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Settlement of an embankment treated with preloading and prefabricated vertical drain of east-coast highway phase 2 (a case study)

机译:东海岸公路二期预载和预制垂直排水处理的路堤沉降(案例研究)

摘要

Soft soils are not suitable for construction of buildings or facilities without having soil improvements. The soil improvements that are used in the chosen site are Preloading and Prefabricated Vertical Drain (PVD). Analysis of settlement is important to evaluate the site before the construction begins. The objectives of the study are, to predict settlement of an embankment based on Terzaghi OneDimensional Consolidation analysis, to obtain the final settlement by using Asoaka's method based on monitoring data and to compare the soil properties from the lab data with back calculated based on the firn:il settlement. Using Terzaghi One-Dimensional Consolidation Method, prediction of the total settlement is 287mm. The data from monitoring record are used to plot Asoaka's Graph in order to get the actual settlement which is 13mm, then being used to back calculate soil properties. The soil properties those are back calculated based on field settlement are different from those obtained from lab data. The differences can be seen by the correlation between the field and lab, which are for the Coefficient of Vertical Consolidation, Cv field = 0.04 Cv lab, the correlation for Coefficient of Horizontal Consolidation, ch field = 0.04 ch lab, the correlation for the Compression Index, Cc field = 0.043 Cc lab and the correlation of Recompression Index, Cr field = 0.06 Cr lab. This particular correlation can be used as a design guideline to similar site condition.
机译:如果没有改良土壤,软土不适合用于建筑物或设施的建造。在所选地点使用的土壤改良剂为预加载和预制垂直排水(PVD)。沉降分析对于在施工开始之前评估场地很重要。该研究的目的是,基于Terzaghi一维固结分析预测路堤的沉降,使用基于监测数据的Asoaka方法获得最终沉降,并将实验室数据中的土壤特性与基于烧成率的反算结果进行比较。 :il解决。使用Terzaghi一维固结方法,预测的总沉降为287mm。监控记录中的数据用于绘制Asoaka图,以获取13mm的实际沉降,然后用于反算土壤特性。根据野外沉降反算的土壤特性与实验室数据不同。通过现场和实验室之间的相关性可以看出差异,对于垂直固结系数,Cv场= 0.04 Cv lab,水平固结系数的相关性,ch场= 0.04 ch lab,对于压缩率的相关性指数Cc场= 0.043 Cc实验室,再压缩指数Cr场的相关性= 0.06 Cr实验室。这种特殊的相关性可以用作类似场所条件的设计指南。

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    Nur Anis Adlina Mat Noor;

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  • 年度 2012
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