Research on assisted sinking method of large-scale caisson based on distributed hydraulic soil-breaking technology
In response to the problem that the large open caisson can not be sunken smoothly by simply taking soil when it is sunken to a certain depth or encounters hard soil layers,the failure criteria and calculation method of water jet soil breaking were obtained through analysis and calculation of the force and hydraulic soil breaking mechanism of the caisson,water jet impact force,and soil mass shear strength.Further design and nozzle selection of a distributed hydraulic soil breaking device system and nozzle layout were carried out,and a specific implementation method for a large-scale caisson assisted sinking method based on distributed hydraulic soil breaking technology was proposed.Hydraulic soil breaking verification tests were conducted at jet pressures of 3,5,7,10 and 13 MPa,and it was found that using a cylindrical nozzle with a diameter of 2 mm and hydraulic design parameters with a pressure of 10 MPa has the best soil breaking effect.The research results provide reference for the practical application of distributed hydraulic soil breaking technology in large-scale caisson sinking projects.
hydraulic soil-breakingcaissonhigh-pressure water jetsinking of caissondistributed hydraulic soil-breaking system
万方数据
维普
