Cement-based fracture grouting phenomenon of weathered granite soil
Cement-based fracture grouting phenomenon of weathered granite soil
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DOI：
10.1007/s12205-016-0862-1
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发表时间：
2016-04
影响因子：
2.2
通讯作者：
Juwei Yun;J. Park;Y. Kwon;Byung-Kyu Kim;In-Mo Lee
中科院分区：
文献类型：
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作者：
Juwei Yun;J. Park;Y. Kwon;Byung-Kyu Kim;In-Mo Lee
针对朝鲜半岛半岛最丰富的风化花岗岩土，研究了裂隙灌浆和/或反渗透灌浆的注入过程，提出了确定裂隙起裂压力、裂隙长度和厚度以及压力诱导滤失现象的解析解。提出了一种理论，并通过室内试验进行了验证。试验结果表明，裂隙灌浆适用于非饱和风化花岗岩土，而反渗透灌浆适用于饱和风化花岗岩土。通过对非饱和风化花岗岩土的试验研究发现，当浆液水灰比小于1.25时，浆液会出现滤失现象。我们还能够证明，从实验中获得的裂缝起裂压力以及裂缝长度和厚度与从解析解中获得的理论值相当匹配。
The injection process of fracture grouting and/or fracture-permeation grouting is studied in this paper and analytical solutions are proposed to determine the fracture initiation pressure, the fracture length and thickness, and the pressure-induced filtration phenomenon for weathered granite soil, which is the most abundant soil type on the Korean peninsula. A theory is proposed and then verified through laboratory chamber tests. Experimental results show that fracture grouting occurs in unsaturated weathered granite soil, while fracture-permeation grouting occurs in saturated weathered granite soil. Also, through the experimental results with unsaturated weathered granite soil, it was found that the filtration phenomenon occurs when the water-cement ratio of the grout is less than 1.25. We were also able to demonstrate that the fracture initiation pressure as well as the fracture length and thickness obtained from the experiments match reasonably well with the theoretical values obtained from the analytical solutions.