基于现场浸水试验的大厚度马兰黄土湿陷性评价  

Collapsibility evaluation of thick Malan loess based on field immersion tests

作　　者：张森安 王小龙 张秦琦 时轶磊 Zhang Sen’an;Wang Xiaolong;Zhang Qinqi;Shi Yilei(Gansu CSCEC Municipal Engineering Investigation and Design Institute Co.,Ltd.,Lanzhou 730000,Gansu,China;CSCEC AECOM Consultants Co.,Ltd.,Lanzhou 730000,Gansu,China)

机构地区：[1]甘肃中建市政工程勘察设计研究院有限公司,甘肃兰州730000 [2]中国市政工程西北设计研究院有限公司,甘肃兰州730000

出　　处：《岩土工程技术》2025年第2期285-289,共5页Geotechnical Engineering Technique

基　　金：甘肃省建设科技攻关计划项目(JK2022-04);甘肃省科技计划资助(20JR10RA570)。

摘　　要：兰州地区工程建设场地向黄土梁峁区的大厚度湿陷性黄土地域扩展。兰州地区黄土湿陷特性的研究成果多集中于低阶地黄土状粉土,黄土梁峁区马兰黄土(Q_(3)^(eol))有别于低阶地区黄土状粉土。为合理地评价黄土梁峁马兰黄土地湿陷特性,以兰州地区黄土梁峁的马兰黄土(Q_(3)^(eol))为对象,基于现场浸水试验与室内试验成果,探讨兰州地区黄土梁峁的马兰黄土(Q_(3)^(eol))湿陷性变化特征,对比了现场浸水试验与室内试验计算湿陷量之间的差异,提出了兰州地区黄土梁峁的马兰黄土(Q_(3)^(eol))β0可采用1.0进行修正计算,为兰州地区黄土梁峁的马兰黄土(Q_(3)^(eol))场地湿陷性评价及地基处理设计提供参考。According to urban construction in Lanzhou,engineering construction sites are expanding to loess hilly and mound area with thick and collapsible loess.The research results on the collapsible characteristics of loess in Lanzhou are mainly focused on the loess silt with more low terrace engineering construction.Loess(Q_(3)^(eol))in loess hilly and mound area is different from loess silt in low terrace area.To reasonably evaluate the collapsibility characteristics of loess hilly and mound area Malan loess,Malan loess(Q_(3)^(eol))in Lanzhou was taken as the object,based on the field immersion test results and laboratory test results,the collapsibility change char-acteristics of Malan loess(Q_(3)^(eol))of loess hilly and mound in Lanzhou were discussed.The difference between the field immersion test and the laboratory test were compared,and theβ0 of loess(Q_(3)^(eol))of hilly and mound area in Lanzhou can be modified by 1.0 were put forward,which provides reference for the collapsibility evaluation and foundation treatment design of Malan loess(Q_(3)^(eol))in Lanzhou.

关 键 词：马兰黄土 现场浸水试验 湿陷性 室内试验 自重湿陷系数 

分 类 号：TU475[建筑科学—结构工程]