Caminha Municipal Library
Câmara Municipal de Caminha
Nuno Brandão Costa, Arquitecto Unipessoal, Lda
1300,00 m 2
In the Project for the new Munincipal Library of Caminha, the traditional existing building with two floors (with about 10.8 x 18.0 meters) totally built in rock, will be enlarged with the construction of a basement and a new body, constructed from scratch, consisting of reinforced concrete (with approximately 14.5 x 16.5 meters), also with a basement and two elevated floors.
A main aspect of the Project is directly associated with the excavation, where the contention of the peripherical soil is of the utmost importance and difficulty, for the construction of the basement, in which the solution adopted was to construct some “jet-grouting” pillars that simultaneously assure the contention and the refitting of the existing walls; due to the existing underground running water and the grand permeability of the soil. The bottom slab of the basement will be connected to the peripherical walls, retaining water, eliminating the need of exterior drainage.
The structural solution of the new body, a direct result of the architectonical conception, consists of a reinforced concrete “box” with peripherical walls in two opposite sides (whereas the other two are glass), where the slabs are supported, without any intermediate pillars - with the particularity that in both elevated floors, this solution of façades “rotates” 90º which demands a rigorous study of the whole, with special attention to the points of singular contact nearest to the corners, where the verticality is maintained.
Most of the slabs are solid (with the exception of those of the new body, that are waffled), dimensioned to function effectively and with acceptable deformations in the great existing spans between walls (of about 12.00 meters) and in the varandas in console (that reach 4.5 meters).
The pavements of the existing house are all analogous to the new body, having the roof a structure in wood – being due to the easiness of its construction, along with the reduction in weight for the rock walls.