Earthquake-induced liquefaction of soft sandy soil deposits has the potential to seriously damage all classes of overlying structures. The potential for damage can be reduced or even eliminated by soil improvement methods. However, such methods are usually not used in a big scale,as a result of excessive costs. Among the various methods of soil improvement, preloading and vibratory rollers have the advantages of lower cost. They have not been studied or used systematically for a seismic design. The project will study the capacity of preloading, vibro-rollers and other soil improvement methods to reduce liquefaction suceptibility without excessive costs. It will comprise the following tasks : 1. Verify the effectiveness of soil improvement by preloading and vibratory rollers, by a field test. The test program will include baseline testing, instrumentation, soil improvement and post-treatment dynamic testing. 2. Develop simple rules estimating the expected improvement of new sites, primarily by numerical analyses. 3. Develop quick easy tests to verify treatment during construction. 4. Compare preloading, vibro-rollers and other soil improvement methods in terms of their cost and level of reduction of liquefaction susceptibility.
Funding SchemeEAW - Exploratory awards