The time and spatial effects of excavation considering the variation of water head difference between the inside and the outside of a foundation pit were then investigated.
研究了考虑坑内外水头差变化时的基坑工程时间效应和空间效应，并与不考虑坑内外水头差变化的情况进行了对比。
Influenced by cohesion, the water head difference in silt is more than that in sand when seepage failure takes place. Influenced by piles, the water head difference of seepage failure also increases.
受黏聚力的影响，粉土破坏时的水头差较砂土大，同时基桩的影响也会增大破坏时的水头差。
If the transport of liquid viscosity and density difference between the larger and water, shall account for the pump parameters: flow, pressure head and shaft power.
若被输送液体的粘度和密度与水相差较大时，应核算泵的特性参数：流量、压头和轴功率。
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