Simplified calculation method of horizontal displacements for the composite retaining system of cement-soil piles and soil nailing

QIN Hui-lai; GUO Yuan-cheng

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Simplified calculation method of horizontal displacements for the composite retaining system of cement-soil piles and soil nailing

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- Simplified calculation method of horizontal displacements for the composite retaining system of cement-soil piles and soil nailing
- Vol. 28, Issue 9, (2007)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU472
- Online First：15 October 2013，
  
  Published：2007
- 稿件说明：
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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]. 2007, 28(9).
DOI：

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]. 2007, 28(9). DOI：

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。

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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