In-Situ Stress

Definition - What does In-Situ Stress mean?

In-situ stress is the natural, local stress within a rock mass formation. In-situ stress defines the quantity and direction of compression that is being applied to a rock at a specific location. It is a property of rock mass studied by trenchless construction planners in order to assess potential geotechnical challenges.

Trenchlesspedia explains In-Situ Stress

It is important to understand any geological conditions surrounding a potential trenchless construction site prior to the start of any work. Rock mass properties can have a significant influence on the operation at any point.

Measurements of in-situ stress are designed to account for potential failures or other challenges that construction may face. The problem is instability. Vertical and horizontal compressive stress can result in ground failures, unsupportive jacking pits, or drill hole wander.

Testing of in-situ stress, along with other rock mass properties, can significantly add to pre-construction comprehension. Such testing will help in the design of other trenchless construction operations.

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