复合土钉支护基坑的力学研究

复合土钉支护基坑的力学研究
摘要:为讨论复合土钉墙支护基坑在实际工程中的受力机理,借助基于离散元法的颗粒流软件PFC2D,引入颗粒流理论和开发颗粒流细观数值模拟技术,从细观角度对复合土钉支护的力学机理进行研究。通过离散元方法建立复合土钉颗粒流模型,并与纯土钉支护和纯搅拌桩支护的受力进行对比,发现复合土钉支护时土钉轴力的分布形式和大小与纯土钉支护有很大不同,且桩墙所受的弯矩和剪力分布也异于纯搅拌桩支护。研究表明利用离散元法进行力学分析,能为复合土钉墙支护基坑的机理研究提供新的思路和方法。

Abstract:In order to discuss the mechanical mechanism of composite soil nailing wall supporting foundation pit in practical projects, it was based on discrete element method of PFC2D, and the introduction of particle flow theory and development of particle flow in mesoscopic numerical simulation technology, to conduct the mechanics studies about its mechanism from mesoscopic aspect for composite soil nailing supporting.The particle flow code model for composite soil nailing supporting was established by discrete element method, which compared with nailing supporting only and cement-soil pile supporting only, there were much difference about axial force and its distribution between composite soil nailing supporting and nailing supporting only.Whats more, the distribution of bending moment and shear stress is different from cement-soil pile supporting only.So, the results show it offers a new approach and method for mechanism study of composite soil nailing wall supporting foundation pit by using discrete element method.

中文标题：
复合土钉支护基坑的力学研究
Mechanics Studies on Composite Soil Nailing for Supporting Foundation Pit

作者：
王涛,熊传祥
Wang Tao,Xiong Chuanxiang
作者简介:王涛,1986年生,男,汉族,福建邵武人,硕士研究生,主要从事边坡工程方面研究工作。E-mail:511967305@qq.com
通讯地址：
福州大学 环境与资源学院, 福建福州 350001
CollegeofEnvironmentandResources,FuzhouUniversity,Fuzhou350001,Fujian,China

中图分类号:TU471.3
doi:10.3969/j.issn.1007-2993.2012.06.007
出版物：岩土工程技术
收稿日期:2012-09-12
网络出版日期:2021-07-06


关键词:复合土钉,基坑,离散元法,力学研究
Key words:composite soil nailing,foundation pit,discrete element method(DEM),mechanics studies
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