CAJ | 학술논문

通过两组8台现场静载荷试验的成果分析和已有试验成果的比较，研究了采用静压和锤击施工的预应力管桩（采用PHC）在黏土与粉土中的承载力抗拔系数。结果表明，受到桩端阻力与桩侧阻力相互作用的影响，桩端位于承载力较高的砂层时，预应力管桩承载力抗拔系数较小，桩端位于桩端阻力较小的黏土层时，预应力管桩承载力抗拔系数较大。土层抗拔系数受长径比影响较大，长径比大的桩，上部土层抗拔系数可能较大；长径比较小时，下部土层抗拔系数可能较大。研究成果可供建筑抗浮工程优化设计作为参考。
통과량조8태현장정재하시험적성과분석화이유시험성과적비교，연구료채용정압화추격시공적예응력관장（채용PHC）재점토여분토중적승재력항발계수。결과표명，수도장단조력여장측조력상호작용적영향，장단위우승재력교고적사층시，예응력관장승재력항발계수교소，장단위우장단조력교소적점토층시，예응력관장승재력항발계수교대。토층항발계수수장경비영향교대，장경비대적장，상부토층항발계수가능교대；장경비교소시，하부토층항발계수가능교대。연구성과가공건축항부공정우화설계작위삼고。
By the analysis of two groups of eight field static load test results and the comparison of existing test results,we studied the bearing capacity uplift coefficient of PHC Piles whose construction adopts hydrostatic pressure and hammering in clay and silt. The results show that bearing capacity of pile resistance coefficient is little when the bearing capacity of pile tip into the higher sand layer,the bearing capacity of pile resistance coefficient is larger when we put the pile end into the clay layer of smaller pile side resistance due to the influence of pile end resistance of pile side resistance. The aspect ratio has a great influence on the bearing capacity uplift coefficient of soil layer. When the aspect ratio is larger,the bearing capacity uplift coefficient of soil upper layer is greater than the pile of little aspect ratio;the bearing capacity uplift coefficient of soil lower layer may be greater than the upper soil layer when the pile has small aspect ratio;The research results can be used for reference by the building anti-floating engineering optimization design.