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利用预埋钢筋应力计和滑动测微计进行了强夯加固后的软弱土地基的桩身应力应变测试,探讨了钢筋应力计焊接、混凝土浇筑、静载试验堆载配重吊装等对测试的影响,给出了提高测试精度的建议。分析了弹性模量随桩身应变的变化关系,研究了不同荷载作用下的桩侧摩阻力及端阻力分布规律、桩侧摩阻力随桩顶沉降的发挥性状以及粉砂层、粉质黏土层的桩侧摩阻力随该土层桩土相对位移的发挥性状。研究成果可供同类工程项目的设计和科研参考。
The stress and strain of the pile body in soft soil foundation strengthened by dynamic compaction were tested by using embedded steel bar stress meter and sliding micrometer. The influences of the tests such as steel bar stress meter welding, concrete pouring, static load test, Influence, given the recommendations to improve the accuracy of the test. The relationship between the elastic modulus and the strain of the pile body is analyzed. The distribution law of the friction and the end resistance of the pile under different loads are studied. The frictional resistance of the pile with the settlement of the top of the pile and the characteristics of silt layer, silty clay layer Pile lateral friction with the soil layer pile soil relative displacement performance. Research results for similar projects for the design and research reference.