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Field monitoring and analyses of the response of a block-faced geogrid wall using fine-grained tropical soils

机译:细粒热带土壤对砌块土工格栅墙的现场监测和分析

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This paper presents the results of a 4.2 m high instrumented section of block-faced geogrid wall built using fine-grained tropical soils as backfill. Laboratory tests were used to assess the soil resistance and the stress-strain behavior is reported. Monitoring was performed over two months, including the construction period, and indicated good performance. Reinforcement tension was measured at different locations in four different layers. A specific device was designed and used to monitor vertical and horizontal internal loads on blocks that comprised the wall face. Topography, inclinometers, and magnetic settlement plates were used to measure internal and external movements. Total pressure cells at five different locations near the foundation level measured vertical stresses. Analytical and finite element method analyses were carried out and the predicted and measured tension in the reinforcements and lateral movements are compared. In addition, the significance of soil matrix suction, induced stress due to backfill soil compaction, shear resistance parameters, on the wall block facing is discussed.
机译:本文介绍了使用细粒热带土壤作为回填物构建的一块4.2 m高的仪器化块面土工格栅墙截面的结果。使用实验室测试评估土壤阻力,并报告了应力应变行为。在包括施工期在内的两个月内进行了监测,并显示出良好的性能。在四个不同层的不同位置测量了钢筋的张力。设计了一种特定的设备,用于监视组成墙面的块上的垂直和水平内部负载。地形,测斜仪和磁沉降板用于测量内部和外部运动。在靠近地基高度的五个不同位置的总压力传感器可测量垂直应力。进行了分析和有限元方法分析,并比较了钢筋中的预计和实测张力以及横向运动。此外,还讨论了墙体面板上的土壤基质吸力,回填土压实引起的诱导应力,抗剪参数的重要性。

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