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VOLUME XVII Edisi 1 , Januari 2013




Title

POLA KERUSAKAN BANGUNAN DI TANAH LEMPUNG EKSPANSIF DI NGAWI JAWA TIMUR

Authors
Handali, S.1), Jumadi 2), Telaumbanua, J.3)
1)Jurusan Teknik Sipil Universitas Kristen Immanuel Yogyakarta e-mail : safehandali@yahoo.com 2)Alumni S1 Teknik Sipil Fakultas Teknik Universitas Kri

Abstract

The objective of this study is to investigate the various patterns of damage that occured on structures built on an expansive clay deposit in Ngawi, East Jawa. Various damage patterns on buildings and roads due to the movement of the foundation soil were observed and compared with known damage patterns obtained from the literatures in order to understand how the movement and deformation of the soil led to a particular type of damage. Observation carried out on the floors of the affected buildings revealed cracks that were in parallel directions with the walls. Other cracks were in diagonal direction of the floor as well as those which were perpendicular to the diagonal direction of the floor. The walls have vertical, horizontal as well as slanted cracks and cracks that were originally oriented in the vertical direction but then turned to the horizontal direction, or vice versa. Comparisons with known crack patterns from the literatures revealed that the crack patterns observed on the floors and walls were the result of the seasonal heaving and sinking of the subsoil, resulting in the floor to experience alternating change in shape from convex to concave and different parts of the walls to experience tensile forces. Heaving and shrinking of the soil was worst in parts of the buildings that were located adjacent to the outside the buildings because of the
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