There are many factors influencing the placing quality of caisson such as bed leveling quality sea conditions as well as the level of placing equipments.

影响沉箱安装质量的因素很多，如基床整平的质量、海况的好坏、安装设备是否先进等。

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Some influential factors on the design elevation for leveling a site and its revising steps to calculate the earthwork have been introduced.

介绍了以四角棱柱体土方公式为计算模型的试算法确定大型场地平整最优设计标高近似解的方法。

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