工程地质学报2026，Vol.34Issue(3)：1060-1072,13.DOI:10.13544/j.cnki.jeg.2024-0274
渝东北巴东组滑坡结构特征与力学特性研究
STUDY ON THE STRUCTURES AND MECHANICAL CHARACTERISTICS OF THE LANDSLIDES IN THE BADONG FORMATION IN NORTHEAST-ERN CHONGQING
摘要
Abstract
Landslides in the Badong Formation have long posed a significant threat to geological safety in north-eastern Chongqing.To analyze the microscopic mechanisms underlying landslide evolution,field investigations,X-ray diffraction(XRD)tests,rock mass expansion tests,and disintegration tests were conducted to examine the distribution patterns,microscopic structures,and mechanical properties of Badong Formation landslides in Wushan County.The results reveal the following key findings:(1)Landslides in the study area are closely associated with the distribution of Badong Formation strata,with the second layer(T2b2)and third layer(T2b3)being the most prone to landsliding,accounting for approximately 71％of all landslides in the formation.(2)Landslides in the Badong Formation typically exhibit a layered sliding pattern,where the second layer(T2b2)slides along the first layer(T2b1),and the fourth layer(T2b4)slides along the third layer(T2b3).Sliding surfaces predominantly develop within weak rock layers near strata contact interfaces,with significant variations in clay mineral content between the upper and lower strata of the sliding surface.(3)The swelling force induced by water absorption in the Badong Formation rock mass has minimal influence on oblique(edge)failure.The typical soft rocks in the first and fourth layers exhibit greater resistance to disintegration compared to those in the second and third layers.(4)After rainfall,the overall stability of Badong Formation landslides is more closely related to changes in the internal friction angle of the sliding zone soil than to variations in relative cohesion.This study provides a theoretical foundation for the prevention and control of landslides in the Badong Formation.关键词
滑坡/巴东组/微观结构/力学特征Key words
Landslide/Badong formation/Microscopic structures/Mechanical characteristics分类
天文与地球科学引用本文复制引用
黄浩,曾玉,吕玉香,张枝华..渝东北巴东组滑坡结构特征与力学特性研究[J].工程地质学报,2026,34(3):1060-1072,13.基金项目
巫山县科技局项目(资助号:wskjxm),重庆市地质矿产开发局重点项目(资助号:DKJ-2024-208-B-003),重庆地矿局开放基金项目(资助号:208-KC-202310).This research is supported by the Chongqing Wushan County Science and Technology Bureau Project(Grant No.wskjxm),The Key Projects of the Chongqing Geology and Mineral Development Bureau(Grant No.DKJ-2024-208-B-003)and Chongqing Geology and Mineral Development Bureau Open Fund(Grant No.208-KC-202310). （资助号:wskjxm）
