Application of Dynamic Compaction in Highway: A Case Study |
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| Authors: | Linchang Miao Gong Chen Zhenshun Hong |
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| Institution: | (1) Institute of Geotechnical Engineering, Southeast University, Nanjing, 210096, P.R. China;(2) Department of Highway Construction of Jiangsu Province, Nanjing, 210004, P.R. China |
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| Abstract: | The application case of dynamic compaction (DC) is realized in highway. In this paper, the in situ tests for evaluating effectiveness of DC are performed on a liquefiable soil and soft soil interbedding foundation encountered
in highway engineering practice. Excess pore pressure, total surface settlement and lateral deformation under DC impact are
measured and analysed. The cone penetration test (CPT) and spectral analysis of surface wave (SASW) are used for investigating
the compaction effectiveness. The formulation of the predicting improvement depth of the DC is presented according to the
pseudo-static mechanics method and is of obvious meaning of soil mechanics compared with Mendard’s formulation. The calculating
results of the formulation of improvement depth of the DC are agreement with the measuring results. The investigation results
indicate that the DC technique is an effective way for improving liquefiable soil and soft soil interbedding foundation in
highway engineering practice. |
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| Keywords: | CPT dynamic compaction highway pseudo-static mechanics method SASW |
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