Use of SASW Measurements to Evaluate the Effect of Lime Slurry Conditioning in Drilled Shafts
Use of SASW Measurements to Evaluate the Effect of Lime Slurry Conditioning in Drilled Shafts
复制标题
使用 SASW 测量来评估钻孔竖井中石灰浆调节的效果
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
M. O’neill
中科院分区：
文献类型：
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作者：
M. Kalinski;A. Ata;K. Stokoe;M. O’neill
表面波频谱分析 (SASW) 测试是在 NGES“TXHOUSTO”试验场对未经处理和处理过的钻孔竖井进行的，作为桥墩基础施工钻孔竖井土壤石灰浆调节研究的一部分。对未经处理的轴进行 SASW 测试的结果显示，在厚度略小于一个轴直径的环形区域内，剪切波速度（Vs；小应变剪切刚度的度量）有所降低。这种减少归因于挖掘过程中的应力释放和土壤扰动。在经过处理的竖井中进行 SASW 测试的结果表明，竖井周围土壤的 Vs 取决于测量是在地下水位之上还是之下进行。在地下水位上方，由于石灰和部分饱和土壤孔隙空间中的二氧化碳之间的反应，形成了一个薄薄的（小于0.15m）硬质胶结土环带。由于粘土在地下水位以下处于饱和状态，因此孔隙中没有二氧化碳...
Spectral-Analysis-of-Surface-Waves (SASW) testing was conducted in untreated and treated drilled shafts at the NGES “TXHOUSTO” test site as part of a study on lime-slurry conditioning of soil in drilled shafts for pier foundation construction. Results of SASW testing in an untreated shaft revealed a reduction in shear wave velocity (Vs; a measure of small-strain shear stiffness) within an annular zone slightly less than one shaft diameter in thickness. This reduction is attributed to stress relief and soil disturbance during excavation. Results of SASW testing in a treated shaft revealed that Vs of the soil surrounding the shaft depended upon whether the measurement was performed above or below the water table. Above the water table, a thin (less than 0.15m) annulus of stiffen cemented soil was created due to the reaction between the lime and the carbon dioxide in the pore spaces of the partially saturated soil. Since the clay was saturated below the water table, there was no carbon dioxide in the pore sp...