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HomeMy WebLinkAboutSubsurface InvestigationWr OIL d VIL KELLER, SCHLEICHER & MacWILLIAM ENGINEERING AND TESTING, INC. MARTIN (772) 337-7755 P.O. BOX 78-1377, SEBASTIAN, FL 32978-1377 SEBASTIAN (772) 589-0712 PALM BEACH (561) 845-7445 www.ksmengineering.net MELBOURNE (321) 768-8488 FAX (561) 845-8876 E-Mail: KSM@KSMENGINEERING.NET ST. LUCIE (772) 229-9093 C.A.: 5693 FAX (772) 589-6469 December 11, 2018 Jim Wright P.O. Box 420495 Summerland Key, FL 33042 Re: 6400 Koblegard Road Fort Pierce, Florida KSM Project #: 184193-b Dear Mr. Wright: As requested, KSM Engineering & Testing has performed a subsurface investigation at the referenced site. Presentation of the data gathered during the investigation, together with our geotechnical related opinions, are included in this report. A. Site Description: At the time of drilling, the proposed construction area was fairly flat with light surface vegetation (grass). B. Project Description: A single-family residence is planned to be constructed on the site. Loads from the structure will be transferred to the ground by conventional shallow footings. We estimate the maximum loads will be less than 2,500 pounds per linear foot along the wall foundation. Some site fill may be required to reach the desired grades. C. The scope of our study consisted of the following: 1. Performed Standard Penetration Test Borings in the proposed construction area to estimate the subsoil relative density. 2. Measured the groundwater level at each boring. 3. Evaluated the existing soil conditions with respect to the proposed construction and provided recommendations for site preparation and foundation design. 4. Prepared this reportto document our findings. :: F�.b ^ Ronald G. Keller, P.E.: 37293 / SI Lic. No.: 860 / Julie E. Keller, P.E.: 68366 F KELLER, SCHLEICHER & MaCWILLIAM ENGINEERING AND TESTING, INC. MARTIN (772) 337-7755 P.O. BOX 78-1377 SEBASTIAN, FL 32978-1377 SEBASTIAN (772) 589-0712 PALM BEACH (561) 845-7445 www.ksmengineering.net MELBOURNE (321) 768-8488 FAX (561) 845-8876 E-Mail: KSM@KSMENGINEERING.NET ST. LUCIE (772) 229-9093 C.A.: 5693 FAX (772) 589-6469 6400 Koblegard Road -2- December 11, 2018 Fort Pierce, Florida D. Site Investigation: The site investigation program consisted of performing four (4) Standard Penetration Test borings (SPT), in the proposed construction area. The SPT borings were terminated at depths of 10 to 14 feet below grade. The locations of the borings are indicated on the attached boring logs. The SPT borings were completed in accordance with procedures described in ASTM D- 1586. A standard 1.5 inch I.D., 2 inch O.D. split -spoon sampler is driven into the soil by successive blows of a 140 pound hammer freely falling 30 inches. The number of blows required to drive the sampler 1 foot, after seating 6 in., is designated the Penetration Resistance, or "N" value. At regular intervals the sampler is extracted from the ground and opened to allow visual examination and classification of the retained soil sample. Also, the groundwater table was allowed to stabilize and the depth of the groundwater elevation recorded from existing grade. The records of the soils encountered, the penetration resistances and groundwater level are shown on the attached logs. E. Engineering Evaluation and Conclusions: Based on the information obtained from this site investigation, we are