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Steel support pre pressure construction should meet the requirements
- The slenderness ratio of the support member and the thickness ratio of the plate should be based on the different fortification intensity, according to the current national standard "code for seismic design of buildings" GB 50011.4 support can be used with the original set of steel reinforced concrete members and reliable connection, and measures should be taken to support the reliable seismic force is transferred to the foundation.5 new steel support can be used for the calculation of both ends hinged, and only assume the role of earthquake.s
Which is not included in the price
- The best use of the whole hoisting gantry crane, crane from the end of the 5m position.s
For the deep foundation pit supporting steel purlin supporting scheme of a
- Construction sequenceThe pile axis positioning, U type steel sheet pile, steel sheet pile on both sides of steel purlin installed to dig to the bottom, soil structure construction, soil filling, U type steel sheet pile, the extraction of 5 operating baseline determination: Construction of foundation pit construction need to leave Longmen frame fixed axis working face to determine the position of steel sheet pile construction fixed pile position according to the order of the steel sheet pile concrete pile with marked gray line marked the plate pile driving by self vibration type steel sheet pile special mechanical plugs
Steel support can not be removed if the deformation of the foundation pit, how to solve
- You don't know is that part of the steel support: purlin, cross brace down, vertical brace, gussets
How to speed up the construction speed of steel support in the excavation area
- The axial force of the diagonal brace is 1/sin times of the same span. The angle between the axis and the axis of the crown beams
Bearing 40 tons need much steel support
- Manganese, sulfur, phosphorus, etc.. There are many kinds of classification methods, and the main methods are as follows: seven:1, according to the quality classification(1) ordinary steel (2) high quality steel (3) high quality steel2, according to the chemical classification(1) carbon steel: A. low carbon steel; B. medium carbon steel; C. high carbon steel(2): A. alloy steel and low alloy steel; B. alloy; C. alloy steels
Started to want to buy a good quality of the new steel support to go where ah
- The traditional template reinforcement system using wood plywood + + square steel tube, because the wood stiffness is small and making precision, steel and wood for the line of contact and other reasons, caused by the poor quality of concrete, yin and yang angle is not square, leakage, many quality problem of actual measurement standards etc..s
Why subway steel support axial force value
- Calculation of axial force of steel support in deep foundation pit:The first plus zero, the calculation of a cable tension, the anchor cable tension is able to ensure the stability of the foundation pit resistance, and then on the basis of the times on the basis of the standard 70~95%.Preload is generally not more than 450kN, because of the use of pile anchor structure is mostly sand, silt, or clay, anti pulling force of this stratum and anchor is limited, 450kN means that the prestressing design tension reaches 450/0.95~450/0.7, which is basically the ultimate anchor in this ordinary formation, if not met to consider the encryption of anchor spacing.s
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