潮汐作用下淤泥路基固结变形特性研究

›› 2009, Vol. 30 ›› Issue (4): 1142-1146.

潮汐作用下淤泥路基固结变形特性研究

向先超¹，侯剑舒¹，朱长歧²

1. 三峡大学三峡库区地质灾害教育部重点实验室，湖北宜昌 443002；2. 中国科学院武汉岩土力学研究所岩土力学重点实验室，武汉 430071

收稿日期:2007-07-02 出版日期:2009-04-10 发布日期:2011-01-30
作者简介:向先超，男，1976出生，博士，副教授，主要从事岩土加固技术及机理的研究。
基金资助:
湖北省教育厅自然科学研究项目(No. Q20081302)；湖北省自然科学基金计划项目（No. 2008CDB052）；三峡库区地质灾害教育部重点实验室主任基金项目（No. 2008ZRJ03）资助。

Consolidation deformation properties of silt roadbed under effect of tide

XIANG Xian-chao¹，HOU Jian-shu¹，ZHU Chang-qi ²

1. Key Laboratory of Geological Hazard on Three Gorges Reservoir Area of Education, Ministry, China Three Gorges University, Yichang 443002, China； 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

Received:2007-07-02 Online:2009-04-10 Published:2011-01-30

摘要/Abstract

摘要：

淤泥类软土的广泛分布是沿海地区高速公路建设中普遍遇到的岩土工程问题。海滩区淤泥长期受周期性的波浪和潮汐作用，在淤泥路基排水固结处理前，为便于施工，一般在两侧填筑围堰，并修建反压护道，波浪作用被阻隔，而潮汐通过排水层进入淤泥路基顶面，对淤泥路基的排水固结过程产生重要影响。基于海滩区淤泥路基中反压护道和潮汐的作用，建立了平面应变砂墙路基有限元计算模型。根据现场实测资料反算砂井路基水平渗透系数，并将三维砂井路基转换成平面应变砂墙路基，确定了转换后的等效渗透系数。计算结果表明潮汐、反压护道等对淤泥路基排水固结过程有显著影响。

关键词: 潮汐, 淤泥路基, 固结变形

Abstract:

Silt soft clay is widely distributed in littoral expressway foundation. Its consolidation is a popular geotechnical engineering issue. Seaside silt is always under periodical effect of wave and tide. Cofferdams and back berms are often built in the two sides of a roadbed for convenient construction, resulting in obstructing wave but letting tide come into the top of the silt roadbed through drainage layer, which have great influence on the consolidation process. A finite element model of plain strain sand-wall roadbed is established, in which the effect of back berms and tide is considered. The horizontal permeation coefficient of sand-drain roadbed is calculated from the field measurement data; and the corresponding horizontal permeation coefficient of sand-wall roadbed is ascertained. The calculation results show that the effect of tide and back berms on the consolidation process is obvious.

Key words: tide, silt roadbed, consolidation deformation

中图分类号:

TU 471.91

向先超，侯剑舒，朱长歧. 潮汐作用下淤泥路基固结变形特性研究[J]. , 2009, 30(4): 1142-1146.

XIANG Xian-chao，HOU Jian-shu，ZHU Chang-qi. Consolidation deformation properties of silt roadbed under effect of tide[J]. , 2009, 30(4): 1142-1146.

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