Cone Penetration and Dilatometer Tests to Evaluate Stresses in a Soil-Bentonite Slurry Trench Cutoff Wall

IFCEE 2021 ◽  
2021 ◽  
Author(s):  
Jorge Romana-Giraldo ◽  
Daniel Ruffing ◽  
Timothy Guider ◽  
Benjamin Summers
Keyword(s):  
Cutoff Wall ◽  
Cone Penetration ◽  
Bentonite Slurry ◽  
Slurry Trench

Soil-Bentonite Slurry Trench Cutoff Wall Longevity

IFCEE 2018 ◽  
2018 ◽  
Author(s):  
Daniel Ruffing ◽  
Jeffrey Evans ◽  
Nathan Coughenour
Keyword(s):  
Cutoff Wall ◽  
Bentonite Slurry ◽  
Slurry Trench

scholarly journals Design and Evaluation of IoT-Enabled Instrumentation for a Soil-Bentonite Slurry Trench Cutoff Wall

2019 ◽  
Vol 4 (1) ◽  
pp. 5 ◽  
Author(s):  
Alan Marchiori ◽  
Yadong Li ◽  
Jeffrey Evans
Keyword(s):  
Real Time ◽  
Web Application ◽  
Time Series Data ◽  
Sensor Data ◽  
Series Data ◽  
Raspberry Pi ◽  
Transmission Protocol ◽  
Cutoff Wall ◽  
Bentonite Slurry ◽  
Slurry Trench

In this work, we describe our approach and experiences bringing an instrumented soil-bentonite slurry trench cutoff wall into a modern IoT data collection and visualization pipeline. Soil-bentonite slurry trench cutoff walls have long been used to control ground water flow and contaminant transport. A Raspberry Pi computer on site periodically downloads the sensor data over a serial interface from an industrial datalogger and transmits the data wirelessly to a gateway computer located 1.3 km away using a reliable transmission protocol. The resulting time-series data is stored in a MongoDB database and data is visualized in real-time by a custom web application. The system has been in operation for over two years achieving 99.42% reliability and no data loss from the collection, transport, or storage of data. This project demonstrates the successful bridging of legacy scientific instrumentation with modern IoT technologies and approaches to gain timely web-based data visualization facilitating rapid data analysis without negatively impacting data integrity or reliability. The instrumentation system has proven extremely useful in understanding the changes in the stress state over time and could be deployed elsewhere as a means of on-demand slurry trench cutoff wall structural health monitoring for real-time stress detection linked to hydraulic conductivity or adapted for other infrastructure monitoring applications.

Non-monotonic piezocone dissipation curves of backfills in a soil-bentonite slurry trench cutoff wall

2018 ◽  
Vol 19 (4) ◽  
pp. 277-288 ◽  
Author(s):  
Yu-chao Li ◽  
Xing Tong ◽  
Yun Chen ◽  
Han Ke ◽  
Yun-min Chen ◽  
...  
Keyword(s):  
Cutoff Wall ◽  
Bentonite Slurry ◽  
Slurry Trench

Effect of Phosphate Dispersant Amendment on Workability of Ca-Bentonite Slurry for Slurry Trench Cutoff-Wall Construction

2017 ◽  
Vol 47 (4) ◽  
pp. 445-452 ◽  
Author(s):  
Yu-Ling Yang ◽  
Yan-Jun. Du ◽  
Krishna R. Reddy ◽  
Ri-Dong Fan
Keyword(s):  
Cutoff Wall ◽  
Bentonite Slurry ◽  
Slurry Trench ◽  
Wall Construction

Laboratory test results on self-hardening grouts for flexible cutoffs

1984 ◽  
Vol 21 (1) ◽  
pp. 185-191 ◽  
Author(s):  
Robert P. Chapuis ◽  
J.-Jacques Paré ◽  
André A. Loiselle
Keyword(s):  
Experimental Program ◽  
Test Results ◽  
James Bay ◽  
Cement Slurry ◽  
Cutoff Wall ◽  
Hydroelectric Project ◽  
Solid States ◽  
Bentonite Slurry ◽  
Laboratory Test Results ◽  
Cutoff Walls

The addition of cement to a bentonite slurry gives a complex material called self-hardening grout which slowly sets to become a clay-like solid. The properties of these mixes are highly dependent on the bentonite and the cement used. Most information available up to now comes from European countries where the technique has been developed. As very little information was available about such mixes in North America, an experimental program was initiated to study their applicability for cutoff walls of certain dams of the James Bay hydroelectric project. The present paper describes the characteristics of different mixes tested in their fluid and solid states. Keywords: bentonite, cement, slurry, cutoff wall.

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