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首页> 外文会议>International symposium on geotechnical aspects of underground construction in soft ground >A case study of a deep excavation on a soft lacustrine clay of Bogota, Colombia, with emphasis between predicted and measured deformations
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A case study of a deep excavation on a soft lacustrine clay of Bogota, Colombia, with emphasis between predicted and measured deformations

机译：在哥伦比亚波哥大的软湖相粘土上进行深基坑开挖的案例研究，重点放在预测变形和实测变形之间

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The paper presents the results of the geotechnical analysis conducted of a deep excavation in the lacustrine soft soil of Bogota city, with emphasis on the differences between the predicted and the measured deformations of the diaphragm walls. The excavation had 11.25 m of depth, and following the construction process, seven inclinometers in order to date the spatial displacements induced during the construction of three basements and 40 m deep friction piles under the building infrastructure, including the monitoring of deformations related to base stability. The measurements were extended about 17 months. The project was located in the lacustrine soft soil of Bogota city, which is a very high compressible-plastic clay with void ratios from 3 to 5, compression indexes (Cc) from 1.2 to 2.0 and elastic young modulus under 1000 kPa, with medium to high organic matter contents. It was found that the overall predicted deformation behavior is not consistly with the measured deformations, mainly due to the differences between the real boundary conditions and the model, the localization of the instrumentation and the stiffness properties of the soils.
机译：本文介绍了在波哥大市湖相软土中进行的深基坑工程的岩土工程分析结果，重点是对隔板墙的预测变形与实测变形之间的差异。开挖深度为11.25 m，在施工过程中，为了确定建筑基础设施下的三个地下室和40 m深的摩擦桩在施工过程中引起的空间位移，包括七个倾斜仪，以监测与基础稳定性有关的变形。测量时间延长了约17个月。该项目位于波哥大市湖相软土中，这是一种非常高的可压缩塑料黏土，孔隙比为3至5，压缩指数（Cc）为1.2至2.0，弹性杨氏模量在1000 kPa以下，中等。有机物含量高。结果发现，整体预测的变形行为与实测的变形不一致，这主要是由于实际边界条件与模型之间的差异，仪器的局部性和土壤的刚度特性所致。

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