曾家培 ZENG Jia-pei

（广州市城市规划勘测设计研究院，广州 510060；广东省城市感知与监测预警企业重点实验室，广州 510060）

（Guangzhou Urban Planning & Design Survey Research Institute，Guangzhou 510060，China；

Guangdong Enterprise Key Laboratory for Urban Sensing，Monitoring and Early Warning，Guangzhou 510060，China）

摘要：依托珠三角地区某住宅楼和商业配套工程，分析了深厚软土基坑的支护设计与优化过程，采用瑞典条分法和强度折减法分别验算了基坑的整体稳定性，并介绍了复合土钉支护结构在深厚软土基坑中的应用效果。结果表明，深厚软土场地中对基坑支护设计方案进行充分对比分析是必要的；采用的复合土钉支护结构安全可靠、经济合理，在紧邻既有建筑物的情况下取得了良好的应用效果，可为类似工程提供一定参考。

Abstract: Based on a residential building and commercial supporting project in the Pearl River Delta region, the support design and optimization process of deep soft soil foundation pits were analyzed. The overall stability of the foundation pit was verified using the Swedish slice method and strength reduction method, respectively. The application effect of composite soil nail support structure in deep soft soil foundation pits was introduced. The results indicate that it is necessary to fully compare and analyze the design schemes of foundation pit support in deep soft soil sites. The composite soil nail support structure is safe, reliable, and economically reasonable, and has achieved good application results in close proximity to existing buildings, providing a certain reference for similar projects.

关键词：复合土钉支护结构；深基坑；软土；整体稳定性；优化设计

Key words: composite soil nail support structure；deep foundation pit；soft soil；overall stability；optimization design