【摘要】：利用分離式Hopkinson壓桿試驗裝置,進行了凍結(jié)黏土在單軸與主動圍壓兩種狀態(tài)下的動態(tài)沖擊壓縮試驗,對比分析了單軸與主動圍壓狀態(tài)下凍結(jié)黏土的動態(tài)應力-應變曲線、動態(tài)抗壓強度和破壞模式。研究結(jié)果表明:單軸狀態(tài)下,溫度為-15℃時,動態(tài)應力-應變曲線可分為彈性階段、塑性階段和破壞階段;主動圍壓狀態(tài)下,-5℃和-15℃的動態(tài)應力-應變曲線可分為彈性階段、塑性階段和破壞階段。在相同應變率和凍結(jié)溫度的條件下,主動圍壓狀態(tài)下凍結(jié)黏土的動態(tài)抗壓強度均高于無圍壓狀態(tài),動態(tài)抗壓強度隨著主動圍壓的增加而增大;當凍結(jié)溫度和圍壓相同的條件下,動態(tài)抗壓強度隨應變率的提高而增大;單軸狀態(tài)下,溫度為-5℃時,凍結(jié)黏土呈塑性破壞,溫度為-15℃時,凍結(jié)黏土呈脆性破壞。
[Abstract]:The dynamic shock compression tests of frozen clay under uniaxial and active confining pressures were carried out by using a separate Hopkinson compression bar test device. The dynamic stress-strain curves of frozen clay under uniaxial and active confining pressures were compared and analyzed. Dynamic compressive strength and failure mode. The results show that the dynamic stress-strain curve can be divided into elastic stage, plastic stage and failure stage under uniaxial state and temperature of -15 鈩，

本文編號：2305502