土钉桩锚组合支护结构变形的数值分析研究
摘要:土钉桩锚组合支护结构型式是近年来适用于城市密集空间的基坑边坡支护工程。土钉桩锚组合支护结构型式随基坑的开挖及稳定后的变形规律尚需探讨研究,对于该组合支护体系下的支护结构及基坑变形的研究离不开具体的基坑工程案例。针对参与的北京市平谷区一万德福广场B43项目的土钉桩锚组合支护结构型式下的基坑工程,采用有限差分软件FLAC(3D)对该基坑的1—1剖面进行模拟分析。通过FLAC(3D)模拟分析的结果与实测的基坑测斜仪监测的深层水平位移相比较,分析得出:土钉-桩锚组合支护结构型式下,桩锚部分比上部土钉墙位移要大,桩锚部分的位移明显随着开挖的进行增大,且对桩本身而言桩的位移呈现中后段位移较大,两端位移较小的形状分布,开挖上部土钉墙部分,会发生基坑隆起现象。数值模拟的土钉桩锚支护结构型式下基坑变形与实测的支护结构变形结果相吻合。
Abstract:In recent years soil nails and pile-anchors has been adapted to pit slope engineering of urban agglomeration space. The research of deformation of soil nails and pile-anchors with excavating and stable still needs to discussing about. It is inseparable from a pit projects, which researching the regularity of deformation about supporting structure and foundation of soil nails and pile-anchors. Analyzing 1-1 section of the B43 pit project-Wandefu square for Pinggu with participated by FLAC3D finite difference software. By compared with the actual measurement, FLAC3D simulation can conclude some conclusion, such as the displacement of pile anchor block more than soil nails, the displacement of pile anchor increasing with excavated and the after paragraph displacement larger, while two ends displacement smaller for the pile presents itself. Additional the foundation pit can be uplift with excavating. By compared with data of actual measurement, the results by FLAC3D is coincide.
中文标题：
土钉桩锚组合支护结构变形的数值分析研究
Numerical Analysis of Deformation on Combined Retaining System of Soil Nails and Pile-Anchors
作者：
张凯1,张钦喜2,张启兵1
Zhang Kai1,Zhang Qinxi2,Zhang Qibing1
作者简介:张凯,男,1987年生,汉族,安徽人,毕业于北京工业大学,硕士,主要从事地基处理及基坑工程方面的研究。E-mail:kaizhang073@163.com
通讯地址：
1. 北京城建勘测设计研究院有限责任公司, 北京 100101; 2. 北京工业大学建筑工程学院, 北京 100124
1.BeijingUrbanConstruction&SurveyingDesignInstituteCo.,Ltd,Beijing100101,China; 2.CollegeofArchitectureandCivilEngineering,BeijingUniversityofTechnology,Beijing100124,China
中图分类号:TU47
doi:10.3969/j.issn.1007-2993.2016.04.005
出版物：岩土工程技术
收稿日期:2016-04-28
关键词:土钉桩锚支护,变形,FLAC(3D),监测
Key words:soil nails and pile-anchors,formation,FLAC3D,monitoring
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