应力波在预制管桩接头处传播性能的试验研究  

Experimental Research on Conductivity of Stress Wave in the Splicers of Pre-cast Pipe Piles

作　　者：黄良机 林奕禧 黄春晓 张文镇 

机构地区：[1]珠海市建设工程质量监督检测站

出　　处：《工程质量》2005年第6期21-24,共4页Construction Quality

摘　　要：通过现场试验,揭示了桩接头在未入土时,桩顶测到的接头处的反射波信号综合反映了接头处端头板接触面的接触情况和焊缝的焊接质量;并结合计算,指出了在一般情况下,焊缝阻抗比βh约为接触阻抗比βm平均值的1.5～3.0倍,其两者之和组成的接头阻抗一般小于桩身截面阻抗。最后还指出,要想利用反射波信号来评估接头质量,需综合考虑各种影响因素,读者可以建立一些地区性的判例或进行数值模拟。Site experiments show that situation of contact surface of the end plate in the splicers and the welding quality can be judged by the reflected wave from the splicers received at the top of the piles.Calculation shows that impedance ratio of welding seam βh is 1.5 to 3 times of average value of contact impedance ratio and impedance of splicer formed by the sum of the two value is usually smaller than the impedance of pile section. However the paper also indicates that various factor shall be considered in evaluating quality of splicers with signals of reflected wave.

关 键 词：试验研究 预制管桩 应力波 性能 传播 现场试验 焊接质量 接头质量 数值模拟 反射波 阻抗比 接触面 端头板 平均值 地区性 焊缝 信号 桩顶 桩身 

分 类 号：TU473.13[建筑科学—结构工程] O347.4[建筑科学—土工工程]