Foundation work is one of the most crucial jobs in building construction. Therefore, an appropriate method is needed to determine the most effective and efficient type of foundation. One of the methods used is the paired comparison method with a value engineering approach. In this case study, the paired comparison method is used to compare the square pile foundation (existing) with the use of a triangular pile design and round piles. The total budget is Rp. 3.834.143,026,84. The analysis shows that the D-300 round pile foundation has the highest cost among the three with a total budget of 4.522.511.665.00. Based on the design scenario, square foundation work is superior in the financing, implementation time, amount of labor, concrete quality, and weather conditions in the field with a total value of 54% than the triangular and round pile foundations. Hence the final decision remains to use a square pile foundation. Abstrak Pekerjaan pondasi merupakan salah satu pekerjaan yang krusial dalam pembangunan gedung. Oleh karena itu, diperlukan metode yang tepat untuk menentukan jenis pondasi yang paling efektif dan efisien. Salah satu metode yang digunakan adalah metode paired comparison dengan pendekatan value engineering. Dalam studi kasus ini metode paired comparison digunakan untuk membandingkan pondasi tiang pancang persegi (eksisting) dengan penggunaan desain tiang pancang berbentuk segitiga dan bulat. Total anggaran dana yaitu Rp. 3.834.143.026,84. Hasil analisis menunjukan bahwasanya pondasi pancang bulat D-300 memiliki biaya yang paling tinggi diantara ketiganya dengan total anggaran 4.522.511.665,00. Berdasarkan skenario desain bahwa pekerjaan pondasi persegi lebih unggul dari segi pembiayaan, waktu pelaksanaan, jumlah tenaga kerja, mutu beton serta kondisi cuaca di lapangan dengan total nilai 54% dari pada pondasi tiang pancang berbentuk segitiga dan berbentuk bulat. Oleh karena itu keputusan akhir tetap menggunakan pondasi tiang pancang persegi.

One of the natural phenomena that threaten the existence of human life in several regions in Indonesia every time the rainy season begins is flooding, one of which occurs in the Joyoakan sub-district in Surakarta City. Topographically, it is in a hollow area (under the main road), making it easier for water to enter the area. This is what makes the Premulung and Kaliwingko rivers unable to accommodate rainwater discharge and additional rainwater shipments from the Boyolali and Sukoharjo areas. The purpose of this study is to determine how much volume of inundation in the drainage canal can be reduced in the Joyoakan area and the appropriate efforts to deal with the inundation that occurs. The method used is descriptive research, to provide an overview of the variables studied and modeling using the HEC-RAS software. The result of the calculation is that the potential for inundation that can be reduced by the drainage channel is at the Q5 return period of 6,842.577 m3, the Q10 return period is 6,962.517 m3, and at the Q25 return period is 7,100.448 m3, while the results from the channel dimension modeling analysis, there are still puddles at several points, the right alternative in overcoming inundation is the need to revitalize the drainage channels by increasing the capacity of the drainage dimensions from the current size and improving the base slope of each channel and installing pumps as a means of control in accelerating water discharge