초록 ▼

A trench box panel with an especially lightweight foamed filler located between the inner and outer panel surfaces in a trench box panel and between structural, vertical and horizontal elements in prevention of the intrusion of water, mud and grime. The impermeable panels thus produced are more conv

A trench box panel with an especially lightweight foamed filler located between the inner and outer panel surfaces in a trench box panel and between structural, vertical and horizontal elements in prevention of the intrusion of water, mud and grime. The impermeable panels thus produced are more convenient to use, require less inspection in production against leakage and do not become so heavy as to be almost impossible to move and maneuver during usage. The procedures of filling the panels with lightweight unfilled foam is by use of blocks, foaming in situ, and fill foaming.

대표청구항 ▼

A trench box having water impermeable panels and each of said panels comprising: a perimeter frame; a plurality of vertical and horizontal internal support structural elements; a pair of metal skin surfaces having plural connectors transversely extending from one side of said skin surfaces and secur

A trench box having water impermeable panels and each of said panels comprising: a perimeter frame; a plurality of vertical and horizontal internal support structural elements; a pair of metal skin surfaces having plural connectors transversely extending from one side of said skin surfaces and secured to said skin surfaces and to selected of said structural elements, said skin surfaces registering on said frame and closing against and secured to said vertical and horizontal support structural elements; a lightweight water impermeable closed cell foam filler in the cavities between said frame, said vertical and horizontal elements and said skins; and means separating pairs of said panels in spaced apart relation, said means attached to said connectors at the ends thereof.