Experimental research on mechanical property of granite under erosion by seawater. Issue 3 (October 2020)

• Record Type: Journal Article
• Authors: Zhang, C H; Zhang, Q; Liu, J; Tian, L G; Dai, G L
• Is Part Of: IOP conference series. Volume 570:Issue 3(2020)
• Publication Date: 2020-10
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/570/3/032040
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: When offshore rock-socketed foundations are constructed, seawater will deteriorate the mechanical properties of fresh granite at the excavation surface of the foundation, thereby reducing the bedrock bearing capacity of the granite. In this paper, elastic P-wave velocity, uniaxial compressive strength, and slake durability tests are used to study the deterioration of the mechanical properties of granite due to seawater. The time effect is also considered by using different immersion durations (3, 7, and 15 days). The results indicate that the mechanical properties of granite deteriorate with an increase in erosion time. After being eroded in seawater for 15 days, dried samples have an elastic P-wave velocity of 4.274 km/s, saturated samples have a uniaxial compressive strength of 68.196 MPa, and the slake durability index is 84.24%. An evident decline is seen in the mechanical properties of granite under the effect of seawater erosion compared with the initial values of each index parameter. Thus, the influence of seawater erosion on rock-socketed foundations needs to be considered.