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Priority to ES0255545ApriorityCriticalpatent/ES255545A1/en
Publication of ES255545A1publicationCriticalpatent/ES255545A1/en
Improvements introduced in the construction of tunnels using prefabricated pieces as lost formwork and then filling the space between these parts and the rock with gravel and special concrete, according to which the base is first built in situ with concrete in mass with the help of the usual formwork; the concrete rings are spaced at the same time as the screeds, but with a small lag, constructing in the lower part of these rings a heel for supporting the secondary track that avoids any transport interference with the sill track used for all general operations; the prefabricated pieces of lost formwork are placed until the point of termination of rings; it is filled with gravel that is shoved directly into the space between prefabricated pieces and rock; the upper arch of the cladding is closed by prefabricated pieces, the space between these parts and the rock wall is filled with gravel, the key of the ring is closed by means of small pieces grouting with quick mortar and finally the mortar is injected through holes left in the prefabricated pieces, thus ensuring a perfect interlocking of all the pieces of the coating and a complete contact of this with the rock. (Machine-translation by Google Translate, not legally binding)
ES0255545A1960-02-051960-02-05Improvements introduced in the construction of tunnels (Machine-translation by Google Translate, not legally binding)
ExpiredES255545A1
(en)
Improvements in prefabricated construction elements of large dimensions for exterior walls (Machine-translation by Google Translate, not legally binding)
New system for construction of circular tanks with prefabricated blocks and steel zunch. (Machine-translation by Google Translate, not legally binding)
Excavation procedure of various sotans and construction of the walls of containment, without using anchors or codals. (Machine-translation by Google Translate, not legally binding)
Improvements in the construction of construction elements from mixed fragile molds of concrete, mortar and similar (Machine-translation by Google Translate, not legally binding)