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A . M . ENGINEERING AND TESTING , INC . <br /> Geotechnical Exploration for Proposed Restrooms and Boardwalk <br /> Wabasso Beach Park, Indian River County, Florida <br /> Project No . PSL1935B- 1 <br /> We recommend that the project specifications for the piles follow the relevant sections of "The <br /> Augered Caston-Place Pile Model Specification" published by the Deep Foundations Institute . A <br /> summary of important installation criteria is presented in Attachment B . An experienced <br /> inspector should monitor the installation of the piles so that these criteria are followed . <br /> Site Preparation Recommendations - Pile Supported Structure <br /> The building pads should be compacted in accordance with the general site preparation <br /> procedures in Attachment A, except that only the upper foot of soil needs to be compacted to at <br /> least 95 percent of the modified Proctor maximum dry density (ASTM D1557) . The fill for the <br /> foundation pads should comply with the indications in Section IV of Attachment A. <br /> i.. <br /> FOUNDATION RECOMMENDATIONS (BOARDWALK) <br /> The boardwalk will be supported on 6 inch square timber piles. Entrance ramps to the boardwalk <br /> will be supported on shallow footings . Recommendations for soil parameters for timber pile <br /> design are presented in Table 1 . Final pile design will be by a Specialty Engineer. To achieve a <br /> required embedment depth, jetting or predrilling may be required due to dense sand . The pile <br /> must be driven to the required capacity after predrilling or jetting to the required depth. <br /> TABLE 1 : TIMBER PILE DESIGN PARAMETERS <br /> Modulus of Lateral <br /> Subgrade Reaction <br /> Soil Soil Soil Active Passive k ci <br /> Unit Unit Weight Friction Earth Earth Above the Below the <br /> Depth Weight (submerged) Angle Pressure Pressure Water Water <br /> (feet) * (pct) (pef) (0) (Ka) (IQ Table Table <br /> 0 - 2 110 57 . 6 30 0 .333 3 . 00 90 60 <br /> 2 - 12 105 42 . 6 29 0 . 347 2 . 88 25 20 <br /> 12 — 13 '/Z 110 47 . 6 31 0 .320 3 . 12 90 60 <br /> 13 %2 — 15 115 52 . 6 34 0 .283 3 . 54 90 60 <br /> 18 %2 — 20 125 6206 40 0 .217 4. 60 225 125 <br /> 23V2 — 25 125 62 . 6 41 0 .208 4. 81 225 125 <br /> 28 %2 — 30 125 62 . 6 39 0 .228 4 . 40 225 125 <br /> 33 !/2, — 35 120 57 . 6 37 0 .249 4 . 02 225 125 <br /> 38V2 - 40 110 47 . 6 31 0 . 320 3 . 12 90 60 <br /> *Below top of boring elevation, approximately + 16 feet NGVD . <br /> k <br /> 3 <br /> 4 <br />