黄土地区重力式挡土墙基底处理措施的研究分析

Base Treatment Analysis of Gravity Retaining Wall in the Loess Region

基于榆佳高速公路工程,针对黄土地区重力式挡土墙基底地基容许承载能力不足问题,提出了换填法、钢筋混凝土底板、冲击碾压、重锤夯实等不同的基底处置方案。从理论计算着手分析了不同方案的处置结果,并应用土力学原理计算分析了基底下土中应力情况。分析结果表明,换填法对基底应力改善有限,钢筋混凝土底板能够有效减小基底应力,钢筋混凝土底板和重锤夯实结合能使基底压应力和地基容许承载能力得到双重改善。

Regarding the insufficient problem of the carrying capacity for the foundation of gravity re- taining wall in the loess region, different treating program of foundation such as replacement, reinforced concrete base slab, impact rolling, and hammer compaction are proposed based on the Yulin--Jianxian ex- pressway project. The results of different program are analyzed by theory and calculations, and the soil stress conditions under the foundation are analyzed by the application of the soil mechanics principles. The analysis results indicate that it is limited to improve basal stress by replacement, and reinforced concrete floor can effectively reduce the basal stress, while the basal stress and carrying capacity are greatly im- proved by combination of reinforced concrete base slab and hammer compaction.