泉州市浦西排涝泵站深基坑围护施工技术

根据泉州市浦西排涝泵站泵房、导流渠深基坑围护施工要求，针对深基坑施工中实际的地质情况，通过施工方案比选，该泵站采用钻孔桩及混凝土构件内撑、水泥搅拌桩外护帷幕止水的深基坑外围护的型式。围护结构简单、施工操作方便、工效高、适应性广，可为泵站深基坑施工提供充足的时间。外护内撑式的基坑围护造价主要为钻孔桩及水泥搅拌桩，工程投资相对较省，采用水泥搅拌桩帷幕防渗效果较好，配备可靠的基坑降水措施，可适用于沿海淤泥夹砂地基的泵站深基坑围护施工，以供借鉴。

Quanzhou City Enclosure Protection Construction Technologies of Deep Foundation Pit for Puxi Flood Drainage Pumping Station

In accordance with requirements on deep foundation pit enclosure protection construction of pumping house of Puxi Flood Drainage Pumping Station and diversion channel of Quanzhou City, direct at practical geological condition of deep foundation pit, through comparison between construction schemes, the pumping station adopts type of deep foundation pit enclosure protection with bored pile and inner support of concrete component - outer protection curtain water stop. The enclosure protection is characterized by simple structure, easy construction, high construction efficacy and extensive adaptability, which can provide sufficient time for deep foundation pit construction of the pumping station. Pricing of the outer- protection- inner- support - typed foundation pit enclosure protection is mainly attributed to bored pile and cement mixing pile, investment in the project hence is lower, adopting cement mixing pile cretin seepage which will get better result, in addition to reliable dewatering measures on foundation pit outfitted that can be applied to the pumping station＇s enclosure protection construction of coastal base mixed with silts and gravels, which is available for reference.