本文選題：地裂縫 + 高速鐵路　； 參考：《鐵道建筑》2014年06期

【摘要】：在實(shí)驗(yàn)室內(nèi),采用幾何比尺1∶20的物理模型試驗(yàn)?zāi)M分析高速鐵路橋梁45°穿越地裂縫帶時(shí),地裂縫不同活動(dòng)量對(duì)橋墩樁端應(yīng)力、橋上軌道變形、穩(wěn)定性等的影響。研究結(jié)果表明:隨地裂縫上盤沉降量的增加,樁端壓力主要表現(xiàn)為上盤減小,下盤靠近地裂縫處樁端壓力明顯增大;當(dāng)?shù)亓芽p垂直位錯(cuò)量達(dá)到2 cm時(shí)地表出現(xiàn)開裂;當(dāng)?shù)亓芽p垂直位錯(cuò)量達(dá)到3 cm時(shí)軌道道床板靠近地裂縫處開始出現(xiàn)裂縫;當(dāng)沉降量達(dá)到4 cm時(shí)地裂縫貫穿道床板;地裂縫活動(dòng)對(duì)跨過地裂縫的箱梁、道床板和軌道影響較大,而對(duì)未跨過的影響不大。本文研究結(jié)果可為高速鐵路工程中地裂縫災(zāi)害的防治和預(yù)警提供參考。
[Abstract]:In the laboratory, the physical model test of 1:20 geometric scale is used to simulate and analyze the effects of different activities of ground fissures on pile end stress, deformation and stability of bridge piers when high-speed railway bridge crosses the ground fissure at 45 擄. The results show that with the increase of settlement, the pile end pressure decreases, the pile end pressure increases obviously near the ground fissure, and the surface cracks occur when the vertical dislocations of the local cracks reach 2 cm. When the vertical dislocations of local cracks reach 3 cm, cracks begin to appear on the track bed near the ground fissures, and when the settlement reaches 4 cm, the ground fissures run through the bed, and the ground fissures have a great influence on the box girders crossing the ground cracks, the track bed and the track. But it has little effect on the uncrossed. The results of this paper can provide a reference for the prevention and early warning of ground fissures in high speed railway engineering.
【作者單位】： 大西鐵路客運(yùn)專線有限責(zé)任公司;鐵道第三勘察設(shè)計(jì)院集團(tuán)有限公司;長安大學(xué);
【分類號(hào)】：U445.7

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本文編號(hào)：2073228