摘要
为了探究复杂地质条件下基坑支护优化后对基坑整体的影响,结合经济成本和施工工期等因素,将部分基坑支护结构中SMW工法桩优化为拉森钢板桩。通过电子水平仪和测斜仪对基坑的水平位移和地表沉降量进行监测,结果表明:在复杂地质条件下,基坑支护的优化可以大量节省施工时间以及工程成本,基坑支护优化后的基坑监测结果均满足设计要求,达到较为理想的效果。基坑支护优化后的沉降量改变不是很大,地表沉降量和地表沉降平均速率略有增加,但是单月沉降量最大值有所减小;基坑支护优化对于基坑整体的水平位移影响较大,增加了水平位移的总量以及单日水平位移速率。基坑支护形式改变对于钢支撑的轴力变化影响较大,但依旧处于安全范围内。
In order to explore the influence of optimized foundation pit supporting on the whole foundation pit under complex geological conditions,SMW piles in some foundation pit supporting structures were optimized as Larsen steel sheet piles in combination with economic cost and construction period.Through electronic level and inclinometer for foundation pit horizontal displacement and the surface subsidence monitoring,the results show that under the complex geological conditions,the optimization of foundation pit supporting can save construction time and a lot of engineering cost,foundation pit supporting the optimized foundation pit monitoring results meet the design requirements,to achieve the ideal effect.After optimization of foundation pit support,the settlement amount does not change very much,the surface settlement amount and the average rate of surface settlement increase slightly,but the maximum monthly settlement amount decreases.Foundation pit support optimization has a great influence on the overall horizontal displacement of the foundation pit,increasing the total horizontal displacement and the single-day horizontal displacement rate.The change of bracing form of foundation pit has great influence on the change of axial force of steel bracing,but it is still in the safe range.
作者
刘杰
张昌明
吕志国
张彦栋
Jie Liu;Changming Zhang;Zhiguo Lv;Yandong Zhang(Rail Transit Company of Sixth Bureau of China State Construction Engineering Corporation,Tianjin 300451,China)
出处
《青海交通科技》
2021年第4期67-71,77,共6页
Qinghai Transportation Science and Technology
关键词
基坑支护
基坑监测
水平位移
沉降量
foundation pit support
Foundation pit monitoring
horizontal displacement
settlement
作者简介
刘杰(1995-),男,硕士,主要研究方面:地铁、高铁研究。
