Uneven settlement of the foundation from qqq's blog
The floor slabs produced by uneven settlement of the foundation are accompanied by a portion of the concrete along the height of the building
Soil components and internal and external wall cracking and other characteristics. Such as: a teaching building for the brick structure, the basis of the use of sinking pipe pile, because the pile did not hit the holding layer, the building serious uneven settlement, resulting in walls, beams, part of the beam-column joints and cast-in-place concrete slab Cracked.Road Repair Equipment - Doan Machinery
Concrete strength, a serious shortage of concrete slab
A four-storey brick and concrete structure office building, completed and delivered in 1988, recently found three or four floor part of the board surface along the supporting wall around the wall cracks, the bottom of the plate to the four sides of the extension of the oblique cracks (see Figure 1 ). The fracture form is consistent with the stress characteristics of the floor, and the strength of the concrete of the three floors and two floors is detected by the bulletin method. OMPa, four layers of two open floor of the concrete strength of the estimated values ??were *. SMPa and *. 7MPa, are less than the standard value of the design strength C18; Drilling measurement The above four open floor of the concrete slab thickness measured between 58-62nun, are less than the design value (80mm). Therefore, it can be determined that the floor cracks are concrete strength, the concrete thickness is seriously insufficient, the use of disasters and accidents, a large commercial center has two basement, during the construction process, due to groundwater buoyancy caused by the basement and superstructure of the floor, Column cracks and floating phenomenon, part of the floor serious cracking. A building center in the construction due to a strong typhoon positive attack, the main building on the west side of a 400 tons of rice tower crane was strong wind down, the main building on the west side of the reinforced concrete frame structure suffered heavy damage, reinforced concrete floor and frame beam column serious cracking, concrete Component damage is serious.
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