NUMERICAL SIMULATION ANALYSIS OF CONTROLLING SETTLEMENT BY WATER-RESISTING CURTAIN COMBINED WITH RECHARGE IN DEEP FOUNDATION PIT

IF 4.3 3区工程技术 Q1 ENGINEERING, CIVIL

Journal of Civil Engineering and Management Pub Date : 2024-07-12 DOI:10.3846/jcem.2024.21743

Xubing Xu, Yonglai Zheng, Xin Lan, Jie Pan, Yuan Wen

{"title":"NUMERICAL SIMULATION ANALYSIS OF CONTROLLING SETTLEMENT BY WATER-RESISTING CURTAIN COMBINED WITH RECHARGE IN DEEP FOUNDATION PIT","authors":"Xubing Xu, Yonglai Zheng, Xin Lan, Jie Pan, Yuan Wen","doi":"10.3846/jcem.2024.21743","DOIUrl":null,"url":null,"abstract":"This study takes a nearby foundation pit project of a high-speed railway in Yancheng City, Jiangsu Province as an example to investigate the impact of deep foundation pit projects on groundwater and the surrounding environment. Through on-site monitoring, in-situ testing, and numerical simulation, we conducted a comprehensive study of the impact of foundation pit projects on groundwater and the surrounding environment. The evolution of groundwater levels and surface displacement during the excavation of foundation pits was analyzed, and a method for measuring the permeability of target soil layers in situ was studied. The simulation of recharge under various soil conditions was performed, and the outcomes demonstrated the effective isolation of hydraulic connections between the interior and exterior of the foundation pit by the water-resistant curtain. Precipitation head and constant head recharging tests were employed to ascertain the actual permeability. The characteristic time method calculation exhibited remarkable efficiency and accuracy in determining the permeability coefficient of the recharging soil layer. Recharging phreatic and confined water layers has differing degrees of influence on surface deformation, with the impact of confined water layers requiring more time to stabilize. These findings contribute significantly to a more comprehensive understanding of the environmental repercussions associated with deep excavation projects, thereby enhancing safety and environmental protection measures in excavation construction practices.","PeriodicalId":15524,"journal":{"name":"Journal of Civil Engineering and Management","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Civil Engineering and Management","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.3846/jcem.2024.21743","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

This study takes a nearby foundation pit project of a high-speed railway in Yancheng City, Jiangsu Province as an example to investigate the impact of deep foundation pit projects on groundwater and the surrounding environment. Through on-site monitoring, in-situ testing, and numerical simulation, we conducted a comprehensive study of the impact of foundation pit projects on groundwater and the surrounding environment. The evolution of groundwater levels and surface displacement during the excavation of foundation pits was analyzed, and a method for measuring the permeability of target soil layers in situ was studied. The simulation of recharge under various soil conditions was performed, and the outcomes demonstrated the effective isolation of hydraulic connections between the interior and exterior of the foundation pit by the water-resistant curtain. Precipitation head and constant head recharging tests were employed to ascertain the actual permeability. The characteristic time method calculation exhibited remarkable efficiency and accuracy in determining the permeability coefficient of the recharging soil layer. Recharging phreatic and confined water layers has differing degrees of influence on surface deformation, with the impact of confined water layers requiring more time to stabilize. These findings contribute significantly to a more comprehensive understanding of the environmental repercussions associated with deep excavation projects, thereby enhancing safety and environmental protection measures in excavation construction practices.

查看原文本刊更多论文

深基坑止水帷幕结合回灌控制沉降的数值模拟分析

本研究以江苏省盐城市某高速铁路附近基坑工程为例，研究深基坑工程对地下水及周边环境的影响。通过现场监测、原位测试、数值模拟等方法，对基坑工程对地下水及周边环境的影响进行了综合研究。分析了基坑开挖过程中地下水位和地表位移的演变，研究了原位测量目标土层渗透性的方法。对各种土壤条件下的补给进行了模拟，结果表明防水帷幕有效隔离了基坑内部和外部之间的水力联系。采用降水水头和恒定水头补给试验来确定实际渗透率。在确定补给土层的渗透系数时，特征时间法计算显示出显著的效率和准确性。充水层和封闭水层对地表变形的影响程度不同，其中封闭水层的影响需要更长的时间才能稳定。这些发现有助于更全面地了解与深层挖掘工程相关的环境影响，从而加强挖掘施工实践中的安全和环境保护措施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Civil Engineering and Management ENGINEERING, CIVIL-

CiteScore

6.70

自引率

4.70%

发文量

审稿时长

1.7 months

期刊介绍： The Journal of Civil Engineering and Management is a peer-reviewed journal that provides an international forum for the dissemination of the latest original research, achievements and developments. We publish for researchers, designers, users and manufacturers in the different fields of civil engineering and management. The journal publishes original articles that present new information and reviews. Our objective is to provide essential information and new ideas to help improve civil engineering competency, efficiency and productivity in world markets. The Journal of Civil Engineering and Management publishes articles in the following fields: building materials and structures, structural mechanics and physics, geotechnical engineering, road and bridge engineering, urban engineering and economy, constructions technology, economy and management, information technologies in construction, fire protection, thermoinsulation and renovation of buildings, labour safety in construction.