Convergence problem of model

[sasakiharuka]

Hello,

I'm working on the problem of pile-soil interaction. But it always gives me error as follows:

pult=0.592231 Cp=0.397608 ncount=1
WARNING: CTestNormDispIncr::test() - failed to converge
after: 20 iterations current Norm: 2.82141e+09 (max: 1e-05, Norm deltaR: 2.0424
1e+06)
AcceleratedNewton::solveCurrentStep() -The ConvergenceTest object failed in test
()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 1 with domain at
load factor 8
OpenSees > analyze failed, returned: -3 error flag
Finished creating loading object...
Load Application finished...
Loading Analysis execution time: 5 seconds.
---------------------------------------------------------------------------
End of script <F:\newest\Win64\proj\openSees\t1pt2.tcl> reached, Press any key to continue

"ncount" means the analysis step, ncount=1 mean the first step. Therefore, It can work at the first step but after fails to solve. I try everything by changing the algorithm , test command and iteration steps but still fail to converge. I'm very grateful to your kind help.