锚桩支护条件下深基坑蠕变变形的时空效应分析

深基坑在开挖及支护完成后,由于土体的蠕变特性,变形依然呈少量增加,变形的时空效应在锚桩支护条件下的深基坑工程的实践中表现明显.监测资料数据显示,作为研究对象的基坑边坡中部变形最大,通过非线性回归分析,预测其稳定临界值,得出变形值随着时间仍有一定的增长,表明基坑在开挖结束后的蠕变变形不容忽视.而分段施工及分部位加固支护是时空效应现象在深基坑实际工程中应用的有效措施.

Analysis of Time-space Effects of Creep Deformation of Deep Foundation Pit under Pile-anchor Supporting

After the excavation and supporting of deep foundation pit ,due to the creep properties of the soil ,deformation still slightly increases .The time-space effects of the deformation are especially obvious un-der the pile-anchor supporting of deep foundation pit engineering practice .Internal monitoring data analysis of the deformation of foundation pit slope shows that the deformation of the middle part reaches the maxi-mum level .Then ,through non-linear regression analysis combined with the monitoring data comparison ,the paper is going to predict the stability threshold .It is concluded that the deformation value increases with the time passing ,so the creep deformation of deep foundation pit after the excavation should not be ignored .The time-space theory is effectively carried out through section construction and partial reinforced supporting in actual construction .