Field experimental study on force on the body of sheet pile reinforced revetment
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1. Geotechnical Research Institute, Hohai University, Nanjing 210098, China;2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;3. Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China;4. Construction Project Quality Supervision Station of Huzhou, Huzhou 313028, China

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    Abstract:

    The magnitude and distribution mode of the skin friction resistance has considerable influence on the settlement of the sheet pile, and further on the stability of the revetment reinforced by the sheet pile. The settlement is an important study content while the sheet piles of the revetment structure are driven to the relatively hard layer. Field experiment is carried out in the actual sheet pile improved revetment project at Huzhou section of Chang-Hu-Shen waterway to research the distribution mode and magnitude of the sheet pile's skin friction resistance. Stress gauges are arranged on the axial line in the pre-process of the sheet pile, and the jointing and embedding manner are presented. Through detected stress gauges, the axial force and the load transfer mechanism are adequately studied respectively in the harden progress and the loading procedure. The stress gauges in the sheet pile will bear pull force firstly then turn into press force and tend to be stable during the concrete solidify progress. Stress gauges should be recalibrated to analyze the load transfer mechanism under increasing loading, owing to the great inference of construction load on the stress gauges. The axial force of the top pile exhibited considerable variation, but the middle and under part of the pile show small changes but large values, and the pile load on the top is easily transformed. The skin friction resistance is fully played near the top pile; it accounts for 40 percent of the all skin friction resistance for distance shorten than 0.3 meters to the top pile. The recommended value of the ultimate skin frictional resistance in the Technical Specifications (JGJ 94—2008)is much larger, and the measured maximum friction is only 63.9% of the recommended value.

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许春虎,陈永辉,王新泉,石刚传.板桩加固护岸桩身受力现场试验研究*[J].水运工程,2012,(3):14-19

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  • Online: March 22,2012
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