首页|软土地基预制桩沉桩对邻桩的扰动研究

软土地基预制桩沉桩对邻桩的扰动研究

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预制桩作为挤土桩,在沉桩过程中会产生严重的挤土效应,挤压邻桩产生桩身上抬、断桩和桩位偏移等危害.基于此,文中对软土地基预制桩沉桩扰动邻桩进行研究,采用数值模拟的方法对后沉入桩沉桩的过程进行模拟,得到沉桩过程中邻桩桩身变形及弯矩变化,并分析了桩间距和后沉入桩桩径对邻桩桩身变形和弯矩的影响.研究结果表明,当沉桩深度约 6m时,邻桩弯矩达到最大值,当后沉桩沉桩深度为邻桩桩长时,邻桩桩身变形达到最大值;随着桩间距增加,邻桩桩身变形和弯矩逐渐减小,随着后沉入桩桩径增加,邻桩桩身变形和弯矩逐渐增加.
Study on Disturbance of Adjacent Pile Caused by Precast Pile Sinking in Soft Soil Foundation
As extruding pile,precast pile will produce serious extruding effect in the process of pile sinking.The extrusion of adjacent piles causes pile body lifting,pile breaking and pile position deviation.Based on this,the disturbance of adjacent pile by precast pile sinking on soft soil foundation is studied.The numerical simulation method is used to simulate the process of sinking pile after sinking.The deformation and bending moment of adjacent piles are obtained in the process of pile sinking,and the influence of pile spacing and pile diameter on the deform-ation and bending moment of adjacent piles is analyzed.The results show that:when the pile depth is about 6m,the bending moment of the ad-jacent pile reaches the maximum value;when the pile depth of the post-sunk pile is the length of the adjacent pile,the deformation of the ad-jacent pile reaches the maximum value.With the increase of pile spacing,the deformation and bending moment of adjacent piles decrease grad-ually,and with the increase of pile diameter,the deformation and bending moment of adjacent piles increase gradually.

Precast pileNumerical modelingSqueezing effectAdjacent pile

张军菲、杨思凡、郑昆鹏

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中建三局集团有限公司工程总承包公司,湖北 武汉 430070

武汉工程大学土木工程与建筑学院,湖北 武汉 430074

预制桩 数值模拟 挤土效应 邻桩

2024

江西建材
江西省建材科研设计院

江西建材

影响因子:2.247
ISSN:1006-2890
年,卷(期):2024.(9)