![]() Although these are good general rules, the number, depth and location of boreholes is best determined by the geo-tech engineer. A thumb rule is to take borings at least 10m to either side of bore path. The borings should be near the drill-path to give accurate soil data, but sufficiently far from the borehole to avoid pressurized mud from following natural ground fissures and rupturing to the ground surface through the soil-test bore hole. crossings which are less than 300 m length, as few as three bore log may be sufficient. For long crossings, bore logs are typically taken at 200 m intervals. Geo-tech investigation is performed by analyzing the soil sample extracted from bore-holes drilled along the pipeline route called as bore log data. recent nearby bridge constructions, other pipeline/ cable crossings in the area.) ![]() (Supplementary geo-technical data may be obtained from existing records, e.g. ![]()
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