-
●非對稱異性隧道聯絡通道冷凍法(07月24日)
-
●水泥夯土材料抗壓強度試驗及耐(08月25日)
-
●變質巖類順層邊坡破裂跡象及邊(07月25日)
-
●大體積混凝土配合比優化設計在(08月25日)
-
●粉煤灰基超高性能混凝土配合比(07月25日)
-
●地鐵車輛段檢修庫裝配式混凝土(07月24日)
-
●大型十字交叉地鐵車站結構地震(07月25日)
-
●變坡面淺埋偏壓小凈距隧道圍巖(07月24日)
-
●邯鄲富水地層深基坑支護優化和(07月25日)
-
●自密實抑溫防水復合材料在地下(08月25日)
-
●粉煤灰摻量對高層建筑筏板基礎(06月26日)
-
●基于遺傳算法的神經網絡對大體(06月27日)
-
●氯鹽漬土無側限抗壓強度及體變(06月25日)
-
●不同 ZrO2 摻量改性水(06月26日)
-
●非均勻銹蝕對建筑鋼混組合梁承(06月27日)
-
●再生微粉泡沫混凝土力學性能研(06月25日)
-
●堿激發粉煤灰-高爐礦渣粉固化(09月11日)
-
●地鐵車輛段檢修庫裝配式混凝土(07月24日)
-
●昌寧隧道豎井輔助正洞施工技術(07月03日)
-
●堅硬頂板沿空留巷充填體加固技(06月25日)
PDF全文閱讀
呂 凱
(上海市地礦建設有限責任公司 ,上海 200040)
摘 要 :在軟土地區深基坑工程中 ,地層高壓縮性 、低滲透性及環境敏感性對支護技術提出更高要求。以 上海某調蓄池項目為背景 ,針對開挖深度達 16. 6 m( 局部 18. 1 m ) , 引入自動伺服系統。通過構建多維度監測 網絡 ,系統追蹤地下連續墻側向位移 、支撐軸力動態變化 、周邊地表沉降及坑外水土響應特征 ,結合自動伺服 系統的實時反饋與動態調整機制 ,驗證其主動控制變形能力。結果表明: 自動伺服系統通過壓力閾值設定與多級支撐協同 ,顯著降低地下連續墻最大側移至 0. 1% H ( H 為開挖深度),較傳統實測規范均值縮減 31 . 3% ; 系 統的自適應調節有效平衡了軟土流變效應與開挖卸荷應力釋放間的矛盾 ,其 “預測 -響應 -補償 ” 閉環邏輯為 復雜地層基坑工程提供新思路。
關鍵詞: 自動伺服系統 ;深基坑 ;變形控制
中圖分類號:TU43 文獻標志碼:A
文章編號: 1005- 8249 (2025) 03- 0084- 06
DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .03 .016
LV Kai
(Shanghai Geological and Mineral Construction Co., Ltd., Shanghai 200040,China)
Abstract:In deep foundation pit engineering in soft soil areas, the high compressibility, low permeability and environmental sensitivity of the strata pose higher requirements for support technology.Traditional deep excavation projects commonly adopt a support system combining diaphragm walls with concrete struts, while systematic research on the support structure integrating diaphragm walls with composite servo steel struts remains relatively scarce. Taking a Shanghai storage tank project as the background, for an excavation depth reaching 16.6 m (locally 18.1 m), the support system adopts an automatic servo steel support system.Monitoring data is used to track the lateral displacement of diaphragm walls, the dynamic changes of the support axial force, the surrounding ground surface settlement and the response characteristics of the water and soil outside the pit are systematically tracked. Combined with the real-time feedback and dynamic adjustment mechanism of the servo system, its active control deformation ability is verified. The research found that the servo system, through the pressure threshold setting and the coordination of multi-level supports, significantly reduced the maximum lateral displacement of the underground continuous wall to 0.1%H (H is the excavation depth), which is 31.3% lower than the average value of the traditional measured norms. Theoretical analysis shows that the self-adaptive regulation of the system effectively balances the contradiction between the rheological effect of soft soil and the stress release of excavation unloading, and its "prediction-response-compensation" closed-loop logic provides a new idea for complex stratum foundation pit engineering.
Key words:automatic servo system; deep excavation engineering; deformation control
作者簡介: 呂 凱 (1992—) , 男 ,碩士 ,工程師 ,研究方向 :巖土工程。
收稿日期:2025 - 04 - 19
冀公網安備13011002000529 技術支持:數字河北 