Analysis of Reasons for Inclined Existing Building

• Main Authors: Yao-Chang Lin, 林耀長
• Other Authors: James C. Ni
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/53184728159266081578

碩士 === 國立臺北科技大學 === 土木與防災技術研究所 === 92 === The common causes for inclination of buildings include construction taken place in the surrounding environment, foundation excavation, improper excavation, and natural disasters, such as earthquake. Design-related causes include deformation, rise, consolidation, and liquefaction of retaining wall, and related factors include poor construction quality, water drainage in construction, and construction of retaining wall. This study discussed cause of inclination, and collected current data on soil condition, water level and pressure of underground water, excavation area and shape, overload of the surrounding area, the effect of supplementary construction before and after excavation, the construction method of the retaining wall, the penetration depth of the retaining wall, the style and durability of the retaining wall, the completeness of the retaining wall, the supporting mechanism and construction method, refill after pile-drawing, and potential deformation of soil. This study chose Taipei City Library Songshan Branch to be the subject, and conducted an evaluation model on the causes of inclination of the building. This study first collected data on the surrounding buildings (structure, crevices, vertical inclination, collision distance, and geological data), then conducted long-term monitor on the buildings (vertical measurement, inclination measurement, differential settlement, settlement monitoring), and analyzed the impact of construction in neighboring area (penetration depth, position change of the retaining wall, sand damage test, excavation settlement impact), as well as geological conditions. Lastly, suggestions on stabilization, reinforcement, and strengthening were proposed based on the results, in order to provide a complete evaluation process to evaluation on other inclined buildings, and guidelines to construction professionals on reinforcement or reconstruction.