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ITU-T L.257/L.39 (05/2000)

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Investigation of the soil before using trenchless techniques
This Recommendation describes the main techniques that allow an investigation of the soil in order to get information about the position of buried objects and the nature of the ground. This data is necessary to plan the execution of work using trenchless techniques and to optimize the drilling path thus avoiding the risk of damage to both the existing infrastructures and the drilling equipment; hence preventing drilling failures due to obstacles or ground characteristics.This Recommendation gives advice on general requirements of the three different phases in which the investigation work can be divided: preliminary operations, an on-site survey and the output of utility maps.
Approval date: 2000-05-12
Approval process:TAP
Status: In force
Observation:Former ITU-T L.39 renumbered as ITU-T L.257 on 2016-02-15 without further modification and without being republished.
Maintenance responsibility: ITU-T Study Group 15
Further details: Patent statement(s)
Ed. ITU-T Recommendation Status Summary Table of Contents Download
1 L.257/L.39 (05/2000) In force