陈杭生¹，陈杭旭²
(1 浙江省建筑设计研究院，杭州310006; 2 浙江建设职业技术学院，杭州311231)

[摘要] 勘察方提供给设计方的单桩极限承载力与试桩取得的值普遍会有差异，有时差额还比较大。如果我们在工业厂房的每个柱下桩基均设柱下桩，并以此改变柱基的承台形式，同时在以后的沉桩施工过程中改变沉桩顺序，合理取用试桩的每级加荷值及试桩加荷的最大值，那么在不影响工期情况下，用工程桩做试桩就能起到用非工程桩做试桩的同样效果，得出试桩的确切极限承载力从而可以合理调整勘察数据。
[关键词] 柱下桩；桩的极限承载力；3～9桩承台

Study on the buildingpiles instead of piles testing in mul-piles cap of factory building
Chen Hangsheng¹,  Chen Hangxu²
(1Zhejiang Prov. Institute of ArchitecturaI Design and Research, Hangzhou 310006, China; 2 Zhejiang College of Construction, Hangzhou 311231, China)

Abstract: It is common that the pile bearing capacity value provided by the survey or to the designer ofen differs from that the pile bearing capacity site test and sometimes the difference could even be fairly substantial. Suppose that piles and the relevant caps are applied in a factory building, we can achieve the pile ultimate bearing capacity by means of adjusting the pile driven sequence and careful choosing the increment and maximum value of loads acting on the buildingpiles instead of piles testing within the project time limit so that the pile bearing capacity in the survey report can be reasonably modified.
Keywords: pile under the column;  pile ultimate bearing capacity;  foundation used for the 3～9 piles