Effects of jet grouting on the performance of braced retaining wall
This project studies and reports on the performance and behavior of braced excavation under the presence of jet grout piles. Two-dimensional analyses were carried out with the help of finite element software PLAXIS 2D. The analyses were carried out for a 20 m deep excavation in clay support...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/49230 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | This project studies and reports on the performance and behavior of braced excavation under
the presence of jet grout piles. Two-dimensional analyses were carried out with the help of
finite element software PLAXIS 2D.
The analyses were carried out for a 20 m deep excavation in clay supported by a 26 m long
wall. A total of 108 different cases were considered where the presence and thickness of the
jet grout piles were varied. Varying excavation widths, wall stiffness and clay undrained
shear strength were also considered. Comparisons of the retaining wall deflections, wall
bending moments, strut forces, basal heave safety factor and plastic points patterns were
carried out.
In general, jet grouting performs more effectively in low strength soil compared to high
strength soil. Results indicate that the presence of jet grout effectively reduces the wall
deflection especially for retaining walls with lower stiffness. Strut forces on the other hand
are more effectively reduced for struts closer to the formation level than struts close to the
ground surface. |
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