摘要
深基坑开挖导致基坑周围土体的水平位移和竖向位移,可能会致使周边建筑出现裂缝,严重的会导致周边建筑失稳,所以在基坑的施工过程中需要密切关注基坑的变形情况。本文提出一种深基坑变形报警方法,建立基坑变形控制指标体系,基于该指标体系设置报警级别并进行报警。指标体系由基坑的累计变形量、变形速率及变形加速度这三项变形控制关键指标组成,所述累计变形量和变形速率具有对应的第一报警值、第二报警值和第三报警值,所述变形加速度具有对应的第四报警值。该报警方法可以及时准确地评价基坑的安全状态,提高基坑施工的安全度。
The excavation of deep foundation pit results in the horizontal displacement and vertical displacement of soil around the foundation pit, which may lead to the cracks in the surrounding buildings and lead to the instability of the surrounding buildings. Therefore, it is necessary to pay close attention to the construction of the foundation pit deformation. In this paper, a method of deep foundation pit deformation alarm was put forward, and a control index system of foundation pit deformation is established. Based on the indicator system, the alarm level was set and an alarm was given. The index system consists of the three key indicators of cumulative deformation, deformation rate and deformation acceleration of the foundation pit. The cumulative deformation and deformation rate have corresponding first, second and third alarm values, the deformation acceleration has a corresponding fourth alarm. The alarm method can timely and accurately evaluate the safety status of the foundation pit and improve the safety of foundation pit construction.
作者
顾琴
张荣宽
GU Qin ,ZHANG Rongkuan(Hehai University,Nanjing Jiangsu 21000)
出处
《河南科技》
2018年第2期111-113,共3页
Henan Science and Technology
关键词
基坑变形
指标
报警
pit deformation；indicator；alarm
