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为研究PHC管桩处理可液化地基的效果,结合工程实例,采用FLAC3D数值模拟软件研究PHC管桩复合地基受地震荷载作用下的抗液化特性,并就灌注桩与PHC管桩的加固效果进行了对比研究。研究结果表明,PHC管桩复合地基的抗液化能力较未加固地基大幅提高,在同一地震荷载下,PHC管桩复合地基的液化度为0.20,而未加固地基液化度为0.48;此外,根据动力计算结果对比分析,PHC管桩加固可液化地基效果较灌注桩更好。研究成果对PHC管桩加固可液化地基工程实践有一定指导意义。
In order to study the effect of PHC pipe pile treating liquefiable foundation and combining with engineering examples, the liquefaction resistance of PHC pipe pile composite foundation under earthquake load was studied by using FLAC3D numerical simulation software. The reinforcement effect of pile and PHC pipe pile was also studied Comparative Study. The results show that the liquefaction resistance of PHC pile composite foundation is much higher than that of unconfined foundation. Under the same seismic load, the liquefaction degree of PHC pile composite foundation is 0.20 and that of unconfined foundation is 0.48. In addition, Comparison of calculation results, PHC pipe pile liquefiable ground reinforcement effect better than the bored pile. The research results have certain guiding significance to the practice of PHC pipe pile liquefiable foundation engineering.