考虑地质影响的深基坑复合土钉墙最优支护参数选择技术
Selection of Optimal Supporting Parameters of Composite Soil Nailing Wall for Deep Foundation Pit Considering Geological Influence
任睿祺 1张旭辉 1李振杰 1陈世盛 1王建磐1
作者信息
- 1. 山西冶金岩土工程勘察有限公司, 山西 太原 030002
- 折叠
摘要
通过勘察一区域综合办公写字楼主楼获取土层详细指标,利用土钉抗力参数计算选取最佳土钉墙材料,并设计深基坑复合土钉墙支护方案与施工流程.将设计好的施工方案输入到FLAC3D软件中模拟深基坑支护结构,模拟不同地质影响下的侧压力系数.经试验验证:当土钉参数为 5 排、钢管嵌固深度参数为 2m时,支护结构可以最大程度降低深基坑的水平位移与沉降;在侧压力系数较大情况下,可以保持较低的竖直位移与深基坑坑底隆起值,具有较好的支护效果.
Abstract
By surveying the main building of a comprehensive office building in a certain area to obtain detailed soil layer indicators,using soil nail resistance parameters to calculate and select the optimal soil nail wall material,and designing a deep foundation pit composite soil nail wall support scheme and construction process.Input the designed construction plan into FLAC3D software to simulate the deep foundation pit support structure and the lateral pressure coefficient under different geological influences.Experimental verification:When the soil nail parameters are 5 rows and the steel pipe embedding depth parameter is 2 meters,the support structure can minimize the horizontal displacement and settlement of the deep foundation pit to the greatest extent;When the lateral pressure coefficient is large,it can maintain a lower vertical displacement and deep foundation pit bottom uplift value,which has a good support effect.
关键词
地质影响/深基坑/复合土钉墙/支护参数/水平位移/侧压力系数Key words
geological influence/deep foundation pit/composite soil nailing wall/supporting parameters/horizontal displacement/lateral pressure coefficient引用本文复制引用
基金项目
山西省煤基重点科技攻关项目(MJ2021-08)
出版年
2024
NETL
NSTL
万方数据