对定产量生产，跟端压差随时间逐渐增大；
Under the constant production rate condition, the pressure difference at the heel increases with time.
根据输入的不同，在过载的条件下，输入端压降可能达到若干伏。
In an overload condition, the voltage burden can reach many volts, depending on the input value.
桩端压浆技术克服了传统钻孔灌注桩的不足，使桩的承载力提高、沉降量减小。
The technology of base grouting overcomes the shortcomings of traditional bored piles, improving the bearing capacity of piles and decreasing settlement.
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