厚冲积粘土层深基坑锚索轴力损失计算模型研究  

STUDY ON CALCULATION MODEL OF ANCHOR CABLE IN DEEP FOUNDATION PIT WITH THICK ALLUVIAL CLAY LAYER

作　　者：张锟 李强 李伟 王旌[2] 李海燕[2] 曹正龙 ZHANG Kun;LI Qiang;LI Wei;WANG Jing;LI Hai-yan;CAO Zheng-long(Ji'nan Rail Transit Group Co.,Ltd.,250101,Ji'nan,China;Shandong University,250101,Ji'nan,China;Shandong AirportManagement Group Co.,Ltd.,250101,Ji'nan,China)

机构地区：[1]济南轨道交通集团有限公司,济南250101 [2]山东大学,济南250101 [3]山东省机场管理集团有限公司,济南250101

出　　处：《建筑技术》2023年第17期2144-2147,共4页Architecture Technology

基　　金：山东省住房城乡建设科技计划项目(2019-R1-6,2019-R1-7,2019-K6-1,2020-K4-2,2020-K4-3,2020-Z2-1)。

摘　　要：基于等效应变原理,用松弛模型代替锚索,将被锚固围岩简化为广义Kelvin体,提出了一种同时考虑锚索自身松弛效应及其与围岩之间耦合作用的预应力损失计算新模型,并推导了其本构方程、蠕变方程、松弛方程,从理论上解释了锚索预应力损失与围岩介质变形之间的计算关系。通过反演分析方法对模型计算参数进行了理论推算,求解出了锚索长期预应力损失计算公式,并将其反馈于现场锚索预应力张拉施工。Based on the principle of equivalent strain,the anchor replaced of the relaxation model,and the surrounding rock simplify to be Generalized Kelvin style,one new prestress loss calculation model was proposed,which could take itself relaxation effects and coupling between the anchor and rock into account.And its corresponding constitutive equations,creep equation,relaxation equation were deduced,that could theoretically explain the relationship between the cable prestress loss calculation and surrounding rock deformation.Inversion Analysis Method was used to reckon the model parameters,and a long-term anchor prestressing loss formulas was deduced,which was feedback on anchor Prestressed tensioning construction in the site.

关 键 词：耦合机理 预应力损失 蠕变模型 

分 类 号：TU74[建筑科学—建筑技术科学]