Inserted foundation (slant-insert flexible foundation) gen.

[Jive talking]

According to the geological report, foundation of tangent tower and small-angle angle tower in areas with geological conditions of silty soil, silty clay and no groundwater will be inserted foundation.

[Jive talking]

еще немного контекста:
Meeting areas where it is impossible to adopt rock embedded foundation and excavated foundation, generally slant-insert flexible foundation will be the first choice, so as to reduce consumption of concrete material.

и как можно по точнее перевести excavated foundation, please?

[Лу Рид]

зачастую предпочтение отдается устройству гибкого фундамента, который сооружается предварительной загрузкой (insert) с изгибами формы (slant)
http://www.npp-geotek.ru/static/books/soil_mechanics_foundations/F_12.php

[Jive talking]

спасибо за совет.