变截面桩水平承载规律研究

发布时间：2018-04-10 19:46

本文选题：变截面桩 + 水平承载　；参考：《科学技术与工程》2016年33期

【摘要】：基于变截面桩水平承载计算理论,考虑不同异化深度、有效截面面积等因素,对变截面空心方桩、变截面管桩和变截面加翼管桩这3种类型变截面桩在淤泥质土中的承载性状进行了规律性研究,结果表明:变截面桩桩顶位移均随异化深度的增大而非线性减小,减小速率先增大后趋缓;桩身最大弯矩随异化深度的增大均呈先减小后增大的趋势,当异化深度为(3~4)d时桩身最大弯矩值最小;变截面桩的水平承载力均随异化深度增大而非线性增大,异化深度小于7d时变截面加翼管桩的承载力较其他2种变截面桩有明显优势,异化深度大于7d后则开始情况相反;异化深度相同时,变截面空心方桩承载力较变截面管桩有优势。综合考虑承载力及桩身弯矩随异化深度的变化后,建议变截面桩异化深度(3~4)d为宜。
[Abstract]:Based on the calculation theory of horizontal bearing capacity of variable cross-section piles, considering the different alienation depth, effective cross-section area and other factors, the hollow square piles with variable cross-section are studied.The load-bearing behavior of three types of variable-cross-section piles with variable cross-section and variable cross-section with wing pipe pile in silt soil is studied regularly. The results show that the displacement of the top of the pile with variable cross-section decreases with the increase of the dissimilation depth, and the displacement of the pile with variable cross-section decreases linearly with the increase of the depth of dissimilation.The maximum bending moment of pile body decreases first and then increases with the increase of alienation depth, and the maximum bending moment of pile body is the smallest when the alienation depth is 3 ~ 3 ~ 4? d.The horizontal bearing capacity of the pile with variable cross section increases non-linear with the increase of the alienation depth. The bearing capacity of the pile with wing pipe with variable cross section is obviously superior to that of the other two kinds of pile with variable cross section, but when the depth of alienation is greater than 7 days, the situation begins to reverse.When the alienation depth is the same, the bearing capacity of variable section hollow square pile is superior to that of variable section pipe pile.Considering the variation of bearing capacity and bending moment of pile with dissimilation depth, it is suggested that the dissimilation depth of pile with variable cross-section should be 3 ~ 4d.
【作者单位】：海南大学土木建筑工程学院;中建三局集团有限公司;
【基金】：海南省自然科学基金(513144) 海南省科协青年科技英才创新计划项目(201506) 海南大学土木工程研究生创新中心项目资助
【分类号】：TU473.1

【相似文献】