【摘要】：針對(duì)采空塌陷對(duì)輸氣管道的潛在威脅,采用管道-土壤相互作用(PSI)單元,結(jié)合三向土彈簧非線性模型,建立采空塌陷區(qū)埋地輸氣管道的有限元計(jì)算模型,分析了不同管徑、壁厚和內(nèi)壓影響下管道的變形和受力規(guī)律,并確定最大變形和最大受力的位置。結(jié)果表明:適當(dāng)增加壁厚和減少內(nèi)壓能有效提高管道的安全性;最大Von-Mises應(yīng)力和最大豎向應(yīng)變位置均在內(nèi)邊緣塌陷區(qū)且靠近中間塌陷區(qū);最大軸向應(yīng)力和最大軸向應(yīng)變位置均位于中間塌陷區(qū)兩側(cè)。所得結(jié)果對(duì)埋地輸氣管道穿越采空區(qū)的安全防護(hù)具有一定參考價(jià)值。
[Abstract]:In view of the potential threat of mining collapse to gas transmission pipeline, the finite element calculation model of buried gas pipeline in cave-in area is established by using pipe-soil interaction (PSI) element and the nonlinear model of three-way soil spring, and different pipe diameters are analyzed. Under the influence of wall thickness and internal pressure, the deformation and force law of pipeline are determined, and the position of maximum deformation and maximum force is determined. The results show that the safety of the pipeline can be improved by increasing the wall thickness and reducing the internal pressure, the maximum Von-Mises stress and the maximum vertical strain are located in the inner edge collapse area and are close to the intermediate collapse area. The maximum axial stress and maximum axial strain are located on both sides of the intermediate collapse area. The results are valuable for safety protection of buried gas pipeline through goaf.
【作者單位】： 西南石油大學(xué)石油與天然氣工程學(xué)院;
【基金】：國(guó)家科技支撐計(jì)劃項(xiàng)目(2011BAK06B01-11) 中國(guó)石油西氣東輸管道公司項(xiàng)目XGSGL01423)
【分類號(hào)】：TE973

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