ASBA Technical Meeting Jim Catella, P.E., CFB, CTB; Clark ... · Jim Catella, P.E., CFB, CTB; Clark Companies. Ken Schmidt, P.E., KWS Engineering & Development. ... TEST PERCOLATION

ASBA Technical MeetingNew Orleans, LADecember 3, 2017

Jim Catella, P.E., CFB, CTB; Clark CompaniesKen Schmidt, P.E., KWS Engineering & DevelopmentTodd Smith, P.E., LEED-AP, CFB; Academy Sports Turf

• WHAT’S THE GOAL OF THE REPORT?

• WHAT’S “BOILER PLATE” VS ANSWERS WE NEED?

• WHAT ARE THE QUESTIONS TO ASK?

• WHAT’S UNIQUE TO FIELD CONSTRUCTION?

• GET TO THE POINT

• IS THE ON SITE SOIL(S) SUITABLE FOR THIS TYPE OF CONSTRUCTION?

• IF NOT SUITABLE, WHAT CAN WE DO TO MAKE IS SUITABLE?

• 1. 6-12 BORINGS TO 15-FT OR AUGERREFUSAL

• 2. CLASSIFY ACCORDING TO AASHTOINCLUDING GROUP INDEX #

•3. REPORT CALIFORNIA BEARING RATIO•4. REPORT SWELL OR CONSOLIDATION

ON SAMPLES THAT MAY REQUIRE IT•5. TEST PERCOLATION RATE IN SITU•6. COMMENT ON SUITABILITY FOR SLAB-ON-GRADE CONSTRUCTION

•7. IF INSTALLING POST-TENSIONED CONCRETE = see 2-pg handout next slides

•

•

• 1. 6-12 BORINGS TO 15-FT OR AUGERREFUSAL

• 2. CLASSIFY •3. REPORT CBR•4. REPORT SWELL •5. TEST PERC•6. SUITABILITY•7. PT CONCRETE?

•

• WHO, WHAT

•WHEN, WHERE

• & SOMETIMES “WHY” (WHAT IS BEING BUILT)

• “TEST SOILS AT ____

• “TO CONSTRUCT ____

• “RUN _____ TESTS

• “CLASSIFY USING_____

• “RECOMMEND _____

• U.S. DEPT. OF AGRICULTURE = A, B, C, D

• U.S. DEPT. OF AGRICULTURE GROUPS AS… A, B, C, or D

•A = SAND OR SANDY LOAMHIGH INFILTRATION

•B = SILT OR SILT LOAMMODERATE INFILTRATION

•C = SANDY CLAY LOAMSLOW INFILTRATION

•D = CLAYVERY SLOW INFILTRATION

• U.S. DEPT. OF AGRICULTURE GROUPS AS… A, B, C, or D

• IF YOU KNOW HYDRAULIC SOILS GROUPS ON SITE THEN

•IT HELPS DETERMINE TESTING LOCATIONS

•REFER TO STATE REG’S FORREQ’D NUMBER OF TESTS/SF

•STATE MAY ALSO REQUIRE BUFFER ABOVE WATER TABLE

• U.S. DEPT. OF AGRICULTURE GROUPS AS… A, B, C, or D

• MANY STATES REQUIRE AMINIMUM INFILTRATIONRATE

•SOILS GROUP “D” DOESNOT MEET MINIMUMS

• CALIFORNIA BEARING RATIO “CBR”

• CALIFORNIA BEARING RATIO “CBR”

• UNIFIED SOILS CLASSIFICATION “UCS” = sands, clays, etc.

• ATTERBERG LIMITS = almost always run & charted

• “GRAIN SIZE” = GRAPH OF SIEVES= PERCENT PASSING

OR PERCENT RETAINED

• MAY HAVE AVERAGEDIAMETERS

• SHOWS BORING LOCATIONS AND NUMBERS

• SHOW TYPE OF SOIL TOP TO BOTTOM OF EACH BORE

• CLASSIFICATION (AASHTO, UCS, CBR)•RECITE SOME DATA FROM

TESTS• DESCRIBE SOIL PREP NEEDED* REMOVE TOPSOIL?* DEWATER?* REMOVE & REPLACE TO 8”?* REWORK TOP 24”?* LIME OR CEMENT?

• UP TO 90% OF THE CONTENT IS JUST DATAUSED TO MAKE GRAPHS

• FOCUS ON:A. ROCK? OR SUITABLE SOIL? B. SOIL TO REMOVE/REPLACE?C. METHODS TO PREP IT.D. WATER TABLE?

• CALIFORNIA BEARING RATIOS OF > 20?, > 50?• MINIMIZE FREEZE/THAW DIFFERENTIAL MOVEMENT? • DON’T BUILD ON PEAT, ORGANICS, SOILS WITH SWELL OR CONSOLIDATION ABOVE 1%, OR NON-HOMOGENIOUS SOILS.• ASK GEOTECH ENGINEER TO “COMMENT ON SUITABILITY FOR SLAB-ON-GRADE CONSTRUCTION AS IF YOU WERE BUILDING A PARKING LOT.