by These key points must be mastered! What are the six problems that should be solved in the implementation of list quotation? What is the preparatory work? What is the impact of canceling the approval of project cost qualification on the industry? 。.
During the transportation of components, the concrete strength shall not be less than 75% of the design concrete strength grade The fulcrum setting on the transport vehicle shall be determined according to the design requirements.
2.
Before the transportation and stacking of concrete components, the snow and ice on vehicles, components, skids and stacking site shall be removed, and the site shall be flat and solid.
Before the frozen soil melts, measures shall be taken to prevent the deformation and damage of components caused by the contact settlement of frozen soil.
4.
1.
The components transported overlapped shall be fixed with the transport vehicle and prevented from sliding~~ It is recommended to read ~ ~ project visa, progress payment and settlement audit.
When concrete components are stacked on the natural ground of frost heaving soil or backfilled on the ground before freezing, the following provisions shall be met: 2.1 under the conditions of stiffness and bearing capacity, the number of support points shall be reduced as far as possible; 2.2 for plate components such as large plates, grooved plates and hollow plates, the supporting points at both ends shall be skid with a length greater than the plate width; 2.3 when components are stacked, if there are two or more fulcrums, reliable measures shall be taken to prevent frost heaving, melting and sinking of the soil; 2.4 when components are padded with skids, the gap between the ground and components shall be greater than 150mm 3.
When stacking components on the site backfilled with frozen soil and generally compacted, when the overlapping stacking time of components is long, the number of overlapping layers shall be reduced as far as possible according to the component quality, and the contact area between the support pad of bottom component and the ground shall be appropriately increased.
