终止压桩力及承载力标准值实测方法探求

Methods of in-Situ Tests for Final Pile Pressure and Bearing Standard Value

需要多大的压桩力才能将桩压入设计预定的标高,获得最大的单桩承载力,这是工程上最实际、最有价值的问题之一。本文通过静力压桩及静载试验求取适合于工程实际情况的终止压桩力与单桩极限承载力的关系,并通过钢弦式应力计在预应力管桩中的应用,论述了由测应力计频率到求取单桩极限侧阻力标准值及极限端阻力标准值的过程和原理。

How much pressure need before piling into the design elevation and getting the largest bearing capacity of single pile, it is the most practical and valuable question in engineering. The real engineering practice for the relation of final pilepressure and ultimate bearing capacity of single pile is obtained through the static piling and load test. According to the application of steel chord stress meter to prestressed tubular pile, the process and principle of limit shaft resistance standardvalue and limit end bearing standard value are discussed by measuring the frequency of the stress meter.