Loading...
HomeMy WebLinkAboutKSM Subsurface Investigation 6-12-15KELLER, 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 June 12, 2015 Dan Snyder 8847 Haven Circle Brewerton, N.Y. 13028 Re: 515 Nettles Boulevard Jensen Beach, Florida KSM Project #: 151203-b Dear Mr. Snyder: As requested, KSM Engineering & Testing has performed a subsurface investigation at the above referenced site. 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 site was fairly flat with an old concrete slab and paver brick. B. Project Description: A single-family residence (1,156 s.f.) that is wood -framed and supported on stem -wall footings is planned for the site. Although our office was not provided with detailed structural loads, for our geotechnical analysis, we have assumed the maximum wall loading conditions will be about 2,000 pounds per linear foot along the wall foundation. We estimate that very little site fill will be required to reach the desired grades. I RLE Ronald G. Keller, P.E.: 37293 / SI Lic. No.: 860 / Julie E. Keller, P.E.: 68366 TIP V %, Aff "Nolva 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 515 Nettles Boulevard -2- June 12, 2015 Jensen Beach 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 report to document our findings. D. Site Investigation: The site investigation program consisted of performing three (3) Standard Penetration Test borings in the proposed construction area. The borings were terminated at 14 to 40 feet below existing grade. The locations of the borings are shown 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. FILE COP, Ronald G. Keller, P.E.: 37293 / SI Lic. No.: 860 / Julie E. Keller, P.E.: 68366 TAP 110� IL AV, 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 515 Nettles Boulevard Jensen Beach -3- E. Engineering Evaluation and Conclusions: June 12, 2015 Based .on the information obtained from this site investigation we are pleased to offer the following evaluation: The boring logs indicate there is a soft layer of sandy clay/silt with organics located on the site. The soft layer was encountered between a depth of 5 feet to 10 feet below existing grade. This unsuitable layer is approximately 4 to 5 feet thick. The soils above and below the soft layer generally consist of fine-grained sand, that is medium - dense. In order for a shallow foundation to perform satisfactorily, it must be able to support the structural loads with an acceptable factor of safety against excessive settlements; both total and differential. Due to the settlement potential of the soft soil layer found on the site, we do not recommend supporting the proposed residence on conventional shallow footings. The anticipated settlement, in our opinion, would be too excessive and beyond the general accepted safe limits for the structure. In order to avoid any damaging structural distress due to settlements, and based on past experience of other projects that had similar underlying subsurface conditions, we recommend the installation of a concrete pile supported foundation system. The concrete piles will carry the structural loads below the weak soil layers. We recommend using auger cast -in -place piles. Although we have not been furnished with estimated structural loads, we assume that the following capacities will be sufficient to support the intended loading. Pile Pile . Pile Allowable Lateral Diameter Capacity Depth Uplift Load (Inches) (Kips) (Feet) (kips) (kips) 