软土中浅埋法向承力锚位移破坏标准模型试验

发布时间：2018-06-10 03:03

本文选题：软黏土 + 法向承力锚　；参考：《岩土力学》2015年S1期

【摘要】：为确定浅埋软黏土中法向承力锚的位移破坏标准,利用实验室自行开发的电动伺服加载控制装置,对埋置在饱和软黏土中深度为3倍锚板宽度、系缆力角度为30°的法向承力锚模型进行了荷载和位移控制的静力加载试验。依据试验结果,以极限承载力与锚板宽度为参考,对锚板法向荷载与位移进行归一化处理,通过归一化曲线确定了法向承力锚的位移破坏标准,即破坏位移约为0.38倍锚板宽度。另外,依据锚板的尺寸、埋深及试验土体的强度条件,利用经验公式对锚的极限承载力进行了计算。结果表明,以该位移破坏标准确定的极限承载力与经验公式计算结果基本一致,两者相差均不超过10%,初步验证了该位移破坏标准的合理性。
[Abstract]:In order to determine the standard of displacement failure of normal bearing anchor in shallow soft clay, the electric servo loading control device developed by the laboratory is used, and the depth of embedded in saturated soft clay is 3 times the width of anchor plate. The static loading tests of the normal bearing anchor model with the mooring cable force angle of 30 掳are carried out under the control of load and displacement. Based on the test results and taking the ultimate bearing capacity and the width of the anchor plate as the reference, the normal load and displacement of the anchor plate are normalized. Through the normalized curve, the criterion of the displacement failure of the normal bearing anchor is determined, that is, the damage displacement is about 0.38 times the width of the anchor plate. In addition, the ultimate bearing capacity of the anchor is calculated by empirical formula according to the size of the anchor plate, the buried depth and the strength condition of the test soil. The results show that the ultimate bearing capacity determined by the criterion of displacement failure is basically consistent with the calculation result of empirical formula, and the difference between the two is not more than 10. The rationality of the criterion of displacement failure is preliminarily verified.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;天津大学岩土工程研究所;
【基金】：国家自然科学基金(No.51179120) 博士点基金(No.20130032110045)
【分类号】：TU447

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