Effects of declining water levels on water-air interactions in cover collapse sinkhole

Xiao, Xianxuan; Li, Zhaofeng; Cai, Guanqiang; Yang, He

doi:10.1007/s10064-020-02089-y

Cited by 4 publications

(5 citation statements)

References 28 publications

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“…This study analyzes the susceptibility of KGS from three basic conditions: karst conditions (KCs), overburden conditions (OCs), and hydrodynamic conditions (HCs). Based on ignoring factors that have little impact on basic conditions, we further decompose basic conditions into six influencing factors: bedrock lithology (KC BL ), degree of karstification (KC DK ), thickness of overburden OC T , lithology and structure of overburden OC LS , distance between groundwater level and bedrock HC DLB , and variation in groundwater level HC VL [17,[50][51][52][53].…”

Section: Moshui Lake-south Lakementioning

confidence: 99%

The Analyses of Land Use and Prevention in High-Density Main Urban Areas under the Constraint of Karst Ground Subsidence: Study of Wuhan City, China

Gao,

Shi,

Qiu

et al. 2023

IJGI

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The development and utilization of land in the main urban area have significantly impacted the stability of the regional geological environment through various means, such as increased load and subway construction, primarily manifested as rock and soil mass deformation leading to geological hazards. Therefore, it is worth exploring how to reduce the occurrence of karst ground subsidence (KGS) through reasonable land development and control measures in the main urban areas with large-scale developments of buried karst formations. This study focuses on the main urban area of Wuhan City. An evaluation model for KGS was constructed using the analytic hierarchy process (AHP) and comprehensive index evaluation method by analyzing the geological conditions that affect KGS. The susceptibility zoning of KGS was obtained with GIS spatial analysis technology. The results show that the susceptible areas can be divided into extreme, high, medium, and weak susceptibility, accounting for 4.93%, 15.30%, 33.21%, and 46.56%, respectively, which are consistent with the distribution density of past KSGs. Furthermore, by selecting the subway construction as a human activity type, it indirectly discusses the influence of land development intensity on KGS. The results show that past KSGs are mainly concentrated in areas with high engineering construction density and significant land development intensity. Based on the above, strategies for regional land development and prevention and control of KGSs are proposed.

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Section: Moshui Lake-south Lakementioning

confidence: 99%

The Analyses of Land Use and Prevention in High-Density Main Urban Areas under the Constraint of Karst Ground Subsidence: Study of Wuhan City, China

Gao,

Shi,

Qiu

et al. 2023

IJGI

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“…Many scholars study the effect of groundwater level changes on soil cave collapse by carrying out physical model tests [14][15][16][17][18][19][20]; Xiao et al performed model tests to investigate the relationship between the relative strength degree and deformation of negative pressure suction and the effects of latent corrosion caused by water level changes. It reveals that the combined action of subsurface erosion and negative pressure absorption causes the mechanism of soil cave collapse [21,22]; Zhang et al and Hong et al carried out water level fluctuation experiments to study the response of soil cave deformation to water level fluctuations and the characteristics of soil cave evolution at each stage [23,24]. With the wide application of computers, numerical simulation was used to show the variation law of stress and displacement of the overlying soil during the change of water level [25][26][27][28].…”

Section: Introductionmentioning

confidence: 98%

Analysis of the Influence of Groundwater Level Fluctuation on Karst Soil Cave Collapse

2023

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Artificial water pumping and rainfall will induce groundwater level fluctuations, leading to large-scale karst collapse. Therefore, the combination of physical model test and FLAC3D numerical simulation is adopted to simulate the soil cave collapse caused by three different initial water level fluctuations in this paper. The influence of various initial water level heights on the variation of water-gas pressure, soil pressure of the overlying soil layer, and deformation in the existing soil cave during the fluctuation was analyzed. The relationship between initial water level height, deformation and collapse of the cave, and water-gas pressure was established, and the action law of water level fluctuations on the collapse of soil cave was introduced. The results show the following: (1) The change of water-gas pressure positively correlates with the initial water level height, directly affecting the overlying soil layer deformation. (2) The change of soil pressure of overlying soil positively correlates with the change of water-gas pressure under different initial water level fluctuations. (3) The deformation and collapse difficulty of the soil cave negatively correlates with the initial water level. The higher the initial water level, the stronger the negative pressure absorption and positive pressure gas explosion effect on the overburden on the soil cave and the collapse will occur with fewer water level fluctuations. (4) The numerical simulation results are consistent with the laboratory model test. These laws elucidate the change of water-gas pressure in different initial water level fluctuations and reveal the collapse mechanism of water level fluctuations. It will provide essential theoretical support for further research on the action law of hydrodynamic factors on karst collapse and a scientific and reasonable basis for urban groundwater pumping control, karst and roadbed collapse prevention and prediction.

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“…Özel and Darıcı measured the resistivity of rock formation, and they identified groundwater level variation, which is the main cause of the breakage of karst blocks . In addition, much research has analyzed the geological structure to assess the stability and engineering site based on geographic data. , …”

Section: Introductionmentioning

confidence: 99%

“…6 In addition, much research has analyzed the geological structure to assess the stability and engineering site based on geographic data. 30,31 The underground air−water pressure would be complicated after the construction of a reservoir built on a karst depression, which seals the natural air−water channel. To develop a monitoring system for the reservoir, a large-scale laboratory simulation test was carried out to study the air-pressure evolution and water migration process during water level fluctuation after the blockage of the sinkhole in a karst depression.…”

Section: Introductionmentioning

confidence: 99%

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Monitoring Methodology Study of a Reservoir Built on the Karst Depression: A Large Scale Laboratory Simulation Test

Chen

Zheng

et al. 2023

ACS Omega

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The karst depression with a natural negative landform is favorable for reservoir construction with less excavation work. The underground air–water pressure would be complicated after the construction of a reservoir that blocks the natural air–water channel (sinkhole, karst channel, etc.). To develop a monitoring system for the reservoir, a large-scale laboratory simulation test was carried out to study the air-pressure evolution and water migration process during water table fluctuation after the blockage of the sinkhole in a karst depression. The results are as follows. (1) The positive pressure jacking effect and the negative pressure sucking effect were observed in the karst channel and inside the model during groundwater table fluctuation. (2) A water imbibition test on the rock-like material was carried out with layered resistivity and layered NMR measurement. The relationship of resistivity and water saturation was developed based on Archie’s equation. (3) The resistivity evolution during the test was monitored using the high-density electronic resistivity imaging method. The resistivity of the measured profile was sensitive to the variation of the water level, and the water migration process was quantified by the resistivity to water saturation conversion. (4) The suitability of many techniques for monitoring a reservoir built on the karst depression was discussed. The resistivity monitoring technique combined with the air–water pressure monitoring technique could provide useful information for safety and reliability assessment.

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Effects of declining water levels on water-air interactions in cover collapse sinkhole

Cited by 4 publications

References 28 publications

The Analyses of Land Use and Prevention in High-Density Main Urban Areas under the Constraint of Karst Ground Subsidence: Study of Wuhan City, China

The Analyses of Land Use and Prevention in High-Density Main Urban Areas under the Constraint of Karst Ground Subsidence: Study of Wuhan City, China

Analysis of the Influence of Groundwater Level Fluctuation on Karst Soil Cave Collapse

Monitoring Methodology Study of a Reservoir Built on the Karst Depression: A Large Scale Laboratory Simulation Test

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