H型护岸桩沉桩产生的超孔压及水平位移计算

H型桩由于特殊的截面形式，打桩过程引起的挤土效应特征不能简单地采用管桩的挤土规律代替。因此基于湖嘉申二期工程现场试验数据，研究其沉桩引起的超孔隙水压力和土体位移规律，通过修正的圆孔扩张模型考虑H型桩在扩孔时的特殊性，推导出适合H型桩的矩形孔扩张的计算公式。用该公式对沉桩产生的超孔压及土体位移进行计算，并与其他方法进行对比。结果表明，修正后的扩孔模型在计算H型桩的超孔压和土体位移方面充分考虑到孔隙水压力沿深度线性变化的特点，结果更加接近实测数据。

Calculation of Excess Pore Pressure and Horizontal Displacement Caused by H-shaped Revetment Pile Sinking

Due to the special cross section of H-shaped piles, the characteristics of soil compaction effect caused by pile driving cannot be simply replaced by the soil compaction law of pipe piles. Therefore, based on the field test data of Hujiashen Phase II project, this paper studies the laws of excess pore water pressure and soil displacement caused by pile sinking. Based on the modified circular hole expansion model, a calculation formula for rectangular hole expansion suitable for H-shaped piles is derived considering the particularity of H-shaped piles during hole expansion. The formula is used to calculate the excess pore pressure and soil displacement caused by pile driving, and compared with other methods. The results show that the modified expanded hole model fully considers the linear variation of pore water pressure along depth in calculating the excess pore pressure and soil displacement of H-shaped piles, and the results are closer to the measured data.