【摘要】：利用分離式Hopkinson壓桿試驗(yàn)裝置,進(jìn)行了凍結(jié)黏土在單軸與主動(dòng)圍壓兩種狀態(tài)下的動(dòng)態(tài)沖擊壓縮試驗(yàn),對比分析了單軸與主動(dòng)圍壓狀態(tài)下凍結(jié)黏土的動(dòng)態(tài)應(yīng)力-應(yīng)變曲線、動(dòng)態(tài)抗壓強(qiáng)度和破壞模式。研究結(jié)果表明:單軸狀態(tài)下,溫度為-15℃時(shí),動(dòng)態(tài)應(yīng)力-應(yīng)變曲線可分為彈性階段、塑性階段和破壞階段;主動(dòng)圍壓狀態(tài)下,-5℃和-15℃的動(dòng)態(tài)應(yīng)力-應(yīng)變曲線可分為彈性階段、塑性階段和破壞階段。在相同應(yīng)變率和凍結(jié)溫度的條件下,主動(dòng)圍壓狀態(tài)下凍結(jié)黏土的動(dòng)態(tài)抗壓強(qiáng)度均高于無圍壓狀態(tài),動(dòng)態(tài)抗壓強(qiáng)度隨著主動(dòng)圍壓的增加而增大;當(dāng)凍結(jié)溫度和圍壓相同的條件下,動(dòng)態(tài)抗壓強(qiáng)度隨應(yīng)變率的提高而增大;單軸狀態(tài)下,溫度為-5℃時(shí),凍結(jié)黏土呈塑性破壞,溫度為-15℃時(shí),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