無支撐基礎開挖工法之研究與探討

Abstract

大面積基礎開挖往往因支撐長度過長，水平支撐軸向力無法有效傳遞，而必須採用水平支撐以外之擋土工法，以有效克服基礎開挖之問題；尤其是在靈敏性軟弱土壤狀態與地下水位較高之基礎開挖時，其所可能遭遇的困難將更加嚴峻。

本研究針對實際施工發生困難的案例，藉由分析回饋評估後續補強施工之可行性，並以監測系統及施工成效加以驗證。此外，本研究藉由大潤發鳳山店基礎開挖案例，探討大面積淺基礎開挖，在無支撐之情況下，研究最適當之開挖工法。

Large area foundation excavation is owing the supporting length too long, induce horizontal support axial force cannot be effectively delivered, but must use horizontal support other than retaining method to effectively overcome the problem of basic excavation; particularly in sensitive soft soil and groundwater level nearly ground surface, it may encounter difficulties will be even more challenging. This study is intended for actual construction difficulties, by analysis of feedback assessment subsequent stiffening construction feasibility of, and to monitor the system and to verify the effectiveness of construction. In addition, the study by RT Fengshan shop case study Foundation excavation, Foundation digging area, in support of the research on the most appropriate method of excavation.