刘伟, 陈勇. 2014: 山西洪洞恒富铁路专用线黄土特性及工程措施. 工程地质学报, 22(s1): 117-121. DOI: 10.13544/j.cnki.jeg.2014.s1.021
    引用本文: 刘伟, 陈勇. 2014: 山西洪洞恒富铁路专用线黄土特性及工程措施. 工程地质学报, 22(s1): 117-121. DOI: 10.13544/j.cnki.jeg.2014.s1.021
    Liu Wei, Chen Yong. 2014: LOESS CHARACTERISTICS AND ENGINEERING MEASURES OF HENGFU SPECIAL RAILWAY IN SHANXI HONGTONG. JOURNAL OF ENGINEERING GEOLOGY, 22(s1): 117-121. DOI: 10.13544/j.cnki.jeg.2014.s1.021
    Citation: Liu Wei, Chen Yong. 2014: LOESS CHARACTERISTICS AND ENGINEERING MEASURES OF HENGFU SPECIAL RAILWAY IN SHANXI HONGTONG. JOURNAL OF ENGINEERING GEOLOGY, 22(s1): 117-121. DOI: 10.13544/j.cnki.jeg.2014.s1.021

    山西洪洞恒富铁路专用线黄土特性及工程措施

    LOESS CHARACTERISTICS AND ENGINEERING MEASURES OF HENGFU SPECIAL RAILWAY IN SHANXI HONGTONG

    • 摘要: 恒富铁路专用线处于山西洪洞汾河流域高阶地,黄土问题是该项目的主要工程地质问题。沿线共发育3层黄土,为冲洪积成因,时代分别为第四纪全新世晚期(Q42)、全新世早期(Q41)和晚更新世(Q3)。3层黄土均为砂质黄土,属中硬土,具有天然重度低、天然孔隙比大、天然含水量小、液限及塑限低、塑性指数及液性指数小、饱和度低、压缩系数较大、波速较高、抗剪强度及承载力一般等特点。其中第1层和第2层黄土指标接近,为湿陷性黄土; 第3层黄土指标明显较好,为非湿陷性黄土。该场地为自重湿陷性场地。黄土的湿陷性与其物理力学指标关系密切。黄土的湿陷性对桥梁和路基工程影响较大,需针对不同的工程及黄土的特性采取相应的基础类型和地基处理措施。取样方式的不同对湿陷性黄土指标和性质的影响很大,湿陷性黄土应采用试坑手工取样。

       

      Abstract: Hengfu special railway is located in high terrace in Shanxi Hongtong Fenhe valley., Loess is the main engineering geological problem of this project. There are three layer of loess, Alluvial and diluvial causes and age of late quaternary holocene(Q42), the early Holocene (Q41) and late pleistocene(Q3). Three layers are sandy loess, which belong to the hard soil, with low natural gravity, natural void ratio, less natural water content and low liquid limit and plastic limit, small plasticity index and liquidity index, low saturation, large compression coefficient, high velocity, shear strength and bearing capacity of general characteristics. Physical and mechanical indexes of layer 1 and layer 2 loess are close, which are collapsible loess. The indexes of layer 3 are better, not collapsible loess. The field is self collaspsibility. The collapsibility of loess and natural gravity, natural void ratio, natural water content, liquid limit, saturation and shear wave velocity indexes have close relations. The loess collapsibility has larger influence on bridge and roadbed engineering. It should take different foundation type and treatment measures for different project and loess. The different methods of sampling have great influences on the collapsible loess indexes and characteristics, collapsible loess trial pit manual sampling should be adopted.

       

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