土体干密度对防渗土工膜膜下气场的影响

The impact of dry density on the pneumatic field under waterproof geomembrane

本文采用室内试验方法模拟水库现场实际情况,分析平原水库库盘土工膜防渗情况下,库底土体干密度对土工膜膜下气场的影响。结果表明:膜下土体干密度对膜下气场影响明显,干密度越大,库区膜下气场产生速率及气压越小。建议在平原水库库底土工膜防渗时要做好库区基底碾压,尽量选用干密度较大的土壤。

By simulating the actual situation with laboratory experiment ,this study analyzes the impact of dry density on the pneumatic field under the geomembrane given that the geomembrane of the plain reservoir is waterproof.The result shows that significant impact exists ：the higher dry density, the lower speed and pressure that the pneumatic field cause.Therefore ,the suggestion is to ensure the rolling compaction of the reservoir basement, and use soil with higher dry density.