pleased to offer the following evaluation: The boring logs indicate the subsurface conditions soils consist mostly of fine-grained sand and fine-grained clayed sand. Shell fragments were also found in the borings. "N" values recorded during the boring operation indicate the soil density is generally medium dense. Please refer to the soil boring logs for specific information relative to the soil description. Based on the existing soil conditions, the proposed structure can be supported on a shallow foundation system provided that the site is properly prepared. The following sections provide recommendations for the site preparation and foundation design. Ronald G. Keller, P.E.: 37293 / SI Lie. No.: 860 / Julie E. Keller, P.E.: 68366 KELLER, SCHLEICHER & MaCWILLIAM ENGINEERING AND TESTING, INC. MARTIN (772) 337-7755 P.O. BOX 78-1377 SEBASTIAN FL 32978-1377 SEBASTIAN (772) 589-0712 PALM BEACH (561) 845-7445 www.ksmengineering.net MELBOURNE (321) 768-8488 FAX (561) 845-8876 E-Mail: KSM@KSMENGINEERING.NET ST. LUCIE (772) 229-9093 C.A.: 5693 FAX (772) 589-6469 6400 Koblegard Road -3- December 11, 2018 Fort Pierce, Florida F. Typical Site Preparation: The proposed building area and areas to be paved, plus a minimum margin of five feet beyond the proposed construction shall be stripped and grubbed of surface debris, including vegetation, roots and organic matter. The building area should be graded level and proofrolled. Any soft yielding areas shall be excavated and replaced with clean compacted fill. Sufficient passes should be made during compaction operations to produce a density no less than 95 percent of its modified dry Proctor value (ASTM D 1557) to a depth of two feet. After the exposed surface has been proofrolled, the building and pavement areas may be filled to the desired grades. The fill material shall consist of clean granular sand containing less than 10% material passing the U.S. Standard No. 200 mesh sieve. Place structural fill in loose layers of 12 inches or less in thickness and compact each lift to at least 95 percent of its modified dry Proctor value. After excavating for the footings, the disturbed footing subgrade should be recompacted to 95 percent (minimum) of its modified dry Proctor value. This can be best achieved by making several passes with a relatively light -weight walk -behind vibratory sled or roller. G. Foundation: Provided that our recommendations for site preparation are followed, the proposed residence may be supported on conventional concrete, steel reinforced footings designed for an allowable soil bearing pressure of 2,500 pounds per square foot, or less. With the foundation properly designed and the site properly prepared, we anticipate total settlements less than % of an inch and differential settlement of less than '/a of an inch. The majority of the settlement should occur during construction. Ronald G. Keller, P.E.: 37293 / SI Lic. No.: 860 / Julie E. Keller, P.E.: 68366 ll, s "QAVJL KELLER, SCHLEICHER & MacWILLIAIVI ENGINEERING AND TESTING, INC. MARTIN (772) 337-7755 P.O. BOX 78-1377, SEBASTIAN, FL 32978-1377 SEBASTIAN (772) 589-0712 PALM BEACH (561) 845-7445 www.ksmengineering.net MELBOURNE (321) 768-8488 FAX (561) 845-8876 E-Mail: KSM@KSMENGINEERING.NET ST. LUCIE (772) 229-9093 C.A.: 5693 FAX (772) 589-6469 6400 Koblegard Road -4- December 11, 2018 Fort Pierce, Florida H. Floor Slabs: A conventional slab -on -grade can be used in