字清汉，号挺生，南通州（今江苏南通）人。写兰法郑思肖，画竹师苏轼，皆深造自得，梅菊尤佳。
基于可反映桩基荷载传递性状的“套叠”式桩周土变形模式和弹性理论，将等直径部分和扩径体部分桩周土分段建立位移方程，推导了桩身带有扩径体的非刚性和刚性DX抗拔桩的荷载-位移关系的解析解。
Based on the elastic theory and the overlapped-form strain mode of the soil, the paper deals with an analytical solution for the load-displacement relationship of non-rigid and rigid DX pullout pile.
坑底以下有效桩长相同时，开挖深度越大，开挖后桩周土体超固结比越大，抗拔桩极限承载力也越大。
When the length of the pile under the bottom of the pit is the same, the deeper the excavation is, the larger the ultimate uplift capacity of pile is.
扩底桩的上拔破坏模式随埋深增大由桩周土体倒圆锥台形破坏变为扩底圆周土体局部破坏。
The failure pattern of the soil around the pile changed from inverted truncated cone slip-surface to local failure around the enlarged base with the increase of embedment ratio.
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