某深基坑支护工程施工技术方案

某深基坑支护工程施工技术方案摘要：深基坑工程作为危险性较大的分部分项工程之一，一旦发生生产安全事故，造成的人员伤亡和经济损失十分巨大，因此对深基坑尤其是地质条件复杂的基坑，其支护工程的设计及施工技术进行研究，就变得尤为重要。本文以郑州航空港河东四棚户区一标5#地块项目基坑工程为工程背景，对基坑开挖、基坑降水、基坑支护的理论发展和目前常规使用的几种技术进行了研究，根据大连区域经验并结合国内主要的基坑支护方式，经方案比选，最终确定了在土层分布复杂的上软下硬地质条件采用上部灌注桩+下部钢管桩+预应力锚索的联合支护结构方案。关键词：基坑工程：深基坑支护：基坑施工技术Construction Technology Plan for a DeepFoundation Pit Support ProjectAbstract:As one of the high-risk sub projects,deep foundation pit engineering can causehuge casualties and economic losses in the event of a production safety accident.Therefore,itis particularly important to study the design and construction technology of supportengineering for deep foundation pits,especially those with complex geological conditions.Based on the foundation pit project of Lot 5,Lot 1 of Hedong Fourth shanty town,airport,Zhengzhou,this paper studies the theoretical development of foundation pit excavation,foundation pit dewatering,foundation pit support and several commonly used technologies,The final decision was made to adopt a combined support structure scheme of uppercast-in-place pile,lower steel pipe pile,and prestressed anchor cable in the complexgeological conditions of upper soft and lower hard soil layers.Keywords:foundation pit engineering;Deep foundation pit support;Foundation pitconstruction technology目录第1章工程概况第2章施工计划及安排22.1施工技术准备….22.2物资材料准备….22.3机具设备配置….22.4施工计划….3第3章施工工艺技术….43.1预应力锚杆施工..43.2土钉墙及喷射混凝土施工.63.3土方开挖施工…。.73.4微型桩施工.83.5位移、沉降监测103.6排水措施….173.7降水措施.17致谢21参考文献22附录23附录1：施工现场平面布置图.23附录2：施工进度计划横道图.23附录3：工程量计算书.24