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首页> 外文期刊>Journal of geotechnical and geoenvironmental engineering >Experimental Evidence of the Effectiveness and Applicability of Colloidal Nanosilica Grouting for Liquefaction Mitigation
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Experimental Evidence of the Effectiveness and Applicability of Colloidal Nanosilica Grouting for Liquefaction Mitigation

机译：胶体纳米粒子灌浆液化缓解效果和适用性的实验证据

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摘要

The low viscosity and the ability to control solidification rate make colloidal nanosilica grout an excellent ground-improvement solution which is functional for different engineering purposes. A comprehensive experimental programme was performed to test the effectiveness and applicability of low-pressure injection of aqueous nanosilica suspensions against seismic liquefaction and to provide the experimental basis for the design, execution, and control of treatments. Scanning electron microscope and X-ray diffraction tests carried out on samples prepared with variable dosages enabled analysis of the microstructure of the original material and grouted sand. The influence of the grout composition on the solidification rate, viscosity, and shear strength of the treated sand was evaluated with preliminary tests to optimize the use of material. The efficacy of treatment in terms of stress-strain response and liquefaction resistance was investigated with a series of drained monotonic and undrained cyclic triaxial tests. A quality control procedure based on sonic wave transmission was established by performing bender element tests on samples cured for different times. The intent was to find the trade-off between a cost-effective use of materials and the mechanical performance of the treated sand.
机译：低粘度和控制凝固率的能力使胶体纳米氏植物灌浆是一种优异的地面改善溶液，其具有不同的工程目的的功能。进行了综合实验计划，以测试低压注射纳米菌液悬浮液对地震液化的有效性和适用性，并为治疗的设计，执行和控制提供实验依据。扫描电子显微镜和X射线衍射试验在用可变剂量制备的样品上进行，使得能够分析原料和灌浆砂的微观结构。用初步试验评估了灌浆组合物对处理砂的凝固率，粘度和剪切强度的影响，以优化材料的使用。研究了在应力 - 应变反应和液化抗性方面的治疗效果用一系列排水的单调和不统治的环状三轴试验研究。通过对不同时间固化的样品进行弯曲元素试验来建立基于声波传输的质量控制程序。意图是在经济效益使用材料和经处理的沙子的机械性能之间找到权衡。

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