考虑沉积环境影响的软土地基工程性质对比研究

doi:10.12068/j.issn.1005-3026.2017.03.025

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (3): 424-429.DOI: 10.12068/j.issn.1005-3026.2017.03.025

考虑沉积环境影响的软土地基工程性质对比研究

吴昌胜^1,2，朱志铎^1,2

(1. 东南大学交通学院，江苏南京210096； 2. 江苏省城市地下工程与环境安全重点实验室，江苏南京210096)

收稿日期:2015-04-29 修回日期:2015-04-29 出版日期:2017-03-15 发布日期:2017-03-24
通讯作者: 吴昌胜
作者简介:吴昌胜(1985-)，男，山东平邑人，东南大学博士研究生；朱志铎(1963-)，男，江苏兴化人，东南大学教授，博士生导师.
基金资助:
国家重点基础研究发展计划项目(2015CB057803).

Comparative Study on Geotechnical Properties of Soft Soils Considering Depositional Environment

WU Chang-sheng^{1, 2}， ZHU Zhi-duo^{1, 2}

1. School of Transportation， Southeast University， Nanjing210096， China; 2. Jiangsu Key Laboratory of Urban Underground Engineering & Environmental Safety， Nanjing 210096， China.

Received:2015-04-29 Revised:2015-04-29 Online:2017-03-15 Published:2017-03-24
Contact: WU Chang-sheng
About author:-
Supported by:
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摘要/Abstract

摘要： 为了研究软土不同沉积环境导致的工程性质的差异，选取了连盐高速公路连云港段和沪苏浙高速公路苏州段两个地区的典型软土，通过两个地区软土的总体指标和具体断面指标的分析，主要研究了软土的沉积环境、黏粒含量、矿物成分和pH值对软土工程性质的影响.研究结果表明:连云港海相软土是随着海平面的变化在碱性条件下逐渐沉积，物质主要来源于海洋沉积物，以黏粒为主，黏土矿物成分以伊蒙混层为主；与连云港海相软土不同，苏州冲湖积相软土是在中性或弱碱性条件下沉积，物质主要来源于茅山和天目山地区，以粉粒为主，黏土矿物成分以伊利石为主，含水量低于LY软土，无侧限抗压强度、灵敏度高于LY软土.

关键词: 软土, 沉积环境, 物质来源, 黏土矿物, 工程性质

Abstract: Typical soft soils from Lian-Yan Expressway (Lianyungang section) and Hu-Su-Zhe Expressway (Suzhou section) were selected to study the geotechnical properties through general indexes and specific sections indexes considering depositional environment， respectively. The effects of depositional environment， clay fraction， clay minerals， and pH values on geotechnical properties of soft soils in LY and HSZ were discussed. The research results are as follows: Lianyungang marine clay gradually deposits with the sea level change in alkaline condition. Its material sources derives from marine sediments. Clay fraction is dominant and the principal clay mineral of the soils is illite-smectite mixed-layer mineral. Differing from the Lianyungang marine clay， Suzhou lacustrine soft soil gradually deposits in neutral condition and weak alkaline condition. Its material sources derives from Maoshan and Tianmushan. Silt fraction is dominant and the principal clay mineral of the soils is illite. Water content is lower while the unconfined compressive strength and sensitivity are higher than that of Lianyungang marine clay.

Key words: soft soils, depositional environment, material sources； clay mineral； geotechnical properties

中图分类号:

P642.1

吴昌胜，朱志铎. 考虑沉积环境影响的软土地基工程性质对比研究[J]. 东北大学学报:自然科学版, 2017, 38(3): 424-429.

WU Chang-sheng ， ZHU Zhi-duo. Comparative Study on Geotechnical Properties of Soft Soils Considering Depositional Environment[J]. Journal of Northeastern University Natural Science, 2017, 38(3): 424-429.

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考虑沉积环境影响的软土地基工程性质对比研究

Comparative Study on Geotechnical Properties of Soft Soils Considering Depositional Environment

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