The characteristics of deformation and mechanism of furrowed crushed stone foundations for immersed tunnel are studied by plate loading tests on large-scale models with a length of 2 m,a height of 0.8 m and a width of 1.2 m which cover three conditions,i.e.loading on full-paved stone foundation,on the top between furrows,and over a furrow.Measurements include the applied load,surface displacement,furrow space and the stresses of reinforcing bars in concrete loading girder,and lateral displacement of test tank.The test results show that in all three tests,the surface settlement and the load bear a linear relationship under a load up to 750 kPa,indicating that the stone foundation is in the elastic stage of compaction;the loading curves in three tests are basically coincident and the final settlements are almost identical.It can be considered that the furrows pose no significant effect on the mechanical properties of stone foundation;during the loading process,the furrow space decreases linearly with an increase of the load,and then the furrow is gradually flattened;however,we should pay attention to the furrow effect in design that the stresses of the reinforcing bars of reinforced concrete load ding girder in furrowed stone foundation are about 20% to 30% higher than those in the full-paved stone foundation,and there will be a sharp stress increase upon a certain load;a numerical modeling method for the furrowed stone foundation is also established and the modeling results show that the load-displacement curves of the full-paved and furrowed stone foundation are basically the same,which also prove that the deformation and bearing capacity of the stone foundation are identical.