The phrase "underlying foundation" is correct and commonly used in written English.
It can be used to refer to the basic or fundamental principles or beliefs on which something is based. Example: The success of any relationship relies on a strong underlying foundation of trust and communication.
The PC scenario produced significantly colder temperatures within the ACE and underlying foundation soils.
The procedures proposed take account of higher vibration modes, water compressibility and flexibility of underlying foundation of the structure.
The typical cross section of a rigid wall with a reinforced backfill and underlying foundation strata is shown in Fig. 1, in which 'b' denotes the roadway width, and 'H' denotes the wall height.
It is an organizational ethos which predicates, facilitates and complements Denver's unselfish brand of basketball play on the court, and is the underlying foundation upon which their recent success was built.
Standards exist to perpetually improve the underlying foundation of quality within the economy.
Furthermore, innovation is the underlying foundation of technological advances and today's competitive economy.
Feminist philosophers of biology are deeply concerned about the wholesale application of this model of sexual selection without empirically testing its underlying assumptions and investigating the relationship between the underlying foundations of the model and cultural assumptions regarding gender.
The presence of soft clays underlying foundations has been responsible for failures in several geotechnical and geo-environmental projects.
Solidify underlying foundations.
(An underlying plywood foundation caused the ribbon image to emerge from the drying mud).
Finished drawings sometimes were kept as prototypes for paintings and as objects of connoisseurial delectation, but generally they served as the underlying, invisible foundation for paintings.
