深圳河反滤土工布试验研究

Experimental study on filter geotextiles applied in Shenzhen River project

对深圳河治理工程边坡防护反滤运行期的土工布进行了综合试验研究 ,分析了土工布长期运行过程中的渗透性、保土性和淤堵性能 ,从强度损失角度分析了土工布长期运行的强度衰减情况 ,并对土工布的耐久性进行了试验分析。由试验知 ,土工布渗透系数降低约 10 0倍左右 ,而土工布强度降低了 5 0 %左右 ,强度衰减速率小于 0 .2 6% /月。试验表明 ,土工布已进入稳定渗透期和强度的稳定衰减期 。

Comprehensive tests on filter geotextiles applied in Shenzhen River are carried out, and the long term permeability, soil retention capacity and clogging of geotextiles are analyzed. The method of strength declining is used to analyze the long term strength of geotextile and geotextile durability. From the tests, the permeability of geotextile declines to few percent,meanwhile, the strength loses about 50 percent and the declining rate is less than 0.26 percent per month. It is indicated by the tests that the permeability and strength declining of geotextiles tend to be stable and the geotextiles meet the demands of filter protection.