圆形截面抗滑桩配筋方式优选  

Optimal selection of circular cross-section anti-slip pile reinforcement method

作　　者：陈涛 李坚 杨龙伟 江强强[1] CHEN Tao;LI Jian;YANG Longwei;JIANG Qiangqiang(Geotechnical Branch of China Coal Technology and Industry Group Wuhan Design and Research Institute Co.,Ltd.,Wuhan 430061,China;School of Geological Engineering and Surveying and Mapping,Chang an University,Xi an 710000,China)

机构地区：[1]中煤科工集团武汉设计研究院有限公司岩土分公司,湖北武汉430061 [2]长安大学地质工程与测绘学院,陕西西安710000

出　　处：《水利水电快报》2023年第5期73-78,95,共7页Express Water Resources & Hydropower Information

基　　金：国家自然科学基金(42007279);中国煤炭科工集团有限公司科技创新创业项目(2020-NQ006)。

摘　　要：圆形截面抗滑桩作为抗滑桩的一种形式,采用机械成孔,不仅能够缩短工期,而且能够有效避免人工挖孔所存在的风险。基于ABAQUS有限元软件对3种配筋形式(沿桩周均匀配筋、沿桩周非均匀配筋和配置矩形钢筋笼)的抗滑桩支护滑坡在静力荷载作用下的位移、钢筋受力特点等进行定量分析研究。研究结果表明:①相同荷载作用下,圆形非均匀配筋抗滑桩与矩形钢筋笼抗滑桩支护效果相对较好;②选用圆形非均匀配筋形式和矩形钢筋笼形式能够较大程度发挥钢筋作用。③当配筋量不大时,在可以准确定位情况下选用圆形非均匀配筋形式,可在满足承载力要求的同时节约钢筋量,但在滑坡推力较大,配筋量较大时,用矩形钢筋笼形式更有利于钢筋的布置。As a way of anti-slide pile,circular cross-section anti-slide pile adopts mechanical hole forming can shorten the construction period and effectively avoid the risks of manual hole digging.Based on ABAQUS finite element software,the quantitative analysis and research were carried out on the displacement and stress characteristics of reinforcement under static load of landslide supported by anti-slide piles with three reinforcement forms(uniform reinforcement along the pile circumference,non-uniform reinforcement along the pile circumference and rectangular reinforcement cage).The research results showed that:①Under the same load,the supporting effect of rectangular reinforcement cage anti-slide pile and circular non-uniform reinforcement anti-slide pile was relatively good;②The circular non-uniform reinforcement form and rectangular reinforcement cage form can play a greater role in reinforcement.③When the amount of reinforcement was small,the circular non-uniform reinforcement form can be selected under the condition of accurate positioning,which met the requirements of bearing capacity and cansave the amount of reinforcement.However,when the landslide thrust and the amount of reinforcement were large,the rectangular reinforcement cage form was more conducive to the arrangement of reinforcement.

关 键 词：抗滑桩 滑坡 均匀配筋 非均匀配筋 矩形钢筋笼 

分 类 号：V213.152.1[航空宇航科学与技术—航空宇航推进理论与工程]