本研究之目的在於探討生石灰樁降低黏性土壤含水量之功效，於實驗室中進行生石灰樁複合土體之模型試驗，同時配合理論推導的方式，藉以相互驗證改良效果與實驗結果的可靠性，同時作為定量分析以及評估改良成效上的依據。研究結果顯示，生石灰樁對於降低黏性土壤的含水量極具功效與時效性，有助於改善軟弱黏性土壤之工程性質以及強化基礎土壤之穩定性。此外，本文所推導的含水量理論分析模式，似乎亦較其他學者的研究成果，更能合理的評估改良成效，將有助於工程實務以及軟弱建築地盤在基地改良應用上的參考。

The purpose of this research is to study the reduced efficiency of water content in cohesive soil using quicklime. A series of model tests for composite soil are processed at a laboratory, and theoretical analyses of water content are produced simultaneously, too. Both of the above are used to verify mutually the reliability of the test result and improvement effect, and can be used as the basis of quantitative analysis and effective estimation in water content reduction of composite soil. Research results show that water content reduction of cohesive soil has significant efficacy and rapidity, and is helpful in improving the engineering properties and intensifying the soil stability of soft cohesive soil. Moreover, compared to other researchers’ formulas, theoretical analysis of the formula of water content in this research can more reasonably estimate the improvement effects, and will be helpful for using as the basis of related engineering applications.