Determination of Weathered Layer Thickness Around the Landslide Zone using the Seismic Refraction Method

Preliminary site properties need geophysical methods to determine it, the same as the large use of the seismic refraction method to detect the layers of soil and the depth reaching the bedrock. This study was conducted to find out the subsurface profile characteristics of a backyard field in UTM, Skudai following the principles of this method. The analysis of seismic data processed using ZondST2D software by determining the first arrival time until we get a block model of 2D shape based on the primary propagation of seismic velocity wave’s in soil layers. It was found that the investigated subsurface profile consists of four layers showing the level of weathering grade ranges from 600–4000 m/s based on the classification of rock mass in Malaysia. It was found that weathering rates decreased at higher depth, with the increase of density for the material and dampness reduction of seismic velocity. It was concluded that the survey of seismic refraction in development can be used only for shallow subsurface profiles and far from noise and disturbance.

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DETERMINATION OF DIPS AND DEPTHS OF GEOLOGICAL LAYERS BY THE SEISMIC REFRACTION METHOD

Geophysics ◽

10.1190/1.1437988 ◽

1954 ◽

Vol 19 (2) ◽

pp. 242-254 ◽

Cited By ~ 27

Author(s):

Lindonor Mota

Keyword(s):

Seismic Refraction ◽

Refraction Method ◽

Seismic Refraction Method ◽

Seismic Refraction Data ◽

Refraction Data

Equations are developed for computing depths and dips of 1, 2, 3, ⋯, n inclined interfaces from seismic refraction data without the aid of graphical techniques.

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Determination of the Physical Properties of Near Surface Layers of Omerulu Area, Nigeria, Using Seismic Refraction Method

International Journal of Oil Gas and Coal Engineering ◽

10.11648/j.ogce.20170505.15 ◽

2017 ◽

Vol 5 (5) ◽

pp. 97

Author(s):

Olowofela Joseph Adeniyi

Keyword(s):

Physical Properties ◽

Seismic Refraction ◽

Surface Layers ◽

Near Surface ◽

Refraction Method ◽

Seismic Refraction Method

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Identifikasi Ketebalan Lapisan Lapuk pada Area Rawan Longsor Menggunakan Metode Seismik Refraksi (Studi Kasus: Desa Kalirejo Kabupaten Kulonprogo)

Jurnal Teori dan Aplikasi Fisika ◽

10.23960/jtaf.v8i2.2454 ◽

2020 ◽

Vol 8 (2) ◽

pp. 141-150

Author(s):

Muhardi Muhardi ◽

◽

Radhitya Perdhana ◽

Muhammad Reza July Utama ◽

Mitranikasih Laia ◽

...

Keyword(s):

Wave Propagation ◽

Layer Thickness ◽

Seismic Wave ◽

Slip Surface ◽

Seismic Refraction ◽

Seismic Wave Propagation ◽

Triggering Factors ◽

Refraction Method ◽

On Line ◽

Seismic Refraction Method

Kalirejo Village, Pengasih District, Kulonprogo Regency, is an area that is prone to landslides. The purpose of this study is to identify the weathering layer thickness, which is one of the triggering factors for landslides. This study was conducted using the seismic refraction method by applying two lines. Line 1 uses 24 geophones, has a distance of 1 meter between geophones, while Line 2 uses 24 geophones, has a distance of 2 meters between geophones. The results showed that the velocity of seismic wave propagation in the weathering layer for Line 1 was 400 m/s, and in the slip surface was 2,300 m/s. The weathering layer thickness on Line 1 is 7.6 - 9.8 meters and the slope is steep so that this location is predicted to have a potential landslide. While the velocity of seismic wave propagation in the weathering layer for Line 2 was 300 m/s, and in the slip surface was 2,200 m/s. The weathering layer thickness on Line 2 is at less than 2 meters, so this location is predicted not to have a landslide potential even though the slope is steep

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