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RELATED ARTICLES一,巖石變角/圓角剪切夾具基本原理
參照標準TB10115-2014鐵路工程巖(yan)石試(shi)(shi)(shi)驗規程巖(yan)石的(de)剪(jian)(jian)(jian)(jian)切(qie)強度是巖(yan)石抵抗剪(jian)(jian)(jian)(jian)應(ying)力(li)(li)破壞的(de)能力(li)(li),目前室(shi)內測定巖(yan)石剪(jian)(jian)(jian)(jian)切(qie)強度的(de)試(shi)(shi)(shi)驗方法(fa)(fa)很多,如單面和雙面剪(jian)(jian)(jian)(jian)切(qie)等(deng)直接剪(jian)(jian)(jian)(jian)切(qie)試(shi)(shi)(shi)驗和變(bian)角(jiao)板(ban)法(fa)(fa),沖孔(kong)試(shi)(shi)(shi)驗以及三軸(zhou)試(shi)(shi)(shi)驗等(deng)。變(bian)角(jiao)板(ban)法(fa)(fa)是利用(yong)壓(ya)力(li)(li)機施(shi)加垂直荷載,通過一(yi)套特制的(de)夾(jia)具使試(shi)(shi)(shi)件(jian)(jian)沿某一(yi)剪(jian)(jian)(jian)(jian)切(qie)面產生剪(jian)(jian)(jian)(jian)切(qie)破壞,然后通過靜力(li)(li)平衡條(tiao)件(jian)(jian)解析剪(jian)(jian)(jian)(jian)切(qie)面上的(de)法(fa)(fa)向壓(ya)應(ying)力(li)(li)和剪(jian)(jian)(jian)(jian)應(ying)力(li)(li),從(cong)而繪制法(fa)(fa)向壓(ya)應(ying)力(li)(li)(σ)與剪(jian)(jian)(jian)(jian)應(ying)力(li)(li)(τ)之關(guan)系(xi)曲線,求得巖(yan)石的(de)內聚(ju)力(li)(li)(c)和內摩擦角(jiao)(φ)。
二,巖石變角/圓角剪切夾具設備技術參數;
1,制樣設備:鉆石機,切石機,磨石機;
2,壓力機:技術要求同試驗五;
3,變角板剪切夾具一套,要求在45°-70°范圍內有4-5個角度可供調整
4,卡(ka)尺精(jing)度(du)為0.002cm。
參(can)照標準TB10115-2014鐵路工程巖(yan)(yan)石試(shi)(shi)(shi)驗(yan)(yan)規程巖(yan)(yan)石的(de)剪切強(qiang)度是(shi)巖(yan)(yan)石抵抗剪應力(li)(li)破壞的(de)能力(li)(li),目前室內測定巖(yan)(yan)石剪切強(qiang)度的(de)試(shi)(shi)(shi)驗(yan)(yan)方法(fa)很(hen)多,如單面和雙面剪切等直接剪切試(shi)(shi)(shi)驗(yan)(yan)和變角(jiao)板(ban)法(fa),沖孔試(shi)(shi)(shi)驗(yan)(yan)以(yi)及三軸試(shi)(shi)(shi)驗(yan)(yan)等。變角(jiao)板(ban)法(fa)是(shi)利用壓(ya)力(li)(li)機施加垂(chui)直荷載(zai),通(tong)過一(yi)套特制的(de)夾(jia)具使試(shi)(shi)(shi)件沿(yan)某一(yi)剪切面產生剪切破壞,然(ran)后通(tong)過靜力(li)(li)平衡條件解析剪切面上的(de)法(fa)向(xiang)壓(ya)應力(li)(li)和剪應力(li)(li),從而(er)繪制法(fa)向(xiang)壓(ya)應力(li)(li)