垂直预应力锚索施工技术

CONSTRUCTION TECHNOLOGY OF VERTICAL PRESTRESSED ANCHOR CABLE

近年来,随着建筑高度的不断增加,国内外的高层建筑对地下空间的利用率越来越高,基坑开挖深度也随之越深。深基坑支护形式一般为桩锚体系,该支护体系适用于复杂的地质条件,在经济性和安全性方面都比较适用。但是在场地狭小、锚固角度受限,且基坑受外部环境影响较大时,普通锚索对加强基坑的稳定性作用有限,而采取垂直预应力锚索时,垂直锚索便于狭窄场地施工,增加预应力可以极大增强基坑稳定性,有效控制基坑位移及周边沉降。

In recent years,with the continuous development of building height,the utilization rate of underground space of high-rise buildings at home and abroad is also getting higher and higher,and the excavation of foundation pit is also getting deeper.The support form of deep foundation pit is generally pile-anchor system,which is suitable for complex geological conditions and is more suitable in terms of economy and safety.However,when the site is narrow,the anchoring angle is limited,and the foundation pit is greatly affected by the external environment,the ordinary anchor cable has limited effect on strengthening the stability of the foundation pit.However,when the vertical prestressed anchor cable is adopted,the vertical anchor cable is convenient for the construction of the narrow site,and the addition of prestress can greatly enhance the stability of the foundation pit and effectively control the displacement of the foundation pit and the surrounding settlement.