武汉软土深基坑钢管斜支撑抢险加固设计案例  

A Case Study of Emergency Reinforcement Design Using Steel Rakers for A Deep Excavation Support in Wuhan Soft Soils

作　　者：胡科 韩帅 太俊 张劼 赵晨曦 HU Ke;HAN Shuai;TAI Jun;ZHANG Jie;ZHAO Chenxi(Central&Southern China Municipal Engineering Design and Research Institute Co.Ltd.,Wuhan 430015)

机构地区：[1]中国市政工程中南设计研究总院有限公司,武汉430015

出　　处：《土工基础》2024年第5期770-774,共5页Soil Engineering and Foundation

摘　　要：分析在武汉地区长江一级阶地软土深基坑工程中出现的突发桩体位移过大情况,提供抢险加固案例,说明了在基坑工程施工过程中按照设计工况实施的重要性。当出现险情后,需要对原支护体系的变形受力特性及监测数据进行研判,推测支护结构出险原因,分析支护结构受力变形后桩身情况,并结合现场条件制定切实可行的加固处理措施。通过这些措施及时遏制了险情的进一步恶化,全过程的监测数据分析充分验证了抢险方案的合理性和有效性。该案例充分证明了按照设计工况实施的必要性,对改进基坑工程的施工管理具有重要意义,可为今后防止类似险情的发生提供参考。This paper presents a case history of analyzing a sudden excessive deformation of the soldier piles of a deep excavation support project within the first terrace of Yangtze River in Wuhan.Throughout an emergency reinforcement project,the importance of implementing the design conditions during the deep excavation supporting system construction is demonstrated in the paper.When the excessive deformation occurred,it is necessary to analysis the deformation and stress characteristics in the original support system as well as the monitoring data.It is also important to find out the reasons that resulting in the support structure failure,to analyze the condition of the soldier piles after the support structure undergone the stress deformation,and to develop feasible reinforcement measures based on site conditions.These timely measures prevented further deterioration of the failure,and the full-process monitoring data analysis fully validated the rationality and the effectiveness of the emergency remediation plan.This case study fully demonstrates the necessity of the implementing of design conditions and has important significance for improving the construction management of deep excavation projects.It also provides a reference for preventing similar accidents in the future.

关 键 词：软土 基坑 斜支撑 抢险 数值分析 

分 类 号：TU473[建筑科学—结构工程]