软土盾构隧道结构理论与模型试验研究
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摘要
本文通过上海典型地质条件下的盾构隧道结构的相似模型试验量测的模型结构纵向位移分布和纵向的地基土反力(土压力)的分布与结构原型相应理论结果的对比分析,表明尽管理论值比试验值大,但两者的规律相同,通过适当调整局部均布荷载作用下弹性地基梁解析解完全可以满足纵向设计需要,为局部均布荷载作用下软土盾构隧道结构在设计阶段就考虑避免和减小地铁隧道结构运营阶段出现纵缝过量变形所致的渗水、漏水、纵向开裂等既增加运营维护费用又影响地铁安全的问题奠定了基础。
The analytic solutions of the displacement, internal forces of shield tunnel and ground reaction of the shield tunnel constructed in soft soil under the same locally uniformly distributed loud under which the simultaneous structure model test Was conducted was compared with the datum of the longitudinal simultaneous model test of 50 rings of the shield tunnel with nonstaggering installation pattern, especially the displacements and ground reactions. The results show that the values of calculation and results of the model test are different, but they are very similar. So the method of analyzing shield tunnel can be used to design the shield tunnel in longitude under any locally even load, and is one way to conquer such problems as the failure of tunnel structure and waterproofing of joints, which iscaused by the longitudinal deformation of shield tunnel.
The analytic solutions of the displacement, internal forces of shield tunnel and ground reaction of the shield tunnel constructed in soft soil under the same locally uniformly distributed loud under which the simultaneous structure model test Was conducted was compared with the datum of the longitudinal simultaneous model test of 50 rings of the shield tunnel with nonstaggering installation pattern, especially the displacements and ground reactions. The results show that the values of calculation and results of the model test are different, but they are very similar. So the method of analyzing shield tunnel can be used to design the shield tunnel in longitude under any locally even load, and is one way to conquer such problems as the failure of tunnel structure and waterproofing of joints, which iscaused by the longitudinal deformation of shield tunnel.
引文
[1]黄宏伟，臧小龙．盾构隧道纵向变形性态研究分析[J]．地下空间，2002，22(3)：244～251
[2]余占奎，黄宏伟，徐凌，李文婷．软土盾构隧道纵向设计综述[J]．地下空间与工程学报，2005，1(2)：315～318
[3]志波由纪夫，川岛一彦，大日方尚己，加纳尚史．耐震解析长手方向覆工刚性评价法[C]．土木学会论文集，1988年10月，pp．319～327
[4]志波由纪夫，川岛一彦，大日方尚己，加纳尚史．応答变位法地震时断面力算定法[C]．土木学会论文集，1989年4月，pp．385～394
[5]田敬学，张庆架．盾构法隧道的纵向刚度计算方法[J]．中国市政工程，2001(3)：35～37
[6] Chert Bao, Wen Zhuyin. Elasto-plastic analysis for the effect of longitudinal uneven settlement[C].Proceedings of the ITA World Tunnelling Cogrtress 2003, A. A. Balkema, 2003
[7]廖晓明．圆形隧道纵向剪切传递效应研究[D]．上海：同济大学地下建筑与工程系，2002
[8]臧小龙．软土盾构隧道纵向结构变形研究[D]．上海：同济大学地下建筑与工程系，2003
[9]#12
[10]徐凌．软土盾构隧道纵向沉降研究[D]．上海：同济大学地下建筑与工程系，2005
[11]余占奎等．局部均布荷载作用下软土盾构隧道的结构分析[J]．特种结构，2006年第4期(待发表)
[2]余占奎，黄宏伟，徐凌，李文婷．软土盾构隧道纵向设计综述[J]．地下空间与工程学报，2005，1(2)：315～318
[3]志波由纪夫，川岛一彦，大日方尚己，加纳尚史．耐震解析长手方向覆工刚性评价法[C]．土木学会论文集，1988年10月，pp．319～327
[4]志波由纪夫，川岛一彦，大日方尚己，加纳尚史．応答变位法地震时断面力算定法[C]．土木学会论文集，1989年4月，pp．385～394
[5]田敬学，张庆架．盾构法隧道的纵向刚度计算方法[J]．中国市政工程，2001(3)：35～37
[6] Chert Bao, Wen Zhuyin. Elasto-plastic analysis for the effect of longitudinal uneven settlement[C].Proceedings of the ITA World Tunnelling Cogrtress 2003, A. A. Balkema, 2003
[7]廖晓明．圆形隧道纵向剪切传递效应研究[D]．上海：同济大学地下建筑与工程系，2002
[8]臧小龙．软土盾构隧道纵向结构变形研究[D]．上海：同济大学地下建筑与工程系，2003
[9]#12
[10]徐凌．软土盾构隧道纵向沉降研究[D]．上海：同济大学地下建筑与工程系，2005
[11]余占奎等．局部均布荷载作用下软土盾构隧道的结构分析[J]．特种结构，2006年第4期(待发表)
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