| EPSRC Reference: |
GR/R20328/01 |
| Title: |
In-Situ Densification as a Liquefaction Resistance Measure For Bridge Foundations |
| Principal Investigator: |
Madabhushi, Professor SPG |
| Other Investigators: |
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| Department: |
Engineering |
| Organisation: |
University of Cambridge |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 March 2002 |
Ends: |
31 August 2005 |
Value (£): |
169,337
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| EPSRC Research Topic Classifications: |
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| EPSRC Industrial Sector Classifications: |
| Construction |
Transport Systems and Vehicles |
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Summary on Grant Application Form |
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The effectiveness of the in-situ vibro-densification methods to improve the liquefaction resistance of a given site needs to be understood. Understanding the mechanism of excess pore water pressure migration from the unimproved region into the densified zones below bridge foundations would lead to improvements in current design and construction practises. Optimisation of the region to be densified below will lead to more economical designs. Further, the effect of vibro-densification on the dynamic response of the bridge deck - pier - foundation system needs to be evaluated. This proposal consists of three distinct phases. In Phase I three high quality centrifuge models of saturated sand beds at different relative densities will be built using a new automatic sand pouring equipment. The excess pore pressures observed in these sand beds along with those in the literature will be used to determine the soil parameters for the P-Z Mark III soil model to be used in the numerical analysis. The Phase II will consist of six centrifuge tests of bridge systems with different geometry of densified zones below the pier foundation. In Phase III numerical predictions will be made for the same bridge system using the soil parameters from Phase I analyses. The results from FE analyses will be compared with the centrifuge test data. On satisfactory performance of the FE based numerical procedure in predicting both Phase I and II experiments, they can be used with confidence in analysing prototype bridge structures involving complex geometries and in formulating design rules for use by the Industry.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.cam.ac.uk |