桩端后注浆抗压桩的数值模拟研究
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摘要
利用有限元软件ABAQUS对桩端后注浆抗压桩进行数值模拟研究,将计算结果与试验实测结果对比,结果表明采用的模型能有效地模拟单桩荷载与沉降的关系;选取注浆量、浆液模量、长径比作为参数变量,利用ABAQUS分析模型中各参数变化对桩端后注浆抗压桩极限承载力的影响,表明注浆量、浆液模量对单桩承载力的影响都有一个限值、桩端后注浆技术对长径比小的桩更有效。
The finite element software ABAQUS is used to numerically simulate the post-grouting pile.The result is compared with the experimental result,showing that the model can effectively simulate the relationship between load and settlement of single pile;Use ABAQUS to calculate the influence of the change of grouting quantity,grouting modulus and length-diameter ratio.The result shows that the influence of grouting quantity and grouting modulus on the bearing capacity of single pile has a limit value and post-grouting technology is more effective for piles with a smaller length-diameter ratio.
The finite element software ABAQUS is used to numerically simulate the post-grouting pile.The result is compared with the experimental result,showing that the model can effectively simulate the relationship between load and settlement of single pile;Use ABAQUS to calculate the influence of the change of grouting quantity,grouting modulus and length-diameter ratio.The result shows that the influence of grouting quantity and grouting modulus on the bearing capacity of single pile has a limit value and post-grouting technology is more effective for piles with a smaller length-diameter ratio.
引文
[1]汪胜忠.大直径超长钻孔灌注桩桩端后注浆承载特性研究[D].杭州:浙江大学,2010.
[2]朱栋文.黏土中桩端后注浆灌注桩承载特性的模型试验和数值模拟研究[D].上海:同济大学,2016.
[3]刘锟,赵春风.不同桩端土承压钻孔灌注桩模型试验研究[J].岩土工程学报,2011,33(3):490-495.
[4]刘福天,赵春风,王学知,等.黏土中成桩工艺对桩承载性状影响试验[J].沈阳建筑大学学报(自然科学版),2010,26(1):1-6.
[2]朱栋文.黏土中桩端后注浆灌注桩承载特性的模型试验和数值模拟研究[D].上海:同济大学,2016.
[3]刘锟,赵春风.不同桩端土承压钻孔灌注桩模型试验研究[J].岩土工程学报,2011,33(3):490-495.
[4]刘福天,赵春风,王学知,等.黏土中成桩工艺对桩承载性状影响试验[J].沈阳建筑大学学报(自然科学版),2010,26(1):1-6.