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（1 中國地質大學(北京)工程技術學院,北京 100083； 2 河北建設勘察研究院有限公司,石家莊 050000）

［摘要］后壓漿鉆孔灌注樁可以大大改善樁體的受力性能，提高單樁承載力，是對傳統(tǒng)工法的一項重大突破。在樁基設計中，單樁豎向承載力的確定影響到整個設計方案的科學性及合理性，決定著方案實施的成敗。某后壓漿鉆孔灌注樁試驗工程采用單樁豎向靜載荷試驗和高應變動測技術進行單樁承載力測試，通過對動靜試驗數(shù)據(jù)進行對比分析發(fā)現(xiàn)，兩種試驗方法測得的總阻力基本一致，而樁側摩阻力及端阻力的試驗結果稍有偏差，對存在的差異進行了合理的分析，從而可以更準確地確定單樁承載力，大大提高了試驗的精度。

［關鍵詞］后壓漿鉆孔灌注樁;靜載荷試驗;高應變

Contrast study on comparison between high strain dynamic test and static loading test of posterior grouting bored pile

Yang Shengbin1，Li Youdong2,Liu Wentao1

 (1 School of Engineering & Technology, China University of Geosciences, Beijing 100083, China；2 Hebei Research Institute of Geotechnique Investigation and Survey, Shijiazhuang 050000, China)

Abstract:The posterior grouting bored pile can greatly improve the pile′s bearing performance and increase the pile capacity through the improvement to traditional process. The vertical load capacity of single pile is so important that it determines the rationality and feasibility of the design. The vertical static load test and high strain dynamic test are used in a project of posterior grouting bored piles, and the test data is contrasted and analyzed. The results illustrate that the resistance got from the two methods is basically unanimous, though the side resistance and the tip resistance have a little difference. The result is analyzed reasonably, so the pile capacity can be determined accurately , which greatly improves the test accuracy.

Keywords:posterior grouting bored pile; static loading test; high strain