The interaction of two level parallel pipe jacking is analyzed;and the calculation of lateral disturbance scope is advanced.Considering the effects of former pipe jacking on the latter

a new calculational method for ground settlement of latter pipe jacking is put forward with an analytical calculation example.It is shown that the ground settlement produced by middle zone is greater because of double disturbance during parallel pipe jacking construction.Also

the surrounding soil disturbance due to former pipe jacking construction will strengthen the disturbance during latter pipe jacking construction when the axes of two pipe jacking are in close quarters.Thus

the maximum ground settlement and width of settlement trough during latter pipe jacking construction become greater.In addition

curves of ground settlement are dissymmetric for latter pipe jacking and can still be calculated with Peck formula.The maximum settlement point on curves leans towards the side of former pipe jacking.