利用原有支护体系的基坑加深支护设计研究

Analysis of the Expanding Design of Deep Excavations Based on Original Retaining Structure

结合工程实例,在施工场地小、位移控制要求高、基坑平面形状复杂等众多苛刻条件下,运用一系列措施在围护结构已施工的基础上实现既有基坑加深。对支护体系采用不同计算模型进行模拟比较,通过对计算结果与实测数据的对比,分析不同模型的优缺点,为今后解决类似复杂深基坑支护设计问题提供参考。

Combined with engineering examples,a series of measures are used to deepen the existing foundation pit on the basis of the construction of the enclosure structure under the harsh conditions of small construction site,high displacement control requirements,complex plane shape of the foundation pit,and so on.By comparing the calculation results with the measured data,the advantages and disadvantages of different models are analyzed,which can provide reference for solving similar complex deep foundation pit support design problems in the future.