China is now vigorously developing high-speed rail business, and in the construction of high-speed railway bridge pier is essential to the use of steel sheet pile cofferdam, in particular to cross the river and some poor geological conditions of the construction tenders . Today we focus on what is to talk about the steel sheet pile cofferdam construction design work which? This article is provided by the engineers of the Panchang Steel Sheet Pile, and we have tested it in depth.
First of all, the design of steel sheet pile coffer before we must clear the construction process, taking into account the steel sheet pile cofferdam construction and removal process of the load situation. Design designers can determine the critical design conditions in this order, calculate the Minimum embedding depth, bending moment shear force, and thus finding the steel sheet pile sections, pile length and theoretical weight
As a part of the construction of steel sheet pile cofferdam, the designer should conduct a risk assessment of any deviation from the planned process. This consequence of a variety of situations: a certain stage of super-excavation; Not to achieve the required depth of embedded; steel sheet pile support installed in the wrong position; due to construction equipment or materials caused by a huge overload.
Once it is necessary to determine the level of risk that the steel sheet pile coffers can bear according to the situation. In Consideration of the water for example, if the flood is seasonal, if the steel sheet pile cofferdam is designed to block the water in any case, it would significantly increase the size and strength of the steel sheet pile, and at the same time Will increase The amount of steel sheet pile support. Extreme flood conditions, the steel sheet pile cofferdam design concept should include the temporary suspension of steel sheet pile cofferdam construction, the withdrawal of steel sheet pile cofferdam, allow flood submerged steel sheet pile cofferdam and so on. In the case, the designer must consider the flood spill, including the impact of floods suddenly into the steel sheet pile cofferdam, and the effect of stagnant w Ater on the stability of the weir after the flood subsided.
Then, after the construction of the steel sheet pile cofferdam, the construction site should be cleaned up before the construction of the steel sheet pile cofferdam in order to set up the guide frame and the equipment in place. Before excavation, all equipment and materials must Be prepared for for example: Larsen steel piles, piling machines, digging machines, cranes, internal support materials (H steel, pipe) and so on.
Finally, after the completion of the excavation of the steel sheet pile cofferdam, it is necessary to monitor the support of the steel sheet pile cofferdam and the steel sheet pile to ensure the normal operation, to raise the alarm as soon as possible and to adjust The plan as soon as possible.