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（武漢理工大學(xué)交通學(xué)院， 武漢 430063)
［摘要］以長沙市某深基坑工程為實(shí)例，在基坑周圍區(qū)域共布設(shè)39個監(jiān)測點(diǎn)，分別實(shí)時監(jiān)測了坑頂水平位移、周圍建筑物沉降、深層側(cè)向位移、地下水位和錨索內(nèi)力。根據(jù)監(jiān)測結(jié)果對各監(jiān)測項(xiàng)目的變形規(guī)律進(jìn)行了討論；分析了樁錨支護(hù)與土釘支護(hù)兩種支護(hù)結(jié)構(gòu)的變形特點(diǎn)。監(jiān)測數(shù)據(jù)和分析結(jié)果表明，該工程支護(hù)設(shè)計方案較優(yōu)且支護(hù)效果較好。監(jiān)測分析結(jié)果較好地確保了在深基坑開挖過程中周圍建筑和道路的安全與穩(wěn)定，對基坑支護(hù)設(shè)計和開挖施工能及時做出信息反饋，同時表明樁錨支護(hù)和土釘支護(hù)兩種基坑支護(hù)形式在長沙地區(qū)的適用性，對長沙區(qū)域類似深基坑工程具有參考價值。
［關(guān)鍵詞］深基坑； 監(jiān)測； 基坑支護(hù)； 變形規(guī)律
中圖分類號：TU413文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)02-0133-05
Monitoring and deformation law research of a deep foundation pit project in Changsha
Long Lin, Li Zhida
(School of Transportation, Wuhan University of Technology, Wuhan 430063, China)
Abstract:To monitor variations including the top horizontal displacement, the surrounding building settlement, the deep lateral displacement, the underground water level and anchor cable internal forces in a deep foundation pit project in Changsha, 39 monitoring points were arranged around the foundation pit. Deformation laws of monitoring programs as well as deformation characteristics of pile-anchor supporting structures and soil-nailing supporting structures were discussed and analyzed respectively. Monitoring data and analysis suggest that the supporting design scheme of this project is effective. Moreover, the analysis result of monitoring data could guarantee the safety and stability of the surrounding buildings and roads in the deep foundation pit engineering in the process of deep excavation, and provide timely information feedback on the design and construction of foundation pit support and excavation. Finally, results indicate that both the pile-anchor and soil-nailing support are applicable for projects in Changsha district, which can significantly provide reference for similar deep foundation pit projects in Changsha area.
Keywords:deep foundation pit; monitoring; foundation supporting; deformation law
作者簡介：龍林, 博士研究生, Email: longl152@whut.edu.cn。
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