A Modified Model for Predicting the Strength of Drying-Wetting Cycled Sandstone Based on the P-Wave Velocity

doi:10.3390/su12145655

	A Modified Model for Predicting the Strength of Drying-Wetting Cycled Sandstone Based on the P-Wave Velocity
	Xu, Zhi-Hua 3; Feng, Guang-Liang 1; Sun, Qian-Cheng 3; Zhang, Guo-Dong 3; He, Yu-Ming 2
刊名	SUSTAINABILITY
	2020-07-01
卷号	12 期号:14 页码:17
关键词	hydro-fluctuation belt drying-wetting cycles sandstone rock strength prediction wave velocity
DOI	10.3390/su12145655
英文摘要	The drying-wetting cycles caused by operation of the Three Gorges Reservoir have considerable effect on the deterioration of reservoir bank rock mass, and the degradation of reservoir rock mass by the drying-wetting cycle is becoming obvious and serious along with the periodic operation. At present, the strength of the rock prediction research mainly focuses on the uniaxial strength, and few studies consider the drying-wetting effect and confining pressure. Therefore, in this paper, typical sandstone from a reservoir bank in the Three Gorges Reservoir area is taken as the research object, while the drying-wetting cycle test, wave velocity test and strength test are carried out for the research on the strength prediction of sandstone under the action of the drying-wetting cycle. The results show that the ultrasonic wave velocityVpof the sandstone has an exponential function relation with the drying-wetting cycle numbern, and the initial stage of drying-wetting cycles has the most significant influence on the wave velocity. Under different confining pressures, the compressive strength of sandstone decreases linearly with the increase of the drying-wetting cycle numbers, and the plastic deformation increases gradually. The damage variable of the sandstone has a power function relation with the increase of drying-wetting cycle numbers. A traditional strength prediction model based on P-wave velocity was established combined with the damage theory and Lemaitre strain equivalence hypothesis; in view of the defects of the traditional strength prediction model, a modified model considering both the drying-wetting cycle number and confining pressures was proposed, where the calculated results of the modified model are closer to the test strength value, and the prediction error is obviously decreased. This indicated that the modified model considering the drying-wetting cycle number and confining pressure is reasonable and feasible.
资助项目	Young Talents Development Plan of Hubei province
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
语种	英语
出版者	MDPI
WOS记录号	WOS:000554825100001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24577]
专题	中科院武汉岩土力学所
通讯作者	Feng, Guang-Liang; Sun, Qian-Cheng
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Hydrogeol & Engn Geol Reconnaissance Inst Hubei P, Yichang 443000, Peoples R China 3.China Three Gorges Univ, Natl Field Observat & Res Stn Landslides Three Go, Yichang 443002, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhi-Hua,Feng, Guang-Liang,Sun, Qian-Cheng,et al. A Modified Model for Predicting the Strength of Drying-Wetting Cycled Sandstone Based on the P-Wave Velocity[J]. SUSTAINABILITY,2020,12(14):17.
APA	Xu, Zhi-Hua,Feng, Guang-Liang,Sun, Qian-Cheng,Zhang, Guo-Dong,&He, Yu-Ming.(2020).A Modified Model for Predicting the Strength of Drying-Wetting Cycled Sandstone Based on the P-Wave Velocity.SUSTAINABILITY,12(14),17.
MLA	Xu, Zhi-Hua,et al."A Modified Model for Predicting the Strength of Drying-Wetting Cycled Sandstone Based on the P-Wave Velocity".SUSTAINABILITY 12.14(2020):17.