本文選題：針刺GCL + 破壞機理　； 參考：《巖土工程學(xué)報》2017年08期

【摘要】：土工膨潤土防水毯(GCL)的內(nèi)部剪切強度是影響復(fù)合防滲襯里邊坡穩(wěn)定性的關(guān)鍵因素,加筋纖維的存在使針刺GCL的內(nèi)部剪切強度明顯高于非加筋GCL。含水化GCL的復(fù)合防滲襯里結(jié)構(gòu)剪切試驗會發(fā)生應(yīng)力小峰值現(xiàn)象,但大都被研究人員忽視;加筋纖維對GCL峰值剪切強度的貢獻(xiàn)處于定性階段。通過開展GCL內(nèi)夾鈉基膨潤土的飽和剪切試驗和理論分析,證實應(yīng)力小峰值現(xiàn)象為水化針刺GCL應(yīng)力位移曲線的固有特征,并且小峰值應(yīng)力代表了GCL內(nèi)夾膨潤土的抗剪強度貢獻(xiàn)。以應(yīng)力位移曲線上的應(yīng)力小峰值現(xiàn)象為基礎(chǔ),將加筋纖維對GCL峰值剪切強度的貢獻(xiàn)定量化,結(jié)合破壞機理分析了針刺GCL內(nèi)部剪切破壞和應(yīng)力位移發(fā)展過程�？紤]針刺GCL剪切強度各部分貢獻(xiàn),提出了一種能反映針刺GCL破壞機理的峰值強度準(zhǔn)則。
[Abstract]:The internal shear strength of geobentonite waterproof blanket is the key factor to influence the stability of composite impervious lining slope, and the internal shear strength of needled GCL is obviously higher than that of non-reinforced GCLs due to the existence of reinforced fiber. The shear test of hydrated GCL composite impervious lining structure will produce the phenomenon of small peak stress, but most of them are ignored by the researchers, and the contribution of reinforced fiber to the peak shear strength of GCL is in the qualitative stage. Through the saturated shear test and theoretical analysis of sodium bentonite in GCL, it is proved that the phenomenon of small peak stress is the inherent characteristic of GCL stress-displacement curve of hydration acupuncture, and the small peak stress represents the contribution of shear strength of GCL intercalated bentonite. Based on the phenomenon of small peak stress on the stress-displacement curve, the contribution of reinforced fibers to the peak shear strength of GCL is quantified, and the internal shear failure and stress displacement development process of needling GCL are analyzed in combination with the failure mechanism. Considering the contribution of various parts of the GCL shear strength, a peak strength criterion is proposed, which can reflect the failure mechanism of Acupuncture GCL.
【作者單位】： 南昌大學(xué)建筑工程學(xué)院;巖土力學(xué)與堤壩工程教育部重點實驗室(河海大學(xué));密歇根州環(huán)境保護(hù)廳;
【基金】：國家自然科學(xué)基金重點項目(41530637) 江西省青年科學(xué)基金項目(20161BAB216115) 巖土力學(xué)與堤壩工程教育部重點實驗室開放基金項目(GH201404)
【分類號】：TU531.7

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