| Abstrakt: |
The current article discusses the integrated geotechnical properties of Buraydah City's foundation beds for the purpose of determining their suitability for development projects, identify the engineering problems impacting the foundation beds as a consequence of the geotechnical behavior of the region under study, and recommend an appropriate solution. Furthermore, the stabilization of sand dunes with palm leaf powder (PLP) is suitable for development projects. Basic laboratory tests such as grain size, Atterberg's limits, free swelling test, chemical analysis, direct shear test, and unconfined compressive strength (UCS) was applied to thirty-nine bore holes (189 samples). X-ray diffraction (XRD) and microscopic analysis were also carried out. The ultimate soil bearing capacity (Qu) values of the examined samples range from 888 to 1412 kN/m2, and elastic settlement extends from 5.40 to 7.96 cm. The investigation results of fine-grained soil at foundation levels reveal that the liquid limit (LL) values range from 25.3 to 54.0%, plastic limit (PL) ranges from 19.2 to 28.0%, plasticity index (PI) ranges from 4.4 to 26.0%, and free swelling ranges from 35.0 to 58.0%. Also, the geotechnical properties of soil and rocks are integrated with Geographic Information System (GIS) to produce the geotechnical model. This model is utilized to recognize the geospatial distribution and categorize the geotechnical hazard in Buraydah City. The produced model illustrated that the geotechnical hazard area observed near from King Abdulaziz road south of the study area. Adding palm leaf powder induces the desired geotechnical properties in the soil of sand dunes. [ABSTRACT FROM AUTHOR] |
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