| Author | Warat Kongkitkul |
| Call Number | AIT Thesis no. GE-00-18 |
| Subject(s) | Soil consolidation test
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-00-18 |
| Abstract | Pullout tests were modified by installing the clamping system inside the pullout
box in order to reduce the effects of necking phenomenon, hereinafter called in-soil
pullout tests. These in-soil pullout tests were conducted on two types of hexagonal wire
mesh, namely: (a) zinc-coated hexagonal wire mesh; (b) PVC-coated hexagonal wire
mesh. The hexagonal wire mesh specimen length was 0.70 m. The specimen widths were
equal to 0.40 m and 0.50 m for zinc-coated and PVC-coated hexagonal wire meshes,
respectively. The Ayutthaya silty sand was used as the backfill material. The pullout tests
were conducted at three different applied normal pressures of 55, 80 and 105 kPa, and the
pullout rate of 1 mm/min was adopted. Moreover, in-air tensile tests with and without
two constrained rods at the sides of the hexagonal wire mesh were conducted on both
conventional and wide-width specimens which have the specimen lengths equal to 0.50
m and 0.25 m, respectively. Using wide-width tensile tests, the ultimate in-air tensile
strengths of zinc-coated and PVC-coated hexagonal wire meshes were 46.00 kN/m and
44.83 kN/m, respectively. The constrained rods have not much effects in the results of
wide-width tensile tests. Using constrained rods on the conventional hexagonal wire
mesh specimen, the ultimate in-air tensile strength increased from 27.04 kN/m to 44.60
kN/m and from 33.04 kN/m to 42.67 kN/m for zinc-coated and PVC-coated hexagonal
wire meshes, respectively. The analytical modeling was proposed to predict the pullout
resistance and displacement relationships on both zinc-coated and PVC-coated hexagonal
wire meshes. The pullout resistance from the analytical modeling consists of bearing and
frictional resistances. The bearing resistance was computed by hyperbolic model while
the frictional resistance was calculated by linearly, elastic-perfectly plastic model. From
the analytical modeling, the frictional resistances were 15% and 14% of the total pullout
resistance for zinc-coated and PVC-coated hexagonal wire meshes, respectively.
Consequently, the bearing resistances were 85% and 86% of the total pullout resistance
for zinc-coated and PVC-coated hexagonal wire meshes, respectively. The numerical
modeling for interaction between hexagonal wire mesh and silty sand backfill was carried
out by using FLAC30 finite difference program. The hexagonal wire mesh reinforcement
was modeled as a rough sheet element embedded in silty sand backfill. From the finite
difference analyses, the interaction coefficients, R, obtained from the numerical
modeling, were equal to 0.90 and 0.65 for zinc-coated and PVC-coated hexagonal wire
meshes, respectively.
|
| Year | 2001 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-00-18 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Bergado, D.T.; |
| Examination Committee(s) | Balasubramaniam, A. S.;Miura, Kinya |
| Scholarship Donor(s) | Government of Austria ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2001 |