富水砂层深基坑盖挖逆作施工对周边环境影响
黄志强1柳策1张宁1王国林2于富来2
Impact of Deep Foundation Pit Covered-excavation Reverse Construction in Water-rich Sand Layers on Surrounding Environment
HUANG Zhiqiang1LIU Ce1ZHANG Ning1WANG Guolin2YU Fulai2
-
作者信息:1.沈阳工业大学建筑与土木工程学院，110870，沈阳
2.中铁上海工程局集团市政环保工程有限公司，201906，上海
-
Affiliation:1.School of Architecture and Civil Engineering, Shenyang University of Technology, 110870, Shenyang, China
2.Municipal Environmental Production Engineering Co., Ltd., of CREC Shanghai Group, 201906, Shanghai, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2024.12.030
-
中图分类号/CLCN:U231.3
-
栏目/Col:研究报告
摘要:
［目的］随着我国城市现代化的不断推进,城市内可利用的空间越来越少,而深基坑多建设于环境敏感区域,基坑施工对周边环境的影响不可避免，尤其是富水深厚砂层地区的深基坑施工，一旦施工控制不当极易出现严重危害，因此需研究富水砂层深基坑盖挖逆作法施工对周边环境的影响。［方法］以沈阳地铁4号线沈阳北站为例，通过施工监测方法，分析了深基坑施工过程对地上建筑物、地下构筑物、地下管线、电力管廊的变形影响。［结果及结论］开挖初期，地上建筑物以沉降变形为主，随着开挖深度的增加，沉降变形逐渐减小，最终均呈现为隆起变形。地下构筑物变形受基坑开挖面位置影响较大，当开挖面接近构筑物基础埋深时，构筑物变形达到最大。地下管线有明显的位置性影响，右侧管线变形远大于左侧管线变形，两侧均以沉降变形为主。电力管廊变形与基坑开挖深度密切相关，当开挖深度较浅时，电力管廊基本不受影响，而在车站地下四层开挖施工期间，电力管廊变形开始逐渐增大。
Abstracts:
［Objective］ With the continuous advancement of urban modernization in China, the available space within cities is becoming increasingly scarce. Deep foundation pits are often constructed in environmentally sensitive areas, inevitably making impact on the surrounding environment. This is particularly true for deep foundation pits in areas with thick, water-rich sand layers, where improper construction control can easily lead to severe hazards. Therefore, it is necessary to study the impact of deep foundation pit covered-excavation reverse construction in water-rich sand layers on the surrounding environment. ［Method］ Using Shenyang North Railway Station on Shenyang Metro Line 4 as an example, the deformation impact of deep foundation pit construction on the above-ground buildings, underground structures, underground pipelines, and power corridors is analyzed through construction monitoring method. ［Result & Conclusion］ In the initial stages of excavation, the above-ground buildings primarily exhibit settlement deformation. As the excavation depth increases, settlement deformation gradually decreases, eventually presenting as upheaval deformation. The deformation of underground structures is significantly affected by the position of the excavation face, with maximum deformation occurring when the excavation face approaches the foundation buried depth of the structures. Underground pipelines show a clear positional impact, with the deformation of the right-side pipelines being much greater than that of the left-side pipelines, both primarily exhibiting settlement deformation. The deformation of power corridors is closely related to foundation pit excavation depth. When the excavation depth is relatively shallow, the power corridors are largely unaffected, but during the excavation of the fourth underground level of the station, the deformation of the power corridors begins to increase gradually.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 低空经济与城市轨道交通融合新趋势
过刊浏览
资料下载
友情链接