基于层间接触板底脱空压浆处治力学行为分析

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英文篇名：Analysis of mechanical behavior of void under slab grouting treatment based on interlayer contact 作者：童申家 ; 何坤 ; 王乾 ; 苟强 英文作者：TONG shen-jia;HE Kun;WANG Qian;GOU Qiang;School of Civil Engineering,Xi'an University of Architecture and Technology; 关键词：层间接触 ; 压浆处治 ; 处治尺寸 ; 处治厚度 ; 压浆模量 英文关键词：interlayer contact;;void beneath slab;;treatment radius;;treatment thickness;;grouting modulus 中文刊名：GXKZ 英文刊名：Journal of Guangxi University(Natural Science Edition) 机构：西安建筑科技大学土木工程学院; 出版日期：2019-02-25 出版单位：广西大学学报(自然科学版) 年：2019 期：v.44;No.167 基金：国家自然科学基金青年科学基金项目(51408480);; 陕西省自然科学基础研究计划面上项目(2017JM5026);; 陕西省教育厅专项科研计划项目(16JK1424) 语种：中文; 页：GXKZ201901024 页数：9 CN：01 ISSN：45-1071/N 分类号：203-211

摘要

为了分析压浆处治时考虑层间接触状态的板底脱空力学行为,建立了ANSYS三维有限元模型,分析了不同层间接触状态下的处治尺寸、处治厚度和压浆模量对水泥面板挠度和等效应力的影响。结果表明:挠度与弯拉应力随层间接触状态的增强呈下降趋势,尤其是处治尺寸在400～600 mm区间内,接触状态对水泥面板性能的影响较大。层间接触状态由光滑到连续可分为三阶段:接触系数在0. 0～1. 0为优化阶段,接触系数在1. 0～4. 0为发展阶段,接触系数在4. 0～6. 0为次优化阶段。压浆模量的增大与层间接触状态的增强都有利与提高水泥面板的结构性能。在实际施工中,应选择压浆模量不小于500 MPa且粘结度较好的压浆材料进行灌注。
        In order to analyze the mechanical behavior of the bottom of the board when considering the contact state between layers during grouting treatment,an threedimensional finite element model was established in ANSYS to analyze the effect of treatment dimension,treatment thickness and grouting modulus on the deflection and equivalent stress of the cement panel under different contact conditions between layers.The results show that the deflection and the bending stress increase with the increase of the contact state between the layers,especially in the range of 400 ～ 600 mm,the contact state has a great influence on the performance of the cement panel. The contact state between layerscan be divided into three stages from smooth to continuous: 0. 0 ～ 1. 0 is the optimization stage,1. 0 ～ 4. 0 is the development stage,and 4. 0 ～ 6. 0 is the suboptimal stage. The increase of grouting modulus and the enhancement of the contact state between the layers are beneficial to improve the structural performance of the cement panel. In actual construction,grouting materials with a grouting modulus of not less than 500 MPa and good adhesion should be selected for infusion.

引文

[1]吕韬,梁莉,刘祥友,等.层间接触状况对水泥混凝土路面的影响[J].地下空间与工程学报,2011,7(3):547-551.
    [2]王乾,李海滨,童申家.路面板脱空弯沉差判定与自补偿压浆材料处治[J].广西大学学报(自然科学版),2013,38(1):75-79.
    [3]童申家,王晓强,王乾.重复加载对不同龄期压浆材料使用寿命影响研究[J].硅酸盐通报,2017,36(12):4262-4270.
    [4] AMEEN M,RAGHU B K,GOPALAKRISHNAN A R. Modeling of concrete cracking-ahybrid technique of using displacement discontinuity element method and direct boundary element method[J]. Engineering Fracture Mechanics,2012,35(9):1054-1059.
    [5] OOI E T,SONG C,LOI F T,et al. Automatic modeling of cohesive crack propagation in concrete using polygon scaled boundary finite elements[J]. Engineering Fracture Mechanics,2012,93(10):13-33.
    [6]肖益民,丁伯承.水泥混凝土路面与基层接触状况的研究[J].公路,2000,16(9):32-34.
    [7]童申家,叶丛,王乾.板底脱空水泥路面疲劳寿命预估方程研究[J].广西大学学报(自然科学版),2018,43(1):304-313.
    [8]刘福明,陈万里.压浆技术在处理水泥路面唧泥及板底脱空问题上的应用研究[J].筑路机械与施工机械化,2017(1):43-46.
    [9] WADKAR A,CLEARY D,GUO E. Load-transfer efficiencies of rigid airfield pavement joints based on stresses and deflections[J]. Journal of Materials in Civil Engineering,2011,23(8):1171-1179.
    [10]中华人民共和国交通运输部.公路水泥混凝土路面设计规范:JTG D40-2015[S].北京:人民交通出版社,62-64.
    [11]刘竹君.板底脱空对水泥混凝土路面接缝传荷及疲劳开裂损伤的影响[D].成都:西南交通大学,2015.
    [12]余四新.连续配筋水泥混凝土路面早期行为观测分析[J].中外公路,2016,36(3):68-71.
    [13]吴琳洁.板底脱空层间作用下水泥路面疲劳寿命研究[D].西安:西安建筑科技大学,2017.
    [14]王乾,刘锦涛,王选仓.路面板底脱空唧泥判定与自补偿压浆材料处治[J].长安大学学报(自然科学版),2013,33(1):28-32.
    [15]张艳聪,刘少文,申俊敏等.层间脱空时水泥混凝土路面的荷载应力特征[J].公路工程,2015,40(3):25-36.
    [16]张艳聪,高玲玲,沈俊敏.水泥混凝土路面层间剪切刚度试验研究[J].公路,2015,21(9):10-13.
    [17]王芳,王选仓,王乾.自补偿式水泥路面板底脱空处治技术[J].广西大学学报(自然科学版),2010,35(1):68-72.