方案设计阶段基坑支护方案经济比选要点——以上海临港地区某基坑支护工程为例

Key Points of Economic Comparison & Selection of Foundation Pit Support Schemes in Scheme Design Stage——Taking a Foundation Pit Support Project in Shanghai Port Area as an Example

基坑支护形式多样,涉及岩土、结构、施工技术和建筑经济等多项专业,与项目所在地地质状况关系紧密,建设单位往往会面对如何选择支护形式的难题,尤其是在方案前期阶段,在一切都还未定的时候,往往是最难的时候,因为万事开头难。作为一个项目最前期的方案选择,需要考虑和统筹的因素需要决策者有统筹大局的能力;方案在落地前充满了不确定性,往往会因为一个小小的变化导致方案的巨大变更,所以也需要决策者有随机应变的能力。所以如何在多个方案中选出工期合适、造价合理、安全可靠的施工方案,是每个决策者都必须不断在实践中探索与思考的问题。文章以上海临港地区某项目基坑支护工程为例,通过对于三种基坑支护方案的全面比较,为广大造价从业人员处理方案设计阶段基坑支护方案经济比选问题时提供参考。

Various forms of foundation pit support, related to geotechnical, structure, construction technology and construction economy, closely related to the geological conditions of the project site, construction units will often face the difficult problem of how to choose the form of support, especially in the early stage of the program, while all was still pending, often at the hardest times, because everything is difficult at the beginning, as the most early option of a project, the factors that need to be considered and coordinated also require decision makers’ ability to see the big picture, And before the plan landed, it was full of uncertainty, often because of a small change leads to a huge program change, so decision makers need to be able to adapt. Therefore, how to choose the appropriate construction period, reasonable cost, safe and reliable construction scheme in multiple schemes, is what every decision-maker must constantly explore and think about in practice. This paper takes the foundation pit support project of a project in Shanghai Lingang area as an example, through a comprehensive comparison of the three foundation pit support schemes, it provides a reference for the majority of cost practitioners to deal with the economic comparison of foundation pit support schemes in the design stage.