Next Article in Journal / Special Issue
A New Pseudo Steady-State Constant for a Vertical Well with Finite-Conductivity Fracture
Previous Article in Journal
Modeling and Optimal Design of Absorbent Enhanced Ammonia Synthesis
Previous Article in Special Issue
Investigation of the Porosity Distribution, Permeability, and Mechanical Performance of Pervious Concretes
Article

Critical Hydraulic Gradient of Internal Erosion at the Soil–Structure Interface

School of Civil Engineering, Shandong University, 17922, Jingshi Road, Jinan 250061, China
*
Authors to whom correspondence should be addressed.
Processes 2018, 6(7), 92; https://doi.org/10.3390/pr6070092
Received: 25 June 2018 / Revised: 13 July 2018 / Accepted: 16 July 2018 / Published: 18 July 2018
(This article belongs to the Special Issue Fluid Flow in Fractured Porous Media)
Internal erosion at soil–structure interfaces is a dangerous failure pattern in earth-fill water-retaining structures. However, existing studies concentrate on the investigations of internal erosion by assuming homogeneous materials, while ignoring the vulnerable soil–structure-interface internal erosion in realistic cases. Therefore, orthogonal and single-factor tests are carried out with a newly designed apparatus to investigate the critical hydraulic gradient of internal erosion on soil–structure interfaces. The main conclusions can be draw as follows: (1) the impact order of the three factors is: degree of compaction > roughness > clay content; (2) the critical hydraulic gradient increases as the degree of compaction and clay content increases. This effect is found to be more obvious in the higher range of the degree of soil compaction and clay content. However, there exists an optimum interface roughness making the antiseepage strength at the interface reach a maximum; (3) the evolution of the interface internal erosion develops from inside to outside along the interface, and the soil particles at the interface flow as a whole; and (4) the critical hydraulic gradient of interface internal erosion is related to the shear strength at the interface and the severity and porosity of the soil. View Full-Text
Keywords: soil–structure interface; internal erosion; critical hydraulic gradient; orthogonal tests soil–structure interface; internal erosion; critical hydraulic gradient; orthogonal tests
Show Figures

Figure 1

MDPI and ACS Style

Xie, Q.; Liu, J.; Han, B.; Li, H.; Li, Y.; Li, X. Critical Hydraulic Gradient of Internal Erosion at the Soil–Structure Interface. Processes 2018, 6, 92. https://doi.org/10.3390/pr6070092

AMA Style

Xie Q, Liu J, Han B, Li H, Li Y, Li X. Critical Hydraulic Gradient of Internal Erosion at the Soil–Structure Interface. Processes. 2018; 6(7):92. https://doi.org/10.3390/pr6070092

Chicago/Turabian Style

Xie, Quanyi, Jian Liu, Bo Han, Hongtao Li, Yuying Li, and Xuanzheng Li. 2018. "Critical Hydraulic Gradient of Internal Erosion at the Soil–Structure Interface" Processes 6, no. 7: 92. https://doi.org/10.3390/pr6070092

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
Back to TopTop