地锚系统在钻孔灌注桩轴向大吨位静载试验中的应用
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摘要
针对在钻孔灌注桩轴向大吨位静载试验中常用的堆载法和锚桩法分别存在堆载安全风险大和锚桩施工难度大的弊端、自平衡法的转换计算可能会产生误差等问题,采用斜拉锚索作为反力装置的地锚系统,并在冠梁与圈梁之间通过对拉螺杆加以固定,实现在有限吹填区域内采用小型反力装置进行大吨位静载试验,为钻孔灌注桩桩长设计提供极限承载力数据支撑。
In terms of the high safety risk of stack method, great difficulty in construction of anchor pile method and potential conversion calculation error of self-balancing method in the axial compression large tonnage static load test of cast-in-situ bored pile, the ground anchor system is applied, in which the stayed anchor cable is used as the reaction device.The load crown beam and circle beam of the ground anchor system is fixed by the counter-pulling screw. The large tonnage static load test with small reaction device in the limited reclamation area is achieved, which can provide data support of ultimate bearing capacity for cast-in-situ bored pile length design.
In terms of the high safety risk of stack method, great difficulty in construction of anchor pile method and potential conversion calculation error of self-balancing method in the axial compression large tonnage static load test of cast-in-situ bored pile, the ground anchor system is applied, in which the stayed anchor cable is used as the reaction device.The load crown beam and circle beam of the ground anchor system is fixed by the counter-pulling screw. The large tonnage static load test with small reaction device in the limited reclamation area is achieved, which can provide data support of ultimate bearing capacity for cast-in-situ bored pile length design.
引文
[1]范磊,包自成,郭飞.锚桩堆载联合静载试验在工程中的应用[J].工程质量,2016,34(9):39-42.
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[2]龚维明,蒋永生,翟晋.桩承载力自平衡测试法[J].岩土工程学报,2000(5):532-536.
[3]张建林,张泽良,魏传海,等.中东地区锚杆系统在摩擦桩静载试验中的应用[J].施工技术,2013,42(6):100-102.