土工基础

›› 2017, Vol. 31 ›› Issue (5): 549-553.

• 工程实录 • 上一篇    下一篇

真空管井降水技术在深埋弱透水层中的应用研究

苗 旺，邹剑峰，詹志习，张海丰   

  1. （黄河勘测规划设计有限公司,郑州 450003）
  • 收稿日期:2017-01-03 修回日期:2017-01-16 出版日期:2017-10-20 发布日期:2017-10-29
  • 作者简介:苗 旺（1984-），男，硕士，高级工程师，研究方向为基坑降水、水文地质及地下水环境影响评价。

Application of Vacuum Tube Dewatering Technique in Deep Aquitard Layers

MIAO Wang, ZOU Jianfeng, ZHAN Zhixi, ZHANG Haifeng   

  1. (Yellow River Engineering Consulting Co., Ltd., Zhengzhou 450003)
  • Received:2017-01-03 Revised:2017-01-16 Online:2017-10-20 Published:2017-10-29

摘要： 结合南水北调中线一期穿黄工程ⅡB标隧洞降水工程实例，介绍真空管井降水技术在深埋弱透水层中的应用效果。通过理论分析、现场监测、室内试验等手段探讨真空管井的工作原理、适用条件及施工效果，研究隧洞工程中深埋弱透水地层的降水问题。结果表明：真空管井降水技术广泛适用于持水性较强的粉质壤土、粉质粘土、粘土及淤泥质土，能够有效排出土体中的毛细水和重力水，降低土体含水量，加速土体固结，具有降水时间短、效果好、经济效益显著等特点，可在各类隧洞工程中推广应用，为类似地层的降排水设计、施工和研究提供有益的借鉴与参考。

关键词: 真空管井技术, 基坑降水, 深埋弱透水层

Abstract: The application of vacuum tube dewatering technique was used in Contract Package IIB of water tunnel of the YellowRiverCrossing project in MidRoute of SouthtoNorth water transfer project. The principles as well as results of applying this dewatering method in the low permeability aquifer soils are introduced throughout theoretical approach, construction monitoring and laboratory testing results. The mechanism, range of applications and expected results are also evaluated in the paper. The results indicate that the vacuum tube dewatering method can be effectively applied in soils high water retention, such as, silty loam, silty clay, clay and mucky clay. This dewatering method can effectively drain the capillary and gravity water in the soil and accelerate the consolidation process in a relatively shorter time. It is also cost effective.

Key words: Vacuum Tube Well, Deep Excavation Dewatering, Deep Aquitard