柔性双排长短组合桩滑坡推力的计算方法  

Calculation method of thrust force on the flexible double row long-short piles

作　　者：申永江[1] 杨明[1,2] 项正良 申永志 SHEN Yong-jiang;YANG Ming;XIANG Zheng-liang;SHEN Yong-zhi(School of Civil Engineering,Central South University,Changsha,Hunan 410075,China;Ningbo Urban Construction Design ＆ Research Institute Co.,Ltd.,Ningbo,Zhejiang 315012,China;Xingtai Jingrun Landscaping Engineering Co.,Ltd.,Xingtai,Hebei 054000,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]宁波市城建设计研究院有限公司,浙江宁波315012 [3]邢台景润园林绿化工程有限公司,河北邢台054000

出　　处：《岩土力学》2018年第10期3597-3602,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.41102171)~~

摘　　要：双排长短组合桩是一种新的桩型,能够克服常见双排桩的不足,具有很好的工程应用前景,研究其滑坡推力的计算方法具有重要意义。在Winkler弹性地基梁模型的基础上,充分考虑受荷段与嵌固段的变形协调关系,结合极限平衡条件,推导了当抗滑桩为柔性桩时,桩后滑坡推力呈梯形分布时,双排长短组合桩的前、后排桩滑坡推力的计算方法。对比理论计算结果和模型试验的监测数据可知,后排桩桩身滑坡推力的计算值与试验值的误差为7%,前排桩的误差为14.4%。因此,证明了运用该方法计算双排长短组合桩的滑坡推力是可行的。Double row long-short piles are new type of pile foundations, which can make up for the deficiency of common double-row piles and shows a good potential of engineering application. It is important to study the calculation method of landslide thrust. Based on the model of Winkler elastic foundation beam, considering the deformation coordination between the loading segment and anchoring segment and limit equilibrium condition, calculation method of the landslide thrust of the flexible pile is derived. Distribution form of landslide thrust behind the pile is trapezoidal. Comparing the theoretical calculation results and the monitoring data of model test, it is found that the error of the landslide thrust calculation value of rear-row pile is 7% to the experimental results, and the error of fore-row pile is 14.4%. Therefore, it is proved that the calculation method of landslide thrust of the double row long-short piles are feasible.

关 键 词：滑坡 柔性桩 双排长短组合桩 滑坡推力 

分 类 号：TU473.1[建筑科学—结构工程]