Settlement prediction of soft ground by modified layerwise summation method based on piezocone tests

TONG Li-yuan; TU Qi-zhu; LIU Song-yu; DU Guang-yin

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Settlement prediction of soft ground by modified layerwise summation method based on piezocone tests

更新时间：2026-06-25

- Settlement prediction of soft ground by modified layerwise summation method based on piezocone tests
- Vol. 32, Issue S2, (2011)
- 作者机构：
  
  1. 东南大学岩土工程研究所,南京,210096
  2. 中铁第四勘察设计研究院有限公司,武汉,430071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU433
- Online First：26 August 2011，
  
  Published：2011
- 稿件说明：
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TONG Li-yuan, TU Qi-zhu, LIU Song-yu, et al. Settlement prediction of soft ground by modified layerwise summation method based on piezocone tests[J]. 2011, 32(S2).
DOI：

TONG Li-yuan, TU Qi-zhu, LIU Song-yu, et al. Settlement prediction of soft ground by modified layerwise summation method based on piezocone tests[J]. 2011, 32(S2). DOI：

摘要

分层总和法在高速公路软基沉降的预测中得到了广泛的应用。然而，由于基于钻探的土层划分往往比较粗糙以及基于室内试验的压缩模量确定不太可靠，导致沉降预测与实际偏差较大。孔压静力触探（CPTU）作为一种新型的多功能原位测试技术，可以同时测试得到锥尖阻力、侧壁摩阻力和孔压沿深度的连续剖面，较好地改善这一状况。以连盐高速公路为研究实例，采用多变量统计分析中的最优分割理论，基于CPTU高精度测试数据对土层进行了精细划分，并通过实际沉降观测资料的反演分析确定了基于CPTU的压缩模量计算方法，进而通过对高速公路实测沉降和CPTU预测沉降的比较，验证了文中计算方法的有效性

Abstract

The layerwise summation method is widely used for predicting settlement of soft ground in highway construction practice. However

the results of predicted settlement often show bad match with the real monitoring settlement due to the low reliability of soil profiling and compression modulus predicting

solely based on the boring tests and laboratory tests. Therefore

the piezocone testing (CPTU) is especially useful for soil investigation of soft soils and settlement prediction

which can provide three continuous profiles of measurements

including tip resistance

sleeve friction and pore water pressure. A specific study in Lianyan Expressway was conducted. Firstly

the optimal segmentation method

one of multivariate statistical analysis methods

was used for the soil profiling using the tip resistance measurements. Then

by inversion analysis of monitoring settlement data

the compression modulus was evaluated using the measurements of CPTU. Lastly

the comparison between the predicting and the monitoring settlements shows that the presented method is reliable for settlement prediction of soft ground.

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