阵列式位移计测试技术在吸入式组合桩力学试验中的应用

Application of Shape Acceleration Array Technology to Lab Test of Clustered Suction Piles

阵列式位移计(SAA)应用微电机系统(MEMS)加速度测试仪测量相应的位移,倾斜角和加速度。该方法具有很高的精度,且该系统能够动态跟踪测试,并且可以重复利用。本文介绍了SAA测试系统在吸入式组合桩承载力特性模型试验研究中的应用,该模型试验研究了不同长径比、荷载作用角度和桩间距3个重要因素对桩的斜向承载力的影响。结果表明:SAA测试系统可全面,直观地反映出组合桩模型在不同长径比、荷载作用角度和桩间距的桩体在不同级的荷载下的沿着桩深各点位移情况,而且能较好的显示桩体在极限荷载的情况下位移的突变,为桩体周围土体的极限荷载下的破坏标准的确立提供依据。

Shape acceleration array( SAA) take use of the microelectromechanical systems( MEMS) acceleration tester to measure the corresponding displacement,Angle and acceleration. This method has high precision,can collect test results dynamically,and can be reusable. This paper introduces the application of SAA testing system in the model test of bearing capacity of clustered suction piles under different length to diameter ratio,different space between the piles legs and under different load Angle. Results indicate that the SAA testing system can be used for deep foundation testing and system can collect the displacement data of clustered suction pile model with different length to diameter ratio,different space between the piles legs and under different load Angle and can properly display the displacement mutation of pile under the condition of the ultimate load,provide the basis for the destruction standard of soil near the clustered suction piles under the ultimate load.