Skip to main content
SpringerLink
Log in

Study on shear characteristics and a mechanics model of granite residual soil–rock interface

  • Original Paper
  • Published:
Bulletin of Engineering Geology and the Environment Aims and scope Submit manuscript

Abstract

Granite binary structure slopes and residual soil slopes containing spheroidal boulders formed by differential weathering are widely distributed along the southeast coast of China. Field studies demonstrate that the failure of differentially weathered granite slopes mainly occurs at soil–rock interfaces. Only few studies have been conducted on the shear characteristics of the interfaces between rocks and granite residual soil. Moreover, mechanics models describing the engineering properties of the interfaces have not been developed. In this study, the ring shear tests are conducted on a granite residual soil–rock interface using the orthogonal design method and considering factors such as the roughness of granite, water content and initial dry density, shear rate, and number of drying–wetting cycles. A mechanics model that can precisely demonstrate the shear characteristics of the interface is also developed, and its validity is verified using test results. The findings indicate that the roughness of granite and the water content of the residual soil are the main factors affecting the interface shear stress. As the increase of granite roughness, the peak internal friction angle, residual internal friction angles, and peak cohesion of soil–rock interface increase. The residual cohesion of the interface, however, decreases as the roughness of granite increases. As the water content of the soil increases, both the interface shear stress and internal friction angle initially start to increase and then decrease. With the increase of the number of drying–wetting cycles, the internal friction angle and peak cohesion of the interface decrease.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Fig. 18
Fig. 19
Fig. 20

Similar content being viewed by others

Data availability

All data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.

Abbreviations

R a :

Roughness

m 1 :

The granite sample mass on the lower surface

m 1 :

The granite sample mass on the upper surface

r 1 and r 2 :

The outer and inner diameters of the granite samples

h :

The height of the granite samples

S :

The surface area of the upper part of the granite samples

\(\overline{S_{p1}}, \overline{S_{p2}}, \overline{S_{p3}}, \overline{S_{p4}}\)  :

The peak shear stress of the interface under each factor

\(\overline{S_{r1}}, \overline{S_{r2}}, \overline{S_{r3}}, \overline{S_{r4}}\)  :

The corresponding average value of the residual shear stress

R p :

The range value of the peak shear stress

R r :

The average difference of the residual shear stress

w :

Water content

ρ :

Initial dry density

v :

Shear rate

φ p :

Peak internal friction angle

c p :

Peak cohesive strength

φ r :

Residual internal friction angle

c r :

Residual cohesion

τ :

Shear stress

u :

Shear displacement

E t :

Tangent modulus

E i :

Initial tangent modulus

τ ult :

Ultimate shear force

R f :

Damage ratio

p a :

Atmospheric pressure

τ f :

Shear stress under a particular displacement

σ n :

Normal stress

K, n, a, and  b :

Test parameters

\(k_p,\ k_r, k_s\) :

Shear modulus

References

Download references

Funding

This study received financial support from the National Natural Science Foundation of China (No. 42007235, No. U2005205, No. 41972268) and the Science and Technology Innovation Platform Project of Fuzhou Science and Technology Bureau (No. 2021-P-032).

Author information

Authors and Affiliations

  1. Zijin School of Geology and Mining, Fuzhou University, Fuzhou, Fujian, 350108, China

    Hong-qiang Dou, Sen-hua Xie, Feng Chen, Hao Wang & Wen-bin Jian

  2. Fujian Key Laboratory of Geohazard Prevention, Fuzhou, Fujian, 350002, China

    Hong-qiang Dou, Hao Wang & Wen-bin Jian

  3. College of Civil Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China

    Fu-quan Chen

Authors
  1. Hong-qiang Dou
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Sen-hua Xie
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Feng Chen
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Hao Wang
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Fu-quan Chen
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Wen-bin Jian
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Hao Wang.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Dou, Hq., Xie, Sh., Chen, F. et al. Study on shear characteristics and a mechanics model of granite residual soil–rock interface. Bull Eng Geol Environ 82, 212 (2023). https://doi.org/10.1007/s10064-023-03220-5

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s10064-023-03220-5

Keywords

Search

Navigation