Patent ID: 7972085
Filing Date: 2011-07-05
Classification: E02D

Abstract:
1. A method of trench shoring, comprising: inserting at least a first pair of mutually oppositely arranged shoring panels into a trench; guiding a spreading frame between the two shoring panels in a first pair of linear guides, wherein a respective linear guide of the first pair of linear guides is connected to a respective one of the shoring panels of the first pair of shoring panels; guiding at least a second pair of mutually oppositely arranged shoring panels between the first pair of shoring panels and inserting the second pair of mutually oppositely arranged shoring panels into the trench; inserting a second pair of linear guides between the first pair of linear guides; connecting a respective linear guide of the second pair of linear guides to at least one shoring panel of the second pair of shoring panels and the linear guides of the second pair of linear guides are held at a spacing by the spreading frame; removing the spreading frame from between the first pair of linear guides; and when the trench is further dug out, lowering the second pair of shoring panels and the second pair of linear guides and inserting the spreading frame between the first pair of linear guides.