| 考虑侧填荷载的分离式基础涵洞地基承载力新算法和试验 |
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| 引用本文： | 王雯璐,赵大军,王磊.考虑侧填荷载的分离式基础涵洞地基承载力新算法和试验[J].吉林大学学报(地球科学版),2011,41(3):771-776,783. |
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| 作者姓名： | 王雯璐 赵大军 王磊 |
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| 作者单位： | 吉林大学建设工程学院,长春,130026;吉林大学建设工程学院,长春,130026;吉林大学建设工程学院,长春,130026 |
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| 基金项目： | 国家“973”计划项目(2010CB731503) |
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| 摘 要： | 为了研究涵侧填土对采用分离式基础涵洞地基承载力的提高效应,先结合基底土体的受力特点,进行受力分析,建立计算模型,构建求解分离式基础地基极限承载力的算法,给出承载力表达式。然后在相似理论的指导下,设计了5组模型,试验模拟粉质黏土地基受荷变形直到破坏的全过程,绘出荷载-沉降曲线,测得涵侧填土高度为0、4、8、12、16 m时的地基极限承载力。试验发现:随着侧填土高度的增加,承载力显著提高,当填土为12 m时已达到885 kPa;但提高幅度表现出非线性特性,先从18.42%增加到36.11%,然后减小到3.39%;当填土达到16 m时承载力达到915 kPa且不再增加;同时发现使用本文算法与试验实测值的误差小于10%,可以考虑用此算法计算分离式基础涵洞的地基极限承载力。继而得出结论:当涵洞地基沉降满足设计要求时,涵侧填土显著提高了地基承载力,节约工程造价,且提高的幅度先增加后减少,当达到16 m时地基承载力便逐渐趋于915 kPa。
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| 关 键 词： | 侧向填土荷载 分离式基础 地基承载力 模型试验 临界值 |
Algorithm and Experimental of the Separated Foundation Bearing Capacity of Culverts Considering Lateral Fill |
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| WANG Wen-lu,ZHAO Da-jun,WANG Lei.Algorithm and Experimental of the Separated Foundation Bearing Capacity of Culverts Considering Lateral Fill[J].Journal of Jilin Unviersity:Earth Science Edition,2011,41(3):771-776,783. |
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| Authors: | WANG Wen-lu ZHAO Da-jun WANG Lei |
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| Institution: | WANG Wen-lu,ZHAO Da-jun,WANG Lei College of Construction Engineering,Jilin University,Changchun 130026,China |
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| Abstract: | Combining with the stress characteristics of the foundation soil,the soil force was analyzed for finding the improved effect on the separated foundation bearing capacity of lateral fill.Establishing the calculation model and algorithm,the general formulation of separated foundation bearing capacity considering lateral fill was deduced.Then under direction of similarity theory,five model tests were designed to simulate the foundation deformation of silty clay in whole loading process.The pressure-settlement ... |
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| Keywords: | lateral fill separated foundation foundation bearing capacity model test critical point |
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