L46A1 Mast Section What matters should be noted in Tower Crane Foundation Construction
tower crane, in the construction industry, transport plays an extremely important role in the field, the increasing use of the number of accidents also caused by the increase in the number. In the analysis of the causes of tower crane accidents, it is not difficult to find that there are quite a number of cases related to tower crane overturning, which shows that the construction of Tower Crane Foundation is an indispensable link to ensure the safety of construction. The causes of the Tower Crane Foundation accident are analyzed.
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In order to hold up the construction time, some construction sites installed the tower crane carelessly when the concrete strength was not enough, which caused the tower crane to bear more weight than the ground stress limit The two excavations near the foundation of the tower crane lead to the landslide and even the displacement of the tower crane, which lead to the tower crane accident In recent years, many cities in China draw too much groundwater, resulting in groundwater funnel, and then lead to uneven settlement, affecting the operation and construction of tower crane. In order to prevent these accidents, the construction unit must make sure that the ground resistance meets the design requirements and the strength of reinforced concrete reaches at least 80% of the design value. The Tower Crane Foundation with basement engineering should take special treatment measures, such as piling under the foundation, and welding the steel bar at the end of the pile to the foundation foundation anchor bolt. The bottom of the concrete foundation should be tamped smoothly, and the bottom of the foundation can not be made into a pot bottom. Base anchor bolt size error must be strictly in accordance with the requirements of the foundation map construction, anchor bolt to maintain sufficient length exposed to the ground, each anchor bolt to double-nut pre-tightening. Before installation, the foundation surface should be treated to ensure that the level of the foundation can not exceed 1 / 1000. At the same time, the foundation of the Tower Crane shall not accumulate water, which will cause uneven settlement of the foundation. No digging or trenching shall be allowed in the vicinity of the foundation of the tower crane.
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