the "at grade" portion of the residence. We recommend the disturbed subgrade below the floor slab be re -compacted to 95 percent of the modified Proctor maximum dry density (ASTM D 1557) prior to placement of the concrete. An estimated modulus of subgrade reaction of 150 pounds per cubic inch (pci) can be used for design of the slab -on -grade. We recommend that expansion or control joints be incorporated in the slab at frequent intervals to control shrinkage cracks. A moisture barrier is recommended beneath the floor slab to prevent moisture migration from the underlying soil resulting in dampness of the slab. I. Closure: This report has been prepared in accordance with generally accepted soil and foundation engineering practices based on the results of the test borings and the assumed loading conditions. No warranties, either expressed or implied, are intended or made. This report does not reflect any variations which may occur between the borings. If variations appear evident during the course of construction, it would be necessary to re-evaluate the recommendations of this project. Environmental conditions, wetland delineation, water quality, and municipal requirements are not a part of this report. We are pleased to be of assistance to you on this phase of your project. When we may be of further service to you or should you have any questions, please feel free to contacl thq,office. n ;frrfill E-mail to: jimwrightthr@gmail.com Ronald G. Keller, P.E.: 37293 / SI Lic. No.: 860 / Julie E. Keller, P.E.: 68366 KSM Engineering & Testing BORING NUMBER B_1 P.O. Box 78-1377 Sebastian, FL 32978 PAGE 1 OF 1 KSM Tel: (772)-589-0712 Fax: (772)-589-6469 CLIENT Jim Wright PROJECT NAME 6400 Koblegard Road PROJECT NUMBER 184193-b PROJECT LOCATION Fort Pierce, Florida DATE STARTED 12/5/18 COMPLETED 12/5118 GROUND ELEVATION HOLE SIZE inches DRILLING CONTRACTOR GROUND WATER LEVELS: DRILLING METHOD Split Spoon Sample �ZAT TIME OF DRILLING 5.83 ft LOGGED BY DP/CH CHECKED BY JEK AT END OF DRILLING --- NOTES See Attached Location Plan AFTER DRILLING -- w ® SPT N VALUE U U) W 20 40 60 80 PL MC LL �—� M� EL � =c9 o- O MATERIAL DESCRIPTION Wm � � wo > 0 0z� Z)¢ W .4 ~� z CL D" WW �� o � O� v m0> Y`" 20 40 60 80 ❑ FINES CONTENT (%) ❑ O < z W V? 0 0 Brown Sand with Roots Gray Sand SS 8-7-9 ;..•.. :.. :.. Light Brown Sand SS 7-7-8 :.: (15) 5 :.. .......................... ............ :: V Grayish Brown Clayed Sand 6-5-6 - SS •; :.. ......... ............................ :....... :....... :....... SS(8) 5-4-4 ....... 10 n(8) :.'.: ` :....... :....... :....... :....... SS 4-3-5 n :. SS 4-5-4 ( 9) .... .... .... .... Gray Sand with Traces of Some Shell SS 4-6-6 u o:: :....... :....... ....... :....... 12 ( ) Bottom of borehole at 14.0 feet. KSM Engineering & Testing BORING NUMBER B02 �j� 7i14�1 P.O. Box 78-1377 PAGE 1 OF 1 11 Sebastian, FL 32978 Tel: (772)-589-0712 Fax: (772)-589-6469 CLIENT Jim Wright PROJECT NAME 6400 Koblegard Road PROJECT NUMBER 184193-b PROJECT LOCATION Fort Pierce, Florida DATE STARTED 12/5/18 COMPLETED 12/5/18 GROUND ELEVATION HOLE SIZE inches DRILLING CONTRACTOR GROUND WATER LEVELS: DRILLING METHOD Split Spoon Sample Q AT TIME OF DRILLING 5.83 ft LOGGED BY DP/CH CHECKED BY JEK AT END OF DRILLING --- NOTES See Attached Location Plan AFTER DRILLING -- ® SPT N VALUE S U >- iy ~m >- _ it w �z� w ~� 20 40 60 80 PL MC LL wv =C7 a 0 �� MATERIAL DESCRIPTION g o > W O- ¢ Fa-� W 