基于静力触探测试的深厚自重黄土场地湿陷性快速评价方法研究  

STUDY ON RAPID EVALUATION OF SELF-WEIGHT COLLAPSIBILITY OF DEEP LOESS BASED ON STATIC PROBE TEST

作　　者：张天林 刘德仁[2] 李青 程富强 李保金 徐硕昌 张严 ZHANG Tianlin;LIU Deren;LI Qing;CHENG Fuqiang;LI Baojin;XU Shuochang;ZHANG Yan(Zhongwei to Lanzhou Railway Passenger Dedicated Line Co.,Ltd.,Baiyin 730900,China;Lanzhou Jiaotong University,Lanzhou 730070,China;China Railway Fifth Survey And Design Institute Group Co.,Ltd.,Beijing 102600,China)

机构地区：[1]中兰铁路客运专线有限公司,中国白银730900 [2]兰州交通大学,中国兰州730070 [3]中铁第五勘察设计院集团有限公司,中国北京102600

出　　处：《工程地质学报》2023年第5期1767-1773,共7页Journal of Engineering Geology

基　　金：国家自然科学基金(资助号:41662017);兰州市科技计划项目(资助号:2018-4-33).

摘　　要：湿陷性是制约黄土场地工程建设的最主要因素。针对黄土场地现场浸水试验测试时间长、成本高等问题,在兰州新区黄土场地和靖远黄河高阶地黄土场地进行静力触探试验,研究静力触探锥尖阻力、锥侧阻力沿土层深度的变化关系,并在现场取原状黄土试样进行室内湿陷试验,研究发现室内试验所测得的自重湿陷系数沿深度具有良好的线性关系,由此建立了静力触探所测锥尖、锥侧阻力与自重湿陷系数之间的联系,提出了一种通过静力触探试验结果快速评价黄土场地自重湿陷性的方法。基于上述方法,对兰州新区和靖远黄河阶地黄土场地其他点位的测试结果进行自重湿陷性评价,验证了该方法的可行性与准确性。This paper carries out the static cone peneration test in the New District in Lanzhou loess ground and the Jingyuan Yellow River high terrace loess area.It examines the taper cone tip resistance relation between frictional resistance along the depth of soil layer.It takes the original state collapsibility loess samples for indoor test.It is found that the coefficient of self-weight collapsibility measured in laboratory tests has a good linear relationship along the depth,and the relationship between the cone tip resistance and the cone side resistance.The coefficient of self-weight collapsibility measured by static penetration test is established.A method for rapidly evaluating self-weight collapsibility of loess site is put forward based on the results of static penetration test.Based on the above studies,the self-weight collapsibility of loess sites in the Jingyuan Yellow River terrace and Lanzhou New Area is evaluated,and the feasibility and accuracy of the method are verified.

关 键 词：深厚黄土场地 室内湿陷性试验 静力触探 湿陷性评价 

分 类 号：TU444[建筑科学—岩土工程]