METHOD FOR STRUTTING AND RELIEVING STRUTS IN AN EARTH-RETAINING STRUCTURE OF AN EXCAVATION SUPPORT SYSTEM, AND A SYSTEM OF INTERCOUPLED ELEMENTS USED FOR PURPOSES OF THIS METHOD

摘要

The method for strutting and relieving struts of brace legs in an excavation support system consists in that at least one non-permanent support point is formed for the strut placed between the brace legs, whose positioning on the brace leg is controlled by means of an adjustable anchoring piece catching on another support point on the same brace leg. The force component produced by the strut's thrust, affecting the brace leg, is controlled by adjusting the anchoring piece's tensioning force. The force component is relieved by breaking the anchoring piece's continuity. In the system for strutting and relieving of struts, on the surface of each of the pair of intercoupled corner brace legs (11), supporting corner retaining walls (12) of the excavation, a retaining element (13) and, at a certain distance from it, a corner lug (15) are installed. The retaining element (13) and the corner lug (15) are coupled by means of corner anchoring pieces (16) terminated with corner working nuts (17) on both sides. Both corner lugs (15) are connected with each other with a comer strut (19). Corner induction winding (18) is coiled about the corner anchoring pieces (16). In the invention variation, on the outer surface of each of two coupled side brace legs (21), supporting side retaining walls (22), at a certain distance from each other, there are two side lugs (23). The lugs are intercoupled by means of side anchoring pieces (24) terminated with side working nuts (25) on both sides. Spreading struts (26), whose other ends are connected with the main strut (27), are attached to both side lugs (23). Side induction winding (28) is coiled about the side anchoring pieces (24).