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叶观宝, 饶烽瑞, 张振, 鲁旺达, 苏泽昊, 许诗蕾. 基于监测数据反演的软土高填方地基性能分析[J]. 岩土工程学报, 2017, 39(z2): 62-66. DOI: 10.11779/CJGE2017S2016
引用本文: 叶观宝, 饶烽瑞, 张振, 鲁旺达, 苏泽昊, 许诗蕾. 基于监测数据反演的软土高填方地基性能分析[J]. 岩土工程学报, 2017, 39(z2): 62-66. DOI: 10.11779/CJGE2017S2016
YE Guan-bao, RAO Feng-rui, ZHANG Zhen, LU Wang-da, SU Ze-hao, XU Shi-lei. Back analysis of performance of high fill embankment on soft soils based on field data[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(z2): 62-66. DOI: 10.11779/CJGE2017S2016
Citation: YE Guan-bao, RAO Feng-rui, ZHANG Zhen, LU Wang-da, SU Ze-hao, XU Shi-lei. Back analysis of performance of high fill embankment on soft soils based on field data[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(z2): 62-66. DOI: 10.11779/CJGE2017S2016

基于监测数据反演的软土高填方地基性能分析

Back analysis of performance of high fill embankment on soft soils based on field data

  • 摘要: 在软土地区进行高填方路堤施工时地基会产生较大的变形,需要在填筑施工过程中严密监测地基的变形和孔压变化情况。介绍了国外某软土地区高填方机场跑道的建设,通过现场监测获得了路堤填筑过程中地基沉降和孔隙水压力的变化规律。基于第一级堆载预压获得的监测数据,采用反演分析获得了基于孔压数据和沉降数据拟合的径向固结系数和地基的平均固结度。在第一级加载监测数据反演分析的基础上,预测了地基在下一级堆载下沉降发展规律。同时,根据监测数据得出了孔压系数与路堤堆载速率之间的关系,为控制堆填速率提供参考。对指导软土地区高填方路堤工程的监测具有借鉴意义。

     

    Abstract: Constructing high-fill embankment over soft soils will lead to a substantial deformation of foundation, therefore it is necessary to strictly monitor the settlement and pore water pressure of the foundation. A high-fill airport pavement project in Republic of Guyana is introduced. The settlement and pore water pressure are obtained based on the monitoring data. Using the introduced back analysis method based on the monitoring data of settlement and pore water pressure at the first loading stage, the coefficient of consolidation is obtained and the development of settlement at the second stage is predicted. The relationship between the coefficient of pore water pressure and the backfilling rate is proposed based on the field data. The findings and discussions may provide a guide for the monitoring project of high-fill embankment constructed on soft soils.

     

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