浅析田市泵站施工基坑降排水方案确定浅析田市泵站施工基坑降排水方案确定 摘要:田市泵站改造施工场地由于地下水埋藏较浅,高于基坑地面,必须将地下水降至基坑地面下 0.5m 以下,以方便地基处理和基础施工。本文结合场地地质条件和工程实际,参考《建筑基坑支护技术规程》(JGJ120-99)地下水控制章节的相关内容,确定管井降排水方案,该方案实施后达到了预期效果,可供同类工程参考。 关键词:深基坑 降排水 方案确定 Abstract: pumping station construction site transformation field due to groundwater buried depth is more shallow, higher than the surface of the foundation pit, pit under the ground water must be dropped to below 0.5m, to facilitate the foundation treatment and foundation construction. In this paper, combined with the geological condition and the practical engineering, the reference "construction of foundation pit supporting technical specification" (JGJ120-99) related to the content of groundwater control section, determine the tube well drainage scheme, after the implementation of the program reached expected effects, which to offer a reference for similar engineering. Key words: deep foundation pit dewatering scheme 中图分类号:TV551.4+1 文献标识码:A 文章编号:2095-2104(2025) 1 田市泵站的工程及地质状况 1.1 田市泵站的工程概况 田市泵站位于渭南市临渭区田市镇南,改造工程的主要内容为拆除重建主副厂房、进出水池等进出水建筑物,更新改造水泵电机7 台套。由田市泵站施工图册知:泵站厂房平面为“L”形,副厂房位于厂房的左端,检修间位于厂房的右端,厂房总长为 58.63 m,主厂房长 45 m,宽 10 m;进水部分长度为 60 m;场地地面平均高程▼360.40,基坑底面高程▼349.366。由以上数据分析得到:基坑开挖宽约 55m、长约 70m、深约 11.034 m。 1.2 工程地质条件 工程场地地处渭河二级阶地,地形平坦,相对高差<0.50m。场地勘探深度内地基土可分为四个工程地质层,①黄土状土(Q4eol+pl):褐黄色,湿,稍密,可塑状,有虫孔及针状孔隙,见零星蜗牛壳。据土工试验资料:=25.2%、=0.906、Il=0.68。该层土分布...