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PULLOUT CAPACITY OF BLOCK ANCHOR IN UNSATURATED SAND Naser Al-Shayea1
 

Summary: PULLOUT CAPACITY OF BLOCK ANCHOR IN UNSATURATED SAND
Naser Al-Shayea1
1
Civil Engineering Department, KFUPM, Box 368, Dhahran 31261, Saudi Arabia;
PH (966 3) 860-2480; FAX (966 3) 860-2879; e mail: nshayea@kfupm.edu.sa
ABSTRACT
Block anchor is an interface element used to restrain horizontal movement of
structures. This paper investigates the effect of moisture conditions (or degree of
saturation) on the pullout capacity of block anchor embedded in sand at three
different moisture conditions. The approach taken consists of experimental work, and
analytical calculation. The experimental work is pullout tests, made in the laboratory,
on 0.15 x 0.15 x 0.15m concrete block anchors embedded in sand, at a depth of
0.15m. The sand is deposited in a 1.2 x 0.6 x 0.8m box using a pluviation method to
ensure a uniform and reproducible density. Materials used were characterized to find
their properties, and the equipments used were calibrated before usage. The load and
the corresponding horizontal and vertical displacements were recorded. In addition,
visual observations were made on the failed soil body. The experimental results are
compared with the analytical calculations (by Rankine, Coulomb, and log spiral
theories). The 3-D effect was also considered.
The block anchor was found to have higher pullout capacity than a plate anchor. The

  

Source: Al-Shayea, Naser Abdul-Rahman - Department of Civil Engineering, King Fahd University of Petroleum and Minerals

 

Collections: Engineering