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    TAO Jing-hui, LIANG Shu-ting, FAN You-wei, ZHANG Yong-le, TAO Mao-zhi. Field tests on high-bearing composite foundation with plain concrete piles[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(4): 693-700.
    Citation: TAO Jing-hui, LIANG Shu-ting, FAN You-wei, ZHANG Yong-le, TAO Mao-zhi. Field tests on high-bearing composite foundation with plain concrete piles[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(4): 693-700.
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    Field tests on high-bearing composite foundation with plain concrete piles

    • 1. School of Civil Engineering, Southeast University, Nanjing 210096, China; 2. Jiangsu Provincial Architectural Design and Research Institute Co., Ltd., Nanjing 210029, China; 3. Jiangsu East China Geological Construction, Nanjing 210007, China; 4. Jiangsu Province Jianyuan Geologic Engineering and Investigation Co., Ltd., Nanjing 210029, China

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    • Received Date: January 17, 2011
    • Published Date: April 19, 2012
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    • The composite foundation with plain concrete piles is applied in the construction of a high-rise building. Various in-situ loading tests and stress tests of piles and soil are performed after excavation of foundation pits. The settlement and stress variations of the composite foundation are monitored during the construction period. Based on the test data, the work mechanism, load sharing characteristics of composite foundation, stress distribution of the piles, and settlement characteristics of the foundation are analyzed. Moreover, the effects of post-grouting technology of the piles on the work performances of the composite foundation are evaluated. The test results indicate that the composite foundation with plain concrete piles exhibits high bearing and small deformation capacities. The reinforcement without soil compaction technology has a reinforcing effect on the soil among piles. The application of post-grouting technology can improve the bearing capacity and reduce the settlement of the composite foundation, and high loading level may result in better reinforcing effects. The rigidities of the foundation slab and upper structure provide certain adjustment for non-uniform loads on piles. As a result, a variable rigidity design method based on the distribution of load and foundation pressure is proposed.
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