季冻区湿地软土固结特性与固结压力相关性的试验研究

英文篇名：Test Study on the Correlation between Consolidation Characteristics and Consolidation Pressure of Wetland Soft Soil in Seasonal Frost Area
中文刊名：森林工程
英文刊名：Forest Engineering
作者：王宏光 ; 程显东 ; 张冕 ; 田蕾蕾 ; 马强 ; 刘红军 ; 韩春鹏
英文作者：Wang Hongguang1 ; Cheng Xiandong1 ; Zhang Mian1 ; Tian Leilei1 ; Ma Qiang1 ; Liu Hongjun2 ; Han Chunpeng1 ( 1. Northeast Forestry University ; Harbin 150040 ; 2. Wu Yi University ; Jiangmen of Guangdong 529020)
中文关键词：季冻区 ; 湿地软土 ; 固结系数 ; 固结压力
英文关键词：seasonal frost area ; wetland soft soil ; consolidation coefficient ; consolidation pressure
出版日期：2010-07-15
机构：东北林业大学;五邑大学;
年：2010
期：04
出版单位：森林工程

摘要

针对黑龙江省松嫩平原湿地软土的固结特性,进行压缩固结试验研究。研究表明,季冻区软土孔隙比大、含水率大、压缩性强,其物理力学性质和工程性质略优于珠江三角洲软土。随着固结压力的增大,压缩系数逐渐减小,压缩模量逐渐增大,固结压力大于200 kPa时,压缩系数变化趋势逐渐变缓,固结系数随固结压力增大逐渐减小,其变化范围为1.71～7.11×10-4 cm2/s,固结系数在固结压力超过400 kPa时趋于稳定。其研究成果可为季冻区软土工程处理提供技术支持。
Aiming at the characteristics of wetland soft soil consolidation in Songnen Plain from Heilongjiang Prov-ince,compression and consolidation test study was carried out.Study showed that soft soil in seasonal frost area void ratio was large,water content was high,compression was strong,whose physical and mechanics properties and engineering prop-erties were better than the Pearl River Delta.With the consolidation pressure increasing,compression coefficient decreased and compression modulus increased gradually.When the consolidation pressure was above 200 kPa,the change trend of compression coefficient was gradually flat.With the consolidation pressure increasing,consolidation coefficient decreased gradually,the change range of which was 1.71 ～ 7.11 × 10-4 cm2 /s.Consolidation coefficient was tending towards stability when the consolidation pressure was above 400 kPa.The research results could provide technical support for soft soil engi-neering treatment in seasonal frost area.

引文

[1]程培峰,姜海洋,刘红军.寒区湿地软土固结变形特性试验研究[J].自然灾害学报,2007,16(2):82-85.
    [2]陈晓平,黄国怡,梁志松.珠江三角洲软土特性研究[J].岩石力学与工程学报,2003,22(1):137-141.
    [3]JTG E40-2007公路土工试验规程[S].
    [4]袁聚云,钱建固,张宏鸣,等.土质学与土力学[M].北京:人民交通出版社,2009.
    [5]刘红军.寒区湿地软土地基固结沉降与稳定性研究[D].哈尔滨:中国地震局工程力学研究所,2007.
    [6]于颜泉,李新年,邹小兵,等.碎石桩洁处理软土地基在公路工程中的应用[J].森林工程,2006,22(6):26-27.