土钉和桩列式复合围护结构分析

Analysis of the Composite Retaining Structure for Deep Excavation with Soil-nailing & Piles-wall

长兴电厂技改工程输煤系统要求翻车机房地下部分基坑开挖深度为18 6m,最深处达20 4m,平面尺寸为31 2m×27 0m,在沿海软土地区建造这样深的地下建筑较少见到,对围护结构的侧向变形要求很高,该工程具有一定的难度和风险。根据安全经济和便于施工的原则结合场地条件和工程实践,提出了土钉和桩列式复合围护结构方案,成功地解决了这一难题。经过现场监测效果良好,符合质量要求,其技术经济指标较佳。

This article discussed the retaining structure design for deep excavation of workshop,which for the tip lorry in Changxing Electric Plant.The Engineers brought a new retaining structure style with soilnailing & pileswall for deep excavation,they have made a nonlinear finite element analysis to this style,and proved the rationality through the comparison to results of the roadtest.