2 Ye z Q D� 20 40 60 80 Q Z w MO> U z UO ❑ FINES CONTENT (%) ❑ rr a. a 0 20 40 60 80 Brown Sand with Some Roots :` •, Gray Sand SS 10-7-8 Light Brown Sand SS 9-8-9 Grayish Brown Clayed Sand 5 SL 7-5-4 SS (9) 5-4 4 SS :....... :....... :....... :....... (8) IL 5-7-5 SS 10 :. (12) Bottom of borehole at 10.0 feet. m Lu w W w i Y_ 0 U O O Li W J LL Y W W W 2 U) Y V w N N H c� m g 0 R U) z Z F- 0 J a 2 m U W H O w ._ 0 KSM Engineering & Testing j�� ]plV� P.O. Box 78-1377 K1 Sebastian, FL 32978 Tel: (772)-589-0712 Fax: (772)-589-6469 BORING NUMBER B-3 PAGE 1 OF 1 CLIENT Jim Wright PROJECT NAME 6400 Koblegard Road PROJECT NUMBER 184193-b PROJECT LOCATION Fort Pierce, Florida DATE STARTED 12/5/18 COMPLETED 12/5/18 GROUND ELEVATION HOLE SIZE inches DRILLING CONTRACTOR GROUND WATER LEVELS: DRILLING METHOD Split Spoon Sample �-Z AT TIME OF DRILLING 6.00 ft LOGGED BY DP/CH CHECKED BY JEK AT END OF DRILLING -- NOTES See Attached Location Plan AFTER DRILLING W o ® SPT N VALUE A 0 M >- U W w 20 40 60 80 PL a C LL I ~ w CL 00 MATERIAL DESCRIPTION uj(n w C O Z¢ w z a o-5 0- m0> Y" 20 40 60 80 O z U z 0a. W < W El FINES CONTENT (%) ❑ v�•.: ofwvn .�anu vvnn nww o:'• 6-9-9 ' SS (18) :.......:.......:.......:....... Gray Sand : :. Light Brown Sand 8-7-6 SS 5 ::. Grayish Brown Clayed Sand 5-5-7 SS (12) :.. :. :... .:...... SS 6-7-6 .•: (13) SS 5-5-5 '�' '� � • ...................................... n 10 (10) n 7 n Bottom of borehole at 10.0 feet. KSM Engineering & Testing BORING NUMBER B_4 �j ]� P.O. Box 78-1377 11 19�� Sebastian, FL 32978 PAGE 1 OF 1 Tel: (772)-589-0712 Fax: (772)-589-6469 CLIENT Jim Wright PROJECT NAME 6400 Koblegard Road PROJECT NUMBER 184193-b PROJECT LOCATION Fort Pierce, Florida DATE STARTED 12/5/18 COMPLETED 12/5118 GROUND ELEVATION HOLE SIZE inches DRILLING CONTRACTOR GROUND WATER LEVELS: DRILLING METHOD Split Spoon Sample �ZAT TIME OF DRILLING 6.08 ft LOGGED BY DP/CH CHECKED BY JEK AT END OF DRILLING — NOTES See Attached Location Plan AFTER DRILLING — Lu e► SPT N VALUE O U >- W >- U) W w 20 40 60 80 =~ n =O a MATERIAL DESCRIPTION ~ m w 0 C% �z� �� � � z PL MC LL ' w 0 g > o z Q w r n �- o (9 o z O m O> z U} 20 40 60 80 < 0 ofU El FINES CONTENT (%) ❑ of d Q 0 1 20 40 60 80 •.:.;: Brown Sand with Traces of Roots Gray Sand 8-6-6 SS Light Brown Sand 9-7-8 5 Grayish Brown Clayed Sand 6-7-5 SS :: :•. .... SS 6-5-5 ...................................... : ..: (10) 10 SS 4-4-5 co(9) TO ::•.::. SS 5-6-4 :.. W o;:::.;: Gray Sand with Traces of Some Shell Fragments 10 ( ) X SS 4-4-4 .... :....... :....... :....... :...... Q? (8) Y Bottom of borehole at 14.0 feet. U) U O W ui w J_ W G7 Y tr W Lu W U) Y v O m N N H q m g 0 U) z 0 0 J a x m x U W F- O w cD Nonni 'max x x PROP05 0 C N 4' f PROPOSED DRIVE—THRU CARPORT I EXIST. CONC. x PROP. CONC. j APRM ENTRY EL.. 23�25' NAVD'88 j + 71.E PROPOSED AC PAD EL. 22.83' NAVD'881 OUST.I CBS 2 I �NALL PROPOSED RESIDENCE I 20. r -t 2..? �;' rya oa F.F.EL. 23.33 titi� + 2I1 7 VD 88 + 19I� I PROPOSED B-3 N I I EXIST. COVERED0111 CONC. PATIO I ao B-4 I I EXISTIN TWO—STORY .24' 30' PROPOSE© f I C.B.S. GARAGES .F.EL 22.61 OVERE NAVD'88 PATIO EL: 23.25' I I X'Ib� x'Z?I.P IC" NAVpijlp f +21.8 RECONSTRUCT TOP OF BANK LOCATION OF TESTS REC jNSTRUgT TOP -OF 80K rn X PROJECT: 6400 Koblegard Road, Fort Pierce, Florida SHEET OF 1IV Com IL N ENGINEERING DRAWN BY: J.L. PERMIT #: PROJECT #: 184193-b 1_J AVL AND TESTING DESIGNED BY: J.K. 12 ,�„ SCALE: NONE