長江漫灘非對稱荷載下基坑圍護結構變形特性研究*
                                  • 作者: 戈銘,賀智江,丁建文
                                  論文摘要

                                  長江漫灘非對稱荷載下基坑圍護結構變形特性研究*

                                  戈銘1,賀智江2,丁建文2

                                  (1.南京市江北新區樞紐經濟發展管理辦公室,江蘇 南京 211800; 2.東南大學交通學院,江蘇 南京 210096)

                                  [摘要] 以長江漫灘地層中某緊鄰道路的明挖隧道深基坑為背景,通過現場測試與有限元分析,研究了非對稱荷載對基坑開挖變形特性的影響規律。實測結果表明:由于臨時道路路堤荷載與車輛動荷載作用,偏壓一側基坑圍護墻體的側向變形明顯較大,同時另一側基坑圍護側墻頂部有向基坑外偏移的趨勢;兩側變形不對稱程度相對較小,這與偏壓荷載大小及其與坑壁的距離等有關;由于長江漫灘相軟土具有顯著的蠕變特性,故側墻變形具有顯著的時間效應。有限元計算表明,隨著不對稱荷載的增加及其與坑壁距離的減小,偏壓側墻體位移模式不變,但側移量增加,非偏壓側頂部向坑外的偏移量亦增加,基坑兩側圍護結構變形的不對稱程度不斷增大。

                                  [關鍵詞] 深基坑;長江漫灘;圍護結構;非對稱;變形特性;數值模擬

                                  [中圖分類號]TU43   [文獻標識碼]A           [文章編號]1002-8498(2021)07-0021-05

                                  Study on Deformation Behavior of Retaining Wall with Asymmetric Load in the Yangtze River Floodplain  

                                  GE Ming1, HE Zhijiang2, DING Jianwen2

                                  (1.Hub Economic Development Management Office of Nanjing Jiangbei New Area, Nanjing, Jiangsu 211800, China; 2.School of Transportation, Southeast University, Nanjing, Jiangsu 210096, China)

                                  Abstract: Based on a tunnel excavation close to a road in Yangtze River floodplain, the influence of asymmetric load on the retaining walls of two sides are studied by methods of field monitoring and finite element. The field results show that the lateral displacement of the retaining wall at the side with asymmetric load is larger than the other side, and the top of retaining wall of the other side move outwards. The deformation asymmetry on both sides is relatively small, which can be ascribed to the factors of the asymmetric load and the distance between the load and the retaining wall. The effects of time space characteristics are found remarkable due to the creep characteristics of soft clay in Yangtze River floodplain. The results of finite element method indicate that the lateral displacement of the side with asymmetric load increases with the increase of the asymmetric load and the decrease of the distance, the extent of asymmetry of two sides increase as well.

                                  Keywords:deep foundation excavation; Yangtze River floodplain; retaining structure; asymmetric; deformation behavior; numerical simulation

                                  *江蘇省建設系統科技項目及科技示范工程項目(2015ZD44

                                  [作者簡介] 戈銘,碩士,高級工程師,E-mail: njkys_gm@163.com 

                                   

                                  主辦單位:亞太建設科技信息研究院有限公司 中國建筑集團有限公司 中國土木工程學會    承辦單位:施工技術傳媒機構
                                  京ICP備17044493號-16

                                  京公網安備 110102000406-6
                                  主編:張可文 電話:010-57368788   編輯部:010-57368789,010-57368790
                                  廣告、理事會:010-68300059,010-68330203,010-68341147   郵購及查詢010-68341147  傳真010-68300061
                                  地址:北京市西城區德勝門外大街36號中國建設科技集團4層   郵編:100120        Email:sgjs@cadg.cn
                                  施工技術網群鼓勵技術交流,信息交流。群號:43883790    75228828    新浪微博:@施工技術傳媒機構  
                                  4d玉蒲团奶水都喷出来了