14 22 20 13 5 14 32 25 20 5 14 49 30 28 5 All Piles should be installed and inspected in accordance to the recomme d published by the Auger Cast -In -Place Pile Committee of the Deep F t Ronald G. Keller, P.E.: 37293 / SI Lic. No.: 860 / Julie E. Keller, P.E.: 68366 KELLER, SCHLEICHER & NIacWILLIAIYI ENGINEERING AND TESTING, INC. MARTIN (772) 337-7755 PO. BOX 78-1377, SEBASTIAN, FL 32978-1377 SEBASTIAN (772) 589-0712 PALM ( H BEAC561) 845-7445 FAX BE CH www.ksmengineering.net MELBOURNE (321) 768-8488 C.A.: 5693 E-Mail: KSM@KSMENGINEERING.NET ST. LUCIE (772) 229-9093 FAX (772) 589-6469 515 Nettles Boulevard -4- June 12, 2015 Jensen Beach F. Typical Site Preparation: The proposed building area, plus a minimum margin of five feet beyond the proposed building limits shall be stripped and grubbed of surface debris, including vegetation, roots and old concrete slabs and paver brick areas. Sufficient passes should be made during compaction operations to produce a density no less than 95 percent of its modified dry Proctor value to a depth of two feet. Any 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 in thickness and compact each lift to at least 95 percent of its modified dry Proctor value. We recommend field density tests and on -site inspection be performed at appropriate times during the earth work operations in order to verify that the site preparations have been properly constructed. G. Driveway & Walkways: Drives and walkways can be soil supported provided that our recommendations for Site Preparations are followed. Ronald G. Keller, P.E.: 37293 / SI Lic. No.: 860 / Julie E. Keller, P.E.: 68366 2 AV AV 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 515 Nettles Boulevard -5- June 12, 2015 Jensen Beach H. 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. 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. We,�Ret�'�¢�o be of assistance to you on this phase of your project. When we may bp`a ft6eto you or should you have any questions, please feel free to call. p-e�[Tlry''t�` . I er IP JEK:km E-mail to: dan@snydersnyder.net F��Ecoey Ronald G. Keller, P.E.: 37293 / SI Lic. No.: 860 / Julie E. Keller, P.E.: 68366 KSM Engineering & Testing 8-1377 BORING NUMBER B-1 KSM S basso n7 FL 32978 PAGE 2 OF 2 Tel: (772)-589-0712 Fax: (772)-589-6469 CLIENT Dan Snyder PROJECT NAME _Snyder Residence PROJECT NUMBER 151203-b PROJECT LOCATION 515 Nettles Boulevard, Jensen Beach, Florida w o Z A SPT N VALUE A v of >- _ u) w w 20 40 60 80 a- a� Wm w� 0z-j F-� F- � PL MC LL o Q O MATERIAL DESCRIPTION —f � � Ci Q w w z Q ;�—� IL z OV - m O Z v 20 40 60 80 < W " a o FINES CONTENT (%) ❑ 35 20 40 60 80 &: Gray Sand with Traces of Shell (continued) SS 8-10-10 (20) :.......:.......:...... . ..................................... 40 SS 9-10-12 Bottom of borehole at 40.0 feet. 22 a O m 0 0 N W Uj W N U Y_ U O ❑ co w J U- 2 N Y V F- n W ❑ V F- O U m Q J co D U) F J a x m x U w F O w c� ` KSM Engineering & Testing BORING NUMBER B-2 � P.O. Box 78-13 KS]� lVl Sebastian, FL 32978 PAGE 1 OF 1 Tel: (772)-589-0712 Fax: (772)-589-6469 CLIENT Dan Snyder PROJECT NAME Snyder Residence PROJECT NUMBER 151203-b PROJECT LOCATION 515 Nettles Boulevard, Jensen Beach, Florida DATE STARTED 6/11/15 COMPLETED 6/11/15 GROUND ELEVATION HOLE SIZE inches DRILLING CONTRACTOR GROUND WATER LEVELS: DRILLING METHOD Split Spoon Sample -VAT TIME OF DRILLING 3.00 ft LOGGED BY DH/MS CHECKED BY JEK AT END OF DRILLING -- NOTES S.W. Section of Proposed Building AFTER DRILLING -- W o Z ASPTNVALUE A v M: 0 � 1- W r W uj � 1-5 W o_ � � 20 40 60 80 PL MC LL W Q O MATERIAL DESCRIPTION j a O Q w y z Q D ;� � p '' C7 �z O � U m O > Uz Y " U " } 20 40 60 80 ❑ FINES CONTENT (%) ❑ < W a0 0 0 20 40 60 80 Light Brown Sand with Roots Gray Sand with Shell Fragments 5-6-6 Q SS 8-12-11 :o.: (23) ........ ...... :....... :....... :....... 5 �' SS 5-4-3 ...................................... Gray Sandy Clay/Silt with Organics (Muck) :.:.O, :.. .'. SS 2-1-2 ;..... (3) ...... :....... :....... :....... :....... 10 SS 2-3-4 :............... :....... a ::.;: Gray Sand with Shell Fragments (7) ...... ....... SS 6-8-7 :.......:............... :....... LU SS 7-8-8 Bottom of borehole at 14.0 feet. 16 cn Y_ co U O t2 rn w J Cn y J v F- n CD CD O V F ❑ U' m 3 U) to to Z C 0PFILE co 0 J a x m x U W H w OO ' KSM Engineering & Testing BORING NUMBER B-3 8-1377 KSM S basso n7 FL 32978 PAGE 1 OF 1 Tel: (772)-589-0712 Fax: (772)-589-6469 CLIENT Dan Snyder PROJECT NAME Snyder Residence PROJECT NUMBER 151203-b PROJECT LOCATION 515 Nettles Boulevard, Jensen Beach, Florida DATE STARTED 6/11/15 COMPLETED 6/11/15 GROUND ELEVATION HOLE SIZE inches DRILLING CONTRACTOR GROUND WATER LEVELS: DRILLING METHOD Split Spoon Sample AT TIME OF DRILLING 3.16 ft LOGGED BY DH/MS CHECKED BY JEK AT END OF DRILLING — NOTES _ N.E. Section of Proposed Building AFTER DRILLING -- w 11� z SPT N VALUE A U >� � } cr w w D- 20 40 60 80 PL MC LL �-, w =0 Q O MATERIAL DESCRIPTION ~w Xo j CY ��� O Q 1-- 2 z 0 o! J o- 5 0— m O > 20 40 60 80 (7 < z W U z 0 Q ❑ FINES CONTENT (%) ❑ 0 20 40 60 80 Light Brown Sand with Roots • °. • Gray Sand with Traces of Shell Fragments 6-6-7 ....................................... : :. SS :..'Q'. v 0;•::••:• ..... .:.......:....... :....... ....... SS 7-8-10 (18) :......:.......:....... 5 SS 5-4-3 ...................................... :....... :....... :.... Gray Sandy Clay/Silt with Organics (Muck) (7) ....... :::: . SS 3-2-1 • (3) :.......:.......:.......:....... -:: 10 SS 3-3-3 ..................................... b:.:.:: Gray Sand with Traces of Shell Fragments m :• ...................................... Ss 6-7-8 (15) ....... :....... :....... :....... :....... :-.. b�•'©•�� � SS 7-7-8 Bottom of borehole at 14.0 feet. 15 U) Y_ U U O rn w J tL y Y V F- n ao W O c N H O U ro g 0 r- z C7 v� FILE C in U W F W ed ohd no search of the public records 31set forth by the Minimum Technical d to the amount paid for said Survey. and have been verified by field of Way line of Common Use. I of the building setback areas as O� Iction of lines, point of 0 State, Public, and/or r�• 'ti0 a, 5 c f 1986 •�aco�� V �c spa 10 \10 �CA Finished Roor Elevation 6.6 'i !pL Pa •"' ,I Lot 540 S70"30'00"iY 32.10' _ tt 0• FlR10.2' \ 5' — ildiny Setback Line cn Cn m 0.27 S m E51 r•2 o a m 5 4.2' -A A C ,Pover)- Brick SIRC y0 i ? 0 Concrete \ WM c� ? \� 9 Lot 575 ; 1 \- B'1 ® I to �1 :B-2 i1 �c !� o O'1J•r, 9— — — -- — J-. pri1i1- erl.J 1 C ' `� 10' - Building Setback Line (n Trash 0°' RBdius-34 00' ® 1V70'30'00'E 30.60' OH Delta=90"00'00" 6 �n Length=53.41' 10 Edge of Pavement y!a O io I Center Line N70'30.00 E 488.00• _ _ — _ — Common. Use of Pavement LOCATION OF TESTS PROJECT. 515 Nettles Boulevard, Jensen Beach, Florida OF 1 CP, t ENGINEERING DRAWN BY: J.l_. PERMIT PERMIT #: DESIGNED BYsJ.K PROJECT #t 151203-b � jr� AND TESTING SCALE: ONONE22