光氧老化对加筋砂土地基承载力的影响

Effect of photooxidation aging on bearing capacity of reinforced sandy soil foundation

为了解光氧老化对三向土工格栅加筋土地基承载力的影响,首先用耐气候老化试验箱对三向土工格栅进行光氧老化,随后采用老化好的土工格栅展开加筋地基平板载荷试验。通过与素土和未经老化的三向土工格栅加筋地基承载力对比,分析老化对土工格栅加筋地基承载力的影响程度。结果表明:铺设老化土工格栅与铺设未经老化土工格栅地基相比,极限承载力降低了11.8%,沉降量增加了5.3%;在同一点处,铺设老化土工格栅地基中的土压力比铺设未老化土工格栅地基中的土压力大,但比素土地基中的土压力要小。

Abastract： In order to explore the effect of photooxidation aging on the bearing capacity of three-way geogrid reinforced soil foundation,a three-way geogrid was firstly subjected to photo-oxygen aging with a weather-resistant aging test chamber. And then a plate load test was carried out on the foundation.The influence of aging on the bearing capacity of the foundation was analyzed by comparing its bearing capacity with that of pure soil and non-aged three-way geogrid reinforced foundation. The results show that the ultimate bearing capacity of the aged geogrid reinforced soil foundation is reduced by 11. 8%,and that the settlement is increased by 5. 3%. At the same point,earth pressure in the foundation is larger than that in the non-aged three-way geogrid reinforced foundation,but smaller than that in the pure soil foundation.