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盾构近距离掘进对桥梁桩基的影响分析 被引量:20

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摘要 以深圳地铁白石洲—科技园区间盾构隧道近距离穿越沙河立交桥桩基础为研究对象,采用三维非线性有限元,对盾构掘进施工所引起的桥台桩基础的应力和变形进行了模拟计算。研究结果表明:盾构掘进过程中将会引起临近桩基发生平行盾构轴线和垂直盾构轴线方向的挠曲变形,从而导致桩基内部产生显著的附加轴力和弯矩;桩基础的应力和变形都随着盾构的推进而不断变化,在盾构尾部通过桩基平面时达到最大值。同时提出了盾构近距离掘进过程中的施工注意事项和对桩周土的加固措施。
出处 《铁道建筑》 北大核心 2007年第8期37-40,共4页 Railway Engineering
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