DESIGN OF DIAPHRAGM WALL ON 3-LEVEL BASEMENT USING GROUND ANCHOR AND STRUT SUPPORT SYSTEM IN DKI JAKARTA

• Main Author: Slogo Langit, Jagad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/43564
• Institution: Institut Teknologi Bandung

Basement is a type of development in the vertical direction down to the ground. In the construction of the basement, a retaining wall is needed. If it is still insufficient in terms of security and deformation that will occur, then it can add a reinforcement system. In this report, we discuss two types of basement wall reinforcement systems namely ground anchor and strut. The basement discussed has three levels with a depth of 5 m. The land area for the construction of the basement is 40 m x 40 m. The condition of the soil type of the study site is clay soil above the sandy soil with the water table at a depth of 6 m from the ground. The type of soil retaining wall used is the diaphragm wall. The methodology applied in this report is the preliminary design depth of penetration required by the retaining wall, strut and anchor preliminary design using the Hinge Method by adding earthquake load and construction equipment load of 10 kN / m2 in addition to lateral soil loads, strut and anchor modeling using Plaxis 2D v8.5, then when the anchor and strut design meets the specified requirements, then the reinforcement stage is continued, and a technical drawing will be made at the end of the work. The earthquake load used in this report is the earthquake load of the Okabe Method 1924 by considering earthquake load reduction due to soil cohesion parameters. The output of this report is the design of strut with a double strut system and ground anchor that is of a temporary type with a two-year service life. In addition to the design, there is also a discussion about the comparison of the design of the retaining wall using anchor and strut based on the deformation that occurs at the end of construction with a maximum requirement of 0.5% from the excavation height following zone 1 in SNI 8460-2017, global safety factor in each excavation with a minimum requirement of 1.5 according to SNI 8460-2017, the safety factor condition is given an Okabe earthquake load of 1924 with a minimum requirement of 1.1 according to SNI 8460-2017, and reinforcement of a retaining wall that uses strut and anchor on the diameter and space used for stirrup reinforcement, horizontal reinforcement, also longitudinal reinforcement.