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自重湿陷性黄土地基上的桩基设计的基本特点,是须考虑施加于桩体上的附加荷载。这种附加荷载是由桩周土体在湿陷时所产生的负摩擦力引起的。在(СНиП11-17-77)规程和《桩基设计手册》(莫斯科1980年版)中对于负摩擦力计算的规定缺乏充分的依据,在大多数的情况下给出的桩基承载
The basic characteristic of the pile foundation design on the self-heavy collapsible loess foundation is to consider the additional load imposed on the pile body. This additional load is caused by the negative friction generated when the soil around the pile sinks. The provisions of the (СНиП11-17-77) and the “Pile Foundation Design Manual” (Moscow 1980 edition) for the calculation of negative friction are not well-founded, and in most cases the bearing of the pile foundation is given.