Becaure it was eas happened unequal settlement on old winden part,which must take several measure to avoid emergence portrait crack on part of subgrade widen in pavement.

• 由于旧路帮宽部分易产生不均匀沉降,为了防止路面在路基帮宽处产生纵向裂缝而采取的几种有效措施。