江珠高速公路深厚软土固结历史特性分析

何 晖

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铁道工程学报 ›› 2010, Vol. 27 ›› Issue (6) : 36-41.

路网研究

江珠高速公路深厚软土固结历史特性分析

何晖

作者信息 +

Analysis of Consolidation Historic Characteristics of Deep Soft Soil Embankment of Jiangmen-Zhuhai Highway

HE Hui

Author information +

文章历史 +

摘要

研究目的：在软土路堤设计中,沉降计算和稳定性验算均宜考虑软土的固结历史。本文以江珠高速公路珠海段试验路堤为例,在对室内土工试验、十字板剪切试验资料整理与分析的基础上,通过研究得出该区深厚软基的固结历史特性。

研究结论：研究区6～12 m以上软土层为超固结状态,超固结比OCR=1.10～1.89,但所得OCR值离散性较大。区内软土深度6～12 m以下为欠固结状态,超固结比OCR=0.45～0.94,计算结果比较可靠。在研究深度范围内,OCR值沿深度变化呈减小趋势。研究表明,采用十字板剪切试验判别软土固结历史能避免取样及室内土工试验对土样的扰动,结果能反映土体实际固结状态。

Abstract

Research purposes：In design of soft soil embankment, the calculations of the settlement and stability of the embankment need consideration of the consolidation history of soft soil. Based on sorting and analyzing the data from a large number of indoor soil mechanic tests and vane shear tests done for the experimental section of the Jiangmen-Zhuhai Highway in Zhuhai, the study was done to seek the consolidation historic characteristics of the deep soil embankment in this area.

Research conclusions：The upper soft soil layer at depth of 6~12 m and above in the area was in consolidation state, and its over-consolidation ratio was 1.1~1.89, but the value of OCR had rather big discreteness. The soft soil below the depth of 6~12 m in the area was in the less consolidation state, and its OCR was 0.45~0.94 and their calculated results were more reliable. In addition, in the depth range of the study, the OCR was reduced with the depth change. The experimental results showed using vane shear test to determine the consolidation history of soft soil could avoid the disturbance to the soil caused by soil sampling during consolidation for the indoor soil mechanic test and the result could reflect the actual consolidation state of the soil.

导出引用

何晖. 江珠高速公路深厚软土固结历史特性分析[J]. 铁道工程学报, 2010, 27(6): 36-41

HE Hui. Analysis of Consolidation Historic Characteristics of Deep Soft Soil Embankment of Jiangmen-Zhuhai Highway[J]. Journal of Railway Engineering Society, 2010, 27(6): 36-41

中图分类号： U416

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