11.10.2014 Views

Four Corner - Texas Water Development Board

Four Corner - Texas Water Development Board

Four Corner - Texas Water Development Board

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

KEY TO TERMS AND SYMBOLS USED ON BORING LOGS<br />

SOIL SYMBOLS<br />

SAMPLER TYPES<br />

~<br />

Clay<br />

~<br />

Clayey<br />

t====<br />

~----<br />

~----<br />

·---- ~<br />

Asphaltic<br />

Concrete<br />

illillJ<br />

Sail Tvpes<br />

·········•<br />

~<br />

Silt<br />

Sand<br />

•<br />

Modifiers<br />

.. . I<br />

!<br />

Silty Sandy<br />

Construction ~faterials<br />

~ ~<br />

i I j .11 .1\. 1'\ 1\. AI<br />

~~~ ·~·~: ,/\ 1\ 1\. AI<br />

A 1'\ A AI<br />

K ._ ;.., ~.:<br />

Stabilized<br />

Base<br />

~<br />

Fill or<br />

Debris<br />

lj ~· "<br />

~<br />

I<br />

Gravel<br />

0<br />

1~'1 e o .,<br />

0<br />

• •<br />

0 I<br />

,•, .~.,<br />

Cemented<br />

~<br />

~<br />

~<br />

Portland<br />

Cement<br />

Concrete<br />

IJ<br />

Thin Walled<br />

Shelby Tube 0<br />

Split Barrel<br />

: 200 mm<br />

Particle Size or Sieve<br />

: B in.<br />

DENSITY OF COHESIONLESS SOILS<br />

Descriptive<br />

Term<br />

Very Loose<br />

Loose<br />

~fedium Dense<br />

Dense<br />

Very Dense<br />

Penetration<br />

Resistance ··~" •<br />

Blows/Fool<br />

a - 4<br />

4 - 10<br />

10 - 30<br />

30 - 50<br />

> 50<br />

CONSISTENCY OF COHESIVE SOILS<br />

ConsistencY<br />

Very Soft<br />

Soft<br />

Firm<br />

Stiff<br />

Very Stiff<br />

Hard<br />

Unrlrainerl Shear<br />

Stren•th ( tsfl<br />

o - a t25<br />

0.125 - 0.25<br />

0.25 - 0.5<br />

0.5 - 1.0<br />

1.0 - 2.0<br />

> 2.0<br />

3-10-15<br />

50/4"<br />

0/18"<br />

PENETRATION RESISTANCE<br />

Blows required to penetrate three consecutive 6-inch increments per AST)I D-1586<br />

I! more than 50 blows are required. driving is discontinued and penetration at 50 blows is noted<br />

Sampler penetrated full depth under weight of drill rods and hammer<br />

" The ~ value is taken as the blows required to penetrate the final 12 inches<br />

Slickensided<br />

Fissured<br />

Inclusion<br />

Parting<br />

Seam<br />

Layer<br />

Fracture planes appear polished or<br />

glossy, sometimes striated<br />

TERMS DESCRIBING SOIL STRUCTURE<br />

Breaks along definite planes of fracture<br />

with little resistance to fracturing<br />

Small pockets of different soils, such<br />

as small lenses of sand scattered<br />

through a mass of clay<br />

Inclusion less than 1/4 inch thick<br />

extending through the sample<br />

Inclusion 1/4 inch to 3 inches thick<br />

extending through the sample<br />

Inclusion greater than 3 inches thick<br />

extending through the sa.mple<br />

Laminated<br />

Stratified<br />

Intermixed<br />

Calcareous<br />

Ferrous<br />

Nodule<br />

Soil sample composed of alternating<br />

partings of different soil type<br />

Soil sample composed of alternating<br />

seams or layers of different soil type<br />

Soil sample composed of pockets of<br />

different soil type and laminated or<br />

stratified structure is not evident<br />

Having appreciable quantities of calcium<br />

carbonate<br />

Having appreciable quantities of iron<br />

A small mass or irregular shape<br />

PLATE 9

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!