【摘要】 南水北调澧河渡槽摩擦型基桩设计承载力特征值为14 108 kN,桩长62 m。采用自平衡法和高应变测试法对该工程试验桩进行承载力试验。试验采用自行设计的高应变锤击系统,得到试验岩土层分层侧摩阻力推荐值、桩端阻力推荐值、桩顶位移和单桩极限承载力。自平衡法和高应变法测试结果比较接近,可相互验证。设计的高应变锤击系统是合理、有效的。测试结果对类似工程具有参考价值。更多还原

【Abstract】 The designed bearing capacity characteristic value of 62 m long frictional pile in Lihe River aqueduct of South-to-North Water Transfer Project is 14 108 kN.The bearing capacity tests are conducted by combining self-balance method with high-strain method.With the self-developed high-strain hammer system is developed,several significant parameters are gained,including the recommended lateral friction of rock and soil layers,the recommended pile end resistance,the pile head displacement and the ultimate bearing capacity of single pile.The results of self-balance method and the high-strain method are much close,and they can verify each other.The high-strain hammer system is reasonable and effective for pile tests.The test results have reference values for similar projects.更多还原