity of the data processing unfortunately remain the main disadvantages of these methods. The passive geophysical methods, which offer the advantage of a light instrumentation and simple data treatment is considered as an interesting alternative (SESAME 2005). Worldwide, several works were conducted for the horizontal-to-vertical (H/V) method and different applications in the field of site effects and engineering (e.g., Chatelain et al. 2000; Chatelain et al. 2008; Guéguen et al. 1998; Guillier et al. 2005; Nakamura 1989; Nogoshi and Igarashi 1971; Mezouar et al. 2007; Machane et al. 2008; Kibboua et al. 2008; Cheikh Lounis et al. 2009; Bensalem et al. 2010; Cheikh Lounis 2011; Cheikh Lounis et al. 2010). The need for understanding the physical phenomenon has led some authors to consider the H/
Data Loading...
