沿海地区深基坑降水和支护技术研究

STUDY ON DEWATERING AND SUPPORTING TECHNOLOGY OF DEEP FOUNDATION PIT IN COASTAL AREA

分析了当前深基坑工程降水和支护技术,针对沿海地区饱和粉砂与粘土互层地质条件下的深基坑降水和支护进行创新,提出了沿海地区饱和粉砂与粘土互层地质条件深基坑降水、支护施工技术,采用门型双排灌注桩具有较大的侧向刚度,增强了支护体系的抗变形能力,抗倾覆能力,止水效果好。止水帷幕加双排灌注桩支护体系降水效果好。通过门型双排桩、水泥土搅拌桩、钢板桩、放坡及多种降水措施的组合运用,使得施工简便、环保、作业高效。

The current dewatering and supporting technology of foundation pit engineering were ana- lyzed in the paper. The innovative construction technology of dewatering and supporting of deep founda- tion pit in the condition of the saturated silt and clay layer was put forward. The technology took gate type double row piles, making it have a larger lateral stiffness, which enhanced the anti - deformation a- bility, anti - overturning ability and sealing effect of the supporting system. Additionally, waterproof cur- tain with double row pile supporting system has a good precipitation effect. By using the combination of the gate type double row pile and cement mixing pile, steel sheet pile, slope and rainfall measures, the construction becomes simple, environmental protection, efficient operation.