Study on Functional Characteristics of Geomembranes as New Construction Materials by Centrifugal Model Tests

新型建筑材料土工膜功能特性的离心模型试验研究

• 批准号: 04650430
• 负责人: IMAIZUMI Shigeyoshi
• 金额: $ 1.34万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650430/
• 关键词: Geomembrane; centrigugal Test; Frictional Characteristic; Pull-out Force; Consolidation; Lining; Design; 残留強さ

The geomemgrane, especially new material called HDPE (High Density Poly-Etylen), is expected to be employed as a liner of waste landfill. Because, it is preferable to ordinary rubber from a point of viev of strebgth an dchemical survivability. The object of this project is to get basic data which are useful to develop a design method by performing the experiments such as direct shear tests for soil-HDPE interface, pull-out tests of geomembrane form embedding ground and tests for estimating of tensile force by friction with consolidation fo waste. the following of tensile force by friction with consolidation of waste. the following are revealed : 1. Small size sample such as 60-mm diameter can over-estimate a shear strength of soil-HDPE interface. Large sample size of 300-mm is preferable. 2. The efficiencies of frictional strength for soil-HDPE Iinterface is 0.3 - 0.6, which is lower than those of soil-geotextile interface. 3. Equation showing a relation between pull-out force an deformation at fromt of geomembrane in a pull-out test was derived. It suggests that the higher a friction coefficient and the thicker the cover soil, the smaller a deformation for a given pull-out force. 4. Use of centrifuge for estimating a tesile force in geomemgrane induced by friction with consolidation can save the testing time considerably. For example, only 12 hours in cetrifuge tests corresponds to 2 years in actua field behavior. 5. The tnsile force in HDPE induced by friction of kaorin clay's consolidation is 0.06kgf/cm2 on the average. This is too low. Actual waste such as fry-ash may result in higher vales. It is expected to do a test for such the materials.

土工材料，特别是高密度聚乙烯（HDPE）新材料，有望用作垃圾填埋场的衬垫。因为，从强度和耐化学腐蚀性的角度来看，它比普通橡胶更好。本课题的主要目的是通过对HDPE土界面的直剪试验、土工膜埋置地基的拉拔试验和垃圾固结摩擦拉力估算试验，为设计方法的研究提供基础数据。随后的拉力通过摩擦与固结的废物。揭示了以下几点：1.小尺寸样品（如直径60 mm）可能高估土壤-HDPE界面的剪切强度。最好是300 mm的大样品尺寸。2.土-HDPE界面的摩擦强度系数为0.3 ~ 0.6，低于土-土工织物界面的摩擦强度系数。3.推导了土工膜拉拔试验中拉拔力与变形的关系式。结果表明，对于给定的拔出力，摩擦系数越大，覆盖土越厚，变形越小。4.用离心机估算固结摩擦引起的土工膜拉伸力，可大大节省试验时间。例如，在离心试验中只有12小时对应于2年的实际现场行为。5. HDPE中高岭土固结摩擦力的平均值为0.06kgf/cm ~ 2。太低了。实际废物，如油炸灰，可能导致更高的价值。希望对此类材料进行测试。

项目成果

今泉繁良: "ジオメンブレン-粒状土の層間摩擦特性" 第48回土木学会年次学術講演会概要集. III. 1160-1161 (1993)

Shigeyoshi Imaizumi：“土工膜 - 粒状土的层间摩擦特性”日本土木工程学会第 48 届学术年会摘要 III 1160-1161（1993）。

今泉繁良: "ジオメンブレン-粒状土の層間摩擦特性" 第8回ジオテキスタイルシンポジウム発表論文集. 59-67 (1993)

今泉重义：“土工膜-颗粒土的层间摩擦特性”第八届土工织物研讨会论文集59-67（1993）。

Shigeyoshi IMAIZUMI: "Soil-Geomembrane Interface Fristion Characerristics (in Japanese)" Proc. of the 8th Japan Symposium on Geotextiles. 59-67 (1993)

Shigeyoshi IMAIZUMI：“土壤-土工膜界面摩擦特性（日语）”Proc。

Shigeyoshi IMAIZUMI: "Effect of Variation in Sample Size on Soil-Polymer Interface Strength" Proc. of 5th Int. conf. on Geotextiles and Geomembranes and Related Products. (under printed).

Shigeyoshi IMAIZUMI：“样本大小变化对土壤-聚合物界面强度的影响”Proc。

Shigeyoshi Imaizumi: "Effect of Variation in Sample Sizeson Soil-Polymer Interface Strength" Proc.5th Int.Conf.on Geotextiles Geomembranes. (印刷中). (1994)

Shigeyoshi Imaizumi：“样本尺寸变化对土壤-聚合物界面强度的影响”Proc.5th Int.Conf.on Geotextiles Geomembranes（正在出版）。