梯形断面竖向预应力锚索抗滑桩模型试验研究  

Experimental investigation on the trapezoidal cross-section vertical pre-stressed anchor anti-slide pile model

作　　者：彭瑜 陈洪凯[1] 赵春红 PENG Yu;CHEN Hongkai;ZHA0 Chunhong(Geotechnical Engineering Institute, Chongqing Jiaotong University, Chongqing 400074 , China;Beijing Investigation and Design Institute Co. ,Ltd. ,Power Construction Corporation of China, Beijing 100024 , China)

机构地区：[1]重庆交通大学岩土工程研究所,重庆400074 [2]中国电建集团北京勘测设计研究院有限公司,北京100024

出　　处：《四川建筑科学研究》2018年第6期63-68,共6页Sichuan Building Science

基　　金：国家自然科学基金项目(51378521);重庆市自然科学基金重点项目(2013JJB0005)

摘　　要：为研究梯形断面竖向预应力锚索抗滑桩力学性能和破坏形态,通过梯形断面竖向预应力锚索抗滑桩和矩形断面钢筋混凝土抗滑桩的破坏性试验,分别探讨了受力性能和破坏形式的特征,以及对其受荷能力和破坏程度等方面进行了实测比较,并在梯形抗滑桩试验的基础上,确定了梯形断面预应力锚索抗滑桩的安全系数,分析了梯形抗滑桩和矩形抗滑桩的受压性能,推导了梯形抗滑桩破坏面的计算公式。结果表明:梯形抗滑桩的受力性能远高于矩形抗滑桩受力性能;梯形抗滑桩的破坏形态更优于矩形抗滑桩;梯形断面预应力锚索抗滑桩的安全系数取值范围为1. 27～1. 35;梯形抗滑桩改善了矩形抗滑桩的受压性能,其受压性能提高了22. 5%。研究成果可为同类工程提供理论参考。In order to study the mechanical properties and failure pattern of trapezoidal section vertical prestressed anchor cable antislide pile,the destructive tests of trapezoidal section vertical prestressed anchor cable anti-slide pile and rectangular section reinforced concrete anti-slide pile were carried out. The characteristics of mechanical behavior and failure form were discussed respectively,and the actual measurement and comparison of loading capacity and failure degree were made. Based on the test of trapezoidal anti-slide pile,the safety factor of trapezoidal prestressed anchor cable anti-slide pile was determined. The compressive behavior of trapezoidal anti-slide pile and rectangular anti-slide pile was analyzed,and the calculation formula of the failure surface of trapezoidal anti-slide pile was derived. The results show that the mechanical behavior of trapezoidal anti-slide pile is much higher than that of rectangular anti-slide pile. The failure mode of trapezoidal anti-slide pile is better than that of rectangular anti-slide pile. The safety factor of prestressed anchor cable anti-slide pile with trapezoidal section is 1. 27 ~ 1. 35. The compression performance of rectangular anti-slide pile is improved by trapezoidal anti-slide pile. Its compression performance has been improved by 22. 5%. The research results can provide theoretical reference for similar projects.

关 键 词：梯形抗滑桩 矩形抗滑桩 试验模型 破坏面 计算公式 

分 类 号：TU473.1[建筑科学—结构工程] U417.1[建筑科学—土工工程]