基于现场试验与数值模拟的微型桩设计参数优化  

Design parameters optimization of micro-pile based on field test and numerical simulation

作　　者：张力 赵振宇[2] 刘力璇 李超[3] 李鑫[3] 邱树茂 ZHANG Li;ZHAO Zhenyu;LIU Lixuan;LI Chao;LI Xin;QIU Shumao(GuizhouSanDu Expressway Construction Co.,Ltd.,Qiannan Buyi and Miao Autonomous Prefecture Guizhou 558000,China;Guizhou Transportation Planning Survey &Design Academe Co.Ltd.,Guiyang 550081,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]贵州三独高速公路建设有限公司,贵州黔南布依族苗族自治州558000 [2]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081 [3]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2019年第4期52-57,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：贵州省交通运输厅科技项目(2015-121-020)~~

摘　　要：通过分析、模拟和现场试验等方法,对微型桩结构的变形特性、抗滑机理进行分析研究,在现场试验保证模型可行性的前提下,模拟结构自身参数及岩土体参数的变化对结构性能的影响,提出合理的参数优化设计:1)微型桩的桩间距和排间距应为3D^7D;2)微型桩的锚固段长度应取1/3~1/2个桩长;3)合适的注浆技术会改变土体参数,进而影响微型桩的加固作用.本文为微型桩在实际工程中的应用提供了一种较准确、经济的设计方法.In this paper,the anti-sliding mechanism of micro-pile structure and the optimization of important parameters of micro-pile in engineering are studied by means of analysis,simulation and field test.On the premise of the feasibility of the model guaranteed by the test results,and the influence of structural parameters and the change of geotechnical parameters on the structural performance is simulated.The reasonable parameter optimization design is put forward:1)Optimize the pile spacing and row spacing of the micro-pile should be 3D-7D;2)The length of the anchoring section of the micro-pile should take 1/3-1/2micro-pile length;3)Appropriate grouting technology will change soil parameters,and then affect the reinforcement of micro-piles.This paper provides a more accurate and economical design method for the structural design of the actual project.

关 键 词：边坡防护 微型桩 抗滑机理 现场试验 参数优化 

分 类 号：TU473.1[建筑科学—结构工程]