| 邱浩浩.黏土水泥浆材特性的试验研究[J].地质与勘探,2020,56(6):1272-1277 |
| 黏土水泥浆材特性的试验研究 |
| Experimental study on the properties of clay-cement grout[J] |
| 投稿时间：2019-09-26 修订日期：2020-09-01 |
| DOI：10.12134/j.dzykt.2020.06.016 |
| 中文关键词: 采空区 黏土水泥浆液 室内试验 配比 |
| 英文关键词: goaf, clay-cement grout, laboratory test, mixture ratio |
| 基金项目:国家自然科学基金项目（编号：41902298）、河北省自然科学基金项目（编号：D2019403151）和河北地质大学博士科研启动基金项目（编号：1714023）联合资助 |
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| 中文摘要: |
| 黏土水泥浆材是采空区处治的优选注浆材料，但目前关于优化浆材配比的研究较少。针对毕威高速公路水塘隧道出口段采空区处治工程，提出采用黏土水泥浆液进行注浆处理，并进行室内试验研究，得到了不同配比浆液的凝结时间、结石率、结石密度、结石体抗压强度、渗透系数及冲蚀率等性能指标。试验结果表明，固相比较低的浆液凝结时间较短，抗压强度较高，渗透系数较大；随原浆比重增加，浆液的凝结时间缩短，强度提高且渗透系数降低；偏铝酸钠可有效缩短浆液的凝结时间；最终确定了黏土水泥浆材的配比和原浆比重。本次研究可为高速公路下伏采空区的注浆治理提供设计依据。 |
| 英文摘要: |
| Clay-cement grout is the preferred grouting material for the treatment of goafs, but few studies focus on optimizing the mixture ratio. Aiming at the treatment of goafs in the exit section of the Shuitang Tunnel of Biwei Expressway, this study suggests to adopt clay-cement grout in grouting treatment and conducts laboratory tests to determine the setting time, concretion ratio, concretion density, compressive strength of concretion, permeability coefficient and erosion ratio of grouts with different mixture ratios. The test results show that the grout with a lower solid phase ratio has a shorter setting time, higher compressive strength and larger permeability coefficient. With the increasing of specific gravity, the setting time shortens; the compressive strength increases and the permeability coefficient decreases. The sodium metasilicate can effectively shorten the setting time of the grout. Finally, the mixture ratio and specific gravity of the clay-cement grouting materials are determined. This study provides a design basis for the grouting treatment of the goafs underlying highways. |
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