PHC桩在粘性土中沉桩上浮问题探讨

Study on Problem of Driven Pile Floating for PHC Pile in Cohesive Soil

驻马店某工程场地地基土均为粘性土,在桩基原体试验中,PHC桩出现上浮,并导致部分PHC桩出现断桩、承载力不足等严重缺陷,造成很大安全隐患,处理起来不但需投入大量资金、人力、物力,而且又会延误工期。通过工程实例,分析出导致PHC桩上浮的原因,并提出有效的预防措施。

The cohesive soil which was found in an engineering site in Zhumadian caused PHC piles to float in prototype test of pile function. The following problems such as broken piles and lack of bearing capacity brought potential safety hazard which need a great deal of cost, manpower and materirals to deal with and would cause the construction delay. Through practical project example, the article will give the reasons of PHC pile floating and effective preventive mesaures.