摘要
悬挂式止水帷幕在基坑工程中得到了广泛应用。采用地下水渗流软件GMS对室内地下水渗流模型试验进行数值模拟,数值模拟结果与试验结果相互对比,进而验证地下水数值模拟软件的可靠性。在确定软件准确性的基础上,进一步研究在相同悬挂式止水帷幕插入深度下,不同形状基坑中地下水渗流变化规律,为实际工程降水设计提供参考依据。结果表明:数值模拟的计算结果与实际监测到的坑外涌水量以及坑外水位变化较为吻合;不同形状的基坑,帷幕插入深度的增加对坑外水位影响并不明显,但在相同的帷幕插入深度下,不同形状的基坑的涌水量差异较为明显,具体表现为正方形基坑涌水量最大,矩形基坑次之,圆形基坑的涌水量最小。
The suspended water curtain is widely used in foundation pit engineering.GMS is used to simulate the indoor groundwater seepage model test.The numerical simulation results are compared with the test results to verify the reliability of groundwater numerical simulation software.Then on the basis of determining the accuracy of the software,the change rule of groundwater seepage in different shapes of foundation pit under the same insertion depth of suspended water stop curtain are further studied,providing reference for the actual engineering dewatering design.The results show that the numerical simulation is consistent with the actual monitoring of the water inflow outside the pit and the water level change outside the pit;for the foundation pit with different shapes,the increase of the curtain insertion depth has no obvious effect on the water level outside the pit,but under the same curtain insertion depth,the water inflow of the foundation pit with different shapes is quite different,specifically,the water inflow of the square foundation pit is the largest,the rectangle foundation pit is the second,and the water inflow of circular foundation pit is the least.
作者
张钦喜
魏锰
王成名
Zhang Qinxi;Wei Meng;Wang Chengming(College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China)
出处
《岩土工程技术》
2021年第3期146-150,156,共6页
Geotechnical Engineering Technique
基金
北京市自然科学基金重点项目(8171001)。
关键词
悬挂式止水帷幕
数值模拟
涌水量
水位降深
suspended water curtain
numerical simulation
water inflow
water level drawdown
