成都市含石膏、钙芒硝盐红层的特性及工程勘察问题探讨  

CHARACTERISTICS AND ENGINEERING INVESTIGATION ISSUES OF RED LAYER COMPRISING GYPSUM AND GLAUBERITE SALT IN CHENGDU CITY

作　　者：张小林[1] 余行健 江云 柴春阳[1] ZHANG Xiao-lin;YU Xing-jian;JIANG Yun;CHAI Chun-yang(China Railway Eryuan Engineering Group Co.,LTD.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《地质灾害与环境保护》2024年第2期64-70,共7页Journal of Geological Hazards and Environment Preservation

摘　　要：成都市含石膏、钙芒硝盐红层在环境水作用下产生不同程度的溶蚀作用,这种溶蚀作用下产生的环境水对地下构筑物产生硫酸盐腐蚀作用,从而引发工程问题。本文通过对成都市含石膏和钙芒硝盐红层的分布特征、物质成分、岩体结构构造和物理力学特性进行了研究和总结。研究发现,成都市的红层分布范围广,物质成分和岩体结构构造复杂。红层中包含有石膏与钙芒硝泥(或砂岩)、石膏与钙芒硝岩以及泥(或砂)质石膏与钙芒硝岩等不同类型的软岩,这些岩石的物理力学性质指标存在较大的离散性。红层泥岩、砂岩、石膏与钙芒硝岩均属软岩;石膏、钙芒硝岩的力学性质均在较大程度上优于泥岩。白云岩的力学性质均在较大程度上优于石膏、钙芒硝岩。此外,含石膏和钙芒硝盐的红层容易受溶蚀作用,产生溶洞或溶蚀孔。基于上述特点,本文探讨了成都市含石膏和钙芒硝盐红层相关的工程勘察问题。The red layer containing gypsum and glauberite Salt in Chengdu City produces different degree of dissolution under the action of environmental water, and the environmental water produced under the dissolution produces sulfate corrosion on underground structures,Which leads to engineering problems.This pape studies and summarizes the distribution characteristics, material composition, rock mass structure, and physical-mechanical properties of Red Layer comprising gypsum and glauberite Salt in Chengdu City. It is found that the red beds in Chengdu have a wide distribution range, complex material composition, and rock mass structure. The red beds contain gypsum and glauberite salt mudstone(or sandstone), gypsum and glauberite Salt rock, as well as clayey(or sandy) gypsum and glauberite salt rock. These rocks are all categorized as soft rocks, with significant variations in their physical-mechanical properties. Moreover, the gypsum and glauberite salt red beds are prone to dissolution, leading to the formation of sinkholes or dissolution cavities. Based on these characteristics, this paper discusses the engineering investigation issues related to Red Layer comprising gypsum and glauberite Salt in Chengdu City.

关 键 词：成都市 红层 石膏岩 钙芒硝岩 工程勘察 

分 类 号：P642[天文地球—工程地质学] P56[天文地球—地质矿产勘探] P583[天文地球—地质学] TU452[建筑科学—岩土工程]