越冬桩锚基坑冻胀变形的数值模拟分析  

NUMERICAL SIMULATION OF FROST HEAVE DEFORMATION OF OVERWINTERING PILE-ANCHORED FOUNDATION PIT

作　　者：孙超[1] 茆欣 陈朋 SUN Chao;MAO Xin;CHEN Peng(School of Surveying and Prospecting Engineering,Jilin Jianzhu University,Changchun 130118,China;Northeast Electric Power Design Institute Co.,Ltd.,China Power Engineering Consulting Group,Changchun 130000,China)

机构地区：[1]吉林建筑大学测绘与勘查工程学院,长春130118 [2]中国电力工程顾问集团东北电力设计院有限公司,长春130000

出　　处：《低温建筑技术》2021年第3期97-101,共5页Low Temperature Architecture Technology

基　　金：吉林省教育厅科学技术研究项目(2014-232)。

摘　　要：为了分析冻胀作用对基坑变形的影响,通过Flac3D软件对桩锚支护的基坑进行数值模拟,模拟越冬。结果表明随着冻胀时间的增加,冻胀作用越明显,对基坑变形及支护结构的影响越大。不同负温条件对基坑影响也不同,温度越低,冻深越大,冻胀变形越严重。因此在实际工程中,存在越冬情况的基坑必须做好监测以及防护。To analyze the effect of frost heave on the deformation of foundation pit,FLAC3D software was used to simulate the foundation pit supported by pile and anchor in the overwintering.The results show that with the increase of time,the frost heave effect is more obvious,and the influence on the deformation of foundation pit and supporting structure is greater.In addition,different negative temperature conditions have different effects on foundation pit.The lower the temperature is,the greater the frost depth is and the more serious the frost heave deformation is.Therefore,the excavation with overwintering condition must be well monitored and protected in practical engineering.

关 键 词：数值模拟 冻胀作用 基坑变形 

分 类 号：TU455[建筑科学—岩土工程]