广州某车站出入口偏压深基坑支护结构监测分析

Monitor Analysis of retaining structures for asymmetrically loaded deep pit of station entrance in Guang Zhou City

广州市五羊邨车站出入口依据地质条件,采用排桩+钢与混凝土支撑的混合支撑方案。车站主体结构已经施工完成,出入口基坑为偏压基坑,且地处繁华地带,为确保基坑安全,布置详细监测方案。通过对数据分析表明:钢支撑对控制深基坑位移有显著作用;冠梁与混凝土支撑有利于基坑整体协调变形;由于已建车站主体结构顶板、底板对新建出入口支护结构具有支撑作用,出入口下部结构变形受到约束,导致基坑最大变形在基坑顶部。

Based on geologic condition,the program of Guangzhou Wuyangcun Station entrance was supported by piles in row combined with concrete-steel.The construction of station＇s main part structure has already finished,its foundation pit is under asymmetrically load and located in prosperous area.So monitor scheme was arranged in detail to make the foundation pit safe.The data analysis indicated that the steel support had remarkable effects on control of the displacement of deep pit,top beam and concrete support was useful to coordinate the entire deformation of deep pit,the deformation of underwork was restrained on account of the sustain of main part structure＇s roof and base slab and the maximum deformation took place in the top of deep pit.