Soil Mechanics

soil mechanics
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  $UB$URFACE SOIL INVESTIGATION REPORT FOR THE PROPOSED TT,I'ENTY FOUR (24} STORY EUROTEL BUILDING EOR. R.MAGSAYSAY AVE. AND C.M. RECTO ST., DAVAO CITY iI SUBMITTED TO:ENGR. CRIS U. LASANGENPROJECT ENGINEEREURO TOWERS INTERNATIONAL. INC. EDSA COR. AURORA BLVD., CUBNOQUEZON CITY FROM THE OFFICE OF: .,..1*' : -r ;'- . I :'r r . -i -, tu ^*e-l ;.* i h il#;:iur- _; '#ffiersyffi$y s#e.&Ey$#e{s e 3#tr#ffi#L##*#s* $ffi#. 't{+i 'r ;; s' # soll lllvEITlcArto}a FouxDATtOta DErtc}t & gt AtuATtox nArEnnL rErrlltc aL *r[tG ' BESTDI &rAA 8R',DG[, D,ve$roN ROAD, DAVAO (lTy, TlLfaAX {o8r} t41-te 4, {0ss} 941-1886: EMAIL :r:aaiir,{Q*;ii,;:4  Soil lnvestigation Report for the Praposed Tweng Four {24) Story Eurotet Buitding Comer R.Magsaysay Ave., and C.M. Redo, Davao City TABLE OF CONTENTS CONTENTS I. INTRODUCTION II. PURPOSEAND:OBJECTIVES III. FIELD PROCEDURES IV. LABORATORY PROCEDURES V. EVALUATIONPROCEDURE VI. GEOLOGIC SETTING AND SEISMICITY VII. OBSERVATIONS VIII.CONCLUSpN AND RECOMMENDATIONS IX. APPENDICESVICINITY AND BOREHOLE LOCATION MAP APPROXIMATE GEOLOGIC PROFILERECORD OF SUBSURFACE SOIL EXPLORATION DRILL LOG.LABORATORY TEST RESULTSPILE CAPACITY CALCULATIONFIELD EXPLORATION PICTURES PAGE 11 I 2 3 4 56 I QiTl Oualitert rolutionr & Tcchnologier, lnc.  I Soil lnvestigation Repoft forthe Pmposed Tweng Faur (24) Story Eurotel Buildiry ComerR.Magsaysay Ave., and C.M. Recto, Davao City I. INTRODUCTION A subsurface soilinvestigation was conducted by drilling one (1)test hole scheduled to a depth of 80.0 metes from the natural ground level and was drilled within the area of the proposed project aslocated in the borehole location map (see Appendices). This report contains the discussions, evaluations and recommendations intended for the design of the structural foundation components for the proposed Twenty Four (24) Story Building located at Comer R. Magsaysay Ave., and C.M. Recto St., Davao City (see Figure 1 and 2). lt is construed that the recommendations stated herein are purely recommendatory based on universallyaccepted engineering procedure and standards in testing and evaluation. The subsurface soil investigation was conducted in order to obtain information on the subsurface conditions needed for the design of the foundation component of the proposed building, Samples obtained during the investigation were tested in the laboratory for soil classification and determining the engineering characteristics of the on-site soil and rock. The results of the field andlaboratory test are discussed and presented herein. Specifically, the soilinvestigation was conducted to meet the following objectives: 1. Characterize the geologic profile of the site: Soil classification, index and mechanicalproperties as well as location of the latent ground water table. 2. Analyze and recommend tlre soil strength in terms of bored pile capacity for deep type footing. 3. Evaluation of liquefaction potential should the site be susceptible to this phenomenon. III. FIELD PROCEDURES 1. Drilting Procedure The boreholes urere advanced using a rotary drillwith mild steel drill bit for soft to hardsedimentary formations with intermittent mud washing to remove the cuttings out of the holes. The Standard Penetration Test (SPT), designated as ASTM D 1586-67, waS conducted at every 1.0 meter depth for the first 3.0 meters and at 1.5 meters depth for the succeedingdepths. On the oher hand, carbide core bits with double tube core banel were used when rock QlTl Orntltert toludonr & Technologter, tnc. t-  I -_i' III I ItI I t I ; T I I II I sail lnvestigation Reprt for the propo*d rwenty Four (24) story Eurotel BuitdingComer R.Magsaysay Ave., and C.M. Recto, Davao City formations were encountered. Core samples were then retrieved through the drilling process. Rock Quality Designalion (ROD) was determined as well as the percent recovery of the rocksamples.Measurements on weights, dimension, and volume v,vere conducted on the retrievedsamples in the field and well kept in a sealed container for further laboratory tests.2. Field Test Procedure a. For Normal Soils: The Standard Penetration Test (SPT) consists of driving a standard split spoon sampler of,5.08cm (2') outside diameter in three sucmssive 15cm (6') intervals using a drophammer of 64 kg. (1a0 bs.) weight from a heiglrlof 76 cm.(30'). The number of blows topenekate 15 cm is recorded successively until the third interval is penetrated. The first interval blow count is considered as the seating drive and is discarded. The last two blow count from the second and third interval are added to give what is known as the N value, which is ameasure of the density or tre consistency of the underlying soil. These values were then usedon conelation procedures in determining other soil properties. The recovery length for each soilsample retrieved was measuredb. For Rocks: , Retrieved core samples were measured to determine the Rock eualig Designation(ROD)- The RQD is the ratio of tlre total length of rock parts not less than 4' to the total length of the rock retrieved including parts less than 4 . For each core run, the core length recoveredis at least 7570. IV. I.ABORATORY PROCEDURES The following laboratory tests and their brief description were canied out on ttre soil samplesobtained from the test holes: 1- MechanicalGrain Size Analysis. ASTM. D 422-63. The soilsample was passed through a series of sieves. The weight of the soil retained on each sieve was determined andrecorded. For each sample analyzed a graduation curve was drawn based on the percent QIil Ou.E crr lotutbru & IcctaCogte+ lm. t
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