SEEP/W在深基坑降水效果對比分析中的應用
  • 作者: 加青雙,宋飛
論文摘要

 

SEEP/W在深基坑降水效果對比分析中的應用 

加青雙1,宋飛2

1. 中鐵六局集團廣州工程有限公司,廣東 廣州 514000; 2. 西南交通大學土木工程學院,四川 成都 610031

[摘要]以佛山地鐵3號線高村站地鐵深基坑為工程背景, 借助有限元軟件SEEP/W,對比分析真空管井降水與普通管井降水效果。主要分析土體滲透系數在0.04,0.4,0.04m/d時,設置止水帷幕深度為0,32,43m時各種工況在進行真空管井降水和普通管井降水的30d降水穩定深度、降水最大流量及達到穩定水流量所需時間,可以得到結論,即應用GeostudioSEEP/W模塊進行計算對比基坑降水效果可行;滲透系數越大,止水帷幕的深度越深,兩種降水方式均表現為效果越好,且真空管井降水施工完成后出現負壓區的范圍更大,其降水效果更好。

[關鍵詞]地鐵;深基坑;降水效果;數值模擬;施工技術

[中圖分類號]TU753;U231.3        [文獻標識碼]A        [文章編號]2097-0897(2021)23-0121-05

Application of SEEP/W in Comparative Analysis of Dewatering Effect of Deep Foundation Excavation 

JIA Qingshuang1, SONG Fei2

(1.Guangzhou Engineering Co., Ltd. of China Railway Sixth Group Co., Ltd., Guangzhou,Guangdong 514000, China; 2.School of Civil Engineering, Southwest Jiaotong University, Chengdu,Sichuan 610031, China)

Abstract: Based on the deep foundation excavation of Gaocun Station of Foshan Subway line 3, with the help of finite element software SEEP/W, the effect of vacuum tube well dewatering and ordinary tube well dewatering was compared and analyzed. The main analysis is that the soil permeability coefficient is 0.04m/d, 0.4m/d, 0.04m/d, and the water-stop curtain depth is 0, 32m, 43m, various working conditions are used for vacuum tube well dewatering and ordinary tube well dewatering for 30 days of precipitation stable depth, the maximum precipitation flow and the time required to reach a stable water flow can be concluded that it is feasible to use  SEEP/W module in Geostudio to calculate and compare the precipitation effect of foundation excavation; the greater the permeability coefficient, the deeper the depth of the water-stop curtain. Both of the two precipitation methods show better results, and the negative pressure area will be larger after the vacuum tube well dewatering construction is completed, and the precipitation effect will be better.

Keywords: subways;deep foundation excavation;dewatering effect;simulation;construction

[作者簡介]加青雙,總工程師,高級工程師,Email5805706@qq.com

 

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