更新時間:2019-11-11
變角板(ban)(ban)剪切(qie)試(shi)(shi)(shi)驗(yan)(yan)夾(jia)具參(can)照標準(zhun)鐵路工程(cheng)(cheng)巖(yan)(yan)石(shi)變角板(ban)(ban)剪切(qie)試(shi)(shi)(shi)驗(yan)(yan)夾(jia)具鐵路工程(cheng)(cheng)巖(yan)(yan)石(shi)試(shi)(shi)(shi)驗(yan)(yan)規(gui)程(cheng)(cheng)巖(yan)(yan)驗(yan)(yan)規(gui)程(cheng)(cheng)巖(yan)(yan)石(shi)的(de)剪切(qie)強度是巖(yan)(yan)石(shi)抵抗剪應力(li)破壞的(de)能力(li),目前室(shi)內測(ce)定巖(yan)(yan)石(shi)剪切(qie)強度的(de)試(shi)(shi)(shi)驗(yan)(yan)方(fang)法很多,如單面和(he)(he)雙(shuang)面剪切(qie)等(deng)直接剪切(qie)試(shi)(shi)(shi)驗(yan)(yan)和(he)(he)變角板(ban)(ban)法,沖(chong)孔試(shi)(shi)(shi)驗(yan)(yan)以及三軸試(shi)(shi)(shi)驗(yan)(yan)等(deng)
一巖石變角板剪切試驗夾具,基本(ben)原理(li)
參照(zhao)標準TB10115-2014鐵路工(gong)程(cheng)巖(yan)(yan)(yan)石試驗規程(cheng)巖(yan)(yan)(yan)石的(de)剪切強度(du)是巖(yan)(yan)(yan)石抵抗剪應力破(po)壞的(de)能力,目前室(shi)內測定(ding)巖石剪切強度的試(shi)驗方法(fa)很多,如單面(mian)和雙面(mian)剪(jian)切(qie)等直接剪(jian)切(qie)試驗和變角板法,沖孔(kong)試驗以及三(san)軸試驗等(deng)。
變角(jiao)板法是利用壓力機施加垂直荷載,通過一套(tao)特制的夾具使試件沿(yan)某(mou)一剪切面產(chan)生剪切破壞(huai),然后通過(guo)靜力(li)平衡條件(jian)解析剪(jian)切(qie)面上(shang)的法向壓應力(li)和剪(jian)應力(li),從而繪制(zhi)法向壓應力(li)(σ)與(yu)剪應力(li)(τ)之關系曲線,求得(de)巖石的內聚(ju)力(li)(c)和內摩擦角(jiao)(φ)。
二,巖石變角板剪切試驗夾具設備技術參數;
1,制樣設(she)備(bei):鉆石機(ji),切石機,磨(mo)石(shi)機;
2,壓力機:技術要求同試驗五(wu);
3,一(yi)套,要(yao)求在45°-70°范圍內有4-5個角度可供(gong)調整
4,卡尺(chi)精度為0.002cm。
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