H＋Hat 组合型钢板桩结构性能研究

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。通过理论计算、室内试验、现场原位试验和数值模拟等手段对H＋Hat 组合型钢板桩的截面抗弯、锁口抗拉及锁口止水等结构性能进行了研究。研究结果显示：H＋Hat 组合型钢板桩具有比普通钢板桩更大的抗弯截面模量，且其抗弯工作性能良好；锁口抗拉容许强度远大于其实际运行的抗拉强度；锁口止水性能不差于普通钢板桩。研究为H＋Hat 组合型钢板桩在基坑、码头、船坞、围堰、库岸等工程中的推广应用提供了依据。

Structural Behavior of H+Hat Combined Steel Sheet Pile

H+Hat combined steel sheet pile has a broad prospect of application due to its simple structure,big ben-ding stiffness,repeated usage and cost effectiveness.However,it has not been applied in China yet and lack of verification.In view of this we carried out theoretical calculation,indoor experiment,in situ test and numerical simulation to research the sectional flexural performance,lock tensile performance and lock waterproof performance of H+Hat combined steel sheet pile.Results reveal that the sectional flexural modulus of H+Hat combined steel sheet pile is larger than that of ordinary steel sheet pile with good flexural performance;the allowable lock tensile strength is far greater than that in actual operation;and the lock waterproof performance is not worse than that of or-dinary steel sheet pile.The research could be a basis for the popularization and application of H+Hat combined steel sheet pile in foundation pit,piers,docks,cofferdam,and bank supporting structures.