建筑工程设计、施工与研究 |
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土压力作用下邻近基坑地表沉降计算分析 |
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CALCULATION AND ANALYSIS ON GROUND SETTLEMENT BETWEEN ADJACENT FOUNDATION PITS UNDER SOIL PRESSURE |
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摘要 相邻基坑间的土条地面沉降量与土体性质、围护结构、基坑深度、地面荷载等有关,其中因土压力引起的围护结构变形影响最大,且规范中尚未有现成的计算公式,通过采用叠加的方法计算土压力,计算围护结构变形,再根据围护结构变形的体积等于地表沉陷的体积计算地表沉降,并与现场监测对比分析,发现二者吻合较好,说明该计算方法有较好的适用性。 |
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关键词: 基坑
土压力
地表沉降
摩阻力
围护结构
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Abstract:
Settlement of soil strip between adjacent foundation pits is related to soil nature, enclosure structure, depth of foundation pit and ground load, among which enclosure structure deformation caused by soil pressure is the biggest reason and standard calculation formula is not available in current specifications. Ground settlement could be calculated in terms of the volume of ground settlement which is equal to the deformation of enclosure structure. Overall soil pressure could be calculated and then the deformation of enclosure structure could be calculated. The ground settlement obtained is compared with field monitoring data to find that they are approximately equal to each other. The analysis result shows that the calculation method has relatively good applicability.
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Key words: foundation pit soil pressure ground settlement frictional resistance enclosure structure |
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