{"id":87,"date":"2024-04-01T12:48:29","date_gmt":"2024-04-01T12:48:29","guid":{"rendered":"http:\/\/localhost\/blog\/?p=87"},"modified":"2024-07-16T07:02:29","modified_gmt":"2024-07-16T07:02:29","slug":"an-cavity-ak-09-april","status":"publish","type":"post","link":"https:\/\/www.parsan.biz\/blog\/an-cavity-ak-09-april\/","title":{"rendered":"AN-Cavity-AK-09 April"},"content":{"rendered":"\n

Solution processes are a common phenomenon in limestone and dolomite formations which can lead to karstification causing subsurface cavities<\/strong><\/a> in many cases. These cavities can be air-filled or filled with fine-grained material, which decrease the soil stiffness and thus the load bearing capacity. Weak zones in the subsurface are often caused by dissolution and washing out processes, weathering or geological faults. Weak zones lead to a reduction of the rock strength and often have an increased hydraulic permeability. Washing out and solution processes or insufficient sediment consolidation can lead to sudden or long-term subsidence of the subsoil.<\/p>\n\n\n\n

Exploratory drillings, which are generally used for soil investigations, provide only limited information about the subsoil conditions and are not suitable to detect small-scaled structures in a geologically heterogeneous environment. Therefore, geophysical methods are used for a detailed exploration of geological structures and cavities:<\/p>\n\n\n\n

\u2022 Ground Penetrating Radar (GPR)
\u2022 Micro-gravity
\u2022 Resistivity imaging method
\u2022 Seismic Refraction Tomography
\u2022 Multi Channel Analysis of Surface Waces (MASW)
\u2022 Refraction Micro Tremor (ReMi)<\/p>\n\n\n\n

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Important Note: <\/strong>Selection of right geophysical tool is critical for a successful cavity detection project. It depends on factors like geology of the area, depth of expected cavity, minimum size of cavity to be detected, presence of water table, etc. Since every site is unique, geophyscial investigation program needs o be customized to cater fir site specific conditions and deliverables<\/p>\n","protected":false},"excerpt":{"rendered":"

Solution processes are a common phenomenon in limestone and dolomite formations which can lead to karstification causing subsurface cavities in many cases. These cavities can be air-filled or filled with fine-grained material, which decrease the soil stiffness and thus the load bearing capacity. Weak zones in the subsurface are often caused by dissolution and washing out processes, […]<\/p>\n","protected":false},"author":1,"featured_media":88,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-87","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dr-sanjay-rana"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t