Assessment of Microgravity Anomalies of Soil Structure for Geotechnical 2D Models

Abstract

A microgravity investigation on bedrock topography was conducted at Maluri Park in Kuala Lumpur, Malaysia. The study characterized the subsurface structure to delineate soil structure for the geotechnical application. Cross-section modelling of the residual anomaly generated the Maluri Bouguer Anomaly model for test site. The 2D microgravity models produced the contour map, displaying the characterization due to density contrast in rock types while mapping the subsurface geological structure at different depths. Moreover, a synthetic model was initiated with the assumption of lateral distance on the left and right sides taken at 50 m and a depth of 60 m. The results of modeling confirmed that the soil and rock type composition on models test site, i.e: topsoil (1.1 g/cm3), soil (1.8 g/cm3), clay (1.63 g/cm3), gravel (2.0 g/cm3), sand (1.7 g/cm3), shale (2.40 g/cm3), sandstone (2.76 g/cm3) and limestone (2.9 g/cm3). The 2D gravity synthetic model show a good match with the observed microgravity data.

Mapping of Subsurface Geological Structure and Land Cover Using Microgravity Techniques for Geography and Geophysic Surveys: A Case Study of Maluri Park, Malaysia

“…Anomalies appear in the northeast and northwest. That result in line with the research (Arisona et al, 2018), difference assumed that this contrast is affected by density variations of the host rock and the possibility of rock density. The difference location implies that the anomaly is a result of different depth to the bedrock, different thickness of the overlying material…”

“…It is commonly understood that limestones pose a certain threat to soil structures. As limestones are generally easily dissolved by water, voids and cavities are common internal structures of this type of rock (Arisona et al, 2018). Identification of such structures can help to ensure sustainability, especially for land cover and strategic structures.…”

A Novel Metaheuristic Strategy for the Elucidation of Gravity Anomalies with Application to Geothermal Energy Investigations and Volcanic Activity Studies: Hunger Games Search (HGS)

“…The gravity method in geophysics, a traditional, passive, non-invasive, and costefficient method, measuring the variation in the Earth's gravitational field caused by the difference of rock mass properties at a certain position, has been applied in a large spectrum of projects such as ore/mineral exploration (Hinze, 2013;Chen et al, 2015;Li et al, 2019; Essa and Abo-Ezz, 2021) [1][2][3][4] , archaeology investigation (Branston and Styles, 2006;Batayneh et al, 2010; Sarlak and Aghajani, 2017) [5][6][7] , radioactive waste management (An et al, 2013) [8] , weapons and unexploded ordnances detection (Abedi et al, 2014) [9] , Hydrocarbon/reservoir (oil and gas) recognition (Yuan et al, 2018; Saghafi and Yarveicy, 2019; Cho et al, 2020) [10][11][12] , geothermal energy and volcanic activity study (Altwegg et al, 2015; Uwiduhaye et al, 2018; Essa and Diab, 2022) [13][14][15] , underground cavities or tunnels identification (Pazzi et [16][17][18] , geotechnical and engineering application (Debeglia and Dupont, 2002;Arisona et al, 2018) [19,20] , groundwater monitoring (Frappart and Ramillien, 2018; Delobbe et al, 2018) [21,22] , landfills mapping (Silva et al, 2009;Dumont et al, 2017) [23,24] , subsurface structures imaging...…”

Fault parameters assessment from the gravity data profiles applying the global particle swarm optimization

“…The gravity method is a non-invasive, cost-efficient and passive method, which measures the difference in the Earth's gravitational field at a certain location, caused by the rock mass properties (density). It has been applied in a wide range of projects such as hydrocarbon (oil and gas) exploration (Yuan et al, 2018;Saghafi and Yarveicy, 2019;Cho et al, 2020), underground cavities or tunnels detection (Pazzi et al, 2018;Abdullah et al, 2019;Saddek et al, 2019), geothermal exploration (Altwegg et al, 2015;Uwiduhaye et al, 2018), geotechnical and engineering application (Debeglia and Dupont, 2002;Arisona et al, 2018), weapons and unexploded ordnances inspections (Abedi et al, 2014), archaeology investigation (Branston and Styles, 2006;Batayneh et al, 2007;Sarlak and Aghajani, 2017), monitoring of ground water (Frappart and Ramillien, 2018;Delobbe et al, 2019), mineral and ores exploration (Hinze, 1960;Chen et al, 2015;Essa and Abo-Ezz, 2021), landfills mapping (Silva et al, 2008;Gaël et al, 2017), radioactive waste management (An et al, 2013), mapping of subsurface structures (Chakravarthi et al, 2017;Deng et al, 2016;.…”