Results 21 to 30 of about 39,029 (254)

Real-Time Pore Pressure Detection: Indicators and Improved Methods

Geofluids, 2017
High uncertainties may exist in the predrill pore pressure prediction in new prospects and deepwater subsalt wells; therefore, real-time pore pressure detection is highly needed to reduce drilling risks.
Jincai Zhang, Shangxian Yin
doaj   +1 more source

Preliminary study on real-time pore water pressure response and reinforcement mechanism of air-booster vacuum preloading treated dredged slurry

Rock and Soil Mechanics, 2020
Laboratory tests have been carried out for simulating dredged-slurry treatment combining air-booster and conventional vacuum preloading methods. Settlement plate, micro pore water pressure transducer and miniature vane shearing instrument are adopted for
SHI Li, HU Dong-dong, CAI Yuan-qiang, PAN Xiao-dong, SUN Hong-lei   +4 more
doaj   +1 more source

Chemical Evolution of Pore Solution in Metakaolin Concrete During Water Evaporation

Medžiagotyra, 2023
Metakaolin concrete is a kind of porous material, which contains a variety of chemical ions in the pores. Solutions in these pores are exposed to the atmosphere and exist evaporation and condensation processes, therefore, the pore solution volume of ...
Xuebing WANG, Shengbo GUO
doaj   +1 more source

A vacuum-refilled tensiometer for deep monitoring of in-situ pore water pressure [PDF]

Scientia Iranica, 2018
Real-time measurement of soil water pressure has been recognized as an essential part of investigating water flow in unsaturated soils. Tensiometry, amongst different measuring techniques, is a common method for direct evaluation of water pressure. However, the lower limit of measurable water pressure by a conventional tensiometer becomes even more ...
Sadeghi, Hamed, Chiu, Abraham C. F., Ng, Charles Wang Wai, Jafarzadeh, Fardin   +3 more
openaire   +2 more sources

Pore Pressure Monitoring in a Chalk Gas Reservoir Using Surface-Wave Velocity Variations

First EAGE/SBGf Workshop on Reservoir Monitoring and its Role in the Energy Transition, 2022
Measurements of pore pressure variations contain important information for the production of hydrocarbon reservoirs. Here, we couple surface-wave velocity changes directly to pore pressure change using sensitivity kernels. Using these kernels for realistic pore pressure changes in the Harlingen chalk gas reservoir, we modelled yearly Rayleigh-wave ...
Fokker, Eldert, Ruigrok, Elmer, Hawkins, Rhys, Trampert, Jeannot   +3 more
openaire   +2 more sources

Field Test of Excess Pore Water Pressure at Pile–Soil Interface Caused by PHC Pipe Pile Penetration Based on Silicon Piezoresistive Sensor

Sensors, 2020
Prestressed high-strength concrete (PHC) pipe pile with the static press-in method has been widely used in recent years. The generation and dissipation of excess pore water pressure at the pile–soil interface during pile jacking have an important ...
Yonghong Wang, Xueying Liu, Mingyi Zhang, Suchun Yang, Songkui Sang   +4 more
doaj   +1 more source

Field test and analysis of pore pressure in clay-limestone foundation

Yantu gongcheng xuebao
The key to anti-floating design of underground structures lies in clarifying the variation pattern of pore pressure. Relying on the subway project, a monitoring plan is formulated, with water level and meteorological monitoring points set up around the ...
SONG Linhui 1, ZHENG Guohao 1, YANG Tianjiao 1, ZHANG Jingxuan 1, LI Zhiming 2, MEI Guoxiong 3
doaj   +1 more source

Influences of antecedent rainfall and change of reservoir water level on seepage and stability characteristics of earth rock dams

Yantu gongcheng xuebao, 2022
The climate change has brought unprecedented challenges to the safe operation and management of reservoir dams. The antecedent rainfall and change of reservoir water level are the key factors affecting the instability of reservoir dam slopes, and the ...
LI Zhuo 1, 2, FANG Yi-xiang 1, LU Yang 3, LIU Kang 4, ZHANG Yong-gan 3
doaj   +1 more source

Value of information of combinations of proof loading and pore pressure monitoring for flood defences [PDF]

Structure and Infrastructure Engineering, 2020
Spatial variability and limited measurements often result in low reliability estimates of geotechnical failure modes of dikes (i.e., earthen flood defences). Required dike reinforcements are usually not executed within a few years after inception, which enables efforts to improve reliability estimates by reducing uncertainty.
Mark G. van der Krogt, Wouter J. Klerk, Wim Kanning, Timo Schweckendiek, Matthijs Kok   +4 more
openaire   +3 more sources

Comparison of K-means and FCM algorithms to optimize spatiotemporal pore pressure prediction of earth dams

Results in Engineering
To identify the behavior and health monitoring of dams, it is necessary to correctly interpret the results of instrumentation in different phases of construction, impounding, and operation.
Behrang Beiranvand, Taher Rajaee, Mehdi Komasi   +2 more
doaj   +1 more source