290HC Mast Section Specific construction methods of tower crane repeated grounding and lightning protection grounding
Specific construction methods of tower crane repeated grounding and lightning protection grounding
290HC Mast Section：
http://www.towercranesupply.com/product/290hc-mast-section-liebherr-tower-crane
When making foundation, it can be embedded, or it can be later buried with angle steel flat steel, which is connected with the tower body; it can be buried in the underground round steel or angle steel, which is connected with flat steel; all the ground wires in the power supply line of galvanized material to the tower crane are connected with the tower body; according to code for design of building foundation (GB50007-2002), the characteristic value of foundation bearing capacity refers to the foundation soil measured by load test The maximum value of the pressure corresponding to the specified deformation in the linear deformation section of the pressure deformation curve is the proportional limit value.
Generally speaking, the characteristic value of the bearing capacity of the foundation is the maximum allowable load that the foundation will not deform for a long time, which is the maximum value of the linear section of the load deformation curve. R shall not be exceeded, otherwise the foundation will be unstable and the building will be inclined or even overturned. 150kPa = 150kn / m2, that is to say, the land must be able to bear at least 150kn force per square meter ~ if it is lower than this value, the design can not be done ~ as for the known characteristic value of single pile bearing capacity is 600kN, the calculation of the total load on the upper floor of a general civil building is normally considered as 15kn / m2 per floor, then the total load of the dormitory is generally 105kn / m2, multiplied by the area of the foundation, the whole can be calculated The weight of the building, and then divide by the number of piles to know the required bearing capacity of a single pile. Public buildings are generally considered as 20KN / m2, and the calculation is the same as above. How to calculate the allowable compressive strength of foundation bearing capacity multiplied by base area.
290HC Mast Section：
http://www.towercranesupply.com/product/290hc-mast-section-liebherr-tower-crane
