本文選題：軟黏土 + 海底管道��； 參考：《中國海洋大學(xué)學(xué)報(自然科學(xué)版)》2017年10期

【摘要】：針對軟黏土海床條件,基于被動土壓力理論建立了海底管道側(cè)向失穩(wěn)預(yù)測模型。利用準(zhǔn)靜態(tài)平衡分析,該模型將極限側(cè)向土阻力分解為被動土壓力和滑動土阻力兩個分量。驗(yàn)證分析表明,模型預(yù)測結(jié)果與文獻(xiàn)[3]實(shí)驗(yàn)結(jié)果吻合較好。參量研究發(fā)現(xiàn),在穩(wěn)態(tài)海流作用下,隨著軟黏土不排水抗剪強(qiáng)度增大,維持管道在位穩(wěn)定所需的最小埋深呈冪指數(shù)減小趨勢;同時,極限側(cè)向土阻力中的滑動土阻力分量呈非線性增大,相應(yīng)的被動土壓力分量則逐漸降低。
[Abstract]:Based on the passive earth pressure theory, the lateral instability prediction model of submarine pipeline is established for the soft clay seabed condition. By using quasi-static equilibrium analysis, the ultimate lateral soil resistance is decomposed into two components: passive soil pressure and sliding soil resistance. Verification and analysis show that the model prediction results are in good agreement with the experimental results in literature [3]. It is found that the minimum buried depth required to maintain the in-situ stability of the pipeline decreases exponentially with the increase of the undrained shear strength of the soft clay under the action of steady current, and at the same time, In the ultimate lateral soil resistance, the sliding soil resistance component increases nonlinear, and the corresponding passive soil pressure component decreases gradually.
【作者單位】： 中國科學(xué)院力學(xué)研究所流固耦合系統(tǒng)力學(xué)重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué)工程科學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(11372319;11232012) 中國科學(xué)院戰(zhàn)略性先導(dǎo)科技專項(xiàng)(B類)項(xiàng)目(XDB22030000)資助~~
【分類號】：P756.2
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本文編號：2000894