基坑工程疏干降水效果分析与评判方法

An Analysis and Evaluation Method on Dewatering Effectiveness in Excavation Engineering

本文简述了基坑工程疏干降水的基本作用,讨论了目前工程界关于基坑工程疏干降水的模糊认识或误解,对"基坑工程疏干降水"作了准确的定义。阐述了松散地层中基坑工程疏干降水效果的常用检验方法及其不足之处,提出了关于基坑工程疏干降水效果的评判标准。给出了关于基坑内被开挖土体的疏干度及含水量有效降幅的计算方法,建议了一种关于基坑疏干降水效果的分析与评判方法。工程算例表明,本文论述的基坑疏干降水效果分析方法简明实用,评判标准切合实际,便于推广应用。

The fundamental roles of dewatering in excavation engineering were briefly stated,and the blurred cognition or misunderstanding of the dewatering in present engineering circles was discussed,and an appropriate definition of dewatering in excavation engineering was given.The common examination and test methods and their drawbacks were described of dewatering effectiveness in excavation engineering in loose sediments,and an evaluation standard of dewatering effectiveness was proposed.And the calculation method of drainage degree and effective decrease of water content of the excavated soils,and the one of analysis and evaluation on dewatering effectiveness,were provided.The results of two demonstration cases show that,the discussed analysis methods and evaluation standard of dewatering effectiveness are concise and practical,which are convenient to be popularized and applied.