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江岸水泵房的施工在电厂建筑中是一项比较复杂的工作,特别是正确处理地表水及地下水的问题至为重要。北京热电厂的江岸水泵房的工程根据木板桩、钢板桩、沉井及多层井点法等降低地下水位的施工方案,做了多次技术经济比较,最后才选用两层井点方案,因为它是最符合当前多快好省方针的措施。由于我们还缺乏经验,及当地地质条件特殊,虽按两层井点施工,但实际运行时是单层井点。现将井点法降低地下水的设计和施工经验介绍于下,以供参考。一、水文地质条件根据地质钻探资料,水泵房地区的土壤自上而下大约可分为四层:自然地面深达5.6米以内,主要为砂质粘土及砂质(土户)坶,有砂类土壤的夹层;在7米以
The construction of the river bank pump house is a relatively complicated task in the construction of the power plant, especially the issue of correct treatment of surface water and groundwater. The construction of the river bank pump house of the Beijing Thermal Power Plant was based on the construction plan for reducing the groundwater level, such as wood piles, steel sheet piles, caisson and multi-layer wells, and a number of technical and economic comparisons were made. Finally, the two-tier well program was selected because it It is the measure that best meets the current provincial policy. Due to our lack of experience and the special geological conditions in the area, the construction of two-tier wells is actually a single-tiered well. Now we will introduce the design and construction experience of lowering groundwater wells for reference. I. Hydrogeological conditions According to the geological drilling data, the soil in the pump house area can be roughly divided into four layers from the top to the bottom: the natural surface is less than 5.6 meters deep, mainly sandy clay and sandy (Teihu), with sand. Interlayer of soil; at 7 meters