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US 4,073,148 AGranted
Precast element for the construction of trenched structures and the process related thereto
AssigneeAlpina S.p.A.
InventorLuigi Zaretti
Life of this patent
Estimating the term…
Abstract
Structures are installed below grade by trenched construction. Precast wall elements, having a generally rectangular-shaped wall with at least one of its faces having essentially vertically-oriented parallel ribs, are placed in mud-filled trenches. Liquid concrete is then poured between the ribs to provide a foundation and to secure the wall element to the ground.
Claims12
Precast reinforced concrete element for trench construction of structures such as retaining walls and tunnels comprising:
- a generally rectangular-shaped wall with at least one of its faces having essentially parallel ribs extending outwardly from the surface of the wall and defining separate volume areas between the base of the wall, the two adjacent ribs and a plane tangent to the outer extension of each rib, said ribs being spaced apart to permit the pouring of liquid concrete down between adjacent ribs for the foundation of said element below said element and to permit the pouring of concrete in between the ribs to provide lateral support for the wall by filling said volume areas.
A process for installing structures below-grade by trenched construction comprising:
- (a) forming guide cordons by excavating guide trenches which are then filled with concrete;
- (b) excavating main trenches of the desired depth between and below the guide cordons and filling said trenches with mud;
- (c) placing in said mud-filled main trenches precast wall elements having a generally rectangular-shaped wall with at least one of its faces having essentially vertically-oriented parallel ribs;
- and
- (d) pouring liquid concrete into the bottom of the trenches and continuing to fill the trenches including the area adjacent the ribbed wall.
2 more elements
Dependencies are inferred from the claim text.