一、前言 预应力混凝土桩按JTJ222—83规范要求,在施工时期应满足强度要求和抗裂度要求,同时当桩的自由长度较大,且承受较大的轴向压力时,应对桩的压屈稳定性进行验算。而当沉桩困难时(如桩进入或穿过较厚的密实砂层等),应考虑锤击沉桩压应力的影响。 Preface Prestressed concrete piles according to JTJ222-83 standard requirements, during the construction period to meet the strength requirements and resistance to cracking requirements at the same time when the free length of the pile larger, and under greater axial pressure, the pile pressure Quasi stability check. However, when the pile sinking difficult (such as the pile into or through thick thick sand, etc.), should consider the impact of pile sinking compressive stress.