Study on strength characteristic for loess subgrade filter of Yumenkou-Yanliang highway

The strength characteristic for loess subgrade filler is an important calculation parameter for loess foundation engineering,slope engineering and underground engineering for it decides subgrade stabilization and slope angle.With the triaxial test,vibratory compaction test,CBR test and modulus of resilience test the paper analyses on the characteristic of shear strength,CBR and rule of resilience modulus change for compacted loess.It is shown that the relation between adhesion tension C and water content w can be expressed as the power function C=kw-b,and the change of adhesion tension C is greater than that of internal friction angle φ.The CBR of compacted loess can’t meet the least CBR of standard.It is suggested that CBR should be tested by ameliorating the time that compacted loess dip in the water.It is shown that the best water content and the largest dry density for vibration compaction of loess are less than those of heavy rammer.However,the modulus of resilience for vibration compaction of loess is larger than that of heavy rammer under the commended condition.