扬中地区基坑降水方案的室内试验研究

Indoor Test Study on Dewatering Scheme of Foundation Pit in Yangzhong Area

为提高降水管井的降水效率,本文通过室内降水试验,选用不同过滤段长度与滤料粒径来研究其对抽水效率的影响。研究表明,过滤段长度的变化对抽水效率的影响并不明显,但是粒径的大小对其抽水效率影响规律较明显,其结果显示滤料粒径越大,降水效果反而越差,相对滤料粒径小者,降水效果更好。故根据本次研究结果,建议扬中地区管井施工时,尽可能选取小粒径滤料以提高管井抽水效率。

In order to improve the precipitation efficiency of dewatering pipe wells, through indoor dewatering experiments, the influence of different length of filter section and particle size of filter material on the pumping efficiency is studied in this paper. The results show that the influence of the length of filter section on pumping efficiency is not obvious, but the influence of particle size on pumping efficiency is obvious. The results show that the larger the particle size of filter material, the worse the precipitation effect, and the better the precipitation effect is compared with the smaller the particle size of filter material. Therefore, according to the results of this study, it is suggested that small size filter material should be selected as far as possible to improve the pumping efficiency of pipe wells in Yangzhong area.