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Characterization of deep cement mixing wall behavior using wall-to-excavation shape factor

机译：利用开挖形状因子表征水泥深层搅拌墙的性能

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摘要

This research proposes a novel performance-based design concept to characterize the horizontal displacement of DCM walls and the responsiveness of wall displacement to wall strength. In the study, a DCM-walled excavation project was utilized as the base case. Parametric study was then conducted to examine the wall behavior with diverse wall shapes. In addition, the responsiveness of wall to material strength and the effect of variable excavation depths on the wall behavior were determined. A downscaled field test was carried out to validate the parametric study. The wall-to-excavation shape factor was subsequently proposed as the design concept to facilitate the selection of suitable wall shape to a given excavation depth. Further validation indicated that the wall-to-excavation shape factor effectively characterized the wall horizontal displacement and the responsiveness of displacement to wall strength. In essence, the proposed concept is of use to the preliminary design of DCM walls and helps identify the cause of excavation failure.
机译：这项研究提出了一种新颖的基于性能的设计概念，以表征DCM墙的水平位移以及墙位移对墙强度的响应。在研究中，以DCM墙为基础的开挖项目为基础案例。然后进行参数研究，以检查具有各种壁形状的壁行为。此外，还确定了墙对材料强度的响应性以及开挖深度对墙体行为的影响。进行了缩小规模的现场测试，以验证该参数研究。随后提出了墙到挖掘的形状因数作为设计概念，以便于根据给定的挖掘深度选择合适的壁形状。进一步的验证表明，墙体开挖形状因数有效地表征了墙体水平位移和位移对墙体强度的响应。本质上，提出的概念可用于DCM墙的初步设计，并有助于确定开挖失败的原因。

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