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CENTRIFUGAL MODEL TESTS ON MECHANICAL PROPERTY OF CELLULAR DIAPHRAGM WALL
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摘要: 运用离心试验来模拟格型地下连续墙在砂土及黏土中的受力性状。在试验中,主要对墙体变形、墙体应力、土压力进行研究。结果表明:土质对于格型地下连续墙的受力变形性状影响很大,在黏土中试验的土压力、墙体弯矩、墙体变形都大于在砂土中的试验结果;由于有隔墙的存在,格型地下连续墙的整体位移模式类似于重力坝式的整体前倾;无论在黏土还是砂土中,在格型地下连续墙相同位置的内侧土压力基本都比外侧土压力大,前墙弯矩都较后墙要大,证实了前墙在实际工程设计中比后墙厚具有合理性;改变土体(由砂土改为饱和黏土)使得前、后墙的最大弯矩增加了近3倍。Abstract: The centrifugal model tests were used to study mechanical property of cellular diaphragm wall in the clay and in the sand.The strains of the walls,the displacements of the walls and soil pressures were measured in the model tests.The results showed that soil pressure,bending moment and displacement of walls in the sand were greater than in the clay.The displacement model of cellular diaphragm wall was overall forward.The soil pressure in the inner was larger than the outer in the same section.It was reasonable to make front wall thicker than back wall due to the greater bending moment of front wall.Compared with in the sand,the maximum moment for front and back wall increased nearly three times in the clay.
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Key words:
- cellular diaphragm wall /
- centrifugal model test /
- soil pressure /
- bending moment /
- displacement
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