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天津于家堡基坑工程群开挖体量巨大,且面临着多个距离较近的相邻基坑开挖的相互影响问题,采用三维数值模型对基坑工程群的开挖进行模拟,计算结果表明基坑群开挖造成距离较近的基坑之间的坑外地面沉降叠加,并影响支撑轴力的分布。结合计算结果,提出合理的基坑开挖顺序、设计加强建议以及施工控制措施。
The excavation volume of the Yujiapu foundation pit project group in Tianjin is huge and it is confronted with the interaction of several adjacent excavations at a relatively close distance. The three-dimensional numerical model is used to simulate the excavation of the foundation pit engineering group, and the calculation The results show that the excavation of the foundation pit results in the superposition of the settlement of the ground outside the pit between the adjacent excavations and affects the distribution of the supporting axial forces. Combined with the calculation results, a reasonable order of excavation sequence, design suggestions and construction control measures are put forward.