Retaining walls; their design and construction . le 17 the factor of safety is found to be two. As-sume that the counterforts will be spaced ten feet apart. The pressure atthe base of the vertical slab is Jgh{l + c) = X 50 X X = per square foot. From (126) H 1 100 X 50 X L_l3 12 X 16,000 The depth for shear is = 118 RETAINING WALLS It will be found, later that the thickness of the face slab at the base willbe controlled by the necessary dimensions of the member composing thevertical arm of the truss. The thickness of the base slab is controlled bythe
Retaining walls; their design and construction . le 17 the factor of safety is found to be two. As-sume that the counterforts will be spaced ten feet apart. The pressure atthe base of the vertical slab is Jgh{l + c) = X 50 X X = per square foot. From (126) H 1 100 X 50 X L_l3 12 X 16,000 The depth for shear is = 118 RETAINING WALLS It will be found, later that the thickness of the face slab at the base willbe controlled by the necessary dimensions of the member composing thevertical arm of the truss. The thickness of the base slab is controlled bythe depth necessary for the adhesion stresses. If 1 square bars, spaced6 apart are to be used, then the depth necessary to satisfy the limitingadhesion stress of 80 pounds per square inch is 5500 X 5 80 X X 8 49 To avoid the use of so heavy a slab throughout the base, a fillet of con-crete will be placed at the junction of the base and counterfort, dimensionedas shown in Fig. 58. The main body of the slab will then be taken as 2 9thick. ?J-. 4-l^,6x6x^
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Keywords: ., bookcentury1900, bookdecade1920, bookidretainingwal, bookyear1920
