毕设基本摘要
摘 要
深基坑支护工程设计是根据相关资料、规范而做出的。由于深基坑工程的支护形式决定了基坑工程的安全性、技术可行性和经济性，所以，在满足深基坑支护工程安全性、技术可行性的情况下，根据基坑的性质、建筑场地的地质条件和周边环境，采用不同的支护结构的组合形式可大大降低深基坑工程的支护费用。因此,根据深基坑的场地工程地质条件、基坑周边环境和基坑特点，提出了四种不同的设计方案。在综合考虑安全性、技术可行性和经济性的前提下,本设计确定了土钉墙支护、土钉墙+预应力锚杆复合型土钉墙支护、桩锚支护和放坡开挖支护的分区段支护设计方案。所有方案均运用等值梁法进行理论计算,并做了施工图设计。根据场地水文地质条件，经过比较，选用明沟排水。此外，还设计了一整套相应的施工方案，包括施工工艺、施工管理以及基坑变形监测。最后，参照有关定额完成了本基坑工程的预算编制，本工程的总造价为2233157.05元，单价为859.67元/m2.
关键词：深基坑；土钉墙支护；桩锚支护；施工组织设计；工程预算。
ABSTRACT
According to the practice experience in construction site of building in Changsha and references and standards, the project of excavation engineering was designed. Based on the engineering geology, several possible solutions were given. Generally, the type of retaining structure of a deep excavation project determines the safety and economical efficiency of a deep foundation project. Based on the characteristics in engineering geology, hydrological geology and the environment, the reasonable retaining structure types used in deep foundation project may reduce a large amount of construction cost. The design was mainly compared with the typical schedules of soil nailing wall and prestresses tieback support,pile with anchor ,excavation and soil nailing wall, making calculation in theory by equality beam , considering the environmental influence.Based on the condition in site’s hydrological geology, compared with several schedules, choosing clear ditch to drain off water .A complete scheme was also designed, including construction process; deformation monitoring is made bracing structure and construction management. Finally, this design did budget for the project. The total cost of the project is 2233157.05 Yuan RMB, that is, or 859.67 Yuan RMB per square meter.
KEY WORDS: deep excavation; pile with anchor; soil nailing wall；construction management；budget.
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