Site Characterisation, Deep Basement Support, Construction, and Deformation Control

IF 1.7 Q3 ENGINEERING, GEOLOGICAL

Geotechnical and Geological Engineering Pub Date : 2023-09-15 DOI:10.1007/s10706-023-02634-y

Tiyamike Haundi, Horris K. Nangulama, Vincent R. Mbewe

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引用次数: 0

Abstract

Abstract Deep basement construction is characterised by a deformation challenge for the excavation pit and adjacent structures. Basement construction is an unavoidable problem in urban areas. A case is found in a Triumph Unit building block project, where a 14 m basement will be constructed near the existing structures. Conducting a site survey engineering analysis before the deep basement excavation is essential to guarantee safety during basement construction. Site survey engineering analysis is vital in recommending a suitable support structure for the basement pit during excavation. Therefore, this paper takes the Triumph Unit high-rise building basement excavation project as a practical application of site survey engineering analysis on the actual construction site. Geotechnical and groundwater characterisation were achieved through field and laboratory tests. The study revealed that the site was suitable for construction of bored piles as enclosure structure. It also recommended application of steel bracing material enhanced with a hydraulic servo system as basement excavation internal support structure. The recommended support structure is applied to the actual excavation. The excavation-induced deformation with respect to the recommended support structure application is strictly monitored and controlled. The measured project site results show the effectiveness of site survey engineering analysis in recommending a suitable deep basement excavation support system that controls the excavation-induced deformation desirably.

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场地特征、深基底支撑、施工及变形控制

摘要深基坑施工的特点是开挖基坑及其邻近结构的变形挑战。地下室建设是城市建设中不可回避的问题。在Triumph Unit建筑单元项目中发现了一个案例，该项目将在现有结构附近建造一个14米的地下室。深基坑开挖前进行现场勘察工程分析是保证地下室施工安全的必要条件。在基坑开挖过程中，现场勘察工程分析对于推荐合适的基坑支护结构至关重要。因此，本文以凯旋单元高层建筑地下室开挖工程为实际应用，对实际施工现场进行现场勘察工程分析。通过现场和实验室测试实现了岩土和地下水特征。研究表明，该场地适合钻孔灌注桩作为围护结构施工。建议采用钢支撑材料加液压伺服系统作为地下室开挖的内支撑结构。将推荐的支护结构应用于实际开挖。对推荐支护结构的开挖变形进行了严格的监测和控制。实测的工程现场结果表明，现场勘察工程分析在推荐合适的深基坑支护体系、控制基坑变形方面是有效的。

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来源期刊

Geotechnical and Geological Engineering ENGINEERING, GEOLOGICAL-

CiteScore

3.70

自引率

5.90%

发文量

298

期刊介绍： Geotechnical and Geological Engineering publishes papers in the areas of soil and rock engineering and also of geology as applied in the civil engineering, mining and petroleum industries. The emphasis is on the engineering aspects of soil and rock mechanics, geology and hydrogeology, although papers on theoretical and experimental advances in ground mechanics are also welcomed for inclusion. The journal encompasses a broad spectrum of geo-engineering although several areas have been identified which will be given particular priority: Soil and rock engineering; Foundation engineering; Applied geology for design and construction; Geo-environmental engineering; Earthquake engineering and dynamic behavior of soils and rocks; Geohazards and mitigation; Mining engineering; Geotechnical aspects of petroleum engineering; Information technology applications in geo-engineering; Novel geotechnical construction techniques; Case histories describing important geo-engineering projects. Geotechnical and Geological Engineering publishes contributions in the form of original and review papers, or as short technical notes.