H+Hat组合型钢板桩构造简单、抗弯刚度大、可反复使用且经济性好,具有广泛的应用前景,但在国内尚未应用而缺乏验证。采用现场重复压、拔桩试验,对H+Hat组合型钢板桩的压、拔桩力变化规律及沉桩速度进行了研究。对反复压、拔工况下的全宽、锁口张开度、侧弯、翘曲变形进行了分析;对压桩设备进行了现场验证。结果表明:采用现有的施工设备能够较快地将H+Hat组合型钢板桩压入土体,H+Hat组合型钢板桩在反复压、拔后变形满足要求,可以在基坑、围堰、码头等工程中推广应用。
Abstract
H+Hat combined steel sheet pile has a broad prospect of application for its advantages of simple structure, big bending stiffness, repeated use and cost effectiveness, however, it has not been applied and lacks verification in China. Field test was conducted to study the variation of static pile press-extracting force and pile jacking speed; and the full width, lock opening, side bending and buckling deformation in the condition of repeated jacking and extracting were analysed; the applicability of static pile press-extracting machine was also verified. Results show that the existing machine can rapidly press the H+Hat combination steel sheet pile into soil and the deformation under repeated pressing and extracting meets standard requirement. It can be applied to engineering of foundation pit, cofferdam and wharf.
关键词
H+Hat组合型钢板桩 /
现场试验 /
沉桩速度 /
压拔桩力 /
变形
Key words
H+Hat combined steel sheet pile /
field test /
pile driving speed /
static pile press-extracting force /
deformation
中图分类号：
TV553
TU753.3
U445.551
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参考文献
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