土-膨润土系竖向隔离墙的施工和易性分析

发布时间：2018-12-14 17:37

【摘要】：土膨润土系竖向隔离墙的施工和易性包括膨润土浆液的水质、密度、马氏漏斗黏度、API滤失量,以及满足坍落度要求的隔离墙材料含水率wB范围.对已有试验研究结果进行综合分析,明确了满足膨润土浆液施工和易性要求的膨润土掺量与膨润土液限间的关系,并定量评价了膨润土掺量及隔离墙材料液限对wB范围的作用规律.结果表明,膨润土浆液制备中应选用液限大于200%的膨润土;相同膨润土掺量条件下,wB随膨润土液限增大而增加;隔离墙材料坍落度为125 mm所对应的含水率与隔离墙材料液限的比值集中于1.2~1.6,且2者间存在良好的线性经验关系.此外,针对液限无法确定的隔离墙材料,提出隔离墙材料的表观液限,建立了各类隔离墙材料的表观液限与wB的统一经验关系以预测施工和易性.
[Abstract]:The construction and easiness of the vertical separation wall of soil-bentonite system includes the water quality, density, Markov funnel viscosity, API filtration amount and wB range of wall material moisture content which meets the slump requirement. The relationship between the content of bentonite and the liquid limit of bentonite, which meets the requirements of bentonite slurry construction and easiness, is analyzed synthetically. The effect of bentonite content and barrier material liquid limit on wB range was evaluated quantitatively. The results show that bentonite with a liquid limit of more than 200% should be used in the preparation of bentonite slurry, and the wB increases with the increase of the liquid limit of bentonite under the same content of bentonite. The ratio of moisture content to the liquid limit of the wall material corresponding to the slump of the wall material is 125 mm, and the ratio of the water content to the liquid limit of the wall material is concentrated at 1.21.6.There is a good linear empirical relationship between the two materials. In addition, the apparent liquid limit of the wall material is proposed, and the unified empirical relationship between the apparent liquid limit of the wall material and the wB is established to predict the construction and easiness.
【作者单位】：东南大学岩土工程研究所;东南大学江苏省城市地下工程与环境安全重点实验室;南京大学地球科学与工程学院;
【基金】：国家自然科学基金重点资助项目(41330641);国家自然科学基金资助项目(41472258,51278100) 江苏省杰出青年基金资助项目(BK2012022) 东南大学优秀博士学位论文基金资助项目(YBJJ1343)
【分类号】：TU765

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