Abstract
Reducing the settlements of smooth foundation efficiently is a crucial problem of excessive-pace railway creation in China. The new CFG pile-slab structure composite foundation is a floor remedy method that is carried out on CFG pile basis and pile-slab structure composite basis. Based on the revel in of constructing Beijing-Shanghai excessive-pace railway in China, the settlement-controlling effect, the settlement distribution legal guidelines and 3 key influence elements for structural shape of latest CFG pile-slab structural foundation are studied by the use of physical model exams and numerical simulations. The research results on this look at imply that the piles and soil bearing capacities of the new CFG pile-slab shape can be positioned into complete play due to the “load dispensing” function of slabs. The settlement decreasing effect of the new CFG pile-slab shape is first rate and can meet the requirements of high-pace railway creation. The affected location of engineering load has a depth over 18.Seventy five m and horizontal period of 7.Five m nearing the embankment slope toe. The parametric observe presents the optimalizing structural form for high-quality agreement-controlling effect. The bodily version test results display precise concordance with the numerical simulation effects. The mixture of bodily version assessments and numerical simulations justifies the usage of this version in geotechnical engineering practices.
Highlights
With the speedy growing visitors needs, increasingly more high-pace railways are being constructed in China
Shen et al [9] set up a three-dimensionalsimulation model of CFG pile foundation to investigatethe influence of different cushion thicknesses on thedeformation of CFG pile foundation
A comparative analysis among the settlement of the naturalfoundation, the CFG pile composite foundation, andthe CFG pile-slab structure-reinforced foundation It can be observed that the maximum settlementof the natural foundation is much larger than that of eitherthe CFG composite foundation or the CFG pile-slab structure.It can be noticed that when the external load per unitis 300 kPa, the CFG pile-slab structure is able to reduce thesettlement of the natural foundation from 93.8 mm to34.7 mm
Summary
With the speedy growing visitors needs, increasingly more high-pace railways are being constructed in China. It was concluded from their study that a multi-column composite foundation allows for a fast rate of consolidation and significantly increases the embankment stability. Chen et al (2008a, 2008b) conducted model tests to investigate the soil arching mechanism in embankments with and without reinforcement.
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