Sheet pile retaining wall system
A sheet pile retaining wall system employing corrugated sheet piles not requiring temporary shoring to be used when widening and/or stabilization of existing highway embankment. The wall system provides a front face wall having a plurality of resistance fins perpendicularly extending therefrom via three-way connectors. The fin sheet piles first include a brace fin sheet for reducing stresses in the front face wall, then a series of additional resistance fin sheets terminating at an elevation below the face wall for accommodating a pipe drainage/utility cradle. Between the slope of the existing embankment, a temporary excavation bench, an excavation backslope, and the higher front face wall is reinforced concrete backfill for pre-stressing the wall system when fluid—and, when set, optionally engaging supplementary structural features within the set concrete backfill such as dowels/tie down anchors.
1. A sheet pile embankment retaining and/or stabilizing system, comprising:
a face wall defining a front face of the embankment having an existing gradient;
the face wall including a plurality of face wall sheet piles, wherein each face wall sheet pile terminates at a cantilever elevation located above the gradient;
two or more spaced apart brace fin sheet piles, each brace fin sheet pile perpendicularly connected to the face wall, each brace fin sheet pile terminating at a brace elevation located between the cantilever elevation of the face wall and the gradient;
a plurality of resistance fin sheet piles connected to each brace fin sheet pile so as to define a linear relationship relative to each other, each plurality of resistance fin sheet piles terminating at a cradle elevation located below the cantilever elevation;
an excavation bench defined in part by a removed portion of the embankment between adjacent pluralities of the resistance fin sheet piles to at least eighteen inches below the cradle elevation but for less than half a vertical length of each resistance fin sheet pile and for a portion of a horizontal length of said adjacent pluralities of the resistance fin sheet piles;
a reinforced concrete backfill disposed in a backfill space defined by the gradient, the excavation bench, the face wall, and adjacent pluralities of the resistance fin sheet piles; and
a plurality of dowels/tie down anchors operatively associated with the reinforced concrete.
2. The sheet pile embankment retaining and/or stabilizing system of claim 1 , further comprising:
a drainage/utility cradle seated on the reinforced concrete backfill.
3. The sheet pile embankment retaining and/or stabilizing system of claim 1 , further comprising:
a three-way connector interconnecting each adjacent face wall sheet piles and each brace fin sheet pile.
4. The sheet pile embankment retaining and/or stabilizing system of claim 1 , wherein all sheet piles are generally corrugated.
5. The sheet pile embankment retaining and/or stabilizing system of claim 1 , further comprising an excavation backslope that further defines each backfill space.
6. The sheet pile embankment retaining and/or stabilizing system of claim 1 , further comprising a step notch formed in the gradient so as to further define said backfill space.
7. A sheet pile embankment retaining and/or stabilizing system, comprising:
a face wall defining a front face of the embankment having an existing gradient;
the face wall including a plurality of face wall sheet piles, wherein each face wall sheet pile terminates at a cantilever elevation located above the gradient;
two or more spaced apart brace fin sheet piles, each brace fin sheet pile perpendicularly connected to the face wall, each brace fin sheet pile terminating at a brace elevation located between the cantilever elevation of the face wall and the gradient;
a plurality of resistance fin sheet piles connected to each brace fin sheet pile so as to define a linear relationship relative to each other, each plurality of resistance fin sheet piles terminating at a cradle elevation located below the cantilever elevation;
an excavation bench defined in part by a removed portion of the embankment between adjacent pluralities of the resistance fin sheet piles and between eighteen and twenty-four inches below the cradle elevation for a horizontal length of said adjacent pluralities of the resistance fin sheet piles;
a step notch formed in the gradient;
a reinforced concrete backfill disposed in a backfill space defined by the gradient, the excavation bench, an excavation backslope, the face wall, the step notch, and adjacent pluralities of the resistance fin sheet piles;
a plurality of dowels/tie down anchors operatively associated with the reinforced concrete;
a drainage/utility cradle seated on the reinforced concrete backfill;
a three-way connector interconnecting each adjacent face wall sheet piles and each brace fin sheet pile; and
wherein all sheet piles are generally corrugated.