中国港湾建设

深基坑开挖的理论计算与工程监测结果分析

作者：靳雪梅李锁柱

关键词：深基坑地下连续墙有限元法

分类号：TU753

出版年,卷(期):页码：2010,34(2):8-11

摘要：

大量的基坑工程实践表明,深基坑工程仅仅依靠理论分析和经验估计难以完成经济可靠的基坑支护设计和施工。文中以天津港南疆港区神华煤炭码头建设工程两座廊道的地下连续墙工程为案例,对地下连续墙的墙体位移、支撑轴力等方面进行工程监测,并利用二维有限元程序对其进行了理论计算分析,藉以探讨有限元计算结果与工程监测之间的差距。通过有限元计算值与实测数据对比发现,墙体最大水平位移的计算值较实测数据稍偏大,墙体最大竖向位移和支撑轴力的计算值与实测数据有一定差距。结果表明,有限元方法可以分析墙体最大水平位移,而最大竖向位移和支撑轴力的分析方法值得进一步探讨。

The large number of foundation engineering practice shows that the theory of deep foundation engineering and technology is not mature,based only on theoretical analysis and experience difficulties in completing the economic and reliable estimate of the foundation pit design and construction,this article is based on Tianjin Port Nanjiang Port Shenhua Coal Terminal 2 corridor construction of Continuous Diaphragm wall works for the case in the Continuous Diaphragm Wall of the excavation case,axial force and other aspects of support to carry out the works to monitor,by using two-dimensional finite element program PLAXIS analysis,and Comparison of monitoring data to examine the finite element method results and the gap between project monitoring.,to examine the gap between the finite element calculation results and engineering monitoring. The finite element calculated values compared with the measured data found that the maximum horizontal displacement of the wall compared with the measured data the calculated values large ,vertical displacement of the wall and support the largest axial force calculated and measured data have some gaps. The results show that the finite element method can analyze the maximum horizontal displacement of the wall,while the maximum vertical displacement and axial force method of analysis support is worth further exploration.

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参考文献：

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