地下室泄水减压抗浮技术的探讨与应用

Discussion and application of the water-discharging pressure relief technology in the anti-floating design of basement

主要探讨了泄水减压法在地下室抗浮设计中的原理,研究了泄水减压技术在实际工程中的适用范围和主要特点。通过采用FLAC3D软件对五角西岸住宅项目的地下室进行抗浮分析,揭示了地下室侧面泄水孔间距大小对泄水减压效果的影响规律。通过模拟分析,探讨了地下室表层回填土夯实程度对泄水减压效果的影响。结果表明,表层回填土夯实与否是地下室抗浮安全的关键因素。最后,针对地下室侧面泄水孔布置情况开展多参数、多工况抗浮设计计算,提出了泄水孔的合理间距范围及有关地下室设计施工的建议。

The principle of water-discharging pressure relief method application in the anti-floating design of basement was mainly discussed. The application scope and main characteristics of the water-discharging pressure relief technology in practical engineering were studied. Through applying FLAC3 D software in anti-floating analysis of the basement for Wujiaoxi＇an Residential project,it reveals that the influencing laws of the spacing of drainage holes in basement on water-discharging pressure relief effect. The influence of compaction degree of surface backfill soil for basement on water-discharging pressure relief effect was discussed through simulation analysis. Results show that the compaction degree of surface backfill soil for basement is an critical factor for anti-floating design of the basement. Finally,anti-floating design calculations with multiple parameters and multiple working conditions were carried out for the arrangement of the drain holes at basement sides,and the optimal spacing between drainage holes was suggested along with advices on the design and construction of basement.