海淤土地基挡潮闸基础设计

某挡潮闸为在深厚海淤土地基上建闸筑堤，需采取合理基础及地基处理措施解决承载力、变形量及地基变形协调问题。通过方案比较，确定闸室采用半封底沉井基础，岸翼墙采用灌注柱基础。通过现场桩基试验，研究了海淤土中采用粉喷桩复合地基对灌注桩水平承载能力的提高效果。结果表明，提出的基础方案成功解决了工程存在的地质问题，节约了工程投资。

Design of foundation on sea-silt groundsill for a tidal gate

In order to build foundation and embankment on deep sea-silt groundsill for the construction of a tide gate， it is necessary to solve the problems from the bearing capacity， deformation amount and the deformation compatibility of groundsill with reasonable foundation and groundsill treatment measures.Through a comparison among the relevant schemes， it is determined that a caisson foundation with half-sealed bottom is adopted for the gate chamber， while a cast-in-place pile foundation is applied to the bank wing-wall.In accordance with the in-situ pile foundation test， the effect from the adoption of the composite foundation of cement injection pile to enhance the horizontal bearing capacity of the cast-in-place pile is studied.The result shows that the geological problems from the project are successfully solved by the proposed foundation treatment scheme along with the investment saving for the project.