基坑开挖引起紧邻建筑物沉降的简化计算方法

范凡; 陈锦剑; 章红兵; 王建华

doi:10.11779/CJGE2015S2013

基坑开挖引起紧邻建筑物沉降的简化计算方法 English Version

上海交通大学土木工程系,上海 200240

基金项目: 国家自然科学基金项目（41330633,41172251）; 上海市科; 学技术委员会科研项目（13231200602）

详细信息

作者简介:
范凡(1991- ),男,硕士研究生,主要从事岩土工程方向的研究。

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出版历程
- 收稿日期: 2015-03-25
- 发布日期: 2015-07-24

Simplified method to predict settlements of adjacent buildings due to deep excavation

Shanghai Jiao Tong University, Shanghai 200240, China

摘要

摘要: 提出了一种基坑施工引起紧邻建筑物沉降的简化计算方法,可根据基本工程信息快速推求建构筑物基础沉降。与之前的方法相比,既考虑了基础刚度对沉降的影响,又避免了繁杂的有限元计算。在总结分析地表沉降特征和分布模式的基础上,结合工程经验和数值分析探讨了坑外土体沉降随深度变化规律。根据规律总结出基坑开挖对周边环境影响的分区特征,提出了坑外开挖面深度以上土体沉降分布曲线的简化计算公式。由于建筑物基础刚度远大于周围土体,假设其沉降主要来源于下卧土层变形,即建筑沉降等同于基底埋深处的土体沉降,从而得到了根据土体沉降分布曲线来描述建筑物沉降的简化计算方法。算例分析表明,其计算值与实测值有较好的一致性,可为预测、分析紧邻基坑施工的建筑物沉降提供参考。
- 基坑 /
- 沉降 /
- 简化算法 /
- 分布模式 /
- 经验公式
Abstract: A simplified approach for predicting settlement of the adjacent buildings due to excavation is proposed. The settlement of building foundation can be obtained merely according to the basic information of the excavation. Compared with the previous approaches, this approach considers the foundation stiffness and avoids complex numerical modelling. Based on distribution pattern of ground surface settlement, the reduction rules of deep soil settlement is analyzed, and the settlement distribution curve of deep soils is obtained. According to the partition characteristics of excavation environmental impact, the settlement distribution curve above the excavation face is suggested. Since the stiffness of building foundation and ground stabilization is far greater than that of the surrounding soils, and the settlement of buildings mainly results from soil deformation under the building foundation. Therefore, the settlement of soils under the building foundation can be taken as that of the buildings, which can be represented by the settlement curve of deep soils. The comparison between the monitoring data and the calculated results obtained by the simplified approach is in good agreement, which indicates the simplified approach can be employed to predict the settlement of buildings induced by excavation.
- excavation /
- settlement /
- simplified method /
- empirical formula /
- undefined

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参考文献(7)

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