Soil Investigation

The structures will be stability and safty, must be supported by indissoluble foundation and also foundation design should be safe enough. Soil test and soil investigation is very important. The enables engineer to design a safty foundation by foundation engineering method and construction cost savings. Normally the price of soil investigation should be between 0.1 – 0.5 % of the total construction cost. Scope and details of soil investigation task depends on the qualities of the project and soil condition. Civil Engineer must be assignment the details of soil investigation so that to have the data essential for analysis and design. Sub soil conditions in various areas of thailand may have a variance so that the area is different from the general area such as very loose sand, soft clay layer or depth of soil is strength and high variability, etc. This could be the cause of the failure of the foundation that causing unpredictable damage. Therefore the good project owner should focus on soil investigation for designing various buildings is circumspect and invalid by engineering method. Soil Test have the following elements : atterberg's limits test, unconfined compression test, sieve analysis, soil classification, total unit weight, water content, compaction test, cbr test, triaxial test, consolidation test, direct shear test, specific gravity of soil. Soil test is the key success factor of soil investigation.