Results 71 to 80 of about 521,250 (248)

Development of a Sinkhole Raveling Chart Based on Cone Penetration Test (CPT) Data [PDF]

open access: yes, 2018
Naturally occurring sinkholes in Florida are formed when the soluble limestone bedrock weathers and creates cavities at its interface with the overburden finer-grained soils. The overburden soil then erodes into the limestone fissures, thus weakening the
Shamet, Ryan   +2 more
core   +1 more source

Influencing factors and formation mechanism of covered karst collapse in Liujiazhuang, Qufu City

open access: yesCarsologica Sinica
By the end of 2019, four karst collapses had occurred in Liujiazhuang village, Qufu City, resulting in seven collapse points that caused damage to houses and farmland, ultimately leading to the relocation of the entire village.
Yaohua GUO   +9 more
doaj   +1 more source

Physical and Chemical Controls on Suffosion Development in Gypsic Soil, Culberson County, Texas [PDF]

open access: yes, 2018
In the Gypsum Plain, suffosion processes have encouraged road failure through dissolution and transport of gypsic soils; however, no prior research has been conducted within the Delaware Basin in regard to these processes.
Morris, Jonah
core   +1 more source

Genetic models and influence factors of karst collapses in Loudi City of central Hunan, China

open access: yesCarsologica Sinica
Loudi City in central Hunan has recorded 281 karst collapse incidents and tens of thousands of collapse pits, which made it one of the cities in China experiencing the most serious karst collapses.
Jiehua GUO   +4 more
doaj   +1 more source

Dynamic Risk Assessment of Karst Tunnel Collapse Based on Fuzzy-AHP: A Case Study of the LianHuaShan Tunnel, China

open access: yesAdvances in Civil Engineering, 2022
Tunnel collapse in the karst tunnel occurs suddenly. Dynamic risk assessment for tunnel collapse is more accurate than static analysis, which is not enough at the stage. The study designs a new questionnaire to establish dynamic risk assessment for karst
Yongyan Yu   +4 more
doaj   +1 more source

New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea) [PDF]

open access: yes, 2015
The large palaeosinkholes located in the NW of Gozo (central Mediterranean Sea, Malta) offer excellent exposures that provide information on the geometry and kinematics of large karst-related collapse structures.
Galve, J. P.   +5 more
core   +1 more source

Seepage-induced sand-leakage karst collapse mechanism considering the soil arching effect

open access: yesShuiwen dizhi gongcheng dizhi
Sand-leakage karst collapse often occurs in the hidden karst area of the binary structure covering layer due to seepage. However, further research is needed to understand the macro and micro mechanical mechanisms of such collapse and the mechanical ...
Xu GAO   +4 more
doaj   +1 more source

Evaporite karst geohazards in the Delaware Basin, Texas: review of traditional karst studies coupled with geophysical and remote sensing characterization [PDF]

open access: yes, 2017
Evaporite karst throughout the Gypsum Plain of west Texas is complex and extensive, including manifestations ranging from intrastratal brecciation and hypogene caves to epigene features and suffosion caves.
Brown, Wesley A.   +4 more
core   +1 more source

Ostracode-based aminostratigraphy and aminochronology of a tufa system in central Spain [PDF]

open access: yes, 2005
In the Priego area, central Spain, extensive tufa deposits are located in three small tributaries located at the head of the 1000 kmlong Tagus River. The deposits are originated after karst-origin running waters emerged from the confines of the canyons ...
Andrews   +46 more
core   +2 more sources

Numerical simulation of critical flow velocity in the covered karst soil cave formation

open access: yesShuiwen dizhi gongcheng dizhi
The covered karst collapse has the characteristics of concealment, suddenness, uncertainty, and mechanism complexity, which leads to its prevention and treatment more difficult. In the process of covered karst collapse, soil caves formed in the overlying
Xiaoxi CHEN, He HUANG, Yan ZHU, Bin ZENG
doaj   +1 more source

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