四川某天坑形成条件试验分析  

Conditions that Dolines Formed

作　　者：韦璐[1,2] 杨玉娟[3] 钟君叶[1,2] 贺宇航[1,2] 

机构地区：[1]成都理工大学环境与土木工程学院,成都610059 [2]成都理工大学国家级地质工程实验教学示范中心,成都610059 [3]中国水电顾问集团成都勘测设计研究院,成都610072

出　　处：《土工基础》2012年第5期63-64,101,共3页Soil Engineering and Foundation

摘　　要：对四川大邑新场与崇州怀远两处天坑土体的物理化学性质进行了研究,主要包括比重试验、级配试验、液塑限试验和土样化学性质测试,分析表明,两处天坑的形成并非由于下覆碳酸盐岩溶洞导致上覆土体缺乏承载力所致,而多与地下水的扰动有关。＂Doline＂ collapses are one of the frequent geological hazards.This paper presents the physical and chemical properties of soils from two recent collapses： Xinchang Doline of Dayi and Huaiyuan Doline of Congzhou.The specific gravity,grain size distribution,Atterberg limits and chemical properties of the soil samples were examined.The research results indicate that the two collapses were not due to bearing loss from the formation of underlying carbonate cavity.The disturbance of groundwater at both locations are the likely reasons.

关 键 词：天坑 地表塌陷 物理化学性质 级配试验 液塑限试验 

分 类 号：TU411[建筑科学—岩土工程]