日本欧美一区二区三区不卡视频_亚洲欧美日韩中文字幕一区二区_日韩免费视频一区二区_欧美黑人粗大猛烈18p

Engineering Technology: General requirements for inspection of steel structure engineering foundation

Engineering Technology: General requirements for inspection of steel structure engineering foundation

     Steel installation before positioning axis response, infrastructure and elevation axes, bolt size and location of the building, such as review, and should be the basis for the handover inspection and acceptance. Such as anchor bolts required to review each bolt axis, elevation, to go beyond regulatory requirements, must take appropriate remedial measures. Such as increasing the size of the column bottom in the column base plate according to the actual location of re-drilling screws.
     When the transfer of basic engineering batches, each less than a handover acceptance column base can form the basis of the degree of spatial steel mounting unit and shall meet the following requirements: basic strength of concrete to meet the design requirements; tamp backfill around the foundation is completed; foundation the elevation and the datum axis signs and point accurate and complete; the top surface of the foundation should be flat base surface of the secondary should be watered at cutting hair, anchor bolts should be intact.
The column axis bomb test in place of the column base surface.
     The column base level for leveling. Pouring concrete column base elevation is generally reserved for 50 to 60 mm (compared with steel column base design elevation), the installation is a steel plate or take advance using slurry leveling boards.
     When using the steel plate to make the support plate, the steel plate in the area before the bottom of the column should be secondary grouting withstand tensile load and bolt tightening calculated and determined according to the following compressive strength of concrete foundation, columns soles of the feet. Base plate and the contact surface and the bottom surface of the column should be smooth, tight.
     When the syrup should be used to sit for the board using non-shrink mortar, mortar pad before lifting pillar strength should be higher than a grade basis of concrete strength and mortar pad area should be sufficient to meet the requirements of hosting.