Next Article in Journal
Comparative Biomechanical Analysis of the Hurdle Clearance Technique of Colin Jackson and Dayron Robles: Key Studies
Next Article in Special Issue
Influence of Tunnel Boring Machine (TBM) Advance on Adjacent Tunnel during Ultra-Rapid Underground Pass (URUP) Tunneling: A Case Study and Numerical Investigation
Previous Article in Journal
Fracture Damage Properties of SBS-Modified Asphalt Mixtures Reinforced with Basalt Fiber after Freeze-Thaw Cycles Using the Acoustic Emission Approach
Previous Article in Special Issue
Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite
Open AccessFeature PaperArticle

Effects of Soil Conditioning on Characteristics of a Clay-Sand-Gravel Mixed Soil Based on Laboratory Test

by 1,2,3,*, 2, 2 and 1
1
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
2
AVIC Institute of Geotechnical Engineering Co., LTD., Beijing 100098, China
3
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(9), 3300; https://doi.org/10.3390/app10093300
Received: 22 April 2020 / Revised: 7 May 2020 / Accepted: 7 May 2020 / Published: 9 May 2020
(This article belongs to the Special Issue Advances in Geotechnical Engineering)
Soil conditioning is of great significance for tunneling in soft ground with earth pressure balance shield (EPBS) machines, which leads to safe, highly efficient, and high-quality tunneling. To study the effects of soil conditioning on properties of a clay-sand-gravel mixed soil encountered in an EPBS tunneling project in Beijing, a series of geotechnical test methods was carried out based on laboratory test in this paper. The decay behaviors of foam particles generated by the Waring-Blender method were studied first using the image particle analysis system, and then the feasibility of soil conditioning on the mixed soil was qualitatively and quantitatively assessed through the mixing test, slump test, and friction coefficient test. The preliminary test results indicate that drainage of water in liquid film plays an important role in the decay of foam microstructure. The viscosity and flowability of the conditioned soil were modified dramatically by using various amount of water and foam, and a suitable state meeting the requirement of EPBS machines was obtained. The net power and mixing time, which reflects the interaction between the blending rods and tested soils, as well as the slump value, providing the overall indication for liquidity of the conditioned soils, and friction coefficient, reflecting the friction between steel and tested soils, were used to provide insight into the variation in viscosity and flowability of the tested soils. View Full-Text
Keywords: soil conditioning; feasibility; mixed soil; earth pressure balance shield soil conditioning; feasibility; mixed soil; earth pressure balance shield
Show Figures

Figure 1

MDPI and ACS Style

Wei, Y.; Wang, D.; Li, J.; Jie, Y. Effects of Soil Conditioning on Characteristics of a Clay-Sand-Gravel Mixed Soil Based on Laboratory Test. Appl. Sci. 2020, 10, 3300. https://doi.org/10.3390/app10093300

AMA Style

Wei Y, Wang D, Li J, Jie Y. Effects of Soil Conditioning on Characteristics of a Clay-Sand-Gravel Mixed Soil Based on Laboratory Test. Applied Sciences. 2020; 10(9):3300. https://doi.org/10.3390/app10093300

Chicago/Turabian Style

Wei, Yingjie; Wang, Duli; Li, Jianguang; Jie, Yuxin. 2020. "Effects of Soil Conditioning on Characteristics of a Clay-Sand-Gravel Mixed Soil Based on Laboratory Test" Appl. Sci. 10, no. 9: 3300. https://doi.org/10.3390/app10093300

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop