响应面法分析盐沼区基桩承载力影响因素  

Analysis of affecting factors for bearing capacity of foundation pile in salt marsh area based on response surface methodology

作　　者：邓友生 张克钦 冯忠居[2] 张文 王正振 肇慧玲 DENG You-sheng;ZHANG Ke-qin;FENG Zhong-ju;ZHANG Wen;WANG Zheng-zhen;ZHAO Hui-ling(Plie-supported Structures Research&Test Center,Xi’an University of Science and Technology 710054,China;School of Highway,Chang’an University,Xi’an 710064,China;School of Civil Engineering,Qinghai University,Xining 810016,China;School of Civil Engineering,Lanzhou Univ.of Tech.,730050,China)

机构地区：[1]西安科技大学桩承结构研究中心,陕西西安710054 [2]长安大学公路学院,陕西西安710064 [3]青海大学土木工程学院,青海西宁810016 [4]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2024年第2期118-123,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51878554);青海省公路交通科技攻关项目(2014-07)。

摘　　要：依托青海省德香高速公路盐沼泽区域桥梁桩基工程,探究盐沼泽区基桩受不同腐蚀损伤对承载力的影响.通过响应面法建立桩长、桩径、腐蚀深度及剥落厚度对基桩竖向与水平承载力影响的响应模型,通过响应曲面图对两因素交互作用进行分析.结果表明:响应面法建立的受腐蚀基桩承载力模型精确度较高;竖向承载力随桩长与桩径的增大、腐蚀深度与剥落厚度的减小而增加,水平承载力随桩径的增大与剥落厚度的减小而增加,随桩长的增大先减小后增加;桩长较小时腐蚀深度对承载力的影响较小,剥落厚度的影响远大于腐蚀深度,工程中应重点关注水平腐蚀损伤的防护.Relying on the bridge pile foundation project in the salt marsh area of the De Xiang Expressway in Qinghai Province.To investigate the influence of different corrosion damages on the bearing capacity of foundation pile in salt marshes,a response model of the vertical and horizontal bearing capacity of foundation pile was established using the response surface method,considering factors such as pile length,pile diameter,corrosion depth,and spalling thickness.The interaction between two factors was analyzed using response surface plots.The results show that the accuracy of the corrosion-damaged foundation pile bearing capacity model established by the response surface method is relatively high.The vertical bearing capacity increases with the increase of pile length and pile diameter,and the decrease of corrosion depth and spalling thickness.The horizontal bearing capacity increases with the increase of pile diameter and the decrease of spalling thickness,but first decreases and then increases with the increase of pile length.When the pile length is relatively small,the influence of corrosion depth on bearing capacity is relatively small,while the influence of spalling thickness is much greater.Therefore,attention should be paid to the protection against horizontal corrosion damages in engineering practice.

关 键 词：响应面法 基桩 承载力 盐沼区 腐蚀 

分 类 号：TU473[建筑科学—结构工程]