The phrase "a more solid base" is correct and usable in written English.
It can be used when discussing the foundation or underlying support for an idea, project, or structure, indicating an improvement in stability or reliability.
Example: "To ensure the success of our project, we need to establish a more solid base for our research and development efforts."
Alternatives: "a stronger foundation" or "a firmer groundwork".
They needed a more solid base, more tackles and more oomph.
For one, it gives the new financial aid a more solid base of support among alumni.
"But they have a more solid base than organized labor elsewhere because California has a greater immigrant and Latino population".
The smart four- and five-star sites offer different styles of accommodation: chalets, treehouses, gypsy caravans – or apartments, for those who prefer to enjoy the great outdoors from a more solid base – in a choice of seaside, mountains and the countryside settings.
While this does then become a bit of a self fulfilling prophesy, it does make them a better group for still further research or more integrated projects than some other groups as we're starting from a more solid base of knowledge.
With a five-man midfield closing the many gaps that appeared in the first leg, last season's Champions League finalists had a more solid base from which to attack.
As part of full field development project, a realistic picture of the depositional history of the reservoir through geological time provides a more solid foundation to build a knowledge base for economic forecasting and maximum return of investment.
An emerging body of international law is constructing an ever more solid base for impartial trials in a world arena by a multinational panel of justices.
Binyamin Netanyahu, the Israeli prime minister and leader of the Likud party, enjoys a more solid power base at home but he, too, is subject to severe constraints on his freedom of action.
"We need a more solid knowledge base to allow for evidence-based decision making on whether we should engage or stay engaged in a partnership," said UNICEF Director of Private Fundraising and Partnerships Philip O'Brien.
In order to put the misalignment conjecture on more solid bases, we designed a bimodal perturbation experimental paradigm with a time-varying visuo-proprioceptive misalignment (VKP, VK−): it turns out that the aiming error is at its minimum value when the misalignment angle is null and the error grows in a linear way in relation with the misalignment, as shown in fig. 5.
