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祁润平

（中化学建设投资集团有限公司，北京 102300）

摘 要：为确保复杂地质条件下的基坑安全施工，结合基坑勘察成果开展其支护措施设计，通过变形预测等手段评价支护措施的变形控制效果。以某地质条件复杂的工程为例进行分析，结果表明：对基坑支护进行分区设计，即Ⅰ区段支护措施设计为“锚索+双排支护桩”，Ⅱ区段支护措施设计为“土钉墙+放坡”，Ⅲ区段支护措施设计为“锚索+单排支护桩”，并经配筋计算、稳定性计算，支护措施均满足要求；在基坑变形控制效果评价结果中，现阶段的变形值为12.93~28.1 mm，后续预测阶段的变形值为24.94~28.52 mm，均在变形控制范围内，说明基坑支护措施是合理有效的。

关键词：基坑；支护设计；地质条件；变形预测

中图分类号：TU47                     

文献标志码：A                

文章编号：1005-8249（2024）02-0092-06

DOI：10.19860/j.cnki.issn1005-8249.2024.02.017

 

QI Runping

（China National Chemical Construction Investment Group Co., Ltd., Beijing 102300 ,China）

Abstract: To ensure the safe construction of foundation pits under complex geological conditions, the design of support measures is carried out based on the results of foundation pit survey, and the deformation control effect of support measures is evaluated through deformation prediction and other means. Take a project with complex geological conditions as an example to analyze.The results show that the partition design of foundation pit support should be carried out, that is, the support measures in section I are designed as "anchor cables+double row support piles", the support measures in section II are designed as "soil nail walls+sloping", and the support measures in section III are designed as "anchor cables+single row support piles". After reinforcement calculation and stability calculation, the support measures all meet the requirements; In the evaluation results of the deformation control effect of the foundation pit, the current deformation value ranges from 12.93 to 28.41mm, and the subsequent predicted deformation value is 24.94 to 28.52 mm, all within the deformation control range, indicating that the foundation pit support measures are reasonable and effective.

Keywords: foundation pit; support design; geological conditions; deformation prediction

 

 

作者简介：祁润平(1973—)，硕士，高级工程师，主要研究方向：岩土工程的设计与施工管理。

收稿时间：2023-10-23