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预应力高强砼管桩(PHC)在建筑市场得到广泛应用,据不完全统计占桩基市场达80%以上。PHC管桩能够获得如此大的应用市场的主要原因是它具有耐打、耐压,穿透能力强,单桩竖向承载力高,抗震性能好,耐久性好,造价适宜,施工工期短,施工现场文明整洁等特点,深受业主、施工单位和设计人员的普通欢迎。预应力高强砼管桩有进一步发展趋势。但是在使用过程中,特别在施工时,经常发现诸如桩头暴裂、桩偏位、桩身偏斜等问题,给桩基工程带来不少麻烦,增加桩基处理费用等。为此,阐述了PHC管桩在软土地基加固中的一些基本应用,同时还介绍了一些质量控制措施,保证预应力管桩施工质量。
Prestressed high-strength concrete pipe pile (PHC) is widely used in the construction market, accounting for more than 80% of the pile-based market according to incomplete statistics. PHC pipe pile can get such a large application market is mainly due to its resistance to fight, pressure, penetration, single pile vertical bearing capacity, good seismic performance, durability, cost-effective, short construction period, Construction site civilized and tidy characteristics, by the owners, construction units and designers of the ordinary welcome. Prestressed high-strength concrete pipe pile has further development trend. However, problems such as pile head burst, pile deviation and pile deflection are often found in the course of using, especially during construction, which bring a lot of trouble to the pile foundation engineering and increase the processing cost of the pile foundation. Therefore, some basic applications of PHC pipe pile in soft ground reinforcement are expounded, and some quality control measures are also introduced to ensure the construction quality of prestressed pipe pile.