| 水泥土桩复合土钉水平位移简化计算 |
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| 引用本文： | 秦会来,郭院成.水泥土桩复合土钉水平位移简化计算[J].岩土力学,2007,28(9):1923-1926. |
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| 作者姓名： | 秦会来 郭院成 |
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| 作者单位： | 1. 同济大学,地下建筑与工程系,上海,200092
2. 郑州大学,土木工程学院,郑州,450002 |
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| 摘 要： | 在他人研究的基础上,将支护体系受力计算的增量方法应用到水泥土桩复合土钉支护体系中。根据土体开挖卸载效应和土钉拉力的形成机制提出了土钉力增量比例系数的确定方法,实现了水泥土桩复合土钉支护体系中土钉力的增量计算方法,从而有效地反映了施工过程对土钉受力的影响,使得土钉的受力计算更符合实际。通过简化,根据支护体系中水泥土桩和土钉之间的变形协调关系、土钉的受力变形相关关系以及水泥土桩的受力变形相关关系,提出了水泥土桩复合土钉支护体系基于增量方法的水平位移计算模式。最后,结合工程实例,将该方法的计算结果与实测结果进行了对比,结果显示该方法是可行和有效的。
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| 关 键 词： | 复合土钉 水泥土桩 增量法 变形计算 |
| 文章编号： | 1000-7598-（2007）09-1923-04 |
| 收稿时间： | 2005-10-24 |
| 修稿时间： | 2005-10-24 |
Simplified calculation method of horizontal displacements for the composite retaining system of cement-soil piles and soil nailing |
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| QIN Hui-lai,GUO Yuan-cheng.Simplified calculation method of horizontal displacements for the composite retaining system of cement-soil piles and soil nailing[J].Rock and Soil Mechanics,2007,28(9):1923-1926. |
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| Authors: | QIN Hui-lai GUO Yuan-cheng |
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| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. School of Civil Engineering, Zhengzhou University, Zhengzhou 450002, China |
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| Abstract: | Based on the previous studies of others,the incremental calculation method is applied to the composite retaining system of cement-soil piles and soil nailing(CRSCSPSN).According to the unloading effect of excavation and the forming mechanism of soil-nail forces,the establishment method for the proportional coefficients of soil-nail forces is presented and the method makes it possible to calculate the soil-nail forces by increments.The incremental calculation method can effectively explain the influence of construction on soil-nail forces;and the calculation results of this method are more consistent with those of the measured.According to the deformation compatibility between the cement-soil piles and soil nails,and the relations between force and deformation both for soil nails and cement-soil piles,the simplified deformation calculation method for CRSCSPSN is presented.The deformation calculation method proposed is also based on the incremental theory.At last,there is an engineering case of which the calculated horizontal-displacement results and measured results are compared;and the comparison conclusions show that the simplified calculation method of horizontal displacements for CRSCSPSN is acceptable and effective. |
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| Keywords: | composite soil nailing cement-soil piles incremental method deformation calculation |
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