L46A1 Mast SectionNonstandard problems in construction management
1. Some of the embedded bolts used to fix the tower body are not installed accurately, some of them are not embedded deep enough, some of them have short exposed length, and the high-strength bolts cannot be screwed in place, some of them even use bolts not provided by the manufacturer, and the bolt diameter is insufficient.
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2. The hoisting unit lacks complete design and calculation of crane ring rail beam foundation, and takes the wrong treatment method after the foundation sinks.
3. Some construction enterprises did not take reliable treatment measures for the soft soil layer under the tower crane foundation;
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4. Some of the ultra deep parts are not treated in place, so that the local foundation is suspended;
5. Some of the reinforced concrete concealed works at the foundation of the tower crane are lack of necessary acceptance, and the reinforcement binding and concrete strength do not meet the design requirements and the bearing capacity requirements of the tower crane;
6. Some foundations are uneven and no drainage measures are set, which causes the tower crane to incline due to foundation settlement in